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188fc5b5 | 1 | /* Definitions of target machine for GCC for IA-32. |
cf011243 | 2 | Copyright (C) 1988, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
d2af65b9 | 3 | 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
2f83c7d6 | 4 | Free Software Foundation, Inc. |
c98f8742 | 5 | |
188fc5b5 | 6 | This file is part of GCC. |
c98f8742 | 7 | |
188fc5b5 | 8 | GCC is free software; you can redistribute it and/or modify |
c98f8742 | 9 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
c98f8742 JVA |
11 | any later version. |
12 | ||
188fc5b5 | 13 | GCC is distributed in the hope that it will be useful, |
c98f8742 JVA |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
748086b7 JJ |
18 | Under Section 7 of GPL version 3, you are granted additional |
19 | permissions described in the GCC Runtime Library Exception, version | |
20 | 3.1, as published by the Free Software Foundation. | |
21 | ||
22 | You should have received a copy of the GNU General Public License and | |
23 | a copy of the GCC Runtime Library Exception along with this program; | |
24 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
2f83c7d6 | 25 | <http://www.gnu.org/licenses/>. */ |
c98f8742 | 26 | |
ccf8e764 RH |
27 | /* The purpose of this file is to define the characteristics of the i386, |
28 | independent of assembler syntax or operating system. | |
29 | ||
30 | Three other files build on this one to describe a specific assembler syntax: | |
31 | bsd386.h, att386.h, and sun386.h. | |
32 | ||
33 | The actual tm.h file for a particular system should include | |
34 | this file, and then the file for the appropriate assembler syntax. | |
35 | ||
36 | Many macros that specify assembler syntax are omitted entirely from | |
37 | this file because they really belong in the files for particular | |
38 | assemblers. These include RP, IP, LPREFIX, PUT_OP_SIZE, USE_STAR, | |
39 | ADDR_BEG, ADDR_END, PRINT_IREG, PRINT_SCALE, PRINT_B_I_S, and many | |
40 | that start with ASM_ or end in ASM_OP. */ | |
41 | ||
0a1c5e55 UB |
42 | /* Redefines for option macros. */ |
43 | ||
44 | #define TARGET_64BIT OPTION_ISA_64BIT | |
45 | #define TARGET_MMX OPTION_ISA_MMX | |
46 | #define TARGET_3DNOW OPTION_ISA_3DNOW | |
47 | #define TARGET_3DNOW_A OPTION_ISA_3DNOW_A | |
48 | #define TARGET_SSE OPTION_ISA_SSE | |
49 | #define TARGET_SSE2 OPTION_ISA_SSE2 | |
50 | #define TARGET_SSE3 OPTION_ISA_SSE3 | |
51 | #define TARGET_SSSE3 OPTION_ISA_SSSE3 | |
52 | #define TARGET_SSE4_1 OPTION_ISA_SSE4_1 | |
3b8dd071 | 53 | #define TARGET_SSE4_2 OPTION_ISA_SSE4_2 |
95879c72 L |
54 | #define TARGET_AVX OPTION_ISA_AVX |
55 | #define TARGET_FMA OPTION_ISA_FMA | |
0a1c5e55 | 56 | #define TARGET_SSE4A OPTION_ISA_SSE4A |
cbf2e4d4 | 57 | #define TARGET_FMA4 OPTION_ISA_FMA4 |
43a8b705 | 58 | #define TARGET_XOP OPTION_ISA_XOP |
3e901069 | 59 | #define TARGET_LWP OPTION_ISA_LWP |
04e1d06b | 60 | #define TARGET_ROUND OPTION_ISA_ROUND |
ab442df7 MM |
61 | #define TARGET_ABM OPTION_ISA_ABM |
62 | #define TARGET_POPCNT OPTION_ISA_POPCNT | |
63 | #define TARGET_SAHF OPTION_ISA_SAHF | |
cabf85c3 | 64 | #define TARGET_MOVBE OPTION_ISA_MOVBE |
8ed0ce99 | 65 | #define TARGET_CRC32 OPTION_ISA_CRC32 |
ab442df7 MM |
66 | #define TARGET_AES OPTION_ISA_AES |
67 | #define TARGET_PCLMUL OPTION_ISA_PCLMUL | |
68 | #define TARGET_CMPXCHG16B OPTION_ISA_CX16 | |
4ee89d5f L |
69 | #define TARGET_FSGSBASE OPTION_ISA_FSGSBASE |
70 | #define TARGET_RDRND OPTION_ISA_RDRND | |
71 | #define TARGET_F16C OPTION_ISA_F16C | |
ab442df7 | 72 | |
04e1d06b | 73 | |
cbf2e4d4 HJ |
74 | /* SSE4.1 defines round instructions */ |
75 | #define OPTION_MASK_ISA_ROUND OPTION_MASK_ISA_SSE4_1 | |
04e1d06b | 76 | #define OPTION_ISA_ROUND ((ix86_isa_flags & OPTION_MASK_ISA_ROUND) != 0) |
0a1c5e55 | 77 | |
26b5109f RS |
78 | #include "config/vxworks-dummy.h" |
79 | ||
8c996513 JH |
80 | /* Algorithm to expand string function with. */ |
81 | enum stringop_alg | |
82 | { | |
83 | no_stringop, | |
84 | libcall, | |
85 | rep_prefix_1_byte, | |
86 | rep_prefix_4_byte, | |
87 | rep_prefix_8_byte, | |
88 | loop_1_byte, | |
89 | loop, | |
90 | unrolled_loop | |
91 | }; | |
ccf8e764 | 92 | |
c69fa2d4 | 93 | #define MAX_STRINGOP_ALGS 4 |
ccf8e764 | 94 | |
8c996513 JH |
95 | /* Specify what algorithm to use for stringops on known size. |
96 | When size is unknown, the UNKNOWN_SIZE alg is used. When size is | |
97 | known at compile time or estimated via feedback, the SIZE array | |
98 | is walked in order until MAX is greater then the estimate (or -1 | |
4f3f76e6 | 99 | means infinity). Corresponding ALG is used then. |
8c996513 | 100 | For example initializer: |
4f3f76e6 | 101 | {{256, loop}, {-1, rep_prefix_4_byte}} |
8c996513 | 102 | will use loop for blocks smaller or equal to 256 bytes, rep prefix will |
ccf8e764 | 103 | be used otherwise. */ |
8c996513 JH |
104 | struct stringop_algs |
105 | { | |
106 | const enum stringop_alg unknown_size; | |
107 | const struct stringop_strategy { | |
108 | const int max; | |
109 | const enum stringop_alg alg; | |
c69fa2d4 | 110 | } size [MAX_STRINGOP_ALGS]; |
8c996513 JH |
111 | }; |
112 | ||
d4ba09c0 SC |
113 | /* Define the specific costs for a given cpu */ |
114 | ||
115 | struct processor_costs { | |
8b60264b KG |
116 | const int add; /* cost of an add instruction */ |
117 | const int lea; /* cost of a lea instruction */ | |
118 | const int shift_var; /* variable shift costs */ | |
119 | const int shift_const; /* constant shift costs */ | |
f676971a | 120 | const int mult_init[5]; /* cost of starting a multiply |
4977bab6 | 121 | in QImode, HImode, SImode, DImode, TImode*/ |
8b60264b | 122 | const int mult_bit; /* cost of multiply per each bit set */ |
f676971a | 123 | const int divide[5]; /* cost of a divide/mod |
4977bab6 | 124 | in QImode, HImode, SImode, DImode, TImode*/ |
44cf5b6a JH |
125 | int movsx; /* The cost of movsx operation. */ |
126 | int movzx; /* The cost of movzx operation. */ | |
8b60264b KG |
127 | const int large_insn; /* insns larger than this cost more */ |
128 | const int move_ratio; /* The threshold of number of scalar | |
ac775968 | 129 | memory-to-memory move insns. */ |
8b60264b KG |
130 | const int movzbl_load; /* cost of loading using movzbl */ |
131 | const int int_load[3]; /* cost of loading integer registers | |
96e7ae40 JH |
132 | in QImode, HImode and SImode relative |
133 | to reg-reg move (2). */ | |
8b60264b | 134 | const int int_store[3]; /* cost of storing integer register |
96e7ae40 | 135 | in QImode, HImode and SImode */ |
8b60264b KG |
136 | const int fp_move; /* cost of reg,reg fld/fst */ |
137 | const int fp_load[3]; /* cost of loading FP register | |
96e7ae40 | 138 | in SFmode, DFmode and XFmode */ |
8b60264b | 139 | const int fp_store[3]; /* cost of storing FP register |
96e7ae40 | 140 | in SFmode, DFmode and XFmode */ |
8b60264b KG |
141 | const int mmx_move; /* cost of moving MMX register. */ |
142 | const int mmx_load[2]; /* cost of loading MMX register | |
fa79946e | 143 | in SImode and DImode */ |
8b60264b | 144 | const int mmx_store[2]; /* cost of storing MMX register |
fa79946e | 145 | in SImode and DImode */ |
8b60264b KG |
146 | const int sse_move; /* cost of moving SSE register. */ |
147 | const int sse_load[3]; /* cost of loading SSE register | |
fa79946e | 148 | in SImode, DImode and TImode*/ |
8b60264b | 149 | const int sse_store[3]; /* cost of storing SSE register |
fa79946e | 150 | in SImode, DImode and TImode*/ |
8b60264b | 151 | const int mmxsse_to_integer; /* cost of moving mmxsse register to |
fa79946e | 152 | integer and vice versa. */ |
46cb0441 ZD |
153 | const int l1_cache_size; /* size of l1 cache, in kilobytes. */ |
154 | const int l2_cache_size; /* size of l2 cache, in kilobytes. */ | |
f4365627 JH |
155 | const int prefetch_block; /* bytes moved to cache for prefetch. */ |
156 | const int simultaneous_prefetches; /* number of parallel prefetch | |
157 | operations. */ | |
4977bab6 | 158 | const int branch_cost; /* Default value for BRANCH_COST. */ |
229b303a RS |
159 | const int fadd; /* cost of FADD and FSUB instructions. */ |
160 | const int fmul; /* cost of FMUL instruction. */ | |
161 | const int fdiv; /* cost of FDIV instruction. */ | |
162 | const int fabs; /* cost of FABS instruction. */ | |
163 | const int fchs; /* cost of FCHS instruction. */ | |
164 | const int fsqrt; /* cost of FSQRT instruction. */ | |
8c996513 JH |
165 | /* Specify what algorithm |
166 | to use for stringops on unknown size. */ | |
167 | struct stringop_algs memcpy[2], memset[2]; | |
e70444a8 HJ |
168 | const int scalar_stmt_cost; /* Cost of any scalar operation, excluding |
169 | load and store. */ | |
170 | const int scalar_load_cost; /* Cost of scalar load. */ | |
171 | const int scalar_store_cost; /* Cost of scalar store. */ | |
172 | const int vec_stmt_cost; /* Cost of any vector operation, excluding | |
173 | load, store, vector-to-scalar and | |
174 | scalar-to-vector operation. */ | |
175 | const int vec_to_scalar_cost; /* Cost of vect-to-scalar operation. */ | |
176 | const int scalar_to_vec_cost; /* Cost of scalar-to-vector operation. */ | |
4f3f76e6 | 177 | const int vec_align_load_cost; /* Cost of aligned vector load. */ |
e70444a8 HJ |
178 | const int vec_unalign_load_cost; /* Cost of unaligned vector load. */ |
179 | const int vec_store_cost; /* Cost of vector store. */ | |
180 | const int cond_taken_branch_cost; /* Cost of taken branch for vectorizer | |
181 | cost model. */ | |
182 | const int cond_not_taken_branch_cost;/* Cost of not taken branch for | |
183 | vectorizer cost model. */ | |
d4ba09c0 SC |
184 | }; |
185 | ||
8b60264b | 186 | extern const struct processor_costs *ix86_cost; |
b2077fd2 JH |
187 | extern const struct processor_costs ix86_size_cost; |
188 | ||
189 | #define ix86_cur_cost() \ | |
190 | (optimize_insn_for_size_p () ? &ix86_size_cost: ix86_cost) | |
d4ba09c0 | 191 | |
c98f8742 JVA |
192 | /* Macros used in the machine description to test the flags. */ |
193 | ||
ddd5a7c1 | 194 | /* configure can arrange to make this 2, to force a 486. */ |
e075ae69 | 195 | |
35b528be | 196 | #ifndef TARGET_CPU_DEFAULT |
d326eaf0 | 197 | #define TARGET_CPU_DEFAULT TARGET_CPU_DEFAULT_generic |
10e9fecc | 198 | #endif |
35b528be | 199 | |
004d3859 GK |
200 | #ifndef TARGET_FPMATH_DEFAULT |
201 | #define TARGET_FPMATH_DEFAULT \ | |
202 | (TARGET_64BIT && TARGET_SSE ? FPMATH_SSE : FPMATH_387) | |
203 | #endif | |
204 | ||
6ac49599 | 205 | #define TARGET_FLOAT_RETURNS_IN_80387 TARGET_FLOAT_RETURNS |
b08de47e | 206 | |
5791cc29 JT |
207 | /* 64bit Sledgehammer mode. For libgcc2 we make sure this is a |
208 | compile-time constant. */ | |
209 | #ifdef IN_LIBGCC2 | |
6ac49599 | 210 | #undef TARGET_64BIT |
5791cc29 JT |
211 | #ifdef __x86_64__ |
212 | #define TARGET_64BIT 1 | |
213 | #else | |
214 | #define TARGET_64BIT 0 | |
215 | #endif | |
216 | #else | |
6ac49599 RS |
217 | #ifndef TARGET_BI_ARCH |
218 | #undef TARGET_64BIT | |
67adf6a9 | 219 | #if TARGET_64BIT_DEFAULT |
0c2dc519 JH |
220 | #define TARGET_64BIT 1 |
221 | #else | |
222 | #define TARGET_64BIT 0 | |
223 | #endif | |
224 | #endif | |
5791cc29 | 225 | #endif |
25f94bb5 | 226 | |
750054a2 CT |
227 | #define HAS_LONG_COND_BRANCH 1 |
228 | #define HAS_LONG_UNCOND_BRANCH 1 | |
229 | ||
9e555526 RH |
230 | #define TARGET_386 (ix86_tune == PROCESSOR_I386) |
231 | #define TARGET_486 (ix86_tune == PROCESSOR_I486) | |
232 | #define TARGET_PENTIUM (ix86_tune == PROCESSOR_PENTIUM) | |
233 | #define TARGET_PENTIUMPRO (ix86_tune == PROCESSOR_PENTIUMPRO) | |
cfe1b18f | 234 | #define TARGET_GEODE (ix86_tune == PROCESSOR_GEODE) |
9e555526 RH |
235 | #define TARGET_K6 (ix86_tune == PROCESSOR_K6) |
236 | #define TARGET_ATHLON (ix86_tune == PROCESSOR_ATHLON) | |
237 | #define TARGET_PENTIUM4 (ix86_tune == PROCESSOR_PENTIUM4) | |
238 | #define TARGET_K8 (ix86_tune == PROCESSOR_K8) | |
4977bab6 | 239 | #define TARGET_ATHLON_K8 (TARGET_K8 || TARGET_ATHLON) |
89c43c0a | 240 | #define TARGET_NOCONA (ix86_tune == PROCESSOR_NOCONA) |
05f85dbb | 241 | #define TARGET_CORE2 (ix86_tune == PROCESSOR_CORE2) |
d326eaf0 JH |
242 | #define TARGET_GENERIC32 (ix86_tune == PROCESSOR_GENERIC32) |
243 | #define TARGET_GENERIC64 (ix86_tune == PROCESSOR_GENERIC64) | |
244 | #define TARGET_GENERIC (TARGET_GENERIC32 || TARGET_GENERIC64) | |
21efb4d4 | 245 | #define TARGET_AMDFAM10 (ix86_tune == PROCESSOR_AMDFAM10) |
1133125e | 246 | #define TARGET_BDVER1 (ix86_tune == PROCESSOR_BDVER1) |
b6837b94 | 247 | #define TARGET_ATOM (ix86_tune == PROCESSOR_ATOM) |
a269a03c | 248 | |
80fd744f RH |
249 | /* Feature tests against the various tunings. */ |
250 | enum ix86_tune_indices { | |
251 | X86_TUNE_USE_LEAVE, | |
252 | X86_TUNE_PUSH_MEMORY, | |
253 | X86_TUNE_ZERO_EXTEND_WITH_AND, | |
80fd744f RH |
254 | X86_TUNE_UNROLL_STRLEN, |
255 | X86_TUNE_DEEP_BRANCH_PREDICTION, | |
256 | X86_TUNE_BRANCH_PREDICTION_HINTS, | |
257 | X86_TUNE_DOUBLE_WITH_ADD, | |
3c2d980c | 258 | X86_TUNE_USE_SAHF, |
80fd744f RH |
259 | X86_TUNE_MOVX, |
260 | X86_TUNE_PARTIAL_REG_STALL, | |
261 | X86_TUNE_PARTIAL_FLAG_REG_STALL, | |
262 | X86_TUNE_USE_HIMODE_FIOP, | |
263 | X86_TUNE_USE_SIMODE_FIOP, | |
264 | X86_TUNE_USE_MOV0, | |
265 | X86_TUNE_USE_CLTD, | |
266 | X86_TUNE_USE_XCHGB, | |
267 | X86_TUNE_SPLIT_LONG_MOVES, | |
268 | X86_TUNE_READ_MODIFY_WRITE, | |
269 | X86_TUNE_READ_MODIFY, | |
270 | X86_TUNE_PROMOTE_QIMODE, | |
271 | X86_TUNE_FAST_PREFIX, | |
272 | X86_TUNE_SINGLE_STRINGOP, | |
273 | X86_TUNE_QIMODE_MATH, | |
274 | X86_TUNE_HIMODE_MATH, | |
275 | X86_TUNE_PROMOTE_QI_REGS, | |
276 | X86_TUNE_PROMOTE_HI_REGS, | |
d8b08ecd UB |
277 | X86_TUNE_SINGLE_POP, |
278 | X86_TUNE_DOUBLE_POP, | |
279 | X86_TUNE_SINGLE_PUSH, | |
280 | X86_TUNE_DOUBLE_PUSH, | |
80fd744f RH |
281 | X86_TUNE_INTEGER_DFMODE_MOVES, |
282 | X86_TUNE_PARTIAL_REG_DEPENDENCY, | |
283 | X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY, | |
1133125e HJ |
284 | X86_TUNE_SSE_UNALIGNED_LOAD_OPTIMAL, |
285 | X86_TUNE_SSE_UNALIGNED_STORE_OPTIMAL, | |
286 | X86_TUNE_SSE_PACKED_SINGLE_INSN_OPTIMAL, | |
80fd744f RH |
287 | X86_TUNE_SSE_SPLIT_REGS, |
288 | X86_TUNE_SSE_TYPELESS_STORES, | |
289 | X86_TUNE_SSE_LOAD0_BY_PXOR, | |
290 | X86_TUNE_MEMORY_MISMATCH_STALL, | |
291 | X86_TUNE_PROLOGUE_USING_MOVE, | |
292 | X86_TUNE_EPILOGUE_USING_MOVE, | |
293 | X86_TUNE_SHIFT1, | |
294 | X86_TUNE_USE_FFREEP, | |
295 | X86_TUNE_INTER_UNIT_MOVES, | |
