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03984308 | 1 | /* Subroutines for insn-output.c for Tensilica's Xtensa architecture. |
8d9254fc | 2 | Copyright (C) 2001-2020 Free Software Foundation, Inc. |
03984308 BW |
3 | Contributed by Bob Wilson (bwilson@tensilica.com) at Tensilica. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
2f83c7d6 | 9 | Software Foundation; either version 3, or (at your option) any later |
03984308 BW |
10 | version. |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
03984308 | 20 | |
8fcc61f8 RS |
21 | #define IN_TARGET_CODE 1 |
22 | ||
03984308 BW |
23 | #include "config.h" |
24 | #include "system.h" | |
4977bab6 | 25 | #include "coretypes.h" |
c7131fb2 | 26 | #include "backend.h" |
e11c4407 AM |
27 | #include "target.h" |
28 | #include "rtl.h" | |
c7131fb2 AM |
29 | #include "tree.h" |
30 | #include "gimple.h" | |
e11c4407 | 31 | #include "cfghooks.h" |
c7131fb2 | 32 | #include "df.h" |
4d0cdd0c | 33 | #include "memmodel.h" |
e11c4407 AM |
34 | #include "tm_p.h" |
35 | #include "stringpool.h" | |
314e6352 | 36 | #include "attribs.h" |
e11c4407 | 37 | #include "optabs.h" |
03984308 | 38 | #include "regs.h" |
e11c4407 | 39 | #include "emit-rtl.h" |
03984308 | 40 | #include "recog.h" |
e11c4407 AM |
41 | #include "diagnostic-core.h" |
42 | #include "cfgrtl.h" | |
03984308 | 43 | #include "output.h" |
40e23961 | 44 | #include "fold-const.h" |
d8a2d370 DN |
45 | #include "stor-layout.h" |
46 | #include "calls.h" | |
47 | #include "varasm.h" | |
36566b39 | 48 | #include "alias.h" |
36566b39 | 49 | #include "explow.h" |
36566b39 | 50 | #include "expr.h" |
03984308 | 51 | #include "reload.h" |
540eaea8 | 52 | #include "langhooks.h" |
45b0be94 | 53 | #include "gimplify.h" |
9b2b7279 | 54 | #include "builtins.h" |
6383386a FY |
55 | #include "dumpfile.h" |
56 | #include "hw-doloop.h" | |
2f36a994 | 57 | #include "rtl-iter.h" |
85d53c1d | 58 | |
994c5d85 | 59 | /* This file should be included last. */ |
d58627a0 | 60 | #include "target-def.h" |
03984308 BW |
61 | |
62 | /* Enumeration for all of the relational tests, so that we can build | |
63 | arrays indexed by the test type, and not worry about the order | |
638db43e | 64 | of EQ, NE, etc. */ |
03984308 | 65 | |
ffbc8796 BW |
66 | enum internal_test |
67 | { | |
68 | ITEST_EQ, | |
69 | ITEST_NE, | |
70 | ITEST_GT, | |
71 | ITEST_GE, | |
72 | ITEST_LT, | |
73 | ITEST_LE, | |
74 | ITEST_GTU, | |
75 | ITEST_GEU, | |
76 | ITEST_LTU, | |
77 | ITEST_LEU, | |
78 | ITEST_MAX | |
79 | }; | |
03984308 | 80 | |
03984308 BW |
81 | /* Array giving truth value on whether or not a given hard register |
82 | can support a given mode. */ | |
f939c3e6 RS |
83 | static char xtensa_hard_regno_mode_ok_p |
84 | [(int) MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER]; | |
03984308 | 85 | |
a46bbb5a | 86 | /* Largest block move to handle in-line. */ |
03984308 BW |
87 | #define LARGEST_MOVE_RATIO 15 |
88 | ||
89 | /* Define the structure for the machine field in struct function. */ | |
d1b38208 | 90 | struct GTY(()) machine_function |
03984308 BW |
91 | { |
92 | int accesses_prev_frame; | |
997b8b4d BW |
93 | bool need_a7_copy; |
94 | bool vararg_a7; | |
0d8442b8 | 95 | rtx vararg_a7_copy; |
240a513f | 96 | rtx_insn *set_frame_ptr_insn; |
ad89d820 MF |
97 | /* Current frame size calculated by compute_frame_size. */ |
98 | unsigned current_frame_size; | |
99 | /* Callee-save area size in the current frame calculated by | |
100 | compute_frame_size. */ | |
101 | int callee_save_size; | |
102 | bool frame_laid_out; | |
103 | bool epilogue_done; | |
03984308 BW |
104 | }; |
105 | ||
106 | /* Vector, indexed by hard register number, which contains 1 for a | |
107 | register that is allowable in a candidate for leaf function | |
638db43e | 108 | treatment. */ |
03984308 BW |
109 | |
110 | const char xtensa_leaf_regs[FIRST_PSEUDO_REGISTER] = | |
111 | { | |
112 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
113 | 1, 1, 1, | |
114 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, | |
115 | 1 | |
116 | }; | |
117 | ||
c5387660 | 118 | static void xtensa_option_override (void); |
ffbc8796 BW |
119 | static enum internal_test map_test_to_internal_test (enum rtx_code); |
120 | static rtx gen_int_relational (enum rtx_code, rtx, rtx, int *); | |
121 | static rtx gen_float_relational (enum rtx_code, rtx, rtx); | |
ef4bddc2 | 122 | static rtx gen_conditional_move (enum rtx_code, machine_mode, rtx, rtx); |
ffbc8796 | 123 | static rtx fixup_subreg_mem (rtx); |
ffbc8796 | 124 | static struct machine_function * xtensa_init_machine_status (void); |
6a7a462c | 125 | static rtx xtensa_legitimize_tls_address (rtx); |
ef4bddc2 | 126 | static rtx xtensa_legitimize_address (rtx, rtx, machine_mode); |
5bfed9a9 | 127 | static bool xtensa_mode_dependent_address_p (const_rtx, addr_space_t); |
586de218 | 128 | static bool xtensa_return_in_msb (const_tree); |
ffbc8796 | 129 | static void printx (FILE *, signed int); |
4c45af42 | 130 | static rtx xtensa_builtin_saveregs (void); |
ef4bddc2 | 131 | static bool xtensa_legitimate_address_p (machine_mode, rtx, bool); |
ffbc8796 BW |
132 | static unsigned int xtensa_multibss_section_type_flags (tree, const char *, |
133 | int) ATTRIBUTE_UNUSED; | |
ef4bddc2 | 134 | static section *xtensa_select_rtx_section (machine_mode, rtx, |
d6b5193b | 135 | unsigned HOST_WIDE_INT); |
e548c9df | 136 | static bool xtensa_rtx_costs (rtx, machine_mode, int, int, int *, bool); |
ef4bddc2 | 137 | static int xtensa_register_move_cost (machine_mode, reg_class_t, |
5378dda2 | 138 | reg_class_t); |
ef4bddc2 | 139 | static int xtensa_memory_move_cost (machine_mode, reg_class_t, bool); |
c35d187f | 140 | static tree xtensa_build_builtin_va_list (void); |
586de218 | 141 | static bool xtensa_return_in_memory (const_tree, const_tree); |
726a989a RB |
142 | static tree xtensa_gimplify_va_arg_expr (tree, tree, gimple_seq *, |
143 | gimple_seq *); | |
6930c98c RS |
144 | static void xtensa_function_arg_advance (cumulative_args_t, |
145 | const function_arg_info &); | |
6783fdb7 | 146 | static rtx xtensa_function_arg (cumulative_args_t, const function_arg_info &); |
d5cc9181 | 147 | static rtx xtensa_function_incoming_arg (cumulative_args_t, |
6783fdb7 | 148 | const function_arg_info &); |
e2b2d01e | 149 | static rtx xtensa_function_value (const_tree, const_tree, bool); |
ef4bddc2 | 150 | static rtx xtensa_libcall_value (machine_mode, const_rtx); |
dde8a3a4 | 151 | static bool xtensa_function_value_regno_p (const unsigned int); |
ef4bddc2 | 152 | static unsigned int xtensa_function_arg_boundary (machine_mode, |
c2ed6cf8 | 153 | const_tree); |
09fa8841 | 154 | static void xtensa_init_builtins (void); |
f311c3b4 | 155 | static tree xtensa_fold_builtin (tree, int, tree *, bool); |
ef4bddc2 | 156 | static rtx xtensa_expand_builtin (tree, rtx, rtx, machine_mode, int); |
9d0b1619 | 157 | static void xtensa_va_start (tree, rtx); |
b52b1749 | 158 | static bool xtensa_frame_pointer_required (void); |
2b4fa409 | 159 | static rtx xtensa_static_chain (const_tree, bool); |
3c1229cb RH |
160 | static void xtensa_asm_trampoline_template (FILE *); |
161 | static void xtensa_trampoline_init (rtx, tree, rtx); | |
2ac6bb04 | 162 | static bool xtensa_output_addr_const_extra (FILE *, rtx); |
ef4bddc2 | 163 | static bool xtensa_cannot_force_const_mem (machine_mode, rtx); |
b64a1b53 | 164 | |
a6e508f9 AS |
165 | static reg_class_t xtensa_preferred_reload_class (rtx, reg_class_t); |
166 | static reg_class_t xtensa_preferred_output_reload_class (rtx, reg_class_t); | |
167 | static reg_class_t xtensa_secondary_reload (bool, rtx, reg_class_t, | |
ef4bddc2 | 168 | machine_mode, |
a6e508f9 AS |
169 | struct secondary_reload_info *); |
170 | ||
a1a79768 | 171 | static bool constantpool_address_p (const_rtx addr); |
ef4bddc2 | 172 | static bool xtensa_legitimate_constant_p (machine_mode, rtx); |
6383386a FY |
173 | static void xtensa_reorg (void); |
174 | static bool xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
175 | unsigned int, bool); | |
176 | static const char *xtensa_invalid_within_doloop (const rtx_insn *); | |
a1a79768 | 177 | |
d9886a9e | 178 | static bool xtensa_member_type_forces_blk (const_tree, |
ef4bddc2 | 179 | machine_mode mode); |
d9886a9e | 180 | |
590e2636 | 181 | static void xtensa_conditional_register_usage (void); |
c43f4279 | 182 | static unsigned int xtensa_hard_regno_nregs (unsigned int, machine_mode); |
f939c3e6 | 183 | static bool xtensa_hard_regno_mode_ok (unsigned int, machine_mode); |
99e1629f | 184 | static bool xtensa_modes_tieable_p (machine_mode, machine_mode); |
58e17cf8 | 185 | static HOST_WIDE_INT xtensa_constant_alignment (const_tree, HOST_WIDE_INT); |
2a31c321 | 186 | static HOST_WIDE_INT xtensa_starting_frame_offset (void); |
8c9ee176 | 187 | static unsigned HOST_WIDE_INT xtensa_asan_shadow_offset (void); |
03984308 | 188 | |
590e2636 | 189 | \f |
03984308 BW |
190 | |
191 | /* These hooks specify assembly directives for creating certain kinds | |
192 | of integer object. */ | |
193 | ||
194 | #undef TARGET_ASM_ALIGNED_SI_OP | |
195 | #define TARGET_ASM_ALIGNED_SI_OP "\t.word\t" | |
196 | ||
b64a1b53 RH |
197 | #undef TARGET_ASM_SELECT_RTX_SECTION |
198 | #define TARGET_ASM_SELECT_RTX_SECTION xtensa_select_rtx_section | |
03984308 | 199 | |
506d7b68 PB |
200 | #undef TARGET_LEGITIMIZE_ADDRESS |
201 | #define TARGET_LEGITIMIZE_ADDRESS xtensa_legitimize_address | |
a1a79768 AS |
202 | #undef TARGET_MODE_DEPENDENT_ADDRESS_P |
203 | #define TARGET_MODE_DEPENDENT_ADDRESS_P xtensa_mode_dependent_address_p | |
506d7b68 | 204 | |
5378dda2 AS |
205 | #undef TARGET_REGISTER_MOVE_COST |
206 | #define TARGET_REGISTER_MOVE_COST xtensa_register_move_cost | |
207 | #undef TARGET_MEMORY_MOVE_COST | |
208 | #define TARGET_MEMORY_MOVE_COST xtensa_memory_move_cost | |
3c50106f RH |
209 | #undef TARGET_RTX_COSTS |
210 | #define TARGET_RTX_COSTS xtensa_rtx_costs | |
dcefdf67 | 211 | #undef TARGET_ADDRESS_COST |
b413068c | 212 | #define TARGET_ADDRESS_COST hook_int_rtx_mode_as_bool_0 |
3c50106f | 213 | |
d9886a9e L |
214 | #undef TARGET_MEMBER_TYPE_FORCES_BLK |
215 | #define TARGET_MEMBER_TYPE_FORCES_BLK xtensa_member_type_forces_blk | |
216 | ||
c35d187f RH |
217 | #undef TARGET_BUILD_BUILTIN_VA_LIST |
218 | #define TARGET_BUILD_BUILTIN_VA_LIST xtensa_build_builtin_va_list | |
219 | ||
d7bd8aeb JJ |
220 | #undef TARGET_EXPAND_BUILTIN_VA_START |
221 | #define TARGET_EXPAND_BUILTIN_VA_START xtensa_va_start | |
222 | ||
cde0f3fd PB |
223 | #undef TARGET_PROMOTE_FUNCTION_MODE |
224 | #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote | |
4c45af42 | 225 | #undef TARGET_PROMOTE_PROTOTYPES |
586de218 | 226 | #define TARGET_PROMOTE_PROTOTYPES hook_bool_const_tree_true |
4c45af42 | 227 | |
4c45af42 KH |
228 | #undef TARGET_RETURN_IN_MEMORY |
229 | #define TARGET_RETURN_IN_MEMORY xtensa_return_in_memory | |
e2b2d01e AS |
230 | #undef TARGET_FUNCTION_VALUE |
231 | #define TARGET_FUNCTION_VALUE xtensa_function_value | |
dde8a3a4 AS |
232 | #undef TARGET_LIBCALL_VALUE |
233 | #define TARGET_LIBCALL_VALUE xtensa_libcall_value | |
234 | #undef TARGET_FUNCTION_VALUE_REGNO_P | |
235 | #define TARGET_FUNCTION_VALUE_REGNO_P xtensa_function_value_regno_p | |
236 | ||
42ba5130 | 237 | #undef TARGET_SPLIT_COMPLEX_ARG |
3101faab | 238 | #define TARGET_SPLIT_COMPLEX_ARG hook_bool_const_tree_true |
fe984136 RH |
239 | #undef TARGET_MUST_PASS_IN_STACK |
240 | #define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size | |
626a4b31 NF |
241 | #undef TARGET_FUNCTION_ARG_ADVANCE |
242 | #define TARGET_FUNCTION_ARG_ADVANCE xtensa_function_arg_advance | |
243 | #undef TARGET_FUNCTION_ARG | |
244 | #define TARGET_FUNCTION_ARG xtensa_function_arg | |
245 | #undef TARGET_FUNCTION_INCOMING_ARG | |
246 | #define TARGET_FUNCTION_INCOMING_ARG xtensa_function_incoming_arg | |
c2ed6cf8 NF |
247 | #undef TARGET_FUNCTION_ARG_BOUNDARY |
248 | #define TARGET_FUNCTION_ARG_BOUNDARY xtensa_function_arg_boundary | |
4c45af42 KH |
249 | |
250 | #undef TARGET_EXPAND_BUILTIN_SAVEREGS | |
251 | #define TARGET_EXPAND_BUILTIN_SAVEREGS xtensa_builtin_saveregs | |
85d53c1d RH |
252 | #undef TARGET_GIMPLIFY_VA_ARG_EXPR |
253 | #define TARGET_GIMPLIFY_VA_ARG_EXPR xtensa_gimplify_va_arg_expr | |
4c45af42 | 254 | |
6e5ff6e7 BW |
255 | #undef TARGET_RETURN_IN_MSB |
256 | #define TARGET_RETURN_IN_MSB xtensa_return_in_msb | |
257 | ||
09fa8841 BW |
258 | #undef TARGET_INIT_BUILTINS |
259 | #define TARGET_INIT_BUILTINS xtensa_init_builtins | |
260 | #undef TARGET_FOLD_BUILTIN | |
261 | #define TARGET_FOLD_BUILTIN xtensa_fold_builtin | |
262 | #undef TARGET_EXPAND_BUILTIN | |
263 | #define TARGET_EXPAND_BUILTIN xtensa_expand_builtin | |
264 | ||
a6e508f9 AS |
265 | #undef TARGET_PREFERRED_RELOAD_CLASS |
266 | #define TARGET_PREFERRED_RELOAD_CLASS xtensa_preferred_reload_class | |
267 | #undef TARGET_PREFERRED_OUTPUT_RELOAD_CLASS | |
268 | #define TARGET_PREFERRED_OUTPUT_RELOAD_CLASS xtensa_preferred_output_reload_class | |
269 | ||
37fbe8a3 BW |
270 | #undef TARGET_SECONDARY_RELOAD |
271 | #define TARGET_SECONDARY_RELOAD xtensa_secondary_reload | |
272 | ||
6a7a462c BW |
273 | #undef TARGET_HAVE_TLS |
274 | #define TARGET_HAVE_TLS (TARGET_THREADPTR && HAVE_AS_TLS) | |
275 | ||
276 | #undef TARGET_CANNOT_FORCE_CONST_MEM | |
fbbf66e7 | 277 | #define TARGET_CANNOT_FORCE_CONST_MEM xtensa_cannot_force_const_mem |
6a7a462c | 278 | |
d81db636 SB |
279 | #undef TARGET_LRA_P |
280 | #define TARGET_LRA_P hook_bool_void_false | |
281 | ||
c6c3dba9 PB |
282 | #undef TARGET_LEGITIMATE_ADDRESS_P |
283 | #define TARGET_LEGITIMATE_ADDRESS_P xtensa_legitimate_address_p | |
284 | ||
b52b1749 AS |
285 | #undef TARGET_FRAME_POINTER_REQUIRED |
286 | #define TARGET_FRAME_POINTER_REQUIRED xtensa_frame_pointer_required | |
287 | ||
2b4fa409 RH |
288 | #undef TARGET_STATIC_CHAIN |
289 | #define TARGET_STATIC_CHAIN xtensa_static_chain | |
3c1229cb RH |
290 | #undef TARGET_ASM_TRAMPOLINE_TEMPLATE |
291 | #define TARGET_ASM_TRAMPOLINE_TEMPLATE xtensa_asm_trampoline_template | |
292 | #undef TARGET_TRAMPOLINE_INIT | |
293 | #define TARGET_TRAMPOLINE_INIT xtensa_trampoline_init | |
294 | ||
c5387660 JM |
295 | #undef TARGET_OPTION_OVERRIDE |
296 | #define TARGET_OPTION_OVERRIDE xtensa_option_override | |
297 | ||
2ac6bb04 AS |
298 | #undef TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA |
299 | #define TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA xtensa_output_addr_const_extra | |
300 | ||
1a627b35 RS |
301 | #undef TARGET_LEGITIMATE_CONSTANT_P |
302 | #define TARGET_LEGITIMATE_CONSTANT_P xtensa_legitimate_constant_p | |
303 | ||
6383386a FY |
304 | #undef TARGET_MACHINE_DEPENDENT_REORG |
305 | #define TARGET_MACHINE_DEPENDENT_REORG xtensa_reorg | |
306 | ||
307 | #undef TARGET_CAN_USE_DOLOOP_P | |
308 | #define TARGET_CAN_USE_DOLOOP_P xtensa_can_use_doloop_p | |
309 | ||
310 | #undef TARGET_INVALID_WITHIN_DOLOOP | |
311 | #define TARGET_INVALID_WITHIN_DOLOOP xtensa_invalid_within_doloop | |
312 | ||
590e2636 MF |
313 | #undef TARGET_CONDITIONAL_REGISTER_USAGE |
314 | #define TARGET_CONDITIONAL_REGISTER_USAGE xtensa_conditional_register_usage | |
315 | ||
c43f4279 RS |
316 | #undef TARGET_HARD_REGNO_NREGS |
317 | #define TARGET_HARD_REGNO_NREGS xtensa_hard_regno_nregs | |
f939c3e6 RS |
318 | #undef TARGET_HARD_REGNO_MODE_OK |
319 | #define TARGET_HARD_REGNO_MODE_OK xtensa_hard_regno_mode_ok | |
320 | ||
99e1629f RS |
321 | #undef TARGET_MODES_TIEABLE_P |
322 | #define TARGET_MODES_TIEABLE_P xtensa_modes_tieable_p | |
323 | ||
58e17cf8 RS |
324 | #undef TARGET_CONSTANT_ALIGNMENT |
325 | #define TARGET_CONSTANT_ALIGNMENT xtensa_constant_alignment | |
326 | ||
2a31c321 RS |
327 | #undef TARGET_STARTING_FRAME_OFFSET |
328 | #define TARGET_STARTING_FRAME_OFFSET xtensa_starting_frame_offset | |
329 | ||
8c9ee176 MF |
330 | #undef TARGET_ASAN_SHADOW_OFFSET |
331 | #define TARGET_ASAN_SHADOW_OFFSET xtensa_asan_shadow_offset | |
332 | ||
c6579387 MF |
333 | #undef TARGET_HAVE_SPECULATION_SAFE_VALUE |
334 | #define TARGET_HAVE_SPECULATION_SAFE_VALUE speculation_safe_value_not_needed | |
335 | ||
b64a1b53 | 336 | struct gcc_target targetm = TARGET_INITIALIZER; |
03984308 | 337 | |
887af464 BW |
338 | \f |
339 | /* Functions to test Xtensa immediate operand validity. */ | |
03984308 | 340 | |
8eb1bc5c BW |
341 | bool |
342 | xtensa_simm8 (HOST_WIDE_INT v) | |
343 | { | |
344 | return v >= -128 && v <= 127; | |
345 | } | |
346 | ||
347 | ||
348 | bool | |
349 | xtensa_simm8x256 (HOST_WIDE_INT v) | |
350 | { | |
351 | return (v & 255) == 0 && (v >= -32768 && v <= 32512); | |
352 | } | |
353 | ||
354 | ||
355 | bool | |
356 | xtensa_simm12b (HOST_WIDE_INT v) | |
357 | { | |
358 | return v >= -2048 && v <= 2047; | |
359 | } | |
360 | ||
361 | ||
362 | static bool | |
363 | xtensa_uimm8 (HOST_WIDE_INT v) | |
364 | { | |
365 | return v >= 0 && v <= 255; | |
366 | } | |
367 | ||
368 | ||
369 | static bool | |
370 | xtensa_uimm8x2 (HOST_WIDE_INT v) | |
371 | { | |
372 | return (v & 1) == 0 && (v >= 0 && v <= 510); | |
373 | } | |
374 | ||
375 | ||
376 | static bool | |
377 | xtensa_uimm8x4 (HOST_WIDE_INT v) | |
378 | { | |
379 | return (v & 3) == 0 && (v >= 0 && v <= 1020); | |
380 | } | |
381 | ||
382 | ||
383 | static bool | |
384 | xtensa_b4const (HOST_WIDE_INT v) | |
03984308 BW |
385 | { |
386 | switch (v) | |
387 | { | |
8eb1bc5c BW |
388 | case -1: |
389 | case 1: | |
03984308 BW |
390 | case 2: |
391 | case 3: | |
392 | case 4: | |
393 | case 5: | |
394 | case 6: | |
395 | case 7: | |
396 | case 8: | |
397 | case 10: | |
398 | case 12: | |
399 | case 16: | |
400 | case 32: | |
401 | case 64: | |
402 | case 128: | |
403 | case 256: | |
8eb1bc5c | 404 | return true; |
03984308 | 405 | } |
8eb1bc5c | 406 | return false; |
03984308 BW |
407 | } |
408 | ||
03984308 | 409 | |
8eb1bc5c BW |
410 | bool |
411 | xtensa_b4const_or_zero (HOST_WIDE_INT v) | |
03984308 | 412 | { |
8eb1bc5c BW |
413 | if (v == 0) |
414 | return true; | |
415 | return xtensa_b4const (v); | |
03984308 BW |
416 | } |
417 | ||
03984308 | 418 | |
8eb1bc5c BW |
419 | bool |
420 | xtensa_b4constu (HOST_WIDE_INT v) | |
03984308 BW |
421 | { |
422 | switch (v) | |
423 | { | |
8eb1bc5c BW |
424 | case 32768: |
425 | case 65536: | |
03984308 BW |
426 | case 2: |
427 | case 3: | |
428 | case 4: | |
429 | case 5: | |
430 | case 6: | |
431 | case 7: | |
432 | case 8: | |
433 | case 10: | |
434 | case 12: | |
435 | case 16: | |
436 | case 32: | |
437 | case 64: | |
438 | case 128: | |
439 | case 256: | |
8eb1bc5c | 440 | return true; |
03984308 | 441 | } |
8eb1bc5c | 442 | return false; |
03984308 BW |
443 | } |
444 | ||
03984308 | 445 | |
8eb1bc5c BW |
446 | bool |
447 | xtensa_mask_immediate (HOST_WIDE_INT v) | |
03984308 | 448 | { |
8eb1bc5c BW |
449 | #define MAX_MASK_SIZE 16 |
450 | int mask_size; | |
03984308 | 451 | |
8eb1bc5c BW |
452 | for (mask_size = 1; mask_size <= MAX_MASK_SIZE; mask_size++) |
453 | { | |
454 | if ((v & 1) == 0) | |
455 | return false; | |
456 | v = v >> 1; | |
457 | if (v == 0) | |
458 | return true; | |
459 | } | |
03984308 | 460 | |
8eb1bc5c | 461 | return false; |
03984308 BW |
462 | } |
463 | ||
03984308 | 464 | |
03984308 | 465 | /* This is just like the standard true_regnum() function except that it |
638db43e | 466 | works even when reg_renumber is not initialized. */ |
03984308 BW |
467 | |
468 | int | |
ffbc8796 | 469 | xt_true_regnum (rtx x) |
03984308 BW |
470 | { |
471 | if (GET_CODE (x) == REG) | |
472 | { | |
473 | if (reg_renumber | |
474 | && REGNO (x) >= FIRST_PSEUDO_REGISTER | |
475 | && reg_renumber[REGNO (x)] >= 0) | |
476 | return reg_renumber[REGNO (x)]; | |
477 | return REGNO (x); | |
478 | } | |
479 | if (GET_CODE (x) == SUBREG) | |
480 | { | |
481 | int base = xt_true_regnum (SUBREG_REG (x)); | |
482 | if (base >= 0 && base < FIRST_PSEUDO_REGISTER) | |
483 | return base + subreg_regno_offset (REGNO (SUBREG_REG (x)), | |
484 | GET_MODE (SUBREG_REG (x)), | |
485 | SUBREG_BYTE (x), GET_MODE (x)); | |
486 | } | |
487 | return -1; | |
488 | } | |
489 | ||
490 | ||
03984308 | 491 | int |
ef4bddc2 | 492 | xtensa_valid_move (machine_mode mode, rtx *operands) |
03984308 | 493 | { |
a8cacfd2 BW |
494 | /* Either the destination or source must be a register, and the |
495 | MAC16 accumulator doesn't count. */ | |
496 | ||
497 | if (register_operand (operands[0], mode)) | |
498 | { | |
499 | int dst_regnum = xt_true_regnum (operands[0]); | |
500 | ||
a024f514 MF |
501 | if (xtensa_tls_referenced_p (operands[1])) |
502 | return FALSE; | |
503 | ||
638db43e | 504 | /* The stack pointer can only be assigned with a MOVSP opcode. */ |
a8cacfd2 | 505 | if (dst_regnum == STACK_POINTER_REGNUM) |
590e2636 MF |
506 | return !TARGET_WINDOWED_ABI |
507 | || (mode == SImode | |
508 | && register_operand (operands[1], mode) | |
509 | && !ACC_REG_P (xt_true_regnum (operands[1]))); | |
a8cacfd2 BW |
510 | |
511 | if (!ACC_REG_P (dst_regnum)) | |
512 | return true; | |
513 | } | |
3437320b | 514 | if (register_operand (operands[1], mode)) |
a8cacfd2 BW |
515 | { |
516 | int src_regnum = xt_true_regnum (operands[1]); | |
