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5aa04b01 | 1 | /* Target Code for TI C6X |
fbd26352 | 2 | Copyright (C) 2010-2019 Free Software Foundation, Inc. |
5aa04b01 | 3 | Contributed by Andrew Jenner <andrew@codesourcery.com> |
4 | Contributed by Bernd Schmidt <bernds@codesourcery.com> | |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published | |
10 | by the Free Software Foundation; either version 3, or (at your | |
11 | option) any later version. | |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
14 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
15 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
16 | License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GCC; see the file COPYING3. If not see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
785790dc | 22 | #define IN_TARGET_CODE 1 |
23 | ||
5aa04b01 | 24 | #include "config.h" |
25 | #include "system.h" | |
26 | #include "coretypes.h" | |
9ef16211 | 27 | #include "backend.h" |
c1eb80de | 28 | #include "target.h" |
5aa04b01 | 29 | #include "rtl.h" |
c1eb80de | 30 | #include "tree.h" |
31 | #include "gimple-expr.h" | |
32 | #include "cfghooks.h" | |
9ef16211 | 33 | #include "df.h" |
ad7b10a2 | 34 | #include "memmodel.h" |
c1eb80de | 35 | #include "tm_p.h" |
36 | #include "stringpool.h" | |
30a86690 | 37 | #include "attribs.h" |
c1eb80de | 38 | #include "optabs.h" |
39 | #include "regs.h" | |
40 | #include "emit-rtl.h" | |
41 | #include "recog.h" | |
42 | #include "cgraph.h" | |
43 | #include "diagnostic-core.h" | |
9ed99284 | 44 | #include "stor-layout.h" |
45 | #include "varasm.h" | |
46 | #include "calls.h" | |
5aa04b01 | 47 | #include "output.h" |
48 | #include "insn-attr.h" | |
d53441c8 | 49 | #include "explow.h" |
5aa04b01 | 50 | #include "expr.h" |
94ea8568 | 51 | #include "cfgrtl.h" |
5aa04b01 | 52 | #include "sched-int.h" |
5aa04b01 | 53 | #include "tm-constrs.h" |
5aa04b01 | 54 | #include "langhooks.h" |
5aa04b01 | 55 | #include "sel-sched.h" |
56 | #include "debug.h" | |
758df283 | 57 | #include "hw-doloop.h" |
9a4c7d5b | 58 | #include "regrename.h" |
b9ed1410 | 59 | #include "dumpfile.h" |
f7715905 | 60 | #include "builtins.h" |
5aa04b01 | 61 | |
0c71fb4f | 62 | /* This file should be included last. */ |
4b498588 | 63 | #include "target-def.h" |
64 | ||
5aa04b01 | 65 | /* Table of supported architecture variants. */ |
66 | typedef struct | |
67 | { | |
68 | const char *arch; | |
69 | enum c6x_cpu_type type; | |
70 | unsigned short features; | |
71 | } c6x_arch_table; | |
72 | ||
73 | /* A list of all ISAs, mapping each one to a representative device. | |
74 | Used for -march selection. */ | |
75 | static const c6x_arch_table all_isas[] = | |
76 | { | |
77 | #define C6X_ISA(NAME,DEVICE,FLAGS) \ | |
78 | { NAME, DEVICE, FLAGS }, | |
79 | #include "c6x-isas.def" | |
80 | #undef C6X_ISA | |
81 | { NULL, C6X_CPU_C62X, 0 } | |
82 | }; | |
83 | ||
84 | /* This is the parsed result of the "-march=" option, if given. */ | |
85 | enum c6x_cpu_type c6x_arch = C6X_DEFAULT_ARCH; | |
86 | ||
87 | /* A mask of insn types that are allowed by the architecture selected by | |
88 | the -march option. */ | |
89 | unsigned long c6x_insn_mask = C6X_DEFAULT_INSN_MASK; | |
90 | ||
91 | /* The instruction that is being output (as obtained from FINAL_PRESCAN_INSN). | |
92 | */ | |
de089fe5 | 93 | static rtx_insn *c6x_current_insn = NULL; |
5aa04b01 | 94 | |
95 | /* A decl we build to access __c6xabi_DSBT_base. */ | |
96 | static GTY(()) tree dsbt_decl; | |
97 | \f | |
98 | /* Determines whether we run our final scheduling pass or not. We always | |
99 | avoid the normal second scheduling pass. */ | |
100 | static int c6x_flag_schedule_insns2; | |
101 | ||
102 | /* Determines whether we run variable tracking in machine dependent | |
103 | reorganization. */ | |
104 | static int c6x_flag_var_tracking; | |
105 | ||
106 | /* Determines whether we use modulo scheduling. */ | |
107 | static int c6x_flag_modulo_sched; | |
108 | ||
109 | /* Record the state of flag_pic before we set it to 1 for DSBT. */ | |
110 | int c6x_initial_flag_pic; | |
111 | \f | |
112 | typedef struct | |
113 | { | |
114 | /* We record the clock cycle for every insn during scheduling. */ | |
115 | int clock; | |
116 | /* After scheduling, we run assign_reservations to choose unit | |
117 | reservations for all insns. These are recorded here. */ | |
118 | int reservation; | |
119 | /* Records the new condition for insns which must be made | |
120 | conditional after scheduling. An entry of NULL_RTX means no such | |
121 | change is necessary. */ | |
122 | rtx new_cond; | |
123 | /* True for the first insn that was scheduled in an ebb. */ | |
124 | bool ebb_start; | |
87ded687 | 125 | /* The scheduler state after the insn, transformed into a mask of UNIT_QID |
126 | bits rather than storing the state. Meaningful only for the last | |
127 | insn in a cycle. */ | |
128 | unsigned int unit_mask; | |
5aa04b01 | 129 | } c6x_sched_insn_info; |
130 | ||
5aa04b01 | 131 | |
132 | /* Record a c6x_sched_insn_info structure for every insn in the function. */ | |
f1f41a6c | 133 | static vec<c6x_sched_insn_info> insn_info; |
5aa04b01 | 134 | |
f1f41a6c | 135 | #define INSN_INFO_LENGTH (insn_info).length () |
136 | #define INSN_INFO_ENTRY(N) (insn_info[(N)]) | |
5aa04b01 | 137 | |
138 | static bool done_cfi_sections; | |
139 | ||
5aa04b01 | 140 | #define RESERVATION_FLAG_D 1 |
141 | #define RESERVATION_FLAG_L 2 | |
142 | #define RESERVATION_FLAG_S 4 | |
143 | #define RESERVATION_FLAG_M 8 | |
144 | #define RESERVATION_FLAG_DL (RESERVATION_FLAG_D | RESERVATION_FLAG_L) | |
145 | #define RESERVATION_FLAG_DS (RESERVATION_FLAG_D | RESERVATION_FLAG_S) | |
146 | #define RESERVATION_FLAG_LS (RESERVATION_FLAG_L | RESERVATION_FLAG_S) | |
147 | #define RESERVATION_FLAG_DLS (RESERVATION_FLAG_D | RESERVATION_FLAG_LS) | |
148 | ||
87ded687 | 149 | /* The DFA names of the units. */ |
150 | static const char *const c6x_unit_names[] = | |
151 | { | |
152 | "d1", "l1", "s1", "m1", "fps1", "fpl1", "adddps1", "adddpl1", | |
153 | "d2", "l2", "s2", "m2", "fps2", "fpl2", "adddps2", "adddpl2" | |
154 | }; | |
155 | ||
156 | /* The DFA unit number for each unit in c6x_unit_names[]. */ | |
157 | static int c6x_unit_codes[ARRAY_SIZE (c6x_unit_names)]; | |
158 | ||
159 | /* Unit query IDs. */ | |
160 | #define UNIT_QID_D1 0 | |
161 | #define UNIT_QID_L1 1 | |
162 | #define UNIT_QID_S1 2 | |
163 | #define UNIT_QID_M1 3 | |
164 | #define UNIT_QID_FPS1 4 | |
165 | #define UNIT_QID_FPL1 5 | |
166 | #define UNIT_QID_ADDDPS1 6 | |
167 | #define UNIT_QID_ADDDPL1 7 | |
168 | #define UNIT_QID_SIDE_OFFSET 8 | |
169 | ||
5aa04b01 | 170 | #define RESERVATION_S1 2 |
87ded687 | 171 | #define RESERVATION_S2 10 |
758df283 | 172 | |
173 | /* An enum for the unit requirements we count in the UNIT_REQS table. */ | |
174 | enum unitreqs | |
175 | { | |
176 | UNIT_REQ_D, | |
177 | UNIT_REQ_L, | |
178 | UNIT_REQ_S, | |
179 | UNIT_REQ_M, | |
180 | UNIT_REQ_DL, | |
181 | UNIT_REQ_DS, | |
182 | UNIT_REQ_LS, | |
183 | UNIT_REQ_DLS, | |
184 | UNIT_REQ_T, | |
185 | UNIT_REQ_X, | |
186 | UNIT_REQ_MAX | |
187 | }; | |
188 | ||
189 | /* A table used to count unit requirements. Used when computing minimum | |
190 | iteration intervals. */ | |
191 | typedef int unit_req_table[2][UNIT_REQ_MAX]; | |
192 | static unit_req_table unit_reqs; | |
5aa04b01 | 193 | \f |
194 | /* Register map for debugging. */ | |
5d77e25b | 195 | unsigned const dbx_register_map[FIRST_PSEUDO_REGISTER] = |
5aa04b01 | 196 | { |
197 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, /* A0 - A15. */ | |
198 | 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, /* A16 - A32. */ | |
199 | 50, 51, 52, | |
200 | 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, /* B0 - B15. */ | |
201 | 29, 30, 31, | |
202 | 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, /* B16 - B32. */ | |
203 | 66, 67, 68, | |
204 | -1, -1, -1 /* FP, ARGP, ILC. */ | |
205 | }; | |
206 | \f | |
207 | /* Allocate a new, cleared machine_function structure. */ | |
208 | ||
209 | static struct machine_function * | |
210 | c6x_init_machine_status (void) | |
211 | { | |
25a27413 | 212 | return ggc_cleared_alloc<machine_function> (); |
5aa04b01 | 213 | } |
214 | ||
215 | /* Implement TARGET_OPTION_OVERRIDE. */ | |
216 | ||
217 | static void | |
218 | c6x_option_override (void) | |
219 | { | |
87ded687 | 220 | unsigned i; |
221 | ||
5aa04b01 | 222 | if (global_options_set.x_c6x_arch_option) |
223 | { | |
224 | c6x_arch = all_isas[c6x_arch_option].type; | |
225 | c6x_insn_mask &= ~C6X_INSNS_ALL_CPU_BITS; | |
226 | c6x_insn_mask |= all_isas[c6x_arch_option].features; | |
227 | } | |
228 | ||
229 | c6x_flag_schedule_insns2 = flag_schedule_insns_after_reload; | |
230 | flag_schedule_insns_after_reload = 0; | |
231 | ||
232 | c6x_flag_modulo_sched = flag_modulo_sched; | |
233 | flag_modulo_sched = 0; | |
234 | ||
235 | init_machine_status = c6x_init_machine_status; | |
236 | ||
87ded687 | 237 | for (i = 0; i < ARRAY_SIZE (c6x_unit_names); i++) |
238 | c6x_unit_codes[i] = get_cpu_unit_code (c6x_unit_names[i]); | |
239 | ||
5aa04b01 | 240 | if (flag_pic && !TARGET_DSBT) |
241 | { | |
242 | error ("-fpic and -fPIC not supported without -mdsbt on this target"); | |
243 | flag_pic = 0; | |
244 | } | |
245 | c6x_initial_flag_pic = flag_pic; | |
246 | if (TARGET_DSBT && !flag_pic) | |
247 | flag_pic = 1; | |
248 | } | |
249 | ||
250 | ||
251 | /* Implement the TARGET_CONDITIONAL_REGISTER_USAGE hook. */ | |
252 | ||
253 | static void | |
254 | c6x_conditional_register_usage (void) | |
255 | { | |
256 | int i; | |
257 | if (c6x_arch == C6X_CPU_C62X || c6x_arch == C6X_CPU_C67X) | |
258 | for (i = 16; i < 32; i++) | |
259 | { | |
260 | fixed_regs[i] = 1; | |
261 | fixed_regs[32 + i] = 1; | |
262 | } | |
263 | if (TARGET_INSNS_64) | |
264 | { | |
265 | SET_HARD_REG_BIT (reg_class_contents[(int)PREDICATE_A_REGS], | |
266 | REG_A0); | |
267 | SET_HARD_REG_BIT (reg_class_contents[(int)PREDICATE_REGS], | |
268 | REG_A0); | |
269 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)NONPREDICATE_A_REGS], | |
270 | REG_A0); | |
271 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)NONPREDICATE_REGS], | |
272 | REG_A0); | |
273 | } | |
274 | } | |
275 | \f | |
276 | static GTY(()) rtx eqdf_libfunc; | |
277 | static GTY(()) rtx nedf_libfunc; | |
278 | static GTY(()) rtx ledf_libfunc; | |
279 | static GTY(()) rtx ltdf_libfunc; | |
280 | static GTY(()) rtx gedf_libfunc; | |
281 | static GTY(()) rtx gtdf_libfunc; | |
282 | static GTY(()) rtx eqsf_libfunc; | |
283 | static GTY(()) rtx nesf_libfunc; | |
284 | static GTY(()) rtx lesf_libfunc; | |
285 | static GTY(()) rtx ltsf_libfunc; | |
286 | static GTY(()) rtx gesf_libfunc; | |
287 | static GTY(()) rtx gtsf_libfunc; | |
288 | static GTY(()) rtx strasgi_libfunc; | |
289 | static GTY(()) rtx strasgi64p_libfunc; | |
290 | ||
291 | /* Implement the TARGET_INIT_LIBFUNCS macro. We use this to rename library | |
292 | functions to match the C6x ABI. */ | |
293 | ||
294 | static void | |
295 | c6x_init_libfuncs (void) | |
296 | { | |
297 | /* Double-precision floating-point arithmetic. */ | |
298 | set_optab_libfunc (add_optab, DFmode, "__c6xabi_addd"); | |
299 | set_optab_libfunc (sdiv_optab, DFmode, "__c6xabi_divd"); | |
300 | set_optab_libfunc (smul_optab, DFmode, "__c6xabi_mpyd"); | |
301 | set_optab_libfunc (neg_optab, DFmode, "__c6xabi_negd"); | |
302 | set_optab_libfunc (sub_optab, DFmode, "__c6xabi_subd"); | |
303 | ||
304 | /* Single-precision floating-point arithmetic. */ | |
305 | set_optab_libfunc (add_optab, SFmode, "__c6xabi_addf"); | |
306 | set_optab_libfunc (sdiv_optab, SFmode, "__c6xabi_divf"); | |
307 | set_optab_libfunc (smul_optab, SFmode, "__c6xabi_mpyf"); | |
308 | set_optab_libfunc (neg_optab, SFmode, "__c6xabi_negf"); | |
309 | set_optab_libfunc (sub_optab, SFmode, "__c6xabi_subf"); | |
310 | ||
311 | /* Floating-point comparisons. */ | |
312 | eqsf_libfunc = init_one_libfunc ("__c6xabi_eqf"); | |
313 | nesf_libfunc = init_one_libfunc ("__c6xabi_neqf"); | |
314 | lesf_libfunc = init_one_libfunc ("__c6xabi_lef"); | |
315 | ltsf_libfunc = init_one_libfunc ("__c6xabi_ltf"); | |
316 | gesf_libfunc = init_one_libfunc ("__c6xabi_gef"); | |
317 | gtsf_libfunc = init_one_libfunc ("__c6xabi_gtf"); | |
318 | eqdf_libfunc = init_one_libfunc ("__c6xabi_eqd"); | |
319 | nedf_libfunc = init_one_libfunc ("__c6xabi_neqd"); | |
320 | ledf_libfunc = init_one_libfunc ("__c6xabi_led"); | |
321 | ltdf_libfunc = init_one_libfunc ("__c6xabi_ltd"); | |
322 | gedf_libfunc = init_one_libfunc ("__c6xabi_ged"); | |
323 | gtdf_libfunc = init_one_libfunc ("__c6xabi_gtd"); | |
324 | ||
325 | set_optab_libfunc (eq_optab, SFmode, NULL); | |
326 | set_optab_libfunc (ne_optab, SFmode, "__c6xabi_neqf"); | |
327 | set_optab_libfunc (gt_optab, SFmode, NULL); | |
328 | set_optab_libfunc (ge_optab, SFmode, NULL); | |
329 | set_optab_libfunc (lt_optab, SFmode, NULL); | |
330 | set_optab_libfunc (le_optab, SFmode, NULL); | |
331 | set_optab_libfunc (unord_optab, SFmode, "__c6xabi_unordf"); | |
332 | set_optab_libfunc (eq_optab, DFmode, NULL); | |
333 | set_optab_libfunc (ne_optab, DFmode, "__c6xabi_neqd"); | |
334 | set_optab_libfunc (gt_optab, DFmode, NULL); | |
335 | set_optab_libfunc (ge_optab, DFmode, NULL); | |
336 | set_optab_libfunc (lt_optab, DFmode, NULL); | |
337 | set_optab_libfunc (le_optab, DFmode, NULL); | |
338 | set_optab_libfunc (unord_optab, DFmode, "__c6xabi_unordd"); | |
339 | ||
340 | /* Floating-point to integer conversions. */ | |
341 | set_conv_libfunc (sfix_optab, SImode, DFmode, "__c6xabi_fixdi"); | |
342 | set_conv_libfunc (ufix_optab, SImode, DFmode, "__c6xabi_fixdu"); | |
343 | set_conv_libfunc (sfix_optab, DImode, DFmode, "__c6xabi_fixdlli"); | |
344 | set_conv_libfunc (ufix_optab, DImode, DFmode, "__c6xabi_fixdull"); | |
345 | set_conv_libfunc (sfix_optab, SImode, SFmode, "__c6xabi_fixfi"); | |
346 | set_conv_libfunc (ufix_optab, SImode, SFmode, "__c6xabi_fixfu"); | |
347 | set_conv_libfunc (sfix_optab, DImode, SFmode, "__c6xabi_fixflli"); | |
348 | set_conv_libfunc (ufix_optab, DImode, SFmode, "__c6xabi_fixfull"); | |
349 | ||
350 | /* Conversions between floating types. */ | |
351 | set_conv_libfunc (trunc_optab, SFmode, DFmode, "__c6xabi_cvtdf"); | |
352 | set_conv_libfunc (sext_optab, DFmode, SFmode, "__c6xabi_cvtfd"); | |
353 | ||
354 | /* Integer to floating-point conversions. */ | |
355 | set_conv_libfunc (sfloat_optab, DFmode, SImode, "__c6xabi_fltid"); | |
356 | set_conv_libfunc (ufloat_optab, DFmode, SImode, "__c6xabi_fltud"); | |
357 | set_conv_libfunc (sfloat_optab, DFmode, DImode, "__c6xabi_fltllid"); | |
358 | set_conv_libfunc (ufloat_optab, DFmode, DImode, "__c6xabi_fltulld"); | |
359 | set_conv_libfunc (sfloat_optab, SFmode, SImode, "__c6xabi_fltif"); | |
360 | set_conv_libfunc (ufloat_optab, SFmode, SImode, "__c6xabi_fltuf"); | |
361 | set_conv_libfunc (sfloat_optab, SFmode, DImode, "__c6xabi_fltllif"); | |
362 | set_conv_libfunc (ufloat_optab, SFmode, DImode, "__c6xabi_fltullf"); | |
363 | ||
364 | /* Long long. */ | |
365 | set_optab_libfunc (smul_optab, DImode, "__c6xabi_mpyll"); | |
366 | set_optab_libfunc (ashl_optab, DImode, "__c6xabi_llshl"); | |
367 | set_optab_libfunc (lshr_optab, DImode, "__c6xabi_llshru"); | |
368 | set_optab_libfunc (ashr_optab, DImode, "__c6xabi_llshr"); | |
369 | ||
370 | set_optab_libfunc (sdiv_optab, SImode, "__c6xabi_divi"); | |
371 | set_optab_libfunc (udiv_optab, SImode, "__c6xabi_divu"); | |
372 | set_optab_libfunc (smod_optab, SImode, "__c6xabi_remi"); | |
373 | set_optab_libfunc (umod_optab, SImode, "__c6xabi_remu"); | |
374 | set_optab_libfunc (sdivmod_optab, SImode, "__c6xabi_divremi"); | |
375 | set_optab_libfunc (udivmod_optab, SImode, "__c6xabi_divremu"); | |
376 | set_optab_libfunc (sdiv_optab, DImode, "__c6xabi_divlli"); | |
377 | set_optab_libfunc (udiv_optab, DImode, "__c6xabi_divull"); | |
378 | set_optab_libfunc (smod_optab, DImode, "__c6xabi_remlli"); | |
379 | set_optab_libfunc (umod_optab, DImode, "__c6xabi_remull"); | |
380 | set_optab_libfunc (udivmod_optab, DImode, "__c6xabi_divremull"); | |
381 | ||
382 | /* Block move. */ | |
383 | strasgi_libfunc = init_one_libfunc ("__c6xabi_strasgi"); | |
384 | strasgi64p_libfunc = init_one_libfunc ("__c6xabi_strasgi_64plus"); | |
385 | } | |
386 | ||
387 | /* Begin the assembly file. */ | |
388 | ||
389 | static void | |
390 | c6x_file_start (void) | |
391 | { | |
392 | /* Variable tracking should be run after all optimizations which change order | |
393 | of insns. It also needs a valid CFG. This can't be done in | |
394 | c6x_override_options, because flag_var_tracking is finalized after | |
395 | that. */ | |
396 | c6x_flag_var_tracking = flag_var_tracking; | |
397 | flag_var_tracking = 0; | |
398 | ||
399 | done_cfi_sections = false; | |
400 | default_file_start (); | |
401 | ||
402 | /* Arrays are aligned to 8-byte boundaries. */ | |
403 | asm_fprintf (asm_out_file, | |
404 | "\t.c6xabi_attribute Tag_ABI_array_object_alignment, 0\n"); | |
405 | asm_fprintf (asm_out_file, | |
406 | "\t.c6xabi_attribute Tag_ABI_array_object_align_expected, 0\n"); | |
407 | ||
408 | /* Stack alignment is 8 bytes. */ | |
409 | asm_fprintf (asm_out_file, | |
410 | "\t.c6xabi_attribute Tag_ABI_stack_align_needed, 0\n"); | |
411 | asm_fprintf (asm_out_file, | |
412 | "\t.c6xabi_attribute Tag_ABI_stack_align_preserved, 0\n"); | |
413 | ||
414 | #if 0 /* FIXME: Reenable when TI's tools are fixed. */ | |
415 | /* ??? Ideally we'd check flag_short_wchar somehow. */ | |
416 | asm_fprintf (asm_out_file, "\t.c6xabi_attribute Tag_ABI_wchar_t, %d\n", 2); | |
417 | #endif | |
418 | ||
419 | /* We conform to version 1.0 of the ABI. */ | |
420 | asm_fprintf (asm_out_file, | |
421 | "\t.c6xabi_attribute Tag_ABI_conformance, \"1.0\"\n"); | |
422 | ||
423 | } | |
424 | ||
425 | /* The LTO frontend only enables exceptions when it sees a function that | |
426 | uses it. This changes the return value of dwarf2out_do_frame, so we | |
427 | have to check before every function. */ | |
428 | ||
429 | void | |
430 | c6x_output_file_unwind (FILE * f) | |
431 | { | |
432 | if (done_cfi_sections) | |
433 | return; | |
434 | ||
7e5fc0c4 | 435 | /* Output a .cfi_sections directive. */ |
436 | if (dwarf2out_do_frame ()) | |
5aa04b01 | 437 | { |
7e5fc0c4 | 438 | if (flag_unwind_tables || flag_exceptions) |
439 | { | |
440 | if (write_symbols == DWARF2_DEBUG | |
441 | || write_symbols == VMS_AND_DWARF2_DEBUG) | |
442 | asm_fprintf (f, "\t.cfi_sections .debug_frame, .c6xabi.exidx\n"); | |
443 | else | |
444 | asm_fprintf (f, "\t.cfi_sections .c6xabi.exidx\n"); | |
445 | } | |
446 | else | |
447 | asm_fprintf (f, "\t.cfi_sections .debug_frame\n"); | |
5aa04b01 | 448 | done_cfi_sections = true; |
449 | } | |
450 | } | |
451 | ||
452 | /* Output unwind directives at the end of a function. */ | |
453 | ||
454 | static void | |
455 | c6x_output_fn_unwind (FILE * f) | |
456 | { | |
457 | /* Return immediately if we are not generating unwinding tables. */ | |
458 | if (! (flag_unwind_tables || flag_exceptions)) | |
459 | return; | |
460 | ||
461 | /* If this function will never be unwound, then mark it as such. */ | |
462 | if (!(flag_unwind_tables || crtl->uses_eh_lsda) | |
463 | && (TREE_NOTHROW (current_function_decl) | |
464 | || crtl->all_throwers_are_sibcalls)) | |
465 | fputs("\t.cantunwind\n", f); | |
466 | ||
467 | fputs ("\t.endp\n", f); | |
468 | } | |
469 | ||
470 | \f | |
471 | /* Stack and Calling. */ | |
472 | ||
473 | int argument_registers[10] = | |
474 | { | |
475 | REG_A4, REG_B4, | |
476 | REG_A6, REG_B6, | |
477 | REG_A8, REG_B8, | |
478 | REG_A10, REG_B10, | |
479 | REG_A12, REG_B12 | |
480 | }; | |
481 | ||
482 | /* Implements the macro INIT_CUMULATIVE_ARGS defined in c6x.h. */ | |
483 | ||
484 | void | |
485 | c6x_init_cumulative_args (CUMULATIVE_ARGS *cum, const_tree fntype, rtx libname, | |
486 | int n_named_args ATTRIBUTE_UNUSED) | |
487 | { | |
488 | cum->count = 0; | |
489 | cum->nregs = 10; | |
490 | if (!libname && fntype) | |
491 | { | |
492 | /* We need to find out the number of named arguments. Unfortunately, | |
493 | for incoming arguments, N_NAMED_ARGS is set to -1. */ | |
494 | if (stdarg_p (fntype)) | |
495 | cum->nregs = type_num_arguments (fntype) - 1; | |
496 | if (cum->nregs > 10) | |
497 | cum->nregs = 10; | |
498 | } | |
499 | } | |
500 | ||
501 | /* Implements the macro FUNCTION_ARG defined in c6x.h. */ | |
502 | ||
503 | static rtx | |
3754d046 | 504 | c6x_function_arg (cumulative_args_t cum_v, machine_mode mode, |
5aa04b01 | 505 | const_tree type, bool named ATTRIBUTE_UNUSED) |
506 | { | |
507 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); | |
508 | if (cum->count >= cum->nregs) | |
509 | return NULL_RTX; | |
510 | if (type) | |
511 | { | |
512 | HOST_WIDE_INT size = int_size_in_bytes (type); | |
513 | if (TARGET_BIG_ENDIAN && AGGREGATE_TYPE_P (type)) | |
514 | { | |
515 | if (size > 4) | |
516 | { | |
517 | rtx reg1 = gen_rtx_REG (SImode, argument_registers[cum->count] + 1); | |
518 | rtx reg2 = gen_rtx_REG (SImode, argument_registers[cum->count]); | |
519 | rtvec vec = gen_rtvec (2, gen_rtx_EXPR_LIST (VOIDmode, reg1, const0_rtx), | |
520 | gen_rtx_EXPR_LIST (VOIDmode, reg2, GEN_INT (4))); | |
521 | return gen_rtx_PARALLEL (mode, vec); | |
522 | } | |
523 | } | |
524 | } | |
525 | return gen_rtx_REG (mode, argument_registers[cum->count]); | |
526 | } | |
527 | ||
528 | static void | |
529 | c6x_function_arg_advance (cumulative_args_t cum_v, | |
3754d046 | 530 | machine_mode mode ATTRIBUTE_UNUSED, |
5aa04b01 | 531 | const_tree type ATTRIBUTE_UNUSED, |
532 | bool named ATTRIBUTE_UNUSED) | |
533 | { | |
534 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); | |
535 | cum->count++; | |
536 | } | |
537 | ||
538 | ||
539 | /* Return true if BLOCK_REG_PADDING (MODE, TYPE, FIRST) should return | |
540 | upward rather than downward. */ | |
541 | ||
542 | bool | |
3754d046 | 543 | c6x_block_reg_pad_upward (machine_mode mode ATTRIBUTE_UNUSED, |
5aa04b01 | 544 | const_tree type, bool first) |
545 | { | |
546 | HOST_WIDE_INT size; | |
547 | ||
548 | if (!TARGET_BIG_ENDIAN) | |
549 | return true; | |
550 | if (!first) | |
551 | return true; | |
552 | if (!type) | |
553 | return true; | |
554 | size = int_size_in_bytes (type); | |
555 | return size == 3; | |
556 | } | |
557 | ||
558 | /* Implement TARGET_FUNCTION_ARG_BOUNDARY. */ | |
559 | ||
560 | static unsigned int | |
3754d046 | 561 | c6x_function_arg_boundary (machine_mode mode, const_tree type) |
5aa04b01 | 562 | { |
563 | unsigned int boundary = type ? TYPE_ALIGN (type) : GET_MODE_BITSIZE (mode); | |
564 | ||
565 | if (boundary > BITS_PER_WORD) | |
566 | return 2 * BITS_PER_WORD; | |
567 | ||
568 | if (mode == BLKmode) | |
569 | { | |
570 | HOST_WIDE_INT size = int_size_in_bytes (type); | |
571 | if (size > 4) | |
572 | return 2 * BITS_PER_WORD; | |
573 | if (boundary < BITS_PER_WORD) | |
574 | { | |
575 | if (size >= 3) | |
576 | return BITS_PER_WORD; | |
577 | if (size >= 2) | |
578 | return 2 * BITS_PER_UNIT; | |
579 | } | |
580 | } | |
581 | return boundary; | |
582 | } | |
583 | ||
584 | /* Implement TARGET_FUNCTION_ARG_ROUND_BOUNDARY. */ | |
585 | static unsigned int | |
3754d046 | 586 | c6x_function_arg_round_boundary (machine_mode mode, const_tree type) |
5aa04b01 | 587 | { |
588 | return c6x_function_arg_boundary (mode, type); | |
589 | } | |
590 | ||
591 | /* TARGET_FUNCTION_VALUE implementation. Returns an RTX representing the place | |
592 | where function FUNC returns or receives a value of data type TYPE. */ | |
593 | ||
594 | static rtx | |
595 | c6x_function_value (const_tree type, const_tree func ATTRIBUTE_UNUSED, | |
596 | bool outgoing ATTRIBUTE_UNUSED) | |
597 | { | |
598 | /* Functions return values in register A4. When returning aggregates, we may | |
599 | have to adjust for endianness. */ | |
600 | if (TARGET_BIG_ENDIAN && type && AGGREGATE_TYPE_P (type)) | |
601 | { | |
602 | HOST_WIDE_INT size = int_size_in_bytes (type); | |
603 | if (size > 4) | |
604 | { | |
605 | ||
606 | rtx reg1 = gen_rtx_REG (SImode, REG_A4 + 1); | |
607 | rtx reg2 = gen_rtx_REG (SImode, REG_A4); | |
608 | rtvec vec = gen_rtvec (2, gen_rtx_EXPR_LIST (VOIDmode, reg1, const0_rtx), | |
609 | gen_rtx_EXPR_LIST (VOIDmode, reg2, GEN_INT (4))); | |
610 | return gen_rtx_PARALLEL (TYPE_MODE (type), vec); | |
611 | } | |
612 | } | |
613 | return gen_rtx_REG (TYPE_MODE (type), REG_A4); | |
614 | } | |
615 | ||
616 | /* Implement TARGET_LIBCALL_VALUE. */ | |
617 | ||
618 | static rtx | |
3754d046 | 619 | c6x_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
5aa04b01 | 620 | { |
621 | return gen_rtx_REG (mode, REG_A4); | |
622 | } | |
623 | ||
624 | /* TARGET_STRUCT_VALUE_RTX implementation. */ | |
625 | ||
626 | static rtx | |
627 | c6x_struct_value_rtx (tree type ATTRIBUTE_UNUSED, int incoming ATTRIBUTE_UNUSED) | |
628 | { | |
629 | return gen_rtx_REG (Pmode, REG_A3); | |
630 | } | |
631 | ||
632 | /* Implement TARGET_FUNCTION_VALUE_REGNO_P. */ | |
633 | ||
634 | static bool | |
635 | c6x_function_value_regno_p (const unsigned int regno) | |
636 | { | |
637 | return regno == REG_A4; | |
638 | } | |
639 | ||
640 | /* Types larger than 64 bit, and variable sized types, are passed by | |
641 | reference. The callee must copy them; see c6x_callee_copies. */ | |
642 | ||
643 | static bool | |
644 | c6x_pass_by_reference (cumulative_args_t cum_v ATTRIBUTE_UNUSED, | |
3754d046 | 645 | machine_mode mode, const_tree type, |
5aa04b01 | 646 | bool named ATTRIBUTE_UNUSED) |
647 | { | |
648 | int size = -1; | |
649 | if (type) | |
650 | size = int_size_in_bytes (type); | |
651 | else if (mode != VOIDmode) | |
652 | size = GET_MODE_SIZE (mode); | |
653 | return size > 2 * UNITS_PER_WORD || size == -1; | |
654 | } | |
655 | ||
656 | /* Decide whether a type should be returned in memory (true) | |
657 | or in a register (false). This is called by the macro | |
658 | TARGET_RETURN_IN_MEMORY. */ | |
659 | ||
660 | static bool | |
661 | c6x_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) | |
662 | { | |
663 | int size = int_size_in_bytes (type); | |
664 | return size > 2 * UNITS_PER_WORD || size == -1; | |
665 | } | |
666 | ||
667 | /* Values which must be returned in the most-significant end of the return | |
668 | register. */ | |
669 | ||
670 | static bool | |
671 | c6x_return_in_msb (const_tree valtype) | |
672 | { | |
673 | HOST_WIDE_INT size = int_size_in_bytes (valtype); | |
674 | return TARGET_BIG_ENDIAN && AGGREGATE_TYPE_P (valtype) && size == 3; | |
675 | } | |
676 | ||
677 | /* Implement TARGET_CALLEE_COPIES. */ | |
678 | ||
679 | static bool | |
680 | c6x_callee_copies (cumulative_args_t cum_v ATTRIBUTE_UNUSED, | |
3754d046 | 681 | machine_mode mode ATTRIBUTE_UNUSED, |
5aa04b01 | 682 | const_tree type ATTRIBUTE_UNUSED, |
683 | bool named ATTRIBUTE_UNUSED) | |
684 | { | |
685 | return true; | |
686 | } | |
687 | ||
688 | /* Return the type to use as __builtin_va_list. */ | |
689 | static tree | |
690 | c6x_build_builtin_va_list (void) | |
691 | { | |
692 | return build_pointer_type (char_type_node); | |
693 | } | |
694 | \f | |
695 | static void | |
696 | c6x_asm_trampoline_template (FILE *f) | |
697 | { | |
698 | fprintf (f, "\t.long\t0x0000002b\n"); /* mvkl .s2 fnlow,B0 */ | |
699 | fprintf (f, "\t.long\t0x01000028\n"); /* || mvkl .s1 sclow,A2 */ | |
700 | fprintf (f, "\t.long\t0x0000006b\n"); /* mvkh .s2 fnhigh,B0 */ | |
701 | fprintf (f, "\t.long\t0x01000068\n"); /* || mvkh .s1 schigh,A2 */ | |
702 | fprintf (f, "\t.long\t0x00000362\n"); /* b .s2 B0 */ | |
703 | fprintf (f, "\t.long\t0x00008000\n"); /* nop 5 */ | |
704 | fprintf (f, "\t.long\t0x00000000\n"); /* nop */ | |
705 | fprintf (f, "\t.long\t0x00000000\n"); /* nop */ | |
706 | } | |
707 | ||
708 | /* Emit RTL insns to initialize the variable parts of a trampoline at | |
709 | TRAMP. FNADDR is an RTX for the address of the function's pure | |
710 | code. CXT is an RTX for the static chain value for the function. */ | |
711 | ||
712 | static void | |
713 | c6x_initialize_trampoline (rtx tramp, tree fndecl, rtx cxt) | |
714 | { | |
715 | rtx fnaddr = XEXP (DECL_RTL (fndecl), 0); | |
716 | rtx t1 = copy_to_reg (fnaddr); | |
717 | rtx t2 = copy_to_reg (cxt); | |
718 | rtx mask = gen_reg_rtx (SImode); | |
719 | int i; | |
720 | ||
721 | emit_block_move (tramp, assemble_trampoline_template (), | |
722 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
723 | ||
724 | emit_move_insn (mask, GEN_INT (0xffff << 7)); | |
725 | ||
726 | for (i = 0; i < 4; i++) | |
727 | { | |
728 | rtx mem = adjust_address (tramp, SImode, i * 4); | |
729 | rtx t = (i & 1) ? t2 : t1; | |
730 | rtx v1 = gen_reg_rtx (SImode); | |
731 | rtx v2 = gen_reg_rtx (SImode); | |
732 | emit_move_insn (v1, mem); | |
733 | if (i < 2) | |
734 | emit_insn (gen_ashlsi3 (v2, t, GEN_INT (7))); | |
735 | else | |
736 | emit_insn (gen_lshrsi3 (v2, t, GEN_INT (9))); | |
737 | emit_insn (gen_andsi3 (v2, v2, mask)); | |
738 | emit_insn (gen_iorsi3 (v2, v2, v1)); | |
739 | emit_move_insn (mem, v2); | |
740 | } | |
741 | #ifdef CLEAR_INSN_CACHE | |
742 | tramp = XEXP (tramp, 0); | |
743 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__gnu_clear_cache"), | |
9e9e5c15 | 744 | LCT_NORMAL, VOIDmode, tramp, Pmode, |
745 | plus_constant (Pmode, tramp, TRAMPOLINE_SIZE), Pmode); | |
5aa04b01 | 746 | #endif |
747 | } | |
748 | \f | |
749 | /* Determine whether c6x_output_mi_thunk can succeed. */ | |
750 | ||
751 | static bool | |
752 | c6x_can_output_mi_thunk (const_tree thunk ATTRIBUTE_UNUSED, | |
753 | HOST_WIDE_INT delta ATTRIBUTE_UNUSED, | |
754 | HOST_WIDE_INT vcall_offset ATTRIBUTE_UNUSED, | |
755 | const_tree function ATTRIBUTE_UNUSED) | |
756 | { | |
757 | return !TARGET_LONG_CALLS; | |
758 | } | |
759 | ||
760 | /* Output the assembler code for a thunk function. THUNK is the | |
761 | declaration for the thunk function itself, FUNCTION is the decl for | |
762 | the target function. DELTA is an immediate constant offset to be | |
763 | added to THIS. If VCALL_OFFSET is nonzero, the word at | |
764 | *(*this + vcall_offset) should be added to THIS. */ | |
765 | ||
766 | static void | |
767 | c6x_output_mi_thunk (FILE *file ATTRIBUTE_UNUSED, | |
768 | tree thunk ATTRIBUTE_UNUSED, HOST_WIDE_INT delta, | |
769 | HOST_WIDE_INT vcall_offset, tree function) | |
770 | { | |
771 | rtx xops[5]; | |
772 | /* The this parameter is passed as the first argument. */ | |
773 | rtx this_rtx = gen_rtx_REG (Pmode, REG_A4); | |
774 | ||
de089fe5 | 775 | c6x_current_insn = NULL; |
5aa04b01 | 776 | |
777 | xops[4] = XEXP (DECL_RTL (function), 0); | |
778 | if (!vcall_offset) | |
779 | { | |
780 | output_asm_insn ("b .s2 \t%4", xops); | |
781 | if (!delta) | |
782 | output_asm_insn ("nop 5", xops); | |
783 | } | |
784 | ||
785 | /* Adjust the this parameter by a fixed constant. */ | |
786 | if (delta) | |
787 | { | |
788 | xops[0] = GEN_INT (delta); | |
789 | xops[1] = this_rtx; | |
790 | if (delta >= -16 && delta <= 15) | |
791 | { | |
792 | output_asm_insn ("add .s1 %0, %1, %1", xops); | |
793 | if (!vcall_offset) | |
794 | output_asm_insn ("nop 4", xops); | |
795 | } | |
796 | else if (delta >= 16 && delta < 32) | |
797 | { | |
798 | output_asm_insn ("add .d1 %0, %1, %1", xops); | |
799 | if (!vcall_offset) | |
800 | output_asm_insn ("nop 4", xops); | |
801 | } | |
802 | else if (delta >= -32768 && delta < 32768) | |
803 | { | |
804 | output_asm_insn ("mvk .s1 %0, A0", xops); | |
805 | output_asm_insn ("add .d1 %1, A0, %1", xops); | |