630ecd8d | 296 | X86_TUNE_INTER_UNIT_CONVERSIONS, |
80fd744f RH |
297 | X86_TUNE_FOUR_JUMP_LIMIT, |
298 | X86_TUNE_SCHEDULE, | |
299 | X86_TUNE_USE_BT, | |
300 | X86_TUNE_USE_INCDEC, | |
301 | X86_TUNE_PAD_RETURNS, | |
e7ed95a2 | 302 | X86_TUNE_PAD_SHORT_FUNCTION, |
80fd744f | 303 | X86_TUNE_EXT_80387_CONSTANTS, |
ddff69b9 MM |
304 | X86_TUNE_SHORTEN_X87_SSE, |
305 | X86_TUNE_AVOID_VECTOR_DECODE, | |
a646aded | 306 | X86_TUNE_PROMOTE_HIMODE_IMUL, |
ddff69b9 MM |
307 | X86_TUNE_SLOW_IMUL_IMM32_MEM, |
308 | X86_TUNE_SLOW_IMUL_IMM8, | |
309 | X86_TUNE_MOVE_M1_VIA_OR, | |
310 | X86_TUNE_NOT_UNPAIRABLE, | |
311 | X86_TUNE_NOT_VECTORMODE, | |
54723b46 | 312 | X86_TUNE_USE_VECTOR_FP_CONVERTS, |
4e9d897d | 313 | X86_TUNE_USE_VECTOR_CONVERTS, |
354f84af | 314 | X86_TUNE_FUSE_CMP_AND_BRANCH, |
b6837b94 | 315 | X86_TUNE_OPT_AGU, |
e72eba85 | 316 | X86_TUNE_VECTORIZE_DOUBLE, |
80fd744f RH |
317 | |
318 | X86_TUNE_LAST | |
319 | }; | |
320 | ||
ab442df7 | 321 | extern unsigned char ix86_tune_features[X86_TUNE_LAST]; |
80fd744f RH |
322 | |
323 | #define TARGET_USE_LEAVE ix86_tune_features[X86_TUNE_USE_LEAVE] | |
324 | #define TARGET_PUSH_MEMORY ix86_tune_features[X86_TUNE_PUSH_MEMORY] | |
325 | #define TARGET_ZERO_EXTEND_WITH_AND \ | |
326 | ix86_tune_features[X86_TUNE_ZERO_EXTEND_WITH_AND] | |
80fd744f RH |
327 | #define TARGET_UNROLL_STRLEN ix86_tune_features[X86_TUNE_UNROLL_STRLEN] |
328 | #define TARGET_DEEP_BRANCH_PREDICTION \ | |
329 | ix86_tune_features[X86_TUNE_DEEP_BRANCH_PREDICTION] | |
330 | #define TARGET_BRANCH_PREDICTION_HINTS \ | |
331 | ix86_tune_features[X86_TUNE_BRANCH_PREDICTION_HINTS] | |
332 | #define TARGET_DOUBLE_WITH_ADD ix86_tune_features[X86_TUNE_DOUBLE_WITH_ADD] | |
333 | #define TARGET_USE_SAHF ix86_tune_features[X86_TUNE_USE_SAHF] | |
334 | #define TARGET_MOVX ix86_tune_features[X86_TUNE_MOVX] | |
335 | #define TARGET_PARTIAL_REG_STALL ix86_tune_features[X86_TUNE_PARTIAL_REG_STALL] | |
336 | #define TARGET_PARTIAL_FLAG_REG_STALL \ | |
337 | ix86_tune_features[X86_TUNE_PARTIAL_FLAG_REG_STALL] | |
338 | #define TARGET_USE_HIMODE_FIOP ix86_tune_features[X86_TUNE_USE_HIMODE_FIOP] | |
339 | #define TARGET_USE_SIMODE_FIOP ix86_tune_features[X86_TUNE_USE_SIMODE_FIOP] | |
340 | #define TARGET_USE_MOV0 ix86_tune_features[X86_TUNE_USE_MOV0] | |
341 | #define TARGET_USE_CLTD ix86_tune_features[X86_TUNE_USE_CLTD] | |
342 | #define TARGET_USE_XCHGB ix86_tune_features[X86_TUNE_USE_XCHGB] | |
343 | #define TARGET_SPLIT_LONG_MOVES ix86_tune_features[X86_TUNE_SPLIT_LONG_MOVES] | |
344 | #define TARGET_READ_MODIFY_WRITE ix86_tune_features[X86_TUNE_READ_MODIFY_WRITE] | |
345 | #define TARGET_READ_MODIFY ix86_tune_features[X86_TUNE_READ_MODIFY] | |
346 | #define TARGET_PROMOTE_QImode ix86_tune_features[X86_TUNE_PROMOTE_QIMODE] | |
347 | #define TARGET_FAST_PREFIX ix86_tune_features[X86_TUNE_FAST_PREFIX] | |
348 | #define TARGET_SINGLE_STRINGOP ix86_tune_features[X86_TUNE_SINGLE_STRINGOP] | |
349 | #define TARGET_QIMODE_MATH ix86_tune_features[X86_TUNE_QIMODE_MATH] | |
350 | #define TARGET_HIMODE_MATH ix86_tune_features[X86_TUNE_HIMODE_MATH] | |
351 | #define TARGET_PROMOTE_QI_REGS ix86_tune_features[X86_TUNE_PROMOTE_QI_REGS] | |
352 | #define TARGET_PROMOTE_HI_REGS ix86_tune_features[X86_TUNE_PROMOTE_HI_REGS] | |
d8b08ecd UB |
353 | #define TARGET_SINGLE_POP ix86_tune_features[X86_TUNE_SINGLE_POP] |
354 | #define TARGET_DOUBLE_POP ix86_tune_features[X86_TUNE_DOUBLE_POP] | |
355 | #define TARGET_SINGLE_PUSH ix86_tune_features[X86_TUNE_SINGLE_PUSH] | |
356 | #define TARGET_DOUBLE_PUSH ix86_tune_features[X86_TUNE_DOUBLE_PUSH] | |
80fd744f RH |
357 | #define TARGET_INTEGER_DFMODE_MOVES \ |
358 | ix86_tune_features[X86_TUNE_INTEGER_DFMODE_MOVES] | |
359 | #define TARGET_PARTIAL_REG_DEPENDENCY \ | |
360 | ix86_tune_features[X86_TUNE_PARTIAL_REG_DEPENDENCY] | |
361 | #define TARGET_SSE_PARTIAL_REG_DEPENDENCY \ | |
362 | ix86_tune_features[X86_TUNE_SSE_PARTIAL_REG_DEPENDENCY] | |
1133125e HJ |
363 | #define TARGET_SSE_UNALIGNED_LOAD_OPTIMAL \ |
364 | ix86_tune_features[X86_TUNE_SSE_UNALIGNED_LOAD_OPTIMAL] | |
365 | #define TARGET_SSE_UNALIGNED_STORE_OPTIMAL \ | |
366 | ix86_tune_features[X86_TUNE_SSE_UNALIGNED_STORE_OPTIMAL] | |
367 | #define TARGET_SSE_PACKED_SINGLE_INSN_OPTIMAL \ | |
368 | ix86_tune_features[X86_TUNE_SSE_PACKED_SINGLE_INSN_OPTIMAL] | |
80fd744f RH |
369 | #define TARGET_SSE_SPLIT_REGS ix86_tune_features[X86_TUNE_SSE_SPLIT_REGS] |
370 | #define TARGET_SSE_TYPELESS_STORES \ | |
371 | ix86_tune_features[X86_TUNE_SSE_TYPELESS_STORES] | |
372 | #define TARGET_SSE_LOAD0_BY_PXOR ix86_tune_features[X86_TUNE_SSE_LOAD0_BY_PXOR] | |
373 | #define TARGET_MEMORY_MISMATCH_STALL \ | |
374 | ix86_tune_features[X86_TUNE_MEMORY_MISMATCH_STALL] | |
375 | #define TARGET_PROLOGUE_USING_MOVE \ | |
376 | ix86_tune_features[X86_TUNE_PROLOGUE_USING_MOVE] | |
377 | #define TARGET_EPILOGUE_USING_MOVE \ | |
378 | ix86_tune_features[X86_TUNE_EPILOGUE_USING_MOVE] | |
379 | #define TARGET_SHIFT1 ix86_tune_features[X86_TUNE_SHIFT1] | |
380 | #define TARGET_USE_FFREEP ix86_tune_features[X86_TUNE_USE_FFREEP] | |
381 | #define TARGET_INTER_UNIT_MOVES ix86_tune_features[X86_TUNE_INTER_UNIT_MOVES] | |
630ecd8d JH |
382 | #define TARGET_INTER_UNIT_CONVERSIONS\ |
383 | ix86_tune_features[X86_TUNE_INTER_UNIT_CONVERSIONS] | |
80fd744f RH |
384 | #define TARGET_FOUR_JUMP_LIMIT ix86_tune_features[X86_TUNE_FOUR_JUMP_LIMIT] |
385 | #define TARGET_SCHEDULE ix86_tune_features[X86_TUNE_SCHEDULE] | |
386 | #define TARGET_USE_BT ix86_tune_features[X86_TUNE_USE_BT] | |
387 | #define TARGET_USE_INCDEC ix86_tune_features[X86_TUNE_USE_INCDEC] | |
388 | #define TARGET_PAD_RETURNS ix86_tune_features[X86_TUNE_PAD_RETURNS] | |
e7ed95a2 L |
389 | #define TARGET_PAD_SHORT_FUNCTION \ |
390 | ix86_tune_features[X86_TUNE_PAD_SHORT_FUNCTION] | |
80fd744f RH |
391 | #define TARGET_EXT_80387_CONSTANTS \ |
392 | ix86_tune_features[X86_TUNE_EXT_80387_CONSTANTS] | |
ddff69b9 MM |
393 | #define TARGET_SHORTEN_X87_SSE ix86_tune_features[X86_TUNE_SHORTEN_X87_SSE] |
394 | #define TARGET_AVOID_VECTOR_DECODE \ | |
395 | ix86_tune_features[X86_TUNE_AVOID_VECTOR_DECODE] | |
a646aded UB |
396 | #define TARGET_TUNE_PROMOTE_HIMODE_IMUL \ |
397 | ix86_tune_features[X86_TUNE_PROMOTE_HIMODE_IMUL] | |
ddff69b9 MM |
398 | #define TARGET_SLOW_IMUL_IMM32_MEM \ |
399 | ix86_tune_features[X86_TUNE_SLOW_IMUL_IMM32_MEM] | |
400 | #define TARGET_SLOW_IMUL_IMM8 ix86_tune_features[X86_TUNE_SLOW_IMUL_IMM8] | |
401 | #define TARGET_MOVE_M1_VIA_OR ix86_tune_features[X86_TUNE_MOVE_M1_VIA_OR] | |
402 | #define TARGET_NOT_UNPAIRABLE ix86_tune_features[X86_TUNE_NOT_UNPAIRABLE] | |
403 | #define TARGET_NOT_VECTORMODE ix86_tune_features[X86_TUNE_NOT_VECTORMODE] | |
54723b46 L |
404 | #define TARGET_USE_VECTOR_FP_CONVERTS \ |
405 | ix86_tune_features[X86_TUNE_USE_VECTOR_FP_CONVERTS] | |
354f84af UB |
406 | #define TARGET_USE_VECTOR_CONVERTS \ |
407 | ix86_tune_features[X86_TUNE_USE_VECTOR_CONVERTS] | |
408 | #define TARGET_FUSE_CMP_AND_BRANCH \ | |
409 | ix86_tune_features[X86_TUNE_FUSE_CMP_AND_BRANCH] | |
b6837b94 | 410 | #define TARGET_OPT_AGU ix86_tune_features[X86_TUNE_OPT_AGU] |
e72eba85 L |
411 | #define TARGET_VECTORIZE_DOUBLE \ |
412 | ix86_tune_features[X86_TUNE_VECTORIZE_DOUBLE] | |
80fd744f RH |
413 | |
414 | /* Feature tests against the various architecture variations. */ | |
415 | enum ix86_arch_indices { | |
416 | X86_ARCH_CMOVE, /* || TARGET_SSE */ | |
417 | X86_ARCH_CMPXCHG, | |
418 | X86_ARCH_CMPXCHG8B, | |
419 | X86_ARCH_XADD, | |
420 | X86_ARCH_BSWAP, | |
421 | ||
422 | X86_ARCH_LAST | |
423 | }; | |
4f3f76e6 | 424 | |
ab442df7 | 425 | extern unsigned char ix86_arch_features[X86_ARCH_LAST]; |
80fd744f RH |
426 | |
427 | #define TARGET_CMOVE ix86_arch_features[X86_ARCH_CMOVE] | |
428 | #define TARGET_CMPXCHG ix86_arch_features[X86_ARCH_CMPXCHG] | |
429 | #define TARGET_CMPXCHG8B ix86_arch_features[X86_ARCH_CMPXCHG8B] | |
430 | #define TARGET_XADD ix86_arch_features[X86_ARCH_XADD] | |
431 | #define TARGET_BSWAP ix86_arch_features[X86_ARCH_BSWAP] | |
432 | ||
433 | #define TARGET_FISTTP (TARGET_SSE3 && TARGET_80387) | |
434 | ||
435 | extern int x86_prefetch_sse; | |
0a1c5e55 | 436 | |
80fd744f RH |
437 | #define TARGET_PREFETCH_SSE x86_prefetch_sse |
438 | ||
80fd744f RH |
439 | #define ASSEMBLER_DIALECT (ix86_asm_dialect) |
440 | ||
441 | #define TARGET_SSE_MATH ((ix86_fpmath & FPMATH_SSE) != 0) | |
442 | #define TARGET_MIX_SSE_I387 \ | |
443 | ((ix86_fpmath & (FPMATH_SSE | FPMATH_387)) == (FPMATH_SSE | FPMATH_387)) | |
444 | ||
445 | #define TARGET_GNU_TLS (ix86_tls_dialect == TLS_DIALECT_GNU) | |
446 | #define TARGET_GNU2_TLS (ix86_tls_dialect == TLS_DIALECT_GNU2) | |
447 | #define TARGET_ANY_GNU_TLS (TARGET_GNU_TLS || TARGET_GNU2_TLS) | |
d2af65b9 | 448 | #define TARGET_SUN_TLS 0 |
1ef45b77 | 449 | |
67adf6a9 RH |
450 | #ifndef TARGET_64BIT_DEFAULT |
451 | #define TARGET_64BIT_DEFAULT 0 | |
25f94bb5 | 452 | #endif |
74dc3e94 RH |
453 | #ifndef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT |
454 | #define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT 0 | |
455 | #endif | |
25f94bb5 | 456 | |
79f5e442 ZD |
457 | /* Fence to use after loop using storent. */ |
458 | ||
459 | extern tree x86_mfence; | |
460 | #define FENCE_FOLLOWING_MOVNT x86_mfence | |
461 | ||
0ed4a390 JL |
462 | /* Once GDB has been enhanced to deal with functions without frame |
463 | pointers, we can change this to allow for elimination of | |
464 | the frame pointer in leaf functions. */ | |
465 | #define TARGET_DEFAULT 0 | |
67adf6a9 | 466 | |
0a1c5e55 UB |
467 | /* Extra bits to force. */ |
468 | #define TARGET_SUBTARGET_DEFAULT 0 | |
469 | #define TARGET_SUBTARGET_ISA_DEFAULT 0 | |
470 | ||
471 | /* Extra bits to force on w/ 32-bit mode. */ | |
472 | #define TARGET_SUBTARGET32_DEFAULT 0 | |
473 | #define TARGET_SUBTARGET32_ISA_DEFAULT 0 | |
474 | ||
ccf8e764 RH |
475 | /* Extra bits to force on w/ 64-bit mode. */ |
476 | #define TARGET_SUBTARGET64_DEFAULT 0 | |
0a1c5e55 | 477 | #define TARGET_SUBTARGET64_ISA_DEFAULT 0 |
ccf8e764 | 478 | |
b069de3b SS |
479 | /* This is not really a target flag, but is done this way so that |
480 | it's analogous to similar code for Mach-O on PowerPC. darwin.h | |
481 | redefines this to 1. */ | |
482 | #define TARGET_MACHO 0 | |
483 | ||
9005471b IS |
484 | /* Branch island 'stubs' are emitted for earlier versions of darwin. |
485 | This provides a default (over-ridden in darwin.h.) */ | |
486 | #ifndef TARGET_MACHO_BRANCH_ISLANDS | |
487 | #define TARGET_MACHO_BRANCH_ISLANDS 0 | |
488 | #endif | |
489 | ||
490 | /* For the Windows 64-bit ABI. */ | |
7c800926 KT |
491 | #define TARGET_64BIT_MS_ABI (TARGET_64BIT && ix86_cfun_abi () == MS_ABI) |
492 | ||
493 | /* Available call abi. */ | |
35cbb299 | 494 | enum calling_abi |
7c800926 KT |
495 | { |
496 | SYSV_ABI = 0, | |
497 | MS_ABI = 1 | |
498 | }; | |
499 | ||
51212b32 L |
500 | /* The abi used by target. */ |
501 | extern enum calling_abi ix86_abi; | |
502 | ||
503 | /* The default abi used by target. */ | |
7c800926 | 504 | #define DEFAULT_ABI SYSV_ABI |
ccf8e764 | 505 | |
cc69336f RH |
506 | /* Subtargets may reset this to 1 in order to enable 96-bit long double |
507 | with the rounding mode forced to 53 bits. */ | |
508 | #define TARGET_96_ROUND_53_LONG_DOUBLE 0 | |
509 | ||
682cd442 GK |
510 | /* -march=native handling only makes sense with compiler running on |
511 | an x86 or x86_64 chip. If changing this condition, also change | |
512 | the condition in driver-i386.c. */ | |
513 | #if defined(__i386__) || defined(__x86_64__) | |
fa959ce4 MM |
514 | /* In driver-i386.c. */ |
515 | extern const char *host_detect_local_cpu (int argc, const char **argv); | |
516 | #define EXTRA_SPEC_FUNCTIONS \ | |
517 | { "local_cpu_detect", host_detect_local_cpu }, | |
682cd442 | 518 | #define HAVE_LOCAL_CPU_DETECT |
fa959ce4 MM |
519 | #endif |
520 | ||
8981c15b JM |
521 | #if TARGET_64BIT_DEFAULT |
522 | #define OPT_ARCH64 "!m32" | |
523 | #define OPT_ARCH32 "m32" | |
524 | #else | |
525 | #define OPT_ARCH64 "m64" | |
526 | #define OPT_ARCH32 "!m64" | |
527 | #endif | |
528 | ||
1cba2b96 EC |
529 | /* Support for configure-time defaults of some command line options. |
530 | The order here is important so that -march doesn't squash the | |
531 | tune or cpu values. */ | |
ce998900 | 532 | #define OPTION_DEFAULT_SPECS \ |
da2d4c01 | 533 | {"tune", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \ |
8981c15b JM |
534 | {"tune_32", "%{" OPT_ARCH32 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \ |
535 | {"tune_64", "%{" OPT_ARCH64 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \ | |
ce998900 | 536 | {"cpu", "%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}" }, \ |
8981c15b JM |
537 | {"cpu_32", "%{" OPT_ARCH32 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \ |
538 | {"cpu_64", "%{" OPT_ARCH64 ":%{!mtune=*:%{!mcpu=*:%{!march=*:-mtune=%(VALUE)}}}}" }, \ | |
539 | {"arch", "%{!march=*:-march=%(VALUE)}"}, \ | |
540 | {"arch_32", "%{" OPT_ARCH32 ":%{!march=*:-march=%(VALUE)}}"}, \ | |
541 | {"arch_64", "%{" OPT_ARCH64 ":%{!march=*:-march=%(VALUE)}}"}, | |
7816bea0 | 542 | |
241e1a89 SC |
543 | /* Specs for the compiler proper */ |
544 | ||
628714d8 | 545 | #ifndef CC1_CPU_SPEC |
fa959ce4 | 546 | #define CC1_CPU_SPEC_1 "\ |
5c1a2bb1 | 547 | %{msse5:-mavx \ |
2d2bd949 | 548 | %n'-msse5' was removed.\n}" |
fa959ce4 | 549 | |
682cd442 | 550 | #ifndef HAVE_LOCAL_CPU_DETECT |
fa959ce4 MM |
551 | #define CC1_CPU_SPEC CC1_CPU_SPEC_1 |
552 | #else | |
553 | #define CC1_CPU_SPEC CC1_CPU_SPEC_1 \ | |
edccdcb1 L |
554 | "%{march=native:%<march=native %:local_cpu_detect(arch) \ |
555 | %{!mtune=*:%<mtune=native %:local_cpu_detect(tune)}} \ | |
fa959ce4 MM |
556 | %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}" |
557 | #endif | |
241e1a89 | 558 | #endif |
c98f8742 | 559 | \f |
30efe578 | 560 | /* Target CPU builtins. */ |
ab442df7 MM |
561 | #define TARGET_CPU_CPP_BUILTINS() ix86_target_macros () |
562 | ||
563 | /* Target Pragmas. */ | |
564 | #define REGISTER_TARGET_PRAGMAS() ix86_register_pragmas () | |
30efe578 | 565 | |
c2f17e19 UB |
566 | enum target_cpu_default |
567 | { | |
568 | TARGET_CPU_DEFAULT_generic = 0, | |
569 | ||
570 | TARGET_CPU_DEFAULT_i386, | |
571 | TARGET_CPU_DEFAULT_i486, | |
572 | TARGET_CPU_DEFAULT_pentium, | |
573 | TARGET_CPU_DEFAULT_pentium_mmx, | |
574 | TARGET_CPU_DEFAULT_pentiumpro, | |
575 | TARGET_CPU_DEFAULT_pentium2, | |
576 | TARGET_CPU_DEFAULT_pentium3, | |
