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03984308 | 1 | /* Subroutines for insn-output.c for Tensilica's Xtensa architecture. |
dde8a3a4 | 2 | Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
da1f39e4 | 3 | Free Software Foundation, Inc. |
03984308 BW |
4 | Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
2f83c7d6 | 10 | Software Foundation; either version 3, or (at your option) any later |
03984308 BW |
11 | version. |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
03984308 BW |
21 | |
22 | #include "config.h" | |
23 | #include "system.h" | |
4977bab6 ZW |
24 | #include "coretypes.h" |
25 | #include "tm.h" | |
03984308 BW |
26 | #include "rtl.h" |
27 | #include "regs.h" | |
03984308 BW |
28 | #include "hard-reg-set.h" |
29 | #include "basic-block.h" | |
03984308 BW |
30 | #include "insn-config.h" |
31 | #include "conditions.h" | |
32 | #include "insn-flags.h" | |
33 | #include "insn-attr.h" | |
34 | #include "insn-codes.h" | |
35 | #include "recog.h" | |
36 | #include "output.h" | |
37 | #include "tree.h" | |
38 | #include "expr.h" | |
39 | #include "flags.h" | |
40 | #include "reload.h" | |
41 | #include "tm_p.h" | |
42 | #include "function.h" | |
718f9c0f | 43 | #include "diagnostic-core.h" |
03984308 BW |
44 | #include "optabs.h" |
45 | #include "libfuncs.h" | |
07232638 | 46 | #include "ggc.h" |
03984308 BW |
47 | #include "target.h" |
48 | #include "target-def.h" | |
540eaea8 | 49 | #include "langhooks.h" |
726a989a | 50 | #include "gimple.h" |
e70312d4 | 51 | #include "df.h" |
85d53c1d | 52 | |
03984308 BW |
53 | |
54 | /* Enumeration for all of the relational tests, so that we can build | |
55 | arrays indexed by the test type, and not worry about the order | |
638db43e | 56 | of EQ, NE, etc. */ |
03984308 | 57 | |
ffbc8796 BW |
58 | enum internal_test |
59 | { | |
60 | ITEST_EQ, | |
61 | ITEST_NE, | |
62 | ITEST_GT, | |
63 | ITEST_GE, | |
64 | ITEST_LT, | |
65 | ITEST_LE, | |
66 | ITEST_GTU, | |
67 | ITEST_GEU, | |
68 | ITEST_LTU, | |
69 | ITEST_LEU, | |
70 | ITEST_MAX | |
71 | }; | |
03984308 | 72 | |
03984308 BW |
73 | /* Array giving truth value on whether or not a given hard register |
74 | can support a given mode. */ | |
75 | char xtensa_hard_regno_mode_ok[(int) MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER]; | |
76 | ||
77 | /* Current frame size calculated by compute_frame_size. */ | |
78 | unsigned xtensa_current_frame_size; | |
79 | ||
a46bbb5a | 80 | /* Largest block move to handle in-line. */ |
03984308 BW |
81 | #define LARGEST_MOVE_RATIO 15 |
82 | ||
83 | /* Define the structure for the machine field in struct function. */ | |
d1b38208 | 84 | struct GTY(()) machine_function |
03984308 BW |
85 | { |
86 | int accesses_prev_frame; | |
997b8b4d BW |
87 | bool need_a7_copy; |
88 | bool vararg_a7; | |
0d8442b8 | 89 | rtx vararg_a7_copy; |
997b8b4d | 90 | rtx set_frame_ptr_insn; |
03984308 BW |
91 | }; |
92 | ||
93 | /* Vector, indexed by hard register number, which contains 1 for a | |
94 | register that is allowable in a candidate for leaf function | |
638db43e | 95 | treatment. */ |
03984308 BW |
96 | |
97 | const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER] = | |
98 | { | |
99 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
100 | 1, 1, 1, | |
101 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
102 | 1 | |
103 | }; | |
104 | ||
105 | /* Map hard register number to register class */ | |
106 | const enum reg_class xtensa_regno_to_class[FIRST_PSEUDO_REGISTER] = | |
107 | { | |
89f6025d BW |
108 | RL_REGS, SP_REG, RL_REGS, RL_REGS, |
109 | RL_REGS, RL_REGS, RL_REGS, GR_REGS, | |
110 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
111 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
03984308 BW |
112 | AR_REGS, AR_REGS, BR_REGS, |
113 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
114 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
115 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
116 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
117 | ACC_REG, | |
118 | }; | |
119 | ||
c5387660 | 120 | static void xtensa_option_override (void); |
ffbc8796 BW |
121 | static enum internal_test map_test_to_internal_test (enum rtx_code); |
122 | static rtx gen_int_relational (enum rtx_code, rtx, rtx, int *); | |
123 | static rtx gen_float_relational (enum rtx_code, rtx, rtx); | |
f90b7a5a | 124 | static rtx gen_conditional_move (enum rtx_code, enum machine_mode, rtx, rtx); |
ffbc8796 | 125 | static rtx fixup_subreg_mem (rtx); |
ffbc8796 | 126 | static struct machine_function * xtensa_init_machine_status (void); |
6a7a462c | 127 | static rtx xtensa_legitimize_tls_address (rtx); |
506d7b68 | 128 | static rtx xtensa_legitimize_address (rtx, rtx, enum machine_mode); |
a1a79768 | 129 | static bool xtensa_mode_dependent_address_p (const_rtx); |
586de218 | 130 | static bool xtensa_return_in_msb (const_tree); |
ffbc8796 BW |
131 | static void printx (FILE *, signed int); |
132 | static void xtensa_function_epilogue (FILE *, HOST_WIDE_INT); | |
4c45af42 | 133 | static rtx xtensa_builtin_saveregs (void); |
c6c3dba9 | 134 | static bool xtensa_legitimate_address_p (enum machine_mode, rtx, bool); |
ffbc8796 BW |
135 | static unsigned int xtensa_multibss_section_type_flags (tree, const char *, |
136 | int) ATTRIBUTE_UNUSED; | |
d6b5193b RS |
137 | static section *xtensa_select_rtx_section (enum machine_mode, rtx, |
138 | unsigned HOST_WIDE_INT); | |
f40751dd | 139 | static bool xtensa_rtx_costs (rtx, int, int, int *, bool); |
5378dda2 AS |
140 | static int xtensa_register_move_cost (enum machine_mode, reg_class_t, |
141 | reg_class_t); | |
142 | static int xtensa_memory_move_cost (enum machine_mode, reg_class_t, bool); | |
c35d187f | 143 | static tree xtensa_build_builtin_va_list (void); |
586de218 | 144 | static bool xtensa_return_in_memory (const_tree, const_tree); |
726a989a RB |
145 | static tree xtensa_gimplify_va_arg_expr (tree, tree, gimple_seq *, |
146 | gimple_seq *); | |
626a4b31 NF |
147 | static void xtensa_function_arg_advance (CUMULATIVE_ARGS *, enum machine_mode, |
148 | const_tree, bool); | |
149 | static rtx xtensa_function_arg (CUMULATIVE_ARGS *, enum machine_mode, | |
150 | const_tree, bool); | |
151 | static rtx xtensa_function_incoming_arg (CUMULATIVE_ARGS *, | |
152 | enum machine_mode, const_tree, bool); | |
e2b2d01e | 153 | static rtx xtensa_function_value (const_tree, const_tree, bool); |
dde8a3a4 AS |
154 | static rtx xtensa_libcall_value (enum machine_mode, const_rtx); |
155 | static bool xtensa_function_value_regno_p (const unsigned int); | |
c2ed6cf8 NF |
156 | static unsigned int xtensa_function_arg_boundary (enum machine_mode, |
157 | const_tree); | |
09fa8841 | 158 | static void xtensa_init_builtins (void); |
f311c3b4 | 159 | static tree xtensa_fold_builtin (tree, int, tree *, bool); |
09fa8841 | 160 | static rtx xtensa_expand_builtin (tree, rtx, rtx, enum machine_mode, int); |
9d0b1619 | 161 | static void xtensa_va_start (tree, rtx); |
b52b1749 | 162 | static bool xtensa_frame_pointer_required (void); |
2b4fa409 | 163 | static rtx xtensa_static_chain (const_tree, bool); |
3c1229cb RH |
164 | static void xtensa_asm_trampoline_template (FILE *); |
165 | static void xtensa_trampoline_init (rtx, tree, rtx); | |
2ac6bb04 | 166 | static bool xtensa_output_addr_const_extra (FILE *, rtx); |
fbbf66e7 | 167 | static bool xtensa_cannot_force_const_mem (enum machine_mode, rtx); |
b64a1b53 | 168 | |
a6e508f9 AS |
169 | static reg_class_t xtensa_preferred_reload_class (rtx, reg_class_t); |
170 | static reg_class_t xtensa_preferred_output_reload_class (rtx, reg_class_t); | |
171 | static reg_class_t xtensa_secondary_reload (bool, rtx, reg_class_t, | |
172 | enum machine_mode, | |
173 | struct secondary_reload_info *); | |
174 | ||
a1a79768 | 175 | static bool constantpool_address_p (const_rtx addr); |
1a627b35 | 176 | static bool xtensa_legitimate_constant_p (enum machine_mode, rtx); |
a1a79768 | 177 | |
b64a1b53 RH |
178 | static const int reg_nonleaf_alloc_order[FIRST_PSEUDO_REGISTER] = |
179 | REG_ALLOC_ORDER; | |
180 | \f | |
03984308 BW |
181 | |
182 | /* This macro generates the assembly code for function exit, | |
183 | on machines that need it. If FUNCTION_EPILOGUE is not defined | |
184 | then individual return instructions are generated for each | |
185 | return statement. Args are same as for FUNCTION_PROLOGUE. */ | |
186 | ||
187 | #undef TARGET_ASM_FUNCTION_EPILOGUE | |
188 | #define TARGET_ASM_FUNCTION_EPILOGUE xtensa_function_epilogue | |
189 | ||
190 | /* These hooks specify assembly directives for creating certain kinds | |
191 | of integer object. */ | |
192 | ||
193 | #undef TARGET_ASM_ALIGNED_SI_OP | |
194 | #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t" | |
195 | ||
b64a1b53 RH |
196 | #undef TARGET_ASM_SELECT_RTX_SECTION |
197 | #define TARGET_ASM_SELECT_RTX_SECTION xtensa_select_rtx_section | |
03984308 | 198 | |
506d7b68 PB |
199 | #undef TARGET_LEGITIMIZE_ADDRESS |
200 | #define TARGET_LEGITIMIZE_ADDRESS xtensa_legitimize_address | |
a1a79768 AS |
201 | #undef TARGET_MODE_DEPENDENT_ADDRESS_P |
202 | #define TARGET_MODE_DEPENDENT_ADDRESS_P xtensa_mode_dependent_address_p | |
506d7b68 | 203 | |
5378dda2 AS |
204 | #undef TARGET_REGISTER_MOVE_COST |
205 | #define TARGET_REGISTER_MOVE_COST xtensa_register_move_cost | |
206 | #undef TARGET_MEMORY_MOVE_COST | |
207 | #define TARGET_MEMORY_MOVE_COST xtensa_memory_move_cost | |
3c50106f RH |
208 | #undef TARGET_RTX_COSTS |
209 | #define TARGET_RTX_COSTS xtensa_rtx_costs | |
dcefdf67 | 210 | #undef TARGET_ADDRESS_COST |
f40751dd | 211 | #define TARGET_ADDRESS_COST hook_int_rtx_bool_0 |
3c50106f | 212 | |
c35d187f RH |
213 | #undef TARGET_BUILD_BUILTIN_VA_LIST |
214 | #define TARGET_BUILD_BUILTIN_VA_LIST xtensa_build_builtin_va_list | |
215 | ||
d7bd8aeb JJ |
216 | #undef TARGET_EXPAND_BUILTIN_VA_START |
217 | #define TARGET_EXPAND_BUILTIN_VA_START xtensa_va_start | |
218 | ||
cde0f3fd PB |
219 | #undef TARGET_PROMOTE_FUNCTION_MODE |
220 | #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote | |
4c45af42 | 221 | #undef TARGET_PROMOTE_PROTOTYPES |
586de218 | 222 | #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true |
4c45af42 | 223 | |
4c45af42 KH |
224 | #undef TARGET_RETURN_IN_MEMORY |
225 | #define TARGET_RETURN_IN_MEMORY xtensa_return_in_memory | |
e2b2d01e AS |
226 | #undef TARGET_FUNCTION_VALUE |
227 | #define TARGET_FUNCTION_VALUE xtensa_function_value | |
dde8a3a4 AS |
228 | #undef TARGET_LIBCALL_VALUE |
229 | #define TARGET_LIBCALL_VALUE xtensa_libcall_value | |
230 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
231 | #define TARGET_FUNCTION_VALUE_REGNO_P xtensa_function_value_regno_p | |
232 | ||
42ba5130 | 233 | #undef TARGET_SPLIT_COMPLEX_ARG |
3101faab | 234 | #define TARGET_SPLIT_COMPLEX_ARG hook_bool_const_tree_true |
fe984136 RH |
235 | #undef TARGET_MUST_PASS_IN_STACK |
236 | #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size | |
626a4b31 NF |
237 | #undef TARGET_FUNCTION_ARG_ADVANCE |
238 | #define TARGET_FUNCTION_ARG_ADVANCE xtensa_function_arg_advance | |
239 | #undef TARGET_FUNCTION_ARG | |
240 | #define TARGET_FUNCTION_ARG xtensa_function_arg | |
241 | #undef TARGET_FUNCTION_INCOMING_ARG | |
242 | #define TARGET_FUNCTION_INCOMING_ARG xtensa_function_incoming_arg | |
c2ed6cf8 NF |
243 | #undef TARGET_FUNCTION_ARG_BOUNDARY |
244 | #define TARGET_FUNCTION_ARG_BOUNDARY xtensa_function_arg_boundary | |
4c45af42 KH |
245 | |
246 | #undef TARGET_EXPAND_BUILTIN_SAVEREGS | |
247 | #define TARGET_EXPAND_BUILTIN_SAVEREGS xtensa_builtin_saveregs | |
85d53c1d RH |
248 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
249 | #define TARGET_GIMPLIFY_VA_ARG_EXPR xtensa_gimplify_va_arg_expr | |
4c45af42 | 250 | |
6e5ff6e7 BW |
251 | #undef TARGET_RETURN_IN_MSB |
252 | #define TARGET_RETURN_IN_MSB xtensa_return_in_msb | |
253 | ||
09fa8841 BW |
254 | #undef TARGET_INIT_BUILTINS |
255 | #define TARGET_INIT_BUILTINS xtensa_init_builtins | |
256 | #undef TARGET_FOLD_BUILTIN | |
257 | #define TARGET_FOLD_BUILTIN xtensa_fold_builtin | |
258 | #undef TARGET_EXPAND_BUILTIN | |
259 | #define TARGET_EXPAND_BUILTIN xtensa_expand_builtin | |
260 | ||
a6e508f9 AS |
261 | #undef TARGET_PREFERRED_RELOAD_CLASS |
262 | #define TARGET_PREFERRED_RELOAD_CLASS xtensa_preferred_reload_class | |
263 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
264 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS xtensa_preferred_output_reload_class | |
265 | ||
37fbe8a3 BW |
266 | #undef TARGET_SECONDARY_RELOAD |
267 | #define TARGET_SECONDARY_RELOAD xtensa_secondary_reload | |
268 | ||
6a7a462c BW |
269 | #undef TARGET_HAVE_TLS |
270 | #define TARGET_HAVE_TLS (TARGET_THREADPTR && HAVE_AS_TLS) | |
271 | ||
272 | #undef TARGET_CANNOT_FORCE_CONST_MEM | |
fbbf66e7 | 273 | #define TARGET_CANNOT_FORCE_CONST_MEM xtensa_cannot_force_const_mem |
6a7a462c | 274 | |
c6c3dba9 PB |
275 | #undef TARGET_LEGITIMATE_ADDRESS_P |
276 | #define TARGET_LEGITIMATE_ADDRESS_P xtensa_legitimate_address_p | |
277 | ||
b52b1749 AS |
278 | #undef TARGET_FRAME_POINTER_REQUIRED |
279 | #define TARGET_FRAME_POINTER_REQUIRED xtensa_frame_pointer_required | |
280 | ||
2b4fa409 RH |
281 | #undef TARGET_STATIC_CHAIN |
282 | #define TARGET_STATIC_CHAIN xtensa_static_chain | |
3c1229cb RH |
283 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
284 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE xtensa_asm_trampoline_template | |
285 | #undef TARGET_TRAMPOLINE_INIT | |
286 | #define TARGET_TRAMPOLINE_INIT xtensa_trampoline_init | |
287 | ||
c5387660 JM |
288 | #undef TARGET_OPTION_OVERRIDE |
289 | #define TARGET_OPTION_OVERRIDE xtensa_option_override | |
290 | ||
2ac6bb04 AS |
291 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
292 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA xtensa_output_addr_const_extra | |
293 | ||
1a627b35 RS |
294 | #undef TARGET_LEGITIMATE_CONSTANT_P |
295 | #define TARGET_LEGITIMATE_CONSTANT_P xtensa_legitimate_constant_p | |
296 | ||
b64a1b53 | 297 | struct gcc_target targetm = TARGET_INITIALIZER; |
03984308 | 298 | |
887af464 BW |
299 | \f |
300 | /* Functions to test Xtensa immediate operand validity. */ | |
03984308 | 301 | |
8eb1bc5c BW |
302 | bool |
303 | xtensa_simm8 (HOST_WIDE_INT v) | |
304 | { | |
305 | return v >= -128 && v <= 127; | |
306 | } | |
307 | ||
308 | ||
309 | bool | |
310 | xtensa_simm8x256 (HOST_WIDE_INT v) | |
311 | { | |
312 | return (v & 255) == 0 && (v >= -32768 && v <= 32512); | |
313 | } | |
314 | ||
315 | ||
316 | bool | |
317 | xtensa_simm12b (HOST_WIDE_INT v) | |
318 | { | |
319 | return v >= -2048 && v <= 2047; | |
320 | } | |
321 | ||
322 | ||
323 | static bool | |
324 | xtensa_uimm8 (HOST_WIDE_INT v) | |
325 | { | |
326 | return v >= 0 && v <= 255; | |
327 | } | |
328 | ||
329 | ||
330 | static bool | |
331 | xtensa_uimm8x2 (HOST_WIDE_INT v) | |
332 | { | |
333 | return (v & 1) == 0 && (v >= 0 && v <= 510); | |
334 | } | |
335 | ||
336 | ||
337 | static bool | |
338 | xtensa_uimm8x4 (HOST_WIDE_INT v) | |
339 | { | |
340 | return (v & 3) == 0 && (v >= 0 && v <= 1020); | |
341 | } | |
342 | ||
343 | ||
344 | static bool | |
345 | xtensa_b4const (HOST_WIDE_INT v) | |
03984308 BW |
346 | { |
347 | switch (v) | |
348 | { | |
8eb1bc5c BW |
349 | case -1: |
350 | case 1: | |
03984308 BW |
351 | case 2: |
352 | case 3: | |
353 | case 4: | |
354 | case 5: | |
355 | case 6: | |
356 | case 7: | |
357 | case 8: | |
358 | case 10: | |
359 | case 12: | |
360 | case 16: | |
361 | case 32: | |
362 | case 64: | |
363 | case 128: | |
364 | case 256: | |
8eb1bc5c | 365 | return true; |
03984308 | 366 | } |
8eb1bc5c | 367 | return false; |
03984308 BW |
368 | } |
369 | ||
03984308 | 370 | |
8eb1bc5c BW |
371 | bool |
372 | xtensa_b4const_or_zero (HOST_WIDE_INT v) | |
03984308 | 373 | { |
8eb1bc5c BW |
374 | if (v == 0) |
375 | return true; | |
376 | return xtensa_b4const (v); | |
03984308 BW |
377 | } |
378 | ||
03984308 | 379 | |
8eb1bc5c BW |
380 | bool |
381 | xtensa_b4constu (HOST_WIDE_INT v) | |
03984308 BW |
382 | { |
383 | switch (v) | |
384 | { | |
8eb1bc5c BW |
385 | case 32768: |
386 | case 65536: | |
03984308 BW |
387 | case 2: |
388 | case 3: | |
389 | case 4: | |
390 | case 5: | |
391 | case 6: | |
392 | case 7: | |
393 | case 8: | |
394 | case 10: | |
395 | case 12: | |
396 | case 16: | |
397 | case 32: | |
398 | case 64: | |
399 | case 128: | |
400 | case 256: | |
8eb1bc5c | 401 | return true; |
03984308 | 402 | } |
8eb1bc5c | 403 | return false; |
03984308 BW |
404 | } |
405 | ||
03984308 | 406 | |
8eb1bc5c BW |
407 | bool |
408 | xtensa_mask_immediate (HOST_WIDE_INT v) | |
03984308 | 409 | { |
8eb1bc5c BW |
410 | #define MAX_MASK_SIZE 16 |
411 | int mask_size; | |
03984308 | 412 | |
8eb1bc5c BW |
413 | for (mask_size = 1; mask_size <= MAX_MASK_SIZE; mask_size++) |
414 | { | |
415 | if ((v & 1) == 0) | |
416 | return false; | |
417 | v = v >> 1; | |
418 | if (v == 0) | |
419 | return true; | |
420 | } | |
03984308 | 421 | |
8eb1bc5c | 422 | return false; |
03984308 BW |
423 | } |
424 | ||
03984308 | 425 | |
03984308 | 426 | /* This is just like the standard true_regnum() function except that it |
638db43e | 427 | works even when reg_renumber is not initialized. */ |
03984308 BW |
428 | |
429 | int | |
ffbc8796 | 430 | xt_true_regnum (rtx x) |
03984308 BW |
431 | { |
432 | if (GET_CODE (x) == REG) | |
433 | { | |
434 | if (reg_renumber | |
435 | && REGNO (x) >= FIRST_PSEUDO_REGISTER | |
436 | && reg_renumber[REGNO (x)] >= 0) | |
437 | return reg_renumber[REGNO (x)]; | |