517 | if (!ACC_REG_P (src_regnum)) | |
518 | return true; | |
519 | } | |
03984308 BW |
520 | return FALSE; |
521 | } | |
522 | ||
523 | ||
03984308 | 524 | int |
ffbc8796 | 525 | smalloffset_mem_p (rtx op) |
03984308 BW |
526 | { |
527 | if (GET_CODE (op) == MEM) | |
528 | { | |
529 | rtx addr = XEXP (op, 0); | |
530 | if (GET_CODE (addr) == REG) | |
da1f39e4 | 531 | return BASE_REG_P (addr, 0); |
03984308 BW |
532 | if (GET_CODE (addr) == PLUS) |
533 | { | |
534 | rtx offset = XEXP (addr, 0); | |
8eb1bc5c | 535 | HOST_WIDE_INT val; |
03984308 BW |
536 | if (GET_CODE (offset) != CONST_INT) |
537 | offset = XEXP (addr, 1); | |
538 | if (GET_CODE (offset) != CONST_INT) | |
539 | return FALSE; | |
8eb1bc5c BW |
540 | |
541 | val = INTVAL (offset); | |
542 | return (val & 3) == 0 && (val >= 0 && val <= 60); | |
03984308 BW |
543 | } |
544 | } | |
545 | return FALSE; | |
546 | } | |
547 | ||
548 | ||
a1a79768 AS |
549 | static bool |
550 | constantpool_address_p (const_rtx addr) | |
03984308 | 551 | { |
a1a79768 | 552 | const_rtx sym = addr; |
03984308 BW |
553 | |
554 | if (GET_CODE (addr) == CONST) | |
555 | { | |
556 | rtx offset; | |
557 | ||
3bbc2af6 | 558 | /* Only handle (PLUS (SYM, OFFSET)) form. */ |
03984308 BW |
559 | addr = XEXP (addr, 0); |
560 | if (GET_CODE (addr) != PLUS) | |
a1a79768 | 561 | return false; |
03984308 | 562 | |
3bbc2af6 | 563 | /* Make sure the address is word aligned. */ |
03984308 | 564 | offset = XEXP (addr, 1); |
a1a79768 | 565 | if ((!CONST_INT_P (offset)) |
03984308 | 566 | || ((INTVAL (offset) & 3) != 0)) |
a1a79768 | 567 | return false; |
03984308 BW |
568 | |
569 | sym = XEXP (addr, 0); | |
570 | } | |
571 | ||
572 | if ((GET_CODE (sym) == SYMBOL_REF) | |
573 | && CONSTANT_POOL_ADDRESS_P (sym)) | |
a1a79768 AS |
574 | return true; |
575 | return false; | |
03984308 BW |
576 | } |
577 | ||
578 | ||
579 | int | |
ffbc8796 | 580 | constantpool_mem_p (rtx op) |
03984308 | 581 | { |
63694bdd BW |
582 | if (GET_CODE (op) == SUBREG) |
583 | op = SUBREG_REG (op); | |
03984308 BW |
584 | if (GET_CODE (op) == MEM) |
585 | return constantpool_address_p (XEXP (op, 0)); | |
586 | return FALSE; | |
587 | } | |
588 | ||
589 | ||
6a7a462c BW |
590 | /* Return TRUE if X is a thread-local symbol. */ |
591 | ||
592 | static bool | |
593 | xtensa_tls_symbol_p (rtx x) | |
594 | { | |
595 | if (! TARGET_HAVE_TLS) | |
596 | return false; | |
597 | ||
598 | return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0; | |
599 | } | |
600 | ||
601 | ||
03984308 | 602 | void |
ffbc8796 | 603 | xtensa_extend_reg (rtx dst, rtx src) |
03984308 BW |
604 | { |
605 | rtx temp = gen_reg_rtx (SImode); | |
606 | rtx shift = GEN_INT (BITS_PER_WORD - GET_MODE_BITSIZE (GET_MODE (src))); | |
607 | ||
3bbc2af6 | 608 | /* Generate paradoxical subregs as needed so that the modes match. */ |
03984308 BW |
609 | src = simplify_gen_subreg (SImode, src, GET_MODE (src), 0); |
610 | dst = simplify_gen_subreg (SImode, dst, GET_MODE (dst), 0); | |
611 | ||
612 | emit_insn (gen_ashlsi3 (temp, src, shift)); | |
613 | emit_insn (gen_ashrsi3 (dst, temp, shift)); | |
614 | } | |
615 | ||
616 | ||
8eb1bc5c | 617 | bool |
ef4bddc2 | 618 | xtensa_mem_offset (unsigned v, machine_mode mode) |
03984308 BW |
619 | { |
620 | switch (mode) | |
621 | { | |
4e10a5a7 | 622 | case E_BLKmode: |
03984308 BW |
623 | /* Handle the worst case for block moves. See xtensa_expand_block_move |
624 | where we emit an optimized block move operation if the block can be | |
625 | moved in < "move_ratio" pieces. The worst case is when the block is | |
626 | aligned but has a size of (3 mod 4) (does this happen?) so that the | |
638db43e | 627 | last piece requires a byte load/store. */ |
f42f5a1b BW |
628 | return (xtensa_uimm8 (v) |
629 | && xtensa_uimm8 (v + MOVE_MAX * LARGEST_MOVE_RATIO)); | |
03984308 | 630 | |
4e10a5a7 | 631 | case E_QImode: |
03984308 BW |
632 | return xtensa_uimm8 (v); |
633 | ||
4e10a5a7 | 634 | case E_HImode: |
03984308 BW |
635 | return xtensa_uimm8x2 (v); |
636 | ||
738ae6ee | 637 | case E_DImode: |
4e10a5a7 | 638 | case E_DFmode: |
03984308 BW |
639 | return (xtensa_uimm8x4 (v) && xtensa_uimm8x4 (v + 4)); |
640 | ||
641 | default: | |
642 | break; | |
643 | } | |
644 | ||
645 | return xtensa_uimm8x4 (v); | |
646 | } | |
647 | ||
648 | ||
ffbc8796 | 649 | /* Make normal rtx_code into something we can index from an array. */ |
03984308 BW |
650 | |
651 | static enum internal_test | |
ffbc8796 | 652 | map_test_to_internal_test (enum rtx_code test_code) |
03984308 BW |
653 | { |
654 | enum internal_test test = ITEST_MAX; | |
655 | ||
656 | switch (test_code) | |
657 | { | |
658 | default: break; | |
659 | case EQ: test = ITEST_EQ; break; | |
660 | case NE: test = ITEST_NE; break; | |
661 | case GT: test = ITEST_GT; break; | |
662 | case GE: test = ITEST_GE; break; | |
663 | case LT: test = ITEST_LT; break; | |
664 | case LE: test = ITEST_LE; break; | |
665 | case GTU: test = ITEST_GTU; break; | |
666 | case GEU: test = ITEST_GEU; break; | |
667 | case LTU: test = ITEST_LTU; break; | |
668 | case LEU: test = ITEST_LEU; break; | |
669 | } | |
670 | ||
671 | return test; | |
672 | } | |
673 | ||
674 | ||
675 | /* Generate the code to compare two integer values. The return value is | |
638db43e | 676 | the comparison expression. */ |
03984308 BW |
677 | |
678 | static rtx | |
ffbc8796 BW |
679 | gen_int_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
680 | rtx cmp0, /* first operand to compare */ | |
681 | rtx cmp1, /* second operand to compare */ | |
682 | int *p_invert /* whether branch needs to reverse test */) | |
03984308 | 683 | { |
ffbc8796 BW |
684 | struct cmp_info |
685 | { | |
03984308 | 686 | enum rtx_code test_code; /* test code to use in insn */ |
8eb1bc5c | 687 | bool (*const_range_p) (HOST_WIDE_INT); /* range check function */ |
03984308 BW |
688 | int const_add; /* constant to add (convert LE -> LT) */ |
689 | int reverse_regs; /* reverse registers in test */ | |
690 | int invert_const; /* != 0 if invert value if cmp1 is constant */ | |
691 | int invert_reg; /* != 0 if invert value if cmp1 is register */ | |
692 | int unsignedp; /* != 0 for unsigned comparisons. */ | |
693 | }; | |
694 | ||
695 | static struct cmp_info info[ (int)ITEST_MAX ] = { | |
696 | ||
8eb1bc5c BW |
697 | { EQ, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* EQ */ |
698 | { NE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* NE */ | |
03984308 | 699 | |
8eb1bc5c BW |
700 | { LT, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* GT */ |
701 | { GE, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* GE */ | |
702 | { LT, xtensa_b4const_or_zero, 0, 0, 0, 0, 0 }, /* LT */ | |
703 | { GE, xtensa_b4const_or_zero, 1, 1, 1, 0, 0 }, /* LE */ | |
03984308 BW |
704 | |
705 | { LTU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* GTU */ | |
706 | { GEU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* GEU */ | |
707 | { LTU, xtensa_b4constu, 0, 0, 0, 0, 1 }, /* LTU */ | |
708 | { GEU, xtensa_b4constu, 1, 1, 1, 0, 1 }, /* LEU */ | |
709 | }; | |
710 | ||
711 | enum internal_test test; | |
ef4bddc2 | 712 | machine_mode mode; |
03984308 BW |
713 | struct cmp_info *p_info; |
714 | ||
715 | test = map_test_to_internal_test (test_code); | |
177b6be0 | 716 | gcc_assert (test != ITEST_MAX); |
03984308 BW |
717 | |
718 | p_info = &info[ (int)test ]; | |
719 | ||
720 | mode = GET_MODE (cmp0); | |
721 | if (mode == VOIDmode) | |
722 | mode = GET_MODE (cmp1); | |
723 | ||
724 | /* Make sure we can handle any constants given to us. */ | |
725 | if (GET_CODE (cmp1) == CONST_INT) | |
726 | { | |
727 | HOST_WIDE_INT value = INTVAL (cmp1); | |
728 | unsigned HOST_WIDE_INT uvalue = (unsigned HOST_WIDE_INT)value; | |
729 | ||
730 | /* if the immediate overflows or does not fit in the immediate field, | |
731 | spill it to a register */ | |
732 | ||
733 | if ((p_info->unsignedp ? | |
734 | (uvalue + p_info->const_add > uvalue) : | |
735 | (value + p_info->const_add > value)) != (p_info->const_add > 0)) | |
736 | { | |
737 | cmp1 = force_reg (mode, cmp1); | |
738 | } | |
739 | else if (!(p_info->const_range_p) (value + p_info->const_add)) | |
740 | { | |
741 | cmp1 = force_reg (mode, cmp1); | |
742 | } | |
743 | } | |
744 | else if ((GET_CODE (cmp1) != REG) && (GET_CODE (cmp1) != SUBREG)) | |
745 | { | |
746 | cmp1 = force_reg (mode, cmp1); | |
747 | } | |
748 | ||
749 | /* See if we need to invert the result. */ | |
750 | *p_invert = ((GET_CODE (cmp1) == CONST_INT) | |
751 | ? p_info->invert_const | |
752 | : p_info->invert_reg); | |
753 | ||
754 | /* Comparison to constants, may involve adding 1 to change a LT into LE. | |
755 | Comparison between two registers, may involve switching operands. */ | |
756 | if (GET_CODE (cmp1) == CONST_INT) | |
757 | { | |
758 | if (p_info->const_add != 0) | |
759 | cmp1 = GEN_INT (INTVAL (cmp1) + p_info->const_add); | |
760 | ||
761 | } | |
762 | else if (p_info->reverse_regs) | |
763 | { | |
764 | rtx temp = cmp0; | |
765 | cmp0 = cmp1; | |
766 | cmp1 = temp; | |
767 | } | |
768 | ||
1c563bed | 769 | return gen_rtx_fmt_ee (p_info->test_code, VOIDmode, cmp0, cmp1); |
03984308 BW |
770 | } |
771 | ||
772 | ||
773 | /* Generate the code to compare two float values. The return value is | |
638db43e | 774 | the comparison expression. */ |
03984308 BW |
775 | |
776 | static rtx | |
ffbc8796 BW |
777 | gen_float_relational (enum rtx_code test_code, /* relational test (EQ, etc) */ |
778 | rtx cmp0, /* first operand to compare */ | |
779 | rtx cmp1 /* second operand to compare */) | |
03984308 | 780 | { |
ffbc8796 | 781 | rtx (*gen_fn) (rtx, rtx, rtx); |
03984308 BW |
782 | rtx brtmp; |
783 | int reverse_regs, invert; | |
784 | ||
785 | switch (test_code) | |
786 | { | |
787 | case EQ: reverse_regs = 0; invert = 0; gen_fn = gen_seq_sf; break; | |
788 | case NE: reverse_regs = 0; invert = 1; gen_fn = gen_seq_sf; break; | |
789 | case LE: reverse_regs = 0; invert = 0; gen_fn = gen_sle_sf; break; | |
790 | case GT: reverse_regs = 1; invert = 0; gen_fn = gen_slt_sf; break; | |
791 | case LT: reverse_regs = 0; invert = 0; gen_fn = gen_slt_sf; break; | |
792 | case GE: reverse_regs = 1; invert = 0; gen_fn = gen_sle_sf; break; | |
ff779f98 BW |
793 | case UNEQ: reverse_regs = 0; invert = 0; gen_fn = gen_suneq_sf; break; |
794 | case LTGT: reverse_regs = 0; invert = 1; gen_fn = gen_suneq_sf; break; | |
795 | case UNLE: reverse_regs = 0; invert = 0; gen_fn = gen_sunle_sf; break; | |
796 | case UNGT: reverse_regs = 1; invert = 0; gen_fn = gen_sunlt_sf; break; | |
797 | case UNLT: reverse_regs = 0; invert = 0; gen_fn = gen_sunlt_sf; break; | |
798 | case UNGE: reverse_regs = 1; invert = 0; gen_fn = gen_sunle_sf; break; | |
799 | case UNORDERED: | |
800 | reverse_regs = 0; invert = 0; gen_fn = gen_sunordered_sf; break; | |
801 | case ORDERED: | |
802 | reverse_regs = 0; invert = 1; gen_fn = gen_sunordered_sf; break; | |
633e4eb4 | 803 | default: |
1c563bed | 804 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 BW |
805 | reverse_regs = 0; invert = 0; gen_fn = 0; /* avoid compiler warnings */ |
806 | } | |
807 | ||
808 | if (reverse_regs) | |
809 | { | |
810 | rtx temp = cmp0; | |
811 | cmp0 = cmp1; | |
812 | cmp1 = temp; | |
813 | } | |
814 | ||
815 | brtmp = gen_rtx_REG (CCmode, FPCC_REGNUM); | |
816 | emit_insn (gen_fn (brtmp, cmp0, cmp1)); | |
817 | ||
1c563bed | 818 | return gen_rtx_fmt_ee (invert ? EQ : NE, VOIDmode, brtmp, const0_rtx); |
03984308 BW |
819 | } |
820 | ||
821 | ||
822 | void | |
ef4bddc2 | 823 | xtensa_expand_conditional_branch (rtx *operands, machine_mode mode) |
03984308 | 824 | { |
f90b7a5a PB |
825 | enum rtx_code test_code = GET_CODE (operands[0]); |
826 | rtx cmp0 = operands[1]; | |
827 | rtx cmp1 = operands[2]; | |
03984308 BW |
828 | rtx cmp; |
829 | int invert; | |
830 | rtx label1, label2; | |
831 | ||
f90b7a5a | 832 | switch (mode) |
03984308 | 833 | { |
4e10a5a7 | 834 | case E_DFmode: |
03984308 | 835 | default: |
1c563bed | 836 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, cmp0, cmp1)); |
03984308 | 837 | |
4e10a5a7 | 838 | case E_SImode: |
03984308 BW |
839 | invert = FALSE; |
840 | cmp = gen_int_relational (test_code, cmp0, cmp1, &invert); | |
841 | break; | |
842 | ||
4e10a5a7 | 843 | case E_SFmode: |
03984308 | 844 | if (!TARGET_HARD_FLOAT) |
da1f39e4 BW |
845 | fatal_insn ("bad test", gen_rtx_fmt_ee (test_code, VOIDmode, |
846 | cmp0, cmp1)); | |
03984308 BW |
847 | invert = FALSE; |
848 | cmp = gen_float_relational (test_code, cmp0, cmp1); | |
849 | break; | |
850 | } | |
851 | ||
852 | /* Generate the branch. */ | |
853 | ||
f90b7a5a | 854 | label1 = gen_rtx_LABEL_REF (VOIDmode, operands[3]); |
03984308 BW |
855 | label2 = pc_rtx; |
856 | ||
857 | if (invert) | |
858 | { | |
859 | label2 = label1; | |
860 | label1 = pc_rtx; | |
861 | } | |
862 | ||
f7df4a84 | 863 | emit_jump_insn (gen_rtx_SET (pc_rtx, |
03984308 BW |
864 | gen_rtx_IF_THEN_ELSE (VOIDmode, cmp, |
865 | label1, | |
866 | label2))); | |
867 | } | |
868 | ||
869 | ||
870 | static rtx | |
ef4bddc2 | 871 | gen_conditional_move (enum rtx_code code, machine_mode mode, |
f90b7a5a | 872 | rtx op0, rtx op1) |
03984308 | 873 | { |
f90b7a5a | 874 | if (mode == SImode) |
03984308 | 875 | { |
f90b7a5a PB |
876 | rtx cmp; |
877 | ||
03984308 BW |
878 | /* Jump optimization calls get_condition() which canonicalizes |
879 | comparisons like (GE x <const>) to (GT x <const-1>). | |
880 | Transform those comparisons back to GE, since that is the | |
881 | comparison supported in Xtensa. We shouldn't have to | |
882 | transform <LE x const> comparisons, because neither | |
883 | xtensa_expand_conditional_branch() nor get_condition() will | |
638db43e | 884 | produce them. */ |
03984308 BW |
885 | |
886 | if ((code == GT) && (op1 == constm1_rtx)) | |
887 | { | |
888 | code = GE; | |
889 | op1 = const0_rtx; | |
890 | } | |
1c563bed | 891 | cmp = gen_rtx_fmt_ee (code, VOIDmode, cc0_rtx, const0_rtx); |
03984308 BW |
892 | |
893 | if (boolean_operator (cmp, VOIDmode)) | |
894 | { | |
3bbc2af6 | 895 | /* Swap the operands to make const0 second. */ |
03984308 BW |
896 | if (op0 == const0_rtx) |
897 | { | |
898 | op0 = op1; | |
899 | op1 = const0_rtx; | |
900 | } | |
901 | ||
3bbc2af6 | 902 | /* If not comparing against zero, emit a comparison (subtract). */ |
03984308 BW |
903 | if (op1 != const0_rtx) |
904 | { | |
905 | op0 = expand_binop (SImode, sub_optab, op0, op1, | |
906 | 0, 0, OPTAB_LIB_WIDEN); | |
907 | op1 = const0_rtx; | |
908 | } | |
909 | } | |
910 | else if (branch_operator (cmp, VOIDmode)) | |
911 | { | |
3bbc2af6 | 912 | /* Swap the operands to make const0 second. */ |
03984308 BW |
913 | if (op0 == const0_rtx) |
914 | { | |
915 | op0 = op1; | |
916 | op1 = const0_rtx; | |
917 | ||
918 | switch (code) | |
919 | { | |
920 | case LT: code = GE; break; | |
921 | case GE: code = LT; break; | |
177b6be0 | 922 | default: gcc_unreachable (); |
03984308 BW |
923 | } |
924 | } | |
925 | ||
926 | if (op1 != const0_rtx) | |
927 | return 0; | |
928 | } | |
929 | else | |
930 | return 0; | |
931 | ||
1c563bed | 932 | return gen_rtx_fmt_ee (code, VOIDmode, op0, op1); |
03984308 BW |
933 | } |
934 | ||
f90b7a5a | 935 | if (TARGET_HARD_FLOAT && mode == SFmode) |
03984308 BW |
936 | return gen_float_relational (code, op0, op1); |
937 | ||
938 | return 0; | |
939 | } | |
940 | ||
941 | ||
942 | int | |
ffbc8796 | 943 | xtensa_expand_conditional_move (rtx *operands, int isflt) |
03984308 | 944 | { |
f90b7a5a PB |
945 | rtx dest = operands[0]; |
946 | rtx cmp = operands[1]; | |
ef4bddc2 | 947 | machine_mode cmp_mode = GET_MODE (XEXP (cmp, 0)); |
ffbc8796 | 948 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 949 | |
f90b7a5a PB |
950 | if (!(cmp = gen_conditional_move (GET_CODE (cmp), cmp_mode, |
951 | XEXP (cmp, 0), XEXP (cmp, 1)))) | |
03984308 BW |
952 | return 0; |
953 | ||
954 | if (isflt) | |
f90b7a5a | 955 | gen_fn = (cmp_mode == SImode |
03984308 BW |
956 | ? gen_movsfcc_internal0 |
957 | : gen_movsfcc_internal1); | |
958 | else | |
f90b7a5a | 959 | gen_fn = (cmp_mode == SImode |
03984308 BW |
960 | ? gen_movsicc_internal0 |
961 | : gen_movsicc_internal1); | |
962 | ||
f90b7a5a | 963 | emit_insn (gen_fn (dest, XEXP (cmp, 0), operands[2], operands[3], cmp)); |
03984308 BW |
964 | return 1; |
965 | } | |
966 | ||
967 | ||
968 | int | |
ef4bddc2 | 969 | xtensa_expand_scc (rtx operands[4], machine_mode cmp_mode) |
03984308 BW |
970 | { |
971 | rtx dest = operands[0]; | |
f90b7a5a | 972 | rtx cmp; |
03984308 | 973 | rtx one_tmp, zero_tmp; |
ffbc8796 | 974 | rtx (*gen_fn) (rtx, rtx, rtx, rtx, rtx); |
03984308 | 975 | |
f90b7a5a PB |
976 | if (!(cmp = gen_conditional_move (GET_CODE (operands[1]), cmp_mode, |
977 | operands[2], operands[3]))) | |
03984308 BW |
978 | return 0; |
979 | ||
980 | one_tmp = gen_reg_rtx (SImode); | |
981 | zero_tmp = gen_reg_rtx (SImode); | |
982 | emit_insn (gen_movsi (one_tmp, const_true_rtx)); | |
983 | emit_insn (gen_movsi (zero_tmp, const0_rtx)); | |
984 | ||
f90b7a5a | 985 | gen_fn = (cmp_mode == SImode |
03984308 BW |
986 | ? gen_movsicc_internal0 |
987 | : gen_movsicc_internal1); | |
988 | emit_insn (gen_fn (dest, XEXP (cmp, 0), one_tmp, zero_tmp, cmp)); | |
989 | return 1; | |
990 | } | |
991 | ||
992 | ||
633e4eb4 BW |
993 | /* Split OP[1] into OP[2,3] and likewise for OP[0] into OP[0,1]. MODE is |
994 | for the output, i.e., the input operands are twice as big as MODE. */ | |
995 | ||
996 | void | |
ef4bddc2 | 997 | xtensa_split_operand_pair (rtx operands[4], machine_mode mode) |
633e4eb4 BW |
998 | { |
999 | switch (GET_CODE (operands[1])) | |
1000 | { | |
1001 | case REG: | |
1002 | operands[3] = gen_rtx_REG (mode, REGNO (operands[1]) + 1); | |
1003 | operands[2] = gen_rtx_REG (mode, REGNO (operands[1])); | |
1004 | break; | |
1005 | ||
1006 | case MEM: | |
1007 | operands[3] = adjust_address (operands[1], mode, GET_MODE_SIZE (mode)); | |
1008 | operands[2] = adjust_address (operands[1], mode, 0); | |
1009 | break; | |
1010 | ||
1011 | case CONST_INT: | |
1012 | case CONST_DOUBLE: | |
1013 | split_double (operands[1], &operands[2], &operands[3]); | |
1014 | break; | |
1015 | ||
1016 | default: | |
177b6be0 | 1017 | gcc_unreachable (); |
633e4eb4 BW |
1018 | } |
1019 | ||
1020 | switch (GET_CODE (operands[0])) | |
1021 | { | |
1022 | case REG: | |
1023 | operands[1] = gen_rtx_REG (mode, REGNO (operands[0]) + 1); | |
1024 | operands[0] = gen_rtx_REG (mode, REGNO (operands[0])); | |
1025 | break; | |
1026 | ||
1027 | case MEM: | |
1028 | operands[1] = adjust_address (operands[0], mode, GET_MODE_SIZE (mode)); | |
1029 | operands[0] = adjust_address (operands[0], mode, 0); | |
1030 | break; | |
1031 | ||
1032 | default: | |
177b6be0 | 1033 | gcc_unreachable (); |
633e4eb4 BW |
1034 | } |
1035 | } | |
1036 | ||
1037 | ||
03984308 | 1038 | /* Emit insns to move operands[1] into operands[0]. |
03984308 BW |
1039 | Return 1 if we have written out everything that needs to be done to |
1040 | do the move. Otherwise, return 0 and the caller will emit the move | |
1041 | normally. */ | |
1042 | ||
1043 | int | |
ef4bddc2 | 1044 | xtensa_emit_move_sequence (rtx *operands, machine_mode mode) |
03984308 | 1045 | { |
6a7a462c BW |
1046 | rtx src = operands[1]; |
1047 | ||
1048 | if (CONSTANT_P (src) | |
1049 | && (GET_CODE (src) != CONST_INT || ! xtensa_simm12b (INTVAL (src)))) | |
03984308 | 1050 | { |
6a7a462c BW |
1051 | rtx dst = operands[0]; |
1052 | ||
1053 | if (xtensa_tls_referenced_p (src)) | |
1054 | { | |
1055 | rtx addend = NULL; | |
1056 | ||
1057 | if (GET_CODE (src) == CONST && GET_CODE (XEXP (src, 0)) == PLUS) | |
1058 | { | |
1059 | addend = XEXP (XEXP (src, 0), 1); | |
1060 | src = XEXP (XEXP (src, 0), 0); | |
1061 | } | |
1062 | ||
1063 | src = xtensa_legitimize_tls_address (src); | |
1064 | if (addend) | |
1065 | { | |
1066 | src = gen_rtx_PLUS (mode, src, addend); | |
1067 | src = force_operand (src, dst); | |
1068 | } | |
1069 | emit_move_insn (dst, src); | |
1070 | return 1; | |
1071 | } | |
1072 | ||
a024f514 | 1073 | if (! TARGET_AUTO_LITPOOLS && ! TARGET_CONST16) |
6a7a462c BW |
1074 | { |
1075 | src = force_const_mem (SImode, src); | |
1076 | operands[1] = src; | |
1077 | } | |
f42f5a1b BW |
1078 | |
1079 | /* PC-relative loads are always SImode, and CONST16 is only | |
1080 | supported in the movsi pattern, so add a SUBREG for any other | |
1081 | (smaller) mode. */ | |
1082 | ||
1083 | if (mode != SImode) | |
1084 | { | |
6a7a462c | 1085 | if (register_operand (dst, mode)) |
f42f5a1b | 1086 | { |
6a7a462c | 1087 | emit_move_insn (simplify_gen_subreg (SImode, dst, mode, 0), src); |
f42f5a1b BW |
1088 | return 1; |
1089 | } | |
1090 | else | |
1091 | { | |
6a7a462c BW |
1092 | src = force_reg (SImode, src); |
1093 | src = gen_lowpart_SUBREG (mode, src); | |
1094 | operands[1] = src; | |
f42f5a1b BW |
1095 | } |
1096 | } | |
03984308 BW |
1097 | } |
1098 | ||
997b8b4d BW |
1099 | if (!(reload_in_progress | reload_completed) |
1100 | && !xtensa_valid_move (mode, operands)) | |
1101 | operands[1] = force_reg (mode, operands[1]); | |
03984308 | 1102 | |