577 | TARGET_CPU_DEFAULT_pentium4, | |
578 | TARGET_CPU_DEFAULT_pentium_m, | |
579 | TARGET_CPU_DEFAULT_prescott, | |
580 | TARGET_CPU_DEFAULT_nocona, | |
581 | TARGET_CPU_DEFAULT_core2, | |
b6837b94 | 582 | TARGET_CPU_DEFAULT_atom, |
c2f17e19 UB |
583 | |
584 | TARGET_CPU_DEFAULT_geode, | |
585 | TARGET_CPU_DEFAULT_k6, | |
586 | TARGET_CPU_DEFAULT_k6_2, | |
587 | TARGET_CPU_DEFAULT_k6_3, | |
588 | TARGET_CPU_DEFAULT_athlon, | |
589 | TARGET_CPU_DEFAULT_athlon_sse, | |
590 | TARGET_CPU_DEFAULT_k8, | |
591 | TARGET_CPU_DEFAULT_amdfam10, | |
1133125e | 592 | TARGET_CPU_DEFAULT_bdver1, |
c2f17e19 UB |
593 | |
594 | TARGET_CPU_DEFAULT_max | |
595 | }; | |
0c2dc519 | 596 | |
628714d8 | 597 | #ifndef CC1_SPEC |
8015b78d | 598 | #define CC1_SPEC "%(cc1_cpu) " |
628714d8 RK |
599 | #endif |
600 | ||
601 | /* This macro defines names of additional specifications to put in the | |
602 | specs that can be used in various specifications like CC1_SPEC. Its | |
603 | definition is an initializer with a subgrouping for each command option. | |
bcd86433 SC |
604 | |
605 | Each subgrouping contains a string constant, that defines the | |
188fc5b5 | 606 | specification name, and a string constant that used by the GCC driver |
bcd86433 SC |
607 | program. |
608 | ||
609 | Do not define this macro if it does not need to do anything. */ | |
610 | ||
611 | #ifndef SUBTARGET_EXTRA_SPECS | |
612 | #define SUBTARGET_EXTRA_SPECS | |
613 | #endif | |
614 | ||
615 | #define EXTRA_SPECS \ | |
628714d8 | 616 | { "cc1_cpu", CC1_CPU_SPEC }, \ |
bcd86433 SC |
617 | SUBTARGET_EXTRA_SPECS |
618 | \f | |
ce998900 | 619 | |
d57a4b98 RH |
620 | /* Set the value of FLT_EVAL_METHOD in float.h. When using only the |
621 | FPU, assume that the fpcw is set to extended precision; when using | |
622 | only SSE, rounding is correct; when using both SSE and the FPU, | |
623 | the rounding precision is indeterminate, since either may be chosen | |
624 | apparently at random. */ | |
625 | #define TARGET_FLT_EVAL_METHOD \ | |
5ccd517a | 626 | (TARGET_MIX_SSE_I387 ? -1 : TARGET_SSE_MATH ? 0 : 2) |
0038aea6 | 627 | |
8ce94e44 JM |
628 | /* Whether to allow x87 floating-point arithmetic on MODE (one of |
629 | SFmode, DFmode and XFmode) in the current excess precision | |
630 | configuration. */ | |
631 | #define X87_ENABLE_ARITH(MODE) \ | |
632 | (flag_excess_precision == EXCESS_PRECISION_FAST || (MODE) == XFmode) | |
633 | ||
634 | /* Likewise, whether to allow direct conversions from integer mode | |
635 | IMODE (HImode, SImode or DImode) to MODE. */ | |
636 | #define X87_ENABLE_FLOAT(MODE, IMODE) \ | |
637 | (flag_excess_precision == EXCESS_PRECISION_FAST \ | |
638 | || (MODE) == XFmode \ | |
639 | || ((MODE) == DFmode && (IMODE) == SImode) \ | |
640 | || (IMODE) == HImode) | |
641 | ||
979c67a5 UB |
642 | /* target machine storage layout */ |
643 | ||
65d9c0ab JH |
644 | #define SHORT_TYPE_SIZE 16 |
645 | #define INT_TYPE_SIZE 32 | |
a96ad348 | 646 | #define LONG_LONG_TYPE_SIZE 64 |
65d9c0ab | 647 | #define FLOAT_TYPE_SIZE 32 |
65d9c0ab | 648 | #define DOUBLE_TYPE_SIZE 64 |
979c67a5 UB |
649 | #define LONG_DOUBLE_TYPE_SIZE 80 |
650 | ||
651 | #define WIDEST_HARDWARE_FP_SIZE LONG_DOUBLE_TYPE_SIZE | |
65d9c0ab | 652 | |
67adf6a9 | 653 | #if defined (TARGET_BI_ARCH) || TARGET_64BIT_DEFAULT |
0c2dc519 | 654 | #define MAX_BITS_PER_WORD 64 |
0c2dc519 JH |
655 | #else |
656 | #define MAX_BITS_PER_WORD 32 | |
0c2dc519 JH |
657 | #endif |
658 | ||
c98f8742 JVA |
659 | /* Define this if most significant byte of a word is the lowest numbered. */ |
660 | /* That is true on the 80386. */ | |
661 | ||
662 | #define BITS_BIG_ENDIAN 0 | |
663 | ||
664 | /* Define this if most significant byte of a word is the lowest numbered. */ | |
665 | /* That is not true on the 80386. */ | |
666 | #define BYTES_BIG_ENDIAN 0 | |
667 | ||
668 | /* Define this if most significant word of a multiword number is the lowest | |
669 | numbered. */ | |
670 | /* Not true for 80386 */ | |
671 | #define WORDS_BIG_ENDIAN 0 | |
672 | ||
c98f8742 | 673 | /* Width of a word, in units (bytes). */ |
4ae8027b | 674 | #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4) |
63001560 UB |
675 | |
676 | #ifndef IN_LIBGCC2 | |
2e64c636 JH |
677 | #define MIN_UNITS_PER_WORD 4 |
678 | #endif | |
c98f8742 | 679 | |
c98f8742 | 680 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ |
65d9c0ab | 681 | #define PARM_BOUNDARY BITS_PER_WORD |
c98f8742 | 682 | |
e075ae69 | 683 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
4ae8027b | 684 | #define STACK_BOUNDARY \ |
51212b32 | 685 | (TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD) |
c98f8742 | 686 | |
2e3f842f L |
687 | /* Stack boundary of the main function guaranteed by OS. */ |
688 | #define MAIN_STACK_BOUNDARY (TARGET_64BIT ? 128 : 32) | |
689 | ||
de1132d1 L |
690 | /* Minimum stack boundary. */ |
691 | #define MIN_STACK_BOUNDARY (TARGET_64BIT ? 128 : 32) | |
2e3f842f | 692 | |
d1f87653 | 693 | /* Boundary (in *bits*) on which the stack pointer prefers to be |
3af4bd89 | 694 | aligned; the compiler cannot rely on having this alignment. */ |
e075ae69 | 695 | #define PREFERRED_STACK_BOUNDARY ix86_preferred_stack_boundary |
65954bd8 | 696 | |
de1132d1 | 697 | /* It should be MIN_STACK_BOUNDARY. But we set it to 128 bits for |
2e3f842f L |
698 | both 32bit and 64bit, to support codes that need 128 bit stack |
699 | alignment for SSE instructions, but can't realign the stack. */ | |
700 | #define PREFERRED_STACK_BOUNDARY_DEFAULT 128 | |
701 | ||
702 | /* 1 if -mstackrealign should be turned on by default. It will | |
703 | generate an alternate prologue and epilogue that realigns the | |
704 | runtime stack if nessary. This supports mixing codes that keep a | |
705 | 4-byte aligned stack, as specified by i386 psABI, with codes that | |
890b9b96 | 706 | need a 16-byte aligned stack, as required by SSE instructions. */ |
2e3f842f L |
707 | #define STACK_REALIGN_DEFAULT 0 |
708 | ||
709 | /* Boundary (in *bits*) on which the incoming stack is aligned. */ | |
710 | #define INCOMING_STACK_BOUNDARY ix86_incoming_stack_boundary | |
1d482056 | 711 | |
ebff937c SH |
712 | /* Target OS keeps a vector-aligned (128-bit, 16-byte) stack. This is |
713 | mandatory for the 64-bit ABI, and may or may not be true for other | |
714 | operating systems. */ | |
715 | #define TARGET_KEEPS_VECTOR_ALIGNED_STACK TARGET_64BIT | |
716 | ||
f963b5d9 RS |
717 | /* Minimum allocation boundary for the code of a function. */ |
718 | #define FUNCTION_BOUNDARY 8 | |
719 | ||
720 | /* C++ stores the virtual bit in the lowest bit of function pointers. */ | |
721 | #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_pfn | |
c98f8742 | 722 | |
c98f8742 JVA |
723 | /* Minimum size in bits of the largest boundary to which any |
724 | and all fundamental data types supported by the hardware | |
725 | might need to be aligned. No data type wants to be aligned | |
17f24ff0 | 726 | rounder than this. |
fce5a9f2 | 727 | |
d1f87653 | 728 | Pentium+ prefers DFmode values to be aligned to 64 bit boundary |
17f24ff0 JH |
729 | and Pentium Pro XFmode values at 128 bit boundaries. */ |
730 | ||
2824d6e5 | 731 | #define BIGGEST_ALIGNMENT (TARGET_AVX ? 256 : 128) |
17f24ff0 | 732 | |
2e3f842f L |
733 | /* Maximum stack alignment. */ |
734 | #define MAX_STACK_ALIGNMENT MAX_OFILE_ALIGNMENT | |
735 | ||
6e4f1168 L |
736 | /* Alignment value for attribute ((aligned)). It is a constant since |
737 | it is the part of the ABI. We shouldn't change it with -mavx. */ | |
738 | #define ATTRIBUTE_ALIGNED_VALUE 128 | |
739 | ||
822eda12 | 740 | /* Decide whether a variable of mode MODE should be 128 bit aligned. */ |
a7180f70 | 741 | #define ALIGN_MODE_128(MODE) \ |
4501d314 | 742 | ((MODE) == XFmode || SSE_REG_MODE_P (MODE)) |
a7180f70 | 743 | |
17f24ff0 | 744 | /* The published ABIs say that doubles should be aligned on word |
d1f87653 | 745 | boundaries, so lower the alignment for structure fields unless |
6fc605d8 | 746 | -malign-double is set. */ |
e932b21b | 747 | |
e83f3cff RH |
748 | /* ??? Blah -- this macro is used directly by libobjc. Since it |
749 | supports no vector modes, cut out the complexity and fall back | |
750 | on BIGGEST_FIELD_ALIGNMENT. */ | |
751 | #ifdef IN_TARGET_LIBS | |
ef49d42e JH |
752 | #ifdef __x86_64__ |
753 | #define BIGGEST_FIELD_ALIGNMENT 128 | |
754 | #else | |
e83f3cff | 755 | #define BIGGEST_FIELD_ALIGNMENT 32 |
ef49d42e | 756 | #endif |
e83f3cff | 757 | #else |
e932b21b JH |
758 | #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ |
759 | x86_field_alignment (FIELD, COMPUTED) | |
e83f3cff | 760 | #endif |
c98f8742 | 761 | |
e5e8a8bf | 762 | /* If defined, a C expression to compute the alignment given to a |
a7180f70 | 763 | constant that is being placed in memory. EXP is the constant |
e5e8a8bf JW |
764 | and ALIGN is the alignment that the object would ordinarily have. |
765 | The value of this macro is used instead of that alignment to align | |
766 | the object. | |
767 | ||
768 | If this macro is not defined, then ALIGN is used. | |
769 | ||
770 | The typical use of this macro is to increase alignment for string | |
771 | constants to be word aligned so that `strcpy' calls that copy | |
772 | constants can be done inline. */ | |
773 | ||
d9a5f180 | 774 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) ix86_constant_alignment ((EXP), (ALIGN)) |
d4ba09c0 | 775 | |
8a022443 JW |
776 | /* If defined, a C expression to compute the alignment for a static |
777 | variable. TYPE is the data type, and ALIGN is the alignment that | |
778 | the object would ordinarily have. The value of this macro is used | |
779 | instead of that alignment to align the object. | |
780 | ||
781 | If this macro is not defined, then ALIGN is used. | |
782 | ||
783 | One use of this macro is to increase alignment of medium-size | |
784 | data to make it all fit in fewer cache lines. Another is to | |
785 | cause character arrays to be word-aligned so that `strcpy' calls | |
786 | that copy constants to character arrays can be done inline. */ | |
787 | ||
d9a5f180 | 788 | #define DATA_ALIGNMENT(TYPE, ALIGN) ix86_data_alignment ((TYPE), (ALIGN)) |
d16790f2 JW |
789 | |
790 | /* If defined, a C expression to compute the alignment for a local | |
791 | variable. TYPE is the data type, and ALIGN is the alignment that | |
792 | the object would ordinarily have. The value of this macro is used | |
793 | instead of that alignment to align the object. | |
794 | ||
795 | If this macro is not defined, then ALIGN is used. | |
796 | ||
797 | One use of this macro is to increase alignment of medium-size | |
798 | data to make it all fit in fewer cache lines. */ | |
799 | ||
76fe54f0 L |
800 | #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ |
801 | ix86_local_alignment ((TYPE), VOIDmode, (ALIGN)) | |
802 | ||
803 | /* If defined, a C expression to compute the alignment for stack slot. | |
804 | TYPE is the data type, MODE is the widest mode available, and ALIGN | |
805 | is the alignment that the slot would ordinarily have. The value of | |
806 | this macro is used instead of that alignment to align the slot. | |
807 | ||
808 | If this macro is not defined, then ALIGN is used when TYPE is NULL, | |
809 | Otherwise, LOCAL_ALIGNMENT will be used. | |
810 | ||
811 | One use of this macro is to set alignment of stack slot to the | |
812 | maximum alignment of all possible modes which the slot may have. */ | |
813 | ||
814 | #define STACK_SLOT_ALIGNMENT(TYPE, MODE, ALIGN) \ | |
815 | ix86_local_alignment ((TYPE), (MODE), (ALIGN)) | |
8a022443 | 816 | |
9bfaf89d JJ |
817 | /* If defined, a C expression to compute the alignment for a local |
818 | variable DECL. | |
819 | ||
820 | If this macro is not defined, then | |
821 | LOCAL_ALIGNMENT (TREE_TYPE (DECL), DECL_ALIGN (DECL)) will be used. | |
822 | ||
823 | One use of this macro is to increase alignment of medium-size | |
824 | data to make it all fit in fewer cache lines. */ | |
825 | ||
826 | #define LOCAL_DECL_ALIGNMENT(DECL) \ | |
827 | ix86_local_alignment ((DECL), VOIDmode, DECL_ALIGN (DECL)) | |
828 | ||
ae58e548 JJ |
829 | /* If defined, a C expression to compute the minimum required alignment |
830 | for dynamic stack realignment purposes for EXP (a TYPE or DECL), | |
831 | MODE, assuming normal alignment ALIGN. | |
832 | ||
833 | If this macro is not defined, then (ALIGN) will be used. */ | |
834 | ||
835 | #define MINIMUM_ALIGNMENT(EXP, MODE, ALIGN) \ | |
836 | ix86_minimum_alignment (EXP, MODE, ALIGN) | |
837 | ||
9bfaf89d | 838 | |
53c17031 JH |
839 | /* If defined, a C expression that gives the alignment boundary, in |
840 | bits, of an argument with the specified mode and type. If it is | |
841 | not defined, `PARM_BOUNDARY' is used for all arguments. */ | |
842 | ||
d9a5f180 GS |
843 | #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ |
844 | ix86_function_arg_boundary ((MODE), (TYPE)) | |
53c17031 | 845 | |
9cd10576 | 846 | /* Set this nonzero if move instructions will actually fail to work |
c98f8742 | 847 | when given unaligned data. */ |
b4ac57ab | 848 | #define STRICT_ALIGNMENT 0 |
c98f8742 JVA |
849 | |
850 | /* If bit field type is int, don't let it cross an int, | |
851 | and give entire struct the alignment of an int. */ | |
43a88a8c | 852 | /* Required on the 386 since it doesn't have bit-field insns. */ |
c98f8742 | 853 | #define PCC_BITFIELD_TYPE_MATTERS 1 |
c98f8742 JVA |
854 | \f |
855 | /* Standard register usage. */ | |
856 | ||
857 | /* This processor has special stack-like registers. See reg-stack.c | |
892a2d68 | 858 | for details. */ |
c98f8742 JVA |
859 | |
860 | #define STACK_REGS | |
ce998900 | 861 | |
d9a5f180 | 862 | #define IS_STACK_MODE(MODE) \ |
63001560 UB |
863 | (((MODE) == SFmode && !(TARGET_SSE && TARGET_SSE_MATH)) \ |
864 | || ((MODE) == DFmode && !(TARGET_SSE2 && TARGET_SSE_MATH)) \ | |
b5c82fa1 | 865 | || (MODE) == XFmode) |
c98f8742 | 866 | |
1833192f VM |
867 | /* Cover class containing the stack registers. */ |
868 | #define STACK_REG_COVER_CLASS FLOAT_REGS | |
869 | ||
c98f8742 JVA |
870 | /* Number of actual hardware registers. |
871 | The hardware registers are assigned numbers for the compiler | |
872 | from 0 to just below FIRST_PSEUDO_REGISTER. | |
873 | All registers that the compiler knows about must be given numbers, | |
874 | even those that are not normally considered general registers. | |
875 | ||