438 | return REGNO (x); | |
439 | } | |
440 | if (GET_CODE (x) == SUBREG) | |
441 | { | |
442 | int base = xt_true_regnum (SUBREG_REG (x)); | |
443 | if (base >= 0 && base < FIRST_PSEUDO_REGISTER) | |
444 | return base + subreg_regno_offset (REGNO (SUBREG_REG (x)), | |
445 | GET_MODE (SUBREG_REG (x)), | |
446 | SUBREG_BYTE (x), GET_MODE (x)); | |
447 | } | |
448 | return -1; | |
449 | } | |
450 | ||
451 | ||
03984308 | 452 | int |
ffbc8796 | 453 | xtensa_valid_move (enum machine_mode mode, rtx *operands) |
03984308 | 454 | { |
a8cacfd2 BW |
455 | /* Either the destination or source must be a register, and the |
456 | MAC16 accumulator doesn't count. */ | |
457 | ||
458 | if (register_operand (operands[0], mode)) | |
459 | { | |
460 | int dst_regnum = xt_true_regnum (operands[0]); | |
461 | ||
638db43e | 462 | /* The stack pointer can only be assigned with a MOVSP opcode. */ |
a8cacfd2 BW |
463 | if (dst_regnum == STACK_POINTER_REGNUM) |
464 | return (mode == SImode | |
465 | && register_operand (operands[1], mode) | |
466 | && !ACC_REG_P (xt_true_regnum (operands[1]))); | |
467 | ||
468 | if (!ACC_REG_P (dst_regnum)) | |
469 | return true; | |
470 | } | |
3437320b | 471 | if (register_operand (operands[1], mode)) |
a8cacfd2 BW |
472 | { |
473 | int src_regnum = xt_true_regnum (operands[1]); | |
474 | if (!ACC_REG_P (src_regnum)) | |
475 | return true; | |
476 | } | |
03984308 BW |
477 | return FALSE; |
478 | } | |
479 | ||
480 | ||
03984308 | 481 | int |
ffbc8796 | 482 | smalloffset_mem_p (rtx op) |
03984308 BW |
483 | { |
484 | if (GET_CODE (op) == MEM) | |
485 | { | |
486 | rtx addr = XEXP (op, 0); | |
487 | if (GET_CODE (addr) == REG) | |
da1f39e4 | 488 | return BASE_REG_P (addr, 0); |
03984308 BW |
489 | if (GET_CODE (addr) == PLUS) |
490 | { | |
491 | rtx offset = XEXP (addr, 0); | |
8eb1bc5c | 492 | HOST_WIDE_INT val; |
03984308 BW |
493 | if (GET_CODE (offset) != CONST_INT) |
494 | offset = XEXP (addr, 1); | |
495 | if (GET_CODE (offset) != CONST_INT) | |
496 | return FALSE; | |
8eb1bc5c BW |
497 | |
498 | val = INTVAL (offset); | |
499 | return (val & 3) == 0 && (val >= 0 && val <= 60); | |
03984308 BW |
500 | } |
501 | } | |
502 | return FALSE; | |
503 | } | |
504 | ||
505 | ||
a1a79768 AS |
506 | static bool |
507 | constantpool_address_p (const_rtx addr) | |
03984308 | 508 | { |
a1a79768 | 509 | const_rtx sym = addr; |
03984308 BW |
510 | |
511 | if (GET_CODE (addr) == CONST) | |
512 | { | |
513 | rtx offset; | |
514 | ||
3bbc2af6 | 515 | /* Only handle (PLUS (SYM, OFFSET)) form. */ |
03984308 BW |
516 | addr = XEXP (addr, 0); |
517 | if (GET_CODE (addr) != PLUS) | |
a1a79768 | 518 | return false; |
03984308 | 519 | |
3bbc2af6 | 520 | /* Make sure the address is word aligned. */ |
03984308 | 521 | offset = XEXP (addr, 1); |
a1a79768 | 522 | if ((!CONST_INT_P (offset)) |
03984308 | 523 | || ((INTVAL (offset) & 3) != 0)) |
a1a79768 | 524 | return false; |
03984308 BW |
525 | |
526 | sym = XEXP (addr, 0); | |
527 | } | |
528 | ||
529 | if ((GET_CODE (sym) == SYMBOL_REF) | |
530 | && CONSTANT_POOL_ADDRESS_P (sym)) | |
a1a79768 AS |
531 | return true; |
532 | return false; | |
03984308 BW |
533 | } |
534 | ||
535 | ||
536 | int | |
ffbc8796 | 537 | constantpool_mem_p (rtx op) |
03984308 | 538 | { |
63694bdd BW |
539 | if (GET_CODE (op) == SUBREG) |
540 | op = SUBREG_REG (op); | |
03984308 BW |
541 | if (GET_CODE (op) == MEM) |
542 | return constantpool_address_p (XEXP (op, 0)); | |
543 | return FALSE; | |
544 | } | |
545 | ||
546 | ||
6a7a462c BW |
547 | /* Return TRUE if X is a thread-local symbol. */ |
548 | ||
549 | static bool | |
550 | xtensa_tls_symbol_p (rtx x) | |
551 | { | |
552 | if (! TARGET_HAVE_TLS) | |
553 | return false; | |
554 | ||
555 | return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0; | |
556 | } | |
557 | ||
558 | ||
03984308 | 559 | void |
ffbc8796 | 560 | xtensa_extend_reg (rtx dst, rtx src) |
03984308 BW |
561 | { |
562 | rtx temp = gen_reg_rtx (SImode); | |
563 | rtx shift = GEN_INT (BITS_PER_WORD - GET_MODE_BITSIZE (GET_MODE (src))); | |
564 | ||
3bbc2af6 | 565 | /* Generate paradoxical subregs as needed so that the modes match. */ |
03984308 BW |
566 | src = simplify_gen_subreg (SImode, src, GET_MODE (src), 0); |
567 | dst = simplify_gen_subreg (SImode, dst, GET_MODE (dst), 0); | |
568 | ||
569 | emit_insn (gen_ashlsi3 (temp, src, shift)); | |
570 | emit_insn (gen_ashrsi3 (dst, temp, shift)); | |
571 | } | |
572 | ||
573 | ||
8eb1bc5c | 574 | bool |
ffbc8796 | 575 | xtensa_mem_offset (unsigned v, enum machine_mode mode) |
03984308 BW |
576 | { |
577 | switch (mode) | |
578 | { | |
579 | case BLKmode: | |
580 | /* Handle the worst case for block moves. See xtensa_expand_block_move | |
581 | where we emit an optimized block move operation if the block can be | |
582 | moved in < "move_ratio" pieces. The worst case is when the block is | |
583 | aligned but has a size of (3 mod 4) (does this happen?) so that the | |
638db43e | 584 | last piece requires a byte load/store. */ |
f42f5a1b BW |
585 | return (xtensa_uimm8 (v) |
586 | && xtensa_uimm8 (v + MOVE_MAX * LARGEST_MOVE_RATIO)); | |
03984308 BW |
587 | |
588 | case QImode: | |
589 | return xtensa_uimm8 (v); | |
590 | ||
591 | case HImode: | |
592 | return xtensa_uimm8x2 (v); | |
593 | ||
594 | case DFmode: | |
595 | return (xtensa_uimm8x4 (v) && xtensa_uimm8x4 (v + 4)); | |
596 | ||
597 | default: | |
598 | break; | |
599 | } | |
600 | ||
601 | return xtensa_uimm8x4 (v); | |
602 | } | |
603 | ||
604 | ||
ffbc8796 | 605 | /* Make normal rtx_code into something we can index from an array. */ |
03984308 BW |
606 | |
607 | static enum internal_test | |
ffbc8796 | 608 | map_test_to_internal_test (enum rtx_code test_code) |
03984308 BW |
609 | { |
610 | enum internal_test test = ITEST_MAX; | |
611 | ||
612 | switch (test_code) | |
613 | { | |
614 | default: break; | |
615 | case EQ: test = ITEST_EQ; break; | |
616 | case NE: test = ITEST_NE; break; | |
617 | case GT: test = ITEST_GT; break; | |
618 | case GE: test = ITEST_GE; break; | |
619 | case LT: test = ITEST_LT; break; | |
620 | case LE: test = ITEST_LE; break; | |
621 | case GTU: test = ITEST_GTU; break; | |
622 | case GEU: test = ITEST_GEU; break; | |
623 | case LTU: test = ITEST_LTU; break; | |
624 | case LEU: test = ITEST_LEU; break; | |
625 | } | |
626 | ||
627 | return test; | |
628 | } | |
629 | ||
630 | ||
631 | /* Generate the code to compare two integer values. The return value is | |
638db43e | 632 | the comparison expression. */ |
03984308 BW |
633 | |
634 | static rtx | |
ffbc8796 BW |
635 | gen_int_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
636 | rtx cmp0, /* first operand to compare */ | |
637 | rtx cmp1, /* second operand to compare */ | |
638 | int *p_invert /* whether branch needs to reverse test */) | |
03984308 | 639 | { |
ffbc8796 BW |
640 | struct cmp_info |
641 | { | |
03984308 | 642 | enum rtx_code test_code; /* test code to use in insn */ |
8eb1bc5c | 643 | bool (*const_range_p) (HOST_WIDE_INT); /* range check function */ |
03984308 BW |
644 | int const_add; /* constant to add (convert LE -> LT) */ |
645 | int reverse_regs; /* reverse registers in test */ | |
646 | int invert_const; /* != 0 if invert value if cmp1 is constant */ | |
647 | int invert_reg; /* != 0 if invert value if cmp1 is register */ | |
648 | int unsignedp; /* != 0 for unsigned comparisons. */ | |
649 | }; | |
650 | ||
651 | static struct cmp_info info[ (int)ITEST_MAX ] = { | |
652 | ||
8eb1bc5c BW |
653 | { EQ, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* EQ */ |
654 | { NE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* NE */ | |
03984308 | 655 | |
8eb1bc5c BW |
656 | { LT, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* GT */ |
657 | { GE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* GE */ | |
658 | { LT, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* LT */ | |
659 | { GE, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* LE */ | |
03984308 BW |
660 | |
661 | { LTU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* GTU */ | |
662 | { GEU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* GEU */ | |
663 | { LTU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* LTU */ | |
664 | { GEU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* LEU */ | |
665 | }; | |
666 | ||
667 | enum internal_test test; | |
668 | enum machine_mode mode; | |
669 | struct cmp_info *p_info; | |
670 | ||
671 | test = map_test_to_internal_test (test_code); | |
177b6be0 | 672 | gcc_assert (test != ITEST_MAX); |
03984308 BW |
673 | |
674 | p_info = &info[ (int)test ]; | |
675 | ||
676 | mode = GET_MODE (cmp0); | |
677 | if (mode == VOIDmode) | |
678 | mode = GET_MODE (cmp1); | |
679 | ||
680 | /* Make sure we can handle any constants given to us. */ | |
681 | if (GET_CODE (cmp1) == CONST_INT) | |
682 | { | |
683 | HOST_WIDE_INT value = INTVAL (cmp1); | |
684 | unsigned HOST_WIDE_INT uvalue = (unsigned HOST_WIDE_INT)value; | |
685 | ||
686 | /* if the immediate overflows or does not fit in the immediate field, | |
687 | spill it to a register */ | |
688 | ||
689 | if ((p_info->unsignedp ? | |
690 | (uvalue + p_info->const_add > uvalue) : | |
691 | (value + p_info->const_add > value)) != (p_info->const_add > 0)) | |
692 | { | |
693 | cmp1 = force_reg (mode, cmp1); | |
694 | } | |
695 | else if (!(p_info->const_range_p) (value + p_info->const_add)) | |
696 | { | |
697 | cmp1 = force_reg (mode, cmp1); | |
698 | } | |
699 | } | |
700 | else if ((GET_CODE (cmp1) != REG) && (GET_CODE (cmp1) != SUBREG)) | |
701 | { | |
702 | cmp1 = force_reg (mode, cmp1); | |
703 | } | |
704 | ||
705 | /* See if we need to invert the result. */ | |
706 | *p_invert = ((GET_CODE (cmp1) == CONST_INT) | |
707 | ? p_info->invert_const | |
708 | : p_info->invert_reg); | |
709 | ||
710 | /* Comparison to constants, may involve adding 1 to change a LT into LE. | |
711 | Comparison between two registers, may involve switching operands. */ | |
712 | if (GET_CODE (cmp1) == CONST_INT) | |
713 | { | |
714 | if (p_info->const_add != 0) | |
715 | cmp1 = GEN_INT (INTVAL (cmp1) + p_info->const_add); | |
716 | ||
717 | } | |
718 | else if (p_info->reverse_regs) | |
719 | { | |
720 | rtx temp = cmp0; | |
721 | cmp0 = cmp1; | |
722 | cmp1 = temp; | |
723 | } | |
724 | ||
1c563bed | 725 | return gen_rtx_fmt_ee (p_info->test_code, VOIDmode, cmp0, cmp1); |
03984308 BW |
726 | } |
727 | ||
728 | ||
729 | /* Generate the code to compare two float values. The return value is | |
638db43e | 730 | the comparison expression. */ |
03984308 BW |
731 | |
732 | static rtx | |
ffbc8796 BW |
733 | gen_float_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
734 | rtx cmp0, /* first operand to compare */ | |
735 | rtx cmp1 /* second operand to compare */) | |
03984308 | 736 | { |
ffbc8796 | 737 | rtx (*gen_fn) (rtx, rtx, rtx); |
03984308 BW |
738 | rtx brtmp; |
739 | int reverse_regs, invert; | |
740 | ||
741 | switch (test_code) | |
742 | { | |
743 | case EQ: reverse_regs = 0; invert = 0; gen_fn = gen_seq_sf; break; | |
744 | case NE: reverse_regs = 0; invert = 1; gen_fn = gen_seq_sf; break; | |
745 | case LE: reverse_regs = 0; invert = 0; gen_fn = gen_sle_sf; break; | |
746 | case GT: reverse_regs = 1; invert = 0; gen_fn = gen_slt_sf; break; | |
747 | case LT: reverse_regs = 0; invert = 0; gen_fn = gen_slt_sf; break; | |
748 | case GE: reverse_regs = 1; invert = 0; gen_fn = gen_sle_sf; break; | |
ff779f98 BW |
749 | case UNEQ: reverse_regs = 0; invert = 0; gen_fn = gen_suneq_sf; break; |
750 | case LTGT: reverse_regs = 0; invert = 1; gen_fn = gen_suneq_sf; break; | |
751 | case UNLE: reverse_regs = 0; invert = 0; gen_fn = gen_sunle_sf; break; | |
752 | case UNGT: reverse_regs = 1; invert = 0; gen_fn = gen_sunlt_sf; break; | |
753 | case UNLT: reverse_regs = 0; invert = 0; gen_fn = gen_sunlt_sf; break; | |
754 | case UNGE: reverse_regs = 1; invert = 0; gen_fn = gen_sunle_sf; break; | |
755 | case UNORDERED: | |
756 | reverse_regs = 0; invert = 0; gen_fn = gen_sunordered_sf; break; | |
757 | case ORDERED: | |
758 | reverse_regs = 0; invert = 1; gen_fn = gen_sunordered_sf; break; | |
633e4eb4 | 759 | default: |
1c563bed | 760 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 BW |
761 | reverse_regs = 0; invert = 0; gen_fn = 0; /* avoid compiler warnings */ |
762 | } | |
763 | ||
764 | if (reverse_regs) | |
765 | { | |
766 | rtx temp = cmp0; | |
767 | cmp0 = cmp1; | |
768 | cmp1 = temp; | |
769 | } | |
770 | ||
771 | brtmp = gen_rtx_REG (CCmode, FPCC_REGNUM); | |
772 | emit_insn (gen_fn (brtmp, cmp0, cmp1)); | |
773 | ||
1c563bed | 774 | return gen_rtx_fmt_ee (invert ? EQ : NE, VOIDmode, brtmp, const0_rtx); |
03984308 BW |
775 | } |
776 | ||
777 | ||
778 | void | |
f90b7a5a | 779 | xtensa_expand_conditional_branch (rtx *operands, enum machine_mode mode) |
03984308 | 780 | { |
f90b7a5a PB |
781 | enum rtx_code test_code = GET_CODE (operands[0]); |
782 | rtx cmp0 = operands[1]; | |
783 | rtx cmp1 = operands[2]; | |
03984308 BW |
784 | rtx cmp; |
785 | int invert; | |
786 | rtx label1, label2; | |
787 | ||
f90b7a5a | 788 | switch (mode) |
03984308 | 789 | { |
f90b7a5a | 790 | case DFmode: |
03984308 | 791 | default: |
1c563bed | 792 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 | 793 | |
f90b7a5a | 794 | case SImode: |
03984308 BW |
795 | invert = FALSE; |
796 | cmp = gen_int_relational (test_code, cmp0, cmp1, &invert); | |
797 | break; | |
798 | ||
f90b7a5a | 799 | case SFmode: |
03984308 | 800 | if (!TARGET_HARD_FLOAT) |
da1f39e4 BW |
801 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, |
802 | cmp0, cmp1)); | |
03984308 BW |
803 | invert = FALSE; |
804 | cmp = gen_float_relational (test_code, cmp0, cmp1); | |
805 | break; | |
806 | } | |
807 | ||
808 | /* Generate the branch. */ | |
809 | ||
f90b7a5a | 810 | label1 = gen_rtx_LABEL_REF (VOIDmode, operands[3]); |
03984308 BW |
811 | label2 = pc_rtx; |
812 | ||
813 | if (invert) | |
814 | { | |
815 | label2 = label1; | |
816 | label1 = pc_rtx; | |
817 | } | |
818 | ||
819 | emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx, | |
820 | gen_rtx_IF_THEN_ELSE (VOIDmode, cmp, | |
821 | label1, | |
822 | label2))); | |
823 | } | |
824 | ||
825 | ||
826 | static rtx | |
f90b7a5a PB |
827 | gen_conditional_move (enum rtx_code code, enum machine_mode mode, |
828 | rtx op0, rtx op1) | |
03984308 | 829 | { |
f90b7a5a | 830 | if (mode == SImode) |
03984308 | 831 | { |
f90b7a5a PB |
832 | rtx cmp; |
833 | ||
03984308 BW |
834 | /* Jump optimization calls get_condition() which canonicalizes |
835 | comparisons like (GE x <const>) to (GT x <const-1>). | |
836 | Transform those comparisons back to GE, since that is the | |
837 | comparison supported in Xtensa. We shouldn't have to | |
838 | transform <LE x const> comparisons, because neither | |
839 | xtensa_expand_conditional_branch() nor get_condition() will | |
638db43e | 840 | produce them. */ |
03984308 BW |
841 | |
842 | if ((code == GT) && (op1 == constm1_rtx)) | |
843 | { | |
844 | code = GE; | |
845 | op1 = const0_rtx; | |
846 | } | |
1c563bed | 847 | cmp = gen_rtx_fmt_ee (code, VOIDmode, cc0_rtx, const0_rtx); |
03984308 BW |
848 | |
849 | if (boolean_operator (cmp, VOIDmode)) | |
850 | { | |
3bbc2af6 | 851 | /* Swap the operands to make const0 second. */ |
03984308 BW |
852 | if (op0 == const0_rtx) |
853 | { | |
854 | op0 = op1; | |
855 | op1 = const0_rtx; | |
856 | } | |
857 | ||
3bbc2af6 | 858 | /* If not comparing against zero, emit a comparison (subtract). */ |
03984308 BW |
859 | if (op1 != const0_rtx) |
860 | { | |
861 | op0 = expand_binop (SImode, sub_optab, op0, op1, | |
862 | 0, 0, OPTAB_LIB_WIDEN); | |
863 | op1 = const0_rtx; | |
864 | } | |
865 | } | |
866 | else if (branch_operator (cmp, VOIDmode)) | |
867 | { | |
3bbc2af6 | 868 | /* Swap the operands to make const0 second. */ |
03984308 BW |
869 | if (op0 == const0_rtx) |
870 | { | |
871 | op0 = op1; | |
872 | op1 = const0_rtx; | |
873 | ||
874 | switch (code) | |
875 | { | |
876 | case LT: code = GE; break; | |
877 | case GE: code = LT; break; | |
177b6be0 | 878 | default: gcc_unreachable (); |
03984308 BW |
879 | } |
880 | } | |
881 | ||
882 | if (op1 != const0_rtx) | |
883 | return 0; | |
884 | } | |
885 | else | |
886 | return 0; | |
887 | ||
1c563bed | 888 | return gen_rtx_fmt_ee (code, VOIDmode, op0, op1); |
03984308 BW |
889 | } |
890 | ||
f90b7a5a | 891 | if (TARGET_HARD_FLOAT && mode == SFmode) |
03984308 BW |
892 | return gen_float_relational (code, op0, op1); |
893 | ||
894 | return 0; | |
895 | } | |
896 | ||
897 | ||
898 | int | |
ffbc8796 | 899 | xtensa_expand_conditional_move (rtx *operands, int isflt) |
03984308 | 900 | { |
f90b7a5a PB |
901 | rtx dest = operands[0]; |
902 | rtx cmp = operands[1]; | |
903 | enum machine_mode cmp_mode = GET_MODE (XEXP (cmp, 0)); | |
ffbc8796 | 904 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 905 | |
f90b7a5a PB |
906 | if (!(cmp = gen_conditional_move (GET_CODE (cmp), cmp_mode, |
907 | XEXP (cmp, 0), XEXP (cmp, 1)))) | |
03984308 BW |
908 | return 0; |
909 | ||
910 | if (isflt) | |
f90b7a5a | 911 | gen_fn = (cmp_mode == SImode |
03984308 BW |
912 | ? gen_movsfcc_internal0 |
913 | : gen_movsfcc_internal1); | |
914 | else | |
f90b7a5a | 915 | gen_fn = (cmp_mode == SImode |
03984308 BW |
916 | ? gen_movsicc_internal0 |
917 | : gen_movsicc_internal1); | |
918 | ||
f90b7a5a | 919 | emit_insn (gen_fn (dest, XEXP (cmp, 0), operands[2], operands[3], cmp)); |
03984308 BW |
920 | return 1; |
921 | } | |
922 | ||
923 | ||
924 | int | |