806 | if (!vcall_offset) | |
807 | output_asm_insn ("nop 3", xops); | |
808 | } | |
809 | else | |
810 | { | |
811 | output_asm_insn ("mvkl .s1 %0, A0", xops); | |
812 | output_asm_insn ("mvkh .s1 %0, A0", xops); | |
813 | output_asm_insn ("add .d1 %1, A0, %1", xops); | |
814 | if (!vcall_offset) | |
815 | output_asm_insn ("nop 3", xops); | |
816 | } | |
817 | } | |
818 | ||
819 | /* Adjust the this parameter by a value stored in the vtable. */ | |
820 | if (vcall_offset) | |
821 | { | |
822 | rtx a0tmp = gen_rtx_REG (Pmode, REG_A0); | |
823 | rtx a3tmp = gen_rtx_REG (Pmode, REG_A3); | |
824 | ||
825 | xops[1] = a3tmp; | |
826 | xops[2] = a0tmp; | |
827 | xops[3] = gen_rtx_MEM (Pmode, a0tmp); | |
828 | output_asm_insn ("mv .s1 a4, %2", xops); | |
829 | output_asm_insn ("ldw .d1t1 %3, %2", xops); | |
830 | ||
831 | /* Adjust the this parameter. */ | |
29c05e22 | 832 | xops[0] = gen_rtx_MEM (Pmode, plus_constant (Pmode, a0tmp, |
833 | vcall_offset)); | |
5aa04b01 | 834 | if (!memory_operand (xops[0], Pmode)) |
835 | { | |
836 | rtx tmp2 = gen_rtx_REG (Pmode, REG_A1); | |
837 | xops[0] = GEN_INT (vcall_offset); | |
838 | xops[1] = tmp2; | |
839 | output_asm_insn ("mvkl .s1 %0, %1", xops); | |
840 | output_asm_insn ("mvkh .s1 %0, %1", xops); | |
841 | output_asm_insn ("nop 2", xops); | |
842 | output_asm_insn ("add .d1 %2, %1, %2", xops); | |
843 | xops[0] = gen_rtx_MEM (Pmode, a0tmp); | |
844 | } | |
845 | else | |
846 | output_asm_insn ("nop 4", xops); | |
847 | xops[2] = this_rtx; | |
848 | output_asm_insn ("ldw .d1t1 %0, %1", xops); | |
849 | output_asm_insn ("|| b .s2 \t%4", xops); | |
850 | output_asm_insn ("nop 4", xops); | |
851 | output_asm_insn ("add .d1 %2, %1, %2", xops); | |
852 | } | |
853 | } | |
854 | \f | |
855 | /* Return true if EXP goes in small data/bss. */ | |
856 | ||
857 | static bool | |
858 | c6x_in_small_data_p (const_tree exp) | |
859 | { | |
860 | /* We want to merge strings, so we never consider them small data. */ | |
861 | if (TREE_CODE (exp) == STRING_CST) | |
862 | return false; | |
863 | ||
864 | /* Functions are never small data. */ | |
865 | if (TREE_CODE (exp) == FUNCTION_DECL) | |
866 | return false; | |
867 | ||
868 | if (TREE_CODE (exp) == VAR_DECL && DECL_WEAK (exp)) | |
869 | return false; | |
870 | ||
871 | if (TREE_CODE (exp) == VAR_DECL && DECL_SECTION_NAME (exp)) | |
872 | { | |
738a6bda | 873 | const char *section = DECL_SECTION_NAME (exp); |
5aa04b01 | 874 | |
875 | if (strcmp (section, ".neardata") == 0 | |
876 | || strncmp (section, ".neardata.", 10) == 0 | |
877 | || strncmp (section, ".gnu.linkonce.s.", 16) == 0 | |
878 | || strcmp (section, ".bss") == 0 | |
879 | || strncmp (section, ".bss.", 5) == 0 | |
880 | || strncmp (section, ".gnu.linkonce.sb.", 17) == 0 | |
881 | || strcmp (section, ".rodata") == 0 | |
882 | || strncmp (section, ".rodata.", 8) == 0 | |
883 | || strncmp (section, ".gnu.linkonce.s2.", 17) == 0) | |
884 | return true; | |
885 | } | |
886 | else | |
887 | return PLACE_IN_SDATA_P (exp); | |
888 | ||
889 | return false; | |
890 | } | |
891 | ||
892 | /* Return a section for X. The only special thing we do here is to | |
893 | honor small data. We don't have a tree type, so we can't use the | |
894 | PLACE_IN_SDATA_P macro we use everywhere else; we choose to place | |
895 | everything sized 8 bytes or smaller into small data. */ | |
896 | ||
897 | static section * | |
3754d046 | 898 | c6x_select_rtx_section (machine_mode mode, rtx x, |
5aa04b01 | 899 | unsigned HOST_WIDE_INT align) |
900 | { | |
901 | if (c6x_sdata_mode == C6X_SDATA_ALL | |
902 | || (c6x_sdata_mode != C6X_SDATA_NONE && GET_MODE_SIZE (mode) <= 8)) | |
903 | /* ??? Consider using mergeable sdata sections. */ | |
904 | return sdata_section; | |
905 | else | |
906 | return default_elf_select_rtx_section (mode, x, align); | |
907 | } | |
908 | ||
909 | static section * | |
910 | c6x_elf_select_section (tree decl, int reloc, | |
911 | unsigned HOST_WIDE_INT align) | |
912 | { | |
913 | const char *sname = NULL; | |
914 | unsigned int flags = SECTION_WRITE; | |
915 | if (c6x_in_small_data_p (decl)) | |
916 | { | |
917 | switch (categorize_decl_for_section (decl, reloc)) | |
918 | { | |
919 | case SECCAT_SRODATA: | |
920 | sname = ".rodata"; | |
921 | flags = 0; | |
922 | break; | |
923 | case SECCAT_SDATA: | |
924 | sname = ".neardata"; | |
925 | break; | |
926 | case SECCAT_SBSS: | |
927 | sname = ".bss"; | |
928 | flags |= SECTION_BSS; | |
929 | default: | |
930 | break; | |
931 | } | |
932 | } | |
933 | else | |
934 | { | |
935 | switch (categorize_decl_for_section (decl, reloc)) | |
936 | { | |
937 | case SECCAT_DATA: | |
938 | sname = ".fardata"; | |
939 | break; | |
940 | case SECCAT_DATA_REL: | |
941 | sname = ".fardata.rel"; | |
942 | break; | |
943 | case SECCAT_DATA_REL_LOCAL: | |
944 | sname = ".fardata.rel.local"; | |
945 | break; | |
946 | case SECCAT_DATA_REL_RO: | |
947 | sname = ".fardata.rel.ro"; | |
948 | break; | |
949 | case SECCAT_DATA_REL_RO_LOCAL: | |
950 | sname = ".fardata.rel.ro.local"; | |
951 | break; | |
952 | case SECCAT_BSS: | |
953 | sname = ".far"; | |
954 | flags |= SECTION_BSS; | |
955 | break; | |
956 | case SECCAT_RODATA: | |
957 | sname = ".const"; | |
958 | flags = 0; | |
959 | break; | |
960 | case SECCAT_SRODATA: | |
961 | case SECCAT_SDATA: | |
962 | case SECCAT_SBSS: | |
963 | gcc_unreachable (); | |
964 | default: | |
965 | break; | |
966 | } | |
967 | } | |
968 | if (sname) | |
969 | { | |
970 | /* We might get called with string constants, but get_named_section | |
971 | doesn't like them as they are not DECLs. Also, we need to set | |
972 | flags in that case. */ | |
973 | if (!DECL_P (decl)) | |
974 | return get_section (sname, flags, NULL); | |
975 | return get_named_section (decl, sname, reloc); | |
976 | } | |
977 | ||
978 | return default_elf_select_section (decl, reloc, align); | |
979 | } | |
980 | ||
981 | /* Build up a unique section name, expressed as a | |
982 | STRING_CST node, and assign it to DECL_SECTION_NAME (decl). | |
983 | RELOC indicates whether the initial value of EXP requires | |
984 | link-time relocations. */ | |
985 | ||
986 | static void ATTRIBUTE_UNUSED | |
987 | c6x_elf_unique_section (tree decl, int reloc) | |
988 | { | |
989 | const char *prefix = NULL; | |
990 | /* We only need to use .gnu.linkonce if we don't have COMDAT groups. */ | |
b395f451 | 991 | bool one_only = DECL_COMDAT_GROUP (decl) && !HAVE_COMDAT_GROUP; |
5aa04b01 | 992 | |
993 | if (c6x_in_small_data_p (decl)) | |
994 | { | |
995 | switch (categorize_decl_for_section (decl, reloc)) | |
996 | { | |
997 | case SECCAT_SDATA: | |
998 | prefix = one_only ? ".s" : ".neardata"; | |
999 | break; | |
1000 | case SECCAT_SBSS: | |
1001 | prefix = one_only ? ".sb" : ".bss"; | |
1002 | break; | |
1003 | case SECCAT_SRODATA: | |
1004 | prefix = one_only ? ".s2" : ".rodata"; | |
1005 | break; | |
1006 | case SECCAT_RODATA_MERGE_STR: | |
1007 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1008 | case SECCAT_RODATA_MERGE_CONST: | |
1009 | case SECCAT_RODATA: | |
1010 | case SECCAT_DATA: | |
1011 | case SECCAT_DATA_REL: | |
1012 | case SECCAT_DATA_REL_LOCAL: | |
1013 | case SECCAT_DATA_REL_RO: | |
1014 | case SECCAT_DATA_REL_RO_LOCAL: | |
1015 | gcc_unreachable (); | |
1016 | default: | |
1017 | /* Everything else we place into default sections and hope for the | |
1018 | best. */ | |
1019 | break; | |
1020 | } | |
1021 | } | |
1022 | else | |
1023 | { | |
1024 | switch (categorize_decl_for_section (decl, reloc)) | |
1025 | { | |
1026 | case SECCAT_DATA: | |
1027 | case SECCAT_DATA_REL: | |
1028 | case SECCAT_DATA_REL_LOCAL: | |
1029 | case SECCAT_DATA_REL_RO: | |
1030 | case SECCAT_DATA_REL_RO_LOCAL: | |
1031 | prefix = one_only ? ".fd" : ".fardata"; | |
1032 | break; | |
1033 | case SECCAT_BSS: | |
1034 | prefix = one_only ? ".fb" : ".far"; | |
1035 | break; | |
1036 | case SECCAT_RODATA: | |
1037 | case SECCAT_RODATA_MERGE_STR: | |
1038 | case SECCAT_RODATA_MERGE_STR_INIT: | |
1039 | case SECCAT_RODATA_MERGE_CONST: | |
1040 | prefix = one_only ? ".fr" : ".const"; | |
1041 | break; | |
1042 | case SECCAT_SRODATA: | |
1043 | case SECCAT_SDATA: | |
1044 | case SECCAT_SBSS: | |
1045 | gcc_unreachable (); | |
1046 | default: | |
1047 | break; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | if (prefix) | |
1052 | { | |
1053 | const char *name, *linkonce; | |
1054 | char *string; | |
1055 | ||
1056 | name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); | |
1057 | name = targetm.strip_name_encoding (name); | |
1058 | ||
1059 | /* If we're using one_only, then there needs to be a .gnu.linkonce | |
1060 | prefix to the section name. */ | |
1061 | linkonce = one_only ? ".gnu.linkonce" : ""; | |
1062 | ||
1063 | string = ACONCAT ((linkonce, prefix, ".", name, NULL)); | |
1064 | ||
738a6bda | 1065 | set_decl_section_name (decl, string); |
5aa04b01 | 1066 | return; |
1067 | } | |
1068 | default_unique_section (decl, reloc); | |
1069 | } | |
1070 | ||
1071 | static unsigned int | |
1072 | c6x_section_type_flags (tree decl, const char *name, int reloc) | |
1073 | { | |
1074 | unsigned int flags = 0; | |
1075 | ||
1076 | if (strcmp (name, ".far") == 0 | |
1077 | || strncmp (name, ".far.", 5) == 0) | |
1078 | flags |= SECTION_BSS; | |
1079 | ||
1080 | flags |= default_section_type_flags (decl, name, reloc); | |
1081 | ||
1082 | return flags; | |
1083 | } | |
1084 | \f | |
1085 | /* Checks whether the given CALL_EXPR would use a caller saved | |
1086 | register. This is used to decide whether sibling call optimization | |
1087 | could be performed on the respective function call. */ | |
1088 | ||
1089 | static bool | |
1090 | c6x_call_saved_register_used (tree call_expr) | |
1091 | { | |
1092 | CUMULATIVE_ARGS cum_v; | |
1093 | cumulative_args_t cum; | |
1094 | HARD_REG_SET call_saved_regset; | |
1095 | tree parameter; | |
3754d046 | 1096 | machine_mode mode; |
5aa04b01 | 1097 | tree type; |
1098 | rtx parm_rtx; | |
1099 | int i; | |
1100 | ||
1101 | INIT_CUMULATIVE_ARGS (cum_v, NULL, NULL, 0, 0); | |
1102 | cum = pack_cumulative_args (&cum_v); | |
1103 | ||
1104 | COMPL_HARD_REG_SET (call_saved_regset, call_used_reg_set); | |
1105 | for (i = 0; i < call_expr_nargs (call_expr); i++) | |
1106 | { | |
1107 | parameter = CALL_EXPR_ARG (call_expr, i); | |
1108 | gcc_assert (parameter); | |
1109 | ||
1110 | /* For an undeclared variable passed as parameter we will get | |
1111 | an ERROR_MARK node here. */ | |
1112 | if (TREE_CODE (parameter) == ERROR_MARK) | |
1113 | return true; | |
1114 | ||
1115 | type = TREE_TYPE (parameter); | |
1116 | gcc_assert (type); | |
1117 | ||
1118 | mode = TYPE_MODE (type); | |
1119 | gcc_assert (mode); | |
1120 | ||
1121 | if (pass_by_reference (&cum_v, mode, type, true)) | |
1122 | { | |
1123 | mode = Pmode; | |
1124 | type = build_pointer_type (type); | |
1125 | } | |
1126 | ||
1127 | parm_rtx = c6x_function_arg (cum, mode, type, 0); | |
1128 | ||
1129 | c6x_function_arg_advance (cum, mode, type, 0); | |
1130 | ||
1131 | if (!parm_rtx) | |
1132 | continue; | |
1133 | ||
1134 | if (REG_P (parm_rtx) | |
1135 | && overlaps_hard_reg_set_p (call_saved_regset, GET_MODE (parm_rtx), | |
1136 | REGNO (parm_rtx))) | |
1137 | return true; | |
1138 | if (GET_CODE (parm_rtx) == PARALLEL) | |
1139 | { | |
1140 | int n = XVECLEN (parm_rtx, 0); | |
1141 | while (n-- > 0) | |
1142 | { | |
1143 | rtx x = XEXP (XVECEXP (parm_rtx, 0, n), 0); | |
1144 | if (REG_P (x) | |
1145 | && overlaps_hard_reg_set_p (call_saved_regset, | |
1146 | GET_MODE (x), REGNO (x))) | |
1147 | return true; | |
1148 | } | |
1149 | } | |
1150 | } | |
1151 | return false; | |
1152 | } | |
1153 | ||
1154 | /* Decide whether we can make a sibling call to a function. DECL is the | |
1155 | declaration of the function being targeted by the call and EXP is the | |
1156 | CALL_EXPR representing the call. */ | |
1157 | ||
1158 | static bool | |
1159 | c6x_function_ok_for_sibcall (tree decl, tree exp) | |
1160 | { | |
1161 | /* Registers A10, A12, B10 and B12 are available as arguments | |
1162 | register but unfortunately caller saved. This makes functions | |
1163 | needing these registers for arguments not suitable for | |
1164 | sibcalls. */ | |
1165 | if (c6x_call_saved_register_used (exp)) | |
1166 | return false; | |
1167 | ||
1168 | if (!flag_pic) | |
1169 | return true; | |
1170 | ||
1171 | if (TARGET_DSBT) | |
1172 | { | |
1173 | /* When compiling for DSBT, the calling function must be local, | |
1174 | so that when we reload B14 in the sibcall epilogue, it will | |
1175 | not change its value. */ | |
1176 | struct cgraph_local_info *this_func; | |
1177 | ||
1178 | if (!decl) | |
1179 | /* Not enough information. */ | |
1180 | return false; | |
1181 | ||
35ee1c66 | 1182 | this_func = cgraph_node::local_info (current_function_decl); |
5aa04b01 | 1183 | return this_func->local; |
1184 | } | |
1185 | ||
1186 | return true; | |
1187 | } | |
1188 | ||
1189 | /* Return true if DECL is known to be linked into section SECTION. */ | |
1190 | ||
1191 | static bool | |
1192 | c6x_function_in_section_p (tree decl, section *section) | |
1193 | { | |
1194 | /* We can only be certain about functions defined in the same | |
1195 | compilation unit. */ | |
1196 | if (!TREE_STATIC (decl)) | |
1197 | return false; | |
1198 | ||
1199 | /* Make sure that SYMBOL always binds to the definition in this | |
1200 | compilation unit. */ | |
1201 | if (!targetm.binds_local_p (decl)) | |
1202 | return false; | |
1203 | ||
1204 | /* If DECL_SECTION_NAME is set, assume it is trustworthy. */ | |
1205 | if (!DECL_SECTION_NAME (decl)) | |
1206 | { | |
1207 | /* Make sure that we will not create a unique section for DECL. */ | |
b395f451 | 1208 | if (flag_function_sections || DECL_COMDAT_GROUP (decl)) |
5aa04b01 | 1209 | return false; |
1210 | } | |
1211 | ||
1212 | return function_section (decl) == section; | |
1213 | } | |
1214 | ||
1215 | /* Return true if a call to OP, which is a SYMBOL_REF, must be expanded | |
1216 | as a long call. */ | |
1217 | bool | |
1218 | c6x_long_call_p (rtx op) | |
1219 | { | |
1220 | tree decl; | |
1221 | ||
1222 | if (!TARGET_LONG_CALLS) | |
1223 | return false; | |
1224 | ||
1225 | decl = SYMBOL_REF_DECL (op); | |
1226 | ||
1227 | /* Try to determine whether the symbol is in the same section as the current | |
1228 | function. Be conservative, and only cater for cases in which the | |
1229 | whole of the current function is placed in the same section. */ | |
1230 | if (decl != NULL_TREE | |
1231 | && !flag_reorder_blocks_and_partition | |
1232 | && TREE_CODE (decl) == FUNCTION_DECL | |
1233 | && c6x_function_in_section_p (decl, current_function_section ())) | |
1234 | return false; | |
1235 | ||
1236 | return true; | |
1237 | } | |
1238 | ||
1239 | /* Emit the sequence for a call. */ | |
1240 | void | |
1241 | c6x_expand_call (rtx retval, rtx address, bool sibcall) | |
1242 | { | |
1243 | rtx callee = XEXP (address, 0); | |
1244 | rtx call_insn; | |
1245 | ||
1246 | if (!c6x_call_operand (callee, Pmode)) | |
1247 | { | |
1248 | callee = force_reg (Pmode, callee); | |
1249 | address = change_address (address, Pmode, callee); | |
1250 | } | |
1251 | call_insn = gen_rtx_CALL (VOIDmode, address, const0_rtx); | |
1252 | if (sibcall) | |
1253 | { | |
1254 | call_insn = emit_call_insn (call_insn); | |
1255 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), | |
1256 | gen_rtx_REG (Pmode, REG_B3)); | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | if (retval == NULL_RTX) | |
1261 | call_insn = emit_call_insn (call_insn); | |
1262 | else | |
d1f9b275 | 1263 | call_insn = emit_call_insn (gen_rtx_SET (retval, call_insn)); |
5aa04b01 | 1264 | } |
1265 | if (flag_pic) | |
1266 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), pic_offset_table_rtx); | |
1267 | } | |
1268 | ||
1269 | /* Legitimize PIC addresses. If the address is already position-independent, | |
1270 | we return ORIG. Newly generated position-independent addresses go into a | |
1271 | reg. This is REG if nonzero, otherwise we allocate register(s) as | |
1272 | necessary. PICREG is the register holding the pointer to the PIC offset | |
1273 | table. */ | |
1274 | ||
1275 | static rtx | |
1276 | legitimize_pic_address (rtx orig, rtx reg, rtx picreg) | |
1277 | { | |
1278 | rtx addr = orig; | |
1279 | rtx new_rtx = orig; | |
1280 | ||
1281 | if (GET_CODE (addr) == SYMBOL_REF || GET_CODE (addr) == LABEL_REF) | |
1282 | { | |
1283 | int unspec = UNSPEC_LOAD_GOT; | |
1284 | rtx tmp; | |
1285 | ||
1286 | if (reg == 0) | |
1287 | { | |
1288 | gcc_assert (can_create_pseudo_p ()); | |
1289 | reg = gen_reg_rtx (Pmode); | |
1290 | } | |
1291 | if (flag_pic == 2) | |
1292 | { | |
1293 | if (can_create_pseudo_p ()) | |
1294 | tmp = gen_reg_rtx (Pmode); | |
1295 | else | |
1296 | tmp = reg; | |
1297 | emit_insn (gen_movsi_gotoff_high (tmp, addr)); | |
1298 | emit_insn (gen_movsi_gotoff_lo_sum (tmp, tmp, addr)); | |
1299 | emit_insn (gen_load_got_gotoff (reg, picreg, tmp)); | |
1300 | } | |
1301 | else | |
1302 | { | |
1303 | tmp = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, addr), unspec); | |
1304 | new_rtx = gen_const_mem (Pmode, gen_rtx_PLUS (Pmode, picreg, tmp)); | |
1305 | ||
1306 | emit_move_insn (reg, new_rtx); | |
1307 | } | |
1308 | if (picreg == pic_offset_table_rtx) | |
1309 | crtl->uses_pic_offset_table = 1; | |
1310 | return reg; | |
1311 | } | |
1312 | ||
1313 | else if (GET_CODE (addr) == CONST || GET_CODE (addr) == PLUS) | |
1314 | { | |
1315 | rtx base; | |
1316 | ||
1317 | if (GET_CODE (addr) == CONST) | |
1318 | { | |
1319 | addr = XEXP (addr, 0); | |
1320 | gcc_assert (GET_CODE (addr) == PLUS); | |
1321 | } | |
1322 | ||
1323 | if (XEXP (addr, 0) == picreg) | |
1324 | return orig; | |
1325 | ||
1326 | if (reg == 0) | |
1327 | { | |
1328 | gcc_assert (can_create_pseudo_p ()); | |
1329 | reg = gen_reg_rtx (Pmode); | |
1330 | } | |
1331 | ||
1332 | base = legitimize_pic_address (XEXP (addr, 0), reg, picreg); | |
1333 | addr = legitimize_pic_address (XEXP (addr, 1), | |
1334 | base == reg ? NULL_RTX : reg, | |
1335 | picreg); | |
1336 | ||
1337 | if (GET_CODE (addr) == CONST_INT) | |
1338 | { | |
1339 | gcc_assert (! reload_in_progress && ! reload_completed); | |
1340 | addr = force_reg (Pmode, addr); | |
1341 | } | |
1342 | ||
1343 | if (GET_CODE (addr) == PLUS && CONSTANT_P (XEXP (addr, 1))) | |
1344 | { | |
1345 | base = gen_rtx_PLUS (Pmode, base, XEXP (addr, 0)); | |
1346 | addr = XEXP (addr, 1); | |
1347 | } | |
1348 | ||
1349 | return gen_rtx_PLUS (Pmode, base, addr); | |
1350 | } | |
1351 | ||
1352 | return new_rtx; | |
1353 | } | |
1354 | ||
1355 | /* Expand a move operation in mode MODE. The operands are in OPERANDS. | |
1356 | Returns true if no further code must be generated, false if the caller | |
1357 | should generate an insn to move OPERANDS[1] to OPERANDS[0]. */ | |
1358 | ||
1359 | bool | |
3754d046 | 1360 | expand_move (rtx *operands, machine_mode mode) |
5aa04b01 | 1361 | { |
1362 | rtx dest = operands[0]; | |
1363 | rtx op = operands[1]; | |
1364 | ||
1365 | if ((reload_in_progress | reload_completed) == 0 | |
1366 | && GET_CODE (dest) == MEM && GET_CODE (op) != REG) | |
1367 | operands[1] = force_reg (mode, op); | |
1368 | else if (mode == SImode && symbolic_operand (op, SImode)) | |
1369 | { | |
1370 | if (flag_pic) | |
1371 | { | |
1372 | if (sdata_symbolic_operand (op, SImode)) | |
1373 | { | |
1374 | emit_insn (gen_load_sdata_pic (dest, pic_offset_table_rtx, op)); | |
1375 | crtl->uses_pic_offset_table = 1; | |
1376 | return true; | |
1377 | } | |
1378 | else | |
1379 | { | |
1380 | rtx temp = (reload_completed || reload_in_progress | |
1381 | ? dest : gen_reg_rtx (Pmode)); | |
1382 | ||
1383 | operands[1] = legitimize_pic_address (op, temp, | |
1384 | pic_offset_table_rtx); | |
1385 | } | |
1386 | } | |
1387 | else if (reload_completed | |
1388 | && !sdata_symbolic_operand (op, SImode)) | |
1389 | { | |
1390 | emit_insn (gen_movsi_high (dest, op)); | |
1391 | emit_insn (gen_movsi_lo_sum (dest, dest, op)); | |
1392 | return true; | |
1393 | } | |
1394 | } | |
1395 | return false; | |
1396 | } | |
1397 | ||
1398 | /* This function is called when we're about to expand an integer compare | |
1399 | operation which performs COMPARISON. It examines the second operand, | |
1400 | and if it is an integer constant that cannot be used directly on the | |
1401 | current machine in a comparison insn, it returns true. */ | |
1402 | bool | |
1403 | c6x_force_op_for_comparison_p (enum rtx_code code, rtx op) | |
1404 | { | |
1405 | if (!CONST_INT_P (op) || satisfies_constraint_Iu4 (op)) | |
1406 | return false; | |
1407 | ||
1408 | if ((code == EQ || code == LT || code == GT) | |
1409 | && !satisfies_constraint_Is5 (op)) | |
1410 | return true; | |
1411 | if ((code == GTU || code == LTU) | |
1412 | && (!TARGET_INSNS_64 || !satisfies_constraint_Iu5 (op))) | |
1413 | return true; | |
1414 | ||
1415 | return false; | |
1416 | } | |
1417 | ||
1418 | /* Emit comparison instruction if necessary, returning the expression | |
1419 | that holds the compare result in the proper mode. Return the comparison | |
1420 | that should be used in the jump insn. */ | |
1421 | ||
1422 | rtx | |
3754d046 | 1423 | c6x_expand_compare (rtx comparison, machine_mode mode) |
5aa04b01 | 1424 | { |
1425 | enum rtx_code code = GET_CODE (comparison); | |
1426 | rtx op0 = XEXP (comparison, 0); | |
1427 | rtx op1 = XEXP (comparison, 1); | |
1428 | rtx cmp; | |
1429 | enum rtx_code jump_code = code; | |
3754d046 | 1430 | machine_mode op_mode = GET_MODE (op0); |
5aa04b01 | 1431 | |
1432 | if (op_mode == DImode && (code == NE || code == EQ) && op1 == const0_rtx) | |
1433 | { | |
1434 | rtx t = gen_reg_rtx (SImode); | |
1435 | emit_insn (gen_iorsi3 (t, gen_lowpart (SImode, op0), | |
1436 | gen_highpart (SImode, op0))); | |
1437 | op_mode = SImode; | |
1438 | cmp = t; | |
1439 | } | |
1440 | else if (op_mode == DImode) | |
1441 | { | |
1442 | rtx lo[2], high[2]; | |
1443 | rtx cmp1, cmp2; | |
1444 | ||
1445 | if (code == NE || code == GEU || code == LEU || code == GE || code == LE) | |
1446 | { | |
1447 | code = reverse_condition (code); | |
1448 | jump_code = EQ; | |
1449 | } | |
1450 | else | |
1451 | jump_code = NE; | |
1452 | ||
1453 | split_di (&op0, 1, lo, high); | |
1454 | split_di (&op1, 1, lo + 1, high + 1); | |
1455 | ||
1456 | if (c6x_force_op_for_comparison_p (code, high[1]) | |
1457 | || c6x_force_op_for_comparison_p (EQ, high[1])) | |
1458 | high[1] = force_reg (SImode, high[1]); | |
1459 | ||
1460 | cmp1 = gen_reg_rtx (SImode); | |
1461 | cmp2 = gen_reg_rtx (SImode); | |
d1f9b275 | 1462 | emit_insn (gen_rtx_SET (cmp1, gen_rtx_fmt_ee (code, SImode, |
1463 | high[0], high[1]))); | |
5aa04b01 | 1464 | if (code == EQ) |
1465 | { | |
1466 | if (c6x_force_op_for_comparison_p (code, lo[1])) | |
1467 | lo[1] = force_reg (SImode, lo[1]); | |
d1f9b275 | 1468 | emit_insn (gen_rtx_SET (cmp2, gen_rtx_fmt_ee (code, SImode, |
1469 | lo[0], lo[1]))); | |
5aa04b01 | 1470 | emit_insn (gen_andsi3 (cmp1, cmp1, cmp2)); |
1471 | } | |
1472 | else | |
1473 | { | |
d1f9b275 | 1474 | emit_insn (gen_rtx_SET (cmp2, gen_rtx_EQ (SImode, high[0], |
1475 | high[1]))); | |
5aa04b01 | 1476 | if (code == GT) |
1477 | code = GTU; | |
1478 | else if (code == LT) | |
1479 | code = LTU; | |
1480 | if (c6x_force_op_for_comparison_p (code, lo[1])) | |
1481 | lo[1] = force_reg (SImode, lo[1]); | |
1482 | emit_insn (gen_cmpsi_and (cmp2, gen_rtx_fmt_ee (code, SImode, | |
1483 | lo[0], lo[1]), | |
1484 | lo[0], lo[1], cmp2)); | |
1485 | emit_insn (gen_iorsi3 (cmp1, cmp1, cmp2)); | |
1486 | } | |
1487 | cmp = cmp1; | |
1488 | } | |
1489 | else if (TARGET_FP && !flag_finite_math_only | |
1490 | && (op_mode == DFmode || op_mode == SFmode) | |
1491 | && code != EQ && code != NE && code != LT && code != GT | |
1492 | && code != UNLE && code != UNGE) | |
1493 | { | |
1494 | enum rtx_code code1, code2, code3; | |
1495 | rtx (*fn) (rtx, rtx, rtx, rtx, rtx); | |
1496 | ||
1497 | jump_code = NE; | |
1498 | code3 = UNKNOWN; | |
1499 | switch (code) | |
1500 | { | |
1501 | case UNLT: | |
1502 | case UNGT: | |
1503 | jump_code = EQ; | |
1504 | /* fall through */ | |
1505 | case LE: | |
1506 | case GE: | |
1507 | code1 = code == LE || code == UNGT ? LT : GT; | |
1508 | code2 = EQ; | |
1509 | break; | |
1510 | ||
1511 | case UNORDERED: | |
1512 | jump_code = EQ; | |
1513 | /* fall through */ | |
1514 | case ORDERED: | |
1515 | code3 = EQ; | |
1516 | /* fall through */ | |
1517 | case LTGT: | |
1518 | code1 = LT; | |
1519 | code2 = GT; | |
1520 | break; | |
1521 | ||
1522 | case UNEQ: | |
1523 | code1 = LT; | |
1524 | code2 = GT; | |
1525 | jump_code = EQ; | |
1526 | break; | |
1527 | ||
1528 | default: | |
1529 | gcc_unreachable (); | |
1530 | } | |
1531 | ||
1532 | cmp = gen_reg_rtx (SImode); | |
d1f9b275 | 1533 | emit_insn (gen_rtx_SET (cmp, gen_rtx_fmt_ee (code1, SImode, op0, op1))); |
5aa04b01 | 1534 | fn = op_mode == DFmode ? gen_cmpdf_ior : gen_cmpsf_ior; |
1535 | emit_insn (fn (cmp, gen_rtx_fmt_ee (code2, SImode, op0, op1), | |
1536 | op0, op1, cmp)); | |
1537 | if (code3 != UNKNOWN) | |
1538 | emit_insn (fn (cmp, gen_rtx_fmt_ee (code3, SImode, op0, op1), | |
1539 | op0, op1, cmp)); | |
1540 | } | |
1541 | else if (op_mode == SImode && (code == NE || code == EQ) && op1 == const0_rtx) | |
1542 | cmp = op0; | |
1543 | else | |
1544 | { | |
1545 | bool is_fp_libfunc; | |
1546 | is_fp_libfunc = !TARGET_FP && (op_mode == DFmode || op_mode == SFmode); | |
1547 | ||
1548 | if ((code == NE || code == GEU || code == LEU || code == GE || code == LE) | |
1549 | && !is_fp_libfunc) | |
1550 | { | |
1551 | code = reverse_condition (code); | |
1552 | jump_code = EQ; | |
1553 | } | |
1554 | else if (code == UNGE) | |
1555 | { | |
1556 | code = LT; | |
1557 | jump_code = EQ; | |
1558 | } | |
1559 | else if (code == UNLE) | |
1560 | { | |
1561 | code = GT; | |
1562 | jump_code = EQ; | |
1563 | } | |
1564 | else | |
1565 | jump_code = NE; | |
1566 | ||
1567 | if (is_fp_libfunc) | |
1568 | { | |
de089fe5 | 1569 | rtx_insn *insns; |
5aa04b01 | 1570 | rtx libfunc; |
1571 | switch (code) | |
1572 | { | |
1573 | case EQ: | |
1574 | libfunc = op_mode == DFmode ? eqdf_libfunc : eqsf_libfunc; | |
1575 | break; | |
1576 | case NE: | |
1577 | libfunc = op_mode == DFmode ? nedf_libfunc : nesf_libfunc; | |
1578 | break; | |
1579 | case GT: | |
1580 | libfunc = op_mode == DFmode ? gtdf_libfunc : gtsf_libfunc; | |
1581 | break; | |
1582 | case GE: | |
1583 | libfunc = op_mode == DFmode ? gedf_libfunc : gesf_libfunc; | |
1584 | break; | |
1585 | case LT: | |
1586 | libfunc = op_mode == DFmode ? ltdf_libfunc : ltsf_libfunc; | |
1587 | break; | |
1588 | case LE: | |
1589 | libfunc = op_mode == DFmode ? ledf_libfunc : lesf_libfunc; | |
1590 | break; | |
1591 | default: | |
1592 | gcc_unreachable (); | |
1593 | } | |
1594 | start_sequence (); | |
1595 | ||
9e9e5c15 | 1596 | cmp = emit_library_call_value (libfunc, 0, LCT_CONST, SImode, |
5aa04b01 | 1597 | op0, op_mode, op1, op_mode); |
1598 | insns = get_insns (); | |
1599 | end_sequence (); | |
1600 | ||
1601 | emit_libcall_block (insns, cmp, cmp, | |
1602 | gen_rtx_fmt_ee (code, SImode, op0, op1)); | |
1603 | } | |
1604 | else | |
1605 | { | |
1606 | cmp = gen_reg_rtx (SImode); | |
1607 | if (c6x_force_op_for_comparison_p (code, op1)) | |
1608 | op1 = force_reg (SImode, op1); | |
d1f9b275 | 1609 | emit_insn (gen_rtx_SET (cmp, gen_rtx_fmt_ee (code, SImode, |
1610 | op0, op1))); | |
5aa04b01 | 1611 | } |
1612 | } | |
1613 | ||
1614 | return gen_rtx_fmt_ee (jump_code, mode, cmp, const0_rtx); | |
1615 | } | |
1616 | ||
1617 | /* Return one word of double-word value OP. HIGH_P is true to select the | |
1618 | high part, false to select the low part. When encountering auto-increment | |
1619 | addressing, we make the assumption that the low part is going to be accessed | |
1620 | first. */ | |
1621 | ||
1622 | rtx | |
1623 | c6x_subword (rtx op, bool high_p) | |
1624 | { | |
1625 | unsigned int byte; | |
3754d046 | 1626 | machine_mode mode; |
5aa04b01 | 1627 | |
1628 | mode = GET_MODE (op); | |
1629 | if (mode == VOIDmode) | |
1630 | mode = DImode; | |
1631 | ||
1632 | if (TARGET_BIG_ENDIAN ? !high_p : high_p) | |
1633 | byte = UNITS_PER_WORD; | |
1634 | else | |
1635 | byte = 0; | |
1636 | ||
1637 | if (MEM_P (op)) | |
1638 | { | |
1639 | rtx addr = XEXP (op, 0); | |
1640 | if (GET_CODE (addr) == PLUS || REG_P (addr)) | |
1641 | return adjust_address (op, word_mode, byte); | |
1642 | /* FIXME: should really support autoincrement addressing for | |
1643 | multi-word modes. */ | |
1644 | gcc_unreachable (); | |
1645 | } | |
1646 | ||
1647 | return simplify_gen_subreg (word_mode, op, mode, byte); | |
1648 | } | |
1649 | ||
1650 | /* Split one or more DImode RTL references into pairs of SImode | |
1651 | references. The RTL can be REG, offsettable MEM, integer constant, or | |
1652 | CONST_DOUBLE. "operands" is a pointer to an array of DImode RTL to | |
1653 | split and "num" is its length. lo_half and hi_half are output arrays | |
1654 | that parallel "operands". */ | |
1655 | ||
1656 | void | |
1657 | split_di (rtx operands[], int num, rtx lo_half[], rtx hi_half[]) | |
1658 | { | |
1659 | while (num--) | |
1660 | { | |
1661 | rtx op = operands[num]; | |
1662 | ||
1663 | lo_half[num] = c6x_subword (op, false); | |
1664 | hi_half[num] = c6x_subword (op, true); | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | /* Return true if VAL is a mask valid for a clr instruction. */ | |
1669 | bool | |
1670 | c6x_valid_mask_p (HOST_WIDE_INT val) | |
1671 | { | |
1672 | int i; | |
1673 | for (i = 0; i < 32; i++) | |
1674 | if (!(val & ((unsigned HOST_WIDE_INT)1 << i))) | |
1675 | break; | |
1676 | for (; i < 32; i++) | |
1677 | if (val & ((unsigned HOST_WIDE_INT)1 << i)) | |
1678 | break; | |
1679 | for (; i < 32; i++) | |
1680 | if (!(val & ((unsigned HOST_WIDE_INT)1 << i))) | |
1681 | return false; | |
1682 | return true; | |
1683 | } | |
1684 | ||
1685 | /* Expand a block move for a movmemM pattern. */ | |
1686 | ||
1687 | bool | |
1688 | c6x_expand_movmem (rtx dst, rtx src, rtx count_exp, rtx align_exp, | |
1689 | rtx expected_align_exp ATTRIBUTE_UNUSED, | |
1690 | rtx expected_size_exp ATTRIBUTE_UNUSED) | |
1691 | { | |
1692 | unsigned HOST_WIDE_INT align = 1; | |
1693 | unsigned HOST_WIDE_INT src_mem_align, dst_mem_align, min_mem_align; | |
1694 | unsigned HOST_WIDE_INT count = 0, offset = 0; | |
1695 | unsigned int biggest_move = TARGET_STDW ? 8 : 4; | |
1696 | ||
1697 | if (CONST_INT_P (align_exp)) | |
1698 | align = INTVAL (align_exp); | |
1699 | ||
1700 | src_mem_align = MEM_ALIGN (src) / BITS_PER_UNIT; | |
1701 | dst_mem_align = MEM_ALIGN (dst) / BITS_PER_UNIT; | |
1702 | min_mem_align = MIN (src_mem_align, dst_mem_align); | |
1703 | ||
1704 | if (min_mem_align > align) | |
1705 | align = min_mem_align / BITS_PER_UNIT; | |
1706 | if (src_mem_align < align) | |
1707 | src_mem_align = align; | |
1708 | if (dst_mem_align < align) | |
1709 | dst_mem_align = align; | |
1710 | ||
1711 | if (CONST_INT_P (count_exp)) | |
1712 | count = INTVAL (count_exp); | |
1713 | else | |
1714 | return false; | |
1715 | ||
1716 | /* Make sure we don't need to care about overflow later on. */ | |
1717 | if (count > ((unsigned HOST_WIDE_INT) 1 << 30)) | |
1718 | return false; | |
1719 | ||
1720 | if (count >= 28 && (count & 3) == 0 && align >= 4) | |
1721 | { | |
1722 | tree dst_expr = MEM_EXPR (dst); | |
1723 | tree src_expr = MEM_EXPR (src); | |