876 | In the 80386 we give the 8 general purpose registers the numbers 0-7. | |
877 | We number the floating point registers 8-15. | |
878 | Note that registers 0-7 can be accessed as a short or int, | |
879 | while only 0-3 may be used with byte `mov' instructions. | |
880 | ||
881 | Reg 16 does not correspond to any hardware register, but instead | |
882 | appears in the RTL as an argument pointer prior to reload, and is | |
883 | eliminated during reloading in favor of either the stack or frame | |
892a2d68 | 884 | pointer. */ |
c98f8742 | 885 | |
b0d95de8 | 886 | #define FIRST_PSEUDO_REGISTER 53 |
c98f8742 | 887 | |
3073d01c ML |
888 | /* Number of hardware registers that go into the DWARF-2 unwind info. |
889 | If not defined, equals FIRST_PSEUDO_REGISTER. */ | |
890 | ||
891 | #define DWARF_FRAME_REGISTERS 17 | |
892 | ||
c98f8742 JVA |
893 | /* 1 for registers that have pervasive standard uses |
894 | and are not available for the register allocator. | |
3f3f2124 | 895 | On the 80386, the stack pointer is such, as is the arg pointer. |
fce5a9f2 | 896 | |
3a4416fb RS |
897 | The value is zero if the register is not fixed on either 32 or |
898 | 64 bit targets, one if the register if fixed on both 32 and 64 | |
899 | bit targets, two if it is only fixed on 32bit targets and three | |
900 | if its only fixed on 64bit targets. | |
901 | Proper values are computed in the CONDITIONAL_REGISTER_USAGE. | |
3f3f2124 | 902 | */ |
a7180f70 BS |
903 | #define FIXED_REGISTERS \ |
904 | /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ | |
3a4416fb | 905 | { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, \ |
b0d95de8 UB |
906 | /*arg,flags,fpsr,fpcr,frame*/ \ |
907 | 1, 1, 1, 1, 1, \ | |
a7180f70 BS |
908 | /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
909 | 0, 0, 0, 0, 0, 0, 0, 0, \ | |
78168632 | 910 | /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \ |
3f3f2124 JH |
911 | 0, 0, 0, 0, 0, 0, 0, 0, \ |
912 | /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ | |
3a4416fb | 913 | 2, 2, 2, 2, 2, 2, 2, 2, \ |
3f3f2124 | 914 | /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ |
ce998900 | 915 | 2, 2, 2, 2, 2, 2, 2, 2 } |
fce5a9f2 | 916 | |
c98f8742 JVA |
917 | |
918 | /* 1 for registers not available across function calls. | |
919 | These must include the FIXED_REGISTERS and also any | |
920 | registers that can be used without being saved. | |
921 | The latter must include the registers where values are returned | |
922 | and the register where structure-value addresses are passed. | |
fce5a9f2 EC |
923 | Aside from that, you can include as many other registers as you like. |
924 | ||
9d72d996 JJ |
925 | The value is zero if the register is not call used on either 32 or |
926 | 64 bit targets, one if the register if call used on both 32 and 64 | |
927 | bit targets, two if it is only call used on 32bit targets and three | |
928 | if its only call used on 64bit targets. | |
3a4416fb | 929 | Proper values are computed in the CONDITIONAL_REGISTER_USAGE. |
3f3f2124 | 930 | */ |
a7180f70 BS |
931 | #define CALL_USED_REGISTERS \ |
932 | /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ | |
3a4416fb | 933 | { 1, 1, 1, 0, 3, 3, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
b0d95de8 UB |
934 | /*arg,flags,fpsr,fpcr,frame*/ \ |
935 | 1, 1, 1, 1, 1, \ | |
a7180f70 | 936 | /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
03c259ad | 937 | 1, 1, 1, 1, 1, 1, 1, 1, \ |
78168632 | 938 | /* mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7*/ \ |
3a4416fb | 939 | 1, 1, 1, 1, 1, 1, 1, 1, \ |
3f3f2124 | 940 | /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ |
3a4416fb | 941 | 1, 1, 1, 1, 2, 2, 2, 2, \ |
3f3f2124 | 942 | /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ |
ce998900 | 943 | 1, 1, 1, 1, 1, 1, 1, 1 } |
c98f8742 | 944 | |
3b3c6a3f MM |
945 | /* Order in which to allocate registers. Each register must be |
946 | listed once, even those in FIXED_REGISTERS. List frame pointer | |
947 | late and fixed registers last. Note that, in general, we prefer | |
948 | registers listed in CALL_USED_REGISTERS, keeping the others | |
949 | available for storage of persistent values. | |
950 | ||
5a733826 | 951 | The ADJUST_REG_ALLOC_ORDER actually overwrite the order, |
162f023b | 952 | so this is just empty initializer for array. */ |
3b3c6a3f | 953 | |
162f023b JH |
954 | #define REG_ALLOC_ORDER \ |
955 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,\ | |
956 | 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, \ | |
957 | 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \ | |
b0d95de8 | 958 | 48, 49, 50, 51, 52 } |
3b3c6a3f | 959 | |
5a733826 | 960 | /* ADJUST_REG_ALLOC_ORDER is a macro which permits reg_alloc_order |
162f023b | 961 | to be rearranged based on a particular function. When using sse math, |
03c259ad | 962 | we want to allocate SSE before x87 registers and vice versa. */ |
3b3c6a3f | 963 | |
5a733826 | 964 | #define ADJUST_REG_ALLOC_ORDER x86_order_regs_for_local_alloc () |
3b3c6a3f | 965 | |
f5316dfe | 966 | |
7c800926 KT |
967 | #define OVERRIDE_ABI_FORMAT(FNDECL) ix86_call_abi_override (FNDECL) |
968 | ||
c98f8742 | 969 | /* Macro to conditionally modify fixed_regs/call_used_regs. */ |
ac2e563f | 970 | #define CONDITIONAL_REGISTER_USAGE ix86_conditional_register_usage () |
c98f8742 JVA |
971 | |
972 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
973 | to hold something of mode MODE. | |
974 | This is ordinarily the length in words of a value of mode MODE | |
975 | but can be less for certain modes in special long registers. | |
976 | ||
fce5a9f2 | 977 | Actually there are no two word move instructions for consecutive |
c98f8742 | 978 | registers. And only registers 0-3 may have mov byte instructions |
63001560 | 979 | applied to them. */ |
c98f8742 | 980 | |
ce998900 | 981 | #define HARD_REGNO_NREGS(REGNO, MODE) \ |
92d0fb09 JH |
982 | (FP_REGNO_P (REGNO) || SSE_REGNO_P (REGNO) || MMX_REGNO_P (REGNO) \ |
983 | ? (COMPLEX_MODE_P (MODE) ? 2 : 1) \ | |
f8a1ebc6 | 984 | : ((MODE) == XFmode \ |
92d0fb09 | 985 | ? (TARGET_64BIT ? 2 : 3) \ |
f8a1ebc6 | 986 | : (MODE) == XCmode \ |
92d0fb09 | 987 | ? (TARGET_64BIT ? 4 : 6) \ |
2b589241 | 988 | : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))) |
c98f8742 | 989 | |
8521c414 JM |
990 | #define HARD_REGNO_NREGS_HAS_PADDING(REGNO, MODE) \ |
991 | ((TARGET_128BIT_LONG_DOUBLE && !TARGET_64BIT) \ | |
992 | ? (FP_REGNO_P (REGNO) || SSE_REGNO_P (REGNO) || MMX_REGNO_P (REGNO) \ | |
993 | ? 0 \ | |
994 | : ((MODE) == XFmode || (MODE) == XCmode)) \ | |
995 | : 0) | |
996 | ||
997 | #define HARD_REGNO_NREGS_WITH_PADDING(REGNO, MODE) ((MODE) == XFmode ? 4 : 8) | |
998 | ||
95879c72 L |
999 | #define VALID_AVX256_REG_MODE(MODE) \ |
1000 | ((MODE) == V32QImode || (MODE) == V16HImode || (MODE) == V8SImode \ | |
1001 | || (MODE) == V4DImode || (MODE) == V8SFmode || (MODE) == V4DFmode) | |
1002 | ||
ce998900 UB |
1003 | #define VALID_SSE2_REG_MODE(MODE) \ |
1004 | ((MODE) == V16QImode || (MODE) == V8HImode || (MODE) == V2DFmode \ | |
1005 | || (MODE) == V2DImode || (MODE) == DFmode) | |
fbe5eb6d | 1006 | |
d9a5f180 | 1007 | #define VALID_SSE_REG_MODE(MODE) \ |
fe6ae2da UB |
1008 | ((MODE) == V1TImode || (MODE) == TImode \ |
1009 | || (MODE) == V4SFmode || (MODE) == V4SImode \ | |
ce998900 | 1010 | || (MODE) == SFmode || (MODE) == TFmode) |
a7180f70 | 1011 | |
47f339cf | 1012 | #define VALID_MMX_REG_MODE_3DNOW(MODE) \ |
ce998900 | 1013 | ((MODE) == V2SFmode || (MODE) == SFmode) |
47f339cf | 1014 | |
d9a5f180 | 1015 | #define VALID_MMX_REG_MODE(MODE) \ |
10a97ae6 UB |
1016 | ((MODE == V1DImode) || (MODE) == DImode \ |
1017 | || (MODE) == V2SImode || (MODE) == SImode \ | |
1018 | || (MODE) == V4HImode || (MODE) == V8QImode) | |
a7180f70 | 1019 | |
ce998900 UB |
1020 | #define VALID_DFP_MODE_P(MODE) \ |
1021 | ((MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode) | |
62d75179 | 1022 | |
d9a5f180 | 1023 | #define VALID_FP_MODE_P(MODE) \ |
ce998900 UB |
1024 | ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode \ |
1025 | || (MODE) == SCmode || (MODE) == DCmode || (MODE) == XCmode) \ | |
a946dd00 | 1026 | |
d9a5f180 | 1027 | #define VALID_INT_MODE_P(MODE) \ |
ce998900 UB |
1028 | ((MODE) == QImode || (MODE) == HImode || (MODE) == SImode \ |
1029 | || (MODE) == DImode \ | |
1030 | || (MODE) == CQImode || (MODE) == CHImode || (MODE) == CSImode \ | |
1031 | || (MODE) == CDImode \ | |
1032 | || (TARGET_64BIT && ((MODE) == TImode || (MODE) == CTImode \ | |
1033 | || (MODE) == TFmode || (MODE) == TCmode))) | |
a946dd00 | 1034 | |
822eda12 | 1035 | /* Return true for modes passed in SSE registers. */ |
ce998900 | 1036 | #define SSE_REG_MODE_P(MODE) \ |
fe6ae2da UB |
1037 | ((MODE) == V1TImode || (MODE) == TImode || (MODE) == V16QImode \ |
1038 | || (MODE) == TFmode || (MODE) == V8HImode || (MODE) == V2DFmode \ | |
1039 | || (MODE) == V2DImode || (MODE) == V4SFmode || (MODE) == V4SImode \ | |
1040 | || (MODE) == V32QImode || (MODE) == V16HImode || (MODE) == V8SImode \ | |
1041 | || (MODE) == V4DImode || (MODE) == V8SFmode || (MODE) == V4DFmode) | |
822eda12 | 1042 | |
e075ae69 | 1043 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */ |
48227a2c | 1044 | |
a946dd00 | 1045 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
d9a5f180 | 1046 | ix86_hard_regno_mode_ok ((REGNO), (MODE)) |
c98f8742 JVA |
1047 | |
1048 | /* Value is 1 if it is a good idea to tie two pseudo registers | |
1049 | when one has mode MODE1 and one has mode MODE2. | |
1050 | If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, | |
1051 | for any hard reg, then this must be 0 for correct output. */ | |
1052 | ||
c1c5b5e3 | 1053 | #define MODES_TIEABLE_P(MODE1, MODE2) ix86_modes_tieable_p (MODE1, MODE2) |
d2836273 | 1054 | |
ff25ef99 ZD |
1055 | /* It is possible to write patterns to move flags; but until someone |
1056 | does it, */ | |
1057 | #define AVOID_CCMODE_COPIES | |
c98f8742 | 1058 | |
e075ae69 | 1059 | /* Specify the modes required to caller save a given hard regno. |
787dc842 | 1060 | We do this on i386 to prevent flags from being saved at all. |
e075ae69 | 1061 | |
787dc842 JH |
1062 | Kill any attempts to combine saving of modes. */ |
1063 | ||
d9a5f180 GS |
1064 | #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \ |
1065 | (CC_REGNO_P (REGNO) ? VOIDmode \ | |
1066 | : (MODE) == VOIDmode && (NREGS) != 1 ? VOIDmode \ | |
ce998900 | 1067 | : (MODE) == VOIDmode ? choose_hard_reg_mode ((REGNO), (NREGS), false) \ |
d9a5f180 | 1068 | : (MODE) == HImode && !TARGET_PARTIAL_REG_STALL ? SImode \ |
6c6094f1 | 1069 | : (MODE) == QImode && (REGNO) > BX_REG && !TARGET_64BIT ? SImode \ |
d2836273 | 1070 | : (MODE)) |
ce998900 | 1071 | |
51ba747a RH |
1072 | /* The only ABI that saves SSE registers across calls is Win64 (thus no |
1073 | need to check the current ABI here), and with AVX enabled Win64 only | |
1074 | guarantees that the low 16 bytes are saved. */ | |
1075 | #define HARD_REGNO_CALL_PART_CLOBBERED(REGNO, MODE) \ | |
1076 | (SSE_REGNO_P (REGNO) && GET_MODE_SIZE (MODE) > 16) | |
1077 | ||
c98f8742 JVA |
1078 | /* Specify the registers used for certain standard purposes. |
1079 | The values of these macros are register numbers. */ | |
1080 | ||
1081 | /* on the 386 the pc register is %eip, and is not usable as a general | |
1082 | register. The ordinary mov instructions won't work */ | |
1083 | /* #define PC_REGNUM */ | |
1084 | ||
1085 | /* Register to use for pushing function arguments. */ | |
1086 | #define STACK_POINTER_REGNUM 7 | |
1087 | ||
1088 | /* Base register for access to local variables of the function. */ | |
564d80f4 JH |
1089 | #define HARD_FRAME_POINTER_REGNUM 6 |
1090 | ||
1091 | /* Base register for access to local variables of the function. */ | |
b0d95de8 | 1092 | #define FRAME_POINTER_REGNUM 20 |
c98f8742 JVA |
1093 | |
1094 | /* First floating point reg */ | |
1095 | #define FIRST_FLOAT_REG 8 | |
1096 | ||
1097 | /* First & last stack-like regs */ | |
1098 | #define FIRST_STACK_REG FIRST_FLOAT_REG | |
1099 | #define LAST_STACK_REG (FIRST_FLOAT_REG + 7) | |
1100 | ||
a7180f70 BS |
1101 | #define FIRST_SSE_REG (FRAME_POINTER_REGNUM + 1) |
1102 | #define LAST_SSE_REG (FIRST_SSE_REG + 7) | |
fce5a9f2 | 1103 | |
a7180f70 BS |
1104 | #define FIRST_MMX_REG (LAST_SSE_REG + 1) |
1105 | #define LAST_MMX_REG (FIRST_MMX_REG + 7) | |
1106 | ||
3f3f2124 JH |
1107 | #define FIRST_REX_INT_REG (LAST_MMX_REG + 1) |
1108 | #define LAST_REX_INT_REG (FIRST_REX_INT_REG + 7) | |
1109 | ||
1110 | #define FIRST_REX_SSE_REG (LAST_REX_INT_REG + 1) | |
1111 | #define LAST_REX_SSE_REG (FIRST_REX_SSE_REG + 7) | |
1112 | ||
aabcd309 | 1113 | /* Override this in other tm.h files to cope with various OS lossage |
6fca22eb RH |
1114 | requiring a frame pointer. */ |
1115 | #ifndef SUBTARGET_FRAME_POINTER_REQUIRED | |
1116 | #define SUBTARGET_FRAME_POINTER_REQUIRED 0 | |
1117 | #endif | |
1118 | ||
1119 | /* Make sure we can access arbitrary call frames. */ | |
1120 | #define SETUP_FRAME_ADDRESSES() ix86_setup_frame_addresses () | |
c98f8742 JVA |
1121 | |
1122 | /* Base register for access to arguments of the function. */ | |
1123 | #define ARG_POINTER_REGNUM 16 | |
1124 | ||
c98f8742 | 1125 | /* Register to hold the addressing base for position independent |
5b43fed1 RH |
1126 | code access to data items. We don't use PIC pointer for 64bit |
1127 | mode. Define the regnum to dummy value to prevent gcc from | |
fce5a9f2 | 1128 | pessimizing code dealing with EBX. |
bd09bdeb RH |
1129 | |
1130 | To avoid clobbering a call-saved register unnecessarily, we renumber | |
1131 | the pic register when possible. The change is visible after the | |
1132 | prologue has been emitted. */ | |
1133 | ||
2e3f842f | 1134 | #define REAL_PIC_OFFSET_TABLE_REGNUM BX_REG |
bd09bdeb RH |
1135 | |
1136 | #define PIC_OFFSET_TABLE_REGNUM \ | |
7dcbf659 JH |
1137 | ((TARGET_64BIT && ix86_cmodel == CM_SMALL_PIC) \ |
1138 | || !flag_pic ? INVALID_REGNUM \ | |
bd09bdeb RH |
1139 | : reload_completed ? REGNO (pic_offset_table_rtx) \ |
1140 | : REAL_PIC_OFFSET_TABLE_REGNUM) | |
c98f8742 | 1141 | |
5fc0e5df KW |
1142 | #define GOT_SYMBOL_NAME "_GLOBAL_OFFSET_TABLE_" |
1143 | ||
c51e6d85 | 1144 | /* This is overridden by <cygwin.h>. */ |
5e062767 DS |
1145 | #define MS_AGGREGATE_RETURN 0 |
1146 | ||
61fec9ff JB |
1147 | /* This is overridden by <netware.h>. */ |
1148 | #define KEEP_AGGREGATE_RETURN_POINTER 0 | |
c98f8742 JVA |