f90b7a5a | 925 | xtensa_expand_scc (rtx operands[4], enum machine_mode cmp_mode) |
03984308 BW |
926 | { |
927 | rtx dest = operands[0]; | |
f90b7a5a | 928 | rtx cmp; |
03984308 | 929 | rtx one_tmp, zero_tmp; |
ffbc8796 | 930 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 931 | |
f90b7a5a PB |
932 | if (!(cmp = gen_conditional_move (GET_CODE (operands[1]), cmp_mode, |
933 | operands[2], operands[3]))) | |
03984308 BW |
934 | return 0; |
935 | ||
936 | one_tmp = gen_reg_rtx (SImode); | |
937 | zero_tmp = gen_reg_rtx (SImode); | |
938 | emit_insn (gen_movsi (one_tmp, const_true_rtx)); | |
939 | emit_insn (gen_movsi (zero_tmp, const0_rtx)); | |
940 | ||
f90b7a5a | 941 | gen_fn = (cmp_mode == SImode |
03984308 BW |
942 | ? gen_movsicc_internal0 |
943 | : gen_movsicc_internal1); | |
944 | emit_insn (gen_fn (dest, XEXP (cmp, 0), one_tmp, zero_tmp, cmp)); | |
945 | return 1; | |
946 | } | |
947 | ||
948 | ||
633e4eb4 BW |
949 | /* Split OP[1] into OP[2,3] and likewise for OP[0] into OP[0,1]. MODE is |
950 | for the output, i.e., the input operands are twice as big as MODE. */ | |
951 | ||
952 | void | |
ffbc8796 | 953 | xtensa_split_operand_pair (rtx operands[4], enum machine_mode mode) |
633e4eb4 BW |
954 | { |
955 | switch (GET_CODE (operands[1])) | |
956 | { | |
957 | case REG: | |
958 | operands[3] = gen_rtx_REG (mode, REGNO (operands[1]) + 1); | |
959 | operands[2] = gen_rtx_REG (mode, REGNO (operands[1])); | |
960 | break; | |
961 | ||
962 | case MEM: | |
963 | operands[3] = adjust_address (operands[1], mode, GET_MODE_SIZE (mode)); | |
964 | operands[2] = adjust_address (operands[1], mode, 0); | |
965 | break; | |
966 | ||
967 | case CONST_INT: | |
968 | case CONST_DOUBLE: | |
969 | split_double (operands[1], &operands[2], &operands[3]); | |
970 | break; | |
971 | ||
972 | default: | |
177b6be0 | 973 | gcc_unreachable (); |
633e4eb4 BW |
974 | } |
975 | ||
976 | switch (GET_CODE (operands[0])) | |
977 | { | |
978 | case REG: | |
979 | operands[1] = gen_rtx_REG (mode, REGNO (operands[0]) + 1); | |
980 | operands[0] = gen_rtx_REG (mode, REGNO (operands[0])); | |
981 | break; | |
982 | ||
983 | case MEM: | |
984 | operands[1] = adjust_address (operands[0], mode, GET_MODE_SIZE (mode)); | |
985 | operands[0] = adjust_address (operands[0], mode, 0); | |
986 | break; | |
987 | ||
988 | default: | |
177b6be0 | 989 | gcc_unreachable (); |
633e4eb4 BW |
990 | } |
991 | } | |
992 | ||
993 | ||
03984308 | 994 | /* Emit insns to move operands[1] into operands[0]. |
03984308 BW |
995 | Return 1 if we have written out everything that needs to be done to |
996 | do the move. Otherwise, return 0 and the caller will emit the move | |
997 | normally. */ | |
998 | ||
999 | int | |
ffbc8796 | 1000 | xtensa_emit_move_sequence (rtx *operands, enum machine_mode mode) |
03984308 | 1001 | { |
6a7a462c BW |
1002 | rtx src = operands[1]; |
1003 | ||
1004 | if (CONSTANT_P (src) | |
1005 | && (GET_CODE (src) != CONST_INT || ! xtensa_simm12b (INTVAL (src)))) | |
03984308 | 1006 | { |
6a7a462c BW |
1007 | rtx dst = operands[0]; |
1008 | ||
1009 | if (xtensa_tls_referenced_p (src)) | |
1010 | { | |
1011 | rtx addend = NULL; | |
1012 | ||
1013 | if (GET_CODE (src) == CONST && GET_CODE (XEXP (src, 0)) == PLUS) | |
1014 | { | |
1015 | addend = XEXP (XEXP (src, 0), 1); | |
1016 | src = XEXP (XEXP (src, 0), 0); | |
1017 | } | |
1018 | ||
1019 | src = xtensa_legitimize_tls_address (src); | |
1020 | if (addend) | |
1021 | { | |
1022 | src = gen_rtx_PLUS (mode, src, addend); | |
1023 | src = force_operand (src, dst); | |
1024 | } | |
1025 | emit_move_insn (dst, src); | |
1026 | return 1; | |
1027 | } | |
1028 | ||
1029 | if (! TARGET_CONST16) | |
1030 | { | |
1031 | src = force_const_mem (SImode, src); | |
1032 | operands[1] = src; | |
1033 | } | |
f42f5a1b BW |
1034 | |
1035 | /* PC-relative loads are always SImode, and CONST16 is only | |
1036 | supported in the movsi pattern, so add a SUBREG for any other | |
1037 | (smaller) mode. */ | |
1038 | ||
1039 | if (mode != SImode) | |
1040 | { | |
6a7a462c | 1041 | if (register_operand (dst, mode)) |
f42f5a1b | 1042 | { |
6a7a462c | 1043 | emit_move_insn (simplify_gen_subreg (SImode, dst, mode, 0), src); |
f42f5a1b BW |
1044 | return 1; |
1045 | } | |
1046 | else | |
1047 | { | |
6a7a462c BW |
1048 | src = force_reg (SImode, src); |
1049 | src = gen_lowpart_SUBREG (mode, src); | |
1050 | operands[1] = src; | |
f42f5a1b BW |
1051 | } |
1052 | } | |
03984308 BW |
1053 | } |
1054 | ||
997b8b4d BW |
1055 | if (!(reload_in_progress | reload_completed) |
1056 | && !xtensa_valid_move (mode, operands)) | |
1057 | operands[1] = force_reg (mode, operands[1]); | |
03984308 | 1058 | |
997b8b4d | 1059 | operands[1] = xtensa_copy_incoming_a7 (operands[1]); |
03984308 BW |
1060 | |
1061 | /* During reload we don't want to emit (subreg:X (mem:Y)) since that | |
638db43e BW |
1062 | instruction won't be recognized after reload, so we remove the |
1063 | subreg and adjust mem accordingly. */ | |
03984308 BW |
1064 | if (reload_in_progress) |
1065 | { | |
1066 | operands[0] = fixup_subreg_mem (operands[0]); | |
1067 | operands[1] = fixup_subreg_mem (operands[1]); | |
1068 | } | |
1069 | return 0; | |
1070 | } | |
1071 | ||
f42f5a1b | 1072 | |
03984308 | 1073 | static rtx |
ffbc8796 | 1074 | fixup_subreg_mem (rtx x) |
03984308 BW |
1075 | { |
1076 | if (GET_CODE (x) == SUBREG | |
1077 | && GET_CODE (SUBREG_REG (x)) == REG | |
1078 | && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER) | |
1079 | { | |
1080 | rtx temp = | |
1081 | gen_rtx_SUBREG (GET_MODE (x), | |
f2034d06 | 1082 | reg_equiv_mem (REGNO (SUBREG_REG (x))), |
03984308 BW |
1083 | SUBREG_BYTE (x)); |
1084 | x = alter_subreg (&temp); | |
1085 | } | |
1086 | return x; | |
1087 | } | |
1088 | ||
1089 | ||
997b8b4d BW |
1090 | /* Check if an incoming argument in a7 is expected to be used soon and |
1091 | if OPND is a register or register pair that includes a7. If so, | |
1092 | create a new pseudo and copy a7 into that pseudo at the very | |
1093 | beginning of the function, followed by the special "set_frame_ptr" | |
1094 | unspec_volatile insn. The return value is either the original | |
1095 | operand, if it is not a7, or the new pseudo containing a copy of | |
1096 | the incoming argument. This is necessary because the register | |
1097 | allocator will ignore conflicts with a7 and may either assign some | |
1098 | other pseudo to a7 or use a7 as the hard_frame_pointer, clobbering | |
1099 | the incoming argument in a7. By copying the argument out of a7 as | |
1100 | the very first thing, and then immediately following that with an | |
1101 | unspec_volatile to keep the scheduler away, we should avoid any | |
1102 | problems. Putting the set_frame_ptr insn at the beginning, with | |
1103 | only the a7 copy before it, also makes it easier for the prologue | |
1104 | expander to initialize the frame pointer after the a7 copy and to | |
1105 | fix up the a7 copy to use the stack pointer instead of the frame | |
1106 | pointer. */ | |
58db834b | 1107 | |
997b8b4d BW |
1108 | rtx |
1109 | xtensa_copy_incoming_a7 (rtx opnd) | |
58db834b | 1110 | { |
997b8b4d BW |
1111 | rtx entry_insns = 0; |
1112 | rtx reg, tmp; | |
1113 | enum machine_mode mode; | |
1114 | ||
1115 | if (!cfun->machine->need_a7_copy) | |
1116 | return opnd; | |
1117 | ||
1118 | /* This function should never be called again once a7 has been copied. */ | |
177b6be0 | 1119 | gcc_assert (!cfun->machine->set_frame_ptr_insn); |
997b8b4d BW |
1120 | |
1121 | mode = GET_MODE (opnd); | |
1122 | ||
1123 | /* The operand using a7 may come in a later instruction, so just return | |
1124 | the original operand if it doesn't use a7. */ | |
1125 | reg = opnd; | |
1126 | if (GET_CODE (reg) == SUBREG) | |
58db834b | 1127 | { |
177b6be0 | 1128 | gcc_assert (SUBREG_BYTE (reg) == 0); |
997b8b4d BW |
1129 | reg = SUBREG_REG (reg); |
1130 | } | |
1131 | if (GET_CODE (reg) != REG | |
1132 | || REGNO (reg) > A7_REG | |
1133 | || REGNO (reg) + HARD_REGNO_NREGS (A7_REG, mode) <= A7_REG) | |
1134 | return opnd; | |
e6aecf8e | 1135 | |
997b8b4d | 1136 | /* 1-word args will always be in a7; 2-word args in a6/a7. */ |
177b6be0 | 1137 | gcc_assert (REGNO (reg) + HARD_REGNO_NREGS (A7_REG, mode) - 1 == A7_REG); |
58db834b | 1138 | |
997b8b4d | 1139 | cfun->machine->need_a7_copy = false; |
58db834b | 1140 | |
997b8b4d BW |
1141 | /* Copy a7 to a new pseudo at the function entry. Use gen_raw_REG to |
1142 | create the REG for a7 so that hard_frame_pointer_rtx is not used. */ | |
58db834b | 1143 | |
0d8442b8 | 1144 | start_sequence (); |
997b8b4d | 1145 | tmp = gen_reg_rtx (mode); |
58db834b | 1146 | |
997b8b4d BW |
1147 | switch (mode) |
1148 | { | |
1149 | case DFmode: | |
1150 | case DImode: | |
b412869c BW |
1151 | /* Copy the value out of A7 here but keep the first word in A6 until |
1152 | after the set_frame_ptr insn. Otherwise, the register allocator | |
1153 | may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming | |
1154 | value. */ | |
997b8b4d BW |
1155 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), |
1156 | gen_raw_REG (SImode, A7_REG))); | |
1157 | break; | |
1158 | case SFmode: | |
1159 | emit_insn (gen_movsf_internal (tmp, gen_raw_REG (mode, A7_REG))); | |
1160 | break; | |
1161 | case SImode: | |
1162 | emit_insn (gen_movsi_internal (tmp, gen_raw_REG (mode, A7_REG))); | |
1163 | break; | |
1164 | case HImode: | |
1165 | emit_insn (gen_movhi_internal (tmp, gen_raw_REG (mode, A7_REG))); | |
1166 | break; | |
1167 | case QImode: | |
1168 | emit_insn (gen_movqi_internal (tmp, gen_raw_REG (mode, A7_REG))); | |
1169 | break; | |
1170 | default: | |
177b6be0 | 1171 | gcc_unreachable (); |
58db834b BW |
1172 | } |
1173 | ||
997b8b4d | 1174 | cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); |
b412869c BW |
1175 | |
1176 | /* For DF and DI mode arguments, copy the incoming value in A6 now. */ | |
1177 | if (mode == DFmode || mode == DImode) | |
1178 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), | |
1179 | gen_rtx_REG (SImode, A7_REG - 1))); | |
997b8b4d BW |
1180 | entry_insns = get_insns (); |
1181 | end_sequence (); | |
1182 | ||
1183 | if (cfun->machine->vararg_a7) | |
1184 | { | |
0d8442b8 BW |
1185 | /* This is called from within builtin_saveregs, which will insert the |
1186 | saveregs code at the function entry, ahead of anything placed at | |
1187 | the function entry now. Instead, save the sequence to be inserted | |
1188 | at the beginning of the saveregs code. */ | |
1189 | cfun->machine->vararg_a7_copy = entry_insns; | |
997b8b4d BW |
1190 | } |
1191 | else | |
1192 | { | |
1193 | /* Put entry_insns after the NOTE that starts the function. If | |
1194 | this is inside a start_sequence, make the outer-level insn | |
1195 | chain current, so the code is placed at the start of the | |
1196 | function. */ | |
1197 | push_topmost_sequence (); | |
0d8442b8 BW |
1198 | /* Do not use entry_of_function() here. This is called from within |
1199 | expand_function_start, when the CFG still holds GIMPLE. */ | |
997b8b4d BW |
1200 | emit_insn_after (entry_insns, get_insns ()); |
1201 | pop_topmost_sequence (); | |
1202 | } | |
1203 | ||
1204 | return tmp; | |
58db834b BW |
1205 | } |
1206 | ||
1207 | ||
a46bbb5a BW |
1208 | /* Try to expand a block move operation to a sequence of RTL move |
1209 | instructions. If not optimizing, or if the block size is not a | |
1210 | constant, or if the block is too large, the expansion fails and GCC | |
1211 | falls back to calling memcpy(). | |
03984308 BW |
1212 | |
1213 | operands[0] is the destination | |
1214 | operands[1] is the source | |
1215 | operands[2] is the length | |
1216 | operands[3] is the alignment */ | |
1217 | ||
1218 | int | |
ffbc8796 | 1219 | xtensa_expand_block_move (rtx *operands) |
03984308 | 1220 | { |
7eda7cda RH |
1221 | static const enum machine_mode mode_from_align[] = |
1222 | { | |
1223 | VOIDmode, QImode, HImode, VOIDmode, SImode, | |
1224 | }; | |
1225 | ||
1226 | rtx dst_mem = operands[0]; | |
1227 | rtx src_mem = operands[1]; | |
1228 | HOST_WIDE_INT bytes, align; | |
03984308 | 1229 | int num_pieces, move_ratio; |
7eda7cda RH |
1230 | rtx temp[2]; |
1231 | enum machine_mode mode[2]; | |
1232 | int amount[2]; | |
1233 | bool active[2]; | |
1234 | int phase = 0; | |
1235 | int next; | |
1236 | int offset_ld = 0; | |
1237 | int offset_st = 0; | |
1238 | rtx x; | |
03984308 | 1239 | |
3bbc2af6 | 1240 | /* If this is not a fixed size move, just call memcpy. */ |
03984308 BW |
1241 | if (!optimize || (GET_CODE (operands[2]) != CONST_INT)) |
1242 | return 0; | |
1243 | ||
7eda7cda RH |
1244 | bytes = INTVAL (operands[2]); |
1245 | align = INTVAL (operands[3]); | |
1246 | ||
3bbc2af6 | 1247 | /* Anything to move? */ |
03984308 | 1248 | if (bytes <= 0) |
7eda7cda | 1249 | return 0; |
03984308 BW |
1250 | |
1251 | if (align > MOVE_MAX) | |
1252 | align = MOVE_MAX; | |
1253 | ||
3bbc2af6 | 1254 | /* Decide whether to expand inline based on the optimization level. */ |
03984308 BW |
1255 | move_ratio = 4; |
1256 | if (optimize > 2) | |
1257 | move_ratio = LARGEST_MOVE_RATIO; | |
3bbc2af6 | 1258 | num_pieces = (bytes / align) + (bytes % align); /* Close enough anyway. */ |
7eda7cda | 1259 | if (num_pieces > move_ratio) |
03984308 BW |
1260 | return 0; |
1261 | ||
7eda7cda RH |
1262 | x = XEXP (dst_mem, 0); |
1263 | if (!REG_P (x)) | |
1264 | { | |
1265 | x = force_reg (Pmode, x); | |
1266 | dst_mem = replace_equiv_address (dst_mem, x); | |
1267 | } | |
03984308 | 1268 | |
7eda7cda RH |
1269 | x = XEXP (src_mem, 0); |
1270 | if (!REG_P (x)) | |
1271 | { | |
1272 | x = force_reg (Pmode, x); | |
1273 | src_mem = replace_equiv_address (src_mem, x); | |
1274 | } | |
03984308 | 1275 | |
7eda7cda | 1276 | active[0] = active[1] = false; |
03984308 | 1277 | |
7eda7cda | 1278 | do |
03984308 | 1279 | { |
7eda7cda RH |
1280 | next = phase; |
1281 | phase ^= 1; | |
03984308 | 1282 | |
7eda7cda | 1283 | if (bytes > 0) |
03984308 | 1284 | { |
7eda7cda | 1285 | int next_amount; |
03984308 | 1286 | |
7eda7cda RH |
1287 | next_amount = (bytes >= 4 ? 4 : (bytes >= 2 ? 2 : 1)); |
1288 | next_amount = MIN (next_amount, align); | |
03984308 | 1289 | |
7eda7cda RH |
1290 | amount[next] = next_amount; |
1291 | mode[next] = mode_from_align[next_amount]; | |
1292 | temp[next] = gen_reg_rtx (mode[next]); | |
03984308 | 1293 | |
7eda7cda RH |
1294 | x = adjust_address (src_mem, mode[next], offset_ld); |
1295 | emit_insn (gen_rtx_SET (VOIDmode, temp[next], x)); | |
03984308 | 1296 | |
7eda7cda RH |
1297 | offset_ld += next_amount; |
1298 | bytes -= next_amount; | |
1299 | active[next] = true; | |
1300 | } | |
03984308 | 1301 | |
7eda7cda RH |
1302 | if (active[phase]) |
1303 | { | |
1304 | active[phase] = false; | |
1305 | ||
1306 | x = adjust_address (dst_mem, mode[phase], offset_st); | |
1307 | emit_insn (gen_rtx_SET (VOIDmode, x, temp[phase])); | |
03984308 | 1308 | |
7eda7cda RH |
1309 | offset_st += amount[phase]; |
1310 | } | |
03984308 | 1311 | } |
7eda7cda | 1312 | while (active[next]); |
03984308 | 1313 | |
7eda7cda | 1314 | return 1; |
03984308 BW |
1315 | } |
1316 | ||
1317 | ||
1318 | void | |
ffbc8796 | 1319 | xtensa_expand_nonlocal_goto (rtx *operands) |
03984308 BW |
1320 | { |
1321 | rtx goto_handler = operands[1]; | |
1322 | rtx containing_fp = operands[3]; | |
1323 | ||
3bbc2af6 KH |
1324 | /* Generate a call to "__xtensa_nonlocal_goto" (in libgcc); the code |
1325 | is too big to generate in-line. */ | |
03984308 BW |
1326 | |
1327 | if (GET_CODE (containing_fp) != REG) | |
1328 | containing_fp = force_reg (Pmode, containing_fp); | |
1329 | ||
03984308 | 1330 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_nonlocal_goto"), |
046845de | 1331 | LCT_NORMAL, VOIDmode, 2, |
03984308 BW |
1332 | containing_fp, Pmode, |
1333 | goto_handler, Pmode); | |
1334 | } | |
1335 | ||
1336 | ||
e2500fed | 1337 | static struct machine_function * |
ffbc8796 | 1338 | xtensa_init_machine_status (void) |
03984308 | 1339 | { |
a9429e29 | 1340 | return ggc_alloc_cleared_machine_function (); |
03984308 BW |
1341 | } |
1342 | ||
1343 | ||
2a48b790 BW |
1344 | /* Shift VAL of mode MODE left by COUNT bits. */ |
1345 | ||
1346 | static inline rtx | |
1347 | xtensa_expand_mask_and_shift (rtx val, enum machine_mode mode, rtx count) | |
1348 | { | |
1349 | val = expand_simple_binop (SImode, AND, val, GEN_INT (GET_MODE_MASK (mode)), | |
1350 | NULL_RTX, 1, OPTAB_DIRECT); | |
1351 | return expand_simple_binop (SImode, ASHIFT, val, count, | |
1352 | NULL_RTX, 1, OPTAB_DIRECT); | |
1353 | } | |
1354 | ||
1355 | ||
1356 | /* Structure to hold the initial parameters for a compare_and_swap operation | |
1357 | in HImode and QImode. */ | |
1358 | ||
1359 | struct alignment_context | |
1360 | { | |
1361 | rtx memsi; /* SI aligned memory location. */ | |
1362 | rtx shift; /* Bit offset with regard to lsb. */ | |
1363 | rtx modemask; /* Mask of the HQImode shifted by SHIFT bits. */ | |
1364 | rtx modemaski; /* ~modemask */ | |
1365 | }; | |
1366 | ||
1367 | ||
1368 | /* Initialize structure AC for word access to HI and QI mode memory. */ | |
1369 | ||
1370 | static void | |
1371 | init_alignment_context (struct alignment_context *ac, rtx mem) | |
1372 | { | |
1373 | enum machine_mode mode = GET_MODE (mem); | |
1374 | rtx byteoffset = NULL_RTX; | |
1375 | bool aligned = (MEM_ALIGN (mem) >= GET_MODE_BITSIZE (SImode)); | |
1376 | ||
1377 | if (aligned) | |
1378 | ac->memsi = adjust_address (mem, SImode, 0); /* Memory is aligned. */ | |
1379 | else | |
1380 | { | |
1381 | /* Alignment is unknown. */ | |