1724 | rtx fn = TARGET_INSNS_64PLUS ? strasgi64p_libfunc : strasgi_libfunc; | |
1725 | rtx srcreg = force_reg (Pmode, XEXP (src, 0)); | |
1726 | rtx dstreg = force_reg (Pmode, XEXP (dst, 0)); | |
1727 | ||
1728 | if (src_expr) | |
1729 | mark_addressable (src_expr); | |
1730 | if (dst_expr) | |
1731 | mark_addressable (dst_expr); | |
9e9e5c15 | 1732 | emit_library_call (fn, LCT_NORMAL, VOIDmode, |
5aa04b01 | 1733 | dstreg, Pmode, srcreg, Pmode, count_exp, SImode); |
1734 | return true; | |
1735 | } | |
1736 | ||
1737 | if (biggest_move > align && !TARGET_INSNS_64) | |
1738 | biggest_move = align; | |
1739 | ||
1740 | if (count / biggest_move > 7) | |
1741 | return false; | |
1742 | ||
1743 | while (count > 0) | |
1744 | { | |
1745 | rtx reg, reg_lowpart; | |
3754d046 | 1746 | machine_mode srcmode, dstmode; |
5aa04b01 | 1747 | unsigned HOST_WIDE_INT src_size, dst_size, src_left; |
1748 | int shift; | |
1749 | rtx srcmem, dstmem; | |
1750 | ||
1751 | while (biggest_move > count) | |
1752 | biggest_move /= 2; | |
1753 | ||
1754 | src_size = dst_size = biggest_move; | |
1755 | if (src_size > src_mem_align && src_size == 2) | |
1756 | src_size = 1; | |
1757 | if (dst_size > dst_mem_align && dst_size == 2) | |
1758 | dst_size = 1; | |
1759 | ||
1760 | if (dst_size > src_size) | |
1761 | dst_size = src_size; | |
1762 | ||
517be012 | 1763 | srcmode = int_mode_for_size (src_size * BITS_PER_UNIT, 0).require (); |
1764 | dstmode = int_mode_for_size (dst_size * BITS_PER_UNIT, 0).require (); | |
5aa04b01 | 1765 | if (src_size >= 4) |
1766 | reg_lowpart = reg = gen_reg_rtx (srcmode); | |
1767 | else | |
1768 | { | |
1769 | reg = gen_reg_rtx (SImode); | |
1770 | reg_lowpart = gen_lowpart (srcmode, reg); | |
1771 | } | |
1772 | ||
1773 | srcmem = adjust_address (copy_rtx (src), srcmode, offset); | |
1774 | ||
1775 | if (src_size > src_mem_align) | |
1776 | { | |
1777 | enum insn_code icode = (srcmode == SImode ? CODE_FOR_movmisalignsi | |
1778 | : CODE_FOR_movmisaligndi); | |
1779 | emit_insn (GEN_FCN (icode) (reg_lowpart, srcmem)); | |
1780 | } | |
1781 | else | |
1782 | emit_move_insn (reg_lowpart, srcmem); | |
1783 | ||
1784 | src_left = src_size; | |
1785 | shift = TARGET_BIG_ENDIAN ? (src_size - dst_size) * BITS_PER_UNIT : 0; | |
1786 | while (src_left > 0) | |
1787 | { | |
1788 | rtx dstreg = reg_lowpart; | |
1789 | ||
1790 | if (src_size > dst_size) | |
1791 | { | |
1792 | rtx srcword = reg; | |
1793 | int shift_amount = shift & (BITS_PER_WORD - 1); | |
1794 | if (src_size > 4) | |
1795 | srcword = operand_subword_force (srcword, src_left >= 4 ? 0 : 4, | |
1796 | SImode); | |
1797 | if (shift_amount > 0) | |
1798 | { | |
1799 | dstreg = gen_reg_rtx (SImode); | |
1800 | emit_insn (gen_lshrsi3 (dstreg, srcword, | |
1801 | GEN_INT (shift_amount))); | |
1802 | } | |
1803 | else | |
1804 | dstreg = srcword; | |
1805 | dstreg = gen_lowpart (dstmode, dstreg); | |
1806 | } | |
1807 | ||
1808 | dstmem = adjust_address (copy_rtx (dst), dstmode, offset); | |
1809 | if (dst_size > dst_mem_align) | |
1810 | { | |
1811 | enum insn_code icode = (dstmode == SImode ? CODE_FOR_movmisalignsi | |
1812 | : CODE_FOR_movmisaligndi); | |
1813 | emit_insn (GEN_FCN (icode) (dstmem, dstreg)); | |
1814 | } | |
1815 | else | |
1816 | emit_move_insn (dstmem, dstreg); | |
1817 | ||
1818 | if (TARGET_BIG_ENDIAN) | |
1819 | shift -= dst_size * BITS_PER_UNIT; | |
1820 | else | |
1821 | shift += dst_size * BITS_PER_UNIT; | |
1822 | offset += dst_size; | |
1823 | src_left -= dst_size; | |
1824 | } | |
1825 | count -= src_size; | |
1826 | } | |
1827 | return true; | |
1828 | } | |
1829 | \f | |
1830 | /* Subroutine of print_address_operand, print a single address offset OFF for | |
1831 | a memory access of mode MEM_MODE, choosing between normal form and scaled | |
1832 | form depending on the type of the insn. Misaligned memory references must | |
1833 | use the scaled form. */ | |
1834 | ||
1835 | static void | |
3754d046 | 1836 | print_address_offset (FILE *file, rtx off, machine_mode mem_mode) |
5aa04b01 | 1837 | { |
1838 | rtx pat; | |
1839 | ||
1840 | if (c6x_current_insn != NULL_RTX) | |
1841 | { | |
1842 | pat = PATTERN (c6x_current_insn); | |
1843 | if (GET_CODE (pat) == COND_EXEC) | |
1844 | pat = COND_EXEC_CODE (pat); | |
1845 | if (GET_CODE (pat) == PARALLEL) | |
1846 | pat = XVECEXP (pat, 0, 0); | |
1847 | ||
1848 | if (GET_CODE (pat) == SET | |
1849 | && GET_CODE (SET_SRC (pat)) == UNSPEC | |
1850 | && XINT (SET_SRC (pat), 1) == UNSPEC_MISALIGNED_ACCESS) | |
1851 | { | |
1852 | gcc_assert (CONST_INT_P (off) | |
1853 | && (INTVAL (off) & (GET_MODE_SIZE (mem_mode) - 1)) == 0); | |
1854 | fprintf (file, "[" HOST_WIDE_INT_PRINT_DEC "]", | |
1855 | INTVAL (off) / GET_MODE_SIZE (mem_mode)); | |
1856 | return; | |
1857 | } | |
1858 | } | |
1859 | fputs ("(", file); | |
3c047fe9 | 1860 | output_address (mem_mode, off); |
5aa04b01 | 1861 | fputs (")", file); |
1862 | } | |
1863 | ||
1864 | static bool | |
1865 | c6x_print_operand_punct_valid_p (unsigned char c) | |
1866 | { | |
1867 | return c == '$' || c == '.' || c == '|'; | |
1868 | } | |
1869 | ||
1870 | static void c6x_print_operand (FILE *, rtx, int); | |
1871 | ||
1872 | /* Subroutine of c6x_print_operand; used to print a memory reference X to FILE. */ | |
1873 | ||
1874 | static void | |
3754d046 | 1875 | c6x_print_address_operand (FILE *file, rtx x, machine_mode mem_mode) |
5aa04b01 | 1876 | { |
1877 | rtx off; | |
1878 | switch (GET_CODE (x)) | |
1879 | { | |
1880 | case PRE_MODIFY: | |
1881 | case POST_MODIFY: | |
1882 | if (GET_CODE (x) == POST_MODIFY) | |
3c047fe9 | 1883 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1884 | off = XEXP (XEXP (x, 1), 1); |
1885 | if (XEXP (x, 0) == stack_pointer_rtx) | |
1886 | { | |
1887 | if (GET_CODE (x) == PRE_MODIFY) | |
1888 | gcc_assert (INTVAL (off) > 0); | |
1889 | else | |
1890 | gcc_assert (INTVAL (off) < 0); | |
1891 | } | |
1892 | if (CONST_INT_P (off) && INTVAL (off) < 0) | |
1893 | { | |
1894 | fprintf (file, "--"); | |
1895 | off = GEN_INT (-INTVAL (off)); | |
1896 | } | |
1897 | else | |
1898 | fprintf (file, "++"); | |
1899 | if (GET_CODE (x) == PRE_MODIFY) | |
3c047fe9 | 1900 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1901 | print_address_offset (file, off, mem_mode); |
1902 | break; | |
1903 | ||
1904 | case PLUS: | |
1905 | off = XEXP (x, 1); | |
1906 | if (CONST_INT_P (off) && INTVAL (off) < 0) | |
1907 | { | |
1908 | fprintf (file, "-"); | |
1909 | off = GEN_INT (-INTVAL (off)); | |
1910 | } | |
1911 | else | |
1912 | fprintf (file, "+"); | |
3c047fe9 | 1913 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1914 | print_address_offset (file, off, mem_mode); |
1915 | break; | |
1916 | ||
1917 | case PRE_DEC: | |
1918 | gcc_assert (XEXP (x, 0) != stack_pointer_rtx); | |
1919 | fprintf (file, "--"); | |
3c047fe9 | 1920 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1921 | fprintf (file, "[1]"); |
1922 | break; | |
1923 | case PRE_INC: | |
1924 | fprintf (file, "++"); | |
3c047fe9 | 1925 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1926 | fprintf (file, "[1]"); |
1927 | break; | |
1928 | case POST_INC: | |
1929 | gcc_assert (XEXP (x, 0) != stack_pointer_rtx); | |
3c047fe9 | 1930 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1931 | fprintf (file, "++[1]"); |
1932 | break; | |
1933 | case POST_DEC: | |
3c047fe9 | 1934 | output_address (mem_mode, XEXP (x, 0)); |
5aa04b01 | 1935 | fprintf (file, "--[1]"); |
1936 | break; | |
1937 | ||
1938 | case SYMBOL_REF: | |
1939 | case CONST: | |
1940 | case LABEL_REF: | |
1941 | gcc_assert (sdata_symbolic_operand (x, Pmode)); | |
1942 | fprintf (file, "+B14("); | |
1943 | output_addr_const (file, x); | |
1944 | fprintf (file, ")"); | |
1945 | break; | |
1946 | ||
1947 | case UNSPEC: | |
1948 | switch (XINT (x, 1)) | |
1949 | { | |
1950 | case UNSPEC_LOAD_GOT: | |
1951 | fputs ("$GOT(", file); | |
1952 | output_addr_const (file, XVECEXP (x, 0, 0)); | |
1953 | fputs (")", file); | |
1954 | break; | |
1955 | case UNSPEC_LOAD_SDATA: | |
1956 | output_addr_const (file, XVECEXP (x, 0, 0)); | |
1957 | break; | |
1958 | default: | |
1959 | gcc_unreachable (); | |
1960 | } | |
1961 | break; | |
1962 | ||
1963 | default: | |
1964 | gcc_assert (GET_CODE (x) != MEM); | |
1965 | c6x_print_operand (file, x, 0); | |
1966 | break; | |
1967 | } | |
1968 | } | |
1969 | ||
1970 | /* Return a single character, which is either 'l', 's', 'd' or 'm', which | |
1971 | specifies the functional unit used by INSN. */ | |
1972 | ||
1973 | char | |
de089fe5 | 1974 | c6x_get_unit_specifier (rtx_insn *insn) |
5aa04b01 | 1975 | { |
1976 | enum attr_units units; | |
1977 | ||
f1f41a6c | 1978 | if (insn_info.exists ()) |
5aa04b01 | 1979 | { |
1980 | int unit = INSN_INFO_ENTRY (INSN_UID (insn)).reservation; | |
1981 | return c6x_unit_names[unit][0]; | |
1982 | } | |
1983 | ||
1984 | units = get_attr_units (insn); | |
1985 | switch (units) | |
1986 | { | |
1987 | case UNITS_D: | |
1988 | case UNITS_DL: | |
1989 | case UNITS_DS: | |
1990 | case UNITS_DLS: | |
1991 | case UNITS_D_ADDR: | |
1992 | return 'd'; | |
5aa04b01 | 1993 | case UNITS_L: |
1994 | case UNITS_LS: | |
1995 | return 'l'; | |
5aa04b01 | 1996 | case UNITS_S: |
1997 | return 's'; | |
5aa04b01 | 1998 | case UNITS_M: |
1999 | return 'm'; | |
5aa04b01 | 2000 | default: |
2001 | gcc_unreachable (); | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | /* Prints the unit specifier field. */ | |
2006 | static void | |
de089fe5 | 2007 | c6x_print_unit_specifier_field (FILE *file, rtx_insn *insn) |
5aa04b01 | 2008 | { |
2009 | enum attr_units units = get_attr_units (insn); | |
2010 | enum attr_cross cross = get_attr_cross (insn); | |
2011 | enum attr_dest_regfile rf = get_attr_dest_regfile (insn); | |
2012 | int half; | |
2013 | char unitspec; | |
2014 | ||
2015 | if (units == UNITS_D_ADDR) | |
2016 | { | |
2017 | enum attr_addr_regfile arf = get_attr_addr_regfile (insn); | |
2018 | int t_half; | |
2019 | gcc_assert (arf != ADDR_REGFILE_UNKNOWN); | |
2020 | half = arf == ADDR_REGFILE_A ? 1 : 2; | |
2021 | t_half = rf == DEST_REGFILE_A ? 1 : 2; | |
2022 | fprintf (file, ".d%dt%d", half, t_half); | |
2023 | return; | |
2024 | } | |
2025 | ||
f1f41a6c | 2026 | if (insn_info.exists ()) |
5aa04b01 | 2027 | { |
2028 | int unit = INSN_INFO_ENTRY (INSN_UID (insn)).reservation; | |
2029 | fputs (".", file); | |
2030 | fputs (c6x_unit_names[unit], file); | |
2031 | if (cross == CROSS_Y) | |
2032 | fputs ("x", file); | |
2033 | return; | |
2034 | } | |
2035 | ||
2036 | gcc_assert (rf != DEST_REGFILE_UNKNOWN); | |
2037 | unitspec = c6x_get_unit_specifier (insn); | |
2038 | half = rf == DEST_REGFILE_A ? 1 : 2; | |
2039 | fprintf (file, ".%c%d%s", unitspec, half, cross == CROSS_Y ? "x" : ""); | |
2040 | } | |
2041 | ||
2042 | /* Output assembly language output for the address ADDR to FILE. */ | |
2043 | static void | |
3c047fe9 | 2044 | c6x_print_operand_address (FILE *file, machine_mode mode, rtx addr) |
5aa04b01 | 2045 | { |
3c047fe9 | 2046 | c6x_print_address_operand (file, addr, mode); |
5aa04b01 | 2047 | } |
2048 | ||
2049 | /* Print an operand, X, to FILE, with an optional modifier in CODE. | |
2050 | ||
2051 | Meaning of CODE: | |
2052 | $ -- print the unit specifier field for the instruction. | |
2053 | . -- print the predicate for the instruction or an emptry string for an | |
2054 | unconditional one. | |
2055 | | -- print "||" if the insn should be issued in parallel with the previous | |
2056 | one. | |
2057 | ||
2058 | C -- print an opcode suffix for a reversed condition | |
2059 | d -- H, W or D as a suffix for ADDA, based on the factor given by the | |
2060 | operand | |
2061 | D -- print either B, H, W or D as a suffix for ADDA, based on the size of | |
2062 | the operand | |
2063 | J -- print a predicate | |
2064 | j -- like J, but use reverse predicate | |
2065 | k -- treat a CONST_INT as a register number and print it as a register | |
2066 | k -- like k, but print out a doubleword register | |
2067 | n -- print an integer operand, negated | |
2068 | p -- print the low part of a DImode register | |
2069 | P -- print the high part of a DImode register | |
2070 | r -- print the absolute value of an integer operand, shifted right by 1 | |
2071 | R -- print the absolute value of an integer operand, shifted right by 2 | |
2072 | f -- the first clear bit in an integer operand assumed to be a mask for | |
2073 | a clr instruction | |
2074 | F -- the last clear bit in such a mask | |
2075 | s -- the first set bit in an integer operand assumed to be a mask for | |
2076 | a set instruction | |
2077 | S -- the last set bit in such a mask | |
2078 | U -- print either 1 or 2, depending on the side of the machine used by | |
2079 | the operand */ | |
2080 | ||
2081 | static void | |
2082 | c6x_print_operand (FILE *file, rtx x, int code) | |
2083 | { | |
2084 | int i; | |
2085 | HOST_WIDE_INT v; | |
2086 | tree t; | |
3754d046 | 2087 | machine_mode mode; |
5aa04b01 | 2088 | |
2089 | if (code == '|') | |
2090 | { | |
2091 | if (GET_MODE (c6x_current_insn) != TImode) | |
2092 | fputs ("||", file); | |
2093 | return; | |
2094 | } | |
2095 | if (code == '$') | |
2096 | { | |
2097 | c6x_print_unit_specifier_field (file, c6x_current_insn); | |
2098 | return; | |
2099 | } | |
2100 | ||
2101 | if (code == '.') | |
2102 | { | |
2103 | x = current_insn_predicate; | |
2104 | if (x) | |
2105 | { | |
2106 | unsigned int regno = REGNO (XEXP (x, 0)); | |
2107 | fputs ("[", file); | |
2108 | if (GET_CODE (x) == EQ) | |
2109 | fputs ("!", file); | |
2110 | fputs (reg_names [regno], file); | |
2111 | fputs ("]", file); | |
2112 | } | |
2113 | return; | |
2114 | } | |
2115 | ||
2116 | mode = GET_MODE (x); | |
2117 | ||
2118 | switch (code) | |
2119 | { | |
2120 | case 'C': | |
2121 | case 'c': | |
2122 | { | |
2123 | enum rtx_code c = GET_CODE (x); | |
2124 | if (code == 'C') | |
2125 | c = swap_condition (c); | |
2126 | fputs (GET_RTX_NAME (c), file); | |
2127 | } | |
2128 | return; | |
2129 | ||
2130 | case 'J': | |
2131 | case 'j': | |
2132 | { | |
2133 | unsigned int regno = REGNO (XEXP (x, 0)); | |
2134 | if ((GET_CODE (x) == EQ) == (code == 'J')) | |
2135 | fputs ("!", file); | |
2136 | fputs (reg_names [regno], file); | |
2137 | } | |
2138 | return; | |
2139 | ||
2140 | case 'k': | |
2141 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2142 | v = INTVAL (x); | |
2143 | fprintf (file, "%s", reg_names[v]); | |
2144 | return; | |
2145 | case 'K': | |
2146 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2147 | v = INTVAL (x); | |
2148 | gcc_assert ((v & 1) == 0); | |
2149 | fprintf (file, "%s:%s", reg_names[v + 1], reg_names[v]); | |
2150 | return; | |
2151 | ||
2152 | case 's': | |
2153 | case 'S': | |
2154 | case 'f': | |
2155 | case 'F': | |
2156 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2157 | v = INTVAL (x); | |
2158 | for (i = 0; i < 32; i++) | |
2159 | { | |
2160 | HOST_WIDE_INT tst = v & 1; | |
2161 | if (((code == 'f' || code == 'F') && !tst) | |
2162 | || ((code == 's' || code == 'S') && tst)) | |
2163 | break; | |
2164 | v >>= 1; | |
2165 | } | |
2166 | if (code == 'f' || code == 's') | |
2167 | { | |
2168 | fprintf (file, "%d", i); | |
2169 | return; | |
2170 | } | |
2171 | for (;i < 32; i++) | |
2172 | { | |
2173 | HOST_WIDE_INT tst = v & 1; | |
2174 | if ((code == 'F' && tst) || (code == 'S' && !tst)) | |
2175 | break; | |
2176 | v >>= 1; | |
2177 | } | |
2178 | fprintf (file, "%d", i - 1); | |
2179 | return; | |
2180 | ||
2181 | case 'n': | |
2182 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2183 | output_addr_const (file, GEN_INT (-INTVAL (x))); | |
2184 | return; | |
2185 | ||
2186 | case 'r': | |
2187 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2188 | v = INTVAL (x); | |
2189 | if (v < 0) | |
2190 | v = -v; | |
2191 | output_addr_const (file, GEN_INT (v >> 1)); | |
2192 | return; | |
2193 | ||
2194 | case 'R': | |
2195 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2196 | v = INTVAL (x); | |
2197 | if (v < 0) | |
2198 | v = -v; | |
2199 | output_addr_const (file, GEN_INT (v >> 2)); | |
2200 | return; | |
2201 | ||
2202 | case 'd': | |
2203 | gcc_assert (GET_CODE (x) == CONST_INT); | |
2204 | v = INTVAL (x); | |
2205 | fputs (v == 2 ? "h" : v == 4 ? "w" : "d", file); | |
2206 | return; | |
2207 | ||
2208 | case 'p': | |
2209 | case 'P': | |
2210 | gcc_assert (GET_CODE (x) == REG); | |
2211 | v = REGNO (x); | |
2212 | if (code == 'P') | |
2213 | v++; | |
2214 | fputs (reg_names[v], file); | |
2215 | return; | |
2216 | ||
2217 | case 'D': | |
2218 | v = 0; | |
2219 | if (GET_CODE (x) == CONST) | |
2220 | { | |
2221 | x = XEXP (x, 0); | |
2222 | gcc_assert (GET_CODE (x) == PLUS); | |
2223 | gcc_assert (GET_CODE (XEXP (x, 1)) == CONST_INT); | |
2224 | v = INTVAL (XEXP (x, 1)); | |
2225 | x = XEXP (x, 0); | |
2226 | ||
2227 | } | |
2228 | gcc_assert (GET_CODE (x) == SYMBOL_REF); | |
2229 | ||
2230 | t = SYMBOL_REF_DECL (x); | |
2231 | if (DECL_P (t)) | |
2232 | v |= DECL_ALIGN_UNIT (t); | |
2233 | else | |
2234 | v |= TYPE_ALIGN_UNIT (TREE_TYPE (t)); | |
2235 | if (v & 1) | |
2236 | fputs ("b", file); | |
2237 | else if (v & 2) | |
2238 | fputs ("h", file); | |
2239 | else | |
2240 | fputs ("w", file); | |
2241 | return; | |
2242 | ||
2243 | case 'U': | |
2244 | if (MEM_P (x)) | |
2245 | { | |
2246 | x = XEXP (x, 0); | |
2247 | if (GET_CODE (x) == PLUS | |
2248 | || GET_RTX_CLASS (GET_CODE (x)) == RTX_AUTOINC) | |
2249 | x = XEXP (x, 0); | |
2250 | if (GET_CODE (x) == CONST || GET_CODE (x) == SYMBOL_REF) | |
2251 | { | |
2252 | gcc_assert (sdata_symbolic_operand (x, Pmode)); | |
2253 | fputs ("2", file); | |
2254 | return; | |
2255 | } | |
2256 | } | |
2257 | gcc_assert (REG_P (x)); | |
2258 | if (A_REGNO_P (REGNO (x))) | |
2259 | fputs ("1", file); | |
2260 | if (B_REGNO_P (REGNO (x))) | |
2261 | fputs ("2", file); | |
2262 | return; | |
2263 | ||
2264 | default: | |
2265 | switch (GET_CODE (x)) | |
2266 | { | |
2267 | case REG: | |
2268 | if (GET_MODE_SIZE (mode) == 8) | |
2269 | fprintf (file, "%s:%s", reg_names[REGNO (x) + 1], | |
2270 | reg_names[REGNO (x)]); | |
2271 | else | |
2272 | fprintf (file, "%s", reg_names[REGNO (x)]); | |
2273 | break; | |
2274 | ||
2275 | case MEM: | |
2276 | fputc ('*', file); | |
2277 | gcc_assert (XEXP (x, 0) != stack_pointer_rtx); | |
2278 | c6x_print_address_operand (file, XEXP (x, 0), GET_MODE (x)); | |
2279 | break; | |
2280 | ||
2281 | case SYMBOL_REF: | |
2282 | fputc ('(', file); | |
2283 | output_addr_const (file, x); | |
2284 | fputc (')', file); | |
2285 | break; | |
2286 | ||
2287 | case CONST_INT: | |
2288 | output_addr_const (file, x); | |
2289 | break; | |
2290 | ||
2291 | case CONST_DOUBLE: | |
2292 | output_operand_lossage ("invalid const_double operand"); | |
2293 | break; | |
2294 | ||
2295 | default: | |
2296 | output_addr_const (file, x); | |
2297 | } | |
2298 | } | |
2299 | } | |
2300 | \f | |
2301 | /* Return TRUE if OP is a valid memory address with a base register of | |
2302 | class C. If SMALL_OFFSET is true, we disallow memory references which would | |
2303 | require a long offset with B14/B15. */ | |
2304 | ||
2305 | bool | |
2306 | c6x_mem_operand (rtx op, enum reg_class c, bool small_offset) | |
2307 | { | |
3754d046 | 2308 | machine_mode mode = GET_MODE (op); |
5aa04b01 | 2309 | rtx base = XEXP (op, 0); |
2310 | switch (GET_CODE (base)) | |
2311 | { | |
2312 | case REG: | |
2313 | break; | |
2314 | case PLUS: | |
2315 | if (small_offset | |
2316 | && (XEXP (base, 0) == stack_pointer_rtx | |
2317 | || XEXP (base, 0) == pic_offset_table_rtx)) | |
2318 | { | |
2319 | if (!c6x_legitimate_address_p_1 (mode, base, true, true)) | |
2320 | return false; | |
2321 | } | |
2322 | ||
2323 | /* fall through */ | |
2324 | case PRE_INC: | |
2325 | case PRE_DEC: | |
2326 | case PRE_MODIFY: | |
2327 | case POST_INC: | |
2328 | case POST_DEC: | |
2329 | case POST_MODIFY: | |
2330 | base = XEXP (base, 0); | |
2331 | break; | |
2332 | ||
2333 | case CONST: | |
2334 | case LABEL_REF: | |
2335 | case SYMBOL_REF: | |
2336 | gcc_assert (sdata_symbolic_operand (base, Pmode)); | |
2337 | return !small_offset && c == B_REGS; | |
2338 | ||
2339 | default: | |
2340 | return false; | |
2341 | } | |
2342 | return TEST_HARD_REG_BIT (reg_class_contents[ (int) (c)], REGNO (base)); | |
2343 | } | |
2344 | ||
2345 | /* Returns true if X is a valid address for use in a memory reference | |
2346 | of mode MODE. If STRICT is true, we do not allow pseudo registers | |
2347 | in the address. NO_LARGE_OFFSET is true if we are examining an | |
2348 | address for use in a load or store misaligned instruction, or | |
2349 | recursively examining an operand inside a PRE/POST_MODIFY. */ | |
2350 | ||
2351 | bool | |
3754d046 | 2352 | c6x_legitimate_address_p_1 (machine_mode mode, rtx x, bool strict, |
5aa04b01 | 2353 | bool no_large_offset) |
2354 | { | |
2355 | int size, size1; | |
2356 | HOST_WIDE_INT off; | |
2357 | enum rtx_code code = GET_CODE (x); | |
2358 | ||
2359 | switch (code) | |
2360 | { | |
2361 | case PRE_MODIFY: | |
2362 | case POST_MODIFY: | |
2363 | /* We can't split these into word-sized pieces yet. */ | |
2364 | if (!TARGET_STDW && GET_MODE_SIZE (mode) > UNITS_PER_WORD) | |
2365 | return false; | |
2366 | if (GET_CODE (XEXP (x, 1)) != PLUS) | |
2367 | return false; | |
2368 | if (!c6x_legitimate_address_p_1 (mode, XEXP (x, 1), strict, true)) | |
2369 | return false; | |
2370 | if (!rtx_equal_p (XEXP (x, 0), XEXP (XEXP (x, 1), 0))) | |
2371 | return false; | |
2372 | ||
2373 | /* fall through */ | |
2374 | case PRE_INC: | |
2375 | case PRE_DEC: | |
2376 | case POST_INC: | |
2377 | case POST_DEC: | |
2378 | /* We can't split these into word-sized pieces yet. */ | |
2379 | if (!TARGET_STDW && GET_MODE_SIZE (mode) > UNITS_PER_WORD) | |
2380 | return false; | |
2381 | x = XEXP (x, 0); | |
2382 | if (!REG_P (x)) | |
2383 | return false; | |
2384 | ||
2385 | /* fall through */ | |
2386 | case REG: | |
2387 | if (strict) | |
2388 | return REGNO_OK_FOR_BASE_STRICT_P (REGNO (x)); | |
2389 | else | |
2390 | return REGNO_OK_FOR_BASE_NONSTRICT_P (REGNO (x)); | |
2391 | ||
2392 | case PLUS: | |
2393 | if (!REG_P (XEXP (x, 0)) | |
2394 | || !c6x_legitimate_address_p_1 (mode, XEXP (x, 0), strict, false)) | |
2395 | return false; | |
2396 | /* We cannot ensure currently that both registers end up in the | |
2397 | same register file. */ | |
2398 | if (REG_P (XEXP (x, 1))) | |
2399 | return false; | |
2400 | ||
2401 | if (mode == BLKmode) | |
2402 | size = 4; | |
2403 | else if (mode == VOIDmode) | |
2404 | /* ??? This can happen during ivopts. */ | |
2405 | size = 1; | |
2406 | else | |
2407 | size = GET_MODE_SIZE (mode); | |
2408 | ||
2409 | if (flag_pic | |
2410 | && GET_CODE (XEXP (x, 1)) == UNSPEC | |
2411 | && XINT (XEXP (x, 1), 1) == UNSPEC_LOAD_SDATA | |
2412 | && XEXP (x, 0) == pic_offset_table_rtx | |
2413 | && sdata_symbolic_operand (XVECEXP (XEXP (x, 1), 0, 0), SImode)) | |
2414 | return !no_large_offset && size <= 4; | |
2415 | if (flag_pic == 1 | |
2416 | && mode == Pmode | |
2417 | && GET_CODE (XEXP (x, 1)) == UNSPEC | |
2418 | && XINT (XEXP (x, 1), 1) == UNSPEC_LOAD_GOT | |
2419 | && XEXP (x, 0) == pic_offset_table_rtx | |
2420 | && (GET_CODE (XVECEXP (XEXP (x, 1), 0, 0)) == SYMBOL_REF | |
2421 | || GET_CODE (XVECEXP (XEXP (x, 1), 0, 0)) == LABEL_REF)) | |
2422 | return !no_large_offset; | |
2423 | if (GET_CODE (XEXP (x, 1)) != CONST_INT) | |
2424 | return false; | |
2425 | ||
2426 | off = INTVAL (XEXP (x, 1)); | |
2427 | ||
2428 | /* If the machine does not have doubleword load/stores, we'll use | |
2429 | word size accesses. */ | |
2430 | size1 = size; | |
2431 | if (size == 2 * UNITS_PER_WORD && !TARGET_STDW) | |
2432 | size = UNITS_PER_WORD; | |
2433 | ||
2434 | if (((HOST_WIDE_INT)size1 - 1) & off) | |
2435 | return false; | |
2436 | off /= size; | |
2437 | if (off > -32 && off < (size1 == size ? 32 : 28)) | |
2438 | return true; | |
2439 | if (no_large_offset || code != PLUS || XEXP (x, 0) != stack_pointer_rtx | |
2440 | || size1 > UNITS_PER_WORD) | |
2441 | return false; | |
2442 | return off >= 0 && off < 32768; | |
2443 | ||
2444 | case CONST: | |
2445 | case SYMBOL_REF: | |
2446 | case LABEL_REF: | |
2447 | return (!no_large_offset | |
2448 | /* With -fpic, we must wrap it in an unspec to show the B14 | |
2449 | dependency. */ | |
2450 | && !flag_pic | |
2451 | && GET_MODE_SIZE (mode) <= UNITS_PER_WORD | |
2452 | && sdata_symbolic_operand (x, Pmode)); | |
2453 | ||
2454 | default: | |
2455 | return false; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | static bool | |
3754d046 | 2460 | c6x_legitimate_address_p (machine_mode mode, rtx x, bool strict) |
5aa04b01 | 2461 | { |
2462 | return c6x_legitimate_address_p_1 (mode, x, strict, false); | |
2463 | } | |
2464 | ||
2465 | static bool | |
3754d046 | 2466 | c6x_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, |
5aa04b01 | 2467 | rtx x ATTRIBUTE_UNUSED) |
2468 | { | |
2469 | return true; | |
2470 | } | |
2471 | \f | |
2472 | /* Implements TARGET_PREFERRED_RENAME_CLASS. */ | |
2473 | static reg_class_t | |
2474 | c6x_preferred_rename_class (reg_class_t cl) | |
2475 | { | |
2476 | if (cl == A_REGS) | |
2477 | return NONPREDICATE_A_REGS; | |
2478 | if (cl == B_REGS) | |
2479 | return NONPREDICATE_B_REGS; | |
2480 | if (cl == ALL_REGS || cl == GENERAL_REGS) | |
2481 | return NONPREDICATE_REGS; | |
2482 | return NO_REGS; | |
2483 | } | |
2484 | \f | |
2485 | /* Implements FINAL_PRESCAN_INSN. */ | |
2486 | void | |
de089fe5 | 2487 | c6x_final_prescan_insn (rtx_insn *insn, rtx *opvec ATTRIBUTE_UNUSED, |
5aa04b01 | 2488 | int noperands ATTRIBUTE_UNUSED) |
2489 | { | |
2490 | c6x_current_insn = insn; | |
2491 | } | |
2492 | \f | |
2493 | /* A structure to describe the stack layout of a function. The layout is | |
2494 | as follows: | |
2495 | ||
2496 | [saved frame pointer (or possibly padding0)] | |
2497 | --> incoming stack pointer, new hard frame pointer | |
2498 | [saved call-used regs] | |
2499 | [optional padding1] | |
2500 | --> soft frame pointer | |
2501 | [frame] | |
2502 | [outgoing arguments] | |
2503 | [optional padding2] | |
2504 | ||
2505 | The structure members are laid out in this order. */ | |
2506 | ||
2507 | struct c6x_frame | |
2508 | { | |
2509 | int padding0; | |
2510 | /* Number of registers to save. */ | |
2511 | int nregs; | |
2512 | int padding1; | |
2513 | HOST_WIDE_INT frame; | |
2514 | int outgoing_arguments_size; | |
2515 | int padding2; | |
2516 | ||
2517 | HOST_WIDE_INT to_allocate; | |
2518 | /* The offsets relative to the incoming stack pointer (which | |
2519 | becomes HARD_FRAME_POINTER). */ | |
2520 | HOST_WIDE_INT frame_pointer_offset; | |
2521 | HOST_WIDE_INT b3_offset; | |
2522 | ||
2523 | /* True if we should call push_rts/pop_rts to save and restore | |
2524 | registers. */ | |
2525 | bool push_rts; | |
2526 | }; | |
2527 | ||
2528 | /* Return true if we need to save and modify the PIC register in the | |
2529 | prologue. */ | |
2530 | ||
2531 | static bool | |
2532 | must_reload_pic_reg_p (void) | |
2533 | { | |
2534 | struct cgraph_local_info *i = NULL; | |
2535 | ||
2536 | if (!TARGET_DSBT) | |
2537 | return false; | |
2538 | ||
35ee1c66 | 2539 | i = cgraph_node::local_info (current_function_decl); |
5aa04b01 | 2540 | |
d5bf7b64 | 2541 | if ((crtl->uses_pic_offset_table || !crtl->is_leaf) && !i->local) |
5aa04b01 | 2542 | return true; |
2543 | return false; | |
2544 | } | |
2545 | ||
2546 | /* Return 1 if we need to save REGNO. */ | |
2547 | static int | |
2548 | c6x_save_reg (unsigned int regno) | |
2549 | { | |
2550 | return ((df_regs_ever_live_p (regno) | |
2551 | && !call_used_regs[regno] | |
2552 | && !fixed_regs[regno]) | |
2553 | || (regno == RETURN_ADDR_REGNO | |
2554 | && (df_regs_ever_live_p (regno) | |
d5bf7b64 | 2555 | || !crtl->is_leaf)) |
5aa04b01 | 2556 | || (regno == PIC_OFFSET_TABLE_REGNUM && must_reload_pic_reg_p ())); |
2557 | } | |
2558 | ||
2559 | /* Examine the number of regs NREGS we've determined we must save. | |
2560 | Return true if we should use __c6xabi_push_rts/__c6xabi_pop_rts for | |
2561 | prologue and epilogue. */ | |
2562 | ||
2563 | static bool | |
2564 | use_push_rts_p (int nregs) | |
2565 | { | |
2566 | if (TARGET_INSNS_64PLUS && optimize_function_for_size_p (cfun) | |
2567 | && !cfun->machine->contains_sibcall | |
2568 | && !cfun->returns_struct | |
2569 | && !TARGET_LONG_CALLS | |
2570 | && nregs >= 6 && !frame_pointer_needed) | |
2571 | return true; | |
2572 | return false; | |
2573 | } | |
2574 | ||
2575 | /* Return number of saved general prupose registers. */ | |
2576 | ||
2577 | int | |
2578 | c6x_nsaved_regs (void) | |
2579 | { | |
2580 | int nregs = 0; | |
2581 | int regno; | |
2582 | ||
2583 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2584 | if (c6x_save_reg (regno)) | |
2585 | nregs++; | |
2586 | return nregs; | |
2587 | } | |
2588 | ||
2589 | /* The safe debug order mandated by the ABI. */ | |
2590 | static unsigned reg_save_order[] = | |
2591 | { | |
2592 | REG_A10, REG_A11, REG_A12, REG_A13, | |
2593 | REG_A14, REG_B3, | |
2594 | REG_B10, REG_B11, REG_B12, REG_B13, | |
2595 | REG_B14, REG_A15 | |
2596 | }; | |
2597 | ||
2598 | #define N_SAVE_ORDER (sizeof reg_save_order / sizeof *reg_save_order) | |
2599 | ||
2600 | /* Compute the layout of the stack frame and store it in FRAME. */ | |
2601 | ||
2602 | static void | |
2603 | c6x_compute_frame_layout (struct c6x_frame *frame) | |
2604 | { | |
2605 | HOST_WIDE_INT size = get_frame_size (); | |
2606 | HOST_WIDE_INT offset; | |
2607 | int nregs; | |
2608 | ||
2609 | /* We use the four bytes which are technically inside the caller's frame, | |
2610 | usually to save the frame pointer. */ | |
2611 | offset = -4; | |
2612 | frame->padding0 = 0; | |
2613 | nregs = c6x_nsaved_regs (); | |
2614 | frame->push_rts = false; | |
2615 | frame->b3_offset = 0; | |
2616 | if (use_push_rts_p (nregs)) | |
2617 | { | |
2618 | frame->push_rts = true; | |
2619 | frame->b3_offset = (TARGET_BIG_ENDIAN ? -12 : -13) * 4; | |
2620 | nregs = 14; | |
2621 | } | |
2622 | else if (c6x_save_reg (REG_B3)) | |
2623 | { | |
2624 | int idx; | |
2625 | for (idx = N_SAVE_ORDER - 1; reg_save_order[idx] != REG_B3; idx--) | |
2626 | { | |
2627 | if (c6x_save_reg (reg_save_order[idx])) | |
2628 | frame->b3_offset -= 4; | |
2629 | } | |
2630 | } | |
2631 | frame->nregs = nregs; | |
2632 | ||
2633 | if (size == 0 && nregs == 0) | |
2634 | { | |
2635 | frame->padding0 = 4; | |
2636 | frame->padding1 = frame->padding2 = 0; | |
2637 | frame->frame_pointer_offset = frame->to_allocate = 0; | |
2638 | frame->outgoing_arguments_size = 0; | |
2639 | return; | |
2640 | } | |
2641 | ||
2642 | if (!frame->push_rts) | |
2643 | offset += frame->nregs * 4; | |
2644 | ||
2645 | if (offset == 0 && size == 0 && crtl->outgoing_args_size == 0 | |
d5bf7b64 | 2646 | && !crtl->is_leaf) |
5aa04b01 | 2647 | /* Don't use the bottom of the caller's frame if we have no |
2648 | allocation of our own and call other functions. */ | |
2649 | frame->padding0 = frame->padding1 = 4; | |
2650 | else if (offset & 4) | |
2651 | frame->padding1 = 4; | |
2652 | else | |
2653 | frame->padding1 = 0; | |
2654 | ||
2655 | offset += frame->padding0 + frame->padding1; | |
2656 | frame->frame_pointer_offset = offset; | |
2657 | offset += size; | |
2658 | ||
2659 | frame->outgoing_arguments_size = crtl->outgoing_args_size; | |
2660 | offset += frame->outgoing_arguments_size; | |
2661 | ||
2662 | if ((offset & 4) == 0) | |
2663 | frame->padding2 = 8; | |