997b8b4d | 1103 | operands[1] = xtensa_copy_incoming_a7 (operands[1]); |
03984308 BW |
1104 | |
1105 | /* During reload we don't want to emit (subreg:X (mem:Y)) since that | |
638db43e BW |
1106 | instruction won't be recognized after reload, so we remove the |
1107 | subreg and adjust mem accordingly. */ | |
03984308 BW |
1108 | if (reload_in_progress) |
1109 | { | |
1110 | operands[0] = fixup_subreg_mem (operands[0]); | |
1111 | operands[1] = fixup_subreg_mem (operands[1]); | |
1112 | } | |
1113 | return 0; | |
1114 | } | |
1115 | ||
f42f5a1b | 1116 | |
03984308 | 1117 | static rtx |
ffbc8796 | 1118 | fixup_subreg_mem (rtx x) |
03984308 BW |
1119 | { |
1120 | if (GET_CODE (x) == SUBREG | |
1121 | && GET_CODE (SUBREG_REG (x)) == REG | |
1122 | && REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER) | |
1123 | { | |
1124 | rtx temp = | |
1125 | gen_rtx_SUBREG (GET_MODE (x), | |
f2034d06 | 1126 | reg_equiv_mem (REGNO (SUBREG_REG (x))), |
03984308 | 1127 | SUBREG_BYTE (x)); |
55a2c322 | 1128 | x = alter_subreg (&temp, true); |
03984308 BW |
1129 | } |
1130 | return x; | |
1131 | } | |
1132 | ||
1133 | ||
997b8b4d BW |
1134 | /* Check if an incoming argument in a7 is expected to be used soon and |
1135 | if OPND is a register or register pair that includes a7. If so, | |
1136 | create a new pseudo and copy a7 into that pseudo at the very | |
1137 | beginning of the function, followed by the special "set_frame_ptr" | |
1138 | unspec_volatile insn. The return value is either the original | |
1139 | operand, if it is not a7, or the new pseudo containing a copy of | |
1140 | the incoming argument. This is necessary because the register | |
1141 | allocator will ignore conflicts with a7 and may either assign some | |
1142 | other pseudo to a7 or use a7 as the hard_frame_pointer, clobbering | |
1143 | the incoming argument in a7. By copying the argument out of a7 as | |
1144 | the very first thing, and then immediately following that with an | |
1145 | unspec_volatile to keep the scheduler away, we should avoid any | |
1146 | problems. Putting the set_frame_ptr insn at the beginning, with | |
1147 | only the a7 copy before it, also makes it easier for the prologue | |
1148 | expander to initialize the frame pointer after the a7 copy and to | |
1149 | fix up the a7 copy to use the stack pointer instead of the frame | |
1150 | pointer. */ | |
58db834b | 1151 | |
997b8b4d BW |
1152 | rtx |
1153 | xtensa_copy_incoming_a7 (rtx opnd) | |
58db834b | 1154 | { |
997b8b4d BW |
1155 | rtx entry_insns = 0; |
1156 | rtx reg, tmp; | |
ef4bddc2 | 1157 | machine_mode mode; |
997b8b4d BW |
1158 | |
1159 | if (!cfun->machine->need_a7_copy) | |
1160 | return opnd; | |
1161 | ||
1162 | /* This function should never be called again once a7 has been copied. */ | |
177b6be0 | 1163 | gcc_assert (!cfun->machine->set_frame_ptr_insn); |
997b8b4d BW |
1164 | |
1165 | mode = GET_MODE (opnd); | |
1166 | ||
1167 | /* The operand using a7 may come in a later instruction, so just return | |
1168 | the original operand if it doesn't use a7. */ | |
1169 | reg = opnd; | |
1170 | if (GET_CODE (reg) == SUBREG) | |
58db834b | 1171 | { |
177b6be0 | 1172 | gcc_assert (SUBREG_BYTE (reg) == 0); |
997b8b4d BW |
1173 | reg = SUBREG_REG (reg); |
1174 | } | |
1175 | if (GET_CODE (reg) != REG | |
1176 | || REGNO (reg) > A7_REG | |
a93072ca | 1177 | || REGNO (reg) + hard_regno_nregs (A7_REG, mode) <= A7_REG) |
997b8b4d | 1178 | return opnd; |
e6aecf8e | 1179 | |
997b8b4d | 1180 | /* 1-word args will always be in a7; 2-word args in a6/a7. */ |
a93072ca | 1181 | gcc_assert (REGNO (reg) + hard_regno_nregs (A7_REG, mode) - 1 == A7_REG); |
58db834b | 1182 | |
997b8b4d | 1183 | cfun->machine->need_a7_copy = false; |
58db834b | 1184 | |
997b8b4d BW |
1185 | /* Copy a7 to a new pseudo at the function entry. Use gen_raw_REG to |
1186 | create the REG for a7 so that hard_frame_pointer_rtx is not used. */ | |
58db834b | 1187 | |
0d8442b8 | 1188 | start_sequence (); |
997b8b4d | 1189 | tmp = gen_reg_rtx (mode); |
58db834b | 1190 | |
997b8b4d BW |
1191 | switch (mode) |
1192 | { | |
4e10a5a7 RS |
1193 | case E_DFmode: |
1194 | case E_DImode: | |
b412869c BW |
1195 | /* Copy the value out of A7 here but keep the first word in A6 until |
1196 | after the set_frame_ptr insn. Otherwise, the register allocator | |
1197 | may decide to put "subreg (tmp, 0)" in A7 and clobber the incoming | |
1198 | value. */ | |
997b8b4d BW |
1199 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 4), |
1200 | gen_raw_REG (SImode, A7_REG))); | |
1201 | break; | |
4e10a5a7 | 1202 | case E_SFmode: |
997b8b4d BW |
1203 | emit_insn (gen_movsf_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1204 | break; | |
4e10a5a7 | 1205 | case E_SImode: |
997b8b4d BW |
1206 | emit_insn (gen_movsi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1207 | break; | |
4e10a5a7 | 1208 | case E_HImode: |
997b8b4d BW |
1209 | emit_insn (gen_movhi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1210 | break; | |
4e10a5a7 | 1211 | case E_QImode: |
997b8b4d BW |
1212 | emit_insn (gen_movqi_internal (tmp, gen_raw_REG (mode, A7_REG))); |
1213 | break; | |
1214 | default: | |
177b6be0 | 1215 | gcc_unreachable (); |
58db834b BW |
1216 | } |
1217 | ||
997b8b4d | 1218 | cfun->machine->set_frame_ptr_insn = emit_insn (gen_set_frame_ptr ()); |
b412869c BW |
1219 | |
1220 | /* For DF and DI mode arguments, copy the incoming value in A6 now. */ | |
1221 | if (mode == DFmode || mode == DImode) | |
1222 | emit_insn (gen_movsi_internal (gen_rtx_SUBREG (SImode, tmp, 0), | |
1223 | gen_rtx_REG (SImode, A7_REG - 1))); | |
997b8b4d BW |
1224 | entry_insns = get_insns (); |
1225 | end_sequence (); | |
1226 | ||
1227 | if (cfun->machine->vararg_a7) | |
1228 | { | |
0d8442b8 BW |
1229 | /* This is called from within builtin_saveregs, which will insert the |
1230 | saveregs code at the function entry, ahead of anything placed at | |
1231 | the function entry now. Instead, save the sequence to be inserted | |
1232 | at the beginning of the saveregs code. */ | |
1233 | cfun->machine->vararg_a7_copy = entry_insns; | |
997b8b4d BW |
1234 | } |
1235 | else | |
1236 | { | |
1237 | /* Put entry_insns after the NOTE that starts the function. If | |
1238 | this is inside a start_sequence, make the outer-level insn | |
1239 | chain current, so the code is placed at the start of the | |
1240 | function. */ | |
1241 | push_topmost_sequence (); | |
0d8442b8 BW |
1242 | /* Do not use entry_of_function() here. This is called from within |
1243 | expand_function_start, when the CFG still holds GIMPLE. */ | |
997b8b4d BW |
1244 | emit_insn_after (entry_insns, get_insns ()); |
1245 | pop_topmost_sequence (); | |
1246 | } | |
1247 | ||
1248 | return tmp; | |
58db834b BW |
1249 | } |
1250 | ||
1251 | ||
a46bbb5a BW |
1252 | /* Try to expand a block move operation to a sequence of RTL move |
1253 | instructions. If not optimizing, or if the block size is not a | |
1254 | constant, or if the block is too large, the expansion fails and GCC | |
1255 | falls back to calling memcpy(). | |
03984308 BW |
1256 | |
1257 | operands[0] is the destination | |
1258 | operands[1] is the source | |
1259 | operands[2] is the length | |
1260 | operands[3] is the alignment */ | |
1261 | ||
1262 | int | |
ffbc8796 | 1263 | xtensa_expand_block_move (rtx *operands) |
03984308 | 1264 | { |
ef4bddc2 | 1265 | static const machine_mode mode_from_align[] = |
7eda7cda RH |
1266 | { |
1267 | VOIDmode, QImode, HImode, VOIDmode, SImode, | |
1268 | }; | |
1269 | ||
1270 | rtx dst_mem = operands[0]; | |
1271 | rtx src_mem = operands[1]; | |
1272 | HOST_WIDE_INT bytes, align; | |
03984308 | 1273 | int num_pieces, move_ratio; |
7eda7cda | 1274 | rtx temp[2]; |
ef4bddc2 | 1275 | machine_mode mode[2]; |
7eda7cda RH |
1276 | int amount[2]; |
1277 | bool active[2]; | |
1278 | int phase = 0; | |
1279 | int next; | |
1280 | int offset_ld = 0; | |
1281 | int offset_st = 0; | |
1282 | rtx x; | |
03984308 | 1283 | |
3bbc2af6 | 1284 | /* If this is not a fixed size move, just call memcpy. */ |
03984308 BW |
1285 | if (!optimize || (GET_CODE (operands[2]) != CONST_INT)) |
1286 | return 0; | |
1287 | ||
7eda7cda RH |
1288 | bytes = INTVAL (operands[2]); |
1289 | align = INTVAL (operands[3]); | |
1290 | ||
3bbc2af6 | 1291 | /* Anything to move? */ |
03984308 | 1292 | if (bytes <= 0) |
7eda7cda | 1293 | return 0; |
03984308 BW |
1294 | |
1295 | if (align > MOVE_MAX) | |
1296 | align = MOVE_MAX; | |
1297 | ||
3bbc2af6 | 1298 | /* Decide whether to expand inline based on the optimization level. */ |
03984308 BW |
1299 | move_ratio = 4; |
1300 | if (optimize > 2) | |
1301 | move_ratio = LARGEST_MOVE_RATIO; | |
3bbc2af6 | 1302 | num_pieces = (bytes / align) + (bytes % align); /* Close enough anyway. */ |
7eda7cda | 1303 | if (num_pieces > move_ratio) |
03984308 BW |
1304 | return 0; |
1305 | ||
7eda7cda RH |
1306 | x = XEXP (dst_mem, 0); |
1307 | if (!REG_P (x)) | |
1308 | { | |
1309 | x = force_reg (Pmode, x); | |
1310 | dst_mem = replace_equiv_address (dst_mem, x); | |
1311 | } | |
03984308 | 1312 | |
7eda7cda RH |
1313 | x = XEXP (src_mem, 0); |
1314 | if (!REG_P (x)) | |
1315 | { | |
1316 | x = force_reg (Pmode, x); | |
1317 | src_mem = replace_equiv_address (src_mem, x); | |
1318 | } | |
03984308 | 1319 | |
7eda7cda | 1320 | active[0] = active[1] = false; |
03984308 | 1321 | |
7eda7cda | 1322 | do |
03984308 | 1323 | { |
7eda7cda RH |
1324 | next = phase; |
1325 | phase ^= 1; | |
03984308 | 1326 | |
7eda7cda | 1327 | if (bytes > 0) |
03984308 | 1328 | { |
7eda7cda | 1329 | int next_amount; |
03984308 | 1330 | |
7eda7cda RH |
1331 | next_amount = (bytes >= 4 ? 4 : (bytes >= 2 ? 2 : 1)); |
1332 | next_amount = MIN (next_amount, align); | |
03984308 | 1333 | |
7eda7cda RH |
1334 | amount[next] = next_amount; |
1335 | mode[next] = mode_from_align[next_amount]; | |
1336 | temp[next] = gen_reg_rtx (mode[next]); | |
03984308 | 1337 | |
7eda7cda | 1338 | x = adjust_address (src_mem, mode[next], offset_ld); |
f7df4a84 | 1339 | emit_insn (gen_rtx_SET (temp[next], x)); |
03984308 | 1340 | |
7eda7cda RH |
1341 | offset_ld += next_amount; |
1342 | bytes -= next_amount; | |
1343 | active[next] = true; | |
1344 | } | |
03984308 | 1345 | |
7eda7cda RH |
1346 | if (active[phase]) |
1347 | { | |
1348 | active[phase] = false; | |
1349 | ||
1350 | x = adjust_address (dst_mem, mode[phase], offset_st); | |
f7df4a84 | 1351 | emit_insn (gen_rtx_SET (x, temp[phase])); |
03984308 | 1352 | |
7eda7cda RH |
1353 | offset_st += amount[phase]; |
1354 | } | |
03984308 | 1355 | } |
7eda7cda | 1356 | while (active[next]); |
03984308 | 1357 | |
7eda7cda | 1358 | return 1; |
03984308 BW |
1359 | } |
1360 | ||
1361 | ||
1362 | void | |
ffbc8796 | 1363 | xtensa_expand_nonlocal_goto (rtx *operands) |
03984308 BW |
1364 | { |
1365 | rtx goto_handler = operands[1]; | |
1366 | rtx containing_fp = operands[3]; | |
1367 | ||
3bbc2af6 KH |
1368 | /* Generate a call to "__xtensa_nonlocal_goto" (in libgcc); the code |
1369 | is too big to generate in-line. */ | |
03984308 BW |
1370 | |
1371 | if (GET_CODE (containing_fp) != REG) | |
1372 | containing_fp = force_reg (Pmode, containing_fp); | |
1373 | ||
03984308 | 1374 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_nonlocal_goto"), |
db69559b | 1375 | LCT_NORMAL, VOIDmode, |
03984308 BW |
1376 | containing_fp, Pmode, |
1377 | goto_handler, Pmode); | |
1378 | } | |
1379 | ||
1380 | ||
e2500fed | 1381 | static struct machine_function * |
ffbc8796 | 1382 | xtensa_init_machine_status (void) |
03984308 | 1383 | { |
766090c2 | 1384 | return ggc_cleared_alloc<machine_function> (); |
03984308 BW |
1385 | } |
1386 | ||
1387 | ||
2a48b790 BW |
1388 | /* Shift VAL of mode MODE left by COUNT bits. */ |
1389 | ||
1390 | static inline rtx | |
ef4bddc2 | 1391 | xtensa_expand_mask_and_shift (rtx val, machine_mode mode, rtx count) |
2a48b790 BW |
1392 | { |
1393 | val = expand_simple_binop (SImode, AND, val, GEN_INT (GET_MODE_MASK (mode)), | |
1394 | NULL_RTX, 1, OPTAB_DIRECT); | |
1395 | return expand_simple_binop (SImode, ASHIFT, val, count, | |
1396 | NULL_RTX, 1, OPTAB_DIRECT); | |
1397 | } | |
1398 | ||
1399 | ||
1400 | /* Structure to hold the initial parameters for a compare_and_swap operation | |
1401 | in HImode and QImode. */ | |
1402 | ||
1403 | struct alignment_context | |
1404 | { | |
1405 | rtx memsi; /* SI aligned memory location. */ | |
1406 | rtx shift; /* Bit offset with regard to lsb. */ | |
1407 | rtx modemask; /* Mask of the HQImode shifted by SHIFT bits. */ | |
1408 | rtx modemaski; /* ~modemask */ | |
1409 | }; | |
1410 | ||
1411 | ||
1412 | /* Initialize structure AC for word access to HI and QI mode memory. */ | |
1413 | ||
1414 | static void | |
1415 | init_alignment_context (struct alignment_context *ac, rtx mem) | |
1416 | { | |
ef4bddc2 | 1417 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1418 | rtx byteoffset = NULL_RTX; |
1419 | bool aligned = (MEM_ALIGN (mem) >= GET_MODE_BITSIZE (SImode)); | |
1420 | ||
1421 | if (aligned) | |
1422 | ac->memsi = adjust_address (mem, SImode, 0); /* Memory is aligned. */ | |
1423 | else | |
1424 | { | |
1425 | /* Alignment is unknown. */ | |
1426 | rtx addr, align; | |
1427 | ||
1428 | /* Force the address into a register. */ | |
1429 | addr = force_reg (Pmode, XEXP (mem, 0)); | |
1430 | ||
1431 | /* Align it to SImode. */ | |
1432 | align = expand_simple_binop (Pmode, AND, addr, | |
1433 | GEN_INT (-GET_MODE_SIZE (SImode)), | |
1434 | NULL_RTX, 1, OPTAB_DIRECT); | |
1435 | /* Generate MEM. */ | |
1436 | ac->memsi = gen_rtx_MEM (SImode, align); | |
1437 | MEM_VOLATILE_P (ac->memsi) = MEM_VOLATILE_P (mem); | |
1438 | set_mem_alias_set (ac->memsi, ALIAS_SET_MEMORY_BARRIER); | |
1439 | set_mem_align (ac->memsi, GET_MODE_BITSIZE (SImode)); | |
1440 | ||
1441 | byteoffset = expand_simple_binop (Pmode, AND, addr, | |
1442 | GEN_INT (GET_MODE_SIZE (SImode) - 1), | |
1443 | NULL_RTX, 1, OPTAB_DIRECT); | |
1444 | } | |
1445 | ||
1446 | /* Calculate shiftcount. */ | |
1447 | if (TARGET_BIG_ENDIAN) | |
1448 | { | |
1449 | ac->shift = GEN_INT (GET_MODE_SIZE (SImode) - GET_MODE_SIZE (mode)); | |
1450 | if (!aligned) | |
1451 | ac->shift = expand_simple_binop (SImode, MINUS, ac->shift, byteoffset, | |
1452 | NULL_RTX, 1, OPTAB_DIRECT); | |
1453 | } | |
1454 | else | |
1455 | { | |
1456 | if (aligned) | |
1457 | ac->shift = NULL_RTX; | |
1458 | else | |
1459 | ac->shift = byteoffset; | |
1460 | } | |
1461 | ||
1462 | if (ac->shift != NULL_RTX) | |
1463 | { | |
1464 | /* Shift is the byte count, but we need the bitcount. */ | |
91767ed1 MF |
1465 | gcc_assert (exact_log2 (BITS_PER_UNIT) >= 0); |
1466 | ac->shift = expand_simple_binop (SImode, ASHIFT, ac->shift, | |
1467 | GEN_INT (exact_log2 (BITS_PER_UNIT)), | |
2a48b790 BW |
1468 | NULL_RTX, 1, OPTAB_DIRECT); |
1469 | ac->modemask = expand_simple_binop (SImode, ASHIFT, | |
1470 | GEN_INT (GET_MODE_MASK (mode)), | |
1471 | ac->shift, | |
1472 | NULL_RTX, 1, OPTAB_DIRECT); | |
1473 | } | |
1474 | else | |
1475 | ac->modemask = GEN_INT (GET_MODE_MASK (mode)); | |
1476 | ||
1477 | ac->modemaski = expand_simple_unop (SImode, NOT, ac->modemask, NULL_RTX, 1); | |
1478 | } | |
1479 | ||
1480 | ||
1481 | /* Expand an atomic compare and swap operation for HImode and QImode. | |
1482 | MEM is the memory location, CMP the old value to compare MEM with | |
0a2aaacc | 1483 | and NEW_RTX the value to set if CMP == MEM. */ |
2a48b790 BW |
1484 | |
1485 | void | |
0a2aaacc | 1486 | xtensa_expand_compare_and_swap (rtx target, rtx mem, rtx cmp, rtx new_rtx) |
2a48b790 | 1487 | { |
ef4bddc2 | 1488 | machine_mode mode = GET_MODE (mem); |
2a48b790 BW |
1489 | struct alignment_context ac; |
1490 | rtx tmp, cmpv, newv, val; | |
1491 | rtx oldval = gen_reg_rtx (SImode); | |
1492 | rtx res = gen_reg_rtx (SImode); | |
240a513f DM |
1493 | rtx_code_label *csloop = gen_label_rtx (); |
1494 | rtx_code_label *csend = gen_label_rtx (); | |
2a48b790 BW |
1495 | |
1496 | init_alignment_context (&ac, mem); | |
1497 | ||
1498 | if (ac.shift != NULL_RTX) | |
1499 | { | |
1500 | cmp = xtensa_expand_mask_and_shift (cmp, mode, ac.shift); | |
0a2aaacc | 1501 | new_rtx = xtensa_expand_mask_and_shift (new_rtx, mode, ac.shift); |
2a48b790 BW |
1502 | } |
1503 | ||
1504 | /* Load the surrounding word into VAL with the MEM value masked out. */ | |
1505 | val = force_reg (SImode, expand_simple_binop (SImode, AND, ac.memsi, | |
1506 | ac.modemaski, NULL_RTX, 1, | |
1507 | OPTAB_DIRECT)); | |
1508 | emit_label (csloop); | |
1509 | ||
0a2aaacc | 1510 | /* Patch CMP and NEW_RTX into VAL at correct position. */ |
2a48b790 BW |
1511 | cmpv = force_reg (SImode, expand_simple_binop (SImode, IOR, cmp, val, |
1512 | NULL_RTX, 1, OPTAB_DIRECT)); | |
0a2aaacc | 1513 | newv = force_reg (SImode, expand_simple_binop (SImode, IOR, new_rtx, val, |
2a48b790 BW |
1514 | NULL_RTX, 1, OPTAB_DIRECT)); |
1515 | ||
1516 | /* Jump to end if we're done. */ | |
1517 | emit_insn (gen_sync_compare_and_swapsi (res, ac.memsi, cmpv, newv)); | |
1518 | emit_cmp_and_jump_insns (res, cmpv, EQ, const0_rtx, SImode, true, csend); | |
1519 | ||
1520 | /* Check for changes outside mode. */ | |
1521 | emit_move_insn (oldval, val); | |
1522 | tmp = expand_simple_binop (SImode, AND, res, ac.modemaski, | |
1523 | val, 1, OPTAB_DIRECT); | |
1524 | if (tmp != val) | |
1525 | emit_move_insn (val, tmp); | |
1526 | ||
1527 | /* Loop internal if so. */ | |
1528 | emit_cmp_and_jump_insns (oldval, val, NE, const0_rtx, SImode, true, csloop); | |
1529 | ||
1530 | emit_label (csend); | |
1531 | ||
1532 | /* Return the correct part of the bitfield. */ | |
1533 | convert_move (target, | |
1534 | (ac.shift == NULL_RTX ? res | |
1535 | : expand_simple_binop (SImode, LSHIFTRT, res, ac.shift, | |
1536 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1537 | 1); | |
1538 | } | |
1539 | ||
1540 | ||
1541 | /* Expand an atomic operation CODE of mode MODE (either HImode or QImode -- | |
1542 | the default expansion works fine for SImode). MEM is the memory location | |
1543 | and VAL the value to play with. If AFTER is true then store the value | |
1544 | MEM holds after the operation, if AFTER is false then store the value MEM | |
1545 | holds before the operation. If TARGET is zero then discard that value, else | |
1546 | store it to TARGET. */ | |
1547 | ||
1548 | void | |
1549 | xtensa_expand_atomic (enum rtx_code code, rtx target, rtx mem, rtx val, | |
1550 | bool after) | |
1551 | { | |
ef4bddc2 | 1552 | machine_mode mode = GET_MODE (mem); |
2a48b790 | 1553 | struct alignment_context ac; |
240a513f | 1554 | rtx_code_label *csloop = gen_label_rtx (); |
2a48b790 BW |
1555 | rtx cmp, tmp; |
1556 | rtx old = gen_reg_rtx (SImode); | |
0a2aaacc | 1557 | rtx new_rtx = gen_reg_rtx (SImode); |
2a48b790 BW |
1558 | rtx orig = NULL_RTX; |
1559 | ||
1560 | init_alignment_context (&ac, mem); | |
1561 | ||
1562 | /* Prepare values before the compare-and-swap loop. */ | |
1563 | if (ac.shift != NULL_RTX) | |
1564 | val = xtensa_expand_mask_and_shift (val, mode, ac.shift); | |
1565 | switch (code) | |
1566 | { | |
1567 | case PLUS: | |
1568 | case MINUS: | |
1569 | orig = gen_reg_rtx (SImode); | |
1570 | convert_move (orig, val, 1); | |
1571 | break; | |
1572 | ||
1573 | case SET: | |
1574 | case IOR: | |
1575 | case XOR: | |
1576 | break; | |
1577 | ||
1578 | case MULT: /* NAND */ | |
1579 | case AND: | |
1580 | /* val = "11..1<val>11..1" */ | |
1581 | val = expand_simple_binop (SImode, XOR, val, ac.modemaski, | |
1582 | NULL_RTX, 1, OPTAB_DIRECT); | |
1583 | break; | |
1584 | ||
1585 | default: | |
1586 | gcc_unreachable (); | |
1587 | } | |
1588 | ||
1589 | /* Load full word. Subsequent loads are performed by S32C1I. */ | |
1590 | cmp = force_reg (SImode, ac.memsi); | |
1591 | ||
1592 | emit_label (csloop); | |
1593 | emit_move_insn (old, cmp); | |
1594 | ||
1595 | switch (code) | |
1596 | { | |
1597 | case PLUS: | |
1598 | case MINUS: | |
1599 | val = expand_simple_binop (SImode, code, old, orig, | |
1600 | NULL_RTX, 1, OPTAB_DIRECT); | |
1601 | val = expand_simple_binop (SImode, AND, val, ac.modemask, | |
1602 | NULL_RTX, 1, OPTAB_DIRECT); | |
1603 | /* FALLTHRU */ | |
1604 | case SET: | |
1605 | tmp = expand_simple_binop (SImode, AND, old, ac.modemaski, | |
1606 | NULL_RTX, 1, OPTAB_DIRECT); | |
1607 | tmp = expand_simple_binop (SImode, IOR, tmp, val, | |
0a2aaacc | 1608 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1609 | break; |
1610 | ||
1611 | case AND: | |
1612 | case IOR: | |
1613 | case XOR: | |
1614 | tmp = expand_simple_binop (SImode, code, old, val, | |
0a2aaacc | 1615 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1616 | break; |
1617 | ||
1618 | case MULT: /* NAND */ | |
2a17b239 | 1619 | tmp = expand_simple_binop (SImode, AND, old, val, |
2a48b790 | 1620 | NULL_RTX, 1, OPTAB_DIRECT); |
2a17b239 | 1621 | tmp = expand_simple_binop (SImode, XOR, tmp, ac.modemask, |
0a2aaacc | 1622 | new_rtx, 1, OPTAB_DIRECT); |
2a48b790 BW |
1623 | break; |
1624 | ||
1625 | default: | |
1626 | gcc_unreachable (); | |
1627 | } | |
1628 | ||
0a2aaacc KG |
1629 | if (tmp != new_rtx) |
1630 | emit_move_insn (new_rtx, tmp); | |