1382 | rtx addr, align; | |
1383 | ||
1384 | /* Force the address into a register. */ | |
1385 | addr = force_reg (Pmode, XEXP (mem, 0)); | |
1386 | ||
1387 | /* Align it to SImode. */ | |
1388 | align = expand_simple_binop (Pmode, AND, addr, | |
1389 | GEN_INT (-GET_MODE_SIZE (SImode)), | |
1390 | NULL_RTX, 1, OPTAB_DIRECT); | |
1391 | /* Generate MEM. */ | |
1392 | ac->memsi = gen_rtx_MEM (SImode, align); | |
1393 | MEM_VOLATILE_P (ac->memsi) = MEM_VOLATILE_P (mem); | |
1394 | set_mem_alias_set (ac->memsi, ALIAS_SET_MEMORY_BARRIER); | |
1395 | set_mem_align (ac->memsi, GET_MODE_BITSIZE (SImode)); | |
1396 | ||
1397 | byteoffset = expand_simple_binop (Pmode, AND, addr, | |
1398 | GEN_INT (GET_MODE_SIZE (SImode) - 1), | |
1399 | NULL_RTX, 1, OPTAB_DIRECT); | |
1400 | } | |
1401 | ||
1402 | /* Calculate shiftcount. */ | |
1403 | if (TARGET_BIG_ENDIAN) | |
1404 | { | |
1405 | ac->shift = GEN_INT (GET_MODE_SIZE (SImode) - GET_MODE_SIZE (mode)); | |
1406 | if (!aligned) | |
1407 | ac->shift = expand_simple_binop (SImode, MINUS, ac->shift, byteoffset, | |
1408 | NULL_RTX, 1, OPTAB_DIRECT); | |
1409 | } | |
1410 | else | |
1411 | { | |
1412 | if (aligned) | |
1413 | ac->shift = NULL_RTX; | |
1414 | else | |
1415 | ac->shift = byteoffset; | |
1416 | } | |
1417 | ||
1418 | if (ac->shift != NULL_RTX) | |
1419 | { | |
1420 | /* Shift is the byte count, but we need the bitcount. */ | |
1421 | ac->shift = expand_simple_binop (SImode, MULT, ac->shift, | |
1422 | GEN_INT (BITS_PER_UNIT), | |
1423 | NULL_RTX, 1, OPTAB_DIRECT); | |
1424 | ac->modemask = expand_simple_binop (SImode, ASHIFT, | |
1425 | GEN_INT (GET_MODE_MASK (mode)), | |
1426 | ac->shift, | |
1427 | NULL_RTX, 1, OPTAB_DIRECT); | |
1428 | } | |
1429 | else | |
1430 | ac->modemask = GEN_INT (GET_MODE_MASK (mode)); | |
1431 | ||
1432 | ac->modemaski = expand_simple_unop (SImode, NOT, ac->modemask, NULL_RTX, 1); | |
1433 | } | |
1434 | ||
1435 | ||
1436 | /* Expand an atomic compare and swap operation for HImode and QImode. | |
1437 | MEM is the memory location, CMP the old value to compare MEM with | |
0a2aaacc | 1438 | and NEW_RTX the value to set if CMP == MEM. */ |
2a48b790 BW |
1439 | |
1440 | void | |
0a2aaacc | 1441 | xtensa_expand_compare_and_swap (rtx target, rtx mem, rtx cmp, rtx new_rtx) |
2a48b790 BW |
1442 | { |
1443 | enum machine_mode mode = GET_MODE (mem); | |
1444 | struct alignment_context ac; | |
1445 | rtx tmp, cmpv, newv, val; | |
1446 | rtx oldval = gen_reg_rtx (SImode); | |
1447 | rtx res = gen_reg_rtx (SImode); | |
1448 | rtx csloop = gen_label_rtx (); | |
1449 | rtx csend = gen_label_rtx (); | |
1450 | ||
1451 | init_alignment_context (&ac, mem); | |
1452 | ||
1453 | if (ac.shift != NULL_RTX) | |
1454 | { | |
1455 | cmp = xtensa_expand_mask_and_shift (cmp, mode, ac.shift); | |
0a2aaacc | 1456 | new_rtx = xtensa_expand_mask_and_shift (new_rtx, mode, ac.shift); |
2a48b790 BW |
1457 | } |
1458 | ||
1459 | /* Load the surrounding word into VAL with the MEM value masked out. */ | |
1460 | val = force_reg (SImode, expand_simple_binop (SImode, AND, ac.memsi, | |
1461 | ac.modemaski, NULL_RTX, 1, | |
1462 | OPTAB_DIRECT)); | |
1463 | emit_label (csloop); | |
1464 | ||
0a2aaacc | 1465 | /* Patch CMP and NEW_RTX into VAL at correct position. */ |
2a48b790 BW |
1466 | cmpv = force_reg (SImode, expand_simple_binop (SImode, IOR, cmp, val, |
1467 | NULL_RTX, 1, OPTAB_DIRECT)); | |
0a2aaacc | 1468 | newv = force_reg (SImode, expand_simple_binop (SImode, IOR, new_rtx, val, |
2a48b790 BW |
1469 | NULL_RTX, 1, OPTAB_DIRECT)); |
1470 | ||
1471 | /* Jump to end if we're done. */ | |
1472 | emit_insn (gen_sync_compare_and_swapsi (res, ac.memsi, cmpv, newv)); | |
1473 | emit_cmp_and_jump_insns (res, cmpv, EQ, const0_rtx, SImode, true, csend); | |
1474 | ||
1475 | /* Check for changes outside mode. */ | |
1476 | emit_move_insn (oldval, val); | |
1477 | tmp = expand_simple_binop (SImode, AND, res, ac.modemaski, | |
1478 | val, 1, OPTAB_DIRECT); | |
1479 | if (tmp != val) | |
1480 | emit_move_insn (val, tmp); | |
1481 | ||
1482 | /* Loop internal if so. */ | |
1483 | emit_cmp_and_jump_insns (oldval, val, NE, const0_rtx, SImode, true, csloop); | |
1484 | ||
1485 | emit_label (csend); | |
1486 | ||
1487 | /* Return the correct part of the bitfield. */ | |
1488 | convert_move (target, | |
1489 | (ac.shift == NULL_RTX ? res | |
1490 | : expand_simple_binop (SImode, LSHIFTRT, res, ac.shift, | |
1491 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1492 | 1); | |
1493 | } | |
1494 | ||
1495 | ||
1496 | /* Expand an atomic operation CODE of mode MODE (either HImode or QImode -- | |
1497 | the default expansion works fine for SImode). MEM is the memory location | |
1498 | and VAL the value to play with. If AFTER is true then store the value | |
1499 | MEM holds after the operation, if AFTER is false then store the value MEM | |
1500 | holds before the operation. If TARGET is zero then discard that value, else | |
1501 | store it to TARGET. */ | |
1502 | ||
1503 | void | |
1504 | xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val, | |
1505 | bool after) | |
1506 | { | |
1507 | enum machine_mode mode = GET_MODE (mem); | |
1508 | struct alignment_context ac; | |
1509 | rtx csloop = gen_label_rtx (); | |
1510 | rtx cmp, tmp; | |
1511 | rtx old = gen_reg_rtx (SImode); | |
0a2aaacc | 1512 | rtx new_rtx = gen_reg_rtx (SImode); |
2a48b790 BW |
1513 | rtx orig = NULL_RTX; |
1514 | ||
1515 | init_alignment_context (&ac, mem); | |
1516 | ||
1517 | /* Prepare values before the compare-and-swap loop. */ | |
1518 | if (ac.shift != NULL_RTX) | |
1519 | val = xtensa_expand_mask_and_shift (val, mode, ac.shift); | |
1520 | switch (code) | |
1521 | { | |
1522 | case PLUS: | |
1523 | case MINUS: | |
1524 | orig = gen_reg_rtx (SImode); | |
1525 | convert_move (orig, val, 1); | |
1526 | break; | |
1527 | ||
1528 | case SET: | |
1529 | case IOR: | |
1530 | case XOR: | |
1531 | break; | |
1532 | ||
1533 | case MULT: /* NAND */ | |
1534 | case AND: | |
1535 | /* val = "11..1<val>11..1" */ | |
1536 | val = expand_simple_binop (SImode, XOR, val, ac.modemaski, | |
1537 | NULL_RTX, 1, OPTAB_DIRECT); | |
1538 | break; | |
1539 | ||
1540 | default: | |
1541 | gcc_unreachable (); | |
1542 | } | |
1543 | ||
1544 | /* Load full word. Subsequent loads are performed by S32C1I. */ | |
1545 | cmp = force_reg (SImode, ac.memsi); | |
1546 | ||
1547 | emit_label (csloop); | |
1548 | emit_move_insn (old, cmp); | |
1549 | ||
1550 | switch (code) | |
1551 | { | |
1552 | case PLUS: | |
1553 | case MINUS: | |
1554 | val = expand_simple_binop (SImode, code, old, orig, | |
1555 | NULL_RTX, 1, OPTAB_DIRECT); | |
1556 | val = expand_simple_binop (SImode, AND, val, ac.modemask, | |
1557 | NULL_RTX, 1, OPTAB_DIRECT); | |
1558 | /* FALLTHRU */ | |
1559 | case SET: | |
1560 | tmp = expand_simple_binop (SImode, AND, old, ac.modemaski, | |
1561 | NULL_RTX, 1, OPTAB_DIRECT); | |
1562 | tmp = expand_simple_binop (SImode, IOR, tmp, val, | |
0a2aaacc | 1563 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1564 | break; |
1565 | ||
1566 | case AND: | |
1567 | case IOR: | |
1568 | case XOR: | |
1569 | tmp = expand_simple_binop (SImode, code, old, val, | |
0a2aaacc | 1570 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1571 | break; |
1572 | ||
1573 | case MULT: /* NAND */ | |
1574 | tmp = expand_simple_binop (SImode, XOR, old, ac.modemask, | |
1575 | NULL_RTX, 1, OPTAB_DIRECT); | |
1576 | tmp = expand_simple_binop (SImode, AND, tmp, val, | |
0a2aaacc | 1577 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1578 | break; |
1579 | ||
1580 | default: | |
1581 | gcc_unreachable (); | |
1582 | } | |
1583 | ||
0a2aaacc KG |
1584 | if (tmp != new_rtx) |
1585 | emit_move_insn (new_rtx, tmp); | |
1586 | emit_insn (gen_sync_compare_and_swapsi (cmp, ac.memsi, old, new_rtx)); | |
2a48b790 BW |
1587 | emit_cmp_and_jump_insns (cmp, old, NE, const0_rtx, SImode, true, csloop); |
1588 | ||
1589 | if (target) | |
1590 | { | |
0a2aaacc | 1591 | tmp = (after ? new_rtx : cmp); |
2a48b790 BW |
1592 | convert_move (target, |
1593 | (ac.shift == NULL_RTX ? tmp | |
1594 | : expand_simple_binop (SImode, LSHIFTRT, tmp, ac.shift, | |
1595 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1596 | 1); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | ||
03984308 | 1601 | void |
ffbc8796 | 1602 | xtensa_setup_frame_addresses (void) |
03984308 | 1603 | { |
b52b1749 | 1604 | /* Set flag to cause TARGET_FRAME_POINTER_REQUIRED to return true. */ |
03984308 BW |
1605 | cfun->machine->accesses_prev_frame = 1; |
1606 | ||
1607 | emit_library_call | |
1608 | (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_libgcc_window_spill"), | |
046845de | 1609 | LCT_NORMAL, VOIDmode, 0); |
03984308 BW |
1610 | } |
1611 | ||
1612 | ||
638db43e BW |
1613 | /* Emit the assembly for the end of a zero-cost loop. Normally we just emit |
1614 | a comment showing where the end of the loop is. However, if there is a | |
03984308 | 1615 | label or a branch at the end of the loop then we need to place a nop |
638db43e | 1616 | there. If the loop ends with a label we need the nop so that branches |
839a4992 KH |
1617 | targeting that label will target the nop (and thus remain in the loop), |
1618 | instead of targeting the instruction after the loop (and thus exiting | |
638db43e | 1619 | the loop). If the loop ends with a branch, we need the nop in case the |
839a4992 | 1620 | branch is targeting a location inside the loop. When the branch |
03984308 BW |
1621 | executes it will cause the loop count to be decremented even if it is |
1622 | taken (because it is the last instruction in the loop), so we need to | |
1623 | nop after the branch to prevent the loop count from being decremented | |
638db43e | 1624 | when the branch is taken. */ |
03984308 BW |
1625 | |
1626 | void | |
ffbc8796 | 1627 | xtensa_emit_loop_end (rtx insn, rtx *operands) |
03984308 BW |
1628 | { |
1629 | char done = 0; | |
1630 | ||
1631 | for (insn = PREV_INSN (insn); insn && !done; insn = PREV_INSN (insn)) | |
1632 | { | |
1633 | switch (GET_CODE (insn)) | |
1634 | { | |
1635 | case NOTE: | |
1636 | case BARRIER: | |
1637 | break; | |
1638 | ||
1639 | case CODE_LABEL: | |
0bd0703d | 1640 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1641 | done = 1; |
1642 | break; | |
1643 | ||
1644 | default: | |
1645 | { | |
1646 | rtx body = PATTERN (insn); | |
1647 | ||
1648 | if (GET_CODE (body) == JUMP_INSN) | |
1649 | { | |
0bd0703d | 1650 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1651 | done = 1; |
1652 | } | |
1653 | else if ((GET_CODE (body) != USE) | |
1654 | && (GET_CODE (body) != CLOBBER)) | |
1655 | done = 1; | |
1656 | } | |
1657 | break; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | output_asm_insn ("# loop end for %0", operands); | |
1662 | } | |
1663 | ||
1664 | ||
036a2b7a BW |
1665 | char * |
1666 | xtensa_emit_branch (bool inverted, bool immed, rtx *operands) | |
1667 | { | |
1668 | static char result[64]; | |
1669 | enum rtx_code code; | |
1670 | const char *op; | |
1671 | ||
1672 | code = GET_CODE (operands[3]); | |
1673 | switch (code) | |
1674 | { | |
1675 | case EQ: op = inverted ? "ne" : "eq"; break; | |
1676 | case NE: op = inverted ? "eq" : "ne"; break; | |
1677 | case LT: op = inverted ? "ge" : "lt"; break; | |
1678 | case GE: op = inverted ? "lt" : "ge"; break; | |
1679 | case LTU: op = inverted ? "geu" : "ltu"; break; | |
1680 | case GEU: op = inverted ? "ltu" : "geu"; break; | |
1681 | default: gcc_unreachable (); | |
1682 | } | |
1683 | ||
1684 | if (immed) | |
1685 | { | |
1686 | if (INTVAL (operands[1]) == 0) | |
1687 | sprintf (result, "b%sz%s\t%%0, %%2", op, | |
1688 | (TARGET_DENSITY && (code == EQ || code == NE)) ? ".n" : ""); | |
1689 | else | |
1690 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1691 | } | |
1692 | else | |
1693 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1694 | ||
1695 | return result; | |
1696 | } | |
1697 | ||
1698 | ||
1699 | char * | |
1700 | xtensa_emit_bit_branch (bool inverted, bool immed, rtx *operands) | |
1701 | { | |
1702 | static char result[64]; | |
1703 | const char *op; | |
1704 | ||
1705 | switch (GET_CODE (operands[3])) | |
1706 | { | |
1707 | case EQ: op = inverted ? "bs" : "bc"; break; | |
1708 | case NE: op = inverted ? "bc" : "bs"; break; | |
1709 | default: gcc_unreachable (); | |
1710 | } | |
1711 | ||
1712 | if (immed) | |
1713 | { | |
1714 | unsigned bitnum = INTVAL (operands[1]) & 0x1f; | |
1715 | operands[1] = GEN_INT (bitnum); | |
1716 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1717 | } | |
1718 | else | |
1719 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1720 | ||
1721 | return result; | |
1722 | } | |
1723 | ||
1724 | ||
1725 | char * | |
1726 | xtensa_emit_movcc (bool inverted, bool isfp, bool isbool, rtx *operands) | |
1727 | { | |
1728 | static char result[64]; | |
1729 | enum rtx_code code; | |
1730 | const char *op; | |
1731 | ||
1732 | code = GET_CODE (operands[4]); | |
1733 | if (isbool) | |
1734 | { | |
1735 | switch (code) | |
1736 | { | |
1737 | case EQ: op = inverted ? "t" : "f"; break; | |
1738 | case NE: op = inverted ? "f" : "t"; break; | |
1739 | default: gcc_unreachable (); | |
1740 | } | |
1741 | } | |
1742 | else | |
1743 | { | |
1744 | switch (code) | |
1745 | { | |
1746 | case EQ: op = inverted ? "nez" : "eqz"; break; | |
1747 | case NE: op = inverted ? "eqz" : "nez"; break; | |
1748 | case LT: op = inverted ? "gez" : "ltz"; break; | |
1749 | case GE: op = inverted ? "ltz" : "gez"; break; | |
1750 | default: gcc_unreachable (); | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | sprintf (result, "mov%s%s\t%%0, %%%d, %%1", | |
1755 | op, isfp ? ".s" : "", inverted ? 3 : 2); | |
1756 | return result; | |
1757 | } | |
1758 | ||
1759 | ||
03984308 | 1760 | char * |
ffbc8796 | 1761 | xtensa_emit_call (int callop, rtx *operands) |
03984308 | 1762 | { |
b64a1b53 | 1763 | static char result[64]; |
03984308 BW |
1764 | rtx tgt = operands[callop]; |
1765 | ||
1766 | if (GET_CODE (tgt) == CONST_INT) | |
1d0ea52e | 1767 | sprintf (result, "call8\t0x%lx", INTVAL (tgt)); |
03984308 BW |
1768 | else if (register_operand (tgt, VOIDmode)) |
1769 | sprintf (result, "callx8\t%%%d", callop); | |
1770 | else | |
1771 | sprintf (result, "call8\t%%%d", callop); | |
1772 | ||
1773 | return result; | |
1774 | } | |
1775 | ||
1776 | ||
da1f39e4 BW |
1777 | bool |
1778 | xtensa_legitimate_address_p (enum machine_mode mode, rtx addr, bool strict) | |
1779 | { | |
1780 | /* Allow constant pool addresses. */ | |
1781 | if (mode != BLKmode && GET_MODE_SIZE (mode) >= UNITS_PER_WORD | |
6a7a462c BW |
1782 | && ! TARGET_CONST16 && constantpool_address_p (addr) |
1783 | && ! xtensa_tls_referenced_p (addr)) | |
da1f39e4 BW |
1784 | return true; |
1785 | ||
1786 | while (GET_CODE (addr) == SUBREG) | |
1787 | addr = SUBREG_REG (addr); | |
1788 | ||
1789 | /* Allow base registers. */ | |
1790 | if (GET_CODE (addr) == REG && BASE_REG_P (addr, strict)) | |
1791 | return true; | |
1792 | ||
1793 | /* Check for "register + offset" addressing. */ | |
1794 | if (GET_CODE (addr) == PLUS) | |
1795 | { | |
1796 | rtx xplus0 = XEXP (addr, 0); | |
1797 | rtx xplus1 = XEXP (addr, 1); | |
1798 | enum rtx_code code0; | |
1799 | enum rtx_code code1; | |
1800 | ||
1801 | while (GET_CODE (xplus0) == SUBREG) | |
1802 | xplus0 = SUBREG_REG (xplus0); | |
1803 | code0 = GET_CODE (xplus0); | |
1804 | ||
1805 | while (GET_CODE (xplus1) == SUBREG) | |
1806 | xplus1 = SUBREG_REG (xplus1); | |
1807 | code1 = GET_CODE (xplus1); | |
1808 | ||
1809 | /* Swap operands if necessary so the register is first. */ | |
1810 | if (code0 != REG && code1 == REG) | |
1811 | { | |
1812 | xplus0 = XEXP (addr, 1); | |
1813 | xplus1 = XEXP (addr, 0); | |
1814 | code0 = GET_CODE (xplus0); | |
1815 | code1 = GET_CODE (xplus1); | |
1816 | } | |
1817 | ||
1818 | if (code0 == REG && BASE_REG_P (xplus0, strict) | |
1819 | && code1 == CONST_INT | |
1820 | && xtensa_mem_offset (INTVAL (xplus1), mode)) | |
1821 | return true; | |
1822 | } | |
1823 | ||
1824 | return false; | |
1825 | } | |
1826 | ||
1827 | ||
6a7a462c BW |
1828 | /* Construct the SYMBOL_REF for the _TLS_MODULE_BASE_ symbol. */ |
1829 | ||
1830 | static GTY(()) rtx xtensa_tls_module_base_symbol; | |
1831 | ||
1832 | static rtx | |
1833 | xtensa_tls_module_base (void) | |
1834 | { | |
1835 | if (! xtensa_tls_module_base_symbol) | |
1836 | { | |
1837 | xtensa_tls_module_base_symbol = | |
1838 | gen_rtx_SYMBOL_REF (Pmode, "_TLS_MODULE_BASE_"); | |
1839 | SYMBOL_REF_FLAGS (xtensa_tls_module_base_symbol) | |
1840 | |= TLS_MODEL_GLOBAL_DYNAMIC << SYMBOL_FLAG_TLS_SHIFT; | |
1841 | } | |
1842 | ||
1843 | return xtensa_tls_module_base_symbol; | |
1844 | } | |
1845 | ||
1846 | ||
1847 | static rtx | |
1848 | xtensa_call_tls_desc (rtx sym, rtx *retp) | |
1849 | { | |
1850 | rtx fn, arg, a10, call_insn, insns; | |
1851 | ||
1852 | start_sequence (); | |
1853 | fn = gen_reg_rtx (Pmode); | |
1854 | arg = gen_reg_rtx (Pmode); | |
1855 | a10 = gen_rtx_REG (Pmode, 10); | |
1856 | ||
1857 | emit_insn (gen_tls_func (fn, sym)); | |
1858 | emit_insn (gen_tls_arg (arg, sym)); | |
1859 | emit_move_insn (a10, arg); | |
1860 | call_insn = emit_call_insn (gen_tls_call (a10, fn, sym, const1_rtx)); | |
44f370bf | 1861 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), a10); |
6a7a462c BW |
1862 | insns = get_insns (); |
1863 | end_sequence (); | |
1864 | ||
1865 | *retp = a10; | |
1866 | return insns; | |
1867 | } | |
1868 | ||
1869 | ||
1870 | static rtx | |