2664 | else | |
2665 | frame->padding2 = 4; | |
2666 | frame->to_allocate = offset + frame->padding2; | |
2667 | } | |
2668 | ||
2669 | /* Return the offset between two registers, one to be eliminated, and the other | |
2670 | its replacement, at the start of a routine. */ | |
2671 | ||
2672 | HOST_WIDE_INT | |
2673 | c6x_initial_elimination_offset (int from, int to) | |
2674 | { | |
2675 | struct c6x_frame frame; | |
2676 | c6x_compute_frame_layout (&frame); | |
2677 | ||
2678 | if (from == ARG_POINTER_REGNUM && to == HARD_FRAME_POINTER_REGNUM) | |
2679 | return 0; | |
2680 | else if (from == FRAME_POINTER_REGNUM | |
2681 | && to == HARD_FRAME_POINTER_REGNUM) | |
2682 | return -frame.frame_pointer_offset; | |
2683 | else | |
2684 | { | |
2685 | gcc_assert (to == STACK_POINTER_REGNUM); | |
2686 | ||
2687 | if (from == ARG_POINTER_REGNUM) | |
2688 | return frame.to_allocate + (frame.push_rts ? 56 : 0); | |
2689 | ||
2690 | gcc_assert (from == FRAME_POINTER_REGNUM); | |
2691 | return frame.to_allocate - frame.frame_pointer_offset; | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | /* Given FROM and TO register numbers, say whether this elimination is | |
2696 | allowed. Frame pointer elimination is automatically handled. */ | |
2697 | ||
2698 | static bool | |
2699 | c6x_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to) | |
2700 | { | |
2701 | if (to == STACK_POINTER_REGNUM) | |
2702 | return !frame_pointer_needed; | |
2703 | return true; | |
2704 | } | |
2705 | ||
2706 | /* Emit insns to increment the stack pointer by OFFSET. If | |
2707 | FRAME_RELATED_P, set the RTX_FRAME_RELATED_P flag on the insns. | |
2708 | Does nothing if the offset is zero. */ | |
2709 | ||
2710 | static void | |
2711 | emit_add_sp_const (HOST_WIDE_INT offset, bool frame_related_p) | |
2712 | { | |
2713 | rtx to_add = GEN_INT (offset); | |
2714 | rtx orig_to_add = to_add; | |
de089fe5 | 2715 | rtx_insn *insn; |
5aa04b01 | 2716 | |
2717 | if (offset == 0) | |
2718 | return; | |
2719 | ||
2720 | if (offset < -32768 || offset > 32767) | |
2721 | { | |
2722 | rtx reg = gen_rtx_REG (SImode, REG_A0); | |
2723 | rtx low = GEN_INT (trunc_int_for_mode (offset, HImode)); | |
2724 | ||
2725 | insn = emit_insn (gen_movsi_high (reg, low)); | |
2726 | if (frame_related_p) | |
2727 | RTX_FRAME_RELATED_P (insn) = 1; | |
2728 | insn = emit_insn (gen_movsi_lo_sum (reg, reg, to_add)); | |
2729 | if (frame_related_p) | |
2730 | RTX_FRAME_RELATED_P (insn) = 1; | |
2731 | to_add = reg; | |
2732 | } | |
2733 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
2734 | to_add)); | |
2735 | if (frame_related_p) | |
2736 | { | |
2737 | if (REG_P (to_add)) | |
2738 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, | |
d1f9b275 | 2739 | gen_rtx_SET (stack_pointer_rtx, |
5aa04b01 | 2740 | gen_rtx_PLUS (Pmode, stack_pointer_rtx, |
2741 | orig_to_add))); | |
2742 | ||
2743 | RTX_FRAME_RELATED_P (insn) = 1; | |
2744 | } | |
2745 | } | |
2746 | ||
2747 | /* Prologue and epilogue. */ | |
2748 | void | |
2749 | c6x_expand_prologue (void) | |
2750 | { | |
2751 | struct c6x_frame frame; | |
de089fe5 | 2752 | rtx_insn *insn; |
2753 | rtx mem; | |
5aa04b01 | 2754 | int nsaved = 0; |
2755 | HOST_WIDE_INT initial_offset, off, added_already; | |
2756 | ||
2757 | c6x_compute_frame_layout (&frame); | |
2758 | ||
2759 | if (flag_stack_usage_info) | |
2760 | current_function_static_stack_size = frame.to_allocate; | |
2761 | ||
2762 | initial_offset = -frame.to_allocate; | |
2763 | if (frame.push_rts) | |
2764 | { | |
2765 | emit_insn (gen_push_rts ()); | |
2766 | nsaved = frame.nregs; | |
2767 | } | |
2768 | ||
2769 | /* If the offsets would be too large for the memory references we will | |
2770 | create to save registers, do the stack allocation in two parts. | |
2771 | Ensure by subtracting 8 that we don't store to the word pointed to | |
2772 | by the stack pointer. */ | |
2773 | if (initial_offset < -32768) | |
2774 | initial_offset = -frame.frame_pointer_offset - 8; | |
2775 | ||
2776 | if (frame.to_allocate > 0) | |
2777 | gcc_assert (initial_offset != 0); | |
2778 | ||
2779 | off = -initial_offset + 4 - frame.padding0; | |
2780 | ||
2781 | mem = gen_frame_mem (Pmode, stack_pointer_rtx); | |
2782 | ||
2783 | added_already = 0; | |
2784 | if (frame_pointer_needed) | |
2785 | { | |
2786 | rtx fp_reg = gen_rtx_REG (SImode, REG_A15); | |
2787 | /* We go through some contortions here to both follow the ABI's | |
2788 | recommendation that FP == incoming SP, and to avoid writing or | |
2789 | reading the word pointed to by the stack pointer. */ | |
2790 | rtx addr = gen_rtx_POST_MODIFY (Pmode, stack_pointer_rtx, | |
2791 | gen_rtx_PLUS (Pmode, stack_pointer_rtx, | |
2792 | GEN_INT (-8))); | |
2793 | insn = emit_move_insn (gen_frame_mem (Pmode, addr), fp_reg); | |
2794 | RTX_FRAME_RELATED_P (insn) = 1; | |
2795 | nsaved++; | |
2796 | insn = emit_insn (gen_addsi3 (hard_frame_pointer_rtx, stack_pointer_rtx, | |
2797 | GEN_INT (8))); | |
2798 | RTX_FRAME_RELATED_P (insn) = 1; | |
2799 | off -= 4; | |
2800 | added_already = -8; | |
2801 | } | |
2802 | ||
2803 | emit_add_sp_const (initial_offset - added_already, true); | |
2804 | ||
2805 | if (nsaved < frame.nregs) | |
2806 | { | |
2807 | unsigned i; | |
2808 | ||
2809 | for (i = 0; i < N_SAVE_ORDER; i++) | |
2810 | { | |
2811 | int idx = N_SAVE_ORDER - i - 1; | |
2812 | unsigned regno = reg_save_order[idx]; | |
2813 | rtx reg; | |
3754d046 | 2814 | machine_mode save_mode = SImode; |
5aa04b01 | 2815 | |
2816 | if (regno == REG_A15 && frame_pointer_needed) | |
2817 | /* Already saved. */ | |
2818 | continue; | |
2819 | if (!c6x_save_reg (regno)) | |
2820 | continue; | |
2821 | ||
2822 | if (TARGET_STDW && (off & 4) == 0 && off <= 256 | |
2823 | && (regno & 1) == 1 | |
2824 | && i + 1 < N_SAVE_ORDER | |
2825 | && reg_save_order[idx - 1] == regno - 1 | |
2826 | && c6x_save_reg (regno - 1)) | |
2827 | { | |
2828 | save_mode = DImode; | |
2829 | regno--; | |
2830 | i++; | |
2831 | } | |
2832 | reg = gen_rtx_REG (save_mode, regno); | |
2833 | off -= GET_MODE_SIZE (save_mode); | |
2834 | ||
2835 | insn = emit_move_insn (adjust_address (mem, save_mode, off), | |
2836 | reg); | |
2837 | RTX_FRAME_RELATED_P (insn) = 1; | |
2838 | ||
61f54514 | 2839 | nsaved += hard_regno_nregs (regno, save_mode); |
5aa04b01 | 2840 | } |
2841 | } | |
2842 | gcc_assert (nsaved == frame.nregs); | |
2843 | emit_add_sp_const (-frame.to_allocate - initial_offset, true); | |
2844 | if (must_reload_pic_reg_p ()) | |
2845 | { | |
2846 | if (dsbt_decl == NULL) | |
2847 | { | |
2848 | tree t; | |
2849 | ||
2850 | t = build_index_type (integer_one_node); | |
2851 | t = build_array_type (integer_type_node, t); | |
2852 | t = build_decl (BUILTINS_LOCATION, VAR_DECL, | |
2853 | get_identifier ("__c6xabi_DSBT_BASE"), t); | |
2854 | DECL_ARTIFICIAL (t) = 1; | |
2855 | DECL_IGNORED_P (t) = 1; | |
2856 | DECL_EXTERNAL (t) = 1; | |
2857 | TREE_STATIC (t) = 1; | |
2858 | TREE_PUBLIC (t) = 1; | |
2859 | TREE_USED (t) = 1; | |
2860 | ||
2861 | dsbt_decl = t; | |
2862 | } | |
2863 | emit_insn (gen_setup_dsbt (pic_offset_table_rtx, | |
2864 | XEXP (DECL_RTL (dsbt_decl), 0))); | |
2865 | } | |
2866 | } | |
2867 | ||
2868 | void | |
2869 | c6x_expand_epilogue (bool sibcall) | |
2870 | { | |
2871 | unsigned i; | |
2872 | struct c6x_frame frame; | |
2873 | rtx mem; | |
2874 | HOST_WIDE_INT off; | |
2875 | int nsaved = 0; | |
2876 | ||
2877 | c6x_compute_frame_layout (&frame); | |
2878 | ||
2879 | mem = gen_frame_mem (Pmode, stack_pointer_rtx); | |
2880 | ||
2881 | /* Insert a dummy set/use of the stack pointer. This creates a | |
2882 | scheduler barrier between the prologue saves and epilogue restores. */ | |
2883 | emit_insn (gen_epilogue_barrier (stack_pointer_rtx, stack_pointer_rtx)); | |
2884 | ||
2885 | /* If the offsets would be too large for the memory references we will | |
2886 | create to restore registers, do a preliminary stack adjustment here. */ | |
2887 | off = frame.to_allocate - frame.frame_pointer_offset + frame.padding1; | |
2888 | if (frame.push_rts) | |
2889 | { | |
2890 | nsaved = frame.nregs; | |
2891 | } | |
2892 | else | |
2893 | { | |
2894 | if (frame.to_allocate > 32768) | |
2895 | { | |
2896 | /* Don't add the entire offset so that we leave an unused word | |
2897 | above the stack pointer. */ | |
2898 | emit_add_sp_const ((off - 16) & ~7, false); | |
2899 | off &= 7; | |
2900 | off += 16; | |
2901 | } | |
2902 | for (i = 0; i < N_SAVE_ORDER; i++) | |
2903 | { | |
2904 | unsigned regno = reg_save_order[i]; | |
2905 | rtx reg; | |
3754d046 | 2906 | machine_mode save_mode = SImode; |
5aa04b01 | 2907 | |
2908 | if (!c6x_save_reg (regno)) | |
2909 | continue; | |
2910 | if (regno == REG_A15 && frame_pointer_needed) | |
2911 | continue; | |
2912 | ||
2913 | if (TARGET_STDW && (off & 4) == 0 && off < 256 | |
2914 | && (regno & 1) == 0 | |
2915 | && i + 1 < N_SAVE_ORDER | |
2916 | && reg_save_order[i + 1] == regno + 1 | |
2917 | && c6x_save_reg (regno + 1)) | |
2918 | { | |
2919 | save_mode = DImode; | |
2920 | i++; | |
2921 | } | |
2922 | reg = gen_rtx_REG (save_mode, regno); | |
2923 | ||
2924 | emit_move_insn (reg, adjust_address (mem, save_mode, off)); | |
2925 | ||
2926 | off += GET_MODE_SIZE (save_mode); | |
61f54514 | 2927 | nsaved += hard_regno_nregs (regno, save_mode); |
5aa04b01 | 2928 | } |
2929 | } | |
2930 | if (!frame_pointer_needed) | |
2931 | emit_add_sp_const (off + frame.padding0 - 4, false); | |
2932 | else | |
2933 | { | |
2934 | rtx fp_reg = gen_rtx_REG (SImode, REG_A15); | |
2935 | rtx addr = gen_rtx_PRE_MODIFY (Pmode, stack_pointer_rtx, | |
2936 | gen_rtx_PLUS (Pmode, stack_pointer_rtx, | |
2937 | GEN_INT (8))); | |
2938 | emit_insn (gen_addsi3 (stack_pointer_rtx, hard_frame_pointer_rtx, | |
2939 | GEN_INT (-8))); | |
2940 | emit_move_insn (fp_reg, gen_frame_mem (Pmode, addr)); | |
2941 | nsaved++; | |
2942 | } | |
2943 | gcc_assert (nsaved == frame.nregs); | |
2944 | if (!sibcall) | |
2945 | { | |
2946 | if (frame.push_rts) | |
2947 | emit_jump_insn (gen_pop_rts ()); | |
2948 | else | |
2949 | emit_jump_insn (gen_return_internal (gen_rtx_REG (SImode, | |
2950 | RETURN_ADDR_REGNO))); | |
2951 | } | |
2952 | } | |
2953 | ||
2954 | /* Return the value of the return address for the frame COUNT steps up | |
2955 | from the current frame, after the prologue. | |
2956 | We punt for everything but the current frame by returning const0_rtx. */ | |
2957 | ||
2958 | rtx | |
2959 | c6x_return_addr_rtx (int count) | |
2960 | { | |
2961 | if (count != 0) | |
2962 | return const0_rtx; | |
2963 | ||
2964 | return get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNO); | |
2965 | } | |
2966 | \f | |
2967 | /* Return true iff TYPE is one of the shadow types. */ | |
2968 | static bool | |
2969 | shadow_type_p (enum attr_type type) | |
2970 | { | |
2971 | return (type == TYPE_SHADOW || type == TYPE_LOAD_SHADOW | |
2972 | || type == TYPE_MULT_SHADOW); | |
2973 | } | |
2974 | ||
2975 | /* Return true iff INSN is a shadow pattern. */ | |
2976 | static bool | |
ed3e6e5d | 2977 | shadow_p (rtx_insn *insn) |
5aa04b01 | 2978 | { |
2979 | if (!NONDEBUG_INSN_P (insn) || recog_memoized (insn) < 0) | |
2980 | return false; | |
2981 | return shadow_type_p (get_attr_type (insn)); | |
2982 | } | |
2983 | ||
2984 | /* Return true iff INSN is a shadow or blockage pattern. */ | |
2985 | static bool | |
ed3e6e5d | 2986 | shadow_or_blockage_p (rtx_insn *insn) |
5aa04b01 | 2987 | { |
2988 | enum attr_type type; | |
2989 | if (!NONDEBUG_INSN_P (insn) || recog_memoized (insn) < 0) | |
2990 | return false; | |
2991 | type = get_attr_type (insn); | |
2992 | return shadow_type_p (type) || type == TYPE_BLOCKAGE; | |
2993 | } | |
2994 | \f | |
2995 | /* Translate UNITS into a bitmask of units we can reserve for this | |
2996 | insn. */ | |
2997 | static int | |
2998 | get_reservation_flags (enum attr_units units) | |
2999 | { | |
3000 | switch (units) | |
3001 | { | |
3002 | case UNITS_D: | |
3003 | case UNITS_D_ADDR: | |
3004 | return RESERVATION_FLAG_D; | |
3005 | case UNITS_L: | |
3006 | return RESERVATION_FLAG_L; | |
3007 | case UNITS_S: | |
3008 | return RESERVATION_FLAG_S; | |
3009 | case UNITS_M: | |
3010 | return RESERVATION_FLAG_M; | |
3011 | case UNITS_LS: | |
3012 | return RESERVATION_FLAG_LS; | |
3013 | case UNITS_DL: | |
3014 | return RESERVATION_FLAG_DL; | |
3015 | case UNITS_DS: | |
3016 | return RESERVATION_FLAG_DS; | |
3017 | case UNITS_DLS: | |
3018 | return RESERVATION_FLAG_DLS; | |
3019 | default: | |
3020 | return 0; | |
3021 | } | |
3022 | } | |
3023 | ||
3024 | /* Compute the side of the machine used by INSN, which reserves UNITS. | |
3025 | This must match the reservations in the scheduling description. */ | |
3026 | static int | |
d3ffa7b4 | 3027 | get_insn_side (rtx_insn *insn, enum attr_units units) |
5aa04b01 | 3028 | { |
3029 | if (units == UNITS_D_ADDR) | |
3030 | return (get_attr_addr_regfile (insn) == ADDR_REGFILE_A ? 0 : 1); | |
3031 | else | |
3032 | { | |
3033 | enum attr_dest_regfile rf = get_attr_dest_regfile (insn); | |
3034 | if (rf == DEST_REGFILE_ANY) | |
3035 | return get_attr_type (insn) == TYPE_BRANCH ? 0 : 1; | |
3036 | else | |
3037 | return rf == DEST_REGFILE_A ? 0 : 1; | |
3038 | } | |
3039 | } | |
3040 | ||
3041 | /* After scheduling, walk the insns between HEAD and END and assign unit | |
3042 | reservations. */ | |
3043 | static void | |
91a55c11 | 3044 | assign_reservations (rtx_insn *head, rtx_insn *end) |
5aa04b01 | 3045 | { |
91a55c11 | 3046 | rtx_insn *insn; |
5aa04b01 | 3047 | for (insn = head; insn != NEXT_INSN (end); insn = NEXT_INSN (insn)) |
3048 | { | |
87ded687 | 3049 | unsigned int sched_mask, reserved; |
91a55c11 | 3050 | rtx_insn *within, *last; |
5aa04b01 | 3051 | int pass; |
3052 | int rsrv[2]; | |
3053 | int rsrv_count[2][4]; | |
87ded687 | 3054 | int i; |
5aa04b01 | 3055 | |
3056 | if (GET_MODE (insn) != TImode) | |
3057 | continue; | |
3058 | ||
87ded687 | 3059 | reserved = 0; |
91a55c11 | 3060 | last = NULL; |
87ded687 | 3061 | /* Find the last insn in the packet. It has a state recorded for it, |
3062 | which we can use to determine the units we should be using. */ | |
3063 | for (within = insn; | |
3064 | (within != NEXT_INSN (end) | |
3065 | && (within == insn || GET_MODE (within) != TImode)); | |
3066 | within = NEXT_INSN (within)) | |
3067 | { | |
3068 | int icode; | |
3069 | if (!NONDEBUG_INSN_P (within)) | |
3070 | continue; | |
3071 | icode = recog_memoized (within); | |
3072 | if (icode < 0) | |
3073 | continue; | |
3074 | if (shadow_p (within)) | |
3075 | continue; | |
3076 | if (INSN_INFO_ENTRY (INSN_UID (within)).reservation != 0) | |
3077 | reserved |= 1 << INSN_INFO_ENTRY (INSN_UID (within)).reservation; | |
3078 | last = within; | |
3079 | } | |
3080 | if (last == NULL_RTX) | |
3081 | continue; | |
3082 | ||
3083 | sched_mask = INSN_INFO_ENTRY (INSN_UID (last)).unit_mask; | |
3084 | sched_mask &= ~reserved; | |
3085 | ||
5aa04b01 | 3086 | memset (rsrv_count, 0, sizeof rsrv_count); |
87ded687 | 3087 | rsrv[0] = rsrv[1] = ~0; |
3088 | for (i = 0; i < 8; i++) | |
3089 | { | |
3090 | int side = i / 4; | |
3091 | int unit = i & 3; | |
3092 | unsigned unit_bit = 1 << (unit + side * UNIT_QID_SIDE_OFFSET); | |
3093 | /* Clear the bits which we expect to reserve in the following loop, | |
3094 | leaving the ones set which aren't present in the scheduler's | |
3095 | state and shouldn't be reserved. */ | |
3096 | if (sched_mask & unit_bit) | |
3097 | rsrv[i / 4] &= ~(1 << unit); | |
3098 | } | |
5aa04b01 | 3099 | |
3100 | /* Walk through the insns that occur in the same cycle. We use multiple | |
3101 | passes to assign units, assigning for insns with the most specific | |
3102 | requirements first. */ | |
3103 | for (pass = 0; pass < 4; pass++) | |
3104 | for (within = insn; | |
3105 | (within != NEXT_INSN (end) | |
3106 | && (within == insn || GET_MODE (within) != TImode)); | |
3107 | within = NEXT_INSN (within)) | |
3108 | { | |
87ded687 | 3109 | int uid = INSN_UID (within); |
5aa04b01 | 3110 | int this_rsrv, side; |
3111 | int icode; | |
3112 | enum attr_units units; | |
87ded687 | 3113 | enum attr_type type; |
5aa04b01 | 3114 | int j; |
3115 | ||
3116 | if (!NONDEBUG_INSN_P (within)) | |
3117 | continue; | |
3118 | icode = recog_memoized (within); | |
3119 | if (icode < 0) | |
3120 | continue; | |
87ded687 | 3121 | if (INSN_INFO_ENTRY (uid).reservation != 0) |
3122 | continue; | |
5aa04b01 | 3123 | units = get_attr_units (within); |
87ded687 | 3124 | type = get_attr_type (within); |
5aa04b01 | 3125 | this_rsrv = get_reservation_flags (units); |
3126 | if (this_rsrv == 0) | |
3127 | continue; | |
3128 | side = get_insn_side (within, units); | |
3129 | ||
87ded687 | 3130 | /* Certain floating point instructions are treated specially. If |
3131 | an insn can choose between units it can reserve, and its | |
3132 | reservation spans more than one cycle, the reservation contains | |
3133 | special markers in the first cycle to help us reconstruct what | |
3134 | the automaton chose. */ | |
3135 | if ((type == TYPE_ADDDP || type == TYPE_FP4) | |
3136 | && units == UNITS_LS) | |
3137 | { | |
3138 | int test1_code = ((type == TYPE_FP4 ? UNIT_QID_FPL1 : UNIT_QID_ADDDPL1) | |
3139 | + side * UNIT_QID_SIDE_OFFSET); | |
3140 | int test2_code = ((type == TYPE_FP4 ? UNIT_QID_FPS1 : UNIT_QID_ADDDPS1) | |
3141 | + side * UNIT_QID_SIDE_OFFSET); | |
3142 | if ((sched_mask & (1 << test1_code)) != 0) | |
3143 | { | |
3144 | this_rsrv = RESERVATION_FLAG_L; | |
3145 | sched_mask &= ~(1 << test1_code); | |
3146 | } | |
3147 | else if ((sched_mask & (1 << test2_code)) != 0) | |
3148 | { | |
3149 | this_rsrv = RESERVATION_FLAG_S; | |
3150 | sched_mask &= ~(1 << test2_code); | |
3151 | } | |
3152 | } | |
3153 | ||
5aa04b01 | 3154 | if ((this_rsrv & (this_rsrv - 1)) == 0) |
3155 | { | |
87ded687 | 3156 | int t = exact_log2 (this_rsrv) + side * UNIT_QID_SIDE_OFFSET; |
5aa04b01 | 3157 | rsrv[side] |= this_rsrv; |
87ded687 | 3158 | INSN_INFO_ENTRY (uid).reservation = t; |
5aa04b01 | 3159 | continue; |
3160 | } | |
3161 | ||
3162 | if (pass == 1) | |
3163 | { | |
3164 | for (j = 0; j < 4; j++) | |
3165 | if (this_rsrv & (1 << j)) | |
3166 | rsrv_count[side][j]++; | |
3167 | continue; | |
3168 | } | |
3169 | if ((pass == 2 && this_rsrv != RESERVATION_FLAG_DLS) | |
3170 | || (pass == 3 && this_rsrv == RESERVATION_FLAG_DLS)) | |
3171 | { | |
3172 | int best = -1, best_cost = INT_MAX; | |
3173 | for (j = 0; j < 4; j++) | |
3174 | if ((this_rsrv & (1 << j)) | |
3175 | && !(rsrv[side] & (1 << j)) | |
3176 | && rsrv_count[side][j] < best_cost) | |
3177 | { | |
3178 | best_cost = rsrv_count[side][j]; | |
3179 | best = j; | |
3180 | } | |
3181 | gcc_assert (best != -1); | |
3182 | rsrv[side] |= 1 << best; | |
3183 | for (j = 0; j < 4; j++) | |
3184 | if ((this_rsrv & (1 << j)) && j != best) | |
3185 | rsrv_count[side][j]--; | |
3186 | ||
87ded687 | 3187 | INSN_INFO_ENTRY (uid).reservation |
3188 | = best + side * UNIT_QID_SIDE_OFFSET; | |
5aa04b01 | 3189 | } |
3190 | } | |
3191 | } | |
3192 | } | |
758df283 | 3193 | |
3194 | /* Return a factor by which to weight unit imbalances for a reservation | |
3195 | R. */ | |
3196 | static int | |
3197 | unit_req_factor (enum unitreqs r) | |
3198 | { | |
3199 | switch (r) | |
3200 | { | |
3201 | case UNIT_REQ_D: | |
3202 | case UNIT_REQ_L: | |
3203 | case UNIT_REQ_S: | |
3204 | case UNIT_REQ_M: | |
3205 | case UNIT_REQ_X: | |
3206 | case UNIT_REQ_T: | |
3207 | return 1; | |
3208 | case UNIT_REQ_DL: | |
3209 | case UNIT_REQ_LS: | |
3210 | case UNIT_REQ_DS: | |
3211 | return 2; | |
3212 | case UNIT_REQ_DLS: | |
3213 | return 3; | |
3214 | default: | |
3215 | gcc_unreachable (); | |
3216 | } | |
3217 | } | |
3218 | ||
3219 | /* Examine INSN, and store in REQ1/SIDE1 and REQ2/SIDE2 the unit | |
3220 | requirements. Returns zero if INSN can't be handled, otherwise | |
3221 | either one or two to show how many of the two pairs are in use. | |
3222 | REQ1 is always used, it holds what is normally thought of as the | |
3223 | instructions reservation, e.g. UNIT_REQ_DL. REQ2 is used to either | |
3224 | describe a cross path, or for loads/stores, the T unit. */ | |
3225 | static int | |
ed3e6e5d | 3226 | get_unit_reqs (rtx_insn *insn, int *req1, int *side1, int *req2, int *side2) |
758df283 | 3227 | { |
3228 | enum attr_units units; | |
3229 | enum attr_cross cross; | |
3230 | int side, req; | |
3231 | ||
3232 | if (!NONDEBUG_INSN_P (insn) || recog_memoized (insn) < 0) | |
3233 | return 0; | |
3234 | units = get_attr_units (insn); | |
3235 | if (units == UNITS_UNKNOWN) | |
3236 | return 0; | |
3237 | side = get_insn_side (insn, units); | |
3238 | cross = get_attr_cross (insn); | |
3239 | ||
3240 | req = (units == UNITS_D ? UNIT_REQ_D | |
3241 | : units == UNITS_D_ADDR ? UNIT_REQ_D | |
3242 | : units == UNITS_DL ? UNIT_REQ_DL | |
3243 | : units == UNITS_DS ? UNIT_REQ_DS | |
3244 | : units == UNITS_L ? UNIT_REQ_L | |
3245 | : units == UNITS_LS ? UNIT_REQ_LS | |
3246 | : units == UNITS_S ? UNIT_REQ_S | |
3247 | : units == UNITS_M ? UNIT_REQ_M | |
3248 | : units == UNITS_DLS ? UNIT_REQ_DLS | |
3249 | : -1); | |
3250 | gcc_assert (req != -1); | |
3251 | *req1 = req; | |
3252 | *side1 = side; | |
3253 | if (units == UNITS_D_ADDR) | |
3254 | { | |
3255 | *req2 = UNIT_REQ_T; | |
3256 | *side2 = side ^ (cross == CROSS_Y ? 1 : 0); | |
3257 | return 2; | |
3258 | } | |
3259 | else if (cross == CROSS_Y) | |
3260 | { | |
3261 | *req2 = UNIT_REQ_X; | |
3262 | *side2 = side; | |
3263 | return 2; | |
3264 | } | |
3265 | return 1; | |
3266 | } | |
3267 | ||
3268 | /* Walk the insns between and including HEAD and TAIL, and mark the | |
3269 | resource requirements in the unit_reqs table. */ | |
3270 | static void | |
91a55c11 | 3271 | count_unit_reqs (unit_req_table reqs, rtx_insn *head, rtx_insn *tail) |
758df283 | 3272 | { |
91a55c11 | 3273 | rtx_insn *insn; |
758df283 | 3274 | |
3275 | memset (reqs, 0, sizeof (unit_req_table)); | |
3276 | ||
3277 | for (insn = head; insn != NEXT_INSN (tail); insn = NEXT_INSN (insn)) | |
3278 | { | |
3279 | int side1, side2, req1, req2; | |
3280 | ||
3281 | switch (get_unit_reqs (insn, &req1, &side1, &req2, &side2)) | |
3282 | { | |
3283 | case 2: | |
3284 | reqs[side2][req2]++; | |
3285 | /* fall through */ | |
3286 | case 1: | |
3287 | reqs[side1][req1]++; | |
3288 | break; | |
3289 | } | |
3290 | } | |
3291 | } | |
3292 | ||
3293 | /* Update the table REQS by merging more specific unit reservations into | |
3294 | more general ones, i.e. counting (for example) UNIT_REQ_D also in | |
3295 | UNIT_REQ_DL, DS, and DLS. */ | |
3296 | static void | |
3297 | merge_unit_reqs (unit_req_table reqs) | |
3298 | { | |
3299 | int side; | |
3300 | for (side = 0; side < 2; side++) | |
3301 | { | |
3302 | int d = reqs[side][UNIT_REQ_D]; | |
3303 | int l = reqs[side][UNIT_REQ_L]; | |
3304 | int s = reqs[side][UNIT_REQ_S]; | |
3305 | int dl = reqs[side][UNIT_REQ_DL]; | |
3306 | int ls = reqs[side][UNIT_REQ_LS]; | |
3307 | int ds = reqs[side][UNIT_REQ_DS]; | |
3308 | ||
3309 | reqs[side][UNIT_REQ_DL] += d; | |
3310 | reqs[side][UNIT_REQ_DL] += l; | |
3311 | reqs[side][UNIT_REQ_DS] += d; | |
3312 | reqs[side][UNIT_REQ_DS] += s; | |
3313 | reqs[side][UNIT_REQ_LS] += l; | |
3314 | reqs[side][UNIT_REQ_LS] += s; | |
3315 | reqs[side][UNIT_REQ_DLS] += ds + dl + ls + d + l + s; | |
3316 | } | |
3317 | } | |
3318 | ||
9a4c7d5b | 3319 | /* Examine the table REQS and return a measure of unit imbalance by comparing |
3320 | the two sides of the machine. If, for example, D1 is used twice and D2 | |
3321 | used not at all, the return value should be 1 in the absence of other | |
3322 | imbalances. */ | |
3323 | static int | |
3324 | unit_req_imbalance (unit_req_table reqs) | |
3325 | { | |
3326 | int val = 0; | |
3327 | int i; | |
3328 | ||
3329 | for (i = 0; i < UNIT_REQ_MAX; i++) | |
3330 | { | |
6d004ec3 | 3331 | int factor = unit_req_factor ((enum unitreqs) i); |
9a4c7d5b | 3332 | int diff = abs (reqs[0][i] - reqs[1][i]); |
3333 | val += (diff + factor - 1) / factor / 2; | |
3334 | } | |
3335 | return val; | |
3336 | } | |
3337 | ||
758df283 | 3338 | /* Return the resource-constrained minimum iteration interval given the |
3339 | data in the REQS table. This must have been processed with | |
3340 | merge_unit_reqs already. */ | |
3341 | static int | |
3342 | res_mii (unit_req_table reqs) | |
3343 | { | |
3344 | int side, req; | |
3345 | int worst = 1; | |
3346 | for (side = 0; side < 2; side++) | |
3347 | for (req = 0; req < UNIT_REQ_MAX; req++) | |
3348 | { | |
6d004ec3 | 3349 | int factor = unit_req_factor ((enum unitreqs) req); |
758df283 | 3350 | worst = MAX ((reqs[side][UNIT_REQ_D] + factor - 1) / factor, worst); |
3351 | } | |
3352 | ||
3353 | return worst; | |
3354 | } | |
9a4c7d5b | 3355 | |
3356 | /* Examine INSN, and store in PMASK1 and PMASK2 bitmasks that represent | |
3357 | the operands that are involved in the (up to) two reservations, as | |
3358 | found by get_unit_reqs. Return true if we did this successfully, false | |
3359 | if we couldn't identify what to do with INSN. */ | |
3360 | static bool | |
ed3e6e5d | 3361 | get_unit_operand_masks (rtx_insn *insn, unsigned int *pmask1, |
3362 | unsigned int *pmask2) | |
9a4c7d5b | 3363 | { |
9a4c7d5b | 3364 | enum attr_op_pattern op_pat; |
3365 | ||
3366 | if (recog_memoized (insn) < 0) | |
3367 | return 0; | |
3368 | if (GET_CODE (PATTERN (insn)) == COND_EXEC) | |
3369 | return false; | |
3370 | extract_insn (insn); | |
3371 | op_pat = get_attr_op_pattern (insn); | |
3372 | if (op_pat == OP_PATTERN_DT) | |
3373 | { | |
3374 | gcc_assert (recog_data.n_operands == 2); | |
3375 | *pmask1 = 1 << 0; | |
3376 | *pmask2 = 1 << 1; | |
3377 | return true; | |
3378 | } | |
3379 | else if (op_pat == OP_PATTERN_TD) | |
3380 | { | |
3381 | gcc_assert (recog_data.n_operands == 2); | |
3382 | *pmask1 = 1 << 1; | |
3383 | *pmask2 = 1 << 0; | |
3384 | return true; | |
3385 | } | |
3386 | else if (op_pat == OP_PATTERN_SXS) | |
3387 | { | |
3388 | gcc_assert (recog_data.n_operands == 3); | |
3389 | *pmask1 = (1 << 0) | (1 << 2); | |
3390 | *pmask2 = 1 << 1; | |
3391 | return true; | |
3392 | } | |
3393 | else if (op_pat == OP_PATTERN_SX) | |
3394 | { | |
3395 | gcc_assert (recog_data.n_operands == 2); | |
3396 | *pmask1 = 1 << 0; | |
3397 | *pmask2 = 1 << 1; | |
3398 | return true; | |
3399 | } | |
3400 | else if (op_pat == OP_PATTERN_SSX) | |
3401 | { | |
3402 | gcc_assert (recog_data.n_operands == 3); | |
3403 | *pmask1 = (1 << 0) | (1 << 1); | |
3404 | *pmask2 = 1 << 2; | |
3405 | return true; | |
3406 | } | |
3407 | return false; | |
3408 | } | |
3409 | ||
3410 | /* Try to replace a register in INSN, which has corresponding rename info | |
3411 | from regrename_analyze in INFO. OP_MASK and ORIG_SIDE provide information | |
3412 | about the operands that must be renamed and the side they are on. | |
3413 | REQS is the table of unit reservations in the loop between HEAD and TAIL. | |
3414 | We recompute this information locally after our transformation, and keep | |
3415 | it only if we managed to improve the balance. */ | |
3416 | static void | |
91a55c11 | 3417 | try_rename_operands (rtx_insn *head, rtx_insn *tail, unit_req_table reqs, |
3418 | rtx insn, | |
9a4c7d5b | 3419 | insn_rr_info *info, unsigned int op_mask, int orig_side) |
3420 | { | |
3421 | enum reg_class super_class = orig_side == 0 ? B_REGS : A_REGS; | |
3422 | HARD_REG_SET unavailable; | |
9a4c7d5b | 3423 | du_head_p this_head; |
3424 | struct du_chain *chain; | |
3425 | int i; | |
3426 | unsigned tmp_mask; | |
3427 | int best_reg, old_reg; | |
1e094109 | 3428 | vec<du_head_p> involved_chains = vNULL; |
9a4c7d5b | 3429 | unit_req_table new_reqs; |
12dcc3b7 | 3430 | bool ok; |
9a4c7d5b | 3431 | |
3432 | for (i = 0, tmp_mask = op_mask; tmp_mask; i++) | |
3433 | { | |
3434 | du_head_p op_chain; | |
3435 | if ((tmp_mask & (1 << i)) == 0) | |
3436 | continue; | |
3437 | if (info->op_info[i].n_chains != 1) | |
3438 | goto out_fail; | |
3439 | op_chain = regrename_chain_from_id (info->op_info[i].heads[0]->id); | |
f1f41a6c | 3440 | involved_chains.safe_push (op_chain); |
9a4c7d5b | 3441 | tmp_mask &= ~(1 << i); |
3442 | } | |
3443 | ||
f1f41a6c | 3444 | if (involved_chains.length () > 1) |
9a4c7d5b | 3445 | goto out_fail; |
3446 | ||
f1f41a6c | 3447 | this_head = involved_chains[0]; |
9a4c7d5b | 3448 | if (this_head->cannot_rename) |
3449 | goto out_fail; | |
3450 | ||
3451 | for (chain = this_head->first; chain; chain = chain->next_use) | |
3452 | { | |
3453 | unsigned int mask1, mask2, mask_changed; | |
3454 | int count, side1, side2, req1, req2; | |
f1f41a6c | 3455 | insn_rr_info *this_rr = &insn_rr[INSN_UID (chain->insn)]; |
9a4c7d5b | 3456 | |
3457 | count = get_unit_reqs (chain->insn, &req1, &side1, &req2, &side2); | |
3458 | ||
3459 | if (count == 0) | |
3460 | goto out_fail; | |
3461 | ||
3462 | if (!get_unit_operand_masks (chain->insn, &mask1, &mask2)) | |
3463 | goto out_fail; | |
3464 | ||
3465 | extract_insn (chain->insn); | |
3466 | ||
3467 | mask_changed = 0; | |
3468 | for (i = 0; i < recog_data.n_operands; i++) | |
3469 | { | |
3470 | int j; | |
3471 | int n_this_op = this_rr->op_info[i].n_chains; | |
3472 | for (j = 0; j < n_this_op; j++) | |
3473 | { | |
3474 | du_head_p other = this_rr->op_info[i].heads[j]; | |
3475 | if (regrename_chain_from_id (other->id) == this_head) | |
3476 | break; | |
3477 | } | |
3478 | if (j == n_this_op) | |
3479 | continue; | |
3480 | ||
3481 | if (n_this_op != 1) | |
3482 | goto out_fail; | |
3483 | mask_changed |= 1 << i; | |
3484 | } | |
3485 | gcc_assert (mask_changed != 0); | |
3486 | if (mask_changed != mask1 && mask_changed != mask2) | |
3487 | goto out_fail; | |
3488 | } | |
3489 | ||
3490 | /* If we get here, we can do the renaming. */ | |
3491 | COMPL_HARD_REG_SET (unavailable, reg_class_contents[(int) super_class]); | |
3492 | ||
3493 | old_reg = this_head->regno; | |
46f1d251 | 3494 | best_reg = |
3495 | find_rename_reg (this_head, super_class, &unavailable, old_reg, true); | |
9a4c7d5b | 3496 | |
12dcc3b7 | 3497 | ok = regrename_do_replace (this_head, best_reg); |
3498 | gcc_assert (ok); | |
9a4c7d5b | 3499 | |
3500 | count_unit_reqs (new_reqs, head, PREV_INSN (tail)); | |
3501 | merge_unit_reqs (new_reqs); | |
3502 | if (dump_file) | |
3503 | { | |
3504 | fprintf (dump_file, "reshuffle for insn %d, op_mask %x, " | |
3505 | "original side %d, new reg %d\n", | |
3506 | INSN_UID (insn), op_mask, orig_side, best_reg); | |
3507 | fprintf (dump_file, " imbalance %d -> %d\n", | |
3508 | unit_req_imbalance (reqs), unit_req_imbalance (new_reqs)); | |
3509 | } | |
3510 | if (unit_req_imbalance (new_reqs) > unit_req_imbalance (reqs)) | |
12dcc3b7 | 3511 | { |
3512 | ok = regrename_do_replace (this_head, old_reg); | |
3513 | gcc_assert (ok); | |
3514 | } | |
9a4c7d5b | 3515 | else |
3516 | memcpy (reqs, new_reqs, sizeof (unit_req_table)); | |
3517 | ||
3518 | out_fail: | |
f1f41a6c | 3519 | involved_chains.release (); |
9a4c7d5b | 3520 | } |
3521 | ||
3522 | /* Find insns in LOOP which would, if shifted to the other side | |
3523 | of the machine, reduce an imbalance in the unit reservations. */ | |
3524 | static void | |
3525 | reshuffle_units (basic_block loop) | |
3526 | { | |
91a55c11 | 3527 | rtx_insn *head = BB_HEAD (loop); |
3528 | rtx_insn *tail = BB_END (loop); | |
3529 | rtx_insn *insn; | |
9a4c7d5b | 3530 | unit_req_table reqs; |
3531 | edge e; | |
3532 | edge_iterator ei; | |
9a4c7d5b | 3533 | bitmap_head bbs; |
3534 | ||