1149 | \f |
1150 | /* Define the classes of registers for register constraints in the | |
1151 | machine description. Also define ranges of constants. | |
1152 | ||
1153 | One of the classes must always be named ALL_REGS and include all hard regs. | |
1154 | If there is more than one class, another class must be named NO_REGS | |
1155 | and contain no registers. | |
1156 | ||
1157 | The name GENERAL_REGS must be the name of a class (or an alias for | |
1158 | another name such as ALL_REGS). This is the class of registers | |
1159 | that is allowed by "g" or "r" in a register constraint. | |
1160 | Also, registers outside this class are allocated only when | |
1161 | instructions express preferences for them. | |
1162 | ||
1163 | The classes must be numbered in nondecreasing order; that is, | |
1164 | a larger-numbered class must never be contained completely | |
1165 | in a smaller-numbered class. | |
1166 | ||
1167 | For any two classes, it is very desirable that there be another | |
ab408a86 JVA |
1168 | class that represents their union. |
1169 | ||
1170 | It might seem that class BREG is unnecessary, since no useful 386 | |
1171 | opcode needs reg %ebx. But some systems pass args to the OS in ebx, | |
e075ae69 RH |
1172 | and the "b" register constraint is useful in asms for syscalls. |
1173 | ||
03c259ad | 1174 | The flags, fpsr and fpcr registers are in no class. */ |
c98f8742 JVA |
1175 | |
1176 | enum reg_class | |
1177 | { | |
1178 | NO_REGS, | |
e075ae69 | 1179 | AREG, DREG, CREG, BREG, SIREG, DIREG, |
4b71cd6e | 1180 | AD_REGS, /* %eax/%edx for DImode */ |
ac2e563f | 1181 | CLOBBERED_REGS, /* call-clobbered integers */ |
c98f8742 | 1182 | Q_REGS, /* %eax %ebx %ecx %edx */ |
564d80f4 | 1183 | NON_Q_REGS, /* %esi %edi %ebp %esp */ |
c98f8742 | 1184 | INDEX_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp */ |
3f3f2124 | 1185 | LEGACY_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp */ |
63001560 UB |
1186 | GENERAL_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp |
1187 | %r8 %r9 %r10 %r11 %r12 %r13 %r14 %r15 */ | |
c98f8742 JVA |
1188 | FP_TOP_REG, FP_SECOND_REG, /* %st(0) %st(1) */ |
1189 | FLOAT_REGS, | |
06f4e35d | 1190 | SSE_FIRST_REG, |
a7180f70 BS |
1191 | SSE_REGS, |
1192 | MMX_REGS, | |
446988df JH |
1193 | FP_TOP_SSE_REGS, |
1194 | FP_SECOND_SSE_REGS, | |
1195 | FLOAT_SSE_REGS, | |
1196 | FLOAT_INT_REGS, | |
1197 | INT_SSE_REGS, | |
1198 | FLOAT_INT_SSE_REGS, | |
c98f8742 JVA |
1199 | ALL_REGS, LIM_REG_CLASSES |
1200 | }; | |
1201 | ||
d9a5f180 GS |
1202 | #define N_REG_CLASSES ((int) LIM_REG_CLASSES) |
1203 | ||
1204 | #define INTEGER_CLASS_P(CLASS) \ | |
1205 | reg_class_subset_p ((CLASS), GENERAL_REGS) | |
1206 | #define FLOAT_CLASS_P(CLASS) \ | |
1207 | reg_class_subset_p ((CLASS), FLOAT_REGS) | |
1208 | #define SSE_CLASS_P(CLASS) \ | |
06f4e35d | 1209 | reg_class_subset_p ((CLASS), SSE_REGS) |
d9a5f180 | 1210 | #define MMX_CLASS_P(CLASS) \ |
f75959a6 | 1211 | ((CLASS) == MMX_REGS) |
d9a5f180 GS |
1212 | #define MAYBE_INTEGER_CLASS_P(CLASS) \ |
1213 | reg_classes_intersect_p ((CLASS), GENERAL_REGS) | |
1214 | #define MAYBE_FLOAT_CLASS_P(CLASS) \ | |
1215 | reg_classes_intersect_p ((CLASS), FLOAT_REGS) | |
1216 | #define MAYBE_SSE_CLASS_P(CLASS) \ | |
1217 | reg_classes_intersect_p (SSE_REGS, (CLASS)) | |
1218 | #define MAYBE_MMX_CLASS_P(CLASS) \ | |
1219 | reg_classes_intersect_p (MMX_REGS, (CLASS)) | |
1220 | ||
1221 | #define Q_CLASS_P(CLASS) \ | |
1222 | reg_class_subset_p ((CLASS), Q_REGS) | |
7c6b971d | 1223 | |
43f3a59d | 1224 | /* Give names of register classes as strings for dump file. */ |
c98f8742 JVA |
1225 | |
1226 | #define REG_CLASS_NAMES \ | |
1227 | { "NO_REGS", \ | |
ab408a86 | 1228 | "AREG", "DREG", "CREG", "BREG", \ |
c98f8742 | 1229 | "SIREG", "DIREG", \ |
e075ae69 | 1230 | "AD_REGS", \ |
ac2e563f | 1231 | "CLOBBERED_REGS", \ |
e075ae69 | 1232 | "Q_REGS", "NON_Q_REGS", \ |
c98f8742 | 1233 | "INDEX_REGS", \ |
3f3f2124 | 1234 | "LEGACY_REGS", \ |
c98f8742 JVA |
1235 | "GENERAL_REGS", \ |
1236 | "FP_TOP_REG", "FP_SECOND_REG", \ | |
1237 | "FLOAT_REGS", \ | |
cb482895 | 1238 | "SSE_FIRST_REG", \ |
a7180f70 BS |
1239 | "SSE_REGS", \ |
1240 | "MMX_REGS", \ | |
446988df JH |
1241 | "FP_TOP_SSE_REGS", \ |
1242 | "FP_SECOND_SSE_REGS", \ | |
1243 | "FLOAT_SSE_REGS", \ | |
8fcaaa80 | 1244 | "FLOAT_INT_REGS", \ |
446988df JH |
1245 | "INT_SSE_REGS", \ |
1246 | "FLOAT_INT_SSE_REGS", \ | |
c98f8742 JVA |
1247 | "ALL_REGS" } |
1248 | ||
ac2e563f RH |
1249 | /* Define which registers fit in which classes. This is an initializer |
1250 | for a vector of HARD_REG_SET of length N_REG_CLASSES. | |
1251 | ||
1252 | Note that the default setting of CLOBBERED_REGS is for 32-bit; this | |
1253 | is adjusted by CONDITIONAL_REGISTER_USAGE for the 64-bit ABI in effect. */ | |
c98f8742 | 1254 | |
a7180f70 | 1255 | #define REG_CLASS_CONTENTS \ |
3f3f2124 JH |
1256 | { { 0x00, 0x0 }, \ |
1257 | { 0x01, 0x0 }, { 0x02, 0x0 }, /* AREG, DREG */ \ | |
1258 | { 0x04, 0x0 }, { 0x08, 0x0 }, /* CREG, BREG */ \ | |
1259 | { 0x10, 0x0 }, { 0x20, 0x0 }, /* SIREG, DIREG */ \ | |
1260 | { 0x03, 0x0 }, /* AD_REGS */ \ | |
ac2e563f | 1261 | { 0x07, 0x0 }, /* CLOBBERED_REGS */ \ |
3f3f2124 | 1262 | { 0x0f, 0x0 }, /* Q_REGS */ \ |
b0d95de8 UB |
1263 | { 0x1100f0, 0x1fe0 }, /* NON_Q_REGS */ \ |
1264 | { 0x7f, 0x1fe0 }, /* INDEX_REGS */ \ | |
1265 | { 0x1100ff, 0x0 }, /* LEGACY_REGS */ \ | |
1266 | { 0x1100ff, 0x1fe0 }, /* GENERAL_REGS */ \ | |
3f3f2124 JH |
1267 | { 0x100, 0x0 }, { 0x0200, 0x0 },/* FP_TOP_REG, FP_SECOND_REG */\ |
1268 | { 0xff00, 0x0 }, /* FLOAT_REGS */ \ | |
cb482895 | 1269 | { 0x200000, 0x0 }, /* SSE_FIRST_REG */ \ |
b0d95de8 UB |
1270 | { 0x1fe00000,0x1fe000 }, /* SSE_REGS */ \ |
1271 | { 0xe0000000, 0x1f }, /* MMX_REGS */ \ | |
1272 | { 0x1fe00100,0x1fe000 }, /* FP_TOP_SSE_REG */ \ | |
1273 | { 0x1fe00200,0x1fe000 }, /* FP_SECOND_SSE_REG */ \ | |
1274 | { 0x1fe0ff00,0x3fe000 }, /* FLOAT_SSE_REGS */ \ | |
1275 | { 0x1ffff, 0x1fe0 }, /* FLOAT_INT_REGS */ \ | |
1276 | { 0x1fe100ff,0x1fffe0 }, /* INT_SSE_REGS */ \ | |
1277 | { 0x1fe1ffff,0x1fffe0 }, /* FLOAT_INT_SSE_REGS */ \ | |
1278 | { 0xffffffff,0x1fffff } \ | |
e075ae69 | 1279 | } |
c98f8742 JVA |
1280 | |
1281 | /* The same information, inverted: | |
1282 | Return the class number of the smallest class containing | |
1283 | reg number REGNO. This could be a conditional expression | |
1284 | or could index an array. */ | |
1285 | ||
c98f8742 JVA |
1286 | #define REGNO_REG_CLASS(REGNO) (regclass_map[REGNO]) |
1287 | ||
42db504c SB |
1288 | /* When this hook returns true for MODE, the compiler allows |
1289 | registers explicitly used in the rtl to be used as spill registers | |
1290 | but prevents the compiler from extending the lifetime of these | |
1291 | registers. */ | |
1292 | #define TARGET_SMALL_REGISTER_CLASSES_FOR_MODE_P hook_bool_mode_true | |
c98f8742 | 1293 | |
6c6094f1 | 1294 | #define QI_REG_P(X) (REG_P (X) && REGNO (X) <= BX_REG) |
3f3f2124 | 1295 | |
d9a5f180 | 1296 | #define GENERAL_REGNO_P(N) \ |
fb84c7a0 | 1297 | ((N) <= STACK_POINTER_REGNUM || REX_INT_REGNO_P (N)) |
3f3f2124 JH |
1298 | |
1299 | #define GENERAL_REG_P(X) \ | |
6189a572 | 1300 | (REG_P (X) && GENERAL_REGNO_P (REGNO (X))) |
3f3f2124 JH |
1301 | |
1302 | #define ANY_QI_REG_P(X) (TARGET_64BIT ? GENERAL_REG_P(X) : QI_REG_P (X)) | |
1303 | ||
fb84c7a0 UB |
1304 | #define REX_INT_REGNO_P(N) \ |
1305 | IN_RANGE ((N), FIRST_REX_INT_REG, LAST_REX_INT_REG) | |
3f3f2124 JH |
1306 | #define REX_INT_REG_P(X) (REG_P (X) && REX_INT_REGNO_P (REGNO (X))) |
1307 | ||
c98f8742 | 1308 | #define FP_REG_P(X) (REG_P (X) && FP_REGNO_P (REGNO (X))) |
fb84c7a0 | 1309 | #define FP_REGNO_P(N) IN_RANGE ((N), FIRST_STACK_REG, LAST_STACK_REG) |
446988df | 1310 | #define ANY_FP_REG_P(X) (REG_P (X) && ANY_FP_REGNO_P (REGNO (X))) |
d9a5f180 | 1311 | #define ANY_FP_REGNO_P(N) (FP_REGNO_P (N) || SSE_REGNO_P (N)) |
a7180f70 | 1312 | |
54a88090 | 1313 | #define X87_FLOAT_MODE_P(MODE) \ |
27ac40e2 | 1314 | (TARGET_80387 && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) |
54a88090 | 1315 | |
fb84c7a0 UB |
1316 | #define SSE_REG_P(N) (REG_P (N) && SSE_REGNO_P (REGNO (N))) |
1317 | #define SSE_REGNO_P(N) \ | |
1318 | (IN_RANGE ((N), FIRST_SSE_REG, LAST_SSE_REG) \ | |
1319 | || REX_SSE_REGNO_P (N)) | |
3f3f2124 | 1320 | |
4977bab6 | 1321 | #define REX_SSE_REGNO_P(N) \ |
fb84c7a0 | 1322 | IN_RANGE ((N), FIRST_REX_SSE_REG, LAST_REX_SSE_REG) |
4977bab6 | 1323 | |
d9a5f180 GS |
1324 | #define SSE_REGNO(N) \ |
1325 | ((N) < 8 ? FIRST_SSE_REG + (N) : FIRST_REX_SSE_REG + (N) - 8) | |
446988df | 1326 | |
d9a5f180 | 1327 | #define SSE_FLOAT_MODE_P(MODE) \ |
91da27c5 | 1328 | ((TARGET_SSE && (MODE) == SFmode) || (TARGET_SSE2 && (MODE) == DFmode)) |
a7180f70 | 1329 | |
d6023b50 UB |
1330 | #define SSE_VEC_FLOAT_MODE_P(MODE) \ |
1331 | ((TARGET_SSE && (MODE) == V4SFmode) || (TARGET_SSE2 && (MODE) == V2DFmode)) | |
1332 | ||
95879c72 L |
1333 | #define AVX_FLOAT_MODE_P(MODE) \ |
1334 | (TARGET_AVX && ((MODE) == SFmode || (MODE) == DFmode)) | |
1335 | ||
1336 | #define AVX128_VEC_FLOAT_MODE_P(MODE) \ | |
1337 | (TARGET_AVX && ((MODE) == V4SFmode || (MODE) == V2DFmode)) | |
1338 | ||
1339 | #define AVX256_VEC_FLOAT_MODE_P(MODE) \ | |
1340 | (TARGET_AVX && ((MODE) == V8SFmode || (MODE) == V4DFmode)) | |
1341 | ||
1342 | #define AVX_VEC_FLOAT_MODE_P(MODE) \ | |
1343 | (TARGET_AVX && ((MODE) == V4SFmode || (MODE) == V2DFmode \ | |
1344 | || (MODE) == V8SFmode || (MODE) == V4DFmode)) | |
1345 | ||
cbf2e4d4 HJ |
1346 | #define FMA4_VEC_FLOAT_MODE_P(MODE) \ |
1347 | (TARGET_FMA4 && ((MODE) == V4SFmode || (MODE) == V2DFmode \ | |
1348 | || (MODE) == V8SFmode || (MODE) == V4DFmode)) | |
1349 | ||
d9a5f180 | 1350 | #define MMX_REG_P(XOP) (REG_P (XOP) && MMX_REGNO_P (REGNO (XOP))) |
fb84c7a0 | 1351 | #define MMX_REGNO_P(N) IN_RANGE ((N), FIRST_MMX_REG, LAST_MMX_REG) |
fce5a9f2 | 1352 | |
fb84c7a0 | 1353 | #define STACK_REG_P(XOP) (REG_P (XOP) && STACK_REGNO_P (REGNO (XOP))) |
fb84c7a0 | 1354 | #define STACK_REGNO_P(N) IN_RANGE ((N), FIRST_STACK_REG, LAST_STACK_REG) |
c98f8742 | 1355 | |
d9a5f180 | 1356 | #define STACK_TOP_P(XOP) (REG_P (XOP) && REGNO (XOP) == FIRST_STACK_REG) |
c98f8742 | 1357 | |
e075ae69 RH |
1358 | #define CC_REG_P(X) (REG_P (X) && CC_REGNO_P (REGNO (X))) |
1359 | #define CC_REGNO_P(X) ((X) == FLAGS_REG || (X) == FPSR_REG) | |
1360 | ||
c98f8742 JVA |
1361 | /* The class value for index registers, and the one for base regs. */ |
1362 | ||
1363 | #define INDEX_REG_CLASS INDEX_REGS | |
1364 | #define BASE_REG_CLASS GENERAL_REGS | |
1365 | ||
c98f8742 | 1366 | /* Place additional restrictions on the register class to use when it |
4cbb525c | 1367 | is necessary to be able to hold a value of mode MODE in a reload |
892a2d68 | 1368 | register for which class CLASS would ordinarily be used. */ |
c98f8742 | 1369 | |
d2836273 JH |
1370 | #define LIMIT_RELOAD_CLASS(MODE, CLASS) \ |
1371 | ((MODE) == QImode && !TARGET_64BIT \ | |
3b8d200e JJ |
1372 | && ((CLASS) == ALL_REGS || (CLASS) == GENERAL_REGS \ |
1373 | || (CLASS) == LEGACY_REGS || (CLASS) == INDEX_REGS) \ | |
c98f8742 JVA |
1374 | ? Q_REGS : (CLASS)) |
1375 | ||
85ff473e | 1376 | /* If we are copying between general and FP registers, we need a memory |
f84aa48a | 1377 | location. The same is true for SSE and MMX registers. */ |
d9a5f180 GS |
1378 | #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, MODE) \ |
1379 | ix86_secondary_memory_needed ((CLASS1), (CLASS2), (MODE), 1) | |
e075ae69 | 1380 | |
c62b3659 UB |
1381 | /* Get_secondary_mem widens integral modes to BITS_PER_WORD. |
1382 | There is no need to emit full 64 bit move on 64 bit targets | |
1383 | for integral modes that can be moved using 32 bit move. */ | |
1384 | #define SECONDARY_MEMORY_NEEDED_MODE(MODE) \ | |
1385 | (GET_MODE_BITSIZE (MODE) < 32 && INTEGRAL_MODE_P (MODE) \ | |
1386 | ? mode_for_size (32, GET_MODE_CLASS (MODE), 0) \ | |
1387 | : MODE) | |
1388 | ||
c98f8742 JVA |
1389 | /* Return the maximum number of consecutive registers |
1390 | needed to represent mode MODE in a register of class CLASS. */ | |
1391 | /* On the 80386, this is the size of MODE in words, | |
f8a1ebc6 | 1392 | except in the FP regs, where a single reg is always enough. */ |
a7180f70 | 1393 | #define CLASS_MAX_NREGS(CLASS, MODE) \ |
63001560 UB |
1394 | (MAYBE_INTEGER_CLASS_P (CLASS) \ |
1395 | ? ((MODE) == XFmode \ | |
1396 | ? (TARGET_64BIT ? 2 : 3) \ | |
1397 | : (MODE) == XCmode \ | |
1398 | ? (TARGET_64BIT ? 4 : 6) \ | |
1399 | : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) \ | |
1400 | : (COMPLEX_MODE_P (MODE) ? 2 : 1)) | |
f5316dfe | 1401 | |
1272914c RH |
1402 | /* Return a class of registers that cannot change FROM mode to TO mode. */ |
1403 | ||
1404 | #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ | |
1405 | ix86_cannot_change_mode_class (FROM, TO, CLASS) | |
c98f8742 JVA |
1406 | \f |
1407 | /* Stack layout; function entry, exit and calling. */ | |
1408 | ||
1409 | /* Define this if pushing a word on the stack | |
1410 | makes the stack pointer a smaller address. */ | |
1411 | #define STACK_GROWS_DOWNWARD | |
1412 | ||
a4d05547 | 1413 | /* Define this to nonzero if the nominal address of the stack frame |
c98f8742 JVA |
1414 | is at the high-address end of the local variables; |
1415 | that is, each additional local variable allocated | |
1416 | goes at a more negative offset in the frame. */ | |
f62c8a5c | 1417 | #define FRAME_GROWS_DOWNWARD 1 |
c98f8742 JVA |
1418 | |
1419 | /* Offset within stack frame to start allocating local variables at. | |
1420 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
1421 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
1422 | of the first local allocated. */ | |
1423 | #define STARTING_FRAME_OFFSET 0 | |
1424 | ||
8c2b2fae UB |
1425 | /* If we generate an insn to push BYTES bytes, this says how many the stack |
1426 | pointer really advances by. On 386, we have pushw instruction that | |
1427 | decrements by exactly 2 no matter what the position was, there is no pushb. | |
1428 | ||
1429 | But as CIE data alignment factor on this arch is -4 for 32bit targets | |
1430 | and -8 for 64bit targets, we need to make sure all stack pointer adjustments | |
1431 | are in multiple of 4 for 32bit targets and 8 for 64bit targets. */ | |
c98f8742 | 1432 | |
d2836273 | 1433 | #define PUSH_ROUNDING(BYTES) \ |
8c2b2fae UB |
1434 | (((BYTES) + UNITS_PER_WORD - 1) & -UNITS_PER_WORD) |