1631 | emit_insn (gen_sync_compare_and_swapsi (cmp, ac.memsi, old, new_rtx)); | |
2a48b790 BW |
1632 | emit_cmp_and_jump_insns (cmp, old, NE, const0_rtx, SImode, true, csloop); |
1633 | ||
1634 | if (target) | |
1635 | { | |
0a2aaacc | 1636 | tmp = (after ? new_rtx : cmp); |
2a48b790 BW |
1637 | convert_move (target, |
1638 | (ac.shift == NULL_RTX ? tmp | |
1639 | : expand_simple_binop (SImode, LSHIFTRT, tmp, ac.shift, | |
1640 | NULL_RTX, 1, OPTAB_DIRECT)), | |
1641 | 1); | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | ||
03984308 | 1646 | void |
ffbc8796 | 1647 | xtensa_setup_frame_addresses (void) |
03984308 | 1648 | { |
b52b1749 | 1649 | /* Set flag to cause TARGET_FRAME_POINTER_REQUIRED to return true. */ |
03984308 BW |
1650 | cfun->machine->accesses_prev_frame = 1; |
1651 | ||
590e2636 MF |
1652 | if (TARGET_WINDOWED_ABI) |
1653 | emit_library_call | |
1654 | (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_libgcc_window_spill"), | |
db69559b | 1655 | LCT_NORMAL, VOIDmode); |
03984308 BW |
1656 | } |
1657 | ||
1658 | ||
638db43e BW |
1659 | /* Emit the assembly for the end of a zero-cost loop. Normally we just emit |
1660 | a comment showing where the end of the loop is. However, if there is a | |
03984308 | 1661 | label or a branch at the end of the loop then we need to place a nop |
638db43e | 1662 | there. If the loop ends with a label we need the nop so that branches |
839a4992 KH |
1663 | targeting that label will target the nop (and thus remain in the loop), |
1664 | instead of targeting the instruction after the loop (and thus exiting | |
638db43e | 1665 | the loop). If the loop ends with a branch, we need the nop in case the |
839a4992 | 1666 | branch is targeting a location inside the loop. When the branch |
03984308 BW |
1667 | executes it will cause the loop count to be decremented even if it is |
1668 | taken (because it is the last instruction in the loop), so we need to | |
1669 | nop after the branch to prevent the loop count from being decremented | |
638db43e | 1670 | when the branch is taken. */ |
03984308 BW |
1671 | |
1672 | void | |
240a513f | 1673 | xtensa_emit_loop_end (rtx_insn *insn, rtx *operands) |
03984308 BW |
1674 | { |
1675 | char done = 0; | |
1676 | ||
1677 | for (insn = PREV_INSN (insn); insn && !done; insn = PREV_INSN (insn)) | |
1678 | { | |
1679 | switch (GET_CODE (insn)) | |
1680 | { | |
1681 | case NOTE: | |
1682 | case BARRIER: | |
1683 | break; | |
1684 | ||
1685 | case CODE_LABEL: | |
0bd0703d | 1686 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1687 | done = 1; |
1688 | break; | |
1689 | ||
1690 | default: | |
1691 | { | |
1692 | rtx body = PATTERN (insn); | |
1693 | ||
b64925dc | 1694 | if (JUMP_P (body)) |
03984308 | 1695 | { |
0bd0703d | 1696 | output_asm_insn (TARGET_DENSITY ? "nop.n" : "nop", operands); |
03984308 BW |
1697 | done = 1; |
1698 | } | |
1699 | else if ((GET_CODE (body) != USE) | |
1700 | && (GET_CODE (body) != CLOBBER)) | |
1701 | done = 1; | |
1702 | } | |
1703 | break; | |
1704 | } | |
1705 | } | |
1706 | ||
6383386a | 1707 | output_asm_insn ("%1_LEND:", operands); |
03984308 BW |
1708 | } |
1709 | ||
1710 | ||
036a2b7a BW |
1711 | char * |
1712 | xtensa_emit_branch (bool inverted, bool immed, rtx *operands) | |
1713 | { | |
1714 | static char result[64]; | |
1715 | enum rtx_code code; | |
1716 | const char *op; | |
1717 | ||
1718 | code = GET_CODE (operands[3]); | |
1719 | switch (code) | |
1720 | { | |
1721 | case EQ: op = inverted ? "ne" : "eq"; break; | |
1722 | case NE: op = inverted ? "eq" : "ne"; break; | |
1723 | case LT: op = inverted ? "ge" : "lt"; break; | |
1724 | case GE: op = inverted ? "lt" : "ge"; break; | |
1725 | case LTU: op = inverted ? "geu" : "ltu"; break; | |
1726 | case GEU: op = inverted ? "ltu" : "geu"; break; | |
1727 | default: gcc_unreachable (); | |
1728 | } | |
1729 | ||
1730 | if (immed) | |
1731 | { | |
1732 | if (INTVAL (operands[1]) == 0) | |
1733 | sprintf (result, "b%sz%s\t%%0, %%2", op, | |
1734 | (TARGET_DENSITY && (code == EQ || code == NE)) ? ".n" : ""); | |
1735 | else | |
1736 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1737 | } | |
1738 | else | |
1739 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1740 | ||
1741 | return result; | |
1742 | } | |
1743 | ||
1744 | ||
1745 | char * | |
1746 | xtensa_emit_bit_branch (bool inverted, bool immed, rtx *operands) | |
1747 | { | |
1748 | static char result[64]; | |
1749 | const char *op; | |
1750 | ||
1751 | switch (GET_CODE (operands[3])) | |
1752 | { | |
1753 | case EQ: op = inverted ? "bs" : "bc"; break; | |
1754 | case NE: op = inverted ? "bc" : "bs"; break; | |
1755 | default: gcc_unreachable (); | |
1756 | } | |
1757 | ||
1758 | if (immed) | |
1759 | { | |
1760 | unsigned bitnum = INTVAL (operands[1]) & 0x1f; | |
1761 | operands[1] = GEN_INT (bitnum); | |
1762 | sprintf (result, "b%si\t%%0, %%d1, %%2", op); | |
1763 | } | |
1764 | else | |
1765 | sprintf (result, "b%s\t%%0, %%1, %%2", op); | |
1766 | ||
1767 | return result; | |
1768 | } | |
1769 | ||
1770 | ||
1771 | char * | |
1772 | xtensa_emit_movcc (bool inverted, bool isfp, bool isbool, rtx *operands) | |
1773 | { | |
1774 | static char result[64]; | |
1775 | enum rtx_code code; | |
1776 | const char *op; | |
1777 | ||
1778 | code = GET_CODE (operands[4]); | |
1779 | if (isbool) | |
1780 | { | |
1781 | switch (code) | |
1782 | { | |
1783 | case EQ: op = inverted ? "t" : "f"; break; | |
1784 | case NE: op = inverted ? "f" : "t"; break; | |
1785 | default: gcc_unreachable (); | |
1786 | } | |
1787 | } | |
1788 | else | |
1789 | { | |
1790 | switch (code) | |
1791 | { | |
1792 | case EQ: op = inverted ? "nez" : "eqz"; break; | |
1793 | case NE: op = inverted ? "eqz" : "nez"; break; | |
1794 | case LT: op = inverted ? "gez" : "ltz"; break; | |
1795 | case GE: op = inverted ? "ltz" : "gez"; break; | |
1796 | default: gcc_unreachable (); | |
1797 | } | |
1798 | } | |
1799 | ||
1800 | sprintf (result, "mov%s%s\t%%0, %%%d, %%1", | |
1801 | op, isfp ? ".s" : "", inverted ? 3 : 2); | |
1802 | return result; | |
1803 | } | |
1804 | ||
1805 | ||
03984308 | 1806 | char * |
ffbc8796 | 1807 | xtensa_emit_call (int callop, rtx *operands) |
03984308 | 1808 | { |
b64a1b53 | 1809 | static char result[64]; |
03984308 BW |
1810 | rtx tgt = operands[callop]; |
1811 | ||
1812 | if (GET_CODE (tgt) == CONST_INT) | |
3904010d MF |
1813 | sprintf (result, "call%d\t" HOST_WIDE_INT_PRINT_HEX, |
1814 | WINDOW_SIZE, INTVAL (tgt)); | |
03984308 | 1815 | else if (register_operand (tgt, VOIDmode)) |
590e2636 | 1816 | sprintf (result, "callx%d\t%%%d", WINDOW_SIZE, callop); |
03984308 | 1817 | else |
590e2636 | 1818 | sprintf (result, "call%d\t%%%d", WINDOW_SIZE, callop); |
03984308 BW |
1819 | |
1820 | return result; | |
1821 | } | |
1822 | ||
1823 | ||
da1f39e4 | 1824 | bool |
ef4bddc2 | 1825 | xtensa_legitimate_address_p (machine_mode mode, rtx addr, bool strict) |
da1f39e4 BW |
1826 | { |
1827 | /* Allow constant pool addresses. */ | |
1828 | if (mode != BLKmode && GET_MODE_SIZE (mode) >= UNITS_PER_WORD | |
6a7a462c BW |
1829 | && ! TARGET_CONST16 && constantpool_address_p (addr) |
1830 | && ! xtensa_tls_referenced_p (addr)) | |
da1f39e4 BW |
1831 | return true; |
1832 | ||
1833 | while (GET_CODE (addr) == SUBREG) | |
1834 | addr = SUBREG_REG (addr); | |
1835 | ||
1836 | /* Allow base registers. */ | |
1837 | if (GET_CODE (addr) == REG && BASE_REG_P (addr, strict)) | |
1838 | return true; | |
1839 | ||
1840 | /* Check for "register + offset" addressing. */ | |
1841 | if (GET_CODE (addr) == PLUS) | |
1842 | { | |
1843 | rtx xplus0 = XEXP (addr, 0); | |
1844 | rtx xplus1 = XEXP (addr, 1); | |
1845 | enum rtx_code code0; | |
1846 | enum rtx_code code1; | |
1847 | ||
1848 | while (GET_CODE (xplus0) == SUBREG) | |
1849 | xplus0 = SUBREG_REG (xplus0); | |
1850 | code0 = GET_CODE (xplus0); | |
1851 | ||
1852 | while (GET_CODE (xplus1) == SUBREG) | |
1853 | xplus1 = SUBREG_REG (xplus1); | |
1854 | code1 = GET_CODE (xplus1); | |
1855 | ||
1856 | /* Swap operands if necessary so the register is first. */ | |
1857 | if (code0 != REG && code1 == REG) | |
1858 | { | |
1859 | xplus0 = XEXP (addr, 1); | |
1860 | xplus1 = XEXP (addr, 0); | |
1861 | code0 = GET_CODE (xplus0); | |
1862 | code1 = GET_CODE (xplus1); | |
1863 | } | |
1864 | ||
1865 | if (code0 == REG && BASE_REG_P (xplus0, strict) | |
1866 | && code1 == CONST_INT | |
1867 | && xtensa_mem_offset (INTVAL (xplus1), mode)) | |
1868 | return true; | |
1869 | } | |
1870 | ||
1871 | return false; | |
1872 | } | |
1873 | ||
1874 | ||
6a7a462c BW |
1875 | /* Construct the SYMBOL_REF for the _TLS_MODULE_BASE_ symbol. */ |
1876 | ||
1877 | static GTY(()) rtx xtensa_tls_module_base_symbol; | |
1878 | ||
1879 | static rtx | |
1880 | xtensa_tls_module_base (void) | |
1881 | { | |
1882 | if (! xtensa_tls_module_base_symbol) | |
1883 | { | |
1884 | xtensa_tls_module_base_symbol = | |
1885 | gen_rtx_SYMBOL_REF (Pmode, "_TLS_MODULE_BASE_"); | |
1886 | SYMBOL_REF_FLAGS (xtensa_tls_module_base_symbol) | |
1887 | |= TLS_MODEL_GLOBAL_DYNAMIC << SYMBOL_FLAG_TLS_SHIFT; | |
1888 | } | |
1889 | ||
1890 | return xtensa_tls_module_base_symbol; | |
1891 | } | |
1892 | ||
1893 | ||
240a513f | 1894 | static rtx_insn * |
6a7a462c BW |
1895 | xtensa_call_tls_desc (rtx sym, rtx *retp) |
1896 | { | |
e1b8828b | 1897 | rtx fn, arg, a_io; |
240a513f | 1898 | rtx_insn *call_insn, *insns; |
6a7a462c BW |
1899 | |
1900 | start_sequence (); | |
1901 | fn = gen_reg_rtx (Pmode); | |
1902 | arg = gen_reg_rtx (Pmode); | |
e1b8828b | 1903 | a_io = gen_rtx_REG (Pmode, WINDOW_SIZE + 2); |
6a7a462c BW |
1904 | |
1905 | emit_insn (gen_tls_func (fn, sym)); | |
1906 | emit_insn (gen_tls_arg (arg, sym)); | |
e1b8828b MF |
1907 | emit_move_insn (a_io, arg); |
1908 | call_insn = emit_call_insn (gen_tls_call (a_io, fn, sym, const1_rtx)); | |
1909 | use_reg (&CALL_INSN_FUNCTION_USAGE (call_insn), a_io); | |
6a7a462c BW |
1910 | insns = get_insns (); |
1911 | end_sequence (); | |
1912 | ||
e1b8828b | 1913 | *retp = a_io; |
6a7a462c BW |
1914 | return insns; |
1915 | } | |
1916 | ||
1917 | ||
1918 | static rtx | |
1919 | xtensa_legitimize_tls_address (rtx x) | |
1920 | { | |
1921 | unsigned int model = SYMBOL_REF_TLS_MODEL (x); | |
240a513f DM |
1922 | rtx dest, tp, ret, modbase, base, addend; |
1923 | rtx_insn *insns; | |
6a7a462c BW |
1924 | |
1925 | dest = gen_reg_rtx (Pmode); | |
1926 | switch (model) | |
1927 | { | |
1928 | case TLS_MODEL_GLOBAL_DYNAMIC: | |
1929 | insns = xtensa_call_tls_desc (x, &ret); | |
1930 | emit_libcall_block (insns, dest, ret, x); | |
1931 | break; | |
1932 | ||
1933 | case TLS_MODEL_LOCAL_DYNAMIC: | |
1934 | base = gen_reg_rtx (Pmode); | |
1935 | modbase = xtensa_tls_module_base (); | |
1936 | insns = xtensa_call_tls_desc (modbase, &ret); | |
1937 | emit_libcall_block (insns, base, ret, modbase); | |
1938 | addend = force_reg (SImode, gen_sym_DTPOFF (x)); | |
1939 | emit_insn (gen_addsi3 (dest, base, addend)); | |
1940 | break; | |
1941 | ||
1942 | case TLS_MODEL_INITIAL_EXEC: | |
1943 | case TLS_MODEL_LOCAL_EXEC: | |
1944 | tp = gen_reg_rtx (SImode); | |
f959607b | 1945 | emit_insn (gen_get_thread_pointersi (tp)); |
6a7a462c BW |
1946 | addend = force_reg (SImode, gen_sym_TPOFF (x)); |
1947 | emit_insn (gen_addsi3 (dest, tp, addend)); | |
1948 | break; | |
1949 | ||
1950 | default: | |
1951 | gcc_unreachable (); | |
1952 | } | |
1953 | ||
1954 | return dest; | |
1955 | } | |
1956 | ||
1957 | ||
da1f39e4 BW |
1958 | rtx |
1959 | xtensa_legitimize_address (rtx x, | |
1960 | rtx oldx ATTRIBUTE_UNUSED, | |
ef4bddc2 | 1961 | machine_mode mode) |
da1f39e4 | 1962 | { |
6a7a462c BW |
1963 | if (xtensa_tls_symbol_p (x)) |
1964 | return xtensa_legitimize_tls_address (x); | |
1965 | ||
da1f39e4 BW |
1966 | if (GET_CODE (x) == PLUS) |
1967 | { | |
1968 | rtx plus0 = XEXP (x, 0); | |
1969 | rtx plus1 = XEXP (x, 1); | |
1970 | ||
1971 | if (GET_CODE (plus0) != REG && GET_CODE (plus1) == REG) | |
1972 | { | |
1973 | plus0 = XEXP (x, 1); | |
1974 | plus1 = XEXP (x, 0); | |
1975 | } | |
1976 | ||
1977 | /* Try to split up the offset to use an ADDMI instruction. */ | |
1978 | if (GET_CODE (plus0) == REG | |
1979 | && GET_CODE (plus1) == CONST_INT | |
1980 | && !xtensa_mem_offset (INTVAL (plus1), mode) | |
1981 | && !xtensa_simm8 (INTVAL (plus1)) | |
1982 | && xtensa_mem_offset (INTVAL (plus1) & 0xff, mode) | |
1983 | && xtensa_simm8x256 (INTVAL (plus1) & ~0xff)) | |
1984 | { | |
1985 | rtx temp = gen_reg_rtx (Pmode); | |
1986 | rtx addmi_offset = GEN_INT (INTVAL (plus1) & ~0xff); | |
f7df4a84 RS |
1987 | emit_insn (gen_rtx_SET (temp, gen_rtx_PLUS (Pmode, plus0, |
1988 | addmi_offset))); | |
da1f39e4 BW |
1989 | return gen_rtx_PLUS (Pmode, temp, GEN_INT (INTVAL (plus1) & 0xff)); |
1990 | } | |
1991 | } | |
1992 | ||
506d7b68 | 1993 | return x; |
da1f39e4 BW |
1994 | } |
1995 | ||
a1a79768 AS |
1996 | /* Worker function for TARGET_MODE_DEPENDENT_ADDRESS_P. |
1997 | ||
1998 | Treat constant-pool references as "mode dependent" since they can | |
1999 | only be accessed with SImode loads. This works around a bug in the | |
2000 | combiner where a constant pool reference is temporarily converted | |
2001 | to an HImode load, which is then assumed to zero-extend based on | |
2002 | our definition of LOAD_EXTEND_OP. This is wrong because the high | |
2003 | bits of a 16-bit value in the constant pool are now sign-extended | |
2004 | by default. */ | |
2005 | ||
2006 | static bool | |
5bfed9a9 GJL |
2007 | xtensa_mode_dependent_address_p (const_rtx addr, |
2008 | addr_space_t as ATTRIBUTE_UNUSED) | |
a1a79768 AS |
2009 | { |
2010 | return constantpool_address_p (addr); | |
2011 | } | |
da1f39e4 | 2012 | |
6a7a462c BW |
2013 | /* Return TRUE if X contains any TLS symbol references. */ |
2014 | ||
2015 | bool | |
2016 | xtensa_tls_referenced_p (rtx x) | |
2017 | { | |
2018 | if (! TARGET_HAVE_TLS) | |
2019 | return false; | |
2020 | ||
2f36a994 RS |
2021 | subrtx_iterator::array_type array; |
2022 | FOR_EACH_SUBRTX (iter, array, x, ALL) | |
2023 | { | |
2024 | const_rtx x = *iter; | |
2025 | if (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0) | |
2026 | return true; | |
2027 | ||
2028 | /* Ignore TLS references that have already been legitimized. */ | |
2029 | if (GET_CODE (x) == UNSPEC) | |
2030 | switch (XINT (x, 1)) | |
2031 | { | |
2032 | case UNSPEC_TPOFF: | |
2033 | case UNSPEC_DTPOFF: | |
2034 | case UNSPEC_TLS_FUNC: | |
2035 | case UNSPEC_TLS_ARG: | |
2036 | case UNSPEC_TLS_CALL: | |
2037 | iter.skip_subrtxes (); | |
2038 | break; | |
2039 | default: | |
2040 | break; | |
2041 | } | |
2042 | } | |
2043 | return false; | |
6a7a462c BW |
2044 | } |
2045 | ||
2046 | ||
fbbf66e7 RS |
2047 | /* Implement TARGET_CANNOT_FORCE_CONST_MEM. */ |
2048 | ||
2049 | static bool | |
ef4bddc2 | 2050 | xtensa_cannot_force_const_mem (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
fbbf66e7 RS |
2051 | { |
2052 | return xtensa_tls_referenced_p (x); | |
2053 | } | |
2054 | ||
2055 | ||
b0c6e48f | 2056 | /* Return the debugger register number to use for 'regno'. */ |
03984308 BW |
2057 | |
2058 | int | |
ffbc8796 | 2059 | xtensa_dbx_register_number (int regno) |
03984308 BW |
2060 | { |
2061 | int first = -1; | |
633e4eb4 BW |
2062 | |
2063 | if (GP_REG_P (regno)) | |
2064 | { | |
2065 | regno -= GP_REG_FIRST; | |
2066 | first = 0; | |
2067 | } | |
2068 | else if (BR_REG_P (regno)) | |
2069 | { | |
2070 | regno -= BR_REG_FIRST; | |
2071 | first = 16; | |
2072 | } | |
2073 | else if (FP_REG_P (regno)) | |
2074 | { | |
2075 | regno -= FP_REG_FIRST; | |
b0c6e48f | 2076 | first = 48; |
633e4eb4 | 2077 | } |
03984308 BW |
2078 | else if (ACC_REG_P (regno)) |
2079 | { | |
b0c6e48f BW |
2080 | first = 0x200; /* Start of Xtensa special registers. */ |
2081 | regno = 16; /* ACCLO is special register 16. */ | |
03984308 BW |
2082 | } |
2083 | ||
2084 | /* When optimizing, we sometimes get asked about pseudo-registers | |
638db43e | 2085 | that don't represent hard registers. Return 0 for these. */ |
03984308 BW |
2086 | if (first == -1) |
2087 | return 0; | |
2088 | ||
2089 | return first + regno; | |
2090 | } | |
2091 | ||
2092 | ||
2093 | /* Argument support functions. */ | |
2094 | ||
2095 | /* Initialize CUMULATIVE_ARGS for a function. */ | |
2096 | ||
2097 | void | |
997b8b4d | 2098 | init_cumulative_args (CUMULATIVE_ARGS *cum, int incoming) |
03984308 BW |
2099 | { |
2100 | cum->arg_words = 0; | |
997b8b4d | 2101 | cum->incoming = incoming; |
03984308 BW |
2102 | } |
2103 | ||
ffbc8796 | 2104 | |
03984308 BW |
2105 | /* Advance the argument to the next argument position. */ |
2106 | ||
626a4b31 | 2107 | static void |
6930c98c RS |
2108 | xtensa_function_arg_advance (cumulative_args_t cum, |
2109 | const function_arg_info &arg) | |
03984308 BW |
2110 | { |
2111 | int words, max; | |
2112 | int *arg_words; | |
2113 | ||
d5cc9181 | 2114 | arg_words = &get_cumulative_args (cum)->arg_words; |
03984308 BW |
2115 | max = MAX_ARGS_IN_REGISTERS; |
2116 | ||
6930c98c RS |
2117 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2118 | / UNITS_PER_WORD); | |
03984308 | 2119 | |
85d91d5b | 2120 | if (*arg_words < max |
0ffef200 | 2121 | && (targetm.calls.must_pass_in_stack (arg) |
85d91d5b | 2122 | || *arg_words + words > max)) |
03984308 BW |
2123 | *arg_words = max; |
2124 | ||
2125 | *arg_words += words; | |
2126 | } | |
2127 | ||
2128 | ||
6783fdb7 | 2129 | /* Return an RTL expression containing the register for the given argument, |
368ebcd6 | 2130 | or 0 if the argument is to be passed on the stack. INCOMING_P is nonzero |
ffbc8796 | 2131 | if this is an incoming argument to the current function. */ |
03984308 | 2132 | |
626a4b31 | 2133 | static rtx |
6783fdb7 RS |
2134 | xtensa_function_arg_1 (cumulative_args_t cum_v, const function_arg_info &arg, |
2135 | bool incoming_p) | |
03984308 | 2136 | { |
d5cc9181 | 2137 | CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v); |
03984308 BW |
2138 | int regbase, words, max; |
2139 | int *arg_words; | |
2140 | int regno; | |
03984308 BW |
2141 | |
2142 | arg_words = &cum->arg_words; | |
2143 | regbase = (incoming_p ? GP_ARG_FIRST : GP_OUTGOING_ARG_FIRST); | |
2144 | max = MAX_ARGS_IN_REGISTERS; | |
2145 | ||
6783fdb7 RS |
2146 | words = ((arg.promoted_size_in_bytes () + UNITS_PER_WORD - 1) |
2147 | / UNITS_PER_WORD); | |
03984308 | 2148 | |
6783fdb7 | 2149 | if (arg.type && (TYPE_ALIGN (arg.type) > BITS_PER_WORD)) |
822e895c | 2150 | { |
6783fdb7 | 2151 | int align = MIN (TYPE_ALIGN (arg.type), STACK_BOUNDARY) / BITS_PER_WORD; |
822e895c BW |
2152 | *arg_words = (*arg_words + align - 1) & -align; |
2153 | } | |
03984308 BW |
2154 | |
2155 | if (*arg_words + words > max) | |
2156 | return (rtx)0; | |
2157 | ||
2158 | regno = regbase + *arg_words; | |
03984308 | 2159 | |
997b8b4d | 2160 | if (cum->incoming && regno <= A7_REG && regno + words > A7_REG) |
590e2636 | 2161 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
03984308 | 2162 | |
6783fdb7 | 2163 | return gen_rtx_REG (arg.mode, regno); |
03984308 BW |
2164 | } |
2165 | ||
626a4b31 NF |
2166 | /* Implement TARGET_FUNCTION_ARG. */ |
2167 | ||
2168 | static rtx | |
6783fdb7 | 2169 | xtensa_function_arg (cumulative_args_t cum, const function_arg_info &arg) |
626a4b31 | 2170 | { |
6783fdb7 | 2171 | return xtensa_function_arg_1 (cum, arg, false); |
626a4b31 NF |
2172 | } |
2173 | ||
2174 | /* Implement TARGET_FUNCTION_INCOMING_ARG. */ | |
2175 | ||
2176 | static rtx | |
6783fdb7 RS |
2177 | xtensa_function_incoming_arg (cumulative_args_t cum, |
2178 | const function_arg_info &arg) | |
626a4b31 | 2179 | { |
6783fdb7 | 2180 | return xtensa_function_arg_1 (cum, arg, true); |
626a4b31 | 2181 | } |
03984308 | 2182 | |
c2ed6cf8 | 2183 | static unsigned int |
ef4bddc2 | 2184 | xtensa_function_arg_boundary (machine_mode mode, const_tree type) |
d2348985 BW |
2185 | { |
2186 | unsigned int alignment; | |
2187 | ||
2188 | alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode); | |
2189 | if (alignment < PARM_BOUNDARY) | |
2190 | alignment = PARM_BOUNDARY; | |
2191 | if (alignment > STACK_BOUNDARY) | |
2192 | alignment = STACK_BOUNDARY; | |
2193 | return alignment; | |
2194 | } | |
2195 | ||
2196 | ||
6e5ff6e7 | 2197 | static bool |
586de218 | 2198 | xtensa_return_in_msb (const_tree valtype) |
6e5ff6e7 BW |
2199 | { |
2200 | return (TARGET_BIG_ENDIAN | |
2201 | && AGGREGATE_TYPE_P (valtype) | |
2202 | && int_size_in_bytes (valtype) >= UNITS_PER_WORD); | |
2203 | } | |
2204 | ||
2205 | ||
c5387660 JM |
2206 | static void |
2207 | xtensa_option_override (void) | |
03984308 BW |
2208 | { |
2209 | int regno; | |
ef4bddc2 | 2210 | machine_mode mode; |
03984308 | 2211 | |
1a711a0b MF |
2212 | /* Use CONST16 in the absence of L32R. |
2213 | Set it in the TARGET_OPTION_OVERRIDE to avoid dependency on xtensa | |
2214 | configuration in the xtensa-common.c */ | |
2215 | ||
2216 | if (!TARGET_L32R) | |
2217 | target_flags |= MASK_CONST16; | |
2218 | ||
03984308 BW |
2219 | if (!TARGET_BOOLEANS && TARGET_HARD_FLOAT) |
2220 | error ("boolean registers required for the floating-point option"); | |
2221 | ||