3535 | count_unit_reqs (reqs, head, PREV_INSN (tail)); | |
3536 | merge_unit_reqs (reqs); | |
3537 | ||
3538 | regrename_init (true); | |
3539 | ||
3540 | bitmap_initialize (&bbs, &bitmap_default_obstack); | |
3541 | ||
3542 | FOR_EACH_EDGE (e, ei, loop->preds) | |
6d004ec3 | 3543 | bitmap_set_bit (&bbs, e->src->index); |
3544 | ||
9a4c7d5b | 3545 | bitmap_set_bit (&bbs, loop->index); |
3546 | regrename_analyze (&bbs); | |
3547 | ||
3548 | for (insn = head; insn != NEXT_INSN (tail); insn = NEXT_INSN (insn)) | |
3549 | { | |
3550 | enum attr_units units; | |
9a4c7d5b | 3551 | int count, side1, side2, req1, req2; |
3552 | unsigned int mask1, mask2; | |
3553 | insn_rr_info *info; | |
3554 | ||
3555 | if (!NONDEBUG_INSN_P (insn)) | |
3556 | continue; | |
3557 | ||
3558 | count = get_unit_reqs (insn, &req1, &side1, &req2, &side2); | |
3559 | ||
3560 | if (count == 0) | |
3561 | continue; | |
3562 | ||
3563 | if (!get_unit_operand_masks (insn, &mask1, &mask2)) | |
3564 | continue; | |
3565 | ||
f1f41a6c | 3566 | info = &insn_rr[INSN_UID (insn)]; |
9a4c7d5b | 3567 | if (info->op_info == NULL) |
3568 | continue; | |
3569 | ||
3570 | if (reqs[side1][req1] > 1 | |
3571 | && reqs[side1][req1] > 2 * reqs[side1 ^ 1][req1]) | |
3572 | { | |
3573 | try_rename_operands (head, tail, reqs, insn, info, mask1, side1); | |
3574 | } | |
3575 | ||
3576 | units = get_attr_units (insn); | |
3577 | if (units == UNITS_D_ADDR) | |
3578 | { | |
3579 | gcc_assert (count == 2); | |
3580 | if (reqs[side2][req2] > 1 | |
3581 | && reqs[side2][req2] > 2 * reqs[side2 ^ 1][req2]) | |
3582 | { | |
3583 | try_rename_operands (head, tail, reqs, insn, info, mask2, side2); | |
3584 | } | |
3585 | } | |
3586 | } | |
3587 | regrename_finish (); | |
3588 | } | |
5aa04b01 | 3589 | \f |
3590 | /* Backend scheduling state. */ | |
3591 | typedef struct c6x_sched_context | |
3592 | { | |
3593 | /* The current scheduler clock, saved in the sched_reorder hook. */ | |
3594 | int curr_sched_clock; | |
3595 | ||
3596 | /* Number of insns issued so far in this cycle. */ | |
3597 | int issued_this_cycle; | |
3598 | ||
3599 | /* We record the time at which each jump occurs in JUMP_CYCLES. The | |
3600 | theoretical maximum for number of jumps in flight is 12: 2 every | |
3601 | cycle, with a latency of 6 cycles each. This is a circular | |
3602 | buffer; JUMP_CYCLE_INDEX is the pointer to the start. Earlier | |
3603 | jumps have a higher index. This array should be accessed through | |
3604 | the jump_cycle function. */ | |
3605 | int jump_cycles[12]; | |
3606 | int jump_cycle_index; | |
3607 | ||
3608 | /* In parallel with jump_cycles, this array records the opposite of | |
3609 | the condition used in each pending jump. This is used to | |
3610 | predicate insns that are scheduled in the jump's delay slots. If | |
3611 | this is NULL_RTX no such predication happens. */ | |
3612 | rtx jump_cond[12]; | |
3613 | ||
3614 | /* Similar to the jump_cycles mechanism, but here we take into | |
3615 | account all insns with delay slots, to avoid scheduling asms into | |
3616 | the delay slots. */ | |
3617 | int delays_finished_at; | |
3618 | ||
3619 | /* The following variable value is the last issued insn. */ | |
91a55c11 | 3620 | rtx_insn *last_scheduled_insn; |
758df283 | 3621 | /* The last issued insn that isn't a shadow of another. */ |
b24ef467 | 3622 | rtx_insn *last_scheduled_iter0; |
5aa04b01 | 3623 | |
87ded687 | 3624 | /* The following variable value is DFA state before issuing the |
3625 | first insn in the current clock cycle. We do not use this member | |
3626 | of the structure directly; we copy the data in and out of | |
3627 | prev_cycle_state. */ | |
3628 | state_t prev_cycle_state_ctx; | |
758df283 | 3629 | |
5aa04b01 | 3630 | int reg_n_accesses[FIRST_PSEUDO_REGISTER]; |
3631 | int reg_n_xaccesses[FIRST_PSEUDO_REGISTER]; | |
3632 | int reg_set_in_cycle[FIRST_PSEUDO_REGISTER]; | |
3633 | ||
3634 | int tmp_reg_n_accesses[FIRST_PSEUDO_REGISTER]; | |
3635 | int tmp_reg_n_xaccesses[FIRST_PSEUDO_REGISTER]; | |
3636 | } *c6x_sched_context_t; | |
3637 | ||
3638 | /* The current scheduling state. */ | |
3639 | static struct c6x_sched_context ss; | |
3640 | ||
9d75589a | 3641 | /* The following variable value is DFA state before issuing the first insn |
87ded687 | 3642 | in the current clock cycle. This is used in c6x_variable_issue for |
3643 | comparison with the state after issuing the last insn in a cycle. */ | |
3644 | static state_t prev_cycle_state; | |
3645 | ||
5aa04b01 | 3646 | /* Set when we discover while processing an insn that it would lead to too |
3647 | many accesses of the same register. */ | |
3648 | static bool reg_access_stall; | |
3649 | ||
758df283 | 3650 | /* The highest insn uid after delayed insns were split, but before loop bodies |
3651 | were copied by the modulo scheduling code. */ | |
3652 | static int sploop_max_uid_iter0; | |
3653 | ||
5aa04b01 | 3654 | /* Look up the jump cycle with index N. For an out-of-bounds N, we return 0, |
3655 | so the caller does not specifically have to test for it. */ | |
3656 | static int | |
3657 | get_jump_cycle (int n) | |
3658 | { | |
3659 | if (n >= 12) | |
3660 | return 0; | |
3661 | n += ss.jump_cycle_index; | |
3662 | if (n >= 12) | |
3663 | n -= 12; | |
3664 | return ss.jump_cycles[n]; | |
3665 | } | |
3666 | ||
3667 | /* Look up the jump condition with index N. */ | |
3668 | static rtx | |
3669 | get_jump_cond (int n) | |
3670 | { | |
3671 | if (n >= 12) | |
3672 | return NULL_RTX; | |
3673 | n += ss.jump_cycle_index; | |
3674 | if (n >= 12) | |
3675 | n -= 12; | |
3676 | return ss.jump_cond[n]; | |
3677 | } | |
3678 | ||
3679 | /* Return the index of the first jump that occurs after CLOCK_VAR. If no jump | |
3680 | has delay slots beyond CLOCK_VAR, return -1. */ | |
3681 | static int | |
3682 | first_jump_index (int clock_var) | |
3683 | { | |
3684 | int retval = -1; | |
3685 | int n = 0; | |
3686 | for (;;) | |
3687 | { | |
3688 | int t = get_jump_cycle (n); | |
3689 | if (t <= clock_var) | |
3690 | break; | |
3691 | retval = n; | |
3692 | n++; | |
3693 | } | |
3694 | return retval; | |
3695 | } | |
3696 | ||
3697 | /* Add a new entry in our scheduling state for a jump that occurs in CYCLE | |
3698 | and has the opposite condition of COND. */ | |
3699 | static void | |
3700 | record_jump (int cycle, rtx cond) | |
3701 | { | |
3702 | if (ss.jump_cycle_index == 0) | |
3703 | ss.jump_cycle_index = 11; | |
3704 | else | |
3705 | ss.jump_cycle_index--; | |
3706 | ss.jump_cycles[ss.jump_cycle_index] = cycle; | |
3707 | ss.jump_cond[ss.jump_cycle_index] = cond; | |
3708 | } | |
3709 | ||
3710 | /* Set the clock cycle of INSN to CYCLE. Also clears the insn's entry in | |
3711 | new_conditions. */ | |
3712 | static void | |
3713 | insn_set_clock (rtx insn, int cycle) | |
3714 | { | |
3715 | unsigned uid = INSN_UID (insn); | |
3716 | ||
3717 | if (uid >= INSN_INFO_LENGTH) | |
f1f41a6c | 3718 | insn_info.safe_grow (uid * 5 / 4 + 10); |
5aa04b01 | 3719 | |
3720 | INSN_INFO_ENTRY (uid).clock = cycle; | |
3721 | INSN_INFO_ENTRY (uid).new_cond = NULL; | |
87ded687 | 3722 | INSN_INFO_ENTRY (uid).reservation = 0; |
5aa04b01 | 3723 | INSN_INFO_ENTRY (uid).ebb_start = false; |
3724 | } | |
3725 | ||
3726 | /* Return the clock cycle we set for the insn with uid UID. */ | |
3727 | static int | |
3728 | insn_uid_get_clock (int uid) | |
3729 | { | |
3730 | return INSN_INFO_ENTRY (uid).clock; | |
3731 | } | |
3732 | ||
3733 | /* Return the clock cycle we set for INSN. */ | |
3734 | static int | |
3735 | insn_get_clock (rtx insn) | |
3736 | { | |
3737 | return insn_uid_get_clock (INSN_UID (insn)); | |
3738 | } | |
3739 | ||
3740 | /* Examine INSN, and if it is a conditional jump of any kind, return | |
3741 | the opposite of the condition in which it branches. Otherwise, | |
3742 | return NULL_RTX. */ | |
3743 | static rtx | |
3744 | condjump_opposite_condition (rtx insn) | |
3745 | { | |
3746 | rtx pat = PATTERN (insn); | |
3747 | int icode = INSN_CODE (insn); | |
3748 | rtx x = NULL; | |
3749 | ||
3750 | if (icode == CODE_FOR_br_true || icode == CODE_FOR_br_false) | |
3751 | { | |
3752 | x = XEXP (SET_SRC (pat), 0); | |
3753 | if (icode == CODE_FOR_br_false) | |
3754 | return x; | |
3755 | } | |
3756 | if (GET_CODE (pat) == COND_EXEC) | |
3757 | { | |
3758 | rtx t = COND_EXEC_CODE (pat); | |
3759 | if ((GET_CODE (t) == PARALLEL | |
3760 | && GET_CODE (XVECEXP (t, 0, 0)) == RETURN) | |
3761 | || (GET_CODE (t) == UNSPEC && XINT (t, 1) == UNSPEC_REAL_JUMP) | |
3762 | || (GET_CODE (t) == SET && SET_DEST (t) == pc_rtx)) | |
3763 | x = COND_EXEC_TEST (pat); | |
3764 | } | |
3765 | ||
3766 | if (x != NULL_RTX) | |
3767 | { | |
3768 | enum rtx_code code = GET_CODE (x); | |
3769 | x = gen_rtx_fmt_ee (code == EQ ? NE : EQ, | |
3770 | GET_MODE (x), XEXP (x, 0), | |
3771 | XEXP (x, 1)); | |
3772 | } | |
3773 | return x; | |
3774 | } | |
3775 | ||
3776 | /* Return true iff COND1 and COND2 are exactly opposite conditions | |
3777 | one of them NE and the other EQ. */ | |
3778 | static bool | |
3779 | conditions_opposite_p (rtx cond1, rtx cond2) | |
3780 | { | |
3781 | return (rtx_equal_p (XEXP (cond1, 0), XEXP (cond2, 0)) | |
3782 | && rtx_equal_p (XEXP (cond1, 1), XEXP (cond2, 1)) | |
3783 | && GET_CODE (cond1) == reverse_condition (GET_CODE (cond2))); | |
3784 | } | |
3785 | ||
3786 | /* Return true if we can add a predicate COND to INSN, or if INSN | |
3787 | already has that predicate. If DOIT is true, also perform the | |
3788 | modification. */ | |
3789 | static bool | |
d3ffa7b4 | 3790 | predicate_insn (rtx_insn *insn, rtx cond, bool doit) |
5aa04b01 | 3791 | { |
3792 | int icode; | |
3793 | if (cond == NULL_RTX) | |
3794 | { | |
3795 | gcc_assert (!doit); | |
3796 | return false; | |
3797 | } | |
3798 | ||
3799 | if (get_attr_predicable (insn) == PREDICABLE_YES | |
3800 | && GET_CODE (PATTERN (insn)) != COND_EXEC) | |
3801 | { | |
3802 | if (doit) | |
3803 | { | |
25516a02 | 3804 | cond = copy_rtx (cond); |
5aa04b01 | 3805 | rtx newpat = gen_rtx_COND_EXEC (VOIDmode, cond, PATTERN (insn)); |
3806 | PATTERN (insn) = newpat; | |
3807 | INSN_CODE (insn) = -1; | |
3808 | } | |
3809 | return true; | |
3810 | } | |
3811 | if (GET_CODE (PATTERN (insn)) == COND_EXEC | |
3812 | && rtx_equal_p (COND_EXEC_TEST (PATTERN (insn)), cond)) | |
3813 | return true; | |
3814 | icode = INSN_CODE (insn); | |
3815 | if (icode == CODE_FOR_real_jump | |
3816 | || icode == CODE_FOR_jump | |
3817 | || icode == CODE_FOR_indirect_jump) | |
3818 | { | |
3819 | rtx pat = PATTERN (insn); | |
3820 | rtx dest = (icode == CODE_FOR_real_jump ? XVECEXP (pat, 0, 0) | |
3821 | : icode == CODE_FOR_jump ? XEXP (SET_SRC (pat), 0) | |
3822 | : SET_SRC (pat)); | |
3823 | if (doit) | |
3824 | { | |
3825 | rtx newpat; | |
3826 | if (REG_P (dest)) | |
3827 | newpat = gen_rtx_COND_EXEC (VOIDmode, cond, PATTERN (insn)); | |
3828 | else | |
3829 | newpat = gen_br_true (cond, XEXP (cond, 0), dest); | |
3830 | PATTERN (insn) = newpat; | |
3831 | INSN_CODE (insn) = -1; | |
3832 | } | |
3833 | return true; | |
3834 | } | |
3835 | if (INSN_CODE (insn) == CODE_FOR_br_true) | |
3836 | { | |
3837 | rtx br_cond = XEXP (SET_SRC (PATTERN (insn)), 0); | |
3838 | return rtx_equal_p (br_cond, cond); | |
3839 | } | |
3840 | if (INSN_CODE (insn) == CODE_FOR_br_false) | |
3841 | { | |
3842 | rtx br_cond = XEXP (SET_SRC (PATTERN (insn)), 0); | |
3843 | return conditions_opposite_p (br_cond, cond); | |
3844 | } | |
3845 | return false; | |
3846 | } | |
3847 | ||
3848 | /* Initialize SC. Used by c6x_init_sched_context and c6x_sched_init. */ | |
3849 | static void | |
3850 | init_sched_state (c6x_sched_context_t sc) | |
3851 | { | |
91a55c11 | 3852 | sc->last_scheduled_insn = NULL; |
b24ef467 | 3853 | sc->last_scheduled_iter0 = NULL; |
5aa04b01 | 3854 | sc->issued_this_cycle = 0; |
3855 | memset (sc->jump_cycles, 0, sizeof sc->jump_cycles); | |
3856 | memset (sc->jump_cond, 0, sizeof sc->jump_cond); | |
3857 | sc->jump_cycle_index = 0; | |
3858 | sc->delays_finished_at = 0; | |
3859 | sc->curr_sched_clock = 0; | |
3860 | ||
87ded687 | 3861 | sc->prev_cycle_state_ctx = xmalloc (dfa_state_size); |
3862 | ||
5aa04b01 | 3863 | memset (sc->reg_n_accesses, 0, sizeof sc->reg_n_accesses); |
3864 | memset (sc->reg_n_xaccesses, 0, sizeof sc->reg_n_xaccesses); | |
3865 | memset (sc->reg_set_in_cycle, 0, sizeof sc->reg_set_in_cycle); | |
87ded687 | 3866 | |
3867 | state_reset (sc->prev_cycle_state_ctx); | |
5aa04b01 | 3868 | } |
3869 | ||
3870 | /* Allocate store for new scheduling context. */ | |
3871 | static void * | |
3872 | c6x_alloc_sched_context (void) | |
3873 | { | |
3874 | return xmalloc (sizeof (struct c6x_sched_context)); | |
3875 | } | |
3876 | ||
3877 | /* If CLEAN_P is true then initializes _SC with clean data, | |
3878 | and from the global context otherwise. */ | |
3879 | static void | |
3880 | c6x_init_sched_context (void *_sc, bool clean_p) | |
3881 | { | |
3882 | c6x_sched_context_t sc = (c6x_sched_context_t) _sc; | |
3883 | ||
3884 | if (clean_p) | |
3885 | { | |
3886 | init_sched_state (sc); | |
3887 | } | |
3888 | else | |
87ded687 | 3889 | { |
3890 | *sc = ss; | |
3891 | sc->prev_cycle_state_ctx = xmalloc (dfa_state_size); | |
3892 | memcpy (sc->prev_cycle_state_ctx, prev_cycle_state, dfa_state_size); | |
3893 | } | |
5aa04b01 | 3894 | } |
3895 | ||
3896 | /* Sets the global scheduling context to the one pointed to by _SC. */ | |
3897 | static void | |
3898 | c6x_set_sched_context (void *_sc) | |
3899 | { | |
3900 | c6x_sched_context_t sc = (c6x_sched_context_t) _sc; | |
3901 | ||
3902 | gcc_assert (sc != NULL); | |
3903 | ss = *sc; | |
87ded687 | 3904 | memcpy (prev_cycle_state, sc->prev_cycle_state_ctx, dfa_state_size); |
3905 | } | |
3906 | ||
3907 | /* Clear data in _SC. */ | |
3908 | static void | |
3909 | c6x_clear_sched_context (void *_sc) | |
3910 | { | |
3911 | c6x_sched_context_t sc = (c6x_sched_context_t) _sc; | |
3912 | gcc_assert (_sc != NULL); | |
3913 | ||
758df283 | 3914 | free (sc->prev_cycle_state_ctx); |
5aa04b01 | 3915 | } |
3916 | ||
3917 | /* Free _SC. */ | |
3918 | static void | |
3919 | c6x_free_sched_context (void *_sc) | |
3920 | { | |
3921 | free (_sc); | |
3922 | } | |
3923 | ||
d452a169 | 3924 | /* True if we are currently performing a preliminary scheduling |
3925 | pass before modulo scheduling; we can't allow the scheduler to | |
3926 | modify instruction patterns using packetization assumptions, | |
3927 | since there will be another scheduling pass later if modulo | |
3928 | scheduling fails. */ | |
3929 | static bool in_hwloop; | |
3930 | ||
5aa04b01 | 3931 | /* Provide information about speculation capabilities, and set the |
3932 | DO_BACKTRACKING flag. */ | |
3933 | static void | |
3934 | c6x_set_sched_flags (spec_info_t spec_info) | |
3935 | { | |
3936 | unsigned int *flags = &(current_sched_info->flags); | |
3937 | ||
3938 | if (*flags & SCHED_EBB) | |
3939 | { | |
effd1640 | 3940 | *flags |= DO_BACKTRACKING | DO_PREDICATION; |
5aa04b01 | 3941 | } |
d452a169 | 3942 | if (in_hwloop) |
3943 | *flags |= DONT_BREAK_DEPENDENCIES; | |
5aa04b01 | 3944 | |
3945 | spec_info->mask = 0; | |
3946 | } | |
3947 | ||
3948 | /* Implement the TARGET_SCHED_ISSUE_RATE hook. */ | |
3949 | ||
3950 | static int | |
3951 | c6x_issue_rate (void) | |
3952 | { | |
3953 | return 8; | |
3954 | } | |
3955 | ||
87ded687 | 3956 | /* Used together with the collapse_ndfa option, this ensures that we reach a |
3957 | deterministic automaton state before trying to advance a cycle. | |
3958 | With collapse_ndfa, genautomata creates advance cycle arcs only for | |
3959 | such deterministic states. */ | |
3960 | ||
3961 | static rtx | |
3962 | c6x_sched_dfa_pre_cycle_insn (void) | |
3963 | { | |
3964 | return const0_rtx; | |
3965 | } | |
3966 | ||
5aa04b01 | 3967 | /* We're beginning a new block. Initialize data structures as necessary. */ |
3968 | ||
3969 | static void | |
3970 | c6x_sched_init (FILE *dump ATTRIBUTE_UNUSED, | |
3971 | int sched_verbose ATTRIBUTE_UNUSED, | |
3972 | int max_ready ATTRIBUTE_UNUSED) | |
3973 | { | |
87ded687 | 3974 | if (prev_cycle_state == NULL) |
3975 | { | |
3976 | prev_cycle_state = xmalloc (dfa_state_size); | |
3977 | } | |
5aa04b01 | 3978 | init_sched_state (&ss); |
87ded687 | 3979 | state_reset (prev_cycle_state); |
3980 | } | |
3981 | ||
3982 | /* We are about to being issuing INSN. Return nonzero if we cannot | |
3983 | issue it on given cycle CLOCK and return zero if we should not sort | |
3984 | the ready queue on the next clock start. | |
3985 | For C6X, we use this function just to copy the previous DFA state | |
3986 | for comparison purposes. */ | |
3987 | ||
3988 | static int | |
3989 | c6x_dfa_new_cycle (FILE *dump ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED, | |
18282db0 | 3990 | rtx_insn *insn ATTRIBUTE_UNUSED, |
3991 | int last_clock ATTRIBUTE_UNUSED, | |
87ded687 | 3992 | int clock ATTRIBUTE_UNUSED, int *sort_p ATTRIBUTE_UNUSED) |
3993 | { | |
3994 | if (clock != last_clock) | |
3995 | memcpy (prev_cycle_state, curr_state, dfa_state_size); | |
3996 | return 0; | |
5aa04b01 | 3997 | } |
3998 | ||
3999 | static void | |
4000 | c6x_mark_regno_read (int regno, bool cross) | |
4001 | { | |
4002 | int t = ++ss.tmp_reg_n_accesses[regno]; | |
4003 | ||
4004 | if (t > 4) | |
4005 | reg_access_stall = true; | |
4006 | ||
4007 | if (cross) | |
4008 | { | |
4009 | int set_cycle = ss.reg_set_in_cycle[regno]; | |
4010 | /* This must be done in this way rather than by tweaking things in | |
4011 | adjust_cost, since the stall occurs even for insns with opposite | |
4012 | predicates, and the scheduler may not even see a dependency. */ | |
4013 | if (set_cycle > 0 && set_cycle == ss.curr_sched_clock) | |
4014 | reg_access_stall = true; | |
4015 | /* This doesn't quite do anything yet as we're only modeling one | |
4016 | x unit. */ | |
4017 | ++ss.tmp_reg_n_xaccesses[regno]; | |
4018 | } | |
4019 | } | |
4020 | ||
4021 | /* Note that REG is read in the insn being examined. If CROSS, it | |
4022 | means the access is through a cross path. Update the temporary reg | |
4023 | access arrays, and set REG_ACCESS_STALL if the insn can't be issued | |
4024 | in the current cycle. */ | |
4025 | ||
4026 | static void | |
4027 | c6x_mark_reg_read (rtx reg, bool cross) | |
4028 | { | |
4029 | unsigned regno = REGNO (reg); | |
10fa8f76 | 4030 | unsigned nregs = REG_NREGS (reg); |
5aa04b01 | 4031 | |
4032 | while (nregs-- > 0) | |
4033 | c6x_mark_regno_read (regno + nregs, cross); | |
4034 | } | |
4035 | ||
4036 | /* Note that register REG is written in cycle CYCLES. */ | |
4037 | ||
4038 | static void | |
4039 | c6x_mark_reg_written (rtx reg, int cycles) | |
4040 | { | |
4041 | unsigned regno = REGNO (reg); | |
10fa8f76 | 4042 | unsigned nregs = REG_NREGS (reg); |
5aa04b01 | 4043 | |
4044 | while (nregs-- > 0) | |
4045 | ss.reg_set_in_cycle[regno + nregs] = cycles; | |
4046 | } | |
4047 | ||
4048 | /* Update the register state information for an instruction whose | |
4049 | body is X. Return true if the instruction has to be delayed until the | |
4050 | next cycle. */ | |
4051 | ||
4052 | static bool | |
ed3e6e5d | 4053 | c6x_registers_update (rtx_insn *insn) |
5aa04b01 | 4054 | { |
4055 | enum attr_cross cross; | |
4056 | enum attr_dest_regfile destrf; | |
4057 | int i, nops; | |
4058 | rtx x; | |
4059 | ||
4060 | if (!reload_completed || recog_memoized (insn) < 0) | |
4061 | return false; | |
4062 | ||
4063 | reg_access_stall = false; | |
4064 | memcpy (ss.tmp_reg_n_accesses, ss.reg_n_accesses, | |
4065 | sizeof ss.tmp_reg_n_accesses); | |
4066 | memcpy (ss.tmp_reg_n_xaccesses, ss.reg_n_xaccesses, | |
4067 | sizeof ss.tmp_reg_n_xaccesses); | |
4068 | ||
4069 | extract_insn (insn); | |
4070 | ||
4071 | cross = get_attr_cross (insn); | |
4072 | destrf = get_attr_dest_regfile (insn); | |
4073 | ||
4074 | nops = recog_data.n_operands; | |
4075 | x = PATTERN (insn); | |
4076 | if (GET_CODE (x) == COND_EXEC) | |
4077 | { | |
4078 | c6x_mark_reg_read (XEXP (XEXP (x, 0), 0), false); | |
4079 | nops -= 2; | |
4080 | } | |
4081 | ||
4082 | for (i = 0; i < nops; i++) | |
4083 | { | |
4084 | rtx op = recog_data.operand[i]; | |
4085 | if (recog_data.operand_type[i] == OP_OUT) | |
4086 | continue; | |
4087 | if (REG_P (op)) | |
4088 | { | |
4089 | bool this_cross = cross; | |
4090 | if (destrf == DEST_REGFILE_A && A_REGNO_P (REGNO (op))) | |
4091 | this_cross = false; | |
4092 | if (destrf == DEST_REGFILE_B && B_REGNO_P (REGNO (op))) | |
4093 | this_cross = false; | |
4094 | c6x_mark_reg_read (op, this_cross); | |
4095 | } | |
4096 | else if (MEM_P (op)) | |
4097 | { | |
4098 | op = XEXP (op, 0); | |
4099 | switch (GET_CODE (op)) | |
4100 | { | |
4101 | case POST_INC: | |
4102 | case PRE_INC: | |
4103 | case POST_DEC: | |
4104 | case PRE_DEC: | |
4105 | op = XEXP (op, 0); | |
4106 | /* fall through */ | |
4107 | case REG: | |
4108 | c6x_mark_reg_read (op, false); | |
4109 | break; | |
4110 | case POST_MODIFY: | |
4111 | case PRE_MODIFY: | |
4112 | op = XEXP (op, 1); | |
4113 | gcc_assert (GET_CODE (op) == PLUS); | |
4114 | /* fall through */ | |
4115 | case PLUS: | |
4116 | c6x_mark_reg_read (XEXP (op, 0), false); | |
4117 | if (REG_P (XEXP (op, 1))) | |
4118 | c6x_mark_reg_read (XEXP (op, 1), false); | |
4119 | break; | |
4120 | case SYMBOL_REF: | |
4121 | case LABEL_REF: | |
4122 | case CONST: | |
4123 | c6x_mark_regno_read (REG_B14, false); | |
4124 | break; | |
4125 | default: | |
4126 | gcc_unreachable (); | |
4127 | } | |
4128 | } | |
4129 | else if (!CONSTANT_P (op) && strlen (recog_data.constraints[i]) > 0) | |
4130 | gcc_unreachable (); | |
4131 | } | |
4132 | return reg_access_stall; | |
4133 | } | |
4134 | ||
4135 | /* Helper function for the TARGET_SCHED_REORDER and | |
4136 | TARGET_SCHED_REORDER2 hooks. If scheduling an insn would be unsafe | |
4137 | in the current cycle, move it down in the ready list and return the | |
4138 | number of non-unsafe insns. */ | |
4139 | ||
4140 | static int | |
b24ef467 | 4141 | c6x_sched_reorder_1 (rtx_insn **ready, int *pn_ready, int clock_var) |
5aa04b01 | 4142 | { |
4143 | int n_ready = *pn_ready; | |
b24ef467 | 4144 | rtx_insn **e_ready = ready + n_ready; |
4145 | rtx_insn **insnp; | |
5aa04b01 | 4146 | int first_jump; |
4147 | ||
4148 | /* Keep track of conflicts due to a limit number of register accesses, | |
4149 | and due to stalls incurred by too early accesses of registers using | |
4150 | cross paths. */ | |
4151 | ||
4152 | for (insnp = ready; insnp < e_ready; insnp++) | |
4153 | { | |
b24ef467 | 4154 | rtx_insn *insn = *insnp; |
5aa04b01 | 4155 | int icode = recog_memoized (insn); |
4156 | bool is_asm = (icode < 0 | |
4157 | && (GET_CODE (PATTERN (insn)) == ASM_INPUT | |
4158 | || asm_noperands (PATTERN (insn)) >= 0)); | |
758df283 | 4159 | bool no_parallel = (is_asm || icode == CODE_FOR_sploop |
5aa04b01 | 4160 | || (icode >= 0 |
4161 | && get_attr_type (insn) == TYPE_ATOMIC)); | |
4162 | ||
4163 | /* We delay asm insns until all delay slots are exhausted. We can't | |
4164 | accurately tell how many cycles an asm takes, and the main scheduling | |
4165 | code always assumes at least 1 cycle, which may be wrong. */ | |
4166 | if ((no_parallel | |
4167 | && (ss.issued_this_cycle > 0 || clock_var < ss.delays_finished_at)) | |
758df283 | 4168 | || c6x_registers_update (insn) |
4169 | || (ss.issued_this_cycle > 0 && icode == CODE_FOR_sploop)) | |
5aa04b01 | 4170 | { |
4171 | memmove (ready + 1, ready, (insnp - ready) * sizeof (rtx)); | |
4172 | *ready = insn; | |
4173 | n_ready--; | |
4174 | ready++; | |
4175 | } | |
4176 | else if (shadow_p (insn)) | |
4177 | { | |
4178 | memmove (ready + 1, ready, (insnp - ready) * sizeof (rtx)); | |
4179 | *ready = insn; | |
4180 | } | |
4181 | } | |
4182 | ||
4183 | /* Ensure that no other jump is scheduled in jump delay slots, since | |
4184 | it would put the machine into the wrong state. Also, we must | |
4185 | avoid scheduling insns that have a latency longer than the | |
4186 | remaining jump delay slots, as the code at the jump destination | |
4187 | won't be prepared for it. | |
4188 | ||
4189 | However, we can relax this condition somewhat. The rest of the | |
4190 | scheduler will automatically avoid scheduling an insn on which | |
4191 | the jump shadow depends so late that its side effect happens | |
4192 | after the jump. This means that if we see an insn with a longer | |
4193 | latency here, it can safely be scheduled if we can ensure that it | |
4194 | has a predicate opposite of the previous jump: the side effect | |
4195 | will happen in what we think of as the same basic block. In | |
4196 | c6x_variable_issue, we will record the necessary predicate in | |
4197 | new_conditions, and after scheduling is finished, we will modify | |
4198 | the insn. | |
4199 | ||
4200 | Special care must be taken whenever there is more than one jump | |
4201 | in flight. */ | |
4202 | ||
4203 | first_jump = first_jump_index (clock_var); | |
4204 | if (first_jump != -1) | |
4205 | { | |
4206 | int first_cycle = get_jump_cycle (first_jump); | |
4207 | rtx first_cond = get_jump_cond (first_jump); | |
4208 | int second_cycle = 0; | |
4209 | ||
4210 | if (first_jump > 0) | |
4211 | second_cycle = get_jump_cycle (first_jump - 1); | |
4212 | ||
4213 | for (insnp = ready; insnp < e_ready; insnp++) | |
4214 | { | |
b24ef467 | 4215 | rtx_insn *insn = *insnp; |
5aa04b01 | 4216 | int icode = recog_memoized (insn); |
4217 | bool is_asm = (icode < 0 | |
4218 | && (GET_CODE (PATTERN (insn)) == ASM_INPUT | |
4219 | || asm_noperands (PATTERN (insn)) >= 0)); | |
a905d913 | 4220 | int this_cycles, rsrv_cycles; |
5aa04b01 | 4221 | enum attr_type type; |
4222 | ||
4223 | gcc_assert (!is_asm); | |
4224 | if (icode < 0) | |
4225 | continue; | |
4226 | this_cycles = get_attr_cycles (insn); | |
a905d913 | 4227 | rsrv_cycles = get_attr_reserve_cycles (insn); |
5aa04b01 | 4228 | type = get_attr_type (insn); |
4229 | /* Treat branches specially; there is also a hazard if two jumps | |
4230 | end at the same cycle. */ | |
4231 | if (type == TYPE_BRANCH || type == TYPE_CALL) | |
4232 | this_cycles++; | |
4233 | if (clock_var + this_cycles <= first_cycle) | |
4234 | continue; | |
4235 | if ((first_jump > 0 && clock_var + this_cycles > second_cycle) | |
a905d913 | 4236 | || clock_var + rsrv_cycles > first_cycle |
5aa04b01 | 4237 | || !predicate_insn (insn, first_cond, false)) |
4238 | { | |
4239 | memmove (ready + 1, ready, (insnp - ready) * sizeof (rtx)); | |
4240 | *ready = insn; | |
4241 | n_ready--; | |
4242 | ready++; | |
4243 | } | |
4244 | } | |
4245 | } | |
4246 | ||
4247 | return n_ready; | |
4248 | } | |
4249 | ||
4250 | /* Implement the TARGET_SCHED_REORDER hook. We save the current clock | |
4251 | for later and clear the register access information for the new | |
4252 | cycle. We also move asm statements out of the way if they would be | |
4253 | scheduled in a delay slot. */ | |
4254 | ||
4255 | static int | |
4256 | c6x_sched_reorder (FILE *dump ATTRIBUTE_UNUSED, | |
4257 | int sched_verbose ATTRIBUTE_UNUSED, | |
b24ef467 | 4258 | rtx_insn **ready ATTRIBUTE_UNUSED, |
5aa04b01 | 4259 | int *pn_ready ATTRIBUTE_UNUSED, int clock_var) |
4260 | { | |
4261 | ss.curr_sched_clock = clock_var; | |
4262 | ss.issued_this_cycle = 0; | |
4263 | memset (ss.reg_n_accesses, 0, sizeof ss.reg_n_accesses); | |
4264 | memset (ss.reg_n_xaccesses, 0, sizeof ss.reg_n_xaccesses); | |
4265 | ||
4266 | if (ready == NULL) | |
4267 | return 0; | |
4268 | ||
4269 | return c6x_sched_reorder_1 (ready, pn_ready, clock_var); | |
4270 | } | |
4271 | ||
4272 | /* Implement the TARGET_SCHED_REORDER2 hook. We use this to record the clock | |
4273 | cycle for every insn. */ | |
4274 | ||
4275 | static int | |
4276 | c6x_sched_reorder2 (FILE *dump ATTRIBUTE_UNUSED, | |
4277 | int sched_verbose ATTRIBUTE_UNUSED, | |
b24ef467 | 4278 | rtx_insn **ready ATTRIBUTE_UNUSED, |
5aa04b01 | 4279 | int *pn_ready ATTRIBUTE_UNUSED, int clock_var) |
4280 | { | |
4281 | /* FIXME: the assembler rejects labels inside an execute packet. | |
4282 | This can occur if prologue insns are scheduled in parallel with | |
4283 | others, so we avoid this here. Also make sure that nothing is | |
4284 | scheduled in parallel with a TYPE_ATOMIC insn or after a jump. */ | |
4285 | if (RTX_FRAME_RELATED_P (ss.last_scheduled_insn) | |
4286 | || JUMP_P (ss.last_scheduled_insn) | |
4287 | || (recog_memoized (ss.last_scheduled_insn) >= 0 | |
4288 | && get_attr_type (ss.last_scheduled_insn) == TYPE_ATOMIC)) | |
4289 | { | |
4290 | int n_ready = *pn_ready; | |
b24ef467 | 4291 | rtx_insn **e_ready = ready + n_ready; |
4292 | rtx_insn **insnp; | |
5aa04b01 | 4293 | |
4294 | for (insnp = ready; insnp < e_ready; insnp++) | |
4295 | { | |
b24ef467 | 4296 | rtx_insn *insn = *insnp; |
5aa04b01 | 4297 | if (!shadow_p (insn)) |
4298 | { | |
4299 | memmove (ready + 1, ready, (insnp - ready) * sizeof (rtx)); | |
4300 | *ready = insn; | |
4301 | n_ready--; | |
4302 | ready++; | |
4303 | } | |
4304 | } | |
4305 | return n_ready; | |
4306 | } | |
4307 | ||
4308 | return c6x_sched_reorder_1 (ready, pn_ready, clock_var); | |
4309 | } | |
4310 | ||
4311 | /* Subroutine of maybe_clobber_cond, called through note_stores. */ | |
4312 | ||
4313 | static void | |
4314 | clobber_cond_1 (rtx x, const_rtx pat ATTRIBUTE_UNUSED, void *data1) | |
4315 | { | |
4316 | rtx *cond = (rtx *)data1; | |
4317 | if (*cond != NULL_RTX && reg_overlap_mentioned_p (x, *cond)) | |
4318 | *cond = NULL_RTX; | |
4319 | } | |
4320 | ||
4321 | /* Examine INSN, and if it destroys the conditions have recorded for | |
4322 | any of the jumps in flight, clear that condition so that we don't | |
4323 | predicate any more insns. CLOCK_VAR helps us limit the search to | |
4324 | only those jumps which are still in flight. */ | |
4325 | ||
4326 | static void | |
4327 | maybe_clobber_cond (rtx insn, int clock_var) | |
4328 | { | |
4329 | int n, idx; | |
4330 | idx = ss.jump_cycle_index; | |
4331 | for (n = 0; n < 12; n++, idx++) | |
4332 | { | |
4333 | rtx cond, link; | |
4334 | int cycle; | |
4335 | ||
4336 | if (idx >= 12) | |
4337 | idx -= 12; | |
4338 | cycle = ss.jump_cycles[idx]; | |
4339 | if (cycle <= clock_var) | |
4340 | return; | |
4341 | ||
4342 | cond = ss.jump_cond[idx]; | |
4343 | if (cond == NULL_RTX) | |
4344 | continue; | |
4345 | ||
4346 | if (CALL_P (insn)) | |
4347 | { | |
4348 | ss.jump_cond[idx] = NULL_RTX; | |
4349 | continue; | |
4350 | } | |
4351 | ||
4352 | note_stores (PATTERN (insn), clobber_cond_1, ss.jump_cond + idx); | |
4353 | for (link = REG_NOTES (insn); link; link = XEXP (link, 1)) | |
4354 | if (REG_NOTE_KIND (link) == REG_INC) | |
4355 | clobber_cond_1 (XEXP (link, 0), NULL_RTX, ss.jump_cond + idx); | |
4356 | } | |
4357 | } | |
4358 | ||
4359 | /* Implement the TARGET_SCHED_VARIABLE_ISSUE hook. We are about to | |
4360 | issue INSN. Return the number of insns left on the ready queue | |
4361 | that can be issued this cycle. | |
4362 | We use this hook to record clock cycles and reservations for every insn. */ | |
4363 | ||
4364 | static int | |
4365 | c6x_variable_issue (FILE *dump ATTRIBUTE_UNUSED, | |
4366 | int sched_verbose ATTRIBUTE_UNUSED, | |
18282db0 | 4367 | rtx_insn *insn, int can_issue_more ATTRIBUTE_UNUSED) |
5aa04b01 | 4368 | { |
4369 | ss.last_scheduled_insn = insn; | |
758df283 | 4370 | if (INSN_UID (insn) < sploop_max_uid_iter0 && !JUMP_P (insn)) |
18282db0 | 4371 | ss.last_scheduled_iter0 = insn; |
5aa04b01 | 4372 | if (GET_CODE (PATTERN (insn)) != USE && GET_CODE (PATTERN (insn)) != CLOBBER) |