1435 | ||
1436 | /* If defined, the maximum amount of space required for outgoing arguments | |
1437 | will be computed and placed into the variable `crtl->outgoing_args_size'. | |
1438 | No space will be pushed onto the stack for each call; instead, the | |
1439 | function prologue should increase the stack frame size by this amount. | |
9aa5c1b2 JH |
1440 | |
1441 | MS ABI seem to require 16 byte alignment everywhere except for function | |
1442 | prologue and apilogue. This is not possible without | |
1443 | ACCUMULATE_OUTGOING_ARGS. */ | |
f73ad30e | 1444 | |
6c6094f1 UB |
1445 | #define ACCUMULATE_OUTGOING_ARGS \ |
1446 | (TARGET_ACCUMULATE_OUTGOING_ARGS || ix86_cfun_abi () == MS_ABI) | |
f73ad30e JH |
1447 | |
1448 | /* If defined, a C expression whose value is nonzero when we want to use PUSH | |
1449 | instructions to pass outgoing arguments. */ | |
1450 | ||
1451 | #define PUSH_ARGS (TARGET_PUSH_ARGS && !ACCUMULATE_OUTGOING_ARGS) | |
1452 | ||
2da4124d L |
1453 | /* We want the stack and args grow in opposite directions, even if |
1454 | PUSH_ARGS is 0. */ | |
1455 | #define PUSH_ARGS_REVERSED 1 | |
1456 | ||
c98f8742 JVA |
1457 | /* Offset of first parameter from the argument pointer register value. */ |
1458 | #define FIRST_PARM_OFFSET(FNDECL) 0 | |
1459 | ||
a7180f70 BS |
1460 | /* Define this macro if functions should assume that stack space has been |
1461 | allocated for arguments even when their values are passed in registers. | |
1462 | ||
1463 | The value of this macro is the size, in bytes, of the area reserved for | |
1464 | arguments passed in registers for the function represented by FNDECL. | |
1465 | ||
1466 | This space can be allocated by the caller, or be a part of the | |
1467 | machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says | |
1468 | which. */ | |
7c800926 KT |
1469 | #define REG_PARM_STACK_SPACE(FNDECL) ix86_reg_parm_stack_space (FNDECL) |
1470 | ||
4ae8027b UB |
1471 | #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) \ |
1472 | (ix86_function_type_abi (FNTYPE) == MS_ABI) | |
7c800926 | 1473 | |
c98f8742 JVA |
1474 | /* Define how to find the value returned by a library function |
1475 | assuming the value has mode MODE. */ | |
1476 | ||
4ae8027b | 1477 | #define LIBCALL_VALUE(MODE) ix86_libcall_value (MODE) |
c98f8742 | 1478 | |
e9125c09 TW |
1479 | /* Define the size of the result block used for communication between |
1480 | untyped_call and untyped_return. The block contains a DImode value | |
1481 | followed by the block used by fnsave and frstor. */ | |
1482 | ||
1483 | #define APPLY_RESULT_SIZE (8+108) | |
1484 | ||
b08de47e | 1485 | /* 1 if N is a possible register number for function argument passing. */ |
53c17031 | 1486 | #define FUNCTION_ARG_REGNO_P(N) ix86_function_arg_regno_p (N) |
c98f8742 JVA |
1487 | |
1488 | /* Define a data type for recording info about an argument list | |
1489 | during the scan of that argument list. This data type should | |
1490 | hold all necessary information about the function itself | |
1491 | and about the args processed so far, enough to enable macros | |
b08de47e | 1492 | such as FUNCTION_ARG to determine where the next arg should go. */ |
c98f8742 | 1493 | |
e075ae69 | 1494 | typedef struct ix86_args { |
fa283935 | 1495 | int words; /* # words passed so far */ |
b08de47e MM |
1496 | int nregs; /* # registers available for passing */ |
1497 | int regno; /* next available register number */ | |
3e65f251 KT |
1498 | int fastcall; /* fastcall or thiscall calling convention |
1499 | is used */ | |
fa283935 | 1500 | int sse_words; /* # sse words passed so far */ |
a7180f70 | 1501 | int sse_nregs; /* # sse registers available for passing */ |
95879c72 | 1502 | int warn_avx; /* True when we want to warn about AVX ABI. */ |
47a37ce4 | 1503 | int warn_sse; /* True when we want to warn about SSE ABI. */ |
fa283935 UB |
1504 | int warn_mmx; /* True when we want to warn about MMX ABI. */ |
1505 | int sse_regno; /* next available sse register number */ | |
1506 | int mmx_words; /* # mmx words passed so far */ | |
bcf17554 JH |
1507 | int mmx_nregs; /* # mmx registers available for passing */ |
1508 | int mmx_regno; /* next available mmx register number */ | |
892a2d68 | 1509 | int maybe_vaarg; /* true for calls to possibly vardic fncts. */ |
2767a7f2 | 1510 | int caller; /* true if it is caller. */ |
2824d6e5 UB |
1511 | int float_in_sse; /* Set to 1 or 2 for 32bit targets if |
1512 | SFmode/DFmode arguments should be passed | |
1513 | in SSE registers. Otherwise 0. */ | |
51212b32 | 1514 | enum calling_abi call_abi; /* Set to SYSV_ABI for sysv abi. Otherwise |
7c800926 | 1515 | MS_ABI for ms abi. */ |
b08de47e | 1516 | } CUMULATIVE_ARGS; |
c98f8742 JVA |
1517 | |
1518 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
1519 | for a call to a function whose data type is FNTYPE. | |
b08de47e | 1520 | For a library call, FNTYPE is 0. */ |
c98f8742 | 1521 | |
0f6937fe | 1522 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ |
2767a7f2 L |
1523 | init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (FNDECL), \ |
1524 | (N_NAMED_ARGS) != -1) | |
c98f8742 | 1525 | |
c98f8742 JVA |
1526 | /* Output assembler code to FILE to increment profiler label # LABELNO |
1527 | for profiling a function entry. */ | |
1528 | ||
a5fa1ecd JH |
1529 | #define FUNCTION_PROFILER(FILE, LABELNO) x86_function_profiler (FILE, LABELNO) |
1530 | ||
1531 | #define MCOUNT_NAME "_mcount" | |
1532 | ||
3c5273a9 KT |
1533 | #define MCOUNT_NAME_BEFORE_PROLOGUE "__fentry__" |
1534 | ||
a5fa1ecd | 1535 | #define PROFILE_COUNT_REGISTER "edx" |
c98f8742 JVA |
1536 | |
1537 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
1538 | the stack pointer does not matter. The value is tested only in | |
1539 | functions that have frame pointers. | |
1540 | No definition is equivalent to always zero. */ | |
fce5a9f2 | 1541 | /* Note on the 386 it might be more efficient not to define this since |
c98f8742 JVA |
1542 | we have to restore it ourselves from the frame pointer, in order to |
1543 | use pop */ | |
1544 | ||
1545 | #define EXIT_IGNORE_STACK 1 | |
1546 | ||
c98f8742 JVA |
1547 | /* Output assembler code for a block containing the constant parts |
1548 | of a trampoline, leaving space for the variable parts. */ | |
1549 | ||
a269a03c | 1550 | /* On the 386, the trampoline contains two instructions: |
c98f8742 | 1551 | mov #STATIC,ecx |
a269a03c JC |
1552 | jmp FUNCTION |
1553 | The trampoline is generated entirely at runtime. The operand of JMP | |
1554 | is the address of FUNCTION relative to the instruction following the | |
1555 | JMP (which is 5 bytes long). */ | |
c98f8742 JVA |
1556 | |
1557 | /* Length in units of the trampoline for entering a nested function. */ | |
1558 | ||
3452586b | 1559 | #define TRAMPOLINE_SIZE (TARGET_64BIT ? 24 : 10) |
c98f8742 JVA |
1560 | \f |
1561 | /* Definitions for register eliminations. | |
1562 | ||
1563 | This is an array of structures. Each structure initializes one pair | |
1564 | of eliminable registers. The "from" register number is given first, | |
1565 | followed by "to". Eliminations of the same "from" register are listed | |
1566 | in order of preference. | |
1567 | ||
afc2cd05 NC |
1568 | There are two registers that can always be eliminated on the i386. |
1569 | The frame pointer and the arg pointer can be replaced by either the | |
1570 | hard frame pointer or to the stack pointer, depending upon the | |
1571 | circumstances. The hard frame pointer is not used before reload and | |
1572 | so it is not eligible for elimination. */ | |
c98f8742 | 1573 | |
564d80f4 JH |
1574 | #define ELIMINABLE_REGS \ |
1575 | {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1576 | { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
1577 | { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1578 | { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} \ | |
c98f8742 | 1579 | |
c98f8742 JVA |
1580 | /* Define the offset between two registers, one to be eliminated, and the other |
1581 | its replacement, at the start of a routine. */ | |
1582 | ||
d9a5f180 GS |
1583 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
1584 | ((OFFSET) = ix86_initial_elimination_offset ((FROM), (TO))) | |
c98f8742 JVA |
1585 | \f |
1586 | /* Addressing modes, and classification of registers for them. */ | |
1587 | ||
c98f8742 JVA |
1588 | /* Macros to check register numbers against specific register classes. */ |
1589 | ||
1590 | /* These assume that REGNO is a hard or pseudo reg number. | |
1591 | They give nonzero only if REGNO is a hard reg of the suitable class | |
1592 | or a pseudo reg currently allocated to a suitable hard reg. | |
1593 | Since they use reg_renumber, they are safe only once reg_renumber | |
1594 | has been allocated, which happens in local-alloc.c. */ | |
1595 | ||
3f3f2124 JH |
1596 | #define REGNO_OK_FOR_INDEX_P(REGNO) \ |
1597 | ((REGNO) < STACK_POINTER_REGNUM \ | |
fb84c7a0 UB |
1598 | || REX_INT_REGNO_P (REGNO) \ |
1599 | || (unsigned) reg_renumber[(REGNO)] < STACK_POINTER_REGNUM \ | |
1600 | || REX_INT_REGNO_P ((unsigned) reg_renumber[(REGNO)])) | |
c98f8742 | 1601 | |
3f3f2124 | 1602 | #define REGNO_OK_FOR_BASE_P(REGNO) \ |
fb84c7a0 | 1603 | (GENERAL_REGNO_P (REGNO) \ |
3f3f2124 JH |
1604 | || (REGNO) == ARG_POINTER_REGNUM \ |
1605 | || (REGNO) == FRAME_POINTER_REGNUM \ | |
fb84c7a0 | 1606 | || GENERAL_REGNO_P ((unsigned) reg_renumber[(REGNO)])) |
c98f8742 | 1607 | |
c98f8742 JVA |
1608 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx |
1609 | and check its validity for a certain class. | |
1610 | We have two alternate definitions for each of them. | |
1611 | The usual definition accepts all pseudo regs; the other rejects | |
1612 | them unless they have been allocated suitable hard regs. | |
1613 | The symbol REG_OK_STRICT causes the latter definition to be used. | |
1614 | ||
1615 | Most source files want to accept pseudo regs in the hope that | |
1616 | they will get allocated to the class that the insn wants them to be in. | |
1617 | Source files for reload pass need to be strict. | |
1618 | After reload, it makes no difference, since pseudo regs have | |
1619 | been eliminated by then. */ | |
1620 | ||
c98f8742 | 1621 | |
ff482c8d | 1622 | /* Non strict versions, pseudos are ok. */ |
3b3c6a3f MM |
1623 | #define REG_OK_FOR_INDEX_NONSTRICT_P(X) \ |
1624 | (REGNO (X) < STACK_POINTER_REGNUM \ | |
fb84c7a0 | 1625 | || REX_INT_REGNO_P (REGNO (X)) \ |
c98f8742 JVA |
1626 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
1627 | ||
3b3c6a3f | 1628 | #define REG_OK_FOR_BASE_NONSTRICT_P(X) \ |
fb84c7a0 | 1629 | (GENERAL_REGNO_P (REGNO (X)) \ |
3b3c6a3f | 1630 | || REGNO (X) == ARG_POINTER_REGNUM \ |
3f3f2124 | 1631 | || REGNO (X) == FRAME_POINTER_REGNUM \ |
3b3c6a3f | 1632 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
c98f8742 | 1633 | |
3b3c6a3f MM |
1634 | /* Strict versions, hard registers only */ |
1635 | #define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
1636 | #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
c98f8742 | 1637 | |
3b3c6a3f | 1638 | #ifndef REG_OK_STRICT |
d9a5f180 GS |
1639 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P (X) |
1640 | #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P (X) | |
3b3c6a3f MM |
1641 | |
1642 | #else | |
d9a5f180 GS |
1643 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P (X) |
1644 | #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P (X) | |
c98f8742 JVA |
1645 | #endif |
1646 | ||
331d9186 | 1647 | /* TARGET_LEGITIMATE_ADDRESS_P recognizes an RTL expression |
c98f8742 JVA |
1648 | that is a valid memory address for an instruction. |
1649 | The MODE argument is the machine mode for the MEM expression | |
1650 | that wants to use this address. | |
1651 | ||
331d9186 | 1652 | The other macros defined here are used only in TARGET_LEGITIMATE_ADDRESS_P, |
c98f8742 JVA |
1653 | except for CONSTANT_ADDRESS_P which is usually machine-independent. |
1654 | ||
1655 | See legitimize_pic_address in i386.c for details as to what | |
1656 | constitutes a legitimate address when -fpic is used. */ | |
1657 | ||
1658 | #define MAX_REGS_PER_ADDRESS 2 | |
1659 | ||
f996902d | 1660 | #define CONSTANT_ADDRESS_P(X) constant_address_p (X) |
c98f8742 JVA |
1661 | |
1662 | /* Nonzero if the constant value X is a legitimate general operand. | |
1663 | It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ | |
1664 | ||
f996902d | 1665 | #define LEGITIMATE_CONSTANT_P(X) legitimate_constant_p (X) |
c98f8742 | 1666 | |
b949ea8b JW |
1667 | /* If defined, a C expression to determine the base term of address X. |
1668 | This macro is used in only one place: `find_base_term' in alias.c. | |
1669 | ||
1670 | It is always safe for this macro to not be defined. It exists so | |
1671 | that alias analysis can understand machine-dependent addresses. | |
1672 | ||
1673 | The typical use of this macro is to handle addresses containing | |
1674 | a label_ref or symbol_ref within an UNSPEC. */ | |
1675 | ||
d9a5f180 | 1676 | #define FIND_BASE_TERM(X) ix86_find_base_term (X) |
b949ea8b | 1677 | |
c98f8742 | 1678 | /* Nonzero if the constant value X is a legitimate general operand |
fce5a9f2 | 1679 | when generating PIC code. It is given that flag_pic is on and |
c98f8742 JVA |
1680 | that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ |
1681 | ||
f996902d | 1682 | #define LEGITIMATE_PIC_OPERAND_P(X) legitimate_pic_operand_p (X) |
c98f8742 JVA |
1683 | |
1684 | #define SYMBOLIC_CONST(X) \ | |
d9a5f180 GS |
1685 | (GET_CODE (X) == SYMBOL_REF \ |
1686 | || GET_CODE (X) == LABEL_REF \ | |
1687 | || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X))) | |
c98f8742 | 1688 | \f |
b08de47e MM |
1689 | /* Max number of args passed in registers. If this is more than 3, we will |
1690 | have problems with ebx (register #4), since it is a caller save register and | |
1691 | is also used as the pic register in ELF. So for now, don't allow more than | |
1692 | 3 registers to be passed in registers. */ | |
1693 | ||
7c800926 KT |
1694 | /* Abi specific values for REGPARM_MAX and SSE_REGPARM_MAX */ |
1695 | #define X86_64_REGPARM_MAX 6 | |
72fa3605 | 1696 | #define X86_64_MS_REGPARM_MAX 4 |
7c800926 | 1697 | |
72fa3605 | 1698 | #define X86_32_REGPARM_MAX 3 |
7c800926 | 1699 | |
4ae8027b | 1700 | #define REGPARM_MAX \ |
2824d6e5 UB |
1701 | (TARGET_64BIT \ |
1702 | ? (TARGET_64BIT_MS_ABI \ | |