638db43e | 2222 | /* Set up array giving whether a given register can hold a given mode. */ |
03984308 BW |
2223 | for (mode = VOIDmode; |
2224 | mode != MAX_MACHINE_MODE; | |
ef4bddc2 | 2225 | mode = (machine_mode) ((int) mode + 1)) |
03984308 BW |
2226 | { |
2227 | int size = GET_MODE_SIZE (mode); | |
0a2aaacc | 2228 | enum mode_class mclass = GET_MODE_CLASS (mode); |
03984308 BW |
2229 | |
2230 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++) | |
2231 | { | |
2232 | int temp; | |
2233 | ||
2234 | if (ACC_REG_P (regno)) | |
f42f5a1b | 2235 | temp = (TARGET_MAC16 |
0a2aaacc | 2236 | && (mclass == MODE_INT) && (size <= UNITS_PER_WORD)); |
03984308 BW |
2237 | else if (GP_REG_P (regno)) |
2238 | temp = ((regno & 1) == 0 || (size <= UNITS_PER_WORD)); | |
2239 | else if (FP_REG_P (regno)) | |
2240 | temp = (TARGET_HARD_FLOAT && (mode == SFmode)); | |
2241 | else if (BR_REG_P (regno)) | |
2242 | temp = (TARGET_BOOLEANS && (mode == CCmode)); | |
2243 | else | |
2244 | temp = FALSE; | |
2245 | ||
f939c3e6 | 2246 | xtensa_hard_regno_mode_ok_p[(int) mode][regno] = temp; |
03984308 BW |
2247 | } |
2248 | } | |
2249 | ||
2250 | init_machine_status = xtensa_init_machine_status; | |
03984308 | 2251 | |
f42f5a1b BW |
2252 | /* Check PIC settings. PIC is only supported when using L32R |
2253 | instructions, and some targets need to always use PIC. */ | |
2254 | if (flag_pic && TARGET_CONST16) | |
a3f9f006 | 2255 | error ("%<-f%s%> is not supported with CONST16 instructions", |
f42f5a1b | 2256 | (flag_pic > 1 ? "PIC" : "pic")); |
1b408ba1 SA |
2257 | else if (TARGET_FORCE_NO_PIC) |
2258 | flag_pic = 0; | |
f42f5a1b BW |
2259 | else if (XTENSA_ALWAYS_PIC) |
2260 | { | |
2261 | if (TARGET_CONST16) | |
2262 | error ("PIC is required but not supported with CONST16 instructions"); | |
2263 | flag_pic = 1; | |
2264 | } | |
2265 | /* There's no need for -fPIC (as opposed to -fpic) on Xtensa. */ | |
2266 | if (flag_pic > 1) | |
03984308 | 2267 | flag_pic = 1; |
166b25dc BW |
2268 | if (flag_pic && !flag_pie) |
2269 | flag_shlib = 1; | |
87c8b4be CT |
2270 | |
2271 | /* Hot/cold partitioning does not work on this architecture, because of | |
2272 | constant pools (the load instruction cannot necessarily reach that far). | |
2273 | Therefore disable it on this architecture. */ | |
2274 | if (flag_reorder_blocks_and_partition) | |
2275 | { | |
2276 | flag_reorder_blocks_and_partition = 0; | |
2277 | flag_reorder_blocks = 1; | |
2278 | } | |
03984308 BW |
2279 | } |
2280 | ||
c43f4279 RS |
2281 | /* Implement TARGET_HARD_REGNO_NREGS. */ |
2282 | ||
2283 | static unsigned int | |
2284 | xtensa_hard_regno_nregs (unsigned int regno, machine_mode mode) | |
2285 | { | |
2286 | if (FP_REG_P (regno)) | |
2287 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_FPREG); | |
2288 | return CEIL (GET_MODE_SIZE (mode), UNITS_PER_WORD); | |
2289 | } | |
2290 | ||
f939c3e6 RS |
2291 | /* Implement TARGET_HARD_REGNO_MODE_OK. */ |
2292 | ||
2293 | static bool | |
2294 | xtensa_hard_regno_mode_ok (unsigned int regno, machine_mode mode) | |
2295 | { | |
2296 | return xtensa_hard_regno_mode_ok_p[mode][regno]; | |
2297 | } | |
2298 | ||
99e1629f RS |
2299 | /* Implement TARGET_MODES_TIEABLE_P. */ |
2300 | ||
2301 | static bool | |
2302 | xtensa_modes_tieable_p (machine_mode mode1, machine_mode mode2) | |
2303 | { | |
2304 | return ((GET_MODE_CLASS (mode1) == MODE_FLOAT | |
2305 | || GET_MODE_CLASS (mode1) == MODE_COMPLEX_FLOAT) | |
2306 | == (GET_MODE_CLASS (mode2) == MODE_FLOAT | |
2307 | || GET_MODE_CLASS (mode2) == MODE_COMPLEX_FLOAT)); | |
2308 | } | |
2309 | ||
03984308 BW |
2310 | /* A C compound statement to output to stdio stream STREAM the |
2311 | assembler syntax for an instruction operand X. X is an RTL | |
2312 | expression. | |
2313 | ||
2314 | CODE is a value that can be used to specify one of several ways | |
2315 | of printing the operand. It is used when identical operands | |
2316 | must be printed differently depending on the context. CODE | |
2317 | comes from the '%' specification that was used to request | |
2318 | printing of the operand. If the specification was just '%DIGIT' | |
2319 | then CODE is 0; if the specification was '%LTR DIGIT' then CODE | |
2320 | is the ASCII code for LTR. | |
2321 | ||
2322 | If X is a register, this macro should print the register's name. | |
2323 | The names can be found in an array 'reg_names' whose type is | |
2324 | 'char *[]'. 'reg_names' is initialized from 'REGISTER_NAMES'. | |
2325 | ||
2326 | When the machine description has a specification '%PUNCT' (a '%' | |
2327 | followed by a punctuation character), this macro is called with | |
2328 | a null pointer for X and the punctuation character for CODE. | |
2329 | ||
2330 | 'a', 'c', 'l', and 'n' are reserved. | |
633e4eb4 | 2331 | |
03984308 BW |
2332 | The Xtensa specific codes are: |
2333 | ||
2334 | 'd' CONST_INT, print as signed decimal | |
2335 | 'x' CONST_INT, print as signed hexadecimal | |
2336 | 'K' CONST_INT, print number of bits in mask for EXTUI | |
2337 | 'R' CONST_INT, print (X & 0x1f) | |
2338 | 'L' CONST_INT, print ((32 - X) & 0x1f) | |
2339 | 'D' REG, print second register of double-word register operand | |
2340 | 'N' MEM, print address of next word following a memory operand | |
2341 | 'v' MEM, if memory reference is volatile, output a MEMW before it | |
f42f5a1b BW |
2342 | 't' any constant, add "@h" suffix for top 16 bits |
2343 | 'b' any constant, add "@l" suffix for bottom 16 bits | |
03984308 BW |
2344 | */ |
2345 | ||
2346 | static void | |
ffbc8796 | 2347 | printx (FILE *file, signed int val) |
03984308 | 2348 | { |
ffbc8796 | 2349 | /* Print a hexadecimal value in a nice way. */ |
03984308 BW |
2350 | if ((val > -0xa) && (val < 0xa)) |
2351 | fprintf (file, "%d", val); | |
2352 | else if (val < 0) | |
2353 | fprintf (file, "-0x%x", -val); | |
2354 | else | |
2355 | fprintf (file, "0x%x", val); | |
2356 | } | |
2357 | ||
2358 | ||
2359 | void | |
ffbc8796 | 2360 | print_operand (FILE *file, rtx x, int letter) |
03984308 | 2361 | { |
f42f5a1b | 2362 | if (!x) |
03984308 BW |
2363 | error ("PRINT_OPERAND null pointer"); |
2364 | ||
f42f5a1b | 2365 | switch (letter) |
03984308 | 2366 | { |
f42f5a1b BW |
2367 | case 'D': |
2368 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) | |
2369 | fprintf (file, "%s", reg_names[xt_true_regnum (x) + 1]); | |
2370 | else | |
2371 | output_operand_lossage ("invalid %%D value"); | |
2372 | break; | |
03984308 | 2373 | |
f42f5a1b BW |
2374 | case 'v': |
2375 | if (GET_CODE (x) == MEM) | |
2376 | { | |
2377 | /* For a volatile memory reference, emit a MEMW before the | |
2378 | load or store. */ | |
66e58b33 | 2379 | if (MEM_VOLATILE_P (x) && TARGET_SERIALIZE_VOLATILE) |
f42f5a1b BW |
2380 | fprintf (file, "memw\n\t"); |
2381 | } | |
2382 | else | |
2383 | output_operand_lossage ("invalid %%v value"); | |
2384 | break; | |
03984308 | 2385 | |
f42f5a1b BW |
2386 | case 'N': |
2387 | if (GET_CODE (x) == MEM | |
2388 | && (GET_MODE (x) == DFmode || GET_MODE (x) == DImode)) | |
2389 | { | |
0d4a1197 RS |
2390 | x = adjust_address (x, GET_MODE (x) == DFmode ? E_SFmode : E_SImode, |
2391 | 4); | |
cc8ca59e | 2392 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b BW |
2393 | } |
2394 | else | |
2395 | output_operand_lossage ("invalid %%N value"); | |
2396 | break; | |
03984308 | 2397 | |
f42f5a1b BW |
2398 | case 'K': |
2399 | if (GET_CODE (x) == CONST_INT) | |
03984308 | 2400 | { |
f42f5a1b BW |
2401 | int num_bits = 0; |
2402 | unsigned val = INTVAL (x); | |
2403 | while (val & 1) | |
2404 | { | |
2405 | num_bits += 1; | |
2406 | val = val >> 1; | |
2407 | } | |
2408 | if ((val != 0) || (num_bits == 0) || (num_bits > 16)) | |
2409 | fatal_insn ("invalid mask", x); | |
03984308 | 2410 | |
f42f5a1b BW |
2411 | fprintf (file, "%d", num_bits); |
2412 | } | |
2413 | else | |
2414 | output_operand_lossage ("invalid %%K value"); | |
2415 | break; | |
03984308 | 2416 | |
f42f5a1b BW |
2417 | case 'L': |
2418 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2419 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, (32 - INTVAL (x)) & 0x1f); |
f42f5a1b BW |
2420 | else |
2421 | output_operand_lossage ("invalid %%L value"); | |
2422 | break; | |
03984308 | 2423 | |
f42f5a1b BW |
2424 | case 'R': |
2425 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2426 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x) & 0x1f); |
f42f5a1b BW |
2427 | else |
2428 | output_operand_lossage ("invalid %%R value"); | |
2429 | break; | |
03984308 | 2430 | |
f42f5a1b BW |
2431 | case 'x': |
2432 | if (GET_CODE (x) == CONST_INT) | |
2433 | printx (file, INTVAL (x)); | |
2434 | else | |
2435 | output_operand_lossage ("invalid %%x value"); | |
2436 | break; | |
03984308 | 2437 | |
f42f5a1b BW |
2438 | case 'd': |
2439 | if (GET_CODE (x) == CONST_INT) | |
3904010d | 2440 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2441 | else |
2442 | output_operand_lossage ("invalid %%d value"); | |
2443 | break; | |
03984308 | 2444 | |
f42f5a1b BW |
2445 | case 't': |
2446 | case 'b': | |
2447 | if (GET_CODE (x) == CONST_INT) | |
2448 | { | |
2449 | printx (file, INTVAL (x)); | |
2450 | fputs (letter == 't' ? "@h" : "@l", file); | |
2451 | } | |
2452 | else if (GET_CODE (x) == CONST_DOUBLE) | |
2453 | { | |
f42f5a1b BW |
2454 | if (GET_MODE (x) == SFmode) |
2455 | { | |
2456 | long l; | |
34a72c33 | 2457 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
f42f5a1b BW |
2458 | fprintf (file, "0x%08lx@%c", l, letter == 't' ? 'h' : 'l'); |
2459 | } | |
2460 | else | |
2461 | output_operand_lossage ("invalid %%t/%%b value"); | |
2462 | } | |
2463 | else if (GET_CODE (x) == CONST) | |
2464 | { | |
2465 | /* X must be a symbolic constant on ELF. Write an expression | |
2466 | suitable for 'const16' that sets the high or low 16 bits. */ | |
2467 | if (GET_CODE (XEXP (x, 0)) != PLUS | |
2468 | || (GET_CODE (XEXP (XEXP (x, 0), 0)) != SYMBOL_REF | |
2469 | && GET_CODE (XEXP (XEXP (x, 0), 0)) != LABEL_REF) | |
2470 | || GET_CODE (XEXP (XEXP (x, 0), 1)) != CONST_INT) | |
2471 | output_operand_lossage ("invalid %%t/%%b value"); | |
2472 | print_operand (file, XEXP (XEXP (x, 0), 0), 0); | |
2473 | fputs (letter == 't' ? "@h" : "@l", file); | |
2474 | /* There must be a non-alphanumeric character between 'h' or 'l' | |
2475 | and the number. The '-' is added by print_operand() already. */ | |
2476 | if (INTVAL (XEXP (XEXP (x, 0), 1)) >= 0) | |
2477 | fputs ("+", file); | |
2478 | print_operand (file, XEXP (XEXP (x, 0), 1), 0); | |
2479 | } | |
2480 | else | |
633e4eb4 | 2481 | { |
f42f5a1b BW |
2482 | output_addr_const (file, x); |
2483 | fputs (letter == 't' ? "@h" : "@l", file); | |
03984308 BW |
2484 | } |
2485 | break; | |
2486 | ||
a024f514 MF |
2487 | case 'y': |
2488 | if (GET_CODE (x) == CONST_DOUBLE && | |
2489 | GET_MODE (x) == SFmode) | |
2490 | { | |
a024f514 | 2491 | long l; |
34a72c33 | 2492 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), l); |
a024f514 MF |
2493 | fprintf (file, "0x%08lx", l); |
2494 | break; | |
2495 | } | |
2496 | ||
2497 | /* fall through */ | |
2498 | ||
03984308 | 2499 | default: |
f42f5a1b BW |
2500 | if (GET_CODE (x) == REG || GET_CODE (x) == SUBREG) |
2501 | fprintf (file, "%s", reg_names[xt_true_regnum (x)]); | |
2502 | else if (GET_CODE (x) == MEM) | |
cc8ca59e | 2503 | output_address (GET_MODE (x), XEXP (x, 0)); |
f42f5a1b | 2504 | else if (GET_CODE (x) == CONST_INT) |
3904010d | 2505 | fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); |
f42f5a1b BW |
2506 | else |
2507 | output_addr_const (file, x); | |
03984308 BW |
2508 | } |
2509 | } | |
2510 | ||
2511 | ||
2512 | /* A C compound statement to output to stdio stream STREAM the | |
2513 | assembler syntax for an instruction operand that is a memory | |
fb49053f | 2514 | reference whose address is ADDR. ADDR is an RTL expression. */ |
03984308 BW |
2515 | |
2516 | void | |
ffbc8796 | 2517 | print_operand_address (FILE *file, rtx addr) |
03984308 BW |
2518 | { |
2519 | if (!addr) | |
2520 | error ("PRINT_OPERAND_ADDRESS, null pointer"); | |
2521 | ||
2522 | switch (GET_CODE (addr)) | |
2523 | { | |
2524 | default: | |
2525 | fatal_insn ("invalid address", addr); | |
2526 | break; | |
2527 | ||
2528 | case REG: | |
2529 | fprintf (file, "%s, 0", reg_names [REGNO (addr)]); | |
2530 | break; | |
2531 | ||
2532 | case PLUS: | |
2533 | { | |
2534 | rtx reg = (rtx)0; | |
2535 | rtx offset = (rtx)0; | |
2536 | rtx arg0 = XEXP (addr, 0); | |
2537 | rtx arg1 = XEXP (addr, 1); | |
2538 | ||
2539 | if (GET_CODE (arg0) == REG) | |
2540 | { | |
2541 | reg = arg0; | |
2542 | offset = arg1; | |
2543 | } | |
2544 | else if (GET_CODE (arg1) == REG) | |
2545 | { | |
2546 | reg = arg1; | |
2547 | offset = arg0; | |
2548 | } | |
2549 | else | |
2550 | fatal_insn ("no register in address", addr); | |
2551 | ||
2552 | if (CONSTANT_P (offset)) | |
2553 | { | |
2554 | fprintf (file, "%s, ", reg_names [REGNO (reg)]); | |
2555 | output_addr_const (file, offset); | |
2556 | } | |
2557 | else | |
2558 | fatal_insn ("address offset not a constant", addr); | |
2559 | } | |
2560 | break; | |
2561 | ||
2562 | case LABEL_REF: | |
2563 | case SYMBOL_REF: | |
2564 | case CONST_INT: | |
2565 | case CONST: | |
2566 | output_addr_const (file, addr); | |
2567 | break; | |
2568 | } | |
2569 | } | |
2570 | ||
2ac6bb04 | 2571 | /* Implement TARGET_ASM_OUTPUT_ADDR_CONST_EXTRA. */ |
03984308 | 2572 | |
2ac6bb04 | 2573 | static bool |
da1f39e4 BW |
2574 | xtensa_output_addr_const_extra (FILE *fp, rtx x) |
2575 | { | |
2576 | if (GET_CODE (x) == UNSPEC && XVECLEN (x, 0) == 1) | |
2577 | { | |
2578 | switch (XINT (x, 1)) | |
2579 | { | |
6a7a462c BW |
2580 | case UNSPEC_TPOFF: |
2581 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2582 | fputs ("@TPOFF", fp); | |
2583 | return true; | |
2584 | case UNSPEC_DTPOFF: | |
2585 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2586 | fputs ("@DTPOFF", fp); | |
2587 | return true; | |
da1f39e4 BW |
2588 | case UNSPEC_PLT: |
2589 | if (flag_pic) | |
2590 | { | |
2591 | output_addr_const (fp, XVECEXP (x, 0, 0)); | |
2592 | fputs ("@PLT", fp); | |
2593 | return true; | |
2594 | } | |
2595 | break; | |
2596 | default: | |
2597 | break; | |
2598 | } | |
2599 | } | |
2600 | return false; | |
2601 | } | |
2602 | ||
9ae4ef4c MF |
2603 | static void |
2604 | xtensa_output_integer_literal_parts (FILE *file, rtx x, int size) | |
2605 | { | |
2606 | if (size > 4 && !(size & (size - 1))) | |
2607 | { | |
2608 | rtx first, second; | |
2609 | ||
2610 | split_double (x, &first, &second); | |
2611 | xtensa_output_integer_literal_parts (file, first, size / 2); | |
2612 | fputs (", ", file); | |
2613 | xtensa_output_integer_literal_parts (file, second, size / 2); | |
2614 | } | |
2615 | else if (size == 4) | |
2616 | { | |
2617 | output_addr_const (file, x); | |
2618 | } | |
2619 | else | |
2620 | { | |
2621 | gcc_unreachable(); | |
2622 | } | |
2623 | } | |
da1f39e4 | 2624 | |
03984308 | 2625 | void |
ef4bddc2 | 2626 | xtensa_output_literal (FILE *file, rtx x, machine_mode mode, int labelno) |
03984308 BW |
2627 | { |
2628 | long value_long[2]; | |
03984308 BW |
2629 | |
2630 | fprintf (file, "\t.literal .LC%u, ", (unsigned) labelno); | |
2631 | ||
2632 | switch (GET_MODE_CLASS (mode)) | |
2633 | { | |
2634 | case MODE_FLOAT: | |
177b6be0 | 2635 | gcc_assert (GET_CODE (x) == CONST_DOUBLE); |
03984308 | 2636 | |
03984308 BW |
2637 | switch (mode) |
2638 | { | |
4e10a5a7 | 2639 | case E_SFmode: |
34a72c33 RS |
2640 | REAL_VALUE_TO_TARGET_SINGLE (*CONST_DOUBLE_REAL_VALUE (x), |
2641 | value_long[0]); | |
4575a800 BW |
2642 | if (HOST_BITS_PER_LONG > 32) |
2643 | value_long[0] &= 0xffffffff; | |
b216cd4a | 2644 | fprintf (file, "0x%08lx\n", value_long[0]); |
03984308 BW |
2645 | break; |
2646 | ||
4e10a5a7 | 2647 | case E_DFmode: |
34a72c33 RS |
2648 | REAL_VALUE_TO_TARGET_DOUBLE (*CONST_DOUBLE_REAL_VALUE (x), |
2649 | value_long); | |
4575a800 BW |
2650 | if (HOST_BITS_PER_LONG > 32) |
2651 | { | |
2652 | value_long[0] &= 0xffffffff; | |
2653 | value_long[1] &= 0xffffffff; | |
2654 | } | |
b216cd4a ZW |
2655 | fprintf (file, "0x%08lx, 0x%08lx\n", |
2656 | value_long[0], value_long[1]); | |
03984308 BW |
2657 | break; |
2658 | ||
2659 | default: | |
177b6be0 | 2660 | gcc_unreachable (); |
03984308 BW |
2661 | } |
2662 | ||
2663 | break; | |
2664 | ||
2665 | case MODE_INT: | |
2666 | case MODE_PARTIAL_INT: | |
9ae4ef4c MF |
2667 | xtensa_output_integer_literal_parts (file, x, GET_MODE_SIZE (mode)); |
2668 | fputs ("\n", file); | |
03984308 BW |
2669 | break; |
2670 | ||
2671 | default: | |
177b6be0 | 2672 | gcc_unreachable (); |
03984308 BW |
2673 | } |
2674 | } | |
2675 | ||
590e2636 MF |
2676 | static bool |
2677 | xtensa_call_save_reg(int regno) | |
2678 | { | |
2679 | if (TARGET_WINDOWED_ABI) | |
2680 | return false; | |
2681 | ||
2682 | if (regno == A0_REG) | |
2683 | return crtl->profile || !crtl->is_leaf || crtl->calls_eh_return || | |
2684 | df_regs_ever_live_p (regno); | |
2685 | ||
2686 | if (crtl->calls_eh_return && regno >= 2 && regno < 4) | |
2687 | return true; | |
2688 | ||
2e3d041b | 2689 | return !call_used_or_fixed_reg_p (regno) && df_regs_ever_live_p (regno); |
590e2636 | 2690 | } |
03984308 BW |
2691 | |
2692 | /* Return the bytes needed to compute the frame pointer from the current | |
638db43e | 2693 | stack pointer. */ |
03984308 BW |
2694 | |
2695 | #define STACK_BYTES (STACK_BOUNDARY / BITS_PER_UNIT) | |
2696 | #define XTENSA_STACK_ALIGN(LOC) (((LOC) + STACK_BYTES-1) & ~(STACK_BYTES-1)) | |
2697 | ||
2698 | long | |
f075bd95 | 2699 | compute_frame_size (poly_int64 size) |
03984308 | 2700 | { |
590e2636 MF |
2701 | int regno; |
2702 | ||
ad89d820 MF |
2703 | if (reload_completed && cfun->machine->frame_laid_out) |
2704 | return cfun->machine->current_frame_size; | |
2705 | ||
ffbc8796 | 2706 | /* Add space for the incoming static chain value. */ |
6de9cd9a | 2707 | if (cfun->static_chain_decl != NULL) |
03984308 BW |
2708 | size += (1 * UNITS_PER_WORD); |
2709 | ||
ad89d820 | 2710 | cfun->machine->callee_save_size = 0; |
590e2636 MF |
2711 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) |
2712 | { | |
2713 | if (xtensa_call_save_reg(regno)) | |
ad89d820 | 2714 | cfun->machine->callee_save_size += UNITS_PER_WORD; |
590e2636 MF |
2715 | } |
2716 | ||
ad89d820 | 2717 | cfun->machine->current_frame_size = |
03984308 | 2718 | XTENSA_STACK_ALIGN (size |
ad89d820 | 2719 | + cfun->machine->callee_save_size |
38173d38 | 2720 | + crtl->outgoing_args_size |
03984308 | 2721 | + (WINDOW_SIZE * UNITS_PER_WORD)); |
ad89d820 MF |
2722 | cfun->machine->callee_save_size = |
2723 | XTENSA_STACK_ALIGN (cfun->machine->callee_save_size); | |
2724 | cfun->machine->frame_laid_out = true; | |
2725 | return cfun->machine->current_frame_size; | |
03984308 BW |
2726 | } |
2727 | ||
2728 | ||
b52b1749 | 2729 | bool |
ffbc8796 | 2730 | xtensa_frame_pointer_required (void) |
03984308 BW |
2731 | { |
2732 | /* The code to expand builtin_frame_addr and builtin_return_addr | |
2733 | currently uses the hard_frame_pointer instead of frame_pointer. | |
2734 | This seems wrong but maybe it's necessary for other architectures. | |
638db43e | 2735 | This function is derived from the i386 code. */ |
03984308 | 2736 | |
25403c41 | 2737 | if (cfun->machine->accesses_prev_frame || cfun->has_nonlocal_label) |
b52b1749 | 2738 | return true; |
03984308 | 2739 | |
b52b1749 | 2740 | return false; |
03984308 BW |
2741 | } |
2742 | ||
5057f9e0 | 2743 | HOST_WIDE_INT |
eced9b48 | 2744 | xtensa_initial_elimination_offset (int from, int to ATTRIBUTE_UNUSED) |
5057f9e0 MF |
2745 | { |
2746 | long frame_size = compute_frame_size (get_frame_size ()); | |
2747 | HOST_WIDE_INT offset; | |
2748 | ||
2749 | switch (from) | |
2750 | { | |
2751 | case FRAME_POINTER_REGNUM: | |
2752 | if (FRAME_GROWS_DOWNWARD) | |
2753 | offset = frame_size - (WINDOW_SIZE * UNITS_PER_WORD) | |
2754 | - cfun->machine->callee_save_size; | |
2755 | else | |
2756 | offset = 0; | |
2757 | break; | |
2758 | case ARG_POINTER_REGNUM: | |
2759 | offset = frame_size; | |
2760 | break; | |
2761 | default: | |
2762 | gcc_unreachable (); | |
2763 | } | |
2764 | ||
2765 | return offset; | |
2766 | } | |
03984308 | 2767 | |
7f0ee694 BW |
2768 | /* minimum frame = reg save area (4 words) plus static chain (1 word) |
2769 | and the total number of words must be a multiple of 128 bits. */ | |
2770 | #define MIN_FRAME_SIZE (8 * UNITS_PER_WORD) | |
2771 | ||
f42f5a1b | 2772 | void |
ffbc8796 | 2773 | xtensa_expand_prologue (void) |
f42f5a1b BW |
2774 | { |
2775 | HOST_WIDE_INT total_size; | |
590e2636 | 2776 | rtx_insn *insn = NULL; |
240a513f | 2777 | rtx note_rtx; |
18dbd950 | 2778 | |
590e2636 | 2779 | |
f42f5a1b | 2780 | total_size = compute_frame_size (get_frame_size ()); |
18dbd950 | 2781 | |
7695d1e3 MF |
2782 | if (flag_stack_usage_info) |
2783 | current_function_static_stack_size = total_size; | |
2784 | ||
590e2636 MF |
2785 | if (TARGET_WINDOWED_ABI) |
2786 | { | |
2787 | if (total_size < (1 << (12+3))) | |
2788 | insn = emit_insn (gen_entry (GEN_INT (total_size))); | |