4373 | ss.issued_this_cycle++; | |
f1f41a6c | 4374 | if (insn_info.exists ()) |
5aa04b01 | 4375 | { |
87ded687 | 4376 | state_t st_after = alloca (dfa_state_size); |
5aa04b01 | 4377 | int curr_clock = ss.curr_sched_clock; |
4378 | int uid = INSN_UID (insn); | |
4379 | int icode = recog_memoized (insn); | |
4380 | rtx first_cond; | |
4381 | int first, first_cycle; | |
87ded687 | 4382 | unsigned int mask; |
4383 | int i; | |
5aa04b01 | 4384 | |
4385 | insn_set_clock (insn, curr_clock); | |
4386 | INSN_INFO_ENTRY (uid).ebb_start | |
4387 | = curr_clock == 0 && ss.issued_this_cycle == 1; | |
4388 | ||
4389 | first = first_jump_index (ss.curr_sched_clock); | |
4390 | if (first == -1) | |
4391 | { | |
4392 | first_cycle = 0; | |
4393 | first_cond = NULL_RTX; | |
4394 | } | |
4395 | else | |
4396 | { | |
4397 | first_cycle = get_jump_cycle (first); | |
4398 | first_cond = get_jump_cond (first); | |
4399 | } | |
4400 | if (icode >= 0 | |
4401 | && first_cycle > curr_clock | |
4402 | && first_cond != NULL_RTX | |
4403 | && (curr_clock + get_attr_cycles (insn) > first_cycle | |
4404 | || get_attr_type (insn) == TYPE_BRANCH | |
4405 | || get_attr_type (insn) == TYPE_CALL)) | |
4406 | INSN_INFO_ENTRY (uid).new_cond = first_cond; | |
4407 | ||
87ded687 | 4408 | memcpy (st_after, curr_state, dfa_state_size); |
4409 | state_transition (st_after, const0_rtx); | |
4410 | ||
4411 | mask = 0; | |
4412 | for (i = 0; i < 2 * UNIT_QID_SIDE_OFFSET; i++) | |
4413 | if (cpu_unit_reservation_p (st_after, c6x_unit_codes[i]) | |
4414 | && !cpu_unit_reservation_p (prev_cycle_state, c6x_unit_codes[i])) | |
4415 | mask |= 1 << i; | |
4416 | INSN_INFO_ENTRY (uid).unit_mask = mask; | |
4417 | ||
5aa04b01 | 4418 | maybe_clobber_cond (insn, curr_clock); |
4419 | ||
4420 | if (icode >= 0) | |
4421 | { | |
4422 | int i, cycles; | |
4423 | ||
4424 | c6x_registers_update (insn); | |
4425 | memcpy (ss.reg_n_accesses, ss.tmp_reg_n_accesses, | |
4426 | sizeof ss.reg_n_accesses); | |
4427 | memcpy (ss.reg_n_xaccesses, ss.tmp_reg_n_accesses, | |
4428 | sizeof ss.reg_n_xaccesses); | |
4429 | ||
4430 | cycles = get_attr_cycles (insn); | |
4431 | if (ss.delays_finished_at < ss.curr_sched_clock + cycles) | |
4432 | ss.delays_finished_at = ss.curr_sched_clock + cycles; | |
4433 | if (get_attr_type (insn) == TYPE_BRANCH | |
4434 | || get_attr_type (insn) == TYPE_CALL) | |
4435 | { | |
4436 | rtx opposite = condjump_opposite_condition (insn); | |
4437 | record_jump (ss.curr_sched_clock + cycles, opposite); | |
4438 | } | |
4439 | ||
4440 | /* Mark the cycles in which the destination registers are written. | |
4441 | This is used for calculating stalls when using cross units. */ | |
4442 | extract_insn (insn); | |
4443 | /* Cross-path stalls don't apply to results of load insns. */ | |
4444 | if (get_attr_type (insn) == TYPE_LOAD | |
4445 | || get_attr_type (insn) == TYPE_LOADN | |
4446 | || get_attr_type (insn) == TYPE_LOAD_SHADOW) | |
4447 | cycles--; | |
4448 | for (i = 0; i < recog_data.n_operands; i++) | |
4449 | { | |
4450 | rtx op = recog_data.operand[i]; | |
4451 | if (MEM_P (op)) | |
4452 | { | |
4453 | rtx addr = XEXP (op, 0); | |
4454 | if (GET_RTX_CLASS (GET_CODE (addr)) == RTX_AUTOINC) | |
4455 | c6x_mark_reg_written (XEXP (addr, 0), | |
4456 | insn_uid_get_clock (uid) + 1); | |
4457 | } | |
4458 | if (recog_data.operand_type[i] != OP_IN | |
4459 | && REG_P (op)) | |
4460 | { | |
4461 | c6x_mark_reg_written (op, | |
4462 | insn_uid_get_clock (uid) + cycles); | |
4463 | } | |
4464 | } | |
4465 | } | |
4466 | } | |
4467 | return can_issue_more; | |
4468 | } | |
4469 | ||
4470 | /* Implement the TARGET_SCHED_ADJUST_COST hook. We need special handling for | |
4471 | anti- and output dependencies. */ | |
4472 | ||
4473 | static int | |
99f52c2b | 4474 | c6x_adjust_cost (rtx_insn *insn, int dep_type, rtx_insn *dep_insn, int cost, |
4475 | unsigned int) | |
5aa04b01 | 4476 | { |
4477 | enum attr_type insn_type = TYPE_UNKNOWN, dep_insn_type = TYPE_UNKNOWN; | |
4478 | int dep_insn_code_number, insn_code_number; | |
4479 | int shadow_bonus = 0; | |
4480 | enum reg_note kind; | |
4481 | dep_insn_code_number = recog_memoized (dep_insn); | |
4482 | insn_code_number = recog_memoized (insn); | |
4483 | ||
4484 | if (dep_insn_code_number >= 0) | |
4485 | dep_insn_type = get_attr_type (dep_insn); | |
4486 | ||
4487 | if (insn_code_number >= 0) | |
4488 | insn_type = get_attr_type (insn); | |
4489 | ||
99f52c2b | 4490 | kind = (reg_note) dep_type; |
5aa04b01 | 4491 | if (kind == 0) |
4492 | { | |
4493 | /* If we have a dependency on a load, and it's not for the result of | |
4494 | the load, it must be for an autoincrement. Reduce the cost in that | |
4495 | case. */ | |
4496 | if (dep_insn_type == TYPE_LOAD) | |
4497 | { | |
4498 | rtx set = PATTERN (dep_insn); | |
4499 | if (GET_CODE (set) == COND_EXEC) | |
4500 | set = COND_EXEC_CODE (set); | |
4501 | if (GET_CODE (set) == UNSPEC) | |
4502 | cost = 1; | |
4503 | else | |
4504 | { | |
4505 | gcc_assert (GET_CODE (set) == SET); | |
4506 | if (!reg_overlap_mentioned_p (SET_DEST (set), PATTERN (insn))) | |
4507 | cost = 1; | |
4508 | } | |
4509 | } | |
4510 | } | |
4511 | ||
4512 | /* A jump shadow needs to have its latency decreased by one. Conceptually, | |
4513 | it occurs in between two cycles, but we schedule it at the end of the | |
4514 | first cycle. */ | |
4515 | if (shadow_type_p (insn_type)) | |
4516 | shadow_bonus = 1; | |
4517 | ||
4518 | /* Anti and output dependencies usually have zero cost, but we want | |
4519 | to insert a stall after a jump, and after certain floating point | |
4520 | insns that take more than one cycle to read their inputs. In the | |
4521 | future, we should try to find a better algorithm for scheduling | |
4522 | jumps. */ | |
4523 | if (kind != 0) | |
4524 | { | |
4525 | /* We can get anti-dependencies against shadow insns. Treat these | |
4526 | like output dependencies, so that the insn is entirely finished | |
4527 | before the branch takes place. */ | |
4528 | if (kind == REG_DEP_ANTI && insn_type == TYPE_SHADOW) | |
4529 | kind = REG_DEP_OUTPUT; | |
4530 | switch (dep_insn_type) | |
4531 | { | |
4532 | case TYPE_CALLP: | |
4533 | return 1; | |
4534 | case TYPE_BRANCH: | |
4535 | case TYPE_CALL: | |
4536 | if (get_attr_has_shadow (dep_insn) == HAS_SHADOW_Y) | |
4537 | /* This is a real_jump/real_call insn. These don't have | |
4538 | outputs, and ensuring the validity of scheduling things | |
4539 | in the delay slot is the job of | |
4540 | c6x_sched_reorder_1. */ | |
4541 | return 0; | |
4542 | /* Unsplit calls can happen - e.g. for divide insns. */ | |
4543 | return 6; | |
4544 | case TYPE_LOAD: | |
4545 | case TYPE_LOADN: | |
4546 | case TYPE_INTDP: | |
4547 | if (kind == REG_DEP_OUTPUT) | |
4548 | return 5 - shadow_bonus; | |
4549 | return 0; | |
4550 | case TYPE_MPY4: | |
4551 | case TYPE_FP4: | |
4552 | if (kind == REG_DEP_OUTPUT) | |
4553 | return 4 - shadow_bonus; | |
4554 | return 0; | |
4555 | case TYPE_MPY2: | |
4556 | if (kind == REG_DEP_OUTPUT) | |
4557 | return 2 - shadow_bonus; | |
4558 | return 0; | |
4559 | case TYPE_CMPDP: | |
4560 | if (kind == REG_DEP_OUTPUT) | |
4561 | return 2 - shadow_bonus; | |
4562 | return 2; | |
4563 | case TYPE_ADDDP: | |
4564 | case TYPE_MPYSPDP: | |
4565 | if (kind == REG_DEP_OUTPUT) | |
4566 | return 7 - shadow_bonus; | |
4567 | return 2; | |
4568 | case TYPE_MPYSP2DP: | |
4569 | if (kind == REG_DEP_OUTPUT) | |
4570 | return 5 - shadow_bonus; | |
4571 | return 2; | |
4572 | case TYPE_MPYI: | |
4573 | if (kind == REG_DEP_OUTPUT) | |
4574 | return 9 - shadow_bonus; | |
4575 | return 4; | |
4576 | case TYPE_MPYID: | |
4577 | case TYPE_MPYDP: | |
4578 | if (kind == REG_DEP_OUTPUT) | |
4579 | return 10 - shadow_bonus; | |
4580 | return 4; | |
4581 | ||
4582 | default: | |
4583 | if (insn_type == TYPE_SPKERNEL) | |
4584 | return 0; | |
4585 | if (kind == REG_DEP_OUTPUT) | |
4586 | return 1 - shadow_bonus; | |
4587 | ||
4588 | return 0; | |
4589 | } | |
4590 | } | |
4591 | ||
4592 | return cost - shadow_bonus; | |
4593 | } | |
4594 | \f | |
4595 | /* Create a SEQUENCE rtx to replace the instructions in SLOT, of which there | |
4596 | are N_FILLED. REAL_FIRST identifies the slot if the insn that appears | |
4597 | first in the original stream. */ | |
4598 | ||
4599 | static void | |
f17e3fff | 4600 | gen_one_bundle (rtx_insn **slot, int n_filled, int real_first) |
5aa04b01 | 4601 | { |
f17e3fff | 4602 | rtx seq; |
4603 | rtx_insn *bundle; | |
4604 | rtx_insn *t; | |
5aa04b01 | 4605 | int i; |
4606 | ||
f17e3fff | 4607 | seq = gen_rtx_SEQUENCE (VOIDmode, gen_rtvec_v (n_filled, slot)); |
4608 | bundle = make_insn_raw (seq); | |
5aa04b01 | 4609 | BLOCK_FOR_INSN (bundle) = BLOCK_FOR_INSN (slot[0]); |
d53c050c | 4610 | INSN_LOCATION (bundle) = INSN_LOCATION (slot[0]); |
4a57a2e8 | 4611 | SET_PREV_INSN (bundle) = SET_PREV_INSN (slot[real_first]); |
5aa04b01 | 4612 | |
f17e3fff | 4613 | t = NULL; |
5aa04b01 | 4614 | |
4615 | for (i = 0; i < n_filled; i++) | |
4616 | { | |
f17e3fff | 4617 | rtx_insn *insn = slot[i]; |
5aa04b01 | 4618 | remove_insn (insn); |
4a57a2e8 | 4619 | SET_PREV_INSN (insn) = t ? t : PREV_INSN (bundle); |
5aa04b01 | 4620 | if (t != NULL_RTX) |
4a57a2e8 | 4621 | SET_NEXT_INSN (t) = insn; |
5aa04b01 | 4622 | t = insn; |
4623 | if (i > 0) | |
d53c050c | 4624 | INSN_LOCATION (slot[i]) = INSN_LOCATION (bundle); |
5aa04b01 | 4625 | } |
4626 | ||
4a57a2e8 | 4627 | SET_NEXT_INSN (bundle) = NEXT_INSN (PREV_INSN (bundle)); |
4628 | SET_NEXT_INSN (t) = NEXT_INSN (bundle); | |
4629 | SET_NEXT_INSN (PREV_INSN (bundle)) = bundle; | |
4630 | SET_PREV_INSN (NEXT_INSN (bundle)) = bundle; | |
5aa04b01 | 4631 | } |
4632 | ||
4633 | /* Move all parallel instructions into SEQUENCEs, so that no subsequent passes | |
4634 | try to insert labels in the middle. */ | |
4635 | ||
4636 | static void | |
4637 | c6x_gen_bundles (void) | |
4638 | { | |
4639 | basic_block bb; | |
5aa04b01 | 4640 | |
fc00614f | 4641 | FOR_EACH_BB_FN (bb, cfun) |
5aa04b01 | 4642 | { |
f17e3fff | 4643 | rtx_insn *insn, *next; |
5aa04b01 | 4644 | /* The machine is eight insns wide. We can have up to six shadow |
4645 | insns, plus an extra slot for merging the jump shadow. */ | |
f17e3fff | 4646 | rtx_insn *slot[15]; |
5aa04b01 | 4647 | int n_filled = 0; |
4648 | int first_slot = 0; | |
4649 | ||
4650 | for (insn = BB_HEAD (bb);; insn = next) | |
4651 | { | |
4652 | int at_end; | |
4653 | rtx delete_this = NULL_RTX; | |
4654 | ||
4655 | if (NONDEBUG_INSN_P (insn)) | |
4656 | { | |
4657 | /* Put calls at the start of the sequence. */ | |
4658 | if (CALL_P (insn)) | |
4659 | { | |
4660 | first_slot++; | |
4661 | if (n_filled) | |
4662 | { | |
4663 | memmove (&slot[1], &slot[0], | |
4664 | n_filled * sizeof (slot[0])); | |
4665 | } | |
4666 | if (!shadow_p (insn)) | |
4667 | { | |
4668 | PUT_MODE (insn, TImode); | |
4669 | if (n_filled) | |
4670 | PUT_MODE (slot[1], VOIDmode); | |
4671 | } | |
4672 | n_filled++; | |
4673 | slot[0] = insn; | |
4674 | } | |
4675 | else | |
4676 | { | |
4677 | slot[n_filled++] = insn; | |
4678 | } | |
4679 | } | |
4680 | ||
4681 | next = NEXT_INSN (insn); | |
4682 | while (next && insn != BB_END (bb) | |
4683 | && !(NONDEBUG_INSN_P (next) | |
4684 | && GET_CODE (PATTERN (next)) != USE | |
4685 | && GET_CODE (PATTERN (next)) != CLOBBER)) | |
4686 | { | |
4687 | insn = next; | |
4688 | next = NEXT_INSN (insn); | |
4689 | } | |
4690 | ||
4691 | at_end = insn == BB_END (bb); | |
4692 | if (delete_this == NULL_RTX | |
4693 | && (at_end || (GET_MODE (next) == TImode | |
4694 | && !(shadow_p (next) && CALL_P (next))))) | |
4695 | { | |
4696 | if (n_filled >= 2) | |
4697 | gen_one_bundle (slot, n_filled, first_slot); | |
4698 | ||
4699 | n_filled = 0; | |
4700 | first_slot = 0; | |
4701 | } | |
4702 | if (at_end) | |
4703 | break; | |
4704 | } | |
4705 | } | |
5aa04b01 | 4706 | } |
4707 | ||
4708 | /* Emit a NOP instruction for CYCLES cycles after insn AFTER. Return it. */ | |
4709 | ||
158a522b | 4710 | static rtx_insn * |
26cd1198 | 4711 | emit_nop_after (int cycles, rtx_insn *after) |
5aa04b01 | 4712 | { |
158a522b | 4713 | rtx_insn *insn; |
5aa04b01 | 4714 | |
4715 | /* mpydp has 9 delay slots, and we may schedule a stall for a cross-path | |
4716 | operation. We don't need the extra NOP since in this case, the hardware | |
4717 | will automatically insert the required stall. */ | |
4718 | if (cycles == 10) | |
4719 | cycles--; | |
4720 | ||
4721 | gcc_assert (cycles < 10); | |
4722 | ||
4723 | insn = emit_insn_after (gen_nop_count (GEN_INT (cycles)), after); | |
4724 | PUT_MODE (insn, TImode); | |
4725 | ||
4726 | return insn; | |
4727 | } | |
4728 | ||
4729 | /* Determine whether INSN is a call that needs to have a return label | |
4730 | placed. */ | |
4731 | ||
4732 | static bool | |
ed3e6e5d | 4733 | returning_call_p (rtx_insn *insn) |
5aa04b01 | 4734 | { |
4735 | if (CALL_P (insn)) | |
4736 | return (!SIBLING_CALL_P (insn) | |
4737 | && get_attr_type (insn) != TYPE_CALLP | |
4738 | && get_attr_type (insn) != TYPE_SHADOW); | |
4739 | if (recog_memoized (insn) < 0) | |
4740 | return false; | |
4741 | if (get_attr_type (insn) == TYPE_CALL) | |
4742 | return true; | |
4743 | return false; | |
4744 | } | |
4745 | ||
4746 | /* Determine whether INSN's pattern can be converted to use callp. */ | |
4747 | static bool | |
ed3e6e5d | 4748 | can_use_callp (rtx_insn *insn) |
5aa04b01 | 4749 | { |
4750 | int icode = recog_memoized (insn); | |
4751 | if (!TARGET_INSNS_64PLUS | |
4752 | || icode < 0 | |
4753 | || GET_CODE (PATTERN (insn)) == COND_EXEC) | |
4754 | return false; | |
4755 | ||
4756 | return ((icode == CODE_FOR_real_call | |
4757 | || icode == CODE_FOR_call_internal | |
4758 | || icode == CODE_FOR_call_value_internal) | |
4759 | && get_attr_dest_regfile (insn) == DEST_REGFILE_ANY); | |
4760 | } | |
4761 | ||
4762 | /* Convert the pattern of INSN, which must be a CALL_INSN, into a callp. */ | |
4763 | static void | |
ed3e6e5d | 4764 | convert_to_callp (rtx_insn *insn) |
5aa04b01 | 4765 | { |
4766 | rtx lab; | |
4767 | extract_insn (insn); | |
4768 | if (GET_CODE (PATTERN (insn)) == SET) | |
4769 | { | |
4770 | rtx dest = recog_data.operand[0]; | |
4771 | lab = recog_data.operand[1]; | |
4772 | PATTERN (insn) = gen_callp_value (dest, lab); | |
4773 | INSN_CODE (insn) = CODE_FOR_callp_value; | |
4774 | } | |
4775 | else | |
4776 | { | |
4777 | lab = recog_data.operand[0]; | |
4778 | PATTERN (insn) = gen_callp (lab); | |
4779 | INSN_CODE (insn) = CODE_FOR_callp; | |
4780 | } | |
4781 | } | |
4782 | ||
4783 | /* Scan forwards from INSN until we find the next insn that has mode TImode | |
4784 | (indicating it starts a new cycle), and occurs in cycle CLOCK. | |
4785 | Return it if we find such an insn, NULL_RTX otherwise. */ | |
56d95ea5 | 4786 | static rtx_insn * |
4787 | find_next_cycle_insn (rtx_insn *insn, int clock) | |
5aa04b01 | 4788 | { |
56d95ea5 | 4789 | rtx_insn *t = insn; |
5aa04b01 | 4790 | if (GET_MODE (t) == TImode) |
4791 | t = next_real_insn (t); | |
4792 | while (t && GET_MODE (t) != TImode) | |
4793 | t = next_real_insn (t); | |
4794 | ||
4795 | if (t && insn_get_clock (t) == clock) | |
4796 | return t; | |
56d95ea5 | 4797 | return NULL; |
5aa04b01 | 4798 | } |
4799 | ||
4800 | /* If COND_INSN has a COND_EXEC condition, wrap the same condition | |
4801 | around PAT. Return PAT either unchanged or modified in this | |
4802 | way. */ | |
4803 | static rtx | |
4804 | duplicate_cond (rtx pat, rtx cond_insn) | |
4805 | { | |
4806 | rtx cond_pat = PATTERN (cond_insn); | |
4807 | if (GET_CODE (cond_pat) == COND_EXEC) | |
4808 | pat = gen_rtx_COND_EXEC (VOIDmode, copy_rtx (COND_EXEC_TEST (cond_pat)), | |
4809 | pat); | |
4810 | return pat; | |
4811 | } | |
4812 | ||
4813 | /* Walk forward from INSN to find the last insn that issues in the same clock | |
4814 | cycle. */ | |
56d95ea5 | 4815 | static rtx_insn * |
4816 | find_last_same_clock (rtx_insn *insn) | |
5aa04b01 | 4817 | { |
56d95ea5 | 4818 | rtx_insn *retval = insn; |
ed3e6e5d | 4819 | rtx_insn *t = next_real_insn (insn); |
5aa04b01 | 4820 | |
4821 | while (t && GET_MODE (t) != TImode) | |
4822 | { | |
4823 | if (!DEBUG_INSN_P (t) && recog_memoized (t) >= 0) | |
4824 | retval = t; | |
4825 | t = next_real_insn (t); | |
4826 | } | |
4827 | return retval; | |
4828 | } | |
4829 | ||
4830 | /* For every call insn in the function, emit code to load the return | |
4831 | address. For each call we create a return label and store it in | |
4832 | CALL_LABELS. If are not scheduling, we emit the labels here, | |
4833 | otherwise the caller will do it later. | |
4834 | This function is called after final insn scheduling, but before creating | |
4835 | the SEQUENCEs that represent execute packets. */ | |
4836 | ||
4837 | static void | |
924b3c83 | 4838 | reorg_split_calls (rtx_code_label **call_labels) |
5aa04b01 | 4839 | { |
4840 | unsigned int reservation_mask = 0; | |
f17e3fff | 4841 | rtx_insn *insn = get_insns (); |
aa90bb35 | 4842 | gcc_assert (NOTE_P (insn)); |
5aa04b01 | 4843 | insn = next_real_insn (insn); |
4844 | while (insn) | |
4845 | { | |
4846 | int uid; | |
f17e3fff | 4847 | rtx_insn *next = next_real_insn (insn); |
5aa04b01 | 4848 | |
4849 | if (DEBUG_INSN_P (insn)) | |
4850 | goto done; | |
4851 | ||
4852 | if (GET_MODE (insn) == TImode) | |
4853 | reservation_mask = 0; | |
4854 | uid = INSN_UID (insn); | |
4855 | if (c6x_flag_schedule_insns2 && recog_memoized (insn) >= 0) | |
4856 | reservation_mask |= 1 << INSN_INFO_ENTRY (uid).reservation; | |
4857 | ||
4858 | if (returning_call_p (insn)) | |
4859 | { | |
db7dd023 | 4860 | rtx_code_label *label = gen_label_rtx (); |
5aa04b01 | 4861 | rtx labelref = gen_rtx_LABEL_REF (Pmode, label); |
4862 | rtx reg = gen_rtx_REG (SImode, RETURN_ADDR_REGNO); | |
4863 | ||
4864 | LABEL_NUSES (label) = 2; | |
4865 | if (!c6x_flag_schedule_insns2) | |
4866 | { | |
4867 | if (can_use_callp (insn)) | |
4868 | convert_to_callp (insn); | |
4869 | else | |
4870 | { | |
4871 | rtx t; | |
f17e3fff | 4872 | rtx_insn *slot[4]; |
5aa04b01 | 4873 | emit_label_after (label, insn); |
4874 | ||
4875 | /* Bundle the call and its delay slots into a single | |
4876 | SEQUENCE. While these do not issue in parallel | |
4877 | we need to group them into a single EH region. */ | |
4878 | slot[0] = insn; | |
4879 | PUT_MODE (insn, TImode); | |
4880 | if (TARGET_INSNS_64) | |
4881 | { | |
4882 | t = gen_addkpc (reg, labelref, GEN_INT (4)); | |
4883 | slot[1] = emit_insn_after (duplicate_cond (t, insn), | |
4884 | insn); | |
4885 | PUT_MODE (slot[1], TImode); | |
4886 | gen_one_bundle (slot, 2, 0); | |
4887 | } | |
4888 | else | |
4889 | { | |
4890 | slot[3] = emit_insn_after (gen_nop_count (GEN_INT (3)), | |
4891 | insn); | |
4892 | PUT_MODE (slot[3], TImode); | |
4893 | t = gen_movsi_lo_sum (reg, reg, labelref); | |
4894 | slot[2] = emit_insn_after (duplicate_cond (t, insn), | |
4895 | insn); | |
4896 | PUT_MODE (slot[2], TImode); | |
4897 | t = gen_movsi_high (reg, labelref); | |
4898 | slot[1] = emit_insn_after (duplicate_cond (t, insn), | |
4899 | insn); | |
4900 | PUT_MODE (slot[1], TImode); | |
4901 | gen_one_bundle (slot, 4, 0); | |
4902 | } | |
4903 | } | |
4904 | } | |
4905 | else | |
4906 | { | |
4907 | /* If we scheduled, we reserved the .S2 unit for one or two | |
4908 | cycles after the call. Emit the insns in these slots, | |
4909 | unless it's possible to create a CALLP insn. | |
4910 | Note that this works because the dependencies ensure that | |
4911 | no insn setting/using B3 is scheduled in the delay slots of | |
4912 | a call. */ | |
4913 | int this_clock = insn_get_clock (insn); | |
56d95ea5 | 4914 | rtx_insn *after1; |
5aa04b01 | 4915 | |
4916 | call_labels[INSN_UID (insn)] = label; | |
4917 | ||
56d95ea5 | 4918 | rtx_insn *last_same_clock = find_last_same_clock (insn); |
5aa04b01 | 4919 | |
4920 | if (can_use_callp (insn)) | |
4921 | { | |
4922 | /* Find the first insn of the next execute packet. If it | |
87ded687 | 4923 | is the shadow insn corresponding to this call, we may |
5aa04b01 | 4924 | use a CALLP insn. */ |
ed3e6e5d | 4925 | rtx_insn *shadow = |
4926 | next_nonnote_nondebug_insn (last_same_clock); | |
5aa04b01 | 4927 | |
87ded687 | 4928 | if (CALL_P (shadow) |
4929 | && insn_get_clock (shadow) == this_clock + 5) | |
5aa04b01 | 4930 | { |
87ded687 | 4931 | convert_to_callp (shadow); |
4932 | insn_set_clock (shadow, this_clock); | |
4933 | INSN_INFO_ENTRY (INSN_UID (shadow)).reservation | |
4934 | = RESERVATION_S2; | |
4935 | INSN_INFO_ENTRY (INSN_UID (shadow)).unit_mask | |
4936 | = INSN_INFO_ENTRY (INSN_UID (last_same_clock)).unit_mask; | |
5aa04b01 | 4937 | if (GET_MODE (insn) == TImode) |
4938 | { | |
91a55c11 | 4939 | rtx_insn *new_cycle_first = NEXT_INSN (insn); |
5aa04b01 | 4940 | while (!NONDEBUG_INSN_P (new_cycle_first) |
4941 | || GET_CODE (PATTERN (new_cycle_first)) == USE | |
4942 | || GET_CODE (PATTERN (new_cycle_first)) == CLOBBER) | |
4943 | new_cycle_first = NEXT_INSN (new_cycle_first); | |
4944 | PUT_MODE (new_cycle_first, TImode); | |
87ded687 | 4945 | if (new_cycle_first != shadow) |
4946 | PUT_MODE (shadow, VOIDmode); | |
5aa04b01 | 4947 | INSN_INFO_ENTRY (INSN_UID (new_cycle_first)).ebb_start |
4948 | = INSN_INFO_ENTRY (INSN_UID (insn)).ebb_start; | |
4949 | } | |
4950 | else | |
87ded687 | 4951 | PUT_MODE (shadow, VOIDmode); |
5aa04b01 | 4952 | delete_insn (insn); |
4953 | goto done; | |
4954 | } | |
4955 | } | |
4956 | after1 = find_next_cycle_insn (last_same_clock, this_clock + 1); | |
4957 | if (after1 == NULL_RTX) | |
4958 | after1 = last_same_clock; | |
4959 | else | |
4960 | after1 = find_last_same_clock (after1); | |
4961 | if (TARGET_INSNS_64) | |
4962 | { | |
4963 | rtx x1 = gen_addkpc (reg, labelref, const0_rtx); | |
4964 | x1 = emit_insn_after (duplicate_cond (x1, insn), after1); | |
4965 | insn_set_clock (x1, this_clock + 1); | |
4966 | INSN_INFO_ENTRY (INSN_UID (x1)).reservation = RESERVATION_S2; | |
4967 | if (after1 == last_same_clock) | |
4968 | PUT_MODE (x1, TImode); | |
87ded687 | 4969 | else |
4970 | INSN_INFO_ENTRY (INSN_UID (x1)).unit_mask | |
4971 | = INSN_INFO_ENTRY (INSN_UID (after1)).unit_mask; | |
5aa04b01 | 4972 | } |
4973 | else | |
4974 | { | |
4975 | rtx x1, x2; | |
26cd1198 | 4976 | rtx_insn *after2 = find_next_cycle_insn (after1, |
4977 | this_clock + 2); | |
5aa04b01 | 4978 | if (after2 == NULL_RTX) |
4979 | after2 = after1; | |
4980 | x2 = gen_movsi_lo_sum (reg, reg, labelref); | |
4981 | x2 = emit_insn_after (duplicate_cond (x2, insn), after2); | |
4982 | x1 = gen_movsi_high (reg, labelref); | |
4983 | x1 = emit_insn_after (duplicate_cond (x1, insn), after1); | |
4984 | insn_set_clock (x1, this_clock + 1); | |
4985 | insn_set_clock (x2, this_clock + 2); | |
4986 | INSN_INFO_ENTRY (INSN_UID (x1)).reservation = RESERVATION_S2; | |
4987 | INSN_INFO_ENTRY (INSN_UID (x2)).reservation = RESERVATION_S2; | |
4988 | if (after1 == last_same_clock) | |
4989 | PUT_MODE (x1, TImode); | |
87ded687 | 4990 | else |
4991 | INSN_INFO_ENTRY (INSN_UID (x1)).unit_mask | |
4992 | = INSN_INFO_ENTRY (INSN_UID (after1)).unit_mask; | |
5aa04b01 | 4993 | if (after1 == after2) |
4994 | PUT_MODE (x2, TImode); | |
87ded687 | 4995 | else |
4996 | INSN_INFO_ENTRY (INSN_UID (x2)).unit_mask | |
4997 | = INSN_INFO_ENTRY (INSN_UID (after2)).unit_mask; | |
5aa04b01 | 4998 | } |
4999 | } | |
5000 | } | |
5001 | done: | |
5002 | insn = next; | |
5003 | } | |
5004 | } | |
5005 | ||
5006 | /* Called as part of c6x_reorg. This function emits multi-cycle NOP | |
5007 | insns as required for correctness. CALL_LABELS is the array that | |
5008 | holds the return labels for call insns; we emit these here if | |
5009 | scheduling was run earlier. */ | |
5010 | ||
5011 | static void | |
924b3c83 | 5012 | reorg_emit_nops (rtx_code_label **call_labels) |
5aa04b01 | 5013 | { |
5014 | bool first; | |
158a522b | 5015 | rtx last_call; |
5016 | rtx_insn *prev; | |
5aa04b01 | 5017 | int prev_clock, earliest_bb_end; |
5018 | int prev_implicit_nops; | |
158a522b | 5019 | rtx_insn *insn = get_insns (); |
5aa04b01 | 5020 | |
5021 | /* We look at one insn (or bundle inside a sequence) in each iteration, storing | |
5022 | its issue time in PREV_CLOCK for the next iteration. If there is a gap in | |
5023 | clocks, we must insert a NOP. | |
5024 | EARLIEST_BB_END tracks in which cycle all insns that have been issued in the | |
5025 | current basic block will finish. We must not allow the next basic block to | |
5026 | begin before this cycle. | |
5027 | PREV_IMPLICIT_NOPS tells us whether we've seen an insn that implicitly contains | |
5028 | a multi-cycle nop. The code is scheduled such that subsequent insns will | |
5029 | show the cycle gap, but we needn't insert a real NOP instruction. */ | |
5030 | insn = next_real_insn (insn); | |
158a522b | 5031 | last_call = prev = NULL; |
5aa04b01 | 5032 | prev_clock = -1; |
5033 | earliest_bb_end = 0; | |
5034 | prev_implicit_nops = 0; | |
5035 | first = true; | |
5036 | while (insn) | |
5037 | { | |
5038 | int this_clock = -1; | |
158a522b | 5039 | rtx_insn *next; |
5aa04b01 | 5040 | int max_cycles = 0; |
5041 | ||
5042 | next = next_real_insn (insn); | |
5043 | ||
5044 | if (DEBUG_INSN_P (insn) | |
5045 | || GET_CODE (PATTERN (insn)) == USE | |
5046 | || GET_CODE (PATTERN (insn)) == CLOBBER | |
5047 | || shadow_or_blockage_p (insn) | |
77985f1a | 5048 | || JUMP_TABLE_DATA_P (insn)) |
5aa04b01 | 5049 | goto next_insn; |
5050 | ||
5051 | if (!c6x_flag_schedule_insns2) | |
5052 | /* No scheduling; ensure that no parallel issue happens. */ | |
5053 | PUT_MODE (insn, TImode); | |
5054 | else | |
5055 | { | |
5056 | int cycles; | |
5057 | ||
5058 | this_clock = insn_get_clock (insn); | |
5059 | if (this_clock != prev_clock) | |
5060 | { | |
5061 | PUT_MODE (insn, TImode); | |
5062 | ||
5063 | if (!first) | |
5064 | { | |
5065 | cycles = this_clock - prev_clock; | |
5066 | ||
5067 | cycles -= prev_implicit_nops; | |
5068 | if (cycles > 1) | |
5069 | { | |
5070 | rtx nop = emit_nop_after (cycles - 1, prev); | |
5071 | insn_set_clock (nop, prev_clock + prev_implicit_nops + 1); | |
5072 | } | |
5073 | } | |
5074 | prev_clock = this_clock; | |
5075 | ||
5076 | if (last_call | |
5077 | && insn_get_clock (last_call) + 6 <= this_clock) | |
5078 | { | |
5079 | emit_label_before (call_labels[INSN_UID (last_call)], insn); | |
5080 | last_call = NULL_RTX; | |
5081 | } | |
5082 | prev_implicit_nops = 0; | |
5083 | } | |
5084 | } | |
5085 | ||
5086 | /* Examine how many cycles the current insn takes, and adjust | |
5087 | LAST_CALL, EARLIEST_BB_END and PREV_IMPLICIT_NOPS. */ | |
5088 | if (recog_memoized (insn) >= 0 | |
5089 | /* If not scheduling, we've emitted NOPs after calls already. */ | |
5090 | && (c6x_flag_schedule_insns2 || !returning_call_p (insn))) | |
5091 | { | |
5092 | max_cycles = get_attr_cycles (insn); | |
5093 | if (get_attr_type (insn) == TYPE_CALLP) | |
5094 | prev_implicit_nops = 5; | |
5095 | } | |
5096 | else | |
5097 | max_cycles = 1; | |
5098 | if (returning_call_p (insn)) | |
5099 | last_call = insn; | |
5100 | ||
5101 | if (c6x_flag_schedule_insns2) | |
5102 | { | |
5103 | gcc_assert (this_clock >= 0); | |
5104 | if (earliest_bb_end < this_clock + max_cycles) | |
5105 | earliest_bb_end = this_clock + max_cycles; | |
5106 | } | |
5107 | else if (max_cycles > 1) | |
5108 | emit_nop_after (max_cycles - 1, insn); | |
5109 | ||
5110 | prev = insn; | |
5111 | first = false; | |
5112 | ||
5113 | next_insn: | |
5114 | if (c6x_flag_schedule_insns2 | |
5115 | && (next == NULL_RTX | |
5116 | || (GET_MODE (next) == TImode | |
5117 | && INSN_INFO_ENTRY (INSN_UID (next)).ebb_start)) | |
5118 | && earliest_bb_end > 0) | |
5119 | { | |
5120 | int cycles = earliest_bb_end - prev_clock; | |
5121 | if (cycles > 1) | |
5122 | { | |
5123 | prev = emit_nop_after (cycles - 1, prev); | |
5124 | insn_set_clock (prev, prev_clock + prev_implicit_nops + 1); | |
5125 | } | |
5126 | earliest_bb_end = 0; | |
5127 | prev_clock = -1; | |
5128 | first = true; | |
5129 | ||
5130 | if (last_call) | |
5131 | emit_label_after (call_labels[INSN_UID (last_call)], prev); | |
5132 | last_call = NULL_RTX; | |
5133 | } | |
5134 | insn = next; | |
5135 | } | |
5136 | } | |
5137 | ||
5138 | /* If possible, split INSN, which we know is either a jump or a call, into a real | |
5139 | insn and its shadow. */ | |
5140 | static void | |
b24ef467 | 5141 | split_delayed_branch (rtx_insn *insn) |
5aa04b01 | 5142 | { |
5143 | int code = recog_memoized (insn); | |
b24ef467 | 5144 | rtx_insn *i1; |
5145 | rtx newpat; | |
5aa04b01 | 5146 | rtx pat = PATTERN (insn); |
5147 | ||
5148 | if (GET_CODE (pat) == COND_EXEC) | |
5149 | pat = COND_EXEC_CODE (pat); | |
5150 | ||
5151 | if (CALL_P (insn)) | |
5152 | { | |
5153 | rtx src = pat, dest = NULL_RTX; | |
5154 | rtx callee; | |
5155 | if (GET_CODE (pat) == SET) | |
5156 | { | |
5157 | dest = SET_DEST (pat); | |
5158 | src = SET_SRC (pat); | |
5159 | } | |
5160 | callee = XEXP (XEXP (src, 0), 0); | |
5161 | if (SIBLING_CALL_P (insn)) | |
5162 | { | |
5163 | if (REG_P (callee)) | |
5164 | newpat = gen_indirect_sibcall_shadow (); | |
5165 | else | |
5166 | newpat = gen_sibcall_shadow (callee); | |
5167 | pat = gen_real_jump (callee); | |
5168 | } | |
5169 | else if (dest != NULL_RTX) | |
5170 | { | |
5171 | if (REG_P (callee)) | |
5172 | newpat = gen_indirect_call_value_shadow (dest); | |
5173 | else | |
5174 | newpat = gen_call_value_shadow (dest, callee); | |
5175 | pat = gen_real_call (callee); | |
5176 | } | |
5177 | else | |
5178 | { | |
5179 | if (REG_P (callee)) | |
5180 | newpat = gen_indirect_call_shadow (); | |
5181 | else | |
5182 | newpat = gen_call_shadow (callee); | |
5183 | pat = gen_real_call (callee); | |
5184 | } | |
5185 | pat = duplicate_cond (pat, insn); | |
5186 | newpat = duplicate_cond (newpat, insn); | |
5187 | } | |
5188 | else | |
5189 | { | |
5190 | rtx src, op; | |
5191 | if (GET_CODE (pat) == PARALLEL | |
5192 | && GET_CODE (XVECEXP (pat, 0, 0)) == RETURN) | |
5193 | { | |
5194 | newpat = gen_return_shadow (); | |
5195 | pat = gen_real_ret (XEXP (XVECEXP (pat, 0, 1), 0)); | |
5196 | newpat = duplicate_cond (newpat, insn); | |
5197 | } | |
5198 | else | |
5199 | switch (code) | |
5200 | { | |
5201 | case CODE_FOR_br_true: | |
5202 | case CODE_FOR_br_false: | |
5203 | src = SET_SRC (pat); | |
5204 | op = XEXP (src, code == CODE_FOR_br_true ? 1 : 2); | |
5205 | newpat = gen_condjump_shadow (op); | |
5206 | pat = gen_real_jump (op); | |
5207 | if (code == CODE_FOR_br_true) | |
5208 | pat = gen_rtx_COND_EXEC (VOIDmode, XEXP (src, 0), pat); | |
5209 | else | |
5210 | pat = gen_rtx_COND_EXEC (VOIDmode, | |
5211 | reversed_comparison (XEXP (src, 0), | |
5212 | VOIDmode), | |
5213 | pat); | |
5214 | break; | |
5215 | ||
5216 | case CODE_FOR_jump: | |
5217 | op = SET_SRC (pat); | |
5218 | newpat = gen_jump_shadow (op); | |
5219 | break; | |
5220 | ||
5221 | case CODE_FOR_indirect_jump: | |
5222 | newpat = gen_indirect_jump_shadow (); | |
5223 | break; | |
5224 | ||
5225 | case CODE_FOR_return_internal: | |
5226 | newpat = gen_return_shadow (); | |
5227 | pat = gen_real_ret (XEXP (XVECEXP (pat, 0, 1), 0)); | |
5228 | break; | |
5229 | ||
5230 | default: | |
5231 | return; | |
5232 | } | |
5233 | } | |
5234 | i1 = emit_insn_before (pat, insn); | |
5235 | PATTERN (insn) = newpat; | |
5236 | INSN_CODE (insn) = -1; | |
c0457559 | 5237 | record_delay_slot_pair (i1, insn, 5, 0); |
5aa04b01 | 5238 | } |
5239 | ||
758df283 | 5240 | /* If INSN is a multi-cycle insn that should be handled properly in |