1703 | ? X86_64_MS_REGPARM_MAX \ | |
1704 | : X86_64_REGPARM_MAX) \ | |
4ae8027b | 1705 | : X86_32_REGPARM_MAX) |
d2836273 | 1706 | |
72fa3605 UB |
1707 | #define X86_64_SSE_REGPARM_MAX 8 |
1708 | #define X86_64_MS_SSE_REGPARM_MAX 4 | |
1709 | ||
b6010cab | 1710 | #define X86_32_SSE_REGPARM_MAX (TARGET_SSE ? (TARGET_MACHO ? 4 : 3) : 0) |
72fa3605 | 1711 | |
4ae8027b | 1712 | #define SSE_REGPARM_MAX \ |
2824d6e5 UB |
1713 | (TARGET_64BIT \ |
1714 | ? (TARGET_64BIT_MS_ABI \ | |
1715 | ? X86_64_MS_SSE_REGPARM_MAX \ | |
1716 | : X86_64_SSE_REGPARM_MAX) \ | |
4ae8027b | 1717 | : X86_32_SSE_REGPARM_MAX) |
bcf17554 JH |
1718 | |
1719 | #define MMX_REGPARM_MAX (TARGET_64BIT ? 0 : (TARGET_MMX ? 3 : 0)) | |
c98f8742 JVA |
1720 | \f |
1721 | /* Specify the machine mode that this machine uses | |
1722 | for the index in the tablejump instruction. */ | |
dc4d7240 JH |
1723 | #define CASE_VECTOR_MODE \ |
1724 | (!TARGET_64BIT || (flag_pic && ix86_cmodel != CM_LARGE_PIC) ? SImode : DImode) | |
c98f8742 | 1725 | |
c98f8742 JVA |
1726 | /* Define this as 1 if `char' should by default be signed; else as 0. */ |
1727 | #define DEFAULT_SIGNED_CHAR 1 | |
1728 | ||
1729 | /* Max number of bytes we can move from memory to memory | |
1730 | in one reasonably fast instruction. */ | |
65d9c0ab JH |
1731 | #define MOVE_MAX 16 |
1732 | ||
1733 | /* MOVE_MAX_PIECES is the number of bytes at a time which we can | |
1734 | move efficiently, as opposed to MOVE_MAX which is the maximum | |
892a2d68 | 1735 | number of bytes we can move with a single instruction. */ |
63001560 | 1736 | #define MOVE_MAX_PIECES UNITS_PER_WORD |
c98f8742 | 1737 | |
7e24ffc9 | 1738 | /* If a memory-to-memory move would take MOVE_RATIO or more simple |
70128ad9 | 1739 | move-instruction pairs, we will do a movmem or libcall instead. |
7e24ffc9 HPN |
1740 | Increasing the value will always make code faster, but eventually |
1741 | incurs high cost in increased code size. | |
c98f8742 | 1742 | |
e2e52e1b | 1743 | If you don't define this, a reasonable default is used. */ |
c98f8742 | 1744 | |
e04ad03d | 1745 | #define MOVE_RATIO(speed) ((speed) ? ix86_cost->move_ratio : 3) |
c98f8742 | 1746 | |
45d78e7f JJ |
1747 | /* If a clear memory operation would take CLEAR_RATIO or more simple |
1748 | move-instruction sequences, we will do a clrmem or libcall instead. */ | |
1749 | ||
e04ad03d | 1750 | #define CLEAR_RATIO(speed) ((speed) ? MIN (6, ix86_cost->move_ratio) : 2) |
45d78e7f | 1751 | |
53f00dde UB |
1752 | /* Define if shifts truncate the shift count which implies one can |
1753 | omit a sign-extension or zero-extension of a shift count. | |
1754 | ||
1755 | On i386, shifts do truncate the count. But bit test instructions | |
1756 | take the modulo of the bit offset operand. */ | |
c98f8742 JVA |
1757 | |
1758 | /* #define SHIFT_COUNT_TRUNCATED */ | |
1759 | ||
1760 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
1761 | is done just by pretending it is already truncated. */ | |
1762 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
1763 | ||
d9f32422 JH |
1764 | /* A macro to update M and UNSIGNEDP when an object whose type is |
1765 | TYPE and which has the specified mode and signedness is to be | |
1766 | stored in a register. This macro is only called when TYPE is a | |
1767 | scalar type. | |
1768 | ||
f710504c | 1769 | On i386 it is sometimes useful to promote HImode and QImode |
d9f32422 JH |
1770 | quantities to SImode. The choice depends on target type. */ |
1771 | ||
1772 | #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ | |
d9a5f180 | 1773 | do { \ |
d9f32422 JH |
1774 | if (((MODE) == HImode && TARGET_PROMOTE_HI_REGS) \ |
1775 | || ((MODE) == QImode && TARGET_PROMOTE_QI_REGS)) \ | |
d9a5f180 GS |
1776 | (MODE) = SImode; \ |
1777 | } while (0) | |
d9f32422 | 1778 | |
c98f8742 JVA |
1779 | /* Specify the machine mode that pointers have. |
1780 | After generation of rtl, the compiler makes no further distinction | |
1781 | between pointers and any other objects of this machine mode. */ | |
65d9c0ab | 1782 | #define Pmode (TARGET_64BIT ? DImode : SImode) |
c98f8742 JVA |
1783 | |
1784 | /* A function address in a call instruction | |
1785 | is a byte address (for indexing purposes) | |
1786 | so give the MEM rtx a byte's mode. */ | |
1787 | #define FUNCTION_MODE QImode | |
d4ba09c0 | 1788 | \f |
d4ba09c0 | 1789 | |
d4ba09c0 SC |
1790 | /* A C expression for the cost of a branch instruction. A value of 1 |
1791 | is the default; other values are interpreted relative to that. */ | |
1792 | ||
3a4fd356 JH |
1793 | #define BRANCH_COST(speed_p, predictable_p) \ |
1794 | (!(speed_p) ? 2 : (predictable_p) ? 0 : ix86_branch_cost) | |
d4ba09c0 SC |
1795 | |
1796 | /* Define this macro as a C expression which is nonzero if accessing | |
1797 | less than a word of memory (i.e. a `char' or a `short') is no | |
1798 | faster than accessing a word of memory, i.e., if such access | |
1799 | require more than one instruction or if there is no difference in | |
1800 | cost between byte and (aligned) word loads. | |
1801 | ||
1802 | When this macro is not defined, the compiler will access a field by | |
1803 | finding the smallest containing object; when it is defined, a | |
1804 | fullword load will be used if alignment permits. Unless bytes | |
1805 | accesses are faster than word accesses, using word accesses is | |
1806 | preferable since it may eliminate subsequent memory access if | |
1807 | subsequent accesses occur to other fields in the same word of the | |
1808 | structure, but to different bytes. */ | |
1809 | ||
1810 | #define SLOW_BYTE_ACCESS 0 | |
1811 | ||
1812 | /* Nonzero if access to memory by shorts is slow and undesirable. */ | |
1813 | #define SLOW_SHORT_ACCESS 0 | |
1814 | ||
d4ba09c0 SC |
1815 | /* Define this macro to be the value 1 if unaligned accesses have a |
1816 | cost many times greater than aligned accesses, for example if they | |
1817 | are emulated in a trap handler. | |
1818 | ||
9cd10576 KH |
1819 | When this macro is nonzero, the compiler will act as if |
1820 | `STRICT_ALIGNMENT' were nonzero when generating code for block | |
d4ba09c0 | 1821 | moves. This can cause significantly more instructions to be |
9cd10576 | 1822 | produced. Therefore, do not set this macro nonzero if unaligned |
d4ba09c0 SC |
1823 | accesses only add a cycle or two to the time for a memory access. |
1824 | ||
1825 | If the value of this macro is always zero, it need not be defined. */ | |
1826 | ||
e1565e65 | 1827 | /* #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 0 */ |
d4ba09c0 | 1828 | |
d4ba09c0 SC |
1829 | /* Define this macro if it is as good or better to call a constant |
1830 | function address than to call an address kept in a register. | |
1831 | ||
1832 | Desirable on the 386 because a CALL with a constant address is | |
1833 | faster than one with a register address. */ | |
1834 | ||
1835 | #define NO_FUNCTION_CSE | |
c98f8742 | 1836 | \f |
c572e5ba JVA |
1837 | /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, |
1838 | return the mode to be used for the comparison. | |
1839 | ||
1840 | For floating-point equality comparisons, CCFPEQmode should be used. | |
e075ae69 | 1841 | VOIDmode should be used in all other cases. |
c572e5ba | 1842 | |
16189740 | 1843 | For integer comparisons against zero, reduce to CCNOmode or CCZmode if |
e075ae69 | 1844 | possible, to allow for more combinations. */ |
c98f8742 | 1845 | |
d9a5f180 | 1846 | #define SELECT_CC_MODE(OP, X, Y) ix86_cc_mode ((OP), (X), (Y)) |
9e7adcb3 | 1847 | |
9cd10576 | 1848 | /* Return nonzero if MODE implies a floating point inequality can be |
9e7adcb3 JH |
1849 | reversed. */ |
1850 | ||
1851 | #define REVERSIBLE_CC_MODE(MODE) 1 | |
1852 | ||
1853 | /* A C expression whose value is reversed condition code of the CODE for | |
1854 | comparison done in CC_MODE mode. */ | |
3c5cb3e4 | 1855 | #define REVERSE_CONDITION(CODE, MODE) ix86_reverse_condition ((CODE), (MODE)) |
9e7adcb3 | 1856 | |
c98f8742 JVA |
1857 | \f |
1858 | /* Control the assembler format that we output, to the extent | |
1859 | this does not vary between assemblers. */ | |
1860 | ||
1861 | /* How to refer to registers in assembler output. | |
892a2d68 | 1862 | This sequence is indexed by compiler's hard-register-number (see above). */ |
c98f8742 | 1863 | |
a7b376ee | 1864 | /* In order to refer to the first 8 regs as 32-bit regs, prefix an "e". |
c98f8742 JVA |
1865 | For non floating point regs, the following are the HImode names. |
1866 | ||
1867 | For float regs, the stack top is sometimes referred to as "%st(0)" | |
6e2188e0 NF |
1868 | instead of just "%st". TARGET_PRINT_OPERAND handles this with the |
1869 | "y" code. */ | |
c98f8742 | 1870 | |
a7180f70 BS |
1871 | #define HI_REGISTER_NAMES \ |
1872 | {"ax","dx","cx","bx","si","di","bp","sp", \ | |
480feac0 | 1873 | "st","st(1)","st(2)","st(3)","st(4)","st(5)","st(6)","st(7)", \ |
b0d95de8 | 1874 | "argp", "flags", "fpsr", "fpcr", "frame", \ |
a7180f70 | 1875 | "xmm0","xmm1","xmm2","xmm3","xmm4","xmm5","xmm6","xmm7", \ |
03c259ad | 1876 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7", \ |
3f3f2124 JH |
1877 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ |
1878 | "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"} | |
a7180f70 | 1879 | |
c98f8742 JVA |
1880 | #define REGISTER_NAMES HI_REGISTER_NAMES |
1881 | ||
1882 | /* Table of additional register names to use in user input. */ | |
1883 | ||
1884 | #define ADDITIONAL_REGISTER_NAMES \ | |
54d26233 MH |
1885 | { { "eax", 0 }, { "edx", 1 }, { "ecx", 2 }, { "ebx", 3 }, \ |
1886 | { "esi", 4 }, { "edi", 5 }, { "ebp", 6 }, { "esp", 7 }, \ | |
3f3f2124 JH |
1887 | { "rax", 0 }, { "rdx", 1 }, { "rcx", 2 }, { "rbx", 3 }, \ |
1888 | { "rsi", 4 }, { "rdi", 5 }, { "rbp", 6 }, { "rsp", 7 }, \ | |
54d26233 | 1889 | { "al", 0 }, { "dl", 1 }, { "cl", 2 }, { "bl", 3 }, \ |
21bf822e | 1890 | { "ah", 0 }, { "dh", 1 }, { "ch", 2 }, { "bh", 3 } } |
c98f8742 JVA |
1891 | |
1892 | /* Note we are omitting these since currently I don't know how | |
1893 | to get gcc to use these, since they want the same but different | |
1894 | number as al, and ax. | |
1895 | */ | |
1896 | ||
c98f8742 | 1897 | #define QI_REGISTER_NAMES \ |
3f3f2124 | 1898 | {"al", "dl", "cl", "bl", "sil", "dil", "bpl", "spl",} |
c98f8742 JVA |
1899 | |
1900 | /* These parallel the array above, and can be used to access bits 8:15 | |
892a2d68 | 1901 | of regs 0 through 3. */ |
c98f8742 JVA |
1902 | |
1903 | #define QI_HIGH_REGISTER_NAMES \ | |
1904 | {"ah", "dh", "ch", "bh", } | |
1905 | ||
1906 | /* How to renumber registers for dbx and gdb. */ | |
1907 | ||
d9a5f180 GS |
1908 | #define DBX_REGISTER_NUMBER(N) \ |
1909 | (TARGET_64BIT ? dbx64_register_map[(N)] : dbx_register_map[(N)]) | |
83774849 | 1910 | |
9a82e702 MS |
1911 | extern int const dbx_register_map[FIRST_PSEUDO_REGISTER]; |
1912 | extern int const dbx64_register_map[FIRST_PSEUDO_REGISTER]; | |
1913 | extern int const svr4_dbx_register_map[FIRST_PSEUDO_REGISTER]; | |
c98f8742 | 1914 | |
469ac993 JM |
1915 | /* Before the prologue, RA is at 0(%esp). */ |
1916 | #define INCOMING_RETURN_ADDR_RTX \ | |
f64cecad | 1917 | gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM)) |
fce5a9f2 | 1918 | |
e414ab29 | 1919 | /* After the prologue, RA is at -4(AP) in the current frame. */ |
1020a5ab RH |
1920 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ |
1921 | ((COUNT) == 0 \ | |
1922 | ? gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, -UNITS_PER_WORD)) \ | |
1923 | : gen_rtx_MEM (Pmode, plus_constant (FRAME, UNITS_PER_WORD))) | |
e414ab29 | 1924 | |
892a2d68 | 1925 | /* PC is dbx register 8; let's use that column for RA. */ |
0f7fa3d0 | 1926 | #define DWARF_FRAME_RETURN_COLUMN (TARGET_64BIT ? 16 : 8) |
469ac993 | 1927 | |
a6ab3aad | 1928 | /* Before the prologue, the top of the frame is at 4(%esp). */ |
0f7fa3d0 | 1929 | #define INCOMING_FRAME_SP_OFFSET UNITS_PER_WORD |
a6ab3aad | 1930 | |
1020a5ab | 1931 | /* Describe how we implement __builtin_eh_return. */ |
2824d6e5 UB |
1932 | #define EH_RETURN_DATA_REGNO(N) ((N) <= DX_REG ? (N) : INVALID_REGNUM) |
1933 | #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, CX_REG) | |
1020a5ab | 1934 | |
ad919812 | 1935 | |
e4c4ebeb RH |
1936 | /* Select a format to encode pointers in exception handling data. CODE |
1937 | is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is | |
1938 | true if the symbol may be affected by dynamic relocations. | |
1939 | ||
1940 | ??? All x86 object file formats are capable of representing this. | |
1941 | After all, the relocation needed is the same as for the call insn. | |
1942 | Whether or not a particular assembler allows us to enter such, I | |
1943 | guess we'll have to see. */ | |
d9a5f180 | 1944 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ |
72ce3d4a | 1945 | asm_preferred_eh_data_format ((CODE), (GLOBAL)) |
e4c4ebeb | 1946 | |
c98f8742 JVA |
1947 | /* This is how to output an insn to push a register on the stack. |
1948 | It need not be very fast code. */ | |
1949 | ||
d9a5f180 | 1950 | #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \ |
0d1c5774 JJ |
1951 | do { \ |
1952 | if (TARGET_64BIT) \ | |
1953 | asm_fprintf ((FILE), "\tpush{q}\t%%r%s\n", \ | |
1954 | reg_names[(REGNO)] + (REX_INT_REGNO_P (REGNO) != 0)); \ | |
1955 | else \ | |
1956 | asm_fprintf ((FILE), "\tpush{l}\t%%e%s\n", reg_names[(REGNO)]); \ | |
1957 | } while (0) | |
c98f8742 JVA |
1958 | |
1959 | /* This is how to output an insn to pop a register from the stack. | |
1960 | It need not be very fast code. */ | |
1961 | ||
d9a5f180 | 1962 | #define ASM_OUTPUT_REG_POP(FILE, REGNO) \ |
0d1c5774 JJ |
1963 | do { \ |
1964 | if (TARGET_64BIT) \ | |
1965 | asm_fprintf ((FILE), "\tpop{q}\t%%r%s\n", \ | |
1966 | reg_names[(REGNO)] + (REX_INT_REGNO_P (REGNO) != 0)); \ | |
1967 | else \ | |
1968 | asm_fprintf ((FILE), "\tpop{l}\t%%e%s\n", reg_names[(REGNO)]); \ | |
1969 | } while (0) | |
c98f8742 | 1970 | |
f88c65f7 | 1971 | /* This is how to output an element of a case-vector that is absolute. */ |
c98f8742 JVA |
1972 | |
1973 | #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
d9a5f180 | 1974 | ix86_output_addr_vec_elt ((FILE), (VALUE)) |
c98f8742 | 1975 | |
f88c65f7 | 1976 | /* This is how to output an element of a case-vector that is relative. */ |
c98f8742 | 1977 | |
33f7f353 | 1978 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