2789 | else | |
2790 | { | |
2791 | /* Use a8 as a temporary since a0-a7 may be live. */ | |
2792 | rtx tmp_reg = gen_rtx_REG (Pmode, A8_REG); | |
2793 | emit_insn (gen_entry (GEN_INT (MIN_FRAME_SIZE))); | |
2794 | emit_move_insn (tmp_reg, GEN_INT (total_size - MIN_FRAME_SIZE)); | |
2795 | emit_insn (gen_subsi3 (tmp_reg, stack_pointer_rtx, tmp_reg)); | |
2796 | insn = emit_insn (gen_movsi (stack_pointer_rtx, tmp_reg)); | |
2797 | } | |
2798 | } | |
03984308 BW |
2799 | else |
2800 | { | |
590e2636 MF |
2801 | int regno; |
2802 | HOST_WIDE_INT offset = 0; | |
ad89d820 | 2803 | int callee_save_size = cfun->machine->callee_save_size; |
590e2636 MF |
2804 | |
2805 | /* -128 is a limit of single addi instruction. */ | |
2806 | if (total_size > 0 && total_size <= 128) | |
2807 | { | |
2808 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
2809 | GEN_INT (-total_size))); | |
2810 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2811 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
2812 | plus_constant (Pmode, stack_pointer_rtx, |
2813 | -total_size)); | |
2814 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2815 | offset = total_size - UNITS_PER_WORD; | |
2816 | } | |
ad89d820 | 2817 | else if (callee_save_size) |
590e2636 MF |
2818 | { |
2819 | /* 1020 is maximal s32i offset, if the frame is bigger than that | |
2820 | * we move sp to the end of callee-saved save area, save and then | |
2821 | * move it to its final location. */ | |
2822 | if (total_size > 1024) | |
2823 | { | |
2824 | insn = emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, | |
ad89d820 | 2825 | GEN_INT (-callee_save_size))); |
590e2636 | 2826 | RTX_FRAME_RELATED_P (insn) = 1; |
f7df4a84 | 2827 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 2828 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 2829 | -callee_save_size)); |
590e2636 | 2830 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); |
ad89d820 | 2831 | offset = callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
2832 | } |
2833 | else | |
2834 | { | |
2835 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
2836 | emit_move_insn (tmp_reg, GEN_INT (total_size)); | |
2837 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, | |
2838 | stack_pointer_rtx, tmp_reg)); | |
2839 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2840 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 MF |
2841 | plus_constant (Pmode, stack_pointer_rtx, |
2842 | -total_size)); | |
2843 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2844 | offset = total_size - UNITS_PER_WORD; | |
2845 | } | |
2846 | } | |
2847 | ||
2848 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
2849 | { | |
2850 | if (xtensa_call_save_reg(regno)) | |
2851 | { | |
2852 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
2853 | rtx mem = gen_frame_mem (SImode, x); | |
2854 | rtx reg = gen_rtx_REG (SImode, regno); | |
2855 | ||
2856 | offset -= UNITS_PER_WORD; | |
2857 | insn = emit_move_insn (mem, reg); | |
2858 | RTX_FRAME_RELATED_P (insn) = 1; | |
2859 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, | |
f7df4a84 | 2860 | gen_rtx_SET (mem, reg)); |
590e2636 MF |
2861 | } |
2862 | } | |
1fe39f19 MF |
2863 | if (total_size > 1024 |
2864 | || (!callee_save_size && total_size > 128)) | |
590e2636 MF |
2865 | { |
2866 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
2867 | emit_move_insn (tmp_reg, GEN_INT (total_size - | |
ad89d820 | 2868 | callee_save_size)); |
590e2636 MF |
2869 | insn = emit_insn (gen_subsi3 (stack_pointer_rtx, |
2870 | stack_pointer_rtx, tmp_reg)); | |
2871 | RTX_FRAME_RELATED_P (insn) = 1; | |
f7df4a84 | 2872 | note_rtx = gen_rtx_SET (stack_pointer_rtx, |
590e2636 | 2873 | plus_constant (Pmode, stack_pointer_rtx, |
ad89d820 | 2874 | callee_save_size - |
590e2636 MF |
2875 | total_size)); |
2876 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2877 | } | |
03984308 BW |
2878 | } |
2879 | ||
f42f5a1b | 2880 | if (frame_pointer_needed) |
03984308 | 2881 | { |
997b8b4d | 2882 | if (cfun->machine->set_frame_ptr_insn) |
03984308 | 2883 | { |
240a513f | 2884 | rtx_insn *first; |
03984308 | 2885 | |
997b8b4d BW |
2886 | push_topmost_sequence (); |
2887 | first = get_insns (); | |
2888 | pop_topmost_sequence (); | |
03984308 | 2889 | |
f42f5a1b BW |
2890 | /* For all instructions prior to set_frame_ptr_insn, replace |
2891 | hard_frame_pointer references with stack_pointer. */ | |
2892 | for (insn = first; | |
997b8b4d | 2893 | insn != cfun->machine->set_frame_ptr_insn; |
f42f5a1b BW |
2894 | insn = NEXT_INSN (insn)) |
2895 | { | |
2896 | if (INSN_P (insn)) | |
20dca97b BW |
2897 | { |
2898 | PATTERN (insn) = replace_rtx (copy_rtx (PATTERN (insn)), | |
2899 | hard_frame_pointer_rtx, | |
2900 | stack_pointer_rtx); | |
2901 | df_insn_rescan (insn); | |
2902 | } | |
f42f5a1b BW |
2903 | } |
2904 | } | |
2905 | else | |
590e2636 MF |
2906 | { |
2907 | insn = emit_insn (gen_movsi (hard_frame_pointer_rtx, | |
2908 | stack_pointer_rtx)); | |
2909 | if (!TARGET_WINDOWED_ABI) | |
2910 | { | |
f7df4a84 | 2911 | note_rtx = gen_rtx_SET (hard_frame_pointer_rtx, |
590e2636 MF |
2912 | stack_pointer_rtx); |
2913 | RTX_FRAME_RELATED_P (insn) = 1; | |
2914 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2915 | } | |
2916 | } | |
2917 | } | |
03984308 | 2918 | |
590e2636 MF |
2919 | if (TARGET_WINDOWED_ABI) |
2920 | { | |
2921 | /* Create a note to describe the CFA. Because this is only used to set | |
2922 | DW_AT_frame_base for debug info, don't bother tracking changes through | |
2923 | each instruction in the prologue. It just takes up space. */ | |
f7df4a84 RS |
2924 | note_rtx = gen_rtx_SET ((frame_pointer_needed |
2925 | ? hard_frame_pointer_rtx | |
2926 | : stack_pointer_rtx), | |
590e2636 MF |
2927 | plus_constant (Pmode, stack_pointer_rtx, |
2928 | -total_size)); | |
2929 | RTX_FRAME_RELATED_P (insn) = 1; | |
2930 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note_rtx); | |
2931 | } | |
2932 | } | |
03984308 BW |
2933 | |
2934 | void | |
590e2636 | 2935 | xtensa_expand_epilogue (void) |
03984308 | 2936 | { |
590e2636 MF |
2937 | if (!TARGET_WINDOWED_ABI) |
2938 | { | |
2939 | int regno; | |
2940 | HOST_WIDE_INT offset; | |
2941 | ||
ad89d820 | 2942 | if (cfun->machine->current_frame_size > (frame_pointer_needed ? 127 : 1024)) |
590e2636 MF |
2943 | { |
2944 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
2945 | emit_move_insn (tmp_reg, GEN_INT (cfun->machine->current_frame_size - |
2946 | cfun->machine->callee_save_size)); | |
590e2636 MF |
2947 | emit_insn (gen_addsi3 (stack_pointer_rtx, frame_pointer_needed ? |
2948 | hard_frame_pointer_rtx : stack_pointer_rtx, | |
2949 | tmp_reg)); | |
ad89d820 | 2950 | offset = cfun->machine->callee_save_size - UNITS_PER_WORD; |
590e2636 MF |
2951 | } |
2952 | else | |
2953 | { | |
2954 | if (frame_pointer_needed) | |
2955 | emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx); | |
ad89d820 | 2956 | offset = cfun->machine->current_frame_size - UNITS_PER_WORD; |
590e2636 MF |
2957 | } |
2958 | ||
2959 | /* Prevent reordering of saved a0 update and loading it back from | |
2960 | the save area. */ | |
2961 | if (crtl->calls_eh_return) | |
2962 | emit_insn (gen_blockage ()); | |
2963 | ||
2964 | for (regno = 0; regno < FIRST_PSEUDO_REGISTER; ++regno) | |
2965 | { | |
2966 | if (xtensa_call_save_reg(regno)) | |
2967 | { | |
2968 | rtx x = gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (offset)); | |
2969 | ||
2970 | offset -= UNITS_PER_WORD; | |
2971 | emit_move_insn (gen_rtx_REG (SImode, regno), | |
2972 | gen_frame_mem (SImode, x)); | |
2973 | } | |
2974 | } | |
2975 | ||
ad89d820 | 2976 | if (cfun->machine->current_frame_size > 0) |
590e2636 MF |
2977 | { |
2978 | if (frame_pointer_needed || /* always reachable with addi */ | |
ad89d820 MF |
2979 | cfun->machine->current_frame_size > 1024 || |
2980 | cfun->machine->current_frame_size <= 127) | |
590e2636 | 2981 | { |
ad89d820 MF |
2982 | if (cfun->machine->current_frame_size <= 127) |
2983 | offset = cfun->machine->current_frame_size; | |
590e2636 | 2984 | else |
ad89d820 | 2985 | offset = cfun->machine->callee_save_size; |
590e2636 MF |
2986 | |
2987 | emit_insn (gen_addsi3 (stack_pointer_rtx, | |
2988 | stack_pointer_rtx, | |
2989 | GEN_INT (offset))); | |
2990 | } | |
2991 | else | |
2992 | { | |
2993 | rtx tmp_reg = gen_rtx_REG (Pmode, A9_REG); | |
ad89d820 MF |
2994 | emit_move_insn (tmp_reg, |
2995 | GEN_INT (cfun->machine->current_frame_size)); | |
590e2636 MF |
2996 | emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, |
2997 | tmp_reg)); | |
2998 | } | |
2999 | } | |
3000 | ||
3001 | if (crtl->calls_eh_return) | |
3002 | emit_insn (gen_add3_insn (stack_pointer_rtx, | |
3003 | stack_pointer_rtx, | |
3004 | EH_RETURN_STACKADJ_RTX)); | |
3005 | } | |
ad89d820 | 3006 | cfun->machine->epilogue_done = true; |
590e2636 | 3007 | emit_jump_insn (gen_return ()); |
03984308 BW |
3008 | } |
3009 | ||
ad89d820 MF |
3010 | bool |
3011 | xtensa_use_return_instruction_p (void) | |
3012 | { | |
3013 | if (!reload_completed) | |
3014 | return false; | |
3015 | if (TARGET_WINDOWED_ABI) | |
3016 | return true; | |
3017 | if (compute_frame_size (get_frame_size ()) == 0) | |
3018 | return true; | |
3019 | return cfun->machine->epilogue_done; | |
3020 | } | |
3021 | ||
590e2636 MF |
3022 | void |
3023 | xtensa_set_return_address (rtx address, rtx scratch) | |
3024 | { | |
3025 | HOST_WIDE_INT total_size = compute_frame_size (get_frame_size ()); | |
3026 | rtx frame = frame_pointer_needed ? | |
3027 | hard_frame_pointer_rtx : stack_pointer_rtx; | |
3028 | rtx a0_addr = plus_constant (Pmode, frame, | |
3029 | total_size - UNITS_PER_WORD); | |
f7df4a84 | 3030 | rtx note = gen_rtx_SET (gen_frame_mem (SImode, a0_addr), |
590e2636 MF |
3031 | gen_rtx_REG (SImode, A0_REG)); |
3032 | rtx insn; | |
3033 | ||
3034 | if (total_size > 1024) { | |
3035 | emit_move_insn (scratch, GEN_INT (total_size - UNITS_PER_WORD)); | |
3036 | emit_insn (gen_addsi3 (scratch, frame, scratch)); | |
3037 | a0_addr = scratch; | |
3038 | } | |
3039 | ||
3040 | insn = emit_move_insn (gen_frame_mem (SImode, a0_addr), address); | |
3041 | RTX_FRAME_RELATED_P (insn) = 1; | |
3042 | add_reg_note (insn, REG_FRAME_RELATED_EXPR, note); | |
3043 | } | |
03984308 | 3044 | |
0c14a54d | 3045 | rtx |
ffbc8796 | 3046 | xtensa_return_addr (int count, rtx frame) |
0c14a54d | 3047 | { |
7f0ee694 | 3048 | rtx result, retaddr, curaddr, label; |
0c14a54d | 3049 | |
590e2636 MF |
3050 | if (!TARGET_WINDOWED_ABI) |
3051 | { | |
3052 | if (count != 0) | |
3053 | return const0_rtx; | |
3054 | ||
3055 | return get_hard_reg_initial_val (Pmode, A0_REG); | |
3056 | } | |
3057 | ||
0c14a54d | 3058 | if (count == -1) |
f42f5a1b | 3059 | retaddr = gen_rtx_REG (Pmode, A0_REG); |
0c14a54d BW |
3060 | else |
3061 | { | |
0a81f074 | 3062 | rtx addr = plus_constant (Pmode, frame, -4 * UNITS_PER_WORD); |
0c14a54d BW |
3063 | addr = memory_address (Pmode, addr); |
3064 | retaddr = gen_reg_rtx (Pmode); | |
3065 | emit_move_insn (retaddr, gen_rtx_MEM (Pmode, addr)); | |
3066 | } | |
3067 | ||
3068 | /* The 2 most-significant bits of the return address on Xtensa hold | |
3069 | the register window size. To get the real return address, these | |
7f0ee694 BW |
3070 | bits must be replaced with the high bits from some address in the |
3071 | code. */ | |
3072 | ||
3073 | /* Get the 2 high bits of a local label in the code. */ | |
3074 | curaddr = gen_reg_rtx (Pmode); | |
3075 | label = gen_label_rtx (); | |
3076 | emit_label (label); | |
3077 | LABEL_PRESERVE_P (label) = 1; | |
3078 | emit_move_insn (curaddr, gen_rtx_LABEL_REF (Pmode, label)); | |
3079 | emit_insn (gen_lshrsi3 (curaddr, curaddr, GEN_INT (30))); | |
3080 | emit_insn (gen_ashlsi3 (curaddr, curaddr, GEN_INT (30))); | |
3081 | ||
3082 | /* Clear the 2 high bits of the return address. */ | |
0c14a54d | 3083 | result = gen_reg_rtx (Pmode); |
7f0ee694 BW |
3084 | emit_insn (gen_ashlsi3 (result, retaddr, GEN_INT (2))); |
3085 | emit_insn (gen_lshrsi3 (result, result, GEN_INT (2))); | |
3086 | ||
3087 | /* Combine them to get the result. */ | |
3088 | emit_insn (gen_iorsi3 (result, result, curaddr)); | |
0c14a54d BW |
3089 | return result; |
3090 | } | |
3091 | ||
d9886a9e L |
3092 | /* Disable the use of word-sized or smaller complex modes for structures, |
3093 | and for function arguments in particular, where they cause problems with | |
3094 | register a7. The xtensa_copy_incoming_a7 function assumes that there is | |
3095 | a single reference to an argument in a7, but with small complex modes the | |
3096 | real and imaginary components may be extracted separately, leading to two | |
3097 | uses of the register, only one of which would be replaced. */ | |
3098 | ||
3099 | static bool | |
ef4bddc2 | 3100 | xtensa_member_type_forces_blk (const_tree, machine_mode mode) |
d9886a9e L |
3101 | { |
3102 | return mode == CQImode || mode == CHImode; | |
3103 | } | |
0c14a54d | 3104 | |
03984308 | 3105 | /* Create the va_list data type. |
822e895c BW |
3106 | |
3107 | This structure is set up by __builtin_saveregs. The __va_reg field | |
3108 | points to a stack-allocated region holding the contents of the | |
3109 | incoming argument registers. The __va_ndx field is an index | |
3110 | initialized to the position of the first unnamed (variable) | |
3111 | argument. This same index is also used to address the arguments | |
3112 | passed in memory. Thus, the __va_stk field is initialized to point | |
3113 | to the position of the first argument in memory offset to account | |
3114 | for the arguments passed in registers and to account for the size | |
3115 | of the argument registers not being 16-byte aligned. E.G., there | |
3116 | are 6 argument registers of 4 bytes each, but we want the __va_ndx | |
3117 | for the first stack argument to have the maximal alignment of 16 | |
3118 | bytes, so we offset the __va_stk address by 32 bytes so that | |
3119 | __va_stk[32] references the first argument on the stack. */ | |
03984308 | 3120 | |
c35d187f RH |
3121 | static tree |
3122 | xtensa_build_builtin_va_list (void) | |
03984308 | 3123 | { |
540eaea8 | 3124 | tree f_stk, f_reg, f_ndx, record, type_decl; |
03984308 | 3125 | |
540eaea8 | 3126 | record = (*lang_hooks.types.make_type) (RECORD_TYPE); |
4c4bde29 AH |
3127 | type_decl = build_decl (BUILTINS_LOCATION, |
3128 | TYPE_DECL, get_identifier ("__va_list_tag"), record); | |
03984308 | 3129 | |
4c4bde29 AH |
3130 | f_stk = build_decl (BUILTINS_LOCATION, |
3131 | FIELD_DECL, get_identifier ("__va_stk"), | |
03984308 | 3132 | ptr_type_node); |
4c4bde29 AH |
3133 | f_reg = build_decl (BUILTINS_LOCATION, |
3134 | FIELD_DECL, get_identifier ("__va_reg"), | |
03984308 | 3135 | ptr_type_node); |
4c4bde29 AH |
3136 | f_ndx = build_decl (BUILTINS_LOCATION, |
3137 | FIELD_DECL, get_identifier ("__va_ndx"), | |
03984308 BW |
3138 | integer_type_node); |
3139 | ||
3140 | DECL_FIELD_CONTEXT (f_stk) = record; | |
3141 | DECL_FIELD_CONTEXT (f_reg) = record; | |
3142 | DECL_FIELD_CONTEXT (f_ndx) = record; | |
3143 | ||
0fd2eac2 | 3144 | TYPE_STUB_DECL (record) = type_decl; |
540eaea8 | 3145 | TYPE_NAME (record) = type_decl; |
03984308 | 3146 | TYPE_FIELDS (record) = f_stk; |
910ad8de NF |
3147 | DECL_CHAIN (f_stk) = f_reg; |
3148 | DECL_CHAIN (f_reg) = f_ndx; | |
03984308 BW |
3149 | |
3150 | layout_type (record); | |
3151 | return record; | |
3152 | } | |
3153 | ||
3154 | ||
3155 | /* Save the incoming argument registers on the stack. Returns the | |
638db43e | 3156 | address of the saved registers. */ |
03984308 | 3157 | |
4c45af42 | 3158 | static rtx |
ffbc8796 | 3159 | xtensa_builtin_saveregs (void) |
03984308 | 3160 | { |
e70312d4 | 3161 | rtx gp_regs; |
38173d38 | 3162 | int arg_words = crtl->args.info.arg_words; |
03984308 | 3163 | int gp_left = MAX_ARGS_IN_REGISTERS - arg_words; |
03984308 | 3164 | |
997b8b4d | 3165 | if (gp_left <= 0) |
03984308 BW |
3166 | return const0_rtx; |
3167 | ||
3bbc2af6 | 3168 | /* Allocate the general-purpose register space. */ |
03984308 BW |
3169 | gp_regs = assign_stack_local |
3170 | (BLKmode, MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD, -1); | |
540eaea8 | 3171 | set_mem_alias_set (gp_regs, get_varargs_alias_set ()); |
03984308 BW |
3172 | |
3173 | /* Now store the incoming registers. */ | |
590e2636 | 3174 | cfun->machine->need_a7_copy = TARGET_WINDOWED_ABI; |
997b8b4d | 3175 | cfun->machine->vararg_a7 = true; |
e70312d4 BW |
3176 | move_block_from_reg (GP_ARG_FIRST + arg_words, |
3177 | adjust_address (gp_regs, BLKmode, | |
3178 | arg_words * UNITS_PER_WORD), | |
3179 | gp_left); | |
590e2636 MF |
3180 | if (cfun->machine->vararg_a7_copy != 0) |
3181 | emit_insn_before (cfun->machine->vararg_a7_copy, get_insns ()); | |
03984308 BW |
3182 | |
3183 | return XEXP (gp_regs, 0); | |
3184 | } | |
3185 | ||
3186 | ||
3187 | /* Implement `va_start' for varargs and stdarg. We look at the | |
638db43e | 3188 | current function to fill in an initial va_list. */ |
03984308 | 3189 | |
d7bd8aeb | 3190 | static void |
ffbc8796 | 3191 | xtensa_va_start (tree valist, rtx nextarg ATTRIBUTE_UNUSED) |
03984308 BW |
3192 | { |
3193 | tree f_stk, stk; | |
3194 | tree f_reg, reg; | |
3195 | tree f_ndx, ndx; | |
3196 | tree t, u; | |
3197 | int arg_words; | |
3198 | ||
38173d38 | 3199 | arg_words = crtl->args.info.arg_words; |
03984308 BW |
3200 | |
3201 | f_stk = TYPE_FIELDS (va_list_type_node); | |
910ad8de NF |
3202 | f_reg = DECL_CHAIN (f_stk); |
3203 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3204 | |
47a25a46 | 3205 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, f_stk, NULL_TREE); |
fa1615d7 BW |
3206 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), |
3207 | f_reg, NULL_TREE); | |
3208 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3209 | f_ndx, NULL_TREE); | |
03984308 BW |
3210 | |
3211 | /* Call __builtin_saveregs; save the result in __va_reg */ | |
e70312d4 BW |
3212 | u = make_tree (sizetype, expand_builtin_saveregs ()); |
3213 | u = fold_convert (ptr_type_node, u); | |
726a989a | 3214 | t = build2 (MODIFY_EXPR, ptr_type_node, reg, u); |
03984308 BW |
3215 | TREE_SIDE_EFFECTS (t) = 1; |
3216 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3217 | ||
822e895c | 3218 | /* Set the __va_stk member to ($arg_ptr - 32). */ |
03984308 | 3219 | u = make_tree (ptr_type_node, virtual_incoming_args_rtx); |
5d49b6a7 | 3220 | u = fold_build_pointer_plus_hwi (u, -32); |
726a989a | 3221 | t = build2 (MODIFY_EXPR, ptr_type_node, stk, u); |
03984308 BW |
3222 | TREE_SIDE_EFFECTS (t) = 1; |
3223 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3224 | ||
822e895c BW |
3225 | /* Set the __va_ndx member. If the first variable argument is on |
3226 | the stack, adjust __va_ndx by 2 words to account for the extra | |
3227 | alignment offset for __va_stk. */ | |
3228 | if (arg_words >= MAX_ARGS_IN_REGISTERS) | |
3229 | arg_words += 2; | |
726a989a | 3230 | t = build2 (MODIFY_EXPR, integer_type_node, ndx, |
f4d3e7fd | 3231 | build_int_cst (integer_type_node, arg_words * UNITS_PER_WORD)); |
03984308 BW |
3232 | TREE_SIDE_EFFECTS (t) = 1; |
3233 | expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL); | |
3234 | } | |
3235 | ||
3236 | ||
3237 | /* Implement `va_arg'. */ | |
3238 | ||
85d53c1d | 3239 | static tree |
726a989a RB |
3240 | xtensa_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p, |
3241 | gimple_seq *post_p ATTRIBUTE_UNUSED) | |
03984308 BW |
3242 | { |
3243 | tree f_stk, stk; | |
3244 | tree f_reg, reg; | |
3245 | tree f_ndx, ndx; | |
85d53c1d RH |
3246 | tree type_size, array, orig_ndx, addr, size, va_size, t; |
3247 | tree lab_false, lab_over, lab_false2; | |
08b0dc1b RH |
3248 | bool indirect; |
3249 | ||
fde65a89 | 3250 | indirect = pass_va_arg_by_reference (type); |
08b0dc1b RH |
3251 | if (indirect) |
3252 | type = build_pointer_type (type); | |
03984308 | 3253 | |
3712281f BW |
3254 | /* Handle complex values as separate real and imaginary parts. */ |
3255 | if (TREE_CODE (type) == COMPLEX_TYPE) | |
3256 | { | |
85d53c1d | 3257 | tree real_part, imag_part; |
3712281f | 3258 | |
85d53c1d RH |
3259 | real_part = xtensa_gimplify_va_arg_expr (valist, TREE_TYPE (type), |
3260 | pre_p, NULL); | |
3261 | real_part = get_initialized_tmp_var (real_part, pre_p, NULL); | |
3712281f | 3262 | |
fa1615d7 BW |
3263 | imag_part = xtensa_gimplify_va_arg_expr (unshare_expr (valist), |
3264 | TREE_TYPE (type), | |
85d53c1d RH |
3265 | pre_p, NULL); |
3266 | imag_part = get_initialized_tmp_var (imag_part, pre_p, NULL); | |
3712281f | 3267 | |
47a25a46 | 3268 | return build2 (COMPLEX_EXPR, type, real_part, imag_part); |
3712281f BW |
3269 | } |
3270 | ||
03984308 | 3271 | f_stk = TYPE_FIELDS (va_list_type_node); |
910ad8de NF |
3272 | f_reg = DECL_CHAIN (f_stk); |
3273 | f_ndx = DECL_CHAIN (f_reg); | |
03984308 | 3274 | |
fa1615d7 BW |
3275 | stk = build3 (COMPONENT_REF, TREE_TYPE (f_stk), valist, |
3276 | f_stk, NULL_TREE); | |
3277 | reg = build3 (COMPONENT_REF, TREE_TYPE (f_reg), unshare_expr (valist), | |
3278 | f_reg, NULL_TREE); | |