5241 | modulo-scheduling, split it into a real insn and a shadow. | |
5242 | Return true if we made a change. | |
5243 | ||
5244 | It is valid for us to fail to split an insn; the caller has to deal | |
5245 | with the possibility. Currently we handle loads and most mpy2 and | |
5246 | mpy4 insns. */ | |
5247 | static bool | |
b24ef467 | 5248 | split_delayed_nonbranch (rtx_insn *insn) |
758df283 | 5249 | { |
5250 | int code = recog_memoized (insn); | |
5251 | enum attr_type type; | |
b24ef467 | 5252 | rtx_insn *i1; |
5253 | rtx newpat, src, dest; | |
758df283 | 5254 | rtx pat = PATTERN (insn); |
5255 | rtvec rtv; | |
5256 | int delay; | |
5257 | ||
5258 | if (GET_CODE (pat) == COND_EXEC) | |
5259 | pat = COND_EXEC_CODE (pat); | |
5260 | ||
5261 | if (code < 0 || GET_CODE (pat) != SET) | |
5262 | return false; | |
5263 | src = SET_SRC (pat); | |
5264 | dest = SET_DEST (pat); | |
5265 | if (!REG_P (dest)) | |
5266 | return false; | |
5267 | ||
5268 | type = get_attr_type (insn); | |
5269 | if (code >= 0 | |
5270 | && (type == TYPE_LOAD | |
5271 | || type == TYPE_LOADN)) | |
5272 | { | |
5273 | if (!MEM_P (src) | |
5274 | && (GET_CODE (src) != ZERO_EXTEND | |
5275 | || !MEM_P (XEXP (src, 0)))) | |
5276 | return false; | |
5277 | ||
5278 | if (GET_MODE_SIZE (GET_MODE (dest)) > 4 | |
5279 | && (GET_MODE_SIZE (GET_MODE (dest)) != 8 || !TARGET_LDDW)) | |
5280 | return false; | |
5281 | ||
5282 | rtv = gen_rtvec (2, GEN_INT (REGNO (SET_DEST (pat))), | |
5283 | SET_SRC (pat)); | |
5284 | newpat = gen_load_shadow (SET_DEST (pat)); | |
5285 | pat = gen_rtx_UNSPEC (VOIDmode, rtv, UNSPEC_REAL_LOAD); | |
5286 | delay = 4; | |
5287 | } | |
5288 | else if (code >= 0 | |
5289 | && (type == TYPE_MPY2 | |
5290 | || type == TYPE_MPY4)) | |
5291 | { | |
5292 | /* We don't handle floating point multiplies yet. */ | |
5293 | if (GET_MODE (dest) == SFmode) | |
5294 | return false; | |
5295 | ||
5296 | rtv = gen_rtvec (2, GEN_INT (REGNO (SET_DEST (pat))), | |
5297 | SET_SRC (pat)); | |
5298 | newpat = gen_mult_shadow (SET_DEST (pat)); | |
5299 | pat = gen_rtx_UNSPEC (VOIDmode, rtv, UNSPEC_REAL_MULT); | |
5300 | delay = type == TYPE_MPY2 ? 1 : 3; | |
5301 | } | |
5302 | else | |
5303 | return false; | |
5304 | ||
5305 | pat = duplicate_cond (pat, insn); | |
5306 | newpat = duplicate_cond (newpat, insn); | |
5307 | i1 = emit_insn_before (pat, insn); | |
5308 | PATTERN (insn) = newpat; | |
5309 | INSN_CODE (insn) = -1; | |
5310 | recog_memoized (insn); | |
5311 | recog_memoized (i1); | |
5312 | record_delay_slot_pair (i1, insn, delay, 0); | |
5313 | return true; | |
5314 | } | |
5315 | ||
5316 | /* Examine if INSN is the result of splitting a load into a real load and a | |
5317 | shadow, and if so, undo the transformation. */ | |
5318 | static void | |
91a55c11 | 5319 | undo_split_delayed_nonbranch (rtx_insn *insn) |
758df283 | 5320 | { |
5321 | int icode = recog_memoized (insn); | |
5322 | enum attr_type type; | |
91a55c11 | 5323 | rtx prev_pat, insn_pat; |
5324 | rtx_insn *prev; | |
758df283 | 5325 | |
5326 | if (icode < 0) | |
5327 | return; | |
5328 | type = get_attr_type (insn); | |
5329 | if (type != TYPE_LOAD_SHADOW && type != TYPE_MULT_SHADOW) | |
5330 | return; | |
5331 | prev = PREV_INSN (insn); | |
5332 | prev_pat = PATTERN (prev); | |
5333 | insn_pat = PATTERN (insn); | |
5334 | if (GET_CODE (prev_pat) == COND_EXEC) | |
5335 | { | |
5336 | prev_pat = COND_EXEC_CODE (prev_pat); | |
5337 | insn_pat = COND_EXEC_CODE (insn_pat); | |
5338 | } | |
5339 | ||
5340 | gcc_assert (GET_CODE (prev_pat) == UNSPEC | |
5341 | && ((XINT (prev_pat, 1) == UNSPEC_REAL_LOAD | |
5342 | && type == TYPE_LOAD_SHADOW) | |
5343 | || (XINT (prev_pat, 1) == UNSPEC_REAL_MULT | |
5344 | && type == TYPE_MULT_SHADOW))); | |
d1f9b275 | 5345 | insn_pat = gen_rtx_SET (SET_DEST (insn_pat), |
758df283 | 5346 | XVECEXP (prev_pat, 0, 1)); |
5347 | insn_pat = duplicate_cond (insn_pat, prev); | |
5348 | PATTERN (insn) = insn_pat; | |
5349 | INSN_CODE (insn) = -1; | |
5350 | delete_insn (prev); | |
5351 | } | |
5352 | ||
5aa04b01 | 5353 | /* Split every insn (i.e. jumps and calls) which can have delay slots into |
5354 | two parts: the first one is scheduled normally and emits the instruction, | |
5355 | while the second one is a shadow insn which shows the side effect taking | |
5356 | place. The second one is placed in the right cycle by the scheduler, but | |
5357 | not emitted as an assembly instruction. */ | |
5358 | ||
5359 | static void | |
5360 | split_delayed_insns (void) | |
5361 | { | |
b24ef467 | 5362 | rtx_insn *insn; |
5aa04b01 | 5363 | for (insn = get_insns (); insn; insn = NEXT_INSN (insn)) |
5364 | { | |
5365 | if (JUMP_P (insn) || CALL_P (insn)) | |
5366 | split_delayed_branch (insn); | |
5367 | } | |
5368 | } | |
5369 | ||
5370 | /* For every insn that has an entry in the new_conditions vector, give it | |
5371 | the appropriate predicate. */ | |
5372 | static void | |
5373 | conditionalize_after_sched (void) | |
5374 | { | |
5375 | basic_block bb; | |
91a55c11 | 5376 | rtx_insn *insn; |
fc00614f | 5377 | FOR_EACH_BB_FN (bb, cfun) |
5aa04b01 | 5378 | FOR_BB_INSNS (bb, insn) |
5379 | { | |
5380 | unsigned uid = INSN_UID (insn); | |
5381 | rtx cond; | |
5382 | if (!NONDEBUG_INSN_P (insn) || uid >= INSN_INFO_LENGTH) | |
5383 | continue; | |
5384 | cond = INSN_INFO_ENTRY (uid).new_cond; | |
5385 | if (cond == NULL_RTX) | |
5386 | continue; | |
5387 | if (dump_file) | |
5388 | fprintf (dump_file, "Conditionalizing insn %d\n", uid); | |
5389 | predicate_insn (insn, cond, true); | |
5390 | } | |
5391 | } | |
5392 | ||
758df283 | 5393 | /* A callback for the hw-doloop pass. This function examines INSN; if |
5394 | it is a loop_end pattern we recognize, return the reg rtx for the | |
5395 | loop counter. Otherwise, return NULL_RTX. */ | |
5396 | ||
5397 | static rtx | |
ed3e6e5d | 5398 | hwloop_pattern_reg (rtx_insn *insn) |
758df283 | 5399 | { |
5400 | rtx pat, reg; | |
5401 | ||
5402 | if (!JUMP_P (insn) || recog_memoized (insn) != CODE_FOR_loop_end) | |
5403 | return NULL_RTX; | |
5404 | ||
5405 | pat = PATTERN (insn); | |
5406 | reg = SET_DEST (XVECEXP (pat, 0, 1)); | |
5407 | if (!REG_P (reg)) | |
5408 | return NULL_RTX; | |
5409 | return reg; | |
5410 | } | |
5411 | ||
5412 | /* Return the number of cycles taken by BB, as computed by scheduling, | |
5413 | including the latencies of all insns with delay slots. IGNORE is | |
5414 | an insn we should ignore in the calculation, usually the final | |
5415 | branch. */ | |
5416 | static int | |
5417 | bb_earliest_end_cycle (basic_block bb, rtx ignore) | |
5418 | { | |
5419 | int earliest = 0; | |
91a55c11 | 5420 | rtx_insn *insn; |
758df283 | 5421 | |
5422 | FOR_BB_INSNS (bb, insn) | |
5423 | { | |
5424 | int cycles, this_clock; | |
5425 | ||
5426 | if (LABEL_P (insn) || NOTE_P (insn) || DEBUG_INSN_P (insn) | |
5427 | || GET_CODE (PATTERN (insn)) == USE | |
5428 | || GET_CODE (PATTERN (insn)) == CLOBBER | |
5429 | || insn == ignore) | |
5430 | continue; | |
5431 | ||
5432 | this_clock = insn_get_clock (insn); | |
5433 | cycles = get_attr_cycles (insn); | |
5434 | ||
5435 | if (earliest < this_clock + cycles) | |
5436 | earliest = this_clock + cycles; | |
5437 | } | |
5438 | return earliest; | |
5439 | } | |
5440 | ||
5441 | /* Examine the insns in BB and remove all which have a uid greater or | |
5442 | equal to MAX_UID. */ | |
5443 | static void | |
5444 | filter_insns_above (basic_block bb, int max_uid) | |
5445 | { | |
91a55c11 | 5446 | rtx_insn *insn, *next; |
758df283 | 5447 | bool prev_ti = false; |
5448 | int prev_cycle = -1; | |
5449 | ||
5450 | FOR_BB_INSNS_SAFE (bb, insn, next) | |
5451 | { | |
5452 | int this_cycle; | |
5453 | if (!NONDEBUG_INSN_P (insn)) | |
5454 | continue; | |
5455 | if (insn == BB_END (bb)) | |
5456 | return; | |
5457 | this_cycle = insn_get_clock (insn); | |
5458 | if (prev_ti && this_cycle == prev_cycle) | |
5459 | { | |
5460 | gcc_assert (GET_MODE (insn) != TImode); | |
5461 | PUT_MODE (insn, TImode); | |
5462 | } | |
5463 | prev_ti = false; | |
5464 | if (INSN_UID (insn) >= max_uid) | |
5465 | { | |
5466 | if (GET_MODE (insn) == TImode) | |
5467 | { | |
5468 | prev_ti = true; | |
5469 | prev_cycle = this_cycle; | |
5470 | } | |
5471 | delete_insn (insn); | |
5472 | } | |
5473 | } | |
5474 | } | |
5475 | ||
9936b574 | 5476 | /* Implement TARGET_ASM_EMIT_EXCEPT_PERSONALITY. */ |
5477 | ||
5478 | static void | |
5479 | c6x_asm_emit_except_personality (rtx personality) | |
5480 | { | |
5481 | fputs ("\t.personality\t", asm_out_file); | |
5482 | output_addr_const (asm_out_file, personality); | |
5483 | fputc ('\n', asm_out_file); | |
5484 | } | |
5485 | ||
5486 | /* Use a special assembly directive rather than a regular setion for | |
5487 | unwind table data. */ | |
5488 | ||
5489 | static void | |
5490 | c6x_asm_init_sections (void) | |
5491 | { | |
5492 | exception_section = get_unnamed_section (0, output_section_asm_op, | |
5493 | "\t.handlerdata"); | |
5494 | } | |
5495 | ||
758df283 | 5496 | /* A callback for the hw-doloop pass. Called to optimize LOOP in a |
5497 | machine-specific fashion; returns true if successful and false if | |
5498 | the hwloop_fail function should be called. */ | |
5499 | ||
5500 | static bool | |
5501 | hwloop_optimize (hwloop_info loop) | |
5502 | { | |
5503 | basic_block entry_bb, bb; | |
b24ef467 | 5504 | rtx_insn *seq, *insn, *prev, *entry_after, *end_packet; |
5505 | rtx_insn *head_insn, *tail_insn, *new_insns, *last_insn; | |
6d004ec3 | 5506 | int loop_earliest; |
758df283 | 5507 | int n_execute_packets; |
5508 | edge entry_edge; | |
5509 | unsigned ix; | |
5510 | int max_uid_before, delayed_splits; | |
5511 | int i, sp_ii, min_ii, max_ii, max_parallel, n_insns, n_real_insns, stages; | |
b24ef467 | 5512 | rtx_insn **orig_vec; |
5513 | rtx_insn **copies; | |
5514 | rtx_insn ***insn_copies; | |
758df283 | 5515 | |
5516 | if (!c6x_flag_modulo_sched || !c6x_flag_schedule_insns2 | |
5517 | || !TARGET_INSNS_64PLUS) | |
5518 | return false; | |
5519 | ||
5520 | if (loop->iter_reg_used || loop->depth > 1) | |
5521 | return false; | |
5522 | if (loop->has_call || loop->has_asm) | |
5523 | return false; | |
5524 | ||
5525 | if (loop->head != loop->tail) | |
5526 | return false; | |
5527 | ||
5528 | gcc_assert (loop->incoming_dest == loop->head); | |
5529 | ||
5530 | entry_edge = NULL; | |
f1f41a6c | 5531 | FOR_EACH_VEC_SAFE_ELT (loop->incoming, i, entry_edge) |
758df283 | 5532 | if (entry_edge->flags & EDGE_FALLTHRU) |
5533 | break; | |
5534 | if (entry_edge == NULL) | |
5535 | return false; | |
5536 | ||
9a4c7d5b | 5537 | reshuffle_units (loop->head); |
5538 | ||
d452a169 | 5539 | in_hwloop = true; |
758df283 | 5540 | schedule_ebbs_init (); |
5541 | schedule_ebb (BB_HEAD (loop->tail), loop->loop_end, true); | |
5542 | schedule_ebbs_finish (); | |
d452a169 | 5543 | in_hwloop = false; |
758df283 | 5544 | |
5545 | bb = loop->head; | |
5546 | loop_earliest = bb_earliest_end_cycle (bb, loop->loop_end) + 1; | |
5547 | ||
5548 | max_uid_before = get_max_uid (); | |
5549 | ||
5550 | /* Split all multi-cycle operations, such as loads. For normal | |
5551 | scheduling, we only do this for branches, as the generated code | |
5552 | would otherwise not be interrupt-safe. When using sploop, it is | |
5553 | safe and beneficial to split them. If any multi-cycle operations | |
5554 | remain after splitting (because we don't handle them yet), we | |
5555 | cannot pipeline the loop. */ | |
5556 | delayed_splits = 0; | |
5557 | FOR_BB_INSNS (bb, insn) | |
5558 | { | |
5559 | if (NONDEBUG_INSN_P (insn)) | |
5560 | { | |
5561 | recog_memoized (insn); | |
5562 | if (split_delayed_nonbranch (insn)) | |
5563 | delayed_splits++; | |
5564 | else if (INSN_CODE (insn) >= 0 | |
5565 | && get_attr_cycles (insn) > 1) | |
5566 | goto undo_splits; | |
5567 | } | |
5568 | } | |
5569 | ||
5570 | /* Count the number of insns as well as the number real insns, and save | |
5571 | the original sequence of insns in case we must restore it later. */ | |
5572 | n_insns = n_real_insns = 0; | |
5573 | FOR_BB_INSNS (bb, insn) | |
5574 | { | |
5575 | n_insns++; | |
5576 | if (NONDEBUG_INSN_P (insn) && insn != loop->loop_end) | |
5577 | n_real_insns++; | |
5578 | } | |
b24ef467 | 5579 | orig_vec = XNEWVEC (rtx_insn *, n_insns); |
758df283 | 5580 | n_insns = 0; |
5581 | FOR_BB_INSNS (bb, insn) | |
5582 | orig_vec[n_insns++] = insn; | |
5583 | ||
5584 | /* Count the unit reservations, and compute a minimum II from that | |
5585 | table. */ | |
5586 | count_unit_reqs (unit_reqs, loop->start_label, | |
5587 | PREV_INSN (loop->loop_end)); | |
5588 | merge_unit_reqs (unit_reqs); | |
5589 | ||
5590 | min_ii = res_mii (unit_reqs); | |
5591 | max_ii = loop_earliest < 15 ? loop_earliest : 14; | |
5592 | ||
5593 | /* Make copies of the loop body, up to a maximum number of stages we want | |
5594 | to handle. */ | |
5595 | max_parallel = loop_earliest / min_ii + 1; | |
5596 | ||
b24ef467 | 5597 | copies = XCNEWVEC (rtx_insn *, (max_parallel + 1) * n_real_insns); |
5598 | insn_copies = XNEWVEC (rtx_insn **, max_parallel + 1); | |
758df283 | 5599 | for (i = 0; i < max_parallel + 1; i++) |
5600 | insn_copies[i] = copies + i * n_real_insns; | |
5601 | ||
5602 | head_insn = next_nonnote_nondebug_insn (loop->start_label); | |
5603 | tail_insn = prev_real_insn (BB_END (bb)); | |
5604 | ||
5605 | i = 0; | |
5606 | FOR_BB_INSNS (bb, insn) | |
5607 | if (NONDEBUG_INSN_P (insn) && insn != loop->loop_end) | |
5608 | insn_copies[0][i++] = insn; | |
5609 | ||
5610 | sploop_max_uid_iter0 = get_max_uid (); | |
5611 | ||
5612 | /* Generate the copies of the loop body, and save them in the | |
5613 | INSN_COPIES array. */ | |
5614 | start_sequence (); | |
5615 | for (i = 0; i < max_parallel; i++) | |
5616 | { | |
5617 | int j; | |
b24ef467 | 5618 | rtx_insn *this_iter; |
758df283 | 5619 | |
5620 | this_iter = duplicate_insn_chain (head_insn, tail_insn); | |
5621 | j = 0; | |
5622 | while (this_iter) | |
5623 | { | |
b24ef467 | 5624 | rtx_insn *prev_stage_insn = insn_copies[i][j]; |
758df283 | 5625 | gcc_assert (INSN_CODE (this_iter) == INSN_CODE (prev_stage_insn)); |
5626 | ||
5627 | if (INSN_CODE (this_iter) >= 0 | |
5628 | && (get_attr_type (this_iter) == TYPE_LOAD_SHADOW | |
5629 | || get_attr_type (this_iter) == TYPE_MULT_SHADOW)) | |
5630 | { | |
b24ef467 | 5631 | rtx_insn *prev = PREV_INSN (this_iter); |
758df283 | 5632 | record_delay_slot_pair (prev, this_iter, |
5633 | get_attr_cycles (prev) - 1, 0); | |
5634 | } | |
5635 | else | |
5636 | record_delay_slot_pair (prev_stage_insn, this_iter, i, 1); | |
5637 | ||
5638 | insn_copies[i + 1][j] = this_iter; | |
5639 | j++; | |
5640 | this_iter = next_nonnote_nondebug_insn (this_iter); | |
5641 | } | |
5642 | } | |
5643 | new_insns = get_insns (); | |
5644 | last_insn = insn_copies[max_parallel][n_real_insns - 1]; | |
5645 | end_sequence (); | |
5646 | emit_insn_before (new_insns, BB_END (bb)); | |
5647 | ||
5648 | /* Try to schedule the loop using varying initiation intervals, | |
5649 | starting with the smallest possible and incrementing it | |
5650 | on failure. */ | |
5651 | for (sp_ii = min_ii; sp_ii <= max_ii; sp_ii++) | |
5652 | { | |
5653 | basic_block tmp_bb; | |
5654 | if (dump_file) | |
5655 | fprintf (dump_file, "Trying to schedule for II %d\n", sp_ii); | |
5656 | ||
5657 | df_clear_flags (DF_LR_RUN_DCE); | |
5658 | ||
5659 | schedule_ebbs_init (); | |
5660 | set_modulo_params (sp_ii, max_parallel, n_real_insns, | |
5661 | sploop_max_uid_iter0); | |
b24ef467 | 5662 | tmp_bb = schedule_ebb (BB_HEAD (bb), last_insn, true); |
758df283 | 5663 | schedule_ebbs_finish (); |
5664 | ||
5665 | if (tmp_bb) | |
5666 | { | |
5667 | if (dump_file) | |
5668 | fprintf (dump_file, "Found schedule with II %d\n", sp_ii); | |
5669 | break; | |
5670 | } | |
5671 | } | |
5672 | ||
5673 | discard_delay_pairs_above (max_uid_before); | |
5674 | ||
5675 | if (sp_ii > max_ii) | |
5676 | goto restore_loop; | |
5677 | ||
5678 | stages = insn_get_clock (ss.last_scheduled_iter0) / sp_ii + 1; | |
5679 | ||
5680 | if (stages == 1 && sp_ii > 5) | |
5681 | goto restore_loop; | |
5682 | ||
5683 | /* At this point, we know we've been successful, unless we find later that | |
5684 | there are too many execute packets for the loop buffer to hold. */ | |
5685 | ||
5686 | /* Assign reservations to the instructions in the loop. We must find | |
5687 | the stage that contains the full loop kernel, and transfer the | |
5688 | reservations of the instructions contained in it to the corresponding | |
5689 | instructions from iteration 0, which are the only ones we'll keep. */ | |
5690 | assign_reservations (BB_HEAD (bb), ss.last_scheduled_insn); | |
4a57a2e8 | 5691 | SET_PREV_INSN (BB_END (bb)) = ss.last_scheduled_iter0; |
5692 | SET_NEXT_INSN (ss.last_scheduled_iter0) = BB_END (bb); | |
758df283 | 5693 | filter_insns_above (bb, sploop_max_uid_iter0); |
5694 | ||
5695 | for (i = 0; i < n_real_insns; i++) | |
5696 | { | |
5697 | rtx insn = insn_copies[0][i]; | |
5698 | int uid = INSN_UID (insn); | |
5699 | int stage = insn_uid_get_clock (uid) / sp_ii; | |
5700 | ||
5701 | if (stage + 1 < stages) | |
5702 | { | |
5703 | int copy_uid; | |
5704 | stage = stages - stage - 1; | |
5705 | copy_uid = INSN_UID (insn_copies[stage][i]); | |
5706 | INSN_INFO_ENTRY (uid).reservation | |
5707 | = INSN_INFO_ENTRY (copy_uid).reservation; | |
5708 | } | |
5709 | } | |
5710 | if (stages == 1) | |
5711 | stages++; | |
5712 | ||
5713 | /* Compute the number of execute packets the pipelined form of the loop will | |
5714 | require. */ | |
b24ef467 | 5715 | prev = NULL; |
758df283 | 5716 | n_execute_packets = 0; |
91a55c11 | 5717 | for (insn = loop->start_label; |
b24ef467 | 5718 | insn != loop->loop_end; |
5719 | insn = NEXT_INSN (insn)) | |
758df283 | 5720 | { |
5721 | if (NONDEBUG_INSN_P (insn) && GET_MODE (insn) == TImode | |
5722 | && !shadow_p (insn)) | |
5723 | { | |
5724 | n_execute_packets++; | |
5725 | if (prev && insn_get_clock (prev) + 1 != insn_get_clock (insn)) | |
5726 | /* We need an extra NOP instruction. */ | |
5727 | n_execute_packets++; | |
5728 | ||
5729 | prev = insn; | |
5730 | } | |
5731 | } | |
5732 | ||
5733 | end_packet = ss.last_scheduled_iter0; | |
5734 | while (!NONDEBUG_INSN_P (end_packet) || GET_MODE (end_packet) != TImode) | |
5735 | end_packet = PREV_INSN (end_packet); | |
5736 | ||
5737 | /* The earliest cycle in which we can emit the SPKERNEL instruction. */ | |
5738 | loop_earliest = (stages - 1) * sp_ii; | |
5739 | if (loop_earliest > insn_get_clock (end_packet)) | |
5740 | { | |
5741 | n_execute_packets++; | |
5742 | end_packet = loop->loop_end; | |
5743 | } | |
5744 | else | |
5745 | loop_earliest = insn_get_clock (end_packet); | |
5746 | ||
5747 | if (n_execute_packets > 14) | |
5748 | goto restore_loop; | |
5749 | ||
5750 | /* Generate the spkernel instruction, and place it at the appropriate | |
5751 | spot. */ | |
5752 | PUT_MODE (end_packet, VOIDmode); | |
5753 | ||
b24ef467 | 5754 | insn = emit_jump_insn_before ( |
5755 | gen_spkernel (GEN_INT (stages - 1), | |
5756 | const0_rtx, JUMP_LABEL (loop->loop_end)), | |
5757 | end_packet); | |
758df283 | 5758 | JUMP_LABEL (insn) = JUMP_LABEL (loop->loop_end); |
5759 | insn_set_clock (insn, loop_earliest); | |
5760 | PUT_MODE (insn, TImode); | |
5761 | INSN_INFO_ENTRY (INSN_UID (insn)).ebb_start = false; | |
5762 | delete_insn (loop->loop_end); | |
5763 | ||
5764 | /* Place the mvc and sploop instructions before the loop. */ | |
5765 | entry_bb = entry_edge->src; | |
5766 | ||
5767 | start_sequence (); | |
5768 | ||
5769 | insn = emit_insn (gen_mvilc (loop->iter_reg)); | |
b022253d | 5770 | if (loop->iter_reg_used_outside) |
5771 | insn = emit_move_insn (loop->iter_reg, const0_rtx); | |
758df283 | 5772 | insn = emit_insn (gen_sploop (GEN_INT (sp_ii))); |
758df283 | 5773 | seq = get_insns (); |
5774 | ||
f1f41a6c | 5775 | if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1) |
758df283 | 5776 | { |
5777 | basic_block new_bb; | |
5778 | edge e; | |
5779 | edge_iterator ei; | |
5780 | ||
5781 | emit_insn_before (seq, BB_HEAD (loop->head)); | |
5782 | seq = emit_label_before (gen_label_rtx (), seq); | |
5783 | ||
5784 | new_bb = create_basic_block (seq, insn, entry_bb); | |
5785 | FOR_EACH_EDGE (e, ei, loop->incoming) | |
5786 | { | |
5787 | if (!(e->flags & EDGE_FALLTHRU)) | |
5788 | redirect_edge_and_branch_force (e, new_bb); | |
5789 | else | |
5790 | redirect_edge_succ (e, new_bb); | |
5791 | } | |
5792 | make_edge (new_bb, loop->head, 0); | |
5793 | } | |
5794 | else | |
5795 | { | |
5796 | entry_after = BB_END (entry_bb); | |
5797 | while (DEBUG_INSN_P (entry_after) | |
5798 | || (NOTE_P (entry_after) | |
5799 | && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK)) | |
5800 | entry_after = PREV_INSN (entry_after); | |
5801 | emit_insn_after (seq, entry_after); | |
5802 | } | |
5803 | ||
5804 | end_sequence (); | |
5805 | ||
5806 | /* Make sure we don't try to schedule this loop again. */ | |
f1f41a6c | 5807 | for (ix = 0; loop->blocks.iterate (ix, &bb); ix++) |
758df283 | 5808 | bb->flags |= BB_DISABLE_SCHEDULE; |
5809 | ||
5810 | return true; | |
5811 | ||
5812 | restore_loop: | |
5813 | if (dump_file) | |
5814 | fprintf (dump_file, "Unable to pipeline loop.\n"); | |
5815 | ||
5816 | for (i = 1; i < n_insns; i++) | |
5817 | { | |
4a57a2e8 | 5818 | SET_NEXT_INSN (orig_vec[i - 1]) = orig_vec[i]; |
5819 | SET_PREV_INSN (orig_vec[i]) = orig_vec[i - 1]; | |
758df283 | 5820 | } |
4a57a2e8 | 5821 | SET_PREV_INSN (orig_vec[0]) = PREV_INSN (BB_HEAD (bb)); |
5822 | SET_NEXT_INSN (PREV_INSN (BB_HEAD (bb))) = orig_vec[0]; | |
5823 | SET_NEXT_INSN (orig_vec[n_insns - 1]) = NEXT_INSN (BB_END (bb)); | |
5824 | SET_PREV_INSN (NEXT_INSN (BB_END (bb))) = orig_vec[n_insns - 1]; | |
26bb3cb2 | 5825 | BB_HEAD (bb) = orig_vec[0]; |
5826 | BB_END (bb) = orig_vec[n_insns - 1]; | |
758df283 | 5827 | undo_splits: |
5828 | free_delay_pairs (); | |
5829 | FOR_BB_INSNS (bb, insn) | |
5830 | if (NONDEBUG_INSN_P (insn)) | |
5831 | undo_split_delayed_nonbranch (insn); | |
5832 | return false; | |
5833 | } | |
5834 | ||
5835 | /* A callback for the hw-doloop pass. Called when a loop we have discovered | |
5836 | turns out not to be optimizable; we have to split the doloop_end pattern | |
5837 | into a subtract and a test. */ | |
5838 | static void | |
5839 | hwloop_fail (hwloop_info loop) | |
5840 | { | |
5841 | rtx insn, test, testreg; | |
5842 | ||
5843 | if (dump_file) | |
5844 | fprintf (dump_file, "splitting doloop insn %d\n", | |
5845 | INSN_UID (loop->loop_end)); | |
5846 | insn = gen_addsi3 (loop->iter_reg, loop->iter_reg, constm1_rtx); | |
5847 | /* See if we can emit the add at the head of the loop rather than at the | |
5848 | end. */ | |
5849 | if (loop->head == NULL | |
5850 | || loop->iter_reg_used_outside | |
5851 | || loop->iter_reg_used | |
5852 | || TEST_HARD_REG_BIT (loop->regs_set_in_loop, REGNO (loop->iter_reg)) | |
5853 | || loop->incoming_dest != loop->head | |
5854 | || EDGE_COUNT (loop->head->preds) != 2) | |
5855 | emit_insn_before (insn, loop->loop_end); | |
5856 | else | |
5857 | { | |
91a55c11 | 5858 | rtx_insn *t = loop->start_label; |
758df283 | 5859 | while (!NOTE_P (t) || NOTE_KIND (t) != NOTE_INSN_BASIC_BLOCK) |
5860 | t = NEXT_INSN (t); | |
5861 | emit_insn_after (insn, t); | |
5862 | } | |
5863 | ||
5864 | testreg = SET_DEST (XVECEXP (PATTERN (loop->loop_end), 0, 2)); | |
5865 | if (GET_CODE (testreg) == SCRATCH) | |
5866 | testreg = loop->iter_reg; | |
5867 | else | |
5868 | emit_insn_before (gen_movsi (testreg, loop->iter_reg), loop->loop_end); | |
5869 | ||
5870 | test = gen_rtx_NE (VOIDmode, testreg, const0_rtx); | |
5871 | insn = emit_jump_insn_before (gen_cbranchsi4 (test, testreg, const0_rtx, | |
5872 | loop->start_label), | |
5873 | loop->loop_end); | |
5874 | ||
5875 | JUMP_LABEL (insn) = loop->start_label; | |
5876 | LABEL_NUSES (loop->start_label)++; | |
5877 | delete_insn (loop->loop_end); | |
5878 | } | |
5879 | ||
5880 | static struct hw_doloop_hooks c6x_doloop_hooks = | |
5881 | { | |
5882 | hwloop_pattern_reg, | |
5883 | hwloop_optimize, | |
5884 | hwloop_fail | |
5885 | }; | |
5886 | ||
5887 | /* Run the hw-doloop pass to modulo-schedule hardware loops, or split the | |
5888 | doloop_end patterns where such optimizations are impossible. */ | |
5889 | static void | |
5890 | c6x_hwloops (void) | |
5891 | { | |
5892 | if (optimize) | |
5893 | reorg_loops (true, &c6x_doloop_hooks); | |
5894 | } | |
5895 | ||
5aa04b01 | 5896 | /* Implement the TARGET_MACHINE_DEPENDENT_REORG pass. We split call insns here |
5897 | into a sequence that loads the return register and performs the call, | |
5898 | and emit the return label. | |
5899 | If scheduling after reload is requested, it happens here. */ | |
5900 | ||
5901 | static void | |
5902 | c6x_reorg (void) | |
5903 | { | |
5904 | basic_block bb; | |
5aa04b01 | 5905 | bool do_selsched = (c6x_flag_schedule_insns2 && flag_selective_scheduling2 |
5906 | && !maybe_skip_selective_scheduling ()); | |
5907 | ||
5908 | /* We are freeing block_for_insn in the toplev to keep compatibility | |
5909 | with old MDEP_REORGS that are not CFG based. Recompute it now. */ | |
5910 | compute_bb_for_insn (); | |
5911 | ||
5912 | df_clear_flags (DF_LR_RUN_DCE); | |
9a4c7d5b | 5913 | df_note_add_problem (); |
5aa04b01 | 5914 | |
5915 | /* If optimizing, we'll have split before scheduling. */ | |
5916 | if (optimize == 0) | |
5917 | split_all_insns (); | |
5918 | ||
9a4c7d5b | 5919 | df_analyze (); |
5920 | ||
5aa04b01 | 5921 | if (c6x_flag_schedule_insns2) |
5922 | { | |
5923 | int sz = get_max_uid () * 3 / 2 + 1; | |
5924 | ||
f1f41a6c | 5925 | insn_info.create (sz); |
758df283 | 5926 | } |
5927 | ||
5928 | /* Make sure the real-jump insns we create are not deleted. When modulo- | |
5929 | scheduling, situations where a reg is only stored in a loop can also | |
5930 | cause dead code when doing the initial unrolling. */ | |
5931 | sched_no_dce = true; | |
5aa04b01 | 5932 | |
758df283 | 5933 | c6x_hwloops (); |
5aa04b01 | 5934 | |
758df283 | 5935 | if (c6x_flag_schedule_insns2) |
5936 | { | |
5aa04b01 | 5937 | split_delayed_insns (); |
5938 | timevar_push (TV_SCHED2); | |
5939 | if (do_selsched) | |
5940 | run_selective_scheduling (); | |
5941 | else | |
5942 | schedule_ebbs (); | |
5943 | conditionalize_after_sched (); | |
5944 | timevar_pop (TV_SCHED2); | |
5945 | ||
5946 | free_delay_pairs (); | |
5aa04b01 | 5947 | } |
758df283 | 5948 | sched_no_dce = false; |
5aa04b01 | 5949 | |
924b3c83 | 5950 | rtx_code_label **call_labels = XCNEWVEC (rtx_code_label *, get_max_uid () + 1); |
5aa04b01 | 5951 | |
5952 | reorg_split_calls (call_labels); | |
5953 | ||
5954 | if (c6x_flag_schedule_insns2) | |
5955 | { | |
fc00614f | 5956 | FOR_EACH_BB_FN (bb, cfun) |
5aa04b01 | 5957 | if ((bb->flags & BB_DISABLE_SCHEDULE) == 0) |
5958 | assign_reservations (BB_HEAD (bb), BB_END (bb)); | |
5959 | } | |
5960 | ||
5961 | if (c6x_flag_var_tracking) | |
5962 | { | |
5963 | timevar_push (TV_VAR_TRACKING); | |
5964 | variable_tracking_main (); | |
5965 | timevar_pop (TV_VAR_TRACKING); | |
5966 | } | |
5967 | ||
5968 | reorg_emit_nops (call_labels); | |
5969 | ||
5970 | /* Post-process the schedule to move parallel insns into SEQUENCEs. */ | |
5971 | if (c6x_flag_schedule_insns2) | |
5972 | { | |
5973 | free_delay_pairs (); | |
5974 | c6x_gen_bundles (); | |
5975 | } | |
5976 | ||
5977 | df_finish_pass (false); | |
5978 | } | |
5979 | ||
5980 | /* Called when a function has been assembled. It should perform all the | |
5981 | tasks of ASM_DECLARE_FUNCTION_SIZE in elfos.h, plus target-specific | |
5982 | tasks. | |
5983 | We free the reservation (and other scheduling) information here now that | |
5984 | all insns have been output. */ | |
5985 | void | |
5986 | c6x_function_end (FILE *file, const char *fname) | |
5987 | { | |
5988 | c6x_output_fn_unwind (file); | |
5989 | ||
f1f41a6c | 5990 | insn_info.release (); |
5aa04b01 | 5991 | |
5992 | if (!flag_inhibit_size_directive) | |
5993 | ASM_OUTPUT_MEASURED_SIZE (file, fname); | |
5994 | } | |
5995 | \f | |
5996 | /* Determine whether X is a shift with code CODE and an integer amount | |
5997 | AMOUNT. */ | |
5998 | static bool | |
5999 | shift_p (rtx x, enum rtx_code code, int amount) | |
6000 | { | |
6001 | return (GET_CODE (x) == code && GET_CODE (XEXP (x, 1)) == CONST_INT | |
6002 | && INTVAL (XEXP (x, 1)) == amount); | |
6003 | } | |
6004 | ||
6005 | /* Compute a (partial) cost for rtx X. Return true if the complete | |
6006 | cost has been computed, and false if subexpressions should be | |
6007 | scanned. In either case, *TOTAL contains the cost result. */ | |
6008 | ||
6009 | static bool | |
5ae4887d | 6010 | c6x_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno, int *total, |
20d892d1 | 6011 | bool speed) |
5aa04b01 | 6012 | { |
6013 | int cost2 = COSTS_N_INSNS (1); | |
6014 | rtx op0, op1; | |
5ae4887d | 6015 | int code = GET_CODE (x); |
5aa04b01 | 6016 | |
6017 | switch (code) | |
6018 | { | |
6019 | case CONST_INT: | |
6020 | if (outer_code == SET || outer_code == PLUS) | |
6021 | *total = satisfies_constraint_IsB (x) ? 0 : cost2; | |
6022 | else if (outer_code == AND || outer_code == IOR || outer_code == XOR | |
6023 | || outer_code == MINUS) | |
6024 | *total = satisfies_constraint_Is5 (x) ? 0 : cost2; | |
6025 | else if (GET_RTX_CLASS (outer_code) == RTX_COMPARE | |
6026 | || GET_RTX_CLASS (outer_code) == RTX_COMM_COMPARE) | |
6027 | *total = satisfies_constraint_Iu4 (x) ? 0 : cost2; | |
6028 | else if (outer_code == ASHIFT || outer_code == ASHIFTRT | |
6029 | || outer_code == LSHIFTRT) | |
6030 | *total = satisfies_constraint_Iu5 (x) ? 0 : cost2; | |
6031 | else | |
6032 | *total = cost2; | |
6033 | return true; | |
6034 | ||
6035 | case CONST: | |
6036 | case LABEL_REF: | |
6037 | case SYMBOL_REF: | |
6038 | case CONST_DOUBLE: | |
6039 | *total = COSTS_N_INSNS (2); | |
6040 | return true; | |
6041 | ||
6042 | case TRUNCATE: | |
6043 | /* Recognize a mult_highpart operation. */ | |
5ae4887d | 6044 | if ((mode == HImode || mode == SImode) |
5aa04b01 | 6045 | && GET_CODE (XEXP (x, 0)) == LSHIFTRT |
28ebc73c | 6046 | && GET_MODE (XEXP (x, 0)) == GET_MODE_2XWIDER_MODE (mode).require () |
5aa04b01 | 6047 | && GET_CODE (XEXP (XEXP (x, 0), 0)) == MULT |
6048 | && GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT | |
5ae4887d | 6049 | && INTVAL (XEXP (XEXP (x, 0), 1)) == GET_MODE_BITSIZE (mode)) |
5aa04b01 | 6050 | { |
6051 | rtx mul = XEXP (XEXP (x, 0), 0); | |
6052 | rtx op0 = XEXP (mul, 0); | |
6053 | rtx op1 = XEXP (mul, 1); | |
6054 | enum rtx_code code0 = GET_CODE (op0); | |
6055 | enum rtx_code code1 = GET_CODE (op1); | |
6056 | ||
6057 | if ((code0 == code1 | |
6058 | && (code0 == SIGN_EXTEND || code0 == ZERO_EXTEND)) | |
5ae4887d | 6059 | || (mode == HImode |
5aa04b01 | 6060 | && code0 == ZERO_EXTEND && code1 == SIGN_EXTEND)) |
6061 | { | |
5ae4887d | 6062 | if (mode == HImode) |
5aa04b01 | 6063 | *total = COSTS_N_INSNS (2); |
6064 | else | |
6065 | *total = COSTS_N_INSNS (12); | |
5ae4887d | 6066 | mode = GET_MODE (XEXP (op0, 0)); |
6067 | *total += rtx_cost (XEXP (op0, 0), mode, code0, 0, speed); | |
6068 | *total += rtx_cost (XEXP (op1, 0), mode, code1, 0, speed); | |
5aa04b01 | 6069 | return true; |
6070 | } | |
6071 | } | |
6072 | return false; | |
6073 | ||
6074 | case ASHIFT: | |
6075 | case ASHIFTRT: | |
6076 | case LSHIFTRT: | |
5ae4887d | 6077 | if (mode == DImode) |