1871 | xtensa_legitimize_tls_address (rtx x) | |
1872 | { | |
1873 | unsigned int model = SYMBOL_REF_TLS_MODEL (x); | |
1874 | rtx dest, tp, ret, modbase, base, addend, insns; | |
1875 | ||
1876 | dest = gen_reg_rtx (Pmode); | |
1877 | switch (model) | |
1878 | { | |
1879 | case TLS_MODEL_GLOBAL_DYNAMIC: | |
1880 | insns = xtensa_call_tls_desc (x, &ret); | |
1881 | emit_libcall_block (insns, dest, ret, x); | |
1882 | break; | |
1883 | ||
1884 | case TLS_MODEL_LOCAL_DYNAMIC: | |
1885 | base = gen_reg_rtx (Pmode); | |
1886 | modbase = xtensa_tls_module_base (); | |
1887 | insns = xtensa_call_tls_desc (modbase, &ret); | |
1888 | emit_libcall_block (insns, base, ret, modbase); | |
1889 | addend = force_reg (SImode, gen_sym_DTPOFF (x)); | |
1890 | emit_insn (gen_addsi3 (dest, base, addend)); | |
1891 | break; | |
1892 | ||
1893 | case TLS_MODEL_INITIAL_EXEC: | |
1894 | case TLS_MODEL_LOCAL_EXEC: | |
1895 | tp = gen_reg_rtx (SImode); | |
1896 | emit_insn (gen_load_tp (tp)); | |
1897 | addend = force_reg (SImode, gen_sym_TPOFF (x)); | |
1898 | emit_insn (gen_addsi3 (dest, tp, addend)); | |
1899 | break; | |
1900 | ||
1901 | default: | |
1902 | gcc_unreachable (); | |
1903 | } | |
1904 | ||
1905 | return dest; | |
1906 | } | |
1907 | ||
1908 | ||
da1f39e4 BW |
1909 | rtx |
1910 | xtensa_legitimize_address (rtx x, | |
1911 | rtx oldx ATTRIBUTE_UNUSED, | |
1912 | enum machine_mode mode) | |
1913 | { | |
6a7a462c BW |
1914 | if (xtensa_tls_symbol_p (x)) |
1915 | return xtensa_legitimize_tls_address (x); | |
1916 | ||
da1f39e4 BW |
1917 | if (GET_CODE (x) == PLUS) |
1918 | { | |
1919 | rtx plus0 = XEXP (x, 0); | |
1920 | rtx plus1 = XEXP (x, 1); | |
1921 | ||
1922 | if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) | |
1923 | { | |
1924 | plus0 = XEXP (x, 1); | |
1925 | plus1 = XEXP (x, 0); | |
1926 | } | |
1927 | ||
1928 | /* Try to split up the offset to use an ADDMI instruction. */ | |
1929 | if (GET_CODE (plus0) == REG | |
1930 | && GET_CODE (plus1) == CONST_INT | |
1931 | && !xtensa_mem_offset (INTVAL (plus1), mode) | |
1932 | && !xtensa_simm8 (INTVAL (plus1)) | |
1933 | && xtensa_mem_offset (INTVAL (plus1) & 0xff, mode) | |
1934 | && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) | |
1935 | { | |
1936 | rtx temp = gen_reg_rtx (Pmode); | |
1937 | rtx addmi_offset = GEN_INT (INTVAL (plus1) & ~0xff); | |
1938 | emit_insn (gen_rtx_SET (Pmode, temp, | |
1939 | gen_rtx_PLUS (Pmode, plus0, addmi_offset))); | |
1940 | return gen_rtx_PLUS (Pmode, temp, GEN_INT (INTVAL (plus1) & 0xff)); | |
1941 | } | |
1942 | } | |
1943 | ||
506d7b68 | 1944 | return x; |
da1f39e4 BW |
1945 | } |
1946 | ||
a1a79768 AS |
1947 | /* Worker function for TARGET_MODE_DEPENDENT_ADDRESS_P. |
1948 | ||
1949 | Treat constant-pool references as "mode dependent" since they can | |
1950 | only be accessed with SImode loads. This works around a bug in the | |
1951 | combiner where a constant pool reference is temporarily converted | |
1952 | to an HImode load, which is then assumed to zero-extend based on | |
1953 | our definition of LOAD_EXTEND_OP. This is wrong because the high | |
1954 | bits of a 16-bit value in the constant pool are now sign-extended | |
1955 | by default. */ | |
1956 | ||
1957 | static bool | |
1958 | xtensa_mode_dependent_address_p (const_rtx addr) | |
1959 | { | |
1960 | return constantpool_address_p (addr); | |
1961 | } | |
da1f39e4 | 1962 | |
6a7a462c BW |
1963 | /* Helper for xtensa_tls_referenced_p. */ |
1964 | ||
1965 | static int | |
1966 | xtensa_tls_referenced_p_1 (rtx *x, void *data ATTRIBUTE_UNUSED) | |
1967 | { | |
1968 | if (GET_CODE (*x) == SYMBOL_REF) | |
1969 | return SYMBOL_REF_TLS_MODEL (*x) != 0; | |
1970 | ||
1971 | /* Ignore TLS references that have already been legitimized. */ | |
1972 | if (GET_CODE (*x) == UNSPEC) | |
1973 | { | |
1974 | switch (XINT (*x, 1)) | |
1975 | { | |
1976 | case UNSPEC_TPOFF: | |
1977 | case UNSPEC_DTPOFF: | |
1978 | case UNSPEC_TLS_FUNC: | |
1979 | case UNSPEC_TLS_ARG: | |
1980 | case UNSPEC_TLS_CALL: | |
1981 | return -1; | |
1982 | default: | |
1983 | break; | |
1984 | } | |
1985 | } | |
1986 | ||
1987 | return 0; | |
1988 | } | |
1989 | ||
1990 | ||
1991 | /* Return TRUE if X contains any TLS symbol references. */ | |
1992 | ||
1993 | bool | |
1994 | xtensa_tls_referenced_p (rtx x) | |
1995 | { | |
1996 | if (! TARGET_HAVE_TLS) | |
1997 | return false; | |
1998 | ||
1999 | return for_each_rtx (&x, xtensa_tls_referenced_p_1, NULL); | |
2000 | } | |
2001 | ||
2002 | ||
fbbf66e7 RS |
2003 | /* Implement TARGET_CANNOT_FORCE_CONST_MEM. */ |
2004 | ||
2005 | static bool | |
2006 | xtensa_cannot_force_const_mem (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x) | |
2007 | { | |
2008 | return xtensa_tls_referenced_p (x); | |
2009 | } | |
2010 | ||
2011 | ||
b0c6e48f | 2012 | /* Return the debugger register number to use for 'regno'. */ |
03984308 BW |
2013 | |
2014 | int | |
ffbc8796 | 2015 | xtensa_dbx_register_number (int regno) |
03984308 BW |
2016 | { |
2017 | int first = -1; | |
633e4eb4 BW |
2018 | |
2019 | if (GP_REG_P (regno)) | |
2020 | { | |
2021 | regno -= GP_REG_FIRST; | |
2022 | first = 0; | |
2023 | } | |
2024 | else if (BR_REG_P (regno)) | |
2025 | { | |
2026 | regno -= BR_REG_FIRST; | |
2027 | first = 16; | |
2028 | } | |
2029 | else if (FP_REG_P (regno)) | |
2030 | { | |
2031 | regno -= FP_REG_FIRST; | |
b0c6e48f | 2032 | first = 48; |
633e4eb4 | 2033 | } |
03984308 BW |
2034 | else if (ACC_REG_P (regno)) |
2035 | { | |
b0c6e48f BW |
2036 | first = 0x200; /* Start of Xtensa special registers. */ |
2037 | regno = 16; /* ACCLO is special register 16. */ | |
03984308 BW |
2038 | } |
2039 | ||
2040 | /* When optimizing, we sometimes get asked about pseudo-registers | |
638db43e | 2041 | that don't represent hard registers. Return 0 for these. */ |
03984308 BW |
2042 | if (first == -1) |
2043 | return 0; | |
2044 | ||
2045 | return first + regno; | |
2046 | } | |
2047 | ||
2048 | ||
2049 | /* Argument support functions. */ | |
2050 | ||
2051 | /* Initialize CUMULATIVE_ARGS for a function. */ | |
2052 | ||
2053 | void | |
997b8b4d | 2054 | init_cumulative_args (CUMULATIVE_ARGS *cum, int incoming) |
03984308 BW |
2055 | { |
2056 | cum->arg_words = 0; | |
997b8b4d | 2057 | cum->incoming = incoming; |
03984308 BW |
2058 | } |
2059 | ||
ffbc8796 | 2060 | |
03984308 BW |
2061 | /* Advance the argument to the next argument position. */ |
2062 | ||
626a4b31 NF |
2063 | static void |
2064 | xtensa_function_arg_advance (CUMULATIVE_ARGS *cum, enum machine_mode mode, | |
2065 | const_tree type, bool named ATTRIBUTE_UNUSED) | |
03984308 BW |
2066 | { |
2067 | int words, max; | |
2068 | int *arg_words; | |
2069 | ||
2070 | arg_words = &cum->arg_words; | |
2071 | max = MAX_ARGS_IN_REGISTERS; | |
2072 | ||
2073 | words = (((mode != BLKmode) | |
2074 | ? (int) GET_MODE_SIZE (mode) | |
2075 | : int_size_in_bytes (type)) + UNITS_PER_WORD - 1) / UNITS_PER_WORD; | |
2076 | ||
85d91d5b BW |
2077 | if (*arg_words < max |
2078 | && (targetm.calls.must_pass_in_stack (mode, type) | |
2079 | || *arg_words + words > max)) | |
03984308 BW |
2080 | *arg_words = max; |
2081 | ||
2082 | *arg_words += words; | |
2083 | } | |
2084 | ||
2085 | ||
2086 | /* Return an RTL expression containing the register for the given mode, | |
368ebcd6 | 2087 | or 0 if the argument is to be passed on the stack. INCOMING_P is nonzero |
ffbc8796 | 2088 | if this is an incoming argument to the current function. */ |
03984308 | 2089 | |
626a4b31 | 2090 | static rtx |
046845de | 2091 | xtensa_function_arg_1 (CUMULATIVE_ARGS *cum, enum machine_mode mode, |
626a4b31 | 2092 | const_tree type, bool incoming_p) |
03984308 BW |
2093 | { |
2094 | int regbase, words, max; | |
2095 | int *arg_words; | |
2096 | int regno; | |
03984308 BW |
2097 | |
2098 | arg_words = &cum->arg_words; | |
2099 | regbase = (incoming_p ? GP_ARG_FIRST : GP_OUTGOING_ARG_FIRST); | |
2100 | max = MAX_ARGS_IN_REGISTERS; | |
2101 | ||
2102 | words = (((mode != BLKmode) | |
2103 | ? (int) GET_MODE_SIZE (mode) | |
2104 | : int_size_in_bytes (type)) + UNITS_PER_WORD - 1) / UNITS_PER_WORD; | |
2105 | ||
2106 | if (type && (TYPE_ALIGN (type) > BITS_PER_WORD)) | |
822e895c | 2107 | { |
d2348985 | 2108 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_WORD; |
822e895c BW |
2109 | *arg_words = (*arg_words + align - 1) & -align; |
2110 | } | |
03984308 BW |
2111 | |
2112 | if (*arg_words + words > max) | |
2113 | return (rtx)0; | |
2114 | ||
2115 | regno = regbase + *arg_words; | |
03984308 | 2116 | |
997b8b4d BW |
2117 | if (cum->incoming && regno <= A7_REG && regno + words > A7_REG) |
2118 | cfun->machine->need_a7_copy = true; | |
03984308 | 2119 | |
997b8b4d | 2120 | return gen_rtx_REG (mode, regno); |
03984308 BW |
2121 | } |
2122 | ||
626a4b31 NF |
2123 | /* Implement TARGET_FUNCTION_ARG. */ |
2124 | ||
2125 | static rtx | |
2126 | xtensa_function_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode, | |
2127 | const_tree type, bool named ATTRIBUTE_UNUSED) | |
2128 | { | |
2129 | return xtensa_function_arg_1 (cum, mode, type, false); | |
2130 | } | |
2131 | ||
2132 | /* Implement TARGET_FUNCTION_INCOMING_ARG. */ | |
2133 | ||
2134 | static rtx | |
2135 | xtensa_function_incoming_arg (CUMULATIVE_ARGS *cum, enum machine_mode mode, | |
2136 | const_tree type, bool named ATTRIBUTE_UNUSED) | |
2137 | { | |
2138 | return xtensa_function_arg_1 (cum, mode, type, true); | |
2139 | } | |
03984308 | 2140 | |
c2ed6cf8 | 2141 | static unsigned int |
84ec98d2 | 2142 | xtensa_function_arg_boundary (enum machine_mode mode, const_tree type) |
d2348985 BW |
2143 | { |
2144 | unsigned int alignment; | |
2145 | ||
2146 | alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode); | |
2147 | if (alignment < PARM_BOUNDARY) | |
2148 | alignment = PARM_BOUNDARY; | |
2149 | if (alignment > STACK_BOUNDARY) | |
2150 | alignment = STACK_BOUNDARY; | |
2151 | return alignment; | |
2152 | } | |
2153 | ||
2154 | ||
6e5ff6e7 | 2155 | static bool |
586de218 | 2156 | xtensa_return_in_msb (const_tree valtype) |
6e5ff6e7 BW |
2157 | { |
2158 | return (TARGET_BIG_ENDIAN | |
2159 | && AGGREGATE_TYPE_P (valtype) | |
2160 | && int_size_in_bytes (valtype) >= UNITS_PER_WORD); | |
2161 | } | |
2162 | ||
2163 | ||
c5387660 JM |
2164 | static void |
2165 | xtensa_option_override (void) | |
03984308 BW |
2166 | { |
2167 | int regno; | |
2168 | enum machine_mode mode; | |
2169 | ||
2170 | if (!TARGET_BOOLEANS && TARGET_HARD_FLOAT) | |
2171 | error ("boolean registers required for the floating-point option"); | |
2172 | ||
638db43e | 2173 | /* Set up array giving whether a given register can hold a given mode. */ |
03984308 BW |
2174 | for (mode = VOIDmode; |
2175 | mode != MAX_MACHINE_MODE; | |
2176 | mode = (enum machine_mode) ((int) mode + 1)) | |
2177 | { | |
2178 | int size = GET_MODE_SIZE (mode); | |
0a2aaacc | 2179 | enum mode_class mclass = GET_MODE_CLASS (mode); |
03984308 BW |
2180 | |
2181 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2182 | { | |
2183 | int temp; | |
2184 | ||
2185 | if (ACC_REG_P (regno)) | |
f42f5a1b | 2186 | temp = (TARGET_MAC16 |
0a2aaacc | 2187 | && (mclass == MODE_INT) && (size <= UNITS_PER_WORD)); |
03984308 BW |
2188 | else if (GP_REG_P (regno)) |
2189 | temp = ((regno & 1) == 0 || (size <= UNITS_PER_WORD)); | |
2190 | else if (FP_REG_P (regno)) | |
2191 | temp = (TARGET_HARD_FLOAT && (mode == SFmode)); | |
2192 | else if (BR_REG_P (regno)) | |
2193 | temp = (TARGET_BOOLEANS && (mode == CCmode)); | |
2194 | else | |
2195 | temp = FALSE; | |
2196 | ||
2197 | xtensa_hard_regno_mode_ok[(int) mode][regno] = temp; | |
2198 | } | |
2199 | } | |
2200 | ||
2201 | init_machine_status = xtensa_init_machine_status; | |
03984308 | 2202 | |
f42f5a1b BW |
2203 | /* Check PIC settings. PIC is only supported when using L32R |
2204 | instructions, and some targets need to always use PIC. */ | |
2205 | if (flag_pic && TARGET_CONST16) | |
2206 | error ("-f%s is not supported with CONST16 instructions", | |
2207 | (flag_pic > 1 ? "PIC" : "pic")); | |
1b408ba1 SA |
2208 | else if (TARGET_FORCE_NO_PIC) |
2209 | flag_pic = 0; | |
f42f5a1b BW |
2210 | else if (XTENSA_ALWAYS_PIC) |
2211 | { | |
2212 | if (TARGET_CONST16) | |
2213 | error ("PIC is required but not supported with CONST16 instructions"); | |
2214 | flag_pic = 1; | |
2215 | } | |
2216 | /* There's no need for -fPIC (as opposed to -fpic) on Xtensa. */ | |
2217 | if (flag_pic > 1) | |
03984308 | 2218 | flag_pic = 1; |
166b25dc BW |
2219 | if (flag_pic && !flag_pie) |
2220 | flag_shlib = 1; | |
87c8b4be CT |
2221 | |
2222 | /* Hot/cold partitioning does not work on this architecture, because of | |
2223 | constant pools (the load instruction cannot necessarily reach that far). | |
2224 | Therefore disable it on this architecture. */ | |
2225 | if (flag_reorder_blocks_and_partition) | |
2226 | { | |
2227 | flag_reorder_blocks_and_partition = 0; | |
2228 | flag_reorder_blocks = 1; | |
2229 | } | |
03984308 BW |
2230 | } |
2231 | ||
03984308 BW |
2232 | /* A C compound statement to output to stdio stream STREAM the |
2233 | assembler syntax for an instruction operand X. X is an RTL | |
2234 | expression. | |
2235 | ||
2236 | CODE is a value that can be used to specify one of several ways | |
2237 | of printing the operand. It is used when identical operands | |
2238 | must be printed differently depending on the context. CODE | |
2239 | comes from the '%' specification that was used to request | |
2240 | printing of the operand. If the specification was just '%DIGIT' | |
2241 | then CODE is 0; if the specification was '%LTR DIGIT' then CODE | |
2242 | is the ASCII code for LTR. | |
2243 | ||
2244 | If X is a register, this macro should print the register's name. | |
2245 | The names can be found in an array 'reg_names' whose type is | |
2246 | 'char *[]'. 'reg_names' is initialized from 'REGISTER_NAMES'. | |
2247 | ||
2248 | When the machine description has a specification '%PUNCT' (a '%' | |
2249 | followed by a punctuation character), this macro is called with | |
2250 | a null pointer for X and the punctuation character for CODE. | |
2251 | ||
2252 | 'a', 'c', 'l', and 'n' are reserved. | |
633e4eb4 | 2253 | |
03984308 BW |
2254 | The Xtensa specific codes are: |
2255 | ||
2256 | 'd' CONST_INT, print as signed decimal | |
2257 | 'x' CONST_INT, print as signed hexadecimal | |
2258 | 'K' CONST_INT, print number of bits in mask for EXTUI | |
2259 | 'R' CONST_INT, print (X & 0x1f) | |
2260 | 'L' CONST_INT, print ((32 - X) & 0x1f) | |
2261 | 'D' REG, print second register of double-word register operand | |
2262 | 'N' MEM, print address of next word following a memory operand | |
2263 | 'v' MEM, if memory reference is volatile, output a MEMW before it | |
f42f5a1b BW |
2264 | 't' any constant, add "@h" suffix for top 16 bits |
2265 | 'b' any constant, add "@l" suffix for bottom 16 bits | |
03984308 BW |
2266 | */ |
2267 | ||
2268 | static void | |
ffbc8796 | 2269 | printx (FILE *file, signed int val) |
03984308 | 2270 | { |
ffbc8796 | 2271 | /* Print a hexadecimal value in a nice way. */ |
03984308 BW |
2272 | if ((val > -0xa) && (val < 0xa)) |
2273 | fprintf (file, "%d", val); | |
2274 | else if (val < 0) | |
2275 | fprintf (file, "-0x%x", -val); | |
2276 | else | |
2277 | fprintf (file, "0x%x", val); | |
2278 | } | |
2279 | ||
2280 | ||
2281 | void | |
ffbc8796 | 2282 | print_operand (FILE *file, rtx x, int letter) |
03984308 | 2283 | { |
f42f5a1b | 2284 | if (!x) |
03984308 BW |
2285 | error ("PRINT_OPERAND null pointer"); |
2286 | ||
f42f5a1b | 2287 | switch (letter) |
03984308 | 2288 | { |
f42f5a1b BW |
2289 | case 'D': |
2290 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) | |
2291 | fprintf (file, "%s", reg_names[xt_true_regnum (x) + 1]); | |
2292 | else | |
2293 | output_operand_lossage ("invalid %%D value"); | |
2294 | break; | |
03984308 | 2295 | |
f42f5a1b BW |
2296 | case 'v': |
2297 | if (GET_CODE (x) == MEM) | |
2298 | { | |
2299 | /* For a volatile memory reference, emit a MEMW before the | |
2300 | load or store. */ | |
66e58b33 | 2301 | if (MEM_VOLATILE_P (x) && TARGET_SERIALIZE_VOLATILE) |
f42f5a1b BW |
2302 | fprintf (file, "memw\n\t"); |
2303 | } | |
2304 | else | |
2305 | output_operand_lossage ("invalid %%v value"); | |
2306 | break; | |
03984308 | 2307 | |
f42f5a1b BW |
2308 | case 'N': |
2309 | if (GET_CODE (x) == MEM | |
2310 | && (GET_MODE (x) == DFmode || GET_MODE (x) == DImode)) | |
2311 | { | |
2312 | x = adjust_address (x, GET_MODE (x) == DFmode ? SFmode : SImode, 4); | |
2313 | output_address (XEXP (x, 0)); | |
2314 | } | |
2315 | else | |
2316 | output_operand_lossage ("invalid %%N value"); | |
2317 | break; | |
03984308 | 2318 | |
f42f5a1b BW |
2319 | case 'K': |
2320 | if (GET_CODE (x) == CONST_INT) | |
03984308 | 2321 | { |
f42f5a1b BW |
2322 | int num_bits = 0; |
2323 | unsigned val = INTVAL (x); | |
2324 | while (val & 1) | |
2325 | { | |
2326 | num_bits += 1; | |
2327 | val = val >> 1; | |
2328 | } | |
2329 | if ((val != 0) || (num_bits == 0) || (num_bits > 16)) | |
2330 | fatal_insn ("invalid mask", x); | |
03984308 | 2331 | |
f42f5a1b BW |
2332 | fprintf (file, "%d", num_bits); |
2333 | } | |
2334 | else | |
2335 | output_operand_lossage ("invalid %%K value"); | |
2336 | break; | |
03984308 | 2337 | |
f42f5a1b BW |
2338 | case 'L': |
2339 | if (GET_CODE (x) == CONST_INT) | |
2340 | fprintf (file, "%ld", (32 - INTVAL (x)) & 0x1f); | |
2341 | else | |
2342 | output_operand_lossage ("invalid %%L value"); | |
2343 | break; | |
03984308 | 2344 | |
f42f5a1b BW |