3279 | ndx = build3 (COMPONENT_REF, TREE_TYPE (f_ndx), unshare_expr (valist), | |
3280 | f_ndx, NULL_TREE); | |
03984308 | 3281 | |
85d53c1d RH |
3282 | type_size = size_in_bytes (type); |
3283 | va_size = round_up (type_size, UNITS_PER_WORD); | |
3284 | gimplify_expr (&va_size, pre_p, NULL, is_gimple_val, fb_rvalue); | |
8be56275 | 3285 | |
03984308 | 3286 | |
822e895c | 3287 | /* First align __va_ndx if necessary for this arg: |
03984308 | 3288 | |
85d53c1d | 3289 | orig_ndx = (AP).__va_ndx; |
822e895c | 3290 | if (__alignof__ (TYPE) > 4 ) |
85d53c1d | 3291 | orig_ndx = ((orig_ndx + __alignof__ (TYPE) - 1) |
822e895c | 3292 | & -__alignof__ (TYPE)); */ |
03984308 | 3293 | |
85d53c1d RH |
3294 | orig_ndx = get_initialized_tmp_var (ndx, pre_p, NULL); |
3295 | ||
03984308 BW |
3296 | if (TYPE_ALIGN (type) > BITS_PER_WORD) |
3297 | { | |
d2348985 | 3298 | int align = MIN (TYPE_ALIGN (type), STACK_BOUNDARY) / BITS_PER_UNIT; |
85d53c1d | 3299 | |
fa1615d7 | 3300 | t = build2 (PLUS_EXPR, integer_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3301 | build_int_cst (integer_type_node, align - 1)); |
3302 | t = build2 (BIT_AND_EXPR, integer_type_node, t, | |
3303 | build_int_cst (integer_type_node, -align)); | |
fa1615d7 | 3304 | gimplify_assign (unshare_expr (orig_ndx), t, pre_p); |
03984308 BW |
3305 | } |
3306 | ||
3307 | ||
3308 | /* Increment __va_ndx to point past the argument: | |
3309 | ||
85d53c1d | 3310 | (AP).__va_ndx = orig_ndx + __va_size (TYPE); */ |
03984308 | 3311 | |
85d53c1d | 3312 | t = fold_convert (integer_type_node, va_size); |
47a25a46 | 3313 | t = build2 (PLUS_EXPR, integer_type_node, orig_ndx, t); |
fa1615d7 | 3314 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 BW |
3315 | |
3316 | ||
3317 | /* Check if the argument is in registers: | |
3318 | ||
bcf88f9b | 3319 | if ((AP).__va_ndx <= __MAX_ARGS_IN_REGISTERS * 4 |
fe984136 | 3320 | && !must_pass_in_stack (type)) |
ffbc8796 | 3321 | __array = (AP).__va_reg; */ |
03984308 | 3322 | |
9b489f31 | 3323 | array = create_tmp_var (ptr_type_node); |
03984308 | 3324 | |
85d53c1d | 3325 | lab_over = NULL; |
4f53599c | 3326 | if (!must_pass_va_arg_in_stack (type)) |
bcf88f9b | 3327 | { |
4c4bde29 AH |
3328 | lab_false = create_artificial_label (UNKNOWN_LOCATION); |
3329 | lab_over = create_artificial_label (UNKNOWN_LOCATION); | |
85d53c1d | 3330 | |
fa1615d7 | 3331 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (ndx), |
f4d3e7fd BW |
3332 | build_int_cst (integer_type_node, |
3333 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3334 | t = build3 (COND_EXPR, void_type_node, t, |
3335 | build1 (GOTO_EXPR, void_type_node, lab_false), | |
3336 | NULL_TREE); | |
85d53c1d RH |
3337 | gimplify_and_add (t, pre_p); |
3338 | ||
fa1615d7 | 3339 | gimplify_assign (unshare_expr (array), reg, pre_p); |
85d53c1d | 3340 | |
47a25a46 | 3341 | t = build1 (GOTO_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3342 | gimplify_and_add (t, pre_p); |
3343 | ||
47a25a46 | 3344 | t = build1 (LABEL_EXPR, void_type_node, lab_false); |
85d53c1d | 3345 | gimplify_and_add (t, pre_p); |
bcf88f9b | 3346 | } |
03984308 | 3347 | |
85d53c1d | 3348 | |
03984308 BW |
3349 | /* ...otherwise, the argument is on the stack (never split between |
3350 | registers and the stack -- change __va_ndx if necessary): | |
3351 | ||
3352 | else | |
3353 | { | |
822e895c BW |
3354 | if (orig_ndx <= __MAX_ARGS_IN_REGISTERS * 4) |
3355 | (AP).__va_ndx = 32 + __va_size (TYPE); | |
03984308 | 3356 | __array = (AP).__va_stk; |
ffbc8796 | 3357 | } */ |
03984308 | 3358 | |
4c4bde29 | 3359 | lab_false2 = create_artificial_label (UNKNOWN_LOCATION); |
03984308 | 3360 | |
fa1615d7 | 3361 | t = build2 (GT_EXPR, boolean_type_node, unshare_expr (orig_ndx), |
f4d3e7fd BW |
3362 | build_int_cst (integer_type_node, |
3363 | MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD)); | |
47a25a46 RG |
3364 | t = build3 (COND_EXPR, void_type_node, t, |
3365 | build1 (GOTO_EXPR, void_type_node, lab_false2), | |
3366 | NULL_TREE); | |
85d53c1d | 3367 | gimplify_and_add (t, pre_p); |
03984308 | 3368 | |
fa1615d7 | 3369 | t = size_binop (PLUS_EXPR, unshare_expr (va_size), size_int (32)); |
85d53c1d | 3370 | t = fold_convert (integer_type_node, t); |
fa1615d7 | 3371 | gimplify_assign (unshare_expr (ndx), t, pre_p); |
03984308 | 3372 | |
47a25a46 | 3373 | t = build1 (LABEL_EXPR, void_type_node, lab_false2); |
85d53c1d | 3374 | gimplify_and_add (t, pre_p); |
03984308 | 3375 | |
726a989a | 3376 | gimplify_assign (array, stk, pre_p); |
85d53c1d RH |
3377 | |
3378 | if (lab_over) | |
3379 | { | |
47a25a46 | 3380 | t = build1 (LABEL_EXPR, void_type_node, lab_over); |
85d53c1d RH |
3381 | gimplify_and_add (t, pre_p); |
3382 | } | |
8be56275 | 3383 | |
03984308 BW |
3384 | |
3385 | /* Given the base array pointer (__array) and index to the subsequent | |
3386 | argument (__va_ndx), find the address: | |
3387 | ||
8be56275 BW |
3388 | __array + (AP).__va_ndx - (BYTES_BIG_ENDIAN && sizeof (TYPE) < 4 |
3389 | ? sizeof (TYPE) | |
3390 | : __va_size (TYPE)) | |
03984308 BW |
3391 | |
3392 | The results are endian-dependent because values smaller than one word | |
ffbc8796 | 3393 | are aligned differently. */ |
03984308 | 3394 | |
633e4eb4 | 3395 | |
85d91d5b | 3396 | if (BYTES_BIG_ENDIAN && TREE_CODE (type_size) == INTEGER_CST) |
8be56275 | 3397 | { |
fa1615d7 | 3398 | t = fold_build2 (GE_EXPR, boolean_type_node, unshare_expr (type_size), |
e70312d4 | 3399 | size_int (PARM_BOUNDARY / BITS_PER_UNIT)); |
fa1615d7 BW |
3400 | t = fold_build3 (COND_EXPR, sizetype, t, unshare_expr (va_size), |
3401 | unshare_expr (type_size)); | |
85d53c1d | 3402 | size = t; |
8be56275 | 3403 | } |
85d53c1d | 3404 | else |
fa1615d7 | 3405 | size = unshare_expr (va_size); |
85d53c1d | 3406 | |
fa1615d7 | 3407 | t = fold_convert (sizetype, unshare_expr (ndx)); |
f4d3e7fd | 3408 | t = build2 (MINUS_EXPR, sizetype, t, size); |
5d49b6a7 | 3409 | addr = fold_build_pointer_plus (unshare_expr (array), t); |
03984308 | 3410 | |
85d53c1d | 3411 | addr = fold_convert (build_pointer_type (type), addr); |
08b0dc1b | 3412 | if (indirect) |
d6e9821f RH |
3413 | addr = build_va_arg_indirect_ref (addr); |
3414 | return build_va_arg_indirect_ref (addr); | |
03984308 BW |
3415 | } |
3416 | ||
3417 | ||
09fa8841 BW |
3418 | /* Builtins. */ |
3419 | ||
3420 | enum xtensa_builtin | |
3421 | { | |
3422 | XTENSA_BUILTIN_UMULSIDI3, | |
3423 | XTENSA_BUILTIN_max | |
3424 | }; | |
3425 | ||
3426 | ||
3427 | static void | |
3428 | xtensa_init_builtins (void) | |
3429 | { | |
6a7a462c | 3430 | tree ftype, decl; |
09fa8841 BW |
3431 | |
3432 | ftype = build_function_type_list (unsigned_intDI_type_node, | |
3433 | unsigned_intSI_type_node, | |
3434 | unsigned_intSI_type_node, NULL_TREE); | |
3435 | ||
6a7a462c BW |
3436 | decl = add_builtin_function ("__builtin_umulsidi3", ftype, |
3437 | XTENSA_BUILTIN_UMULSIDI3, BUILT_IN_MD, | |
3438 | "__umulsidi3", NULL_TREE); | |
3439 | TREE_NOTHROW (decl) = 1; | |
3440 | TREE_READONLY (decl) = 1; | |
09fa8841 BW |
3441 | } |
3442 | ||
3443 | ||
3444 | static tree | |
f311c3b4 NF |
3445 | xtensa_fold_builtin (tree fndecl, int n_args ATTRIBUTE_UNUSED, tree *args, |
3446 | bool ignore ATTRIBUTE_UNUSED) | |
09fa8841 | 3447 | { |
4d732405 | 3448 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
09fa8841 BW |
3449 | tree arg0, arg1; |
3450 | ||
6a7a462c | 3451 | switch (fcode) |
09fa8841 | 3452 | { |
6a7a462c | 3453 | case XTENSA_BUILTIN_UMULSIDI3: |
f311c3b4 NF |
3454 | arg0 = args[0]; |
3455 | arg1 = args[1]; | |
09fa8841 BW |
3456 | if ((TREE_CODE (arg0) == INTEGER_CST && TREE_CODE (arg1) == INTEGER_CST) |
3457 | || TARGET_MUL32_HIGH) | |
3458 | return fold_build2 (MULT_EXPR, unsigned_intDI_type_node, | |
3459 | fold_convert (unsigned_intDI_type_node, arg0), | |
3460 | fold_convert (unsigned_intDI_type_node, arg1)); | |
6a7a462c BW |
3461 | break; |
3462 | ||
6a7a462c BW |
3463 | default: |
3464 | internal_error ("bad builtin code"); | |
3465 | break; | |
09fa8841 BW |
3466 | } |
3467 | ||
09fa8841 BW |
3468 | return NULL; |
3469 | } | |
3470 | ||
3471 | ||
3472 | static rtx | |
3473 | xtensa_expand_builtin (tree exp, rtx target, | |
3474 | rtx subtarget ATTRIBUTE_UNUSED, | |
ef4bddc2 | 3475 | machine_mode mode ATTRIBUTE_UNUSED, |
09fa8841 BW |
3476 | int ignore) |
3477 | { | |
ec3643e8 | 3478 | tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0); |
4d732405 | 3479 | unsigned int fcode = DECL_MD_FUNCTION_CODE (fndecl); |
6a7a462c BW |
3480 | |
3481 | switch (fcode) | |
3482 | { | |
3483 | case XTENSA_BUILTIN_UMULSIDI3: | |
3484 | /* The umulsidi3 builtin is just a mechanism to avoid calling the real | |
3485 | __umulsidi3 function when the Xtensa configuration can directly | |
3486 | implement it. If not, just call the function. */ | |
3487 | return expand_call (exp, target, ignore); | |
09fa8841 | 3488 | |
6a7a462c BW |
3489 | default: |
3490 | internal_error ("bad builtin code"); | |
3491 | } | |
09fa8841 BW |
3492 | return NULL_RTX; |
3493 | } | |
3494 | ||
a6e508f9 | 3495 | /* Worker function for TARGET_PREFERRED_RELOAD_CLASS. */ |
09fa8841 | 3496 | |
a6e508f9 AS |
3497 | static reg_class_t |
3498 | xtensa_preferred_reload_class (rtx x, reg_class_t rclass) | |
a8cacfd2 | 3499 | { |
a6e508f9 | 3500 | if (CONSTANT_P (x) && CONST_DOUBLE_P (x)) |
a8cacfd2 BW |
3501 | return NO_REGS; |
3502 | ||
89f6025d BW |
3503 | /* Don't use the stack pointer or hard frame pointer for reloads! |
3504 | The hard frame pointer would normally be OK except that it may | |
3505 | briefly hold an incoming argument in the prologue, and reload | |
3506 | won't know that it is live because the hard frame pointer is | |
3507 | treated specially. */ | |
3508 | ||
0a2aaacc | 3509 | if (rclass == AR_REGS || rclass == GR_REGS) |
89f6025d | 3510 | return RL_REGS; |
a8cacfd2 | 3511 | |
0a2aaacc | 3512 | return rclass; |
a8cacfd2 BW |
3513 | } |
3514 | ||
a6e508f9 AS |
3515 | /* Worker function for TARGET_PREFERRED_OUTPUT_RELOAD_CLASS. */ |
3516 | ||
3517 | static reg_class_t | |
3518 | xtensa_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED, | |
3519 | reg_class_t rclass) | |
3520 | { | |
3521 | /* Don't use the stack pointer or hard frame pointer for reloads! | |
3522 | The hard frame pointer would normally be OK except that it may | |
3523 | briefly hold an incoming argument in the prologue, and reload | |
3524 | won't know that it is live because the hard frame pointer is | |
3525 | treated specially. */ | |
3526 | ||
3527 | if (rclass == AR_REGS || rclass == GR_REGS) | |
3528 | return RL_REGS; | |
3529 | ||
3530 | return rclass; | |
3531 | } | |
3532 | ||
3533 | /* Worker function for TARGET_SECONDARY_RELOAD. */ | |
a8cacfd2 | 3534 | |
a6e508f9 | 3535 | static reg_class_t |
a87cf97e | 3536 | xtensa_secondary_reload (bool in_p, rtx x, reg_class_t rclass, |
ef4bddc2 | 3537 | machine_mode mode, secondary_reload_info *sri) |
03984308 BW |
3538 | { |
3539 | int regno; | |
3540 | ||
37fbe8a3 | 3541 | if (in_p && constantpool_mem_p (x)) |
03984308 | 3542 | { |
37fbe8a3 | 3543 | if (rclass == FP_REGS) |
89f6025d | 3544 | return RL_REGS; |
37fbe8a3 BW |
3545 | |
3546 | if (mode == QImode) | |
3547 | sri->icode = CODE_FOR_reloadqi_literal; | |
3548 | else if (mode == HImode) | |
3549 | sri->icode = CODE_FOR_reloadhi_literal; | |
03984308 BW |
3550 | } |
3551 | ||
37fbe8a3 | 3552 | regno = xt_true_regnum (x); |
03984308 | 3553 | if (ACC_REG_P (regno)) |
0a2aaacc KG |
3554 | return ((rclass == GR_REGS || rclass == RL_REGS) ? NO_REGS : RL_REGS); |
3555 | if (rclass == ACC_REG) | |
89f6025d | 3556 | return (GP_REG_P (regno) ? NO_REGS : RL_REGS); |
03984308 BW |
3557 | |
3558 | return NO_REGS; | |
3559 | } | |
3560 | ||
3561 | ||
3562 | void | |
ffbc8796 | 3563 | order_regs_for_local_alloc (void) |
03984308 BW |
3564 | { |
3565 | if (!leaf_function_p ()) | |
3566 | { | |
590e2636 MF |
3567 | static const int reg_nonleaf_alloc_order[FIRST_PSEUDO_REGISTER] = |
3568 | REG_ALLOC_ORDER; | |
3569 | static const int reg_nonleaf_alloc_order_call0[FIRST_PSEUDO_REGISTER] = | |
3570 | { | |
3571 | 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 12, 13, 14, 15, | |
3572 | 18, | |
3573 | 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, | |
3574 | 0, 1, 16, 17, | |
3575 | 35, | |
3576 | }; | |
3577 | ||
3578 | memcpy (reg_alloc_order, TARGET_WINDOWED_ABI ? | |
3579 | reg_nonleaf_alloc_order : reg_nonleaf_alloc_order_call0, | |
03984308 BW |
3580 | FIRST_PSEUDO_REGISTER * sizeof (int)); |
3581 | } | |
3582 | else | |
3583 | { | |
3584 | int i, num_arg_regs; | |
3585 | int nxt = 0; | |
3586 | ||
3bbc2af6 KH |
3587 | /* Use the AR registers in increasing order (skipping a0 and a1) |
3588 | but save the incoming argument registers for a last resort. */ | |
38173d38 | 3589 | num_arg_regs = crtl->args.info.arg_words; |
03984308 BW |
3590 | if (num_arg_regs > MAX_ARGS_IN_REGISTERS) |
3591 | num_arg_regs = MAX_ARGS_IN_REGISTERS; | |
3592 | for (i = GP_ARG_FIRST; i < 16 - num_arg_regs; i++) | |
3593 | reg_alloc_order[nxt++] = i + num_arg_regs; | |
3594 | for (i = 0; i < num_arg_regs; i++) | |
3595 | reg_alloc_order[nxt++] = GP_ARG_FIRST + i; | |
3596 | ||
3bbc2af6 | 3597 | /* List the coprocessor registers in order. */ |
985d0d50 BW |
3598 | for (i = 0; i < BR_REG_NUM; i++) |
3599 | reg_alloc_order[nxt++] = BR_REG_FIRST + i; | |
3600 | ||
3bbc2af6 | 3601 | /* List the FP registers in order for now. */ |
03984308 BW |
3602 | for (i = 0; i < 16; i++) |
3603 | reg_alloc_order[nxt++] = FP_REG_FIRST + i; | |
3604 | ||
638db43e | 3605 | /* GCC requires that we list *all* the registers.... */ |
03984308 BW |
3606 | reg_alloc_order[nxt++] = 0; /* a0 = return address */ |
3607 | reg_alloc_order[nxt++] = 1; /* a1 = stack pointer */ | |
3608 | reg_alloc_order[nxt++] = 16; /* pseudo frame pointer */ | |
3609 | reg_alloc_order[nxt++] = 17; /* pseudo arg pointer */ | |
3610 | ||
03984308 BW |
3611 | reg_alloc_order[nxt++] = ACC_REG_FIRST; /* MAC16 accumulator */ |
3612 | } | |
3613 | } | |
3614 | ||
3615 | ||
01abf342 BW |
3616 | /* Some Xtensa targets support multiple bss sections. If the section |
3617 | name ends with ".bss", add SECTION_BSS to the flags. */ | |
3618 | ||
3619 | static unsigned int | |
ffbc8796 | 3620 | xtensa_multibss_section_type_flags (tree decl, const char *name, int reloc) |
01abf342 BW |
3621 | { |
3622 | unsigned int flags = default_section_type_flags (decl, name, reloc); | |
3623 | const char *suffix; | |
3624 | ||
3625 | suffix = strrchr (name, '.'); | |
3626 | if (suffix && strcmp (suffix, ".bss") == 0) | |
3627 | { | |
3628 | if (!decl || (TREE_CODE (decl) == VAR_DECL | |
3629 | && DECL_INITIAL (decl) == NULL_TREE)) | |
3630 | flags |= SECTION_BSS; /* @nobits */ | |
3631 | else | |
d4ee4d25 | 3632 | warning (0, "only uninitialized variables can be placed in a " |
01abf342 BW |
3633 | ".bss section"); |
3634 | } | |
3635 | ||
3636 | return flags; | |
3637 | } | |
3638 | ||
3639 | ||
b64a1b53 RH |
3640 | /* The literal pool stays with the function. */ |
3641 | ||
d6b5193b | 3642 | static section * |
ef4bddc2 | 3643 | xtensa_select_rtx_section (machine_mode mode ATTRIBUTE_UNUSED, |
ffbc8796 BW |
3644 | rtx x ATTRIBUTE_UNUSED, |
3645 | unsigned HOST_WIDE_INT align ATTRIBUTE_UNUSED) | |
b64a1b53 | 3646 | { |
d6b5193b | 3647 | return function_section (current_function_decl); |
b64a1b53 | 3648 | } |
fb49053f | 3649 | |
5378dda2 AS |
3650 | /* Worker function for TARGET_REGISTER_MOVE_COST. */ |
3651 | ||
3652 | static int | |
ef4bddc2 | 3653 | xtensa_register_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3654 | reg_class_t from, reg_class_t to) |
3655 | { | |
3656 | if (from == to && from != BR_REGS && to != BR_REGS) | |
3657 | return 2; | |
3658 | else if (reg_class_subset_p (from, AR_REGS) | |
3659 | && reg_class_subset_p (to, AR_REGS)) | |
3660 | return 2; | |
3661 | else if (reg_class_subset_p (from, AR_REGS) && to == ACC_REG) | |
3662 | return 3; | |
3663 | else if (from == ACC_REG && reg_class_subset_p (to, AR_REGS)) | |
3664 | return 3; | |
3665 | else | |
3666 | return 10; | |
3667 | } | |
3668 | ||
3669 | /* Worker function for TARGET_MEMORY_MOVE_COST. */ | |
3670 | ||
3671 | static int | |
ef4bddc2 | 3672 | xtensa_memory_move_cost (machine_mode mode ATTRIBUTE_UNUSED, |
5378dda2 AS |
3673 | reg_class_t rclass ATTRIBUTE_UNUSED, |
3674 | bool in ATTRIBUTE_UNUSED) | |
3675 | { | |
3676 | return 4; | |
3677 | } | |
ffbc8796 | 3678 | |
3c50106f RH |
3679 | /* Compute a (partial) cost for rtx X. Return true if the complete |
3680 | cost has been computed, and false if subexpressions should be | |
3681 | scanned. In either case, *TOTAL contains the cost result. */ | |
3682 | ||
3683 | static bool | |
e548c9df AM |
3684 | xtensa_rtx_costs (rtx x, machine_mode mode, int outer_code, |
3685 | int opno ATTRIBUTE_UNUSED, | |
68f932c4 | 3686 | int *total, bool speed ATTRIBUTE_UNUSED) |
3c50106f | 3687 | { |
e548c9df AM |
3688 | int code = GET_CODE (x); |
3689 | ||
3c50106f RH |
3690 | switch (code) |
3691 | { | |
3692 | case CONST_INT: | |
3693 | switch (outer_code) | |
3694 | { | |
3695 | case SET: | |
3696 | if (xtensa_simm12b (INTVAL (x))) | |
3697 | { | |
3698 | *total = 4; | |
3699 | return true; | |
3700 | } | |
3701 | break; | |
3702 | case PLUS: | |
3703 | if (xtensa_simm8 (INTVAL (x)) | |
3704 | || xtensa_simm8x256 (INTVAL (x))) | |
3705 | { | |
3706 | *total = 0; | |
3707 | return true; | |
3708 | } | |
3709 | break; | |
3710 | case AND: | |
3711 | if (xtensa_mask_immediate (INTVAL (x))) | |
3712 | { | |
3713 | *total = 0; | |
3714 | return true; | |
3715 | } | |
3716 | break; | |
3717 | case COMPARE: | |
3718 | if ((INTVAL (x) == 0) || xtensa_b4const (INTVAL (x))) | |
3719 | { | |
3720 | *total = 0; | |
3721 | return true; | |
3722 | } | |
3723 | break; | |
3724 | case ASHIFT: | |
3725 | case ASHIFTRT: | |
3726 | case LSHIFTRT: | |
3727 | case ROTATE: | |
3728 | case ROTATERT: | |
3bbc2af6 | 3729 | /* No way to tell if X is the 2nd operand so be conservative. */ |
3c50106f RH |
3730 | default: break; |
3731 | } | |
3732 | if (xtensa_simm12b (INTVAL (x))) | |
3733 | *total = 5; | |
f42f5a1b BW |
3734 | else if (TARGET_CONST16) |
3735 | *total = COSTS_N_INSNS (2); | |
3c50106f RH |
3736 | else |
3737 | *total = 6; | |
3738 | return true; | |
3739 | ||
3740 | case CONST: | |
3741 | case LABEL_REF: | |
3742 | case SYMBOL_REF: | |
f42f5a1b BW |
3743 | if (TARGET_CONST16) |
3744 | *total = COSTS_N_INSNS (2); | |
3745 | else | |
3746 | *total = 5; | |
3c50106f RH |
3747 | return true; |
3748 | ||
3749 | case CONST_DOUBLE: | |
f42f5a1b BW |
3750 | if (TARGET_CONST16) |
3751 | *total = COSTS_N_INSNS (4); | |
3752 | else | |
3753 | *total = 7; | |
3c50106f RH |
3754 | return true; |
3755 | ||
3756 | case MEM: | |
3757 | { | |
3758 | int num_words = | |
e548c9df | 3759 | (GET_MODE_SIZE (mode) > UNITS_PER_WORD) ? 2 : 1; |
3c50106f | 3760 | |
e548c9df | 3761 | if (memory_address_p (mode, XEXP ((x), 0))) |
3c50106f RH |
3762 | *total = COSTS_N_INSNS (num_words); |
3763 | else | |
3764 | *total = COSTS_N_INSNS (2*num_words); | |
3765 | return true; | |
3766 | } | |
3767 | ||
3768 | case FFS: | |
09fa8841 | 3769 | case CTZ: |
3c50106f RH |
3770 | *total = COSTS_N_INSNS (TARGET_NSA ? 5 : 50); |
3771 | return true; | |
3772 | ||
09fa8841 BW |
3773 | case CLZ: |
3774 | *total = COSTS_N_INSNS (TARGET_NSA ? 1 : 50); | |
3775 | return true; | |
3776 | ||
3c50106f | 3777 | case NOT: |
e548c9df | 3778 | *total = COSTS_N_INSNS (mode == DImode ? 3 : 2); |
3c50106f RH |
3779 | return true; |
3780 | ||
3781 | case AND: | |
3782 | case IOR: | |
3783 | case XOR: | |
e548c9df | 3784 | if (mode == DImode) |
3c50106f RH |
3785 | *total = COSTS_N_INSNS (2); |
3786 | else | |
3787 | *total = COSTS_N_INSNS (1); | |
3788 | return true; | |
3789 | ||
3790 | case ASHIFT: | |
3791 | case ASHIFTRT: | |
3792 | case LSHIFTRT: | |
e548c9df | 3793 | if (mode == DImode) |
3c50106f RH |
3794 | *total = COSTS_N_INSNS (50); |
3795 | else | |
3796 | *total = COSTS_N_INSNS (1); | |
3797 | return true; | |
3798 | ||
3799 | case ABS: | |
3800 | { | |
e548c9df | 3801 | if (mode == SFmode) |
3c50106f | 3802 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 3803 | else if (mode == DFmode) |
3c50106f RH |
3804 | *total = COSTS_N_INSNS (50); |
3805 | else | |
3806 | *total = COSTS_N_INSNS (4); | |
3807 | return true; | |
3808 | } | |
3809 | ||
3810 | case PLUS: | |
3811 | case MINUS: | |
3812 | { | |
e548c9df | 3813 | if (mode == SFmode) |
3c50106f | 3814 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 1 : 50); |
e548c9df | 3815 | else if (mode == DFmode || mode == DImode) |
3c50106f RH |
3816 | *total = COSTS_N_INSNS (50); |
3817 | else | |
3818 | *total = COSTS_N_INSNS (1); | |
3819 | return true; | |
3820 | } | |
3821 | ||
3822 | case NEG: | |
e548c9df | 3823 | *total = COSTS_N_INSNS (mode == DImode ? 4 : 2); |
3c50106f RH |
3824 | return true; |
3825 | ||
3826 | case MULT: | |
3827 | { | |
e548c9df | 3828 | if (mode == SFmode) |
3c50106f | 3829 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT ? 4 : 50); |
e548c9df | 3830 | else if (mode == DFmode) |
3c50106f | 3831 | *total = COSTS_N_INSNS (50); |