5aa04b01 | 6078 | *total = COSTS_N_INSNS (CONSTANT_P (XEXP (x, 1)) ? 4 : 15); |
6079 | else | |
6080 | *total = COSTS_N_INSNS (1); | |
6081 | return false; | |
6082 | ||
6083 | case PLUS: | |
6084 | case MINUS: | |
6085 | *total = COSTS_N_INSNS (1); | |
6086 | op0 = code == PLUS ? XEXP (x, 0) : XEXP (x, 1); | |
6087 | op1 = code == PLUS ? XEXP (x, 1) : XEXP (x, 0); | |
5ae4887d | 6088 | if (GET_MODE_SIZE (mode) <= UNITS_PER_WORD |
6089 | && INTEGRAL_MODE_P (mode) | |
5aa04b01 | 6090 | && GET_CODE (op0) == MULT |
6091 | && GET_CODE (XEXP (op0, 1)) == CONST_INT | |
6092 | && (INTVAL (XEXP (op0, 1)) == 2 | |
6093 | || INTVAL (XEXP (op0, 1)) == 4 | |
6094 | || (code == PLUS && INTVAL (XEXP (op0, 1)) == 8))) | |
6095 | { | |
5ae4887d | 6096 | *total += rtx_cost (XEXP (op0, 0), mode, ASHIFT, 0, speed); |
6097 | *total += rtx_cost (op1, mode, (enum rtx_code) code, 1, speed); | |
5aa04b01 | 6098 | return true; |
6099 | } | |
6100 | return false; | |
6101 | ||
6102 | case MULT: | |
6103 | op0 = XEXP (x, 0); | |
6104 | op1 = XEXP (x, 1); | |
5ae4887d | 6105 | if (mode == DFmode) |
5aa04b01 | 6106 | { |
6107 | if (TARGET_FP) | |
6108 | *total = COSTS_N_INSNS (speed ? 10 : 1); | |
6109 | else | |
6110 | *total = COSTS_N_INSNS (speed ? 200 : 4); | |
6111 | } | |
5ae4887d | 6112 | else if (mode == SFmode) |
5aa04b01 | 6113 | { |
6114 | if (TARGET_FP) | |
6115 | *total = COSTS_N_INSNS (speed ? 4 : 1); | |
6116 | else | |
6117 | *total = COSTS_N_INSNS (speed ? 100 : 4); | |
6118 | } | |
5ae4887d | 6119 | else if (mode == DImode) |
5aa04b01 | 6120 | { |
6121 | if (TARGET_MPY32 | |
6122 | && GET_CODE (op0) == GET_CODE (op1) | |
6123 | && (GET_CODE (op0) == ZERO_EXTEND | |
6124 | || GET_CODE (op0) == SIGN_EXTEND)) | |
6125 | { | |
6126 | *total = COSTS_N_INSNS (speed ? 2 : 1); | |
6127 | op0 = XEXP (op0, 0); | |
6128 | op1 = XEXP (op1, 0); | |
6129 | } | |
6130 | else | |
6131 | /* Maybe improve this laster. */ | |
6132 | *total = COSTS_N_INSNS (20); | |
6133 | } | |
5ae4887d | 6134 | else if (mode == SImode) |
5aa04b01 | 6135 | { |
6136 | if (((GET_CODE (op0) == ZERO_EXTEND | |
6137 | || GET_CODE (op0) == SIGN_EXTEND | |
6138 | || shift_p (op0, LSHIFTRT, 16)) | |
6139 | && (GET_CODE (op1) == SIGN_EXTEND | |
6140 | || GET_CODE (op1) == ZERO_EXTEND | |
6141 | || scst5_operand (op1, SImode) | |
6142 | || shift_p (op1, ASHIFTRT, 16) | |
6143 | || shift_p (op1, LSHIFTRT, 16))) | |
6144 | || (shift_p (op0, ASHIFTRT, 16) | |
6145 | && (GET_CODE (op1) == SIGN_EXTEND | |
6146 | || shift_p (op1, ASHIFTRT, 16)))) | |
6147 | { | |
6148 | *total = COSTS_N_INSNS (speed ? 2 : 1); | |
6149 | op0 = XEXP (op0, 0); | |
6150 | if (scst5_operand (op1, SImode)) | |
6151 | op1 = NULL_RTX; | |
6152 | else | |
6153 | op1 = XEXP (op1, 0); | |
6154 | } | |
6155 | else if (!speed) | |
6156 | *total = COSTS_N_INSNS (1); | |
6157 | else if (TARGET_MPY32) | |
6158 | *total = COSTS_N_INSNS (4); | |
6159 | else | |
6160 | *total = COSTS_N_INSNS (6); | |
6161 | } | |
5ae4887d | 6162 | else if (mode == HImode) |
5aa04b01 | 6163 | *total = COSTS_N_INSNS (speed ? 2 : 1); |
6164 | ||
6165 | if (GET_CODE (op0) != REG | |
6166 | && (GET_CODE (op0) != SUBREG || GET_CODE (SUBREG_REG (op0)) != REG)) | |
5ae4887d | 6167 | *total += rtx_cost (op0, mode, MULT, 0, speed); |
5aa04b01 | 6168 | if (op1 && GET_CODE (op1) != REG |
6169 | && (GET_CODE (op1) != SUBREG || GET_CODE (SUBREG_REG (op1)) != REG)) | |
5ae4887d | 6170 | *total += rtx_cost (op1, mode, MULT, 1, speed); |
5aa04b01 | 6171 | return true; |
6172 | ||
6173 | case UDIV: | |
6174 | case DIV: | |
6175 | /* This is a bit random; assuming on average there'll be 16 leading | |
6176 | zeros. FIXME: estimate better for constant dividends. */ | |
6177 | *total = COSTS_N_INSNS (6 + 3 * 16); | |
6178 | return false; | |
6179 | ||
6180 | case IF_THEN_ELSE: | |
6181 | /* Recognize the cmp_and/ior patterns. */ | |
6182 | op0 = XEXP (x, 0); | |
6183 | if ((GET_CODE (op0) == EQ || GET_CODE (op0) == NE) | |
6184 | && REG_P (XEXP (op0, 0)) | |
6185 | && XEXP (op0, 1) == const0_rtx | |
6186 | && rtx_equal_p (XEXP (x, 1), XEXP (op0, 0))) | |
6187 | { | |
5ae4887d | 6188 | *total = rtx_cost (XEXP (x, 1), VOIDmode, (enum rtx_code) outer_code, |
20d892d1 | 6189 | opno, speed); |
5aa04b01 | 6190 | return false; |
6191 | } | |
6192 | return false; | |
6193 | ||
6194 | default: | |
6195 | return false; | |
6196 | } | |
6197 | } | |
6198 | ||
6199 | /* Implements target hook vector_mode_supported_p. */ | |
6200 | ||
6201 | static bool | |
3754d046 | 6202 | c6x_vector_mode_supported_p (machine_mode mode) |
5aa04b01 | 6203 | { |
6204 | switch (mode) | |
6205 | { | |
916ace94 | 6206 | case E_V2HImode: |
6207 | case E_V4QImode: | |
6208 | case E_V2SImode: | |
6209 | case E_V4HImode: | |
6210 | case E_V8QImode: | |
5aa04b01 | 6211 | return true; |
6212 | default: | |
6213 | return false; | |
6214 | } | |
6215 | } | |
6216 | ||
6217 | /* Implements TARGET_VECTORIZE_PREFERRED_SIMD_MODE. */ | |
3754d046 | 6218 | static machine_mode |
4c1a1be2 | 6219 | c6x_preferred_simd_mode (scalar_mode mode) |
5aa04b01 | 6220 | { |
6221 | switch (mode) | |
6222 | { | |
916ace94 | 6223 | case E_HImode: |
5aa04b01 | 6224 | return V2HImode; |
916ace94 | 6225 | case E_QImode: |
5aa04b01 | 6226 | return V4QImode; |
6227 | ||
6228 | default: | |
6229 | return word_mode; | |
6230 | } | |
6231 | } | |
6232 | ||
6233 | /* Implement TARGET_SCALAR_MODE_SUPPORTED_P. */ | |
6234 | ||
6235 | static bool | |
8aec1ebb | 6236 | c6x_scalar_mode_supported_p (scalar_mode mode) |
5aa04b01 | 6237 | { |
6238 | if (ALL_FIXED_POINT_MODE_P (mode) | |
6239 | && GET_MODE_PRECISION (mode) <= 2 * BITS_PER_WORD) | |
6240 | return true; | |
6241 | ||
6242 | return default_scalar_mode_supported_p (mode); | |
6243 | } | |
6244 | ||
6245 | /* Output a reference from a function exception table to the type_info | |
6246 | object X. Output these via a special assembly directive. */ | |
6247 | ||
6248 | static bool | |
6249 | c6x_output_ttype (rtx x) | |
6250 | { | |
6251 | /* Use special relocations for symbol references. */ | |
6252 | if (GET_CODE (x) != CONST_INT) | |
6253 | fputs ("\t.ehtype\t", asm_out_file); | |
6254 | else | |
6255 | fputs ("\t.word\t", asm_out_file); | |
6256 | output_addr_const (asm_out_file, x); | |
6257 | fputc ('\n', asm_out_file); | |
6258 | ||
6259 | return TRUE; | |
6260 | } | |
6261 | ||
6262 | /* Modify the return address of the current function. */ | |
6263 | ||
6264 | void | |
6265 | c6x_set_return_address (rtx source, rtx scratch) | |
6266 | { | |
6267 | struct c6x_frame frame; | |
6268 | rtx addr; | |
6269 | HOST_WIDE_INT offset; | |
6270 | ||
6271 | c6x_compute_frame_layout (&frame); | |
6272 | if (! c6x_save_reg (RETURN_ADDR_REGNO)) | |
6273 | emit_move_insn (gen_rtx_REG (Pmode, RETURN_ADDR_REGNO), source); | |
6274 | else | |
6275 | { | |
6276 | ||
6277 | if (frame_pointer_needed) | |
6278 | { | |
6279 | addr = hard_frame_pointer_rtx; | |
6280 | offset = frame.b3_offset; | |
6281 | } | |
6282 | else | |
6283 | { | |
6284 | addr = stack_pointer_rtx; | |
6285 | offset = frame.to_allocate - frame.b3_offset; | |
6286 | } | |
6287 | ||
6288 | /* TODO: Use base+offset loads where possible. */ | |
6289 | if (offset) | |
6290 | { | |
6291 | HOST_WIDE_INT low = trunc_int_for_mode (offset, HImode); | |
6292 | ||
6293 | emit_insn (gen_movsi_high (scratch, GEN_INT (low))); | |
6294 | if (low != offset) | |
6295 | emit_insn (gen_movsi_lo_sum (scratch, scratch, GEN_INT(offset))); | |
6296 | emit_insn (gen_addsi3 (scratch, addr, scratch)); | |
6297 | addr = scratch; | |
6298 | } | |
6299 | ||
6300 | emit_move_insn (gen_frame_mem (Pmode, addr), source); | |
6301 | } | |
6302 | } | |
6303 | ||
6304 | /* We save pairs of registers using a DImode store. Describe the component | |
6305 | registers for DWARF generation code. */ | |
6306 | ||
6307 | static rtx | |
6308 | c6x_dwarf_register_span (rtx rtl) | |
6309 | { | |
6310 | unsigned regno; | |
6311 | unsigned real_regno; | |
6312 | int nregs; | |
6313 | int i; | |
6314 | rtx p; | |
6315 | ||
6316 | regno = REGNO (rtl); | |
10fa8f76 | 6317 | nregs = REG_NREGS (rtl); |
5aa04b01 | 6318 | if (nregs == 1) |
6319 | return NULL_RTX; | |
6320 | ||
6321 | p = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc(nregs)); | |
6322 | for (i = 0; i < nregs; i++) | |
6323 | { | |
6324 | if (TARGET_BIG_ENDIAN) | |
6325 | real_regno = regno + nregs - (i + 1); | |
6326 | else | |
6327 | real_regno = regno + i; | |
6328 | ||
6329 | XVECEXP (p, 0, i) = gen_rtx_REG (SImode, real_regno); | |
6330 | } | |
6331 | ||
6332 | return p; | |
6333 | } | |
6334 | \f | |
6335 | /* Codes for all the C6X builtins. */ | |
6336 | enum c6x_builtins | |
6337 | { | |
6338 | C6X_BUILTIN_SADD, | |
6339 | C6X_BUILTIN_SSUB, | |
6340 | C6X_BUILTIN_ADD2, | |
6341 | C6X_BUILTIN_SUB2, | |
6342 | C6X_BUILTIN_ADD4, | |
6343 | C6X_BUILTIN_SUB4, | |
6344 | C6X_BUILTIN_SADD2, | |
6345 | C6X_BUILTIN_SSUB2, | |
6346 | C6X_BUILTIN_SADDU4, | |
6347 | ||
6348 | C6X_BUILTIN_SMPY, | |
6349 | C6X_BUILTIN_SMPYH, | |
6350 | C6X_BUILTIN_SMPYHL, | |
6351 | C6X_BUILTIN_SMPYLH, | |
6352 | C6X_BUILTIN_MPY2, | |
6353 | C6X_BUILTIN_SMPY2, | |
6354 | ||
6355 | C6X_BUILTIN_CLRR, | |
6356 | C6X_BUILTIN_EXTR, | |
6357 | C6X_BUILTIN_EXTRU, | |
6358 | ||
6359 | C6X_BUILTIN_SSHL, | |
6360 | C6X_BUILTIN_SUBC, | |
6361 | C6X_BUILTIN_ABS, | |
6362 | C6X_BUILTIN_ABS2, | |
6363 | C6X_BUILTIN_AVG2, | |
6364 | C6X_BUILTIN_AVGU4, | |
6365 | ||
6366 | C6X_BUILTIN_MAX | |
6367 | }; | |
6368 | ||
6369 | ||
6370 | static GTY(()) tree c6x_builtin_decls[C6X_BUILTIN_MAX]; | |
6371 | ||
6372 | /* Return the C6X builtin for CODE. */ | |
6373 | static tree | |
6374 | c6x_builtin_decl (unsigned code, bool initialize_p ATTRIBUTE_UNUSED) | |
6375 | { | |
6376 | if (code >= C6X_BUILTIN_MAX) | |
6377 | return error_mark_node; | |
6378 | ||
6379 | return c6x_builtin_decls[code]; | |
6380 | } | |
6381 | ||
6382 | #define def_builtin(NAME, TYPE, CODE) \ | |
6383 | do { \ | |
6384 | tree bdecl; \ | |
6385 | bdecl = add_builtin_function ((NAME), (TYPE), (CODE), BUILT_IN_MD, \ | |
6386 | NULL, NULL_TREE); \ | |
6387 | c6x_builtin_decls[CODE] = bdecl; \ | |
6388 | } while (0) | |
6389 | ||
6390 | /* Set up all builtin functions for this target. */ | |
6391 | static void | |
6392 | c6x_init_builtins (void) | |
6393 | { | |
6394 | tree V4QI_type_node = build_vector_type (unsigned_intQI_type_node, 4); | |
6395 | tree V2HI_type_node = build_vector_type (intHI_type_node, 2); | |
6396 | tree V2SI_type_node = build_vector_type (intSI_type_node, 2); | |
6397 | tree int_ftype_int | |
6398 | = build_function_type_list (integer_type_node, integer_type_node, | |
6399 | NULL_TREE); | |
6400 | tree int_ftype_int_int | |
6401 | = build_function_type_list (integer_type_node, integer_type_node, | |
6402 | integer_type_node, NULL_TREE); | |
6403 | tree v2hi_ftype_v2hi | |
6404 | = build_function_type_list (V2HI_type_node, V2HI_type_node, NULL_TREE); | |
6405 | tree v4qi_ftype_v4qi_v4qi | |
6406 | = build_function_type_list (V4QI_type_node, V4QI_type_node, | |
6407 | V4QI_type_node, NULL_TREE); | |
6408 | tree v2hi_ftype_v2hi_v2hi | |
6409 | = build_function_type_list (V2HI_type_node, V2HI_type_node, | |
6410 | V2HI_type_node, NULL_TREE); | |
6411 | tree v2si_ftype_v2hi_v2hi | |
6412 | = build_function_type_list (V2SI_type_node, V2HI_type_node, | |
6413 | V2HI_type_node, NULL_TREE); | |
6414 | ||
6415 | def_builtin ("__builtin_c6x_sadd", int_ftype_int_int, | |
6416 | C6X_BUILTIN_SADD); | |
6417 | def_builtin ("__builtin_c6x_ssub", int_ftype_int_int, | |
6418 | C6X_BUILTIN_SSUB); | |
6419 | def_builtin ("__builtin_c6x_add2", v2hi_ftype_v2hi_v2hi, | |
6420 | C6X_BUILTIN_ADD2); | |
6421 | def_builtin ("__builtin_c6x_sub2", v2hi_ftype_v2hi_v2hi, | |
6422 | C6X_BUILTIN_SUB2); | |
6423 | def_builtin ("__builtin_c6x_add4", v4qi_ftype_v4qi_v4qi, | |
6424 | C6X_BUILTIN_ADD4); | |
6425 | def_builtin ("__builtin_c6x_sub4", v4qi_ftype_v4qi_v4qi, | |
6426 | C6X_BUILTIN_SUB4); | |
6427 | def_builtin ("__builtin_c6x_mpy2", v2si_ftype_v2hi_v2hi, | |
6428 | C6X_BUILTIN_MPY2); | |
6429 | def_builtin ("__builtin_c6x_sadd2", v2hi_ftype_v2hi_v2hi, | |
6430 | C6X_BUILTIN_SADD2); | |
6431 | def_builtin ("__builtin_c6x_ssub2", v2hi_ftype_v2hi_v2hi, | |
6432 | C6X_BUILTIN_SSUB2); | |
6433 | def_builtin ("__builtin_c6x_saddu4", v4qi_ftype_v4qi_v4qi, | |
6434 | C6X_BUILTIN_SADDU4); | |
6435 | def_builtin ("__builtin_c6x_smpy2", v2si_ftype_v2hi_v2hi, | |
6436 | C6X_BUILTIN_SMPY2); | |
6437 | ||
6438 | def_builtin ("__builtin_c6x_smpy", int_ftype_int_int, | |
6439 | C6X_BUILTIN_SMPY); | |
6440 | def_builtin ("__builtin_c6x_smpyh", int_ftype_int_int, | |
6441 | C6X_BUILTIN_SMPYH); | |
6442 | def_builtin ("__builtin_c6x_smpyhl", int_ftype_int_int, | |
6443 | C6X_BUILTIN_SMPYHL); | |
6444 | def_builtin ("__builtin_c6x_smpylh", int_ftype_int_int, | |
6445 | C6X_BUILTIN_SMPYLH); | |
6446 | ||
6447 | def_builtin ("__builtin_c6x_sshl", int_ftype_int_int, | |
6448 | C6X_BUILTIN_SSHL); | |
6449 | def_builtin ("__builtin_c6x_subc", int_ftype_int_int, | |
6450 | C6X_BUILTIN_SUBC); | |
6451 | ||
6452 | def_builtin ("__builtin_c6x_avg2", v2hi_ftype_v2hi_v2hi, | |
6453 | C6X_BUILTIN_AVG2); | |
6454 | def_builtin ("__builtin_c6x_avgu4", v4qi_ftype_v4qi_v4qi, | |
6455 | C6X_BUILTIN_AVGU4); | |
6456 | ||
6457 | def_builtin ("__builtin_c6x_clrr", int_ftype_int_int, | |
6458 | C6X_BUILTIN_CLRR); | |
6459 | def_builtin ("__builtin_c6x_extr", int_ftype_int_int, | |
6460 | C6X_BUILTIN_EXTR); | |
6461 | def_builtin ("__builtin_c6x_extru", int_ftype_int_int, | |
6462 | C6X_BUILTIN_EXTRU); | |
6463 | ||
6464 | def_builtin ("__builtin_c6x_abs", int_ftype_int, C6X_BUILTIN_ABS); | |
6465 | def_builtin ("__builtin_c6x_abs2", v2hi_ftype_v2hi, C6X_BUILTIN_ABS2); | |
6466 | } | |
6467 | ||
6468 | ||
6469 | struct builtin_description | |
6470 | { | |
6471 | const enum insn_code icode; | |
6472 | const char *const name; | |
6473 | const enum c6x_builtins code; | |
6474 | }; | |
6475 | ||
6476 | static const struct builtin_description bdesc_2arg[] = | |
6477 | { | |
6478 | { CODE_FOR_saddsi3, "__builtin_c6x_sadd", C6X_BUILTIN_SADD }, | |
6479 | { CODE_FOR_ssubsi3, "__builtin_c6x_ssub", C6X_BUILTIN_SSUB }, | |
6480 | { CODE_FOR_addv2hi3, "__builtin_c6x_add2", C6X_BUILTIN_ADD2 }, | |
6481 | { CODE_FOR_subv2hi3, "__builtin_c6x_sub2", C6X_BUILTIN_SUB2 }, | |
6482 | { CODE_FOR_addv4qi3, "__builtin_c6x_add4", C6X_BUILTIN_ADD4 }, | |
6483 | { CODE_FOR_subv4qi3, "__builtin_c6x_sub4", C6X_BUILTIN_SUB4 }, | |
6484 | { CODE_FOR_ss_addv2hi3, "__builtin_c6x_sadd2", C6X_BUILTIN_SADD2 }, | |
6485 | { CODE_FOR_ss_subv2hi3, "__builtin_c6x_ssub2", C6X_BUILTIN_SSUB2 }, | |
6486 | { CODE_FOR_us_addv4qi3, "__builtin_c6x_saddu4", C6X_BUILTIN_SADDU4 }, | |
6487 | ||
6488 | { CODE_FOR_subcsi3, "__builtin_c6x_subc", C6X_BUILTIN_SUBC }, | |
6489 | { CODE_FOR_ss_ashlsi3, "__builtin_c6x_sshl", C6X_BUILTIN_SSHL }, | |
6490 | ||
6491 | { CODE_FOR_avgv2hi3, "__builtin_c6x_avg2", C6X_BUILTIN_AVG2 }, | |
6492 | { CODE_FOR_uavgv4qi3, "__builtin_c6x_avgu4", C6X_BUILTIN_AVGU4 }, | |
6493 | ||
6494 | { CODE_FOR_mulhqsq3, "__builtin_c6x_smpy", C6X_BUILTIN_SMPY }, | |
6495 | { CODE_FOR_mulhqsq3_hh, "__builtin_c6x_smpyh", C6X_BUILTIN_SMPYH }, | |
6496 | { CODE_FOR_mulhqsq3_lh, "__builtin_c6x_smpylh", C6X_BUILTIN_SMPYLH }, | |
6497 | { CODE_FOR_mulhqsq3_hl, "__builtin_c6x_smpyhl", C6X_BUILTIN_SMPYHL }, | |
6498 | ||
6499 | { CODE_FOR_mulv2hqv2sq3, "__builtin_c6x_smpy2", C6X_BUILTIN_SMPY2 }, | |
6500 | ||
6501 | { CODE_FOR_clrr, "__builtin_c6x_clrr", C6X_BUILTIN_CLRR }, | |
6502 | { CODE_FOR_extr, "__builtin_c6x_extr", C6X_BUILTIN_EXTR }, | |
6503 | { CODE_FOR_extru, "__builtin_c6x_extru", C6X_BUILTIN_EXTRU } | |
6504 | }; | |
6505 | ||
6506 | static const struct builtin_description bdesc_1arg[] = | |
6507 | { | |
6508 | { CODE_FOR_ssabssi2, "__builtin_c6x_abs", C6X_BUILTIN_ABS }, | |
6509 | { CODE_FOR_ssabsv2hi2, "__builtin_c6x_abs2", C6X_BUILTIN_ABS2 } | |
6510 | }; | |
6511 | ||
6512 | /* Errors in the source file can cause expand_expr to return const0_rtx | |
6513 | where we expect a vector. To avoid crashing, use one of the vector | |
6514 | clear instructions. */ | |
6515 | static rtx | |
3754d046 | 6516 | safe_vector_operand (rtx x, machine_mode mode) |
5aa04b01 | 6517 | { |
6518 | if (x != const0_rtx) | |
6519 | return x; | |
6520 | x = gen_reg_rtx (SImode); | |
6521 | ||
6522 | emit_insn (gen_movsi (x, CONST0_RTX (SImode))); | |
6523 | return gen_lowpart (mode, x); | |
6524 | } | |
6525 | ||
6526 | /* Subroutine of c6x_expand_builtin to take care of binop insns. MACFLAG is -1 | |
6527 | if this is a normal binary op, or one of the MACFLAG_xxx constants. */ | |
6528 | ||
6529 | static rtx | |
6530 | c6x_expand_binop_builtin (enum insn_code icode, tree exp, rtx target, | |
6531 | bool match_op) | |
6532 | { | |
6533 | int offs = match_op ? 1 : 0; | |
6534 | rtx pat; | |
6535 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6536 | tree arg1 = CALL_EXPR_ARG (exp, 1); | |
6537 | rtx op0 = expand_expr (arg0, NULL_RTX, VOIDmode, EXPAND_NORMAL); | |
6538 | rtx op1 = expand_expr (arg1, NULL_RTX, VOIDmode, EXPAND_NORMAL); | |
3754d046 | 6539 | machine_mode op0mode = GET_MODE (op0); |
6540 | machine_mode op1mode = GET_MODE (op1); | |
6541 | machine_mode tmode = insn_data[icode].operand[0].mode; | |
6542 | machine_mode mode0 = insn_data[icode].operand[1 + offs].mode; | |
6543 | machine_mode mode1 = insn_data[icode].operand[2 + offs].mode; | |
5aa04b01 | 6544 | rtx ret = target; |
6545 | ||
6546 | if (VECTOR_MODE_P (mode0)) | |
6547 | op0 = safe_vector_operand (op0, mode0); | |
6548 | if (VECTOR_MODE_P (mode1)) | |
6549 | op1 = safe_vector_operand (op1, mode1); | |
6550 | ||
6551 | if (! target | |
6552 | || GET_MODE (target) != tmode | |
6553 | || ! (*insn_data[icode].operand[0].predicate) (target, tmode)) | |
6554 | { | |
6555 | if (tmode == SQmode || tmode == V2SQmode) | |
6556 | { | |
6557 | ret = gen_reg_rtx (tmode == SQmode ? SImode : V2SImode); | |
6558 | target = gen_lowpart (tmode, ret); | |
6559 | } | |
6560 | else | |
6561 | target = gen_reg_rtx (tmode); | |
6562 | } | |
6563 | ||
6564 | if ((op0mode == V2HImode || op0mode == SImode || op0mode == VOIDmode) | |
6565 | && (mode0 == V2HQmode || mode0 == HQmode || mode0 == SQmode)) | |
6566 | { | |
6567 | op0mode = mode0; | |
6568 | op0 = gen_lowpart (mode0, op0); | |
6569 | } | |
6570 | if ((op1mode == V2HImode || op1mode == SImode || op1mode == VOIDmode) | |
6571 | && (mode1 == V2HQmode || mode1 == HQmode || mode1 == SQmode)) | |
6572 | { | |
6573 | op1mode = mode1; | |
6574 | op1 = gen_lowpart (mode1, op1); | |
6575 | } | |
6576 | /* In case the insn wants input operands in modes different from | |
6577 | the result, abort. */ | |
6578 | gcc_assert ((op0mode == mode0 || op0mode == VOIDmode) | |
6579 | && (op1mode == mode1 || op1mode == VOIDmode)); | |
6580 | ||
6581 | if (! (*insn_data[icode].operand[1 + offs].predicate) (op0, mode0)) | |
6582 | op0 = copy_to_mode_reg (mode0, op0); | |
6583 | if (! (*insn_data[icode].operand[2 + offs].predicate) (op1, mode1)) | |
6584 | op1 = copy_to_mode_reg (mode1, op1); | |
6585 | ||
6586 | if (match_op) | |
6587 | pat = GEN_FCN (icode) (target, target, op0, op1); | |
6588 | else | |
6589 | pat = GEN_FCN (icode) (target, op0, op1); | |
6590 | ||
6591 | if (! pat) | |
6592 | return 0; | |
6593 | ||
6594 | emit_insn (pat); | |
6595 | ||
6596 | return ret; | |
6597 | } | |
6598 | ||
6599 | /* Subroutine of c6x_expand_builtin to take care of unop insns. */ | |
6600 | ||
6601 | static rtx | |
6602 | c6x_expand_unop_builtin (enum insn_code icode, tree exp, | |
6603 | rtx target) | |
6604 | { | |
6605 | rtx pat; | |
6606 | tree arg0 = CALL_EXPR_ARG (exp, 0); | |
6607 | rtx op0 = expand_expr (arg0, NULL_RTX, VOIDmode, EXPAND_NORMAL); | |
3754d046 | 6608 | machine_mode op0mode = GET_MODE (op0); |
6609 | machine_mode tmode = insn_data[icode].operand[0].mode; | |
6610 | machine_mode mode0 = insn_data[icode].operand[1].mode; | |
5aa04b01 | 6611 | |
6612 | if (! target | |
6613 | || GET_MODE (target) != tmode | |
6614 | || ! (*insn_data[icode].operand[0].predicate) (target, tmode)) | |
6615 | target = gen_reg_rtx (tmode); | |
6616 | ||
6617 | if (VECTOR_MODE_P (mode0)) | |
6618 | op0 = safe_vector_operand (op0, mode0); | |
6619 | ||
6620 | if (op0mode == SImode && mode0 == HImode) | |
6621 | { | |
6622 | op0mode = HImode; | |
6623 | op0 = gen_lowpart (HImode, op0); | |
6624 | } | |
6625 | gcc_assert (op0mode == mode0 || op0mode == VOIDmode); | |
6626 | ||
6627 | if (! (*insn_data[icode].operand[1].predicate) (op0, mode0)) | |
6628 | op0 = copy_to_mode_reg (mode0, op0); | |
6629 | ||
6630 | pat = GEN_FCN (icode) (target, op0); | |
6631 | if (! pat) | |
6632 | return 0; | |
6633 | emit_insn (pat); | |
6634 | return target; | |
6635 | } | |
6636 | ||
6637 | /* Expand an expression EXP that calls a built-in function, | |
6638 | with result going to TARGET if that's convenient | |
6639 | (and in mode MODE if that's convenient). | |
6640 | SUBTARGET may be used as the target for computing one of EXP's operands. | |
6641 | IGNORE is nonzero if the value is to be ignored. */ | |
6642 | ||
6643 | static rtx | |
6644 | c6x_expand_builtin (tree exp, rtx target ATTRIBUTE_UNUSED, | |
6645 | rtx subtarget ATTRIBUTE_UNUSED, | |
3754d046 | 6646 | machine_mode mode ATTRIBUTE_UNUSED, |
5aa04b01 | 6647 | int ignore ATTRIBUTE_UNUSED) |
6648 | { | |
6649 | size_t i; | |
6650 | const struct builtin_description *d; | |
6651 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); | |
6652 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
6653 | ||
6654 | for (i = 0, d = bdesc_2arg; i < ARRAY_SIZE (bdesc_2arg); i++, d++) | |
6655 | if (d->code == fcode) | |
6656 | return c6x_expand_binop_builtin (d->icode, exp, target, | |
6657 | fcode == C6X_BUILTIN_CLRR); | |
6658 | ||
6659 | for (i = 0, d = bdesc_1arg; i < ARRAY_SIZE (bdesc_1arg); i++, d++) | |
6660 | if (d->code == fcode) | |
6661 | return c6x_expand_unop_builtin (d->icode, exp, target); | |
6662 | ||
6663 | gcc_unreachable (); | |
6664 | } | |
7e5fc0c4 | 6665 | |
6666 | /* Target unwind frame info is generated from dwarf CFI directives, so | |
6667 | always output dwarf2 unwind info. */ | |
6668 | ||
6669 | static enum unwind_info_type | |
6670 | c6x_debug_unwind_info (void) | |
6671 | { | |
6672 | if (flag_unwind_tables || flag_exceptions) | |
6673 | return UI_DWARF2; | |
6674 | ||
6675 | return default_debug_unwind_info (); | |
6676 | } | |
b395382f | 6677 | |
6678 | /* Implement TARGET_HARD_REGNO_MODE_OK. */ | |
6679 | ||
6680 | static bool | |
6681 | c6x_hard_regno_mode_ok (unsigned int regno, machine_mode mode) | |
6682 | { | |
6683 | return GET_MODE_SIZE (mode) <= UNITS_PER_WORD || (regno & 1) == 0; | |
6684 | } | |
5f6dcf1a | 6685 | |
6686 | /* Implement TARGET_MODES_TIEABLE_P. */ | |
6687 | ||
6688 | static bool | |
6689 | c6x_modes_tieable_p (machine_mode mode1, machine_mode mode2) | |
6690 | { | |
6691 | return (mode1 == mode2 | |
6692 | || (GET_MODE_SIZE (mode1) <= UNITS_PER_WORD | |
6693 | && GET_MODE_SIZE (mode2) <= UNITS_PER_WORD)); | |
6694 | } | |
6695 | ||
5aa04b01 | 6696 | \f |
6697 | /* Target Structure. */ | |
6698 | ||
6699 | /* Initialize the GCC target structure. */ | |
6700 | #undef TARGET_FUNCTION_ARG | |
6701 | #define TARGET_FUNCTION_ARG c6x_function_arg | |
6702 | #undef TARGET_FUNCTION_ARG_ADVANCE | |
6703 | #define TARGET_FUNCTION_ARG_ADVANCE c6x_function_arg_advance | |
6704 | #undef TARGET_FUNCTION_ARG_BOUNDARY | |
6705 | #define TARGET_FUNCTION_ARG_BOUNDARY c6x_function_arg_boundary | |
6706 | #undef TARGET_FUNCTION_ARG_ROUND_BOUNDARY | |
6707 | #define TARGET_FUNCTION_ARG_ROUND_BOUNDARY \ | |
6708 | c6x_function_arg_round_boundary | |
6709 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
6710 | #define TARGET_FUNCTION_VALUE_REGNO_P c6x_function_value_regno_p | |
6711 | #undef TARGET_FUNCTION_VALUE | |
6712 | #define TARGET_FUNCTION_VALUE c6x_function_value | |
6713 | #undef TARGET_LIBCALL_VALUE | |
6714 | #define TARGET_LIBCALL_VALUE c6x_libcall_value | |
6715 | #undef TARGET_RETURN_IN_MEMORY | |
6716 | #define TARGET_RETURN_IN_MEMORY c6x_return_in_memory | |
6717 | #undef TARGET_RETURN_IN_MSB | |
6718 | #define TARGET_RETURN_IN_MSB c6x_return_in_msb | |
6719 | #undef TARGET_PASS_BY_REFERENCE | |
6720 | #define TARGET_PASS_BY_REFERENCE c6x_pass_by_reference | |
6721 | #undef TARGET_CALLEE_COPIES | |
6722 | #define TARGET_CALLEE_COPIES c6x_callee_copies | |
6723 | #undef TARGET_STRUCT_VALUE_RTX | |
6724 | #define TARGET_STRUCT_VALUE_RTX c6x_struct_value_rtx | |
6725 | #undef TARGET_FUNCTION_OK_FOR_SIBCALL | |
6726 | #define TARGET_FUNCTION_OK_FOR_SIBCALL c6x_function_ok_for_sibcall | |
6727 | ||
6728 | #undef TARGET_ASM_OUTPUT_MI_THUNK | |
6729 | #define TARGET_ASM_OUTPUT_MI_THUNK c6x_output_mi_thunk | |
6730 | #undef TARGET_ASM_CAN_OUTPUT_MI_THUNK | |
6731 | #define TARGET_ASM_CAN_OUTPUT_MI_THUNK c6x_can_output_mi_thunk | |
6732 | ||
6733 | #undef TARGET_BUILD_BUILTIN_VA_LIST | |
6734 | #define TARGET_BUILD_BUILTIN_VA_LIST c6x_build_builtin_va_list | |
6735 | ||
6736 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE | |
6737 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE c6x_asm_trampoline_template | |
6738 | #undef TARGET_TRAMPOLINE_INIT | |
6739 | #define TARGET_TRAMPOLINE_INIT c6x_initialize_trampoline | |
6740 | ||
6741 | #undef TARGET_LEGITIMATE_CONSTANT_P | |
6742 | #define TARGET_LEGITIMATE_CONSTANT_P c6x_legitimate_constant_p | |
6743 | #undef TARGET_LEGITIMATE_ADDRESS_P | |
6744 | #define TARGET_LEGITIMATE_ADDRESS_P c6x_legitimate_address_p | |
6745 | ||
e46fbef5 | 6746 | #undef TARGET_LRA_P |
6747 | #define TARGET_LRA_P hook_bool_void_false | |
6748 | ||
5aa04b01 | 6749 | #undef TARGET_IN_SMALL_DATA_P |
6750 | #define TARGET_IN_SMALL_DATA_P c6x_in_small_data_p | |
6751 | #undef TARGET_ASM_SELECT_RTX_SECTION | |
6752 | #define TARGET_ASM_SELECT_RTX_SECTION c6x_select_rtx_section | |
6753 | #undef TARGET_ASM_SELECT_SECTION | |
6754 | #define TARGET_ASM_SELECT_SECTION c6x_elf_select_section | |
6755 | #undef TARGET_ASM_UNIQUE_SECTION | |
6756 | #define TARGET_ASM_UNIQUE_SECTION c6x_elf_unique_section | |
6757 | #undef TARGET_SECTION_TYPE_FLAGS | |
6758 | #define TARGET_SECTION_TYPE_FLAGS c6x_section_type_flags | |
6759 | #undef TARGET_HAVE_SRODATA_SECTION | |
6760 | #define TARGET_HAVE_SRODATA_SECTION true | |
6761 | #undef TARGET_ASM_MERGEABLE_RODATA_PREFIX | |
6762 | #define TARGET_ASM_MERGEABLE_RODATA_PREFIX ".const" | |
6763 | ||
6764 | #undef TARGET_OPTION_OVERRIDE | |
6765 | #define TARGET_OPTION_OVERRIDE c6x_option_override | |
6766 | #undef TARGET_CONDITIONAL_REGISTER_USAGE | |
6767 | #define TARGET_CONDITIONAL_REGISTER_USAGE c6x_conditional_register_usage | |
6768 | ||
6769 | #undef TARGET_INIT_LIBFUNCS | |
6770 | #define TARGET_INIT_LIBFUNCS c6x_init_libfuncs | |
6771 | #undef TARGET_LIBFUNC_GNU_PREFIX | |
6772 | #define TARGET_LIBFUNC_GNU_PREFIX true | |
6773 | ||
6774 | #undef TARGET_SCALAR_MODE_SUPPORTED_P | |
6775 | #define TARGET_SCALAR_MODE_SUPPORTED_P c6x_scalar_mode_supported_p | |
6776 | #undef TARGET_VECTOR_MODE_SUPPORTED_P | |
6777 | #define TARGET_VECTOR_MODE_SUPPORTED_P c6x_vector_mode_supported_p | |
6778 | #undef TARGET_VECTORIZE_PREFERRED_SIMD_MODE | |
6779 | #define TARGET_VECTORIZE_PREFERRED_SIMD_MODE c6x_preferred_simd_mode | |
6780 | ||
6781 | #undef TARGET_RTX_COSTS | |
6782 | #define TARGET_RTX_COSTS c6x_rtx_costs | |
6783 | ||
6784 | #undef TARGET_SCHED_INIT | |
6785 | #define TARGET_SCHED_INIT c6x_sched_init | |
6786 | #undef TARGET_SCHED_SET_SCHED_FLAGS | |
6787 | #define TARGET_SCHED_SET_SCHED_FLAGS c6x_set_sched_flags | |
6788 | #undef TARGET_SCHED_ADJUST_COST | |
6789 | #define TARGET_SCHED_ADJUST_COST c6x_adjust_cost | |
6790 | #undef TARGET_SCHED_ISSUE_RATE | |
6791 | #define TARGET_SCHED_ISSUE_RATE c6x_issue_rate | |
6792 | #undef TARGET_SCHED_VARIABLE_ISSUE | |
6793 | #define TARGET_SCHED_VARIABLE_ISSUE c6x_variable_issue | |
6794 | #undef TARGET_SCHED_REORDER | |
6795 | #define TARGET_SCHED_REORDER c6x_sched_reorder | |
6796 | #undef TARGET_SCHED_REORDER2 | |
6797 | #define TARGET_SCHED_REORDER2 c6x_sched_reorder2 | |
87ded687 | 6798 | #undef TARGET_SCHED_DFA_NEW_CYCLE |
6799 | #define TARGET_SCHED_DFA_NEW_CYCLE c6x_dfa_new_cycle | |
6800 | #undef TARGET_SCHED_DFA_PRE_CYCLE_INSN | |
6801 | #define TARGET_SCHED_DFA_PRE_CYCLE_INSN c6x_sched_dfa_pre_cycle_insn | |
5aa04b01 | 6802 | #undef TARGET_SCHED_EXPOSED_PIPELINE |
6803 | #define TARGET_SCHED_EXPOSED_PIPELINE true | |
6804 | ||
6805 | #undef TARGET_SCHED_ALLOC_SCHED_CONTEXT | |
6806 | #define TARGET_SCHED_ALLOC_SCHED_CONTEXT c6x_alloc_sched_context | |
6807 | #undef TARGET_SCHED_INIT_SCHED_CONTEXT | |
6808 | #define TARGET_SCHED_INIT_SCHED_CONTEXT c6x_init_sched_context | |
6809 | #undef TARGET_SCHED_SET_SCHED_CONTEXT | |
6810 | #define TARGET_SCHED_SET_SCHED_CONTEXT c6x_set_sched_context | |
87ded687 | 6811 | #undef TARGET_SCHED_CLEAR_SCHED_CONTEXT |
6812 | #define TARGET_SCHED_CLEAR_SCHED_CONTEXT c6x_clear_sched_context | |
5aa04b01 | 6813 | #undef TARGET_SCHED_FREE_SCHED_CONTEXT |
6814 | #define TARGET_SCHED_FREE_SCHED_CONTEXT c6x_free_sched_context | |
6815 | ||
6816 | #undef TARGET_CAN_ELIMINATE | |
6817 | #define TARGET_CAN_ELIMINATE c6x_can_eliminate | |
6818 | ||
6819 | #undef TARGET_PREFERRED_RENAME_CLASS | |
6820 | #define TARGET_PREFERRED_RENAME_CLASS c6x_preferred_rename_class | |
6821 | ||
6822 | #undef TARGET_MACHINE_DEPENDENT_REORG | |
6823 | #define TARGET_MACHINE_DEPENDENT_REORG c6x_reorg | |
6824 | ||
6825 | #undef TARGET_ASM_FILE_START | |
6826 | #define TARGET_ASM_FILE_START c6x_file_start | |
6827 | ||
6828 | #undef TARGET_PRINT_OPERAND | |
6829 | #define TARGET_PRINT_OPERAND c6x_print_operand | |
6830 | #undef TARGET_PRINT_OPERAND_ADDRESS | |
6831 | #define TARGET_PRINT_OPERAND_ADDRESS c6x_print_operand_address | |
6832 | #undef TARGET_PRINT_OPERAND_PUNCT_VALID_P | |
6833 | #define TARGET_PRINT_OPERAND_PUNCT_VALID_P c6x_print_operand_punct_valid_p | |
6834 | ||
6835 | /* C6x unwinding tables use a different format for the typeinfo tables. */ | |
6836 | #undef TARGET_ASM_TTYPE | |
6837 | #define TARGET_ASM_TTYPE c6x_output_ttype | |
6838 | ||
7e5fc0c4 | 6839 | /* The C6x ABI follows the ARM EABI exception handling rules. */ |
6840 | #undef TARGET_ARM_EABI_UNWINDER | |
6841 | #define TARGET_ARM_EABI_UNWINDER true | |
6842 | ||
9936b574 | 6843 | #undef TARGET_ASM_EMIT_EXCEPT_PERSONALITY |
6844 | #define TARGET_ASM_EMIT_EXCEPT_PERSONALITY c6x_asm_emit_except_personality | |
6845 | ||
6846 | #undef TARGET_ASM_INIT_SECTIONS | |
6847 | #define TARGET_ASM_INIT_SECTIONS c6x_asm_init_sections | |
6848 | ||
7e5fc0c4 | 6849 | #undef TARGET_DEBUG_UNWIND_INFO |
6850 | #define TARGET_DEBUG_UNWIND_INFO c6x_debug_unwind_info | |
6851 | ||
5aa04b01 | 6852 | #undef TARGET_DWARF_REGISTER_SPAN |
6853 | #define TARGET_DWARF_REGISTER_SPAN c6x_dwarf_register_span | |
6854 | ||
6855 | #undef TARGET_INIT_BUILTINS | |
6856 | #define TARGET_INIT_BUILTINS c6x_init_builtins | |
6857 | #undef TARGET_EXPAND_BUILTIN | |
6858 | #define TARGET_EXPAND_BUILTIN c6x_expand_builtin | |
6859 | #undef TARGET_BUILTIN_DECL | |
6860 | #define TARGET_BUILTIN_DECL c6x_builtin_decl | |
6861 | ||
b395382f | 6862 | #undef TARGET_HARD_REGNO_MODE_OK |
6863 | #define TARGET_HARD_REGNO_MODE_OK c6x_hard_regno_mode_ok | |
5f6dcf1a | 6864 | #undef TARGET_MODES_TIEABLE_P |
6865 | #define TARGET_MODES_TIEABLE_P c6x_modes_tieable_p | |
b395382f | 6866 | |
5aa04b01 | 6867 | struct gcc_target targetm = TARGET_INITIALIZER; |
6868 | ||
6869 | #include "gt-c6x.h" |