2345 | case 'R': |
2346 | if (GET_CODE (x) == CONST_INT) | |
2347 | fprintf (file, "%ld", INTVAL (x) & 0x1f); | |
2348 | else | |
2349 | output_operand_lossage ("invalid %%R value"); | |
2350 | break; | |
03984308 | 2351 | |
f42f5a1b BW |
2352 | case 'x': |
2353 | if (GET_CODE (x) == CONST_INT) | |
2354 | printx (file, INTVAL (x)); | |
2355 | else | |
2356 | output_operand_lossage ("invalid %%x value"); | |
2357 | break; | |
03984308 | 2358 | |
f42f5a1b BW |
2359 | case 'd': |
2360 | if (GET_CODE (x) == CONST_INT) | |
2361 | fprintf (file, "%ld", INTVAL (x)); | |
2362 | else | |
2363 | output_operand_lossage ("invalid %%d value"); | |
2364 | break; | |
03984308 | 2365 | |
f42f5a1b BW |
2366 | case 't': |
2367 | case 'b': | |
2368 | if (GET_CODE (x) == CONST_INT) | |
2369 | { | |
2370 | printx (file, INTVAL (x)); | |
2371 | fputs (letter == 't' ? "@h" : "@l", file); | |
2372 | } | |
2373 | else if (GET_CODE (x) == CONST_DOUBLE) | |
2374 | { | |
2375 | REAL_VALUE_TYPE r; | |
2376 | REAL_VALUE_FROM_CONST_DOUBLE (r, x); | |
2377 | if (GET_MODE (x) == SFmode) | |
2378 | { | |
2379 | long l; | |
2380 | REAL_VALUE_TO_TARGET_SINGLE (r, l); | |
2381 | fprintf (file, "0x%08lx@%c", l, letter == 't' ? 'h' : 'l'); | |
2382 | } | |
2383 | else | |
2384 | output_operand_lossage ("invalid %%t/%%b value"); | |
2385 | } | |
2386 | else if (GET_CODE (x) == CONST) | |
2387 | { | |
2388 | /* X must be a symbolic constant on ELF. Write an expression | |
2389 | suitable for 'const16' that sets the high or low 16 bits. */ | |
2390 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
2391 | || (GET_CODE (XEXP (XEXP (x, 0), 0)) != SYMBOL_REF | |
2392 | && GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
2393 | || GET_CODE (XEXP (XEXP (x, 0), 1)) != CONST_INT) | |
2394 | output_operand_lossage ("invalid %%t/%%b value"); | |
2395 | print_operand (file, XEXP (XEXP (x, 0), 0), 0); | |
2396 | fputs (letter == 't' ? "@h" : "@l", file); | |
2397 | /* There must be a non-alphanumeric character between 'h' or 'l' | |
2398 | and the number. The '-' is added by print_operand() already. */ | |
2399 | if (INTVAL (XEXP (XEXP (x, 0), 1)) >= 0) | |
2400 | fputs ("+", file); | |
2401 | print_operand (file, XEXP (XEXP (x, 0), 1), 0); | |
2402 | } | |
2403 | else | |
633e4eb4 | 2404 | { |
f42f5a1b BW |
2405 | output_addr_const (file, x); |
2406 | fputs (letter == 't' ? "@h" : "@l", file); | |
03984308 BW |
2407 | } |
2408 | break; | |
2409 | ||
2410 | default: | |
f42f5a1b BW |
2411 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) |
2412 | fprintf (file, "%s", reg_names[xt_true_regnum (x)]); | |
2413 | else if (GET_CODE (x) == MEM) | |
2414 | output_address (XEXP (x, 0)); | |
2415 | else if (GET_CODE (x) == CONST_INT) | |
2416 | fprintf (file, "%ld", INTVAL (x)); | |
2417 | else | |
2418 | output_addr_const (file, x); | |
03984308 BW |
2419 | } |
2420 | } | |
2421 | ||
2422 | ||
2423 | /* A C compound statement to output to stdio stream STREAM the | |
2424 | assembler syntax for an instruction operand that is a memory | |
fb49053f | 2425 | reference whose address is ADDR. ADDR is an RTL expression. */ |
03984308 BW |
2426 | |
2427 | void | |
ffbc8796 | 2428 | print_operand_address (FILE *file, rtx addr) |
03984308 BW |
2429 | { |
2430 | if (!addr) | |
2431 | error ("PRINT_OPERAND_ADDRESS, null pointer"); | |
2432 | ||
2433 | switch (GET_CODE (addr)) | |
2434 | { | |
2435 | default: | |
2436 | fatal_insn ("invalid address", addr); | |
2437 | break; | |
2438 | ||
2439 | case REG: | |
2440 | fprintf (file, "%s, 0", reg_names [REGNO (addr)]); | |
2441 | break; | |
2442 | ||
2443 | case PLUS: | |
2444 | { | |
2445 | rtx reg = (rtx)0; | |
2446 | rtx offset = (rtx)0; | |
2447 | rtx arg0 = XEXP (addr, 0); | |
2448 | rtx arg1 = XEXP (addr, 1); | |
2449 | ||
2450 | if (GET_CODE (arg0) == REG) | |
2451 | { | |
2452 | reg = arg0; | |
2453 | offset = arg1; | |
2454 | } | |
2455 | else if (GET_CODE (arg1) == REG) | |
2456 | { | |
2457 | reg = arg1; | |
2458 | offset = arg0; | |
2459 | } | |
2460 | else | |
2461 | fatal_insn ("no register in address", addr); | |
2462 | ||
2463 | if (CONSTANT_P (offset)) | |
2464 | { | |
2465 | fprintf (file, "%s, ", reg_names [REGNO (reg)]); | |
2466 | output_addr_const (file, offset); | |
2467 | } | |
2468 | else | |
2469 | fatal_insn ("address offset not a constant", addr); | |
2470 | } | |
2471 | break; | |
2472 | ||
2473 | case LABEL_REF: | |
2474 | case SYMBOL_REF: | |
2475 | case CONST_INT: | |
2476 | case CONST: | |
2477 | output_addr_const (file, addr); | |
2478 | break; | |
2479 | } | |
2480 | } | |
2481 | ||
2ac6bb04 | 2482 | /* Implement TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ |
03984308 | 2483 | |
2ac6bb04 | 2484 | static bool |
da1f39e4 BW |
2485 | xtensa_output_addr_const_extra (FILE *fp, rtx x) |
2486 | { | |
2487 | if (GET_CODE (x) == UNSPEC && XVECLEN (x, 0) == 1) | |
2488 | { | |
2489 | switch (XINT (x, 1)) | |
2490 | { | |
6a7a462c BW |
2491 | case UNSPEC_TPOFF: |
2492 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2493 | fputs ("@TPOFF", fp); | |
2494 | return true; | |
2495 | case UNSPEC_DTPOFF: | |
2496 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2497 | fputs ("@DTPOFF", fp); | |
2498 | return true; | |
da1f39e4 BW |
2499 | case UNSPEC_PLT: |
2500 | if (flag_pic) | |
2501 | { | |
2502 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2503 | fputs ("@PLT", fp); | |
2504 | return true; | |
2505 | } | |
2506 | break; | |
2507 | default: | |
2508 | break; | |
2509 | } | |
2510 | } | |
2511 | return false; | |
2512 | } | |
2513 | ||
2514 | ||
03984308 | 2515 | void |
ffbc8796 | 2516 | xtensa_output_literal (FILE *file, rtx x, enum machine_mode mode, int labelno) |
03984308 BW |
2517 | { |
2518 | long value_long[2]; | |
b216cd4a | 2519 | REAL_VALUE_TYPE r; |
03984308 | 2520 | int size; |
74ed13f5 | 2521 | rtx first, second; |
03984308 BW |
2522 | |
2523 | fprintf (file, "\t.literal .LC%u, ", (unsigned) labelno); | |
2524 | ||
2525 | switch (GET_MODE_CLASS (mode)) | |
2526 | { | |
2527 | case MODE_FLOAT: | |
177b6be0 | 2528 | gcc_assert (GET_CODE (x) == CONST_DOUBLE); |
03984308 | 2529 | |
b216cd4a | 2530 | REAL_VALUE_FROM_CONST_DOUBLE (r, x); |
03984308 BW |
2531 | switch (mode) |
2532 | { | |
2533 | case SFmode: | |
b216cd4a | 2534 | REAL_VALUE_TO_TARGET_SINGLE (r, value_long[0]); |
4575a800 BW |
2535 | if (HOST_BITS_PER_LONG > 32) |
2536 | value_long[0] &= 0xffffffff; | |
b216cd4a | 2537 | fprintf (file, "0x%08lx\n", value_long[0]); |
03984308 BW |
2538 | break; |
2539 | ||
2540 | case DFmode: | |
b216cd4a | 2541 | REAL_VALUE_TO_TARGET_DOUBLE (r, value_long); |
4575a800 BW |
2542 | if (HOST_BITS_PER_LONG > 32) |
2543 | { | |
2544 | value_long[0] &= 0xffffffff; | |
2545 | value_long[1] &= 0xffffffff; | |
2546 | } | |
b216cd4a ZW |
2547 | fprintf (file, "0x%08lx, 0x%08lx\n", |
2548 | value_long[0], value_long[1]); | |
03984308 BW |
2549 | break; |
2550 | ||
2551 | default: | |
177b6be0 | 2552 | gcc_unreachable (); |
03984308 BW |
2553 | } |
2554 | ||
2555 | break; | |
2556 | ||
2557 | case MODE_INT: | |
2558 | case MODE_PARTIAL_INT: | |
2559 | size = GET_MODE_SIZE (mode); | |
177b6be0 | 2560 | switch (size) |
03984308 | 2561 | { |
177b6be0 | 2562 | case 4: |
03984308 BW |
2563 | output_addr_const (file, x); |
2564 | fputs ("\n", file); | |
177b6be0 NS |
2565 | break; |
2566 | ||
2567 | case 8: | |
74ed13f5 BW |
2568 | split_double (x, &first, &second); |
2569 | output_addr_const (file, first); | |
03984308 | 2570 | fputs (", ", file); |
74ed13f5 | 2571 | output_addr_const (file, second); |
03984308 | 2572 | fputs ("\n", file); |
177b6be0 NS |
2573 | break; |
2574 | ||
2575 | default: | |
2576 | gcc_unreachable (); | |
03984308 | 2577 | } |
03984308 BW |
2578 | break; |
2579 | ||
2580 | default: | |
177b6be0 | 2581 | gcc_unreachable (); |
03984308 BW |
2582 | } |
2583 | } | |
2584 | ||
2585 | ||
2586 | /* Return the bytes needed to compute the frame pointer from the current | |
638db43e | 2587 | stack pointer. */ |
03984308 BW |
2588 | |
2589 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
2590 | #define XTENSA_STACK_ALIGN(LOC) (((LOC) + STACK_BYTES-1) & ~(STACK_BYTES-1)) | |
2591 | ||
2592 | long | |
ffbc8796 | 2593 | compute_frame_size (int size) |
03984308 | 2594 | { |
ffbc8796 | 2595 | /* Add space for the incoming static chain value. */ |
6de9cd9a | 2596 | if (cfun->static_chain_decl != NULL) |
03984308 BW |
2597 | size += (1 * UNITS_PER_WORD); |
2598 | ||
2599 | xtensa_current_frame_size = | |
2600 | XTENSA_STACK_ALIGN (size | |
38173d38 | 2601 | + crtl->outgoing_args_size |
03984308 BW |
2602 | + (WINDOW_SIZE * UNITS_PER_WORD)); |
2603 | return xtensa_current_frame_size; | |
2604 | } | |
2605 | ||
2606 | ||
b52b1749 | 2607 | bool |
ffbc8796 | 2608 | xtensa_frame_pointer_required (void) |
03984308 BW |
2609 | { |
2610 | /* The code to expand builtin_frame_addr and builtin_return_addr | |
2611 | currently uses the hard_frame_pointer instead of frame_pointer. | |
2612 | This seems wrong but maybe it's necessary for other architectures. | |
638db43e | 2613 | This function is derived from the i386 code. */ |
03984308 BW |
2614 | |
2615 | if (cfun->machine->accesses_prev_frame) | |
b52b1749 | 2616 | return true; |
03984308 | 2617 | |
b52b1749 | 2618 | return false; |
03984308 BW |
2619 | } |
2620 | ||
2621 | ||
7f0ee694 BW |
2622 | /* minimum frame = reg save area (4 words) plus static chain (1 word) |
2623 | and the total number of words must be a multiple of 128 bits. */ | |
2624 | #define MIN_FRAME_SIZE (8 * UNITS_PER_WORD) | |
2625 | ||
f42f5a1b | 2626 | void |
ffbc8796 | 2627 | xtensa_expand_prologue (void) |
f42f5a1b BW |
2628 | { |
2629 | HOST_WIDE_INT total_size; | |
2630 | rtx size_rtx; | |
4e6c2193 | 2631 | rtx insn, note_rtx; |
18dbd950 | 2632 | |
f42f5a1b BW |
2633 | total_size = compute_frame_size (get_frame_size ()); |
2634 | size_rtx = GEN_INT (total_size); | |
18dbd950 | 2635 | |
f42f5a1b | 2636 | if (total_size < (1 << (12+3))) |
35a3be48 | 2637 | insn = emit_insn (gen_entry (size_rtx)); |
03984308 BW |
2638 | else |
2639 | { | |
f42f5a1b BW |
2640 | /* Use a8 as a temporary since a0-a7 may be live. */ |
2641 | rtx tmp_reg = gen_rtx_REG (Pmode, A8_REG); | |
35a3be48 | 2642 | emit_insn (gen_entry (GEN_INT (MIN_FRAME_SIZE))); |
f42f5a1b BW |
2643 | emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE)); |
2644 | emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg)); | |
4e6c2193 | 2645 | insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg)); |
03984308 BW |
2646 | } |
2647 | ||
f42f5a1b | 2648 | if (frame_pointer_needed) |
03984308 | 2649 | { |
997b8b4d | 2650 | if (cfun->machine->set_frame_ptr_insn) |
03984308 | 2651 | { |
4e6c2193 | 2652 | rtx first; |
03984308 | 2653 | |
997b8b4d BW |
2654 | push_topmost_sequence (); |
2655 | first = get_insns (); | |
2656 | pop_topmost_sequence (); | |
03984308 | 2657 | |
f42f5a1b BW |
2658 | /* For all instructions prior to set_frame_ptr_insn, replace |
2659 | hard_frame_pointer references with stack_pointer. */ | |
2660 | for (insn = first; | |
997b8b4d | 2661 | insn != cfun->machine->set_frame_ptr_insn; |
f42f5a1b BW |
2662 | insn = NEXT_INSN (insn)) |
2663 | { | |
2664 | if (INSN_P (insn)) | |
20dca97b BW |
2665 | { |
2666 | PATTERN (insn) = replace_rtx (copy_rtx (PATTERN (insn)), | |
2667 | hard_frame_pointer_rtx, | |
2668 | stack_pointer_rtx); | |
2669 | df_insn_rescan (insn); | |
2670 | } | |
f42f5a1b BW |
2671 | } |
2672 | } | |
2673 | else | |
4e6c2193 BW |
2674 | insn = emit_insn (gen_movsi (hard_frame_pointer_rtx, |
2675 | stack_pointer_rtx)); | |
03984308 | 2676 | } |
4e6c2193 BW |
2677 | |
2678 | /* Create a note to describe the CFA. Because this is only used to set | |
2679 | DW_AT_frame_base for debug info, don't bother tracking changes through | |
2680 | each instruction in the prologue. It just takes up space. */ | |
2681 | note_rtx = gen_rtx_SET (VOIDmode, (frame_pointer_needed | |
2682 | ? hard_frame_pointer_rtx | |
2683 | : stack_pointer_rtx), | |
2684 | plus_constant (stack_pointer_rtx, -total_size)); | |
2685 | RTX_FRAME_RELATED_P (insn) = 1; | |
046845de | 2686 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); |
03984308 BW |
2687 | } |
2688 | ||
2689 | ||
f42f5a1b | 2690 | /* Clear variables at function end. */ |
03984308 BW |
2691 | |
2692 | void | |
ffbc8796 BW |
2693 | xtensa_function_epilogue (FILE *file ATTRIBUTE_UNUSED, |
2694 | HOST_WIDE_INT size ATTRIBUTE_UNUSED) | |
03984308 | 2695 | { |
03984308 BW |
2696 | xtensa_current_frame_size = 0; |
2697 | } | |
2698 | ||
2699 | ||
0c14a54d | 2700 | rtx |
ffbc8796 | 2701 | xtensa_return_addr (int count, rtx frame) |
0c14a54d | 2702 | { |
7f0ee694 | 2703 | rtx result, retaddr, curaddr, label; |
0c14a54d BW |
2704 | |
2705 | if (count == -1) | |
f42f5a1b | 2706 | retaddr = gen_rtx_REG (Pmode, A0_REG); |
0c14a54d BW |
2707 | else |
2708 | { | |
2709 | rtx addr = plus_constant (frame, -4 * UNITS_PER_WORD); | |
2710 | addr = memory_address (Pmode, addr); | |
2711 | retaddr = gen_reg_rtx (Pmode); | |
2712 | emit_move_insn (retaddr, gen_rtx_MEM (Pmode, addr)); | |
2713 | } | |
2714 | ||
2715 | /* The 2 most-significant bits of the return address on Xtensa hold | |
2716 | the register window size. To get the real return address, these | |
7f0ee694 BW |
2717 | bits must be replaced with the high bits from some address in the |
2718 | code. */ | |
2719 | ||
2720 | /* Get the 2 high bits of a local label in the code. */ | |
2721 | curaddr = gen_reg_rtx (Pmode); | |
2722 | label = gen_label_rtx (); | |
2723 | emit_label (label); | |
2724 | LABEL_PRESERVE_P (label) = 1; | |
2725 | emit_move_insn (curaddr, gen_rtx_LABEL_REF (Pmode, label)); | |
2726 | emit_insn (gen_lshrsi3 (curaddr, curaddr, GEN_INT (30))); | |
2727 | emit_insn (gen_ashlsi3 (curaddr, curaddr, GEN_INT (30))); | |
2728 | ||
2729 | /* Clear the 2 high bits of the return address. */ | |
0c14a54d | 2730 | result = gen_reg_rtx (Pmode); |
7f0ee694 BW |
2731 | emit_insn (gen_ashlsi3 (result, retaddr, GEN_INT (2))); |
2732 | emit_insn (gen_lshrsi3 (result, result, GEN_INT (2))); | |
2733 | ||
2734 | /* Combine them to get the result. */ | |
2735 | emit_insn (gen_iorsi3 (result, result, curaddr)); | |
0c14a54d BW |
2736 | return result; |
2737 | } | |
2738 | ||
2739 | ||
03984308 | 2740 | /* Create the va_list data type. |
822e895c BW |
2741 | |
2742 | This structure is set up by __builtin_saveregs. The __va_reg field | |
2743 | points to a stack-allocated region holding the contents of the | |
2744 | incoming argument registers. The __va_ndx field is an index | |
2745 | initialized to the position of the first unnamed (variable) | |
2746 | argument. This same index is also used to address the arguments | |
2747 | passed in memory. Thus, the __va_stk field is initialized to point | |
2748 | to the position of the first argument in memory offset to account | |
2749 | for the arguments passed in registers and to account for the size | |
2750 | of the argument registers not being 16-byte aligned. E.G., there | |
2751 | are 6 argument registers of 4 bytes each, but we want the __va_ndx | |
2752 | for the first stack argument to have the maximal alignment of 16 | |
2753 | bytes, so we offset the __va_stk address by 32 bytes so that | |
2754 | __va_stk[32] references the first argument on the stack. */ | |
03984308 | 2755 | |
c35d187f RH |
2756 | static tree |
2757 | xtensa_build_builtin_va_list (void) | |
03984308 | 2758 | { |
540eaea8 | 2759 | tree f_stk, f_reg, f_ndx, record, type_decl; |
03984308 | 2760 | |
540eaea8 | 2761 | record = (*lang_hooks.types.make_type) (RECORD_TYPE); |
4c4bde29 AH |
2762 | type_decl = build_decl (BUILTINS_LOCATION, |
2763 | TYPE_DECL, get_identifier ("__va_list_tag"), record); | |
03984308 | 2764 | |
4c4bde29 AH |
2765 | f_stk = build_decl (BUILTINS_LOCATION, |
2766 | FIELD_DECL, get_identifier ("__va_stk"), | |
03984308 | 2767 | ptr_type_node); |
4c4bde29 AH |
2768 | f_reg = build_decl (BUILTINS_LOCATION, |
2769 | FIELD_DECL, get_identifier ("__va_reg"), | |
03984308 | 2770 | ptr_type_node); |
4c4bde29 AH |
2771 | f_ndx = build_decl (BUILTINS_LOCATION, |
2772 | FIELD_DECL, get_identifier ("__va_ndx"), | |
03984308 BW |
2773 | integer_type_node); |
2774 | ||
2775 | DECL_FIELD_CONTEXT (f_stk) = record; | |
2776 | DECL_FIELD_CONTEXT (f_reg) = record; | |
2777 | DECL_FIELD_CONTEXT (f_ndx) = record; | |
2778 | ||
0fd2eac2 | 2779 | TYPE_STUB_DECL (record) = type_decl; |
540eaea8 | 2780 | TYPE_NAME (record) = type_decl; |
03984308 | 2781 | TYPE_FIELDS (record) = f_stk; |
910ad8de NF |
2782 | DECL_CHAIN (f_stk) = f_reg; |
2783 | DECL_CHAIN (f_reg) = f_ndx; | |
03984308 BW |
2784 | |
2785 | layout_type (record); | |
2786 | return record; | |
2787 | } | |
2788 | ||
2789 | ||
2790 | /* Save the incoming argument registers on the stack. Returns the | |
638db43e | 2791 | address of the saved registers. */ |
03984308 | 2792 | |
4c45af42 | 2793 | static rtx |
ffbc8796 | 2794 | xtensa_builtin_saveregs (void) |
03984308 | 2795 | { |
e70312d4 | 2796 | rtx gp_regs; |
38173d38 | 2797 | int arg_words = crtl->args.info.arg_words; |
03984308 | 2798 | int gp_left = MAX_ARGS_IN_REGISTERS - arg_words; |
03984308 | 2799 | |
997b8b4d | 2800 | if (gp_left <= 0) |
03984308 BW |
2801 | return const0_rtx; |
2802 | ||
3bbc2af6 | 2803 | /* Allocate the general-purpose register space. */ |
03984308 BW |
2804 | gp_regs = assign_stack_local |
2805 | (BLKmode, MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD, -1); | |
540eaea8 | 2806 | set_mem_alias_set (gp_regs, get_varargs_alias_set ()); |