e548c9df | 3832 | else if (mode == DImode) |
09fa8841 | 3833 | *total = COSTS_N_INSNS (TARGET_MUL32_HIGH ? 10 : 50); |
3c50106f RH |
3834 | else if (TARGET_MUL32) |
3835 | *total = COSTS_N_INSNS (4); | |
3836 | else if (TARGET_MAC16) | |
3837 | *total = COSTS_N_INSNS (16); | |
3838 | else if (TARGET_MUL16) | |
3839 | *total = COSTS_N_INSNS (12); | |
3840 | else | |
3841 | *total = COSTS_N_INSNS (50); | |
3842 | return true; | |
3843 | } | |
3844 | ||
3845 | case DIV: | |
3846 | case MOD: | |
3847 | { | |
e548c9df | 3848 | if (mode == SFmode) |
3c50106f RH |
3849 | { |
3850 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_DIV ? 8 : 50); | |
3851 | return true; | |
3852 | } | |
e548c9df | 3853 | else if (mode == DFmode) |
3c50106f RH |
3854 | { |
3855 | *total = COSTS_N_INSNS (50); | |
3856 | return true; | |
3857 | } | |
3858 | } | |
3bbc2af6 | 3859 | /* Fall through. */ |
3c50106f RH |
3860 | |
3861 | case UDIV: | |
3862 | case UMOD: | |
3863 | { | |
e548c9df | 3864 | if (mode == DImode) |
3c50106f RH |
3865 | *total = COSTS_N_INSNS (50); |
3866 | else if (TARGET_DIV32) | |
3867 | *total = COSTS_N_INSNS (32); | |
3868 | else | |
3869 | *total = COSTS_N_INSNS (50); | |
3870 | return true; | |
3871 | } | |
3872 | ||
3873 | case SQRT: | |
e548c9df | 3874 | if (mode == SFmode) |
3c50106f RH |
3875 | *total = COSTS_N_INSNS (TARGET_HARD_FLOAT_SQRT ? 8 : 50); |
3876 | else | |
3877 | *total = COSTS_N_INSNS (50); | |
3878 | return true; | |
3879 | ||
3880 | case SMIN: | |
3881 | case UMIN: | |
3882 | case SMAX: | |
3883 | case UMAX: | |
3884 | *total = COSTS_N_INSNS (TARGET_MINMAX ? 1 : 50); | |
3885 | return true; | |
3886 | ||
3887 | case SIGN_EXTRACT: | |
3888 | case SIGN_EXTEND: | |
3889 | *total = COSTS_N_INSNS (TARGET_SEXT ? 1 : 2); | |
3890 | return true; | |
3891 | ||
3892 | case ZERO_EXTRACT: | |
3893 | case ZERO_EXTEND: | |
3894 | *total = COSTS_N_INSNS (1); | |
3895 | return true; | |
3896 | ||
3897 | default: | |
3898 | return false; | |
3899 | } | |
3900 | } | |
3901 | ||
bd5bd7ac KH |
3902 | /* Worker function for TARGET_RETURN_IN_MEMORY. */ |
3903 | ||
4c45af42 | 3904 | static bool |
586de218 | 3905 | xtensa_return_in_memory (const_tree type, const_tree fntype ATTRIBUTE_UNUSED) |
4c45af42 KH |
3906 | { |
3907 | return ((unsigned HOST_WIDE_INT) int_size_in_bytes (type) | |
3908 | > 4 * UNITS_PER_WORD); | |
3909 | } | |
3910 | ||
e2b2d01e AS |
3911 | /* Worker function for TARGET_FUNCTION_VALUE. */ |
3912 | ||
3913 | rtx | |
3914 | xtensa_function_value (const_tree valtype, const_tree func ATTRIBUTE_UNUSED, | |
3915 | bool outgoing) | |
3916 | { | |
3917 | return gen_rtx_REG ((INTEGRAL_TYPE_P (valtype) | |
3918 | && TYPE_PRECISION (valtype) < BITS_PER_WORD) | |
3919 | ? SImode : TYPE_MODE (valtype), | |
3920 | outgoing ? GP_OUTGOING_RETURN : GP_RETURN); | |
3921 | } | |
7f0ee694 | 3922 | |
dde8a3a4 AS |
3923 | /* Worker function for TARGET_LIBCALL_VALUE. */ |
3924 | ||
3925 | static rtx | |
ef4bddc2 | 3926 | xtensa_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED) |
dde8a3a4 AS |
3927 | { |
3928 | return gen_rtx_REG ((GET_MODE_CLASS (mode) == MODE_INT | |
3929 | && GET_MODE_SIZE (mode) < UNITS_PER_WORD) | |
3930 | ? SImode : mode, GP_RETURN); | |
3931 | } | |
3932 | ||
3933 | /* Worker function TARGET_FUNCTION_VALUE_REGNO_P. */ | |
3934 | ||
3935 | static bool | |
3936 | xtensa_function_value_regno_p (const unsigned int regno) | |
3937 | { | |
3938 | return (regno == GP_RETURN); | |
3939 | } | |
3940 | ||
2b4fa409 RH |
3941 | /* The static chain is passed in memory. Provide rtx giving 'mem' |
3942 | expressions that denote where they are stored. */ | |
3943 | ||
3944 | static rtx | |
c21df29b | 3945 | xtensa_static_chain (const_tree ARG_UNUSED (fndecl_or_type), bool incoming_p) |
2b4fa409 | 3946 | { |
590e2636 MF |
3947 | if (TARGET_WINDOWED_ABI) |
3948 | { | |
3949 | rtx base = incoming_p ? arg_pointer_rtx : stack_pointer_rtx; | |
3950 | return gen_frame_mem (Pmode, plus_constant (Pmode, base, | |
3951 | -5 * UNITS_PER_WORD)); | |
3952 | } | |
3953 | else | |
3954 | return gen_rtx_REG (Pmode, A8_REG); | |
2b4fa409 RH |
3955 | } |
3956 | ||
3957 | ||
7f0ee694 BW |
3958 | /* TRAMPOLINE_TEMPLATE: For Xtensa, the trampoline must perform an ENTRY |
3959 | instruction with a minimal stack frame in order to get some free | |
3960 | registers. Once the actual call target is known, the proper stack frame | |
3961 | size is extracted from the ENTRY instruction at the target and the | |
3962 | current frame is adjusted to match. The trampoline then transfers | |
3963 | control to the instruction following the ENTRY at the target. Note: | |
3964 | this assumes that the target begins with an ENTRY instruction. */ | |
3965 | ||
3c1229cb RH |
3966 | static void |
3967 | xtensa_asm_trampoline_template (FILE *stream) | |
7f0ee694 BW |
3968 | { |
3969 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); | |
3970 | ||
3971 | fprintf (stream, "\t.begin no-transform\n"); | |
7f0ee694 | 3972 | |
590e2636 | 3973 | if (TARGET_WINDOWED_ABI) |
7f0ee694 | 3974 | { |
590e2636 | 3975 | fprintf (stream, "\tentry\tsp, %d\n", MIN_FRAME_SIZE); |
7f0ee694 | 3976 | |
590e2636 MF |
3977 | if (use_call0) |
3978 | { | |
3979 | /* Save the return address. */ | |
3980 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 3981 | |
590e2636 MF |
3982 | /* Use a CALL0 instruction to skip past the constants and in the |
3983 | process get the PC into A0. This allows PC-relative access to | |
3984 | the constants without relying on L32R. */ | |
3985 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
3986 | } | |
3987 | else | |
3988 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 3989 | |
590e2636 MF |
3990 | fprintf (stream, "\t.align\t4\n"); |
3991 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
3992 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
3993 | fprintf (stream, ".Lskipconsts:\n"); | |
3994 | ||
3995 | /* Load the static chain and function address from the trampoline. */ | |
3996 | if (use_call0) | |
3997 | { | |
3998 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
3999 | fprintf (stream, "\tl32i\ta9, a0, 0\n"); | |
4000 | fprintf (stream, "\tl32i\ta8, a0, 4\n"); | |
4001 | } | |
4002 | else | |
4003 | { | |
4004 | fprintf (stream, "\tl32r\ta9, .Lchainval\n"); | |
4005 | fprintf (stream, "\tl32r\ta8, .Lfnaddr\n"); | |
4006 | } | |
4007 | ||
4008 | /* Store the static chain. */ | |
4009 | fprintf (stream, "\ts32i\ta9, sp, %d\n", MIN_FRAME_SIZE - 20); | |
4010 | ||
4011 | /* Set the proper stack pointer value. */ | |
4012 | fprintf (stream, "\tl32i\ta9, a8, 0\n"); | |
4013 | fprintf (stream, "\textui\ta9, a9, %d, 12\n", | |
4014 | TARGET_BIG_ENDIAN ? 8 : 12); | |
4015 | fprintf (stream, "\tslli\ta9, a9, 3\n"); | |
4016 | fprintf (stream, "\taddi\ta9, a9, %d\n", -MIN_FRAME_SIZE); | |
4017 | fprintf (stream, "\tsub\ta9, sp, a9\n"); | |
4018 | fprintf (stream, "\tmovsp\tsp, a9\n"); | |
4019 | ||
4020 | if (use_call0) | |
4021 | /* Restore the return address. */ | |
4022 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4023 | ||
4024 | /* Jump to the instruction following the ENTRY. */ | |
4025 | fprintf (stream, "\taddi\ta8, a8, 3\n"); | |
4026 | fprintf (stream, "\tjx\ta8\n"); | |
4027 | ||
4028 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ | |
4029 | if (use_call0) | |
4030 | fprintf (stream, "\t.byte\t0\n"); | |
4031 | else | |
4032 | fprintf (stream, "\tnop\n"); | |
7f0ee694 BW |
4033 | } |
4034 | else | |
4035 | { | |
590e2636 MF |
4036 | if (use_call0) |
4037 | { | |
4038 | /* Save the return address. */ | |
4039 | fprintf (stream, "\tmov\ta10, a0\n"); | |
7f0ee694 | 4040 | |
590e2636 MF |
4041 | /* Use a CALL0 instruction to skip past the constants and in the |
4042 | process get the PC into A0. This allows PC-relative access to | |
4043 | the constants without relying on L32R. */ | |
4044 | fprintf (stream, "\tcall0\t.Lskipconsts\n"); | |
4045 | } | |
4046 | else | |
4047 | fprintf (stream, "\tj\t.Lskipconsts\n"); | |
7f0ee694 | 4048 | |
590e2636 MF |
4049 | fprintf (stream, "\t.align\t4\n"); |
4050 | fprintf (stream, ".Lchainval:%s0\n", integer_asm_op (4, TRUE)); | |
4051 | fprintf (stream, ".Lfnaddr:%s0\n", integer_asm_op (4, TRUE)); | |
4052 | fprintf (stream, ".Lskipconsts:\n"); | |
7f0ee694 | 4053 | |
590e2636 MF |
4054 | /* Load the static chain and function address from the trampoline. */ |
4055 | if (use_call0) | |
4056 | { | |
4057 | fprintf (stream, "\taddi\ta0, a0, 3\n"); | |
4058 | fprintf (stream, "\tl32i\ta8, a0, 0\n"); | |
4059 | fprintf (stream, "\tl32i\ta9, a0, 4\n"); | |
4060 | fprintf (stream, "\tmov\ta0, a10\n"); | |
4061 | } | |
4062 | else | |
4063 | { | |
4064 | fprintf (stream, "\tl32r\ta8, .Lchainval\n"); | |
4065 | fprintf (stream, "\tl32r\ta9, .Lfnaddr\n"); | |
4066 | } | |
4067 | fprintf (stream, "\tjx\ta9\n"); | |
7f0ee694 | 4068 | |
590e2636 MF |
4069 | /* Pad size to a multiple of TRAMPOLINE_ALIGNMENT. */ |
4070 | if (use_call0) | |
4071 | fprintf (stream, "\t.byte\t0\n"); | |
4072 | else | |
4073 | fprintf (stream, "\tnop\n"); | |
4074 | } | |
7f0ee694 BW |
4075 | fprintf (stream, "\t.end no-transform\n"); |
4076 | } | |
4077 | ||
3c1229cb RH |
4078 | static void |
4079 | xtensa_trampoline_init (rtx m_tramp, tree fndecl, rtx chain) | |
7f0ee694 | 4080 | { |
3c1229cb | 4081 | rtx func = XEXP (DECL_RTL (fndecl), 0); |
7f0ee694 | 4082 | bool use_call0 = (TARGET_CONST16 || TARGET_ABSOLUTE_LITERALS); |
590e2636 MF |
4083 | int chain_off; |
4084 | int func_off; | |
4085 | ||
4086 | if (TARGET_WINDOWED_ABI) | |
4087 | { | |
4088 | chain_off = use_call0 ? 12 : 8; | |
4089 | func_off = use_call0 ? 16 : 12; | |
4090 | } | |
4091 | else | |
4092 | { | |
4093 | chain_off = use_call0 ? 8 : 4; | |
4094 | func_off = use_call0 ? 12 : 8; | |
4095 | } | |
3c1229cb RH |
4096 | |
4097 | emit_block_move (m_tramp, assemble_trampoline_template (), | |
4098 | GEN_INT (TRAMPOLINE_SIZE), BLOCK_OP_NORMAL); | |
4099 | ||
4100 | emit_move_insn (adjust_address (m_tramp, SImode, chain_off), chain); | |
4101 | emit_move_insn (adjust_address (m_tramp, SImode, func_off), func); | |
7f0ee694 | 4102 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__xtensa_sync_caches"), |
db69559b | 4103 | LCT_NORMAL, VOIDmode, XEXP (m_tramp, 0), Pmode); |
7f0ee694 BW |
4104 | } |
4105 | ||
1a627b35 RS |
4106 | /* Implement TARGET_LEGITIMATE_CONSTANT_P. */ |
4107 | ||
4108 | static bool | |
ef4bddc2 | 4109 | xtensa_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, rtx x) |
1a627b35 RS |
4110 | { |
4111 | return !xtensa_tls_referenced_p (x); | |
4112 | } | |
7f0ee694 | 4113 | |
6383386a FY |
4114 | /* Implement TARGET_CAN_USE_DOLOOP_P. */ |
4115 | ||
4116 | static bool | |
4117 | xtensa_can_use_doloop_p (const widest_int &, const widest_int &, | |
4118 | unsigned int loop_depth, bool entered_at_top) | |
4119 | { | |
4120 | /* Considering limitations in the hardware, only use doloop | |
4121 | for innermost loops which must be entered from the top. */ | |
4122 | if (loop_depth > 1 || !entered_at_top) | |
4123 | return false; | |
4124 | ||
4125 | return true; | |
4126 | } | |
4127 | ||
4128 | /* NULL if INSN insn is valid within a low-overhead loop. | |
4129 | Otherwise return why doloop cannot be applied. */ | |
4130 | ||
4131 | static const char * | |
4132 | xtensa_invalid_within_doloop (const rtx_insn *insn) | |
4133 | { | |
4134 | if (CALL_P (insn)) | |
4135 | return "Function call in the loop."; | |
4136 | ||
4137 | if (JUMP_P (insn) && INSN_CODE (insn) == CODE_FOR_return) | |
4138 | return "Return from a call instruction in the loop."; | |
4139 | ||
4140 | return NULL; | |
4141 | } | |
4142 | ||
4143 | /* Optimize LOOP. */ | |
4144 | ||
4145 | static bool | |
4146 | hwloop_optimize (hwloop_info loop) | |
4147 | { | |
4148 | int i; | |
4149 | edge entry_edge; | |
4150 | basic_block entry_bb; | |
4151 | rtx iter_reg; | |
4152 | rtx_insn *insn, *seq, *entry_after; | |
4153 | ||
4154 | if (loop->depth > 1) | |
4155 | { | |
4156 | if (dump_file) | |
4157 | fprintf (dump_file, ";; loop %d is not innermost\n", | |
4158 | loop->loop_no); | |
4159 | return false; | |
4160 | } | |
4161 | ||
4162 | if (!loop->incoming_dest) | |
4163 | { | |
4164 | if (dump_file) | |
4165 | fprintf (dump_file, ";; loop %d has more than one entry\n", | |
4166 | loop->loop_no); | |
4167 | return false; | |
4168 | } | |
4169 | ||
4170 | if (loop->incoming_dest != loop->head) | |
4171 | { | |
4172 | if (dump_file) | |
4173 | fprintf (dump_file, ";; loop %d is not entered from head\n", | |
4174 | loop->loop_no); | |
4175 | return false; | |
4176 | } | |
4177 | ||
4178 | if (loop->has_call || loop->has_asm) | |
4179 | { | |
4180 | if (dump_file) | |
4181 | fprintf (dump_file, ";; loop %d has invalid insn\n", | |
4182 | loop->loop_no); | |
4183 | return false; | |
4184 | } | |
4185 | ||
4186 | /* Scan all the blocks to make sure they don't use iter_reg. */ | |
4187 | if (loop->iter_reg_used || loop->iter_reg_used_outside) | |
4188 | { | |
4189 | if (dump_file) | |
4190 | fprintf (dump_file, ";; loop %d uses iterator\n", | |
4191 | loop->loop_no); | |
4192 | return false; | |
4193 | } | |
4194 | ||
4195 | /* Check if start_label appears before doloop_end. */ | |
4196 | insn = loop->start_label; | |
4197 | while (insn && insn != loop->loop_end) | |
4198 | insn = NEXT_INSN (insn); | |
4199 | ||
4200 | if (!insn) | |
4201 | { | |
4202 | if (dump_file) | |
4203 | fprintf (dump_file, ";; loop %d start_label not before loop_end\n", | |
4204 | loop->loop_no); | |
4205 | return false; | |
4206 | } | |
4207 | ||
4208 | /* Get the loop iteration register. */ | |
4209 | iter_reg = loop->iter_reg; | |
4210 | ||
4211 | gcc_assert (REG_P (iter_reg)); | |
4212 | ||
4213 | entry_edge = NULL; | |
4214 | ||
4215 | FOR_EACH_VEC_SAFE_ELT (loop->incoming, i, entry_edge) | |
4216 | if (entry_edge->flags & EDGE_FALLTHRU) | |
4217 | break; | |
4218 | ||
4219 | if (entry_edge == NULL) | |
4220 | return false; | |
4221 | ||
4222 | /* Place the zero_cost_loop_start instruction before the loop. */ | |
4223 | entry_bb = entry_edge->src; | |
4224 | ||
4225 | start_sequence (); | |
4226 | ||
4227 | insn = emit_insn (gen_zero_cost_loop_start (loop->iter_reg, | |
4228 | loop->start_label, | |
4229 | loop->iter_reg)); | |
4230 | ||
4231 | seq = get_insns (); | |
4232 | ||
d7326aaf MF |
4233 | entry_after = BB_END (entry_bb); |
4234 | if (!single_succ_p (entry_bb) || vec_safe_length (loop->incoming) > 1 | |
4235 | || !entry_after) | |
6383386a FY |
4236 | { |
4237 | basic_block new_bb; | |
4238 | edge e; | |
4239 | edge_iterator ei; | |
4240 | ||
4241 | emit_insn_before (seq, BB_HEAD (loop->head)); | |
4242 | seq = emit_label_before (gen_label_rtx (), seq); | |
4243 | new_bb = create_basic_block (seq, insn, entry_bb); | |
4244 | FOR_EACH_EDGE (e, ei, loop->incoming) | |
4245 | { | |
4246 | if (!(e->flags & EDGE_FALLTHRU)) | |
4247 | redirect_edge_and_branch_force (e, new_bb); | |
4248 | else | |
4249 | redirect_edge_succ (e, new_bb); | |
4250 | } | |
4251 | ||
4252 | make_edge (new_bb, loop->head, 0); | |
4253 | } | |
4254 | else | |
4255 | { | |
6383386a FY |
4256 | while (DEBUG_INSN_P (entry_after) |
4257 | || (NOTE_P (entry_after) | |
00b94487 | 4258 | && NOTE_KIND (entry_after) != NOTE_INSN_BASIC_BLOCK)) |
6383386a FY |
4259 | entry_after = PREV_INSN (entry_after); |
4260 | ||
4261 | emit_insn_after (seq, entry_after); | |
4262 | } | |
4263 | ||
4264 | end_sequence (); | |
4265 | ||
4266 | return true; | |
4267 | } | |
4268 | ||
4269 | /* A callback for the hw-doloop pass. Called when a loop we have discovered | |
4270 | turns out not to be optimizable; we have to split the loop_end pattern into | |
4271 | a subtract and a test. */ | |
4272 | ||
4273 | static void | |
4274 | hwloop_fail (hwloop_info loop) | |
4275 | { | |
4276 | rtx test; | |
4277 | rtx_insn *insn = loop->loop_end; | |
4278 | ||
4279 | emit_insn_before (gen_addsi3 (loop->iter_reg, | |
4280 | loop->iter_reg, | |
4281 | constm1_rtx), | |
4282 | loop->loop_end); | |
4283 | ||
4284 | test = gen_rtx_NE (VOIDmode, loop->iter_reg, const0_rtx); | |
4285 | insn = emit_jump_insn_before (gen_cbranchsi4 (test, | |
4286 | loop->iter_reg, const0_rtx, | |
4287 | loop->start_label), | |
4288 | loop->loop_end); | |
4289 | ||
4290 | JUMP_LABEL (insn) = loop->start_label; | |
4291 | LABEL_NUSES (loop->start_label)++; | |
4292 | delete_insn (loop->loop_end); | |
4293 | } | |
4294 | ||
4295 | /* A callback for the hw-doloop pass. This function examines INSN; if | |
4296 | it is a doloop_end pattern we recognize, return the reg rtx for the | |
4297 | loop counter. Otherwise, return NULL_RTX. */ | |
4298 | ||
4299 | static rtx | |
4300 | hwloop_pattern_reg (rtx_insn *insn) | |
4301 | { | |
4302 | rtx reg; | |
4303 | ||
4304 | if (!JUMP_P (insn) || recog_memoized (insn) != CODE_FOR_loop_end) | |
4305 | return NULL_RTX; | |
4306 | ||
4307 | reg = SET_DEST (XVECEXP (PATTERN (insn), 0, 1)); | |
4308 | if (!REG_P (reg)) | |
4309 | return NULL_RTX; | |
4310 | ||
4311 | return reg; | |
4312 | } | |
4313 | ||
4314 | ||
4315 | static struct hw_doloop_hooks xtensa_doloop_hooks = | |
4316 | { | |
4317 | hwloop_pattern_reg, | |
4318 | hwloop_optimize, | |
4319 | hwloop_fail | |
4320 | }; | |
4321 | ||
4322 | /* Run from machine_dependent_reorg, this pass looks for doloop_end insns | |
4323 | and tries to rewrite the RTL of these loops so that proper Xtensa | |
4324 | hardware loops are generated. */ | |
4325 | ||
4326 | static void | |
4327 | xtensa_reorg_loops (void) | |
4328 | { | |
1a711a0b MF |
4329 | if (TARGET_LOOPS) |
4330 | reorg_loops (false, &xtensa_doloop_hooks); | |
c6836000 | 4331 | } |
6383386a FY |
4332 | |
4333 | /* Implement the TARGET_MACHINE_DEPENDENT_REORG pass. */ | |
4334 | ||
4335 | static void | |
4336 | xtensa_reorg (void) | |
4337 | { | |
4338 | /* We are freeing block_for_insn in the toplev to keep compatibility | |
4339 | with old MDEP_REORGS that are not CFG based. Recompute it now. */ | |
4340 | compute_bb_for_insn (); | |
4341 | ||
4342 | df_analyze (); | |
4343 | ||
4344 | /* Doloop optimization. */ | |
4345 | xtensa_reorg_loops (); | |
4346 | } | |
4347 | ||
590e2636 MF |
4348 | /* Update register usage after having seen the compiler flags. */ |
4349 | ||
4350 | static void | |
4351 | xtensa_conditional_register_usage (void) | |
4352 | { | |
4353 | unsigned i, c_mask; | |
4354 | ||
4355 | c_mask = TARGET_WINDOWED_ABI ? (1 << 1) : (1 << 2); | |
4356 | ||
4357 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
4358 | { | |
4359 | /* Set/reset conditionally defined registers from | |
4360 | CALL_USED_REGISTERS initializer. */ | |
4361 | if (call_used_regs[i] > 1) | |
4362 | call_used_regs[i] = !!(call_used_regs[i] & c_mask); | |
4363 | } | |
4364 | ||
4365 | /* Remove hard FP register from the preferred reload registers set. */ | |
4366 | CLEAR_HARD_REG_BIT (reg_class_contents[(int)RL_REGS], | |
4367 | HARD_FRAME_POINTER_REGNUM); | |
4368 | } | |
4369 | ||
4370 | /* Map hard register number to register class */ | |
4371 | ||
4372 | enum reg_class xtensa_regno_to_class (int regno) | |
4373 | { | |
4374 | static const enum reg_class regno_to_class[FIRST_PSEUDO_REGISTER] = | |
4375 | { | |
4376 | RL_REGS, SP_REG, RL_REGS, RL_REGS, | |
4377 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4378 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4379 | RL_REGS, RL_REGS, RL_REGS, RL_REGS, | |
4380 | AR_REGS, AR_REGS, BR_REGS, | |
4381 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4382 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4383 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4384 | FP_REGS, FP_REGS, FP_REGS, FP_REGS, | |
4385 | ACC_REG, | |
4386 | }; | |
4387 | ||
4388 | if (regno == HARD_FRAME_POINTER_REGNUM) | |
4389 | return GR_REGS; | |
4390 | else | |
4391 | return regno_to_class[regno]; | |
4392 | } | |
4393 | ||
58e17cf8 RS |
4394 | /* Implement TARGET_CONSTANT_ALIGNMENT. Align string constants and |
4395 | constructors to at least a word boundary. The typical use of this | |
4396 | macro is to increase alignment for string constants to be word | |
4397 | aligned so that 'strcpy' calls that copy constants can be done | |
4398 | inline. */ | |
4399 | ||
4400 | static HOST_WIDE_INT | |
4401 | xtensa_constant_alignment (const_tree exp, HOST_WIDE_INT align) | |
4402 | { | |
4403 | if ((TREE_CODE (exp) == STRING_CST || TREE_CODE (exp) == CONSTRUCTOR) | |
4404 | && !optimize_size) | |
4405 | return MAX (align, BITS_PER_WORD); | |
4406 | return align; | |
4407 | } | |
4408 | ||
2a31c321 RS |
4409 | /* Implement TARGET_STARTING_FRAME_OFFSET. */ |
4410 | ||
4411 | static HOST_WIDE_INT | |
4412 | xtensa_starting_frame_offset (void) | |
4413 | { | |
4414 | if (FRAME_GROWS_DOWNWARD) | |
4415 | return 0; | |
4416 | return crtl->outgoing_args_size; | |
4417 | } | |
4418 | ||
8c9ee176 MF |
4419 | /* Implement TARGET_ASAN_SHADOW_OFFSET. */ |
4420 | ||
4421 | static unsigned HOST_WIDE_INT | |
4422 | xtensa_asan_shadow_offset (void) | |
4423 | { | |
4424 | return HOST_WIDE_INT_UC (0x10000000); | |
4425 | } | |
4426 | ||
e2500fed | 4427 | #include "gt-xtensa.h" |