03984308 BW |
2807 | |
2808 | /* Now store the incoming registers. */ | |
997b8b4d BW |
2809 | cfun->machine->need_a7_copy = true; |
2810 | cfun->machine->vararg_a7 = true; | |
e70312d4 BW |
2811 | move_block_from_reg (GP_ARG_FIRST + arg_words, |
2812 | adjust_address (gp_regs, BLKmode, | |
2813 | arg_words * UNITS_PER_WORD), | |
2814 | gp_left); | |
0d8442b8 BW |
2815 | gcc_assert (cfun->machine->vararg_a7_copy != 0); |
2816 | emit_insn_before (cfun->machine->vararg_a7_copy, get_insns ()); | |
03984308 BW |
2817 | |
2818 | return XEXP (gp_regs, 0); | |
2819 | } | |
2820 | ||
2821 | ||
2822 | /* Implement `va_start' for varargs and stdarg. We look at the | |
638db43e | 2823 | current function to fill in an initial va_list. */ |
03984308 | 2824 | |
d7bd8aeb | 2825 | static void |
ffbc8796 | 2826 | xtensa_va_start (tree valist, rtx nextarg ATTRIBUTE_UNUSED) |
03984308 BW |
2827 | { |
2828 | tree f_stk, stk; | |
2829 | tree f_reg, reg; | |
2830 | tree f_ndx, ndx; | |
2831 | tree t, u; | |
2832 | int arg_words; | |
2833 | ||
38173d38 | 2834 | arg_words = crtl->args.info.arg_words; |
03984308 BW |
2835 | |
2836 | f_stk = TYPE_FIELDS (va_list_type_node); | |
910ad8de NF |
2837 | f_reg = DECL_CHAIN (f_stk); |
2838 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 2839 | |
47a25a46 | 2840 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, f_stk, NULL_TREE); |
fa1615d7 BW |
2841 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), |
2842 | f_reg, NULL_TREE); | |
2843 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
2844 | f_ndx, NULL_TREE); | |
03984308 BW |
2845 | |
2846 | /* Call __builtin_saveregs; save the result in __va_reg */ | |
e70312d4 BW |
2847 | u = make_tree (sizetype, expand_builtin_saveregs ()); |
2848 | u = fold_convert (ptr_type_node, u); | |
726a989a | 2849 | t = build2 (MODIFY_EXPR, ptr_type_node, reg, u); |
03984308 BW |
2850 | TREE_SIDE_EFFECTS (t) = 1; |
2851 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2852 | ||
822e895c | 2853 | /* Set the __va_stk member to ($arg_ptr - 32). */ |
03984308 | 2854 | u = make_tree (ptr_type_node, virtual_incoming_args_rtx); |
e70312d4 | 2855 | u = fold_build2 (POINTER_PLUS_EXPR, ptr_type_node, u, size_int (-32)); |
726a989a | 2856 | t = build2 (MODIFY_EXPR, ptr_type_node, stk, u); |
03984308 BW |
2857 | TREE_SIDE_EFFECTS (t) = 1; |
2858 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2859 | ||
822e895c BW |
2860 | /* Set the __va_ndx member. If the first variable argument is on |
2861 | the stack, adjust __va_ndx by 2 words to account for the extra | |
2862 | alignment offset for __va_stk. */ | |
2863 | if (arg_words >= MAX_ARGS_IN_REGISTERS) | |
2864 | arg_words += 2; | |
726a989a | 2865 | t = build2 (MODIFY_EXPR, integer_type_node, ndx, |
f4d3e7fd | 2866 | build_int_cst (integer_type_node, arg_words * UNITS_PER_WORD)); |
03984308 BW |
2867 | TREE_SIDE_EFFECTS (t) = 1; |
2868 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
2869 | } | |
2870 | ||
2871 | ||
2872 | /* Implement `va_arg'. */ | |
2873 | ||
85d53c1d | 2874 | static tree |
726a989a RB |
2875 | xtensa_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
2876 | gimple_seq *post_p ATTRIBUTE_UNUSED) | |
03984308 BW |
2877 | { |
2878 | tree f_stk, stk; | |
2879 | tree f_reg, reg; | |
2880 | tree f_ndx, ndx; | |
85d53c1d RH |
2881 | tree type_size, array, orig_ndx, addr, size, va_size, t; |
2882 | tree lab_false, lab_over, lab_false2; | |
08b0dc1b RH |
2883 | bool indirect; |
2884 | ||
2885 | indirect = pass_by_reference (NULL, TYPE_MODE (type), type, false); | |
2886 | if (indirect) | |
2887 | type = build_pointer_type (type); | |
03984308 | 2888 | |
3712281f BW |
2889 | /* Handle complex values as separate real and imaginary parts. */ |
2890 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
2891 | { | |
85d53c1d | 2892 | tree real_part, imag_part; |
3712281f | 2893 | |
85d53c1d RH |
2894 | real_part = xtensa_gimplify_va_arg_expr (valist, TREE_TYPE (type), |
2895 | pre_p, NULL); | |
2896 | real_part = get_initialized_tmp_var (real_part, pre_p, NULL); | |
3712281f | 2897 | |
fa1615d7 BW |
2898 | imag_part = xtensa_gimplify_va_arg_expr (unshare_expr (valist), |
2899 | TREE_TYPE (type), | |
85d53c1d RH |
2900 | pre_p, NULL); |
2901 | imag_part = get_initialized_tmp_var (imag_part, pre_p, NULL); | |
3712281f | 2902 | |
47a25a46 | 2903 | return build2 (COMPLEX_EXPR, type, real_part, imag_part); |
3712281f BW |
2904 | } |
2905 | ||
03984308 | 2906 | f_stk = TYPE_FIELDS (va_list_type_node); |
910ad8de NF |
2907 | f_reg = DECL_CHAIN (f_stk); |
2908 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 2909 | |
fa1615d7 BW |
2910 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, |
2911 | f_stk, NULL_TREE); | |
2912 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), | |
2913 | f_reg, NULL_TREE); | |
2914 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
2915 | f_ndx, NULL_TREE); | |
03984308 | 2916 | |
85d53c1d RH |
2917 | type_size = size_in_bytes (type); |
2918 | va_size = round_up (type_size, UNITS_PER_WORD); | |
2919 | gimplify_expr (&va_size, pre_p, NULL, is_gimple_val, fb_rvalue); | |
8be56275 | 2920 | |
03984308 | 2921 | |
822e895c | 2922 | /* First align __va_ndx if necessary for this arg: |
03984308 | 2923 | |
85d53c1d | 2924 | orig_ndx = (AP).__va_ndx; |
822e895c | 2925 | if (__alignof__ (TYPE) > 4 ) |
85d53c1d | 2926 | orig_ndx = ((orig_ndx + __alignof__ (TYPE) - 1) |
822e895c | 2927 | & -__alignof__ (TYPE)); */ |
03984308 | 2928 | |
85d53c1d RH |
2929 | orig_ndx = get_initialized_tmp_var (ndx, pre_p, NULL); |
2930 | ||
03984308 BW |
2931 | if (TYPE_ALIGN (type) > BITS_PER_WORD) |
2932 | { | |
d2348985 | 2933 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_UNIT; |
85d53c1d | 2934 | |
fa1615d7 | 2935 | t = build2 (PLUS_EXPR, integer_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
2936 | build_int_cst (integer_type_node, align - 1)); |
2937 | t = build2 (BIT_AND_EXPR, integer_type_node, t, | |
2938 | build_int_cst (integer_type_node, -align)); | |
fa1615d7 | 2939 | gimplify_assign (unshare_expr (orig_ndx), t, pre_p); |
03984308 BW |
2940 | } |
2941 | ||
2942 | ||
2943 | /* Increment __va_ndx to point past the argument: | |
2944 | ||
85d53c1d | 2945 | (AP).__va_ndx = orig_ndx + __va_size (TYPE); */ |
03984308 | 2946 | |
85d53c1d | 2947 | t = fold_convert (integer_type_node, va_size); |
47a25a46 | 2948 | t = build2 (PLUS_EXPR, integer_type_node, orig_ndx, t); |
fa1615d7 | 2949 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 BW |
2950 | |
2951 | ||
2952 | /* Check if the argument is in registers: | |
2953 | ||
bcf88f9b | 2954 | if ((AP).__va_ndx <= __MAX_ARGS_IN_REGISTERS * 4 |
fe984136 | 2955 | && !must_pass_in_stack (type)) |
ffbc8796 | 2956 | __array = (AP).__va_reg; */ |
03984308 | 2957 | |
85d53c1d | 2958 | array = create_tmp_var (ptr_type_node, NULL); |
03984308 | 2959 | |
85d53c1d | 2960 | lab_over = NULL; |
fe984136 | 2961 | if (!targetm.calls.must_pass_in_stack (TYPE_MODE (type), type)) |
bcf88f9b | 2962 | { |
4c4bde29 AH |
2963 | lab_false = create_artificial_label (UNKNOWN_LOCATION); |
2964 | lab_over = create_artificial_label (UNKNOWN_LOCATION); | |
85d53c1d | 2965 | |
fa1615d7 | 2966 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (ndx), |
f4d3e7fd BW |
2967 | build_int_cst (integer_type_node, |
2968 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
2969 | t = build3 (COND_EXPR, void_type_node, t, |
2970 | build1 (GOTO_EXPR, void_type_node, lab_false), | |
2971 | NULL_TREE); | |
85d53c1d RH |
2972 | gimplify_and_add (t, pre_p); |
2973 | ||
fa1615d7 | 2974 | gimplify_assign (unshare_expr (array), reg, pre_p); |
85d53c1d | 2975 | |
47a25a46 | 2976 | t = build1 (GOTO_EXPR, void_type_node, lab_over); |
85d53c1d RH |
2977 | gimplify_and_add (t, pre_p); |
2978 | ||
47a25a46 | 2979 | t = build1 (LABEL_EXPR, void_type_node, lab_false); |
85d53c1d | 2980 | gimplify_and_add (t, pre_p); |
bcf88f9b | 2981 | } |
03984308 | 2982 | |
85d53c1d | 2983 | |
03984308 BW |
2984 | /* ...otherwise, the argument is on the stack (never split between |
2985 | registers and the stack -- change __va_ndx if necessary): | |
2986 | ||
2987 | else | |
2988 | { | |
822e895c BW |
2989 | if (orig_ndx <= __MAX_ARGS_IN_REGISTERS * 4) |
2990 | (AP).__va_ndx = 32 + __va_size (TYPE); | |
03984308 | 2991 | __array = (AP).__va_stk; |
ffbc8796 | 2992 | } */ |
03984308 | 2993 | |
4c4bde29 | 2994 | lab_false2 = create_artificial_label (UNKNOWN_LOCATION); |
03984308 | 2995 | |
fa1615d7 | 2996 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
2997 | build_int_cst (integer_type_node, |
2998 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
2999 | t = build3 (COND_EXPR, void_type_node, t, |
3000 | build1 (GOTO_EXPR, void_type_node, lab_false2), | |
3001 | NULL_TREE); | |
85d53c1d | 3002 | gimplify_and_add (t, pre_p); |
03984308 | 3003 | |
fa1615d7 | 3004 | t = size_binop (PLUS_EXPR, unshare_expr (va_size), size_int (32)); |
85d53c1d | 3005 | t = fold_convert (integer_type_node, t); |
fa1615d7 | 3006 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 | 3007 | |
47a25a46 | 3008 | t = build1 (LABEL_EXPR, void_type_node, lab_false2); |
85d53c1d | 3009 | gimplify_and_add (t, pre_p); |
03984308 | 3010 | |
726a989a | 3011 | gimplify_assign (array, stk, pre_p); |
85d53c1d RH |
3012 | |
3013 | if (lab_over) | |
3014 | { | |
47a25a46 | 3015 | t = build1 (LABEL_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3016 | gimplify_and_add (t, pre_p); |
3017 | } | |
8be56275 | 3018 | |
03984308 BW |
3019 | |
3020 | /* Given the base array pointer (__array) and index to the subsequent | |
3021 | argument (__va_ndx), find the address: | |
3022 | ||
8be56275 BW |
3023 | __array + (AP).__va_ndx - (BYTES_BIG_ENDIAN && sizeof (TYPE) < 4 |
3024 | ? sizeof (TYPE) | |
3025 | : __va_size (TYPE)) | |
03984308 BW |
3026 | |
3027 | The results are endian-dependent because values smaller than one word | |
ffbc8796 | 3028 | are aligned differently. */ |
03984308 | 3029 | |
633e4eb4 | 3030 | |
85d91d5b | 3031 | if (BYTES_BIG_ENDIAN && TREE_CODE (type_size) == INTEGER_CST) |
8be56275 | 3032 | { |
fa1615d7 | 3033 | t = fold_build2 (GE_EXPR, boolean_type_node, unshare_expr (type_size), |
e70312d4 | 3034 | size_int (PARM_BOUNDARY / BITS_PER_UNIT)); |
fa1615d7 BW |
3035 | t = fold_build3 (COND_EXPR, sizetype, t, unshare_expr (va_size), |
3036 | unshare_expr (type_size)); | |
85d53c1d | 3037 | size = t; |
8be56275 | 3038 | } |
85d53c1d | 3039 | else |
fa1615d7 | 3040 | size = unshare_expr (va_size); |
85d53c1d | 3041 | |
fa1615d7 | 3042 | t = fold_convert (sizetype, unshare_expr (ndx)); |
f4d3e7fd | 3043 | t = build2 (MINUS_EXPR, sizetype, t, size); |
fa1615d7 | 3044 | addr = build2 (POINTER_PLUS_EXPR, ptr_type_node, unshare_expr (array), t); |
03984308 | 3045 | |
85d53c1d | 3046 | addr = fold_convert (build_pointer_type (type), addr); |
08b0dc1b | 3047 | if (indirect) |
d6e9821f RH |
3048 | addr = build_va_arg_indirect_ref (addr); |
3049 | return build_va_arg_indirect_ref (addr); | |
03984308 BW |
3050 | } |
3051 | ||
3052 | ||
09fa8841 BW |
3053 | /* Builtins. */ |
3054 | ||
3055 | enum xtensa_builtin | |
3056 | { | |
3057 | XTENSA_BUILTIN_UMULSIDI3, | |
6a7a462c BW |
3058 | XTENSA_BUILTIN_THREAD_POINTER, |
3059 | XTENSA_BUILTIN_SET_THREAD_POINTER, | |
09fa8841 BW |
3060 | XTENSA_BUILTIN_max |
3061 | }; | |
3062 | ||
3063 | ||
3064 | static void | |
3065 | xtensa_init_builtins (void) | |
3066 | { | |
6a7a462c | 3067 | tree ftype, decl; |
09fa8841 BW |
3068 | |
3069 | ftype = build_function_type_list (unsigned_intDI_type_node, | |
3070 | unsigned_intSI_type_node, | |
3071 | unsigned_intSI_type_node, NULL_TREE); | |
3072 | ||
6a7a462c BW |
3073 | decl = add_builtin_function ("__builtin_umulsidi3", ftype, |
3074 | XTENSA_BUILTIN_UMULSIDI3, BUILT_IN_MD, | |
3075 | "__umulsidi3", NULL_TREE); | |
3076 | TREE_NOTHROW (decl) = 1; | |
3077 | TREE_READONLY (decl) = 1; | |
3078 | ||
3079 | if (TARGET_THREADPTR) | |
3080 | { | |
de530b86 | 3081 | ftype = build_function_type_list (ptr_type_node, NULL_TREE); |
6a7a462c BW |
3082 | decl = add_builtin_function ("__builtin_thread_pointer", ftype, |
3083 | XTENSA_BUILTIN_THREAD_POINTER, BUILT_IN_MD, | |
3084 | NULL, NULL_TREE); | |
3085 | TREE_READONLY (decl) = 1; | |
3086 | TREE_NOTHROW (decl) = 1; | |
3087 | ||
3088 | ftype = build_function_type_list (void_type_node, ptr_type_node, | |
3089 | NULL_TREE); | |
3090 | decl = add_builtin_function ("__builtin_set_thread_pointer", ftype, | |
3091 | XTENSA_BUILTIN_SET_THREAD_POINTER, | |
3092 | BUILT_IN_MD, NULL, NULL_TREE); | |
3093 | TREE_NOTHROW (decl) = 1; | |
3094 | } | |
09fa8841 BW |
3095 | } |
3096 | ||
3097 | ||
3098 | static tree | |
f311c3b4 NF |
3099 | xtensa_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *args, |
3100 | bool ignore ATTRIBUTE_UNUSED) | |
09fa8841 BW |
3101 | { |
3102 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); | |
3103 | tree arg0, arg1; | |
3104 | ||
6a7a462c | 3105 | switch (fcode) |
09fa8841 | 3106 | { |
6a7a462c | 3107 | case XTENSA_BUILTIN_UMULSIDI3: |
f311c3b4 NF |
3108 | arg0 = args[0]; |
3109 | arg1 = args[1]; | |
09fa8841 BW |
3110 | if ((TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST) |
3111 | || TARGET_MUL32_HIGH) | |
3112 | return fold_build2 (MULT_EXPR, unsigned_intDI_type_node, | |
3113 | fold_convert (unsigned_intDI_type_node, arg0), | |
3114 | fold_convert (unsigned_intDI_type_node, arg1)); | |
6a7a462c BW |
3115 | break; |
3116 | ||
3117 | case XTENSA_BUILTIN_THREAD_POINTER: | |
3118 | case XTENSA_BUILTIN_SET_THREAD_POINTER: | |
3119 | break; | |
3120 | ||
3121 | default: | |
3122 | internal_error ("bad builtin code"); | |
3123 | break; | |
09fa8841 BW |
3124 | } |
3125 | ||
09fa8841 BW |
3126 | return NULL; |
3127 | } | |
3128 | ||
3129 | ||
3130 | static rtx | |
3131 | xtensa_expand_builtin (tree exp, rtx target, | |
3132 | rtx subtarget ATTRIBUTE_UNUSED, | |
3133 | enum machine_mode mode ATTRIBUTE_UNUSED, | |
3134 | int ignore) | |
3135 | { | |
ec3643e8 | 3136 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
09fa8841 | 3137 | unsigned int fcode = DECL_FUNCTION_CODE (fndecl); |
6a7a462c BW |
3138 | rtx arg; |
3139 | ||
3140 | switch (fcode) | |
3141 | { | |
3142 | case XTENSA_BUILTIN_UMULSIDI3: | |
3143 | /* The umulsidi3 builtin is just a mechanism to avoid calling the real | |
3144 | __umulsidi3 function when the Xtensa configuration can directly | |
3145 | implement it. If not, just call the function. */ | |
3146 | return expand_call (exp, target, ignore); | |
09fa8841 | 3147 | |
6a7a462c BW |
3148 | case XTENSA_BUILTIN_THREAD_POINTER: |
3149 | if (!target || !register_operand (target, Pmode)) | |
3150 | target = gen_reg_rtx (Pmode); | |
3151 | emit_insn (gen_load_tp (target)); | |
3152 | return target; | |
09fa8841 | 3153 | |
6a7a462c BW |
3154 | case XTENSA_BUILTIN_SET_THREAD_POINTER: |
3155 | arg = expand_normal (CALL_EXPR_ARG (exp, 0)); | |
3156 | if (!register_operand (arg, Pmode)) | |
3157 | arg = copy_to_mode_reg (Pmode, arg); | |
3158 | emit_insn (gen_set_tp (arg)); | |
3159 | return const0_rtx; | |
3160 | ||
3161 | default: | |
3162 | internal_error ("bad builtin code"); | |
3163 | } | |
09fa8841 BW |
3164 | return NULL_RTX; |
3165 | } | |
3166 | ||
a6e508f9 | 3167 | /* Worker function for TARGET_PREFERRED_RELOAD_CLASS. */ |
09fa8841 | 3168 | |
a6e508f9 AS |
3169 | static reg_class_t |
3170 | xtensa_preferred_reload_class (rtx x, reg_class_t rclass) | |
a8cacfd2 | 3171 | { |
a6e508f9 | 3172 | if (CONSTANT_P (x) && CONST_DOUBLE_P (x)) |
a8cacfd2 BW |
3173 | return NO_REGS; |
3174 | ||
89f6025d BW |
3175 | /* Don't use the stack pointer or hard frame pointer for reloads! |
3176 | The hard frame pointer would normally be OK except that it may | |
3177 | briefly hold an incoming argument in the prologue, and reload | |
3178 | won't know that it is live because the hard frame pointer is | |
3179 | treated specially. */ | |
3180 | ||
0a2aaacc | 3181 | if (rclass == AR_REGS || rclass == GR_REGS) |
89f6025d | 3182 | return RL_REGS; |
a8cacfd2 | 3183 | |
0a2aaacc | 3184 | return rclass; |
a8cacfd2 BW |
3185 | } |
3186 | ||
a6e508f9 AS |
3187 | /* Worker function for TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. */ |
3188 | ||
3189 | static reg_class_t | |
3190 | xtensa_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
3191 | reg_class_t rclass) | |
3192 | { | |
3193 | /* Don't use the stack pointer or hard frame pointer for reloads! | |
3194 | The hard frame pointer would normally be OK except that it may | |
3195 | briefly hold an incoming argument in the prologue, and reload | |
3196 | won't know that it is live because the hard frame pointer is | |
3197 | treated specially. */ | |
3198 | ||
3199 | if (rclass == AR_REGS || rclass == GR_REGS) | |
3200 | return RL_REGS; | |
3201 | ||
3202 | return rclass; | |
3203 | } | |
3204 | ||
3205 | /* Worker function for TARGET_SECONDARY_RELOAD. */ | |
a8cacfd2 | 3206 | |
a6e508f9 | 3207 | static reg_class_t |
a87cf97e | 3208 | xtensa_secondary_reload (bool in_p, rtx x, reg_class_t rclass, |
37fbe8a3 | 3209 | enum machine_mode mode, secondary_reload_info *sri) |
03984308 BW |
3210 | { |
3211 | int regno; | |
3212 | ||
37fbe8a3 | 3213 | if (in_p && constantpool_mem_p (x)) |
03984308 | 3214 | { |
37fbe8a3 | 3215 | if (rclass == FP_REGS) |
89f6025d | 3216 | return RL_REGS; |
37fbe8a3 BW |
3217 | |
3218 | if (mode == QImode) | |
3219 | sri->icode = CODE_FOR_reloadqi_literal; | |
3220 | else if (mode == HImode) | |
3221 | sri->icode = CODE_FOR_reloadhi_literal; | |
03984308 BW |
3222 | } |
3223 | ||
37fbe8a3 | 3224 | regno = xt_true_regnum (x); |
03984308 | 3225 | if (ACC_REG_P (regno)) |
0a2aaacc KG |
3226 | return ((rclass == GR_REGS || rclass == RL_REGS) ? NO_REGS : RL_REGS); |
3227 | if (rclass == ACC_REG) | |
89f6025d | 3228 | return (GP_REG_P (regno) ? NO_REGS : RL_REGS); |
03984308 BW |
3229 | |
3230 | return NO_REGS; | |
3231 | } | |
3232 | ||
3233 | ||
3234 | void | |
ffbc8796 | 3235 | order_regs_for_local_alloc (void) |
03984308 BW |
3236 | { |
3237 | if (!leaf_function_p ()) | |
3238 | { | |
3239 | memcpy (reg_alloc_order, reg_nonleaf_alloc_order, | |
3240 | FIRST_PSEUDO_REGISTER * sizeof (int)); | |
3241 | } | |
3242 | else | |
3243 | { | |
3244 | int i, num_arg_regs; | |
3245 | int nxt = 0; | |
3246 | ||
3bbc2af6 KH |
3247 | /* Use the AR registers in increasing order (skipping a0 and a1) |
3248 | but save the incoming argument registers for a last resort. */ | |
38173d38 | 3249 | num_arg_regs = crtl->args.info.arg_words; |
03984308 BW |
3250 | if (num_arg_regs > MAX_ARGS_IN_REGISTERS) |
3251 | num_arg_regs = MAX_ARGS_IN_REGISTERS; | |
3252 | for (i = GP_ARG_FIRST; i < 16 - num_arg_regs; i++) | |
3253 | reg_alloc_order[nxt++] = i + num_arg_regs; | |
3254 | for (i = 0; i < num_arg_regs; i++) | |
3255 | reg_alloc_order[nxt++] = GP_ARG_FIRST + i; | |
3256 | ||
3bbc2af6 | 3257 | /* List the coprocessor registers in order. */ |
985d0d50 BW |
3258 | for (i = 0; i < BR_REG_NUM; i++) |
3259 | reg_alloc_order[nxt++] = BR_REG_FIRST + i; | |
3260 | ||
3bbc2af6 | 3261 | /* List the FP registers in order for now. */ |
03984308 BW |
3262 | for (i = 0; i < 16; i++) |
3263 | reg_alloc_order[nxt++] = FP_REG_FIRST + i; | |
3264 | ||
638db43e | 3265 | /* GCC requires that we list *all* the registers.... */ |
03984308 BW |
3266 | reg_alloc_order[nxt++] = 0; /* a0 = return address */ |
3267 | reg_alloc_order[nxt++] = 1; /* a1 = stack pointer */ | |
3268 | reg_alloc_order[nxt++] = 16; /* pseudo frame pointer */ | |
3269 | reg_alloc_order[nxt++] = 17; /* pseudo arg pointer */ | |
3270 | ||
03984308 BW |
3271 | reg_alloc_order[nxt++] = ACC_REG_FIRST; /* MAC16 accumulator */ |
3272 | } | |
3273 | } | |
3274 | ||
3275 | ||
01abf342 BW |
3276 | /* Some Xtensa targets support multiple bss sections. If the section |
3277 | name ends with ".bss", add SECTION_BSS to the flags. */ | |
3278 | ||
3279 | static unsigned int | |
ffbc8796 | 3280 | xtensa_multibss_section_type_flags (tree decl, const char *name, int reloc) |
01abf342 BW |
3281 | { |
3282 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
3283 | const char *suffix; | |
3284 | ||
3285 | suffix = strrchr (name, '.'); | |
3286 | if (suffix && strcmp (suffix, ".bss") == 0) | |
3287 | { | |
3288 | if (!decl || (TREE_CODE (decl) == VAR_DECL | |
3289 | && DECL_INITIAL (decl) == NULL_TREE)) | |
3290 | flags |= SECTION_BSS; /* @nobits */ | |
3291 | else | |
d4ee4d25 | 3292 | warning (0, "only uninitialized variables can be placed in a " |
01abf342 BW |
3293 | ".bss section"); |
3294 | } | |
3295 | ||
3296 | return flags; | |
3297 | } | |
3298 | ||
3299 | ||
b64a1b53 RH |
3300 | /* The literal pool stays with the function. */ |
3301 | ||
d6b5193b | 3302 | static section * |
ffbc8796 BW |
3303 | xtensa_select_rtx_section (enum machine_mode mode ATTRIBUTE_UNUSED, |
3304 | rtx x ATTRIBUTE_UNUSED, | |
3305 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 3306 | { |
d6b5193b | 3307 | return function_section (current_function_decl); |
b64a1b53 | 3308 | } |
fb49053f | 3309 | |
5378dda2 AS |
3310 | /* Worker function for TARGET_REGISTER_MOVE_COST. */ |
3311 | ||
3312 | static int | |
3313 | xtensa_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
3314 | reg_class_t from, reg_class_t to) | |
3315 | { | |
3316 | if (from == to && from != BR_REGS && to != BR_REGS) | |
3317 | return 2; | |
3318 | else if (reg_class_subset_p (from, AR_REGS) | |
3319 | && reg_class_subset_p (to, AR_REGS)) | |
3320 | return 2; | |
3321 | else if (reg_class_subset_p (from, AR_REGS) && to == ACC_REG) | |
3322 | return 3; | |
3323 | else if (from == ACC_REG && reg_class_subset_p (to, AR_REGS)) | |
3324 | return 3; | |
3325 | else | |
3326 | return 10; | |
3327 | } | |
3328 | ||
3329 | /* Worker function for TARGET_MEMORY_MOVE_COST. */ | |
3330 | ||
3331 | static int | |
3332 | xtensa_memory_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED, | |
3333 | reg_class_t rclass ATTRIBUTE_UNUSED, | |
3334 | bool in ATTRIBUTE_UNUSED) | |
3335 | { | |
3336 | return 4; | |
3337 | } | |
ffbc8796 | 3338 | |
3c50106f RH |
3339 | /* Compute a (partial) cost for rtx X. Return true if the complete |
3340 | cost has been computed, and false if subexpressions should be | |
3341 | scanned. In either case, *TOTAL contains the cost result. */ | |
3342 | ||
3343 | static bool | |
f40751dd JH |
3344 | xtensa_rtx_costs (rtx x, int code, int outer_code, int *total, |
3345 | bool speed ATTRIBUTE_UNUSED) | |
3c50106f RH |
3346 | { |
3347 | switch (code) | |
3348 | { | |
3349 | case CONST_INT: | |
3350 | switch (outer_code) | |
3351 | { | |
3352 | case SET: | |
3353 | if (xtensa_simm12b (INTVAL (x))) | |
3354 | { | |
3355 | *total = 4; | |
3356 | return true; | |
3357 | } | |
3358 | break; | |
3359 | case PLUS: | |
3360 | if (xtensa_simm8 (INTVAL (x)) | |
3361 | || xtensa_simm8x256 (INTVAL (x))) | |
3362 | { | |
3363 | *total = 0; | |
3364 | return true; | |
3365 | } | |
3366 | break; | |
3367 | case AND: | |
3368 | if (xtensa_mask_immediate (INTVAL (x))) | |
3369 | { | |
3370 | *total = 0; | |
3371 | return true; | |
3372 | } | |
3373 | break; | |
3374 | case COMPARE: | |
3375 | if ((INTVAL (x) == 0) || xtensa_b4const (INTVAL (x))) | |
3376 | { | |
3377 | *total = 0; | |
3378 | return true; | |
3379 | } | |
3380 | break; | |
3381 | case ASHIFT: | |
3382 | case ASHIFTRT: | |
3383 | case LSHIFTRT: | |
3384 | case ROTATE: | |
3385 | case ROTATERT: | |
3bbc2af6 | 3386 | /* No way to tell if X is the 2nd operand so be conservative. */ |
3c50106f RH |
3387 | default: break; |
3388 | } | |
3389 | if (xtensa_simm12b (INTVAL (x))) | |
3390 | *total = 5; | |
f42f5a1b BW |
3391 | else if (TARGET_CONST16) |
3392 | *total = COSTS_N_INSNS (2); | |
3c50106f RH |
3393 | else |
3394 | *total = 6; | |
3395 | return true; | |
3396 | ||
3397 | case CONST: | |
3398 | case LABEL_REF: | |
3399 | case SYMBOL_REF: | |
f42f5a1b BW |
3400 | if (TARGET_CONST16) |
3401 | *total = COSTS_N_INSNS (2); | |
3402 | else | |
3403 | *total = 5; | |
3c50106f RH |
3404 | return true; |
3405 | ||
3406 | case CONST_DOUBLE: | |
f42f5a1b BW |
3407 | if (TARGET_CONST16) |
3408 | *total = COSTS_N_INSNS (4); | |
3409 | else | |
3410 | *total = 7; | |
3c50106f RH |
3411 | return true; |
3412 | ||
3413 | case MEM: | |
3414 | { | |
3415 | int num_words = | |
3416 | (GET_MODE_SIZE (GET_MODE (x)) > UNITS_PER_WORD) ? 2 : 1; | |
3417 | ||
3418 | if (memory_address_p (GET_MODE (x), XEXP ((x), 0))) | |
3419 | *total = COSTS_N_INSNS (num_words); | |
3420 | else | |
3421 | *total = COSTS_N_INSNS (2*num_words); | |
3422 | return true; | |
3423 | } | |
3424 | ||
3425 | case FFS: | |
09fa8841 | 3426 | case CTZ: |
3c50106f RH |
3427 | *total = COSTS_N_INSNS (TARGET_NSA ? 5 : 50); |
3428 | return true; | |
3429 | ||
09fa8841 BW |
3430 | case CLZ: |
3431 | *total = COSTS_N_INSNS (TARGET_NSA ? 1 : 50); | |
3432 | return true; | |
3433 | ||
3c50106f RH |
3434 | case NOT: |
3435 | *total = COSTS_N_INSNS ((GET_MODE (x) == DImode) ? 3 : 2); | |
3436 | return true; | |
3437 | ||
3438 | case AND: | |
3439 | case IOR: | |
3440 | case XOR: | |
3441 | if (GET_MODE (x) == DImode) | |
3442 | *total = COSTS_N_INSNS (2); | |
3443 | else | |
3444 | *total = COSTS_N_INSNS (1); | |
3445 | return true; | |
3446 | ||
3447 | case ASHIFT: | |
3448 | case ASHIFTRT: | |
3449 | case LSHIFTRT: | |
3450 | if (GET_MODE (x) == DImode) | |
3451 | *total = COSTS_N_INSNS (50); | |
3452 | else | |
3453 | *total = COSTS_N_INSNS (1); | |
3454 | return true; | |
3455 | ||
3456 | case ABS: | |
3457 | { | |
3458 | enum machine_mode xmode = GET_MODE (x); | |
3459 | if (xmode == SFmode) | |
3460 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); | |
3461 | else if (xmode == DFmode) | |
3462 | *total = COSTS_N_INSNS (50); | |
3463 | else | |
3464 | *total = COSTS_N_INSNS (4); | |
3465 | return true; | |
3466 | } | |
3467 | ||
3468 | case PLUS: | |
3469 | case MINUS: | |
3470 | { | |
3471 | enum machine_mode xmode = GET_MODE (x); | |
3472 | if (xmode == SFmode) | |
3473 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); | |
3474 | else if (xmode == DFmode || xmode == DImode) | |
3475 | *total = COSTS_N_INSNS (50); | |
3476 | else | |
3477 | *total = COSTS_N_INSNS (1); | |
3478 | return true; | |
3479 | } | |
3480 | ||
3481 | case NEG: | |
3482 | *total = COSTS_N_INSNS ((GET_MODE (x) == DImode) ? 4 : 2); | |
3483 | return true; | |
3484 | ||
3485 | case MULT: | |
3486 | { | |
3487 | enum machine_mode xmode = GET_MODE (x); | |
3488 | if (xmode == SFmode) | |
3489 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); | |
09fa8841 | 3490 | else if (xmode == DFmode) |
3c50106f | 3491 | *total = COSTS_N_INSNS (50); |
09fa8841 BW |
3492 | else if (xmode == DImode) |
3493 | *total = COSTS_N_INSNS (TARGET_MUL32_HIGH ? 10 : 50); | |
3c50106f RH |
3494 | else if (TARGET_MUL32) |
3495 | *total = COSTS_N_INSNS (4); | |
3496 | else if (TARGET_MAC16) | |
3497 | *total = COSTS_N_INSNS (16); | |
3498 | else if (TARGET_MUL16) | |
3499 | *total = COSTS_N_INSNS (12); | |
3500 | else | |
3501 | *total = COSTS_N_INSNS (50); | |
3502 | return true; | |
3503 | } | |
3504 | ||
3505 | case DIV: | |
3506 | case MOD: | |
3507 | { | |
3508 | enum machine_mode xmode = GET_MODE (x); | |
3509 | if (xmode == SFmode) | |
3510 | { | |
3511 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); | |
3512 | return true; | |
3513 | } | |
3514 | else if (xmode == DFmode) | |
3515 | { | |
3516 | *total = COSTS_N_INSNS (50); | |
3517 | return true; | |
3518 | } | |
3519 | } | |
3bbc2af6 | 3520 | /* Fall through. */ |
3c50106f RH |
3521 | |
3522 | case UDIV: | |
3523 | case UMOD: | |
3524 | { | |
3525 | enum machine_mode xmode = GET_MODE (x); | |
3526 | if (xmode == DImode) | |
3527 | *total = COSTS_N_INSNS (50); | |
3528 | else if (TARGET_DIV32) | |
3529 | *total = COSTS_N_INSNS (32); | |
3530 | else | |
3531 | *total = COSTS_N_INSNS (50); | |
3532 | return true; | |
3533 | } | |
3534 | ||
3535 | case SQRT: | |
3536 | if (GET_MODE (x) == SFmode) | |
3537 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); | |
3538 | else | |
3539 | *total = COSTS_N_INSNS (50); | |
3540 | return true; | |
3541 | ||
3542 | case SMIN: | |
3543 | case UMIN: | |
3544 | case SMAX: | |
3545 | case UMAX: | |
3546 | *total = COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); | |
3547 | return true; | |
3548 | ||
3549 | case SIGN_EXTRACT: | |
3550 | case SIGN_EXTEND: | |
3551 | *total = COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); | |
3552 | return true; | |
3553 | ||
3554 | case ZERO_EXTRACT: | |
3555 | case ZERO_EXTEND: | |
3556 | *total = COSTS_N_INSNS (1); | |
3557 | return true; | |
3558 | ||
3559 | default: | |
3560 | return false; | |
3561 | } | |
3562 | } | |
3563 | ||
bd5bd7ac KH |
3564 | /* Worker function for TARGET_RETURN_IN_MEMORY. */ |
3565 | ||
4c45af42 | 3566 | static bool |
586de218 | 3567 | xtensa_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) |
4c45af42 KH |
3568 | { |
3569 | return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) | |
3570 | > 4 * UNITS_PER_WORD); | |
3571 | } | |
3572 | ||
e2b2d01e AS |
3573 | /* Worker function for TARGET_FUNCTION_VALUE. */ |
3574 | ||
3575 | rtx | |
3576 | xtensa_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, | |
3577 | bool outgoing) | |
3578 | { | |
3579 | return gen_rtx_REG ((INTEGRAL_TYPE_P (valtype) | |
3580 | && TYPE_PRECISION (valtype) < BITS_PER_WORD) | |
3581 | ? SImode : TYPE_MODE (valtype), | |
3582 | outgoing ? GP_OUTGOING_RETURN : GP_RETURN); | |
3583 | } | |
7f0ee694 | 3584 | |
dde8a3a4 AS |
3585 | /* Worker function for TARGET_LIBCALL_VALUE. */ |
3586 | ||
3587 | static rtx | |
3588 | xtensa_libcall_value (enum machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) | |
3589 | { | |
3590 | return gen_rtx_REG ((GET_MODE_CLASS (mode) == MODE_INT | |
3591 | && GET_MODE_SIZE (mode) < UNITS_PER_WORD) | |
3592 | ? SImode : mode, GP_RETURN); | |
3593 | } | |
3594 | ||
3595 | /* Worker function TARGET_FUNCTION_VALUE_REGNO_P. */ | |
3596 | ||
3597 | static bool | |
3598 | xtensa_function_value_regno_p (const unsigned int regno) | |
3599 | { | |
3600 | return (regno == GP_RETURN); | |
3601 | } | |
3602 | ||
2b4fa409 RH |
3603 | /* The static chain is passed in memory. Provide rtx giving 'mem' |
3604 | expressions that denote where they are stored. */ | |
3605 | ||
3606 | static rtx | |
3607 | xtensa_static_chain (const_tree ARG_UNUSED (fndecl), bool incoming_p) | |
3608 | { | |
3609 | rtx base = incoming_p ? arg_pointer_rtx : stack_pointer_rtx; | |
3610 | return gen_frame_mem (Pmode, plus_constant (base, -5 * UNITS_PER_WORD)); | |
3611 | } | |
3612 | ||
3613 | ||
7f0ee694 BW |
3614 | /* TRAMPOLINE_TEMPLATE: For Xtensa, the trampoline must perform an ENTRY |
3615 | instruction with a minimal stack frame in order to get some free | |
3616 | registers. Once the actual call target is known, the proper stack frame | |
3617 | size is extracted from the ENTRY instruction at the target and the | |
3618 | current frame is adjusted to match. The trampoline then transfers | |
3619 | control to the instruction following the ENTRY at the target. Note: | |
3620 | this assumes that the target begins with an ENTRY instruction. */ | |
3621 | ||
3c1229cb RH |
3622 | static void |
3623 | xtensa_asm_trampoline_template (FILE *stream) | |
7f0ee694 BW |
3624 | { |
3625 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); | |
3626 | ||
3627 | fprintf (stream, "\t.begin no-transform\n"); | |
3628 | fprintf (stream, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); | |
3629 | ||
3630 | if (use_call0) | |
3631 | { | |
3632 | /* Save the return address. */ | |
3633 | fprintf (stream, "\tmov\ta10, a0\n"); | |
3634 | ||
3635 | /* Use a CALL0 instruction to skip past the constants and in the | |
3636 | process get the PC into A0. This allows PC-relative access to | |
3637 | the constants without relying on L32R. */ | |
3638 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
3639 | } | |
3640 | else | |
3641 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
3642 | ||
3643 | fprintf (stream, "\t.align\t4\n"); | |
3644 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
3645 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
3646 | fprintf (stream, ".Lskipconsts:\n"); | |
3647 | ||
3648 | /* Load the static chain and function address from the trampoline. */ | |
3649 | if (use_call0) | |
3650 | { | |
3651 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
3652 | fprintf (stream, "\tl32i\ta9, a0, 0\n"); | |
3653 | fprintf (stream, "\tl32i\ta8, a0, 4\n"); | |
3654 | } | |
3655 | else | |
3656 | { | |
3657 | fprintf (stream, "\tl32r\ta9, .Lchainval\n"); | |
3658 | fprintf (stream, "\tl32r\ta8, .Lfnaddr\n"); | |
3659 | } | |
3660 | ||
3661 | /* Store the static chain. */ | |
3662 | fprintf (stream, "\ts32i\ta9, sp, %d\n", MIN_FRAME_SIZE - 20); | |
3663 | ||
3664 | /* Set the proper stack pointer value. */ | |
3665 | fprintf (stream, "\tl32i\ta9, a8, 0\n"); | |
3666 | fprintf (stream, "\textui\ta9, a9, %d, 12\n", | |
3667 | TARGET_BIG_ENDIAN ? 8 : 12); | |
3668 | fprintf (stream, "\tslli\ta9, a9, 3\n"); | |
3669 | fprintf (stream, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); | |
3670 | fprintf (stream, "\tsub\ta9, sp, a9\n"); | |
3671 | fprintf (stream, "\tmovsp\tsp, a9\n"); | |
3672 | ||
3673 | if (use_call0) | |
3674 | /* Restore the return address. */ | |
3675 | fprintf (stream, "\tmov\ta0, a10\n"); | |
3676 | ||
3677 | /* Jump to the instruction following the ENTRY. */ | |
3678 | fprintf (stream, "\taddi\ta8, a8, 3\n"); | |
3679 | fprintf (stream, "\tjx\ta8\n"); | |
3680 | ||
3681 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ | |
3682 | if (use_call0) | |
3683 | fprintf (stream, "\t.byte\t0\n"); | |
3684 | else | |
3685 | fprintf (stream, "\tnop\n"); | |
3686 | ||
3687 | fprintf (stream, "\t.end no-transform\n"); | |
3688 | } | |
3689 | ||
3c1229cb RH |
3690 | static void |
3691 | xtensa_trampoline_init (rtx m_tramp, tree fndecl, rtx chain) | |
7f0ee694 | 3692 | { |
3c1229cb | 3693 | rtx func = XEXP (DECL_RTL (fndecl), 0); |
7f0ee694 BW |
3694 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); |
3695 | int chain_off = use_call0 ? 12 : 8; | |
3696 | int func_off = use_call0 ? 16 : 12; | |
3c1229cb RH |
3697 | |
3698 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
3699 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
3700 | ||
3701 | emit_move_insn (adjust_address (m_tramp, SImode, chain_off), chain); | |
3702 | emit_move_insn (adjust_address (m_tramp, SImode, func_off), func); | |
7f0ee694 | 3703 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_sync_caches"), |
046845de | 3704 | LCT_NORMAL, VOIDmode, 1, XEXP (m_tramp, 0), Pmode); |
7f0ee694 BW |
3705 | } |
3706 | ||
1a627b35 RS |
3707 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
3708 | ||
3709 | static bool | |
3710 | xtensa_legitimate_constant_p (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x) | |
3711 | { | |
3712 | return !xtensa_tls_referenced_p (x); | |
3713 | } | |
7f0ee694 | 3714 | |
e2500fed | 3715 | #include "gt-xtensa.h" |