d9a5f180 | 1979 | ix86_output_addr_diff_elt ((FILE), (VALUE), (REL)) |
f88c65f7 | 1980 | |
63001560 | 1981 | /* When we see %v, we will print the 'v' prefix if TARGET_AVX is true. */ |
95879c72 L |
1982 | |
1983 | #define ASM_OUTPUT_AVX_PREFIX(STREAM, PTR) \ | |
1984 | { \ | |
1985 | if ((PTR)[0] == '%' && (PTR)[1] == 'v') \ | |
63001560 | 1986 | (PTR) += TARGET_AVX ? 1 : 2; \ |
95879c72 L |
1987 | } |
1988 | ||
1989 | /* A C statement or statements which output an assembler instruction | |
1990 | opcode to the stdio stream STREAM. The macro-operand PTR is a | |
1991 | variable of type `char *' which points to the opcode name in | |
1992 | its "internal" form--the form that is written in the machine | |
1993 | description. */ | |
1994 | ||
1995 | #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ | |
1996 | ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)) | |
1997 | ||
6a90d232 L |
1998 | /* A C statement to output to the stdio stream FILE an assembler |
1999 | command to pad the location counter to a multiple of 1<<LOG | |
2000 | bytes if it is within MAX_SKIP bytes. */ | |
2001 | ||
2002 | #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN | |
2003 | #undef ASM_OUTPUT_MAX_SKIP_PAD | |
2004 | #define ASM_OUTPUT_MAX_SKIP_PAD(FILE, LOG, MAX_SKIP) \ | |
2005 | if ((LOG) != 0) \ | |
2006 | { \ | |
2007 | if ((MAX_SKIP) == 0) \ | |
2008 | fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ | |
2009 | else \ | |
2010 | fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ | |
2011 | } | |
2012 | #endif | |
2013 | ||
135a687e KT |
2014 | /* Write the extra assembler code needed to declare a function |
2015 | properly. */ | |
2016 | ||
2017 | #undef ASM_OUTPUT_FUNCTION_LABEL | |
2018 | #define ASM_OUTPUT_FUNCTION_LABEL(FILE, NAME, DECL) \ | |
2019 | ix86_asm_output_function_label (FILE, NAME, DECL) | |
2020 | ||
f7288899 EC |
2021 | /* Under some conditions we need jump tables in the text section, |
2022 | because the assembler cannot handle label differences between | |
2023 | sections. This is the case for x86_64 on Mach-O for example. */ | |
f88c65f7 RH |
2024 | |
2025 | #define JUMP_TABLES_IN_TEXT_SECTION \ | |
f7288899 EC |
2026 | (flag_pic && ((TARGET_MACHO && TARGET_64BIT) \ |
2027 | || (!TARGET_64BIT && !HAVE_AS_GOTOFF_IN_DATA))) | |
c98f8742 | 2028 | |
cea3bd3e RH |
2029 | /* Switch to init or fini section via SECTION_OP, emit a call to FUNC, |
2030 | and switch back. For x86 we do this only to save a few bytes that | |
2031 | would otherwise be unused in the text section. */ | |
ad211091 KT |
2032 | #define CRT_MKSTR2(VAL) #VAL |
2033 | #define CRT_MKSTR(x) CRT_MKSTR2(x) | |
2034 | ||
2035 | #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ | |
2036 | asm (SECTION_OP "\n\t" \ | |
2037 | "call " CRT_MKSTR(__USER_LABEL_PREFIX__) #FUNC "\n" \ | |
cea3bd3e | 2038 | TEXT_SECTION_ASM_OP); |
74b42c8b | 2039 | \f |
5bf0ebab RH |
2040 | /* Which processor to schedule for. The cpu attribute defines a list that |
2041 | mirrors this list, so changes to i386.md must be made at the same time. */ | |
2042 | ||
2043 | enum processor_type | |
2044 | { | |
8383d43c | 2045 | PROCESSOR_I386 = 0, /* 80386 */ |
5bf0ebab RH |
2046 | PROCESSOR_I486, /* 80486DX, 80486SX, 80486DX[24] */ |
2047 | PROCESSOR_PENTIUM, | |
2048 | PROCESSOR_PENTIUMPRO, | |
cfe1b18f | 2049 | PROCESSOR_GEODE, |
5bf0ebab RH |
2050 | PROCESSOR_K6, |
2051 | PROCESSOR_ATHLON, | |
2052 | PROCESSOR_PENTIUM4, | |
4977bab6 | 2053 | PROCESSOR_K8, |
89c43c0a | 2054 | PROCESSOR_NOCONA, |
05f85dbb | 2055 | PROCESSOR_CORE2, |
d326eaf0 JH |
2056 | PROCESSOR_GENERIC32, |
2057 | PROCESSOR_GENERIC64, | |
21efb4d4 | 2058 | PROCESSOR_AMDFAM10, |
1133125e | 2059 | PROCESSOR_BDVER1, |
b6837b94 | 2060 | PROCESSOR_ATOM, |
5bf0ebab RH |
2061 | PROCESSOR_max |
2062 | }; | |
2063 | ||
9e555526 | 2064 | extern enum processor_type ix86_tune; |
5bf0ebab | 2065 | extern enum processor_type ix86_arch; |
5bf0ebab RH |
2066 | |
2067 | enum fpmath_unit | |
2068 | { | |
2069 | FPMATH_387 = 1, | |
2070 | FPMATH_SSE = 2 | |
2071 | }; | |
2072 | ||
2073 | extern enum fpmath_unit ix86_fpmath; | |
5bf0ebab | 2074 | |
f996902d RH |
2075 | enum tls_dialect |
2076 | { | |
2077 | TLS_DIALECT_GNU, | |
5bf5a10b | 2078 | TLS_DIALECT_GNU2, |
f996902d RH |
2079 | TLS_DIALECT_SUN |
2080 | }; | |
2081 | ||
2082 | extern enum tls_dialect ix86_tls_dialect; | |
f996902d | 2083 | |
6189a572 | 2084 | enum cmodel { |
5bf0ebab RH |
2085 | CM_32, /* The traditional 32-bit ABI. */ |
2086 | CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */ | |
2087 | CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */ | |
2088 | CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */ | |
2089 | CM_LARGE, /* No assumptions. */ | |
7dcbf659 | 2090 | CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */ |
dc4d7240 JH |
2091 | CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */ |
2092 | CM_LARGE_PIC /* No assumptions. */ | |
6189a572 JH |
2093 | }; |
2094 | ||
5bf0ebab | 2095 | extern enum cmodel ix86_cmodel; |
5bf0ebab | 2096 | |
8362f420 JH |
2097 | /* Size of the RED_ZONE area. */ |
2098 | #define RED_ZONE_SIZE 128 | |
2099 | /* Reserved area of the red zone for temporaries. */ | |
2100 | #define RED_ZONE_RESERVE 8 | |
c93e80a5 JH |
2101 | |
2102 | enum asm_dialect { | |
2103 | ASM_ATT, | |
2104 | ASM_INTEL | |
2105 | }; | |
5bf0ebab | 2106 | |
80f33d06 | 2107 | extern enum asm_dialect ix86_asm_dialect; |
95899b34 | 2108 | extern unsigned int ix86_preferred_stack_boundary; |
2e3f842f | 2109 | extern unsigned int ix86_incoming_stack_boundary; |
7dcbf659 | 2110 | extern int ix86_branch_cost, ix86_section_threshold; |
5bf0ebab RH |
2111 | |
2112 | /* Smallest class containing REGNO. */ | |
2113 | extern enum reg_class const regclass_map[FIRST_PSEUDO_REGISTER]; | |
2114 | ||
0948ccb2 PB |
2115 | enum ix86_fpcmp_strategy { |
2116 | IX86_FPCMP_SAHF, | |
2117 | IX86_FPCMP_COMI, | |
2118 | IX86_FPCMP_ARITH | |
2119 | }; | |
22fb740d JH |
2120 | \f |
2121 | /* To properly truncate FP values into integers, we need to set i387 control | |
2122 | word. We can't emit proper mode switching code before reload, as spills | |
2123 | generated by reload may truncate values incorrectly, but we still can avoid | |
2124 | redundant computation of new control word by the mode switching pass. | |
2125 | The fldcw instructions are still emitted redundantly, but this is probably | |
2126 | not going to be noticeable problem, as most CPUs do have fast path for | |
fce5a9f2 | 2127 | the sequence. |
22fb740d JH |
2128 | |
2129 | The machinery is to emit simple truncation instructions and split them | |
2130 | before reload to instructions having USEs of two memory locations that | |
2131 | are filled by this code to old and new control word. | |
fce5a9f2 | 2132 | |
22fb740d JH |
2133 | Post-reload pass may be later used to eliminate the redundant fildcw if |
2134 | needed. */ | |
2135 | ||
ff680eb1 UB |
2136 | enum ix86_entity |
2137 | { | |
2138 | I387_TRUNC = 0, | |
2139 | I387_FLOOR, | |
2140 | I387_CEIL, | |
2141 | I387_MASK_PM, | |
2142 | MAX_386_ENTITIES | |
2143 | }; | |
2144 | ||
1cba2b96 | 2145 | enum ix86_stack_slot |
ff680eb1 | 2146 | { |
80dcd3aa UB |
2147 | SLOT_VIRTUAL = 0, |
2148 | SLOT_TEMP, | |
ff680eb1 UB |
2149 | SLOT_CW_STORED, |
2150 | SLOT_CW_TRUNC, | |
2151 | SLOT_CW_FLOOR, | |
2152 | SLOT_CW_CEIL, | |
2153 | SLOT_CW_MASK_PM, | |
2154 | MAX_386_STACK_LOCALS | |
2155 | }; | |
22fb740d JH |
2156 | |
2157 | /* Define this macro if the port needs extra instructions inserted | |
2158 | for mode switching in an optimizing compilation. */ | |
2159 | ||
ff680eb1 UB |
2160 | #define OPTIMIZE_MODE_SWITCHING(ENTITY) \ |
2161 | ix86_optimize_mode_switching[(ENTITY)] | |
22fb740d JH |
2162 | |
2163 | /* If you define `OPTIMIZE_MODE_SWITCHING', you have to define this as | |
2164 | initializer for an array of integers. Each initializer element N | |
2165 | refers to an entity that needs mode switching, and specifies the | |
2166 | number of different modes that might need to be set for this | |
2167 | entity. The position of the initializer in the initializer - | |
2168 | starting counting at zero - determines the integer that is used to | |
2169 | refer to the mode-switched entity in question. */ | |
2170 | ||
ff680eb1 UB |
2171 | #define NUM_MODES_FOR_MODE_SWITCHING \ |
2172 | { I387_CW_ANY, I387_CW_ANY, I387_CW_ANY, I387_CW_ANY } | |
22fb740d JH |
2173 | |
2174 | /* ENTITY is an integer specifying a mode-switched entity. If | |
2175 | `OPTIMIZE_MODE_SWITCHING' is defined, you must define this macro to | |
2176 | return an integer value not larger than the corresponding element | |
2177 | in `NUM_MODES_FOR_MODE_SWITCHING', to denote the mode that ENTITY | |
ff680eb1 UB |
2178 | must be switched into prior to the execution of INSN. */ |
2179 | ||
2180 | #define MODE_NEEDED(ENTITY, I) ix86_mode_needed ((ENTITY), (I)) | |
22fb740d JH |
2181 | |
2182 | /* This macro specifies the order in which modes for ENTITY are | |
2183 | processed. 0 is the highest priority. */ | |
2184 | ||
d9a5f180 | 2185 | #define MODE_PRIORITY_TO_MODE(ENTITY, N) (N) |
22fb740d JH |
2186 | |
2187 | /* Generate one or more insns to set ENTITY to MODE. HARD_REG_LIVE | |
2188 | is the set of hard registers live at the point where the insn(s) | |
2189 | are to be inserted. */ | |
2190 | ||
2191 | #define EMIT_MODE_SET(ENTITY, MODE, HARD_REGS_LIVE) \ | |
1d1df0df | 2192 | ((MODE) != I387_CW_ANY && (MODE) != I387_CW_UNINITIALIZED \ |
ff680eb1 | 2193 | ? emit_i387_cw_initialization (MODE), 0 \ |
22fb740d | 2194 | : 0) |
ff680eb1 | 2195 | |
0f0138b6 JH |
2196 | \f |
2197 | /* Avoid renaming of stack registers, as doing so in combination with | |
2198 | scheduling just increases amount of live registers at time and in | |
2199 | the turn amount of fxch instructions needed. | |
2200 | ||
43f3a59d | 2201 | ??? Maybe Pentium chips benefits from renaming, someone can try.... */ |
0f0138b6 | 2202 | |
d9a5f180 | 2203 | #define HARD_REGNO_RENAME_OK(SRC, TARGET) \ |
fb84c7a0 | 2204 | (! IN_RANGE ((SRC), FIRST_STACK_REG, LAST_STACK_REG)) |
22fb740d | 2205 | |
3b3c6a3f | 2206 | \f |
e91f04de | 2207 | #define FASTCALL_PREFIX '@' |
fa1a0d02 | 2208 | \f |
ec7ded37 | 2209 | /* Machine specific frame tracking during prologue/epilogue generation. */ |
cd9c1ca8 | 2210 | |
604a6be9 | 2211 | #ifndef USED_FOR_TARGET |
ec7ded37 | 2212 | struct GTY(()) machine_frame_state |
cd9c1ca8 | 2213 | { |
ec7ded37 RH |
2214 | /* This pair tracks the currently active CFA as reg+offset. When reg |
2215 | is drap_reg, we don't bother trying to record here the real CFA when | |
2216 | it might really be a DW_CFA_def_cfa_expression. */ | |
2217 | rtx cfa_reg; | |
2218 | HOST_WIDE_INT cfa_offset; | |
2219 | ||
2220 | /* The current offset (canonically from the CFA) of ESP and EBP. | |
2221 | When stack frame re-alignment is active, these may not be relative | |
2222 | to the CFA. However, in all cases they are relative to the offsets | |
2223 | of the saved registers stored in ix86_frame. */ | |
2224 | HOST_WIDE_INT sp_offset; | |
2225 | HOST_WIDE_INT fp_offset; | |
2226 | ||
2227 | /* The size of the red-zone that may be assumed for the purposes of | |
2228 | eliding register restore notes in the epilogue. This may be zero | |
2229 | if no red-zone is in effect, or may be reduced from the real | |
2230 | red-zone value by a maximum runtime stack re-alignment value. */ | |
2231 | int red_zone_offset; | |
2232 | ||
2233 | /* Indicate whether each of ESP, EBP or DRAP currently holds a valid | |
2234 | value within the frame. If false then the offset above should be | |
2235 | ignored. Note that DRAP, if valid, *always* points to the CFA and | |
2236 | thus has an offset of zero. */ | |
2237 | BOOL_BITFIELD sp_valid : 1; | |
2238 | BOOL_BITFIELD fp_valid : 1; | |
2239 | BOOL_BITFIELD drap_valid : 1; | |
c9f4c451 RH |
2240 | |
2241 | /* Indicate whether the local stack frame has been re-aligned. When | |
2242 | set, the SP/FP offsets above are relative to the aligned frame | |
2243 | and not the CFA. */ | |
2244 | BOOL_BITFIELD realigned : 1; | |
cd9c1ca8 RH |
2245 | }; |
2246 | ||
d1b38208 | 2247 | struct GTY(()) machine_function { |
fa1a0d02 JH |
2248 | struct stack_local_entry *stack_locals; |
2249 | const char *some_ld_name; | |
4aab97f9 L |
2250 | int varargs_gpr_size; |
2251 | int varargs_fpr_size; | |
ff680eb1 | 2252 | int optimize_mode_switching[MAX_386_ENTITIES]; |
3452586b RH |
2253 | |
2254 | /* Number of saved registers USE_FAST_PROLOGUE_EPILOGUE | |
2255 | has been computed for. */ | |
2256 | int use_fast_prologue_epilogue_nregs; | |
2257 | ||
7458026b ILT |
2258 | /* For -fsplit-stack support: A stack local which holds a pointer to |
2259 | the stack arguments for a function with a variable number of | |
2260 | arguments. This is set at the start of the function and is used | |
2261 | to initialize the overflow_arg_area field of the va_list | |
2262 | structure. */ | |
2263 | rtx split_stack_varargs_pointer; | |
2264 | ||
3452586b RH |
2265 | /* This value is used for amd64 targets and specifies the current abi |
2266 | to be used. MS_ABI means ms abi. Otherwise SYSV_ABI means sysv abi. */ | |
25efe060 | 2267 | ENUM_BITFIELD(calling_abi) call_abi : 8; |
3452586b RH |
2268 | |
2269 | /* Nonzero if the function accesses a previous frame. */ | |
2270 | BOOL_BITFIELD accesses_prev_frame : 1; | |
2271 | ||
2272 | /* Nonzero if the function requires a CLD in the prologue. */ | |
2273 | BOOL_BITFIELD needs_cld : 1; | |
2274 | ||
922e3e33 UB |
2275 | /* Set by ix86_compute_frame_layout and used by prologue/epilogue |
2276 | expander to determine the style used. */ | |
3452586b RH |
2277 | BOOL_BITFIELD use_fast_prologue_epilogue : 1; |
2278 | ||
5bf5a10b AO |
2279 | /* If true, the current function needs the default PIC register, not |
2280 | an alternate register (on x86) and must not use the red zone (on | |
2281 | x86_64), even if it's a leaf function. We don't want the | |
2282 | function to be regarded as non-leaf because TLS calls need not | |
2283 | affect register allocation. This flag is set when a TLS call | |
2284 | instruction is expanded within a function, and never reset, even | |
2285 | if all such instructions are optimized away. Use the | |
2286 | ix86_current_function_calls_tls_descriptor macro for a better | |
2287 | approximation. */ | |
3452586b RH |
2288 | BOOL_BITFIELD tls_descriptor_call_expanded_p : 1; |
2289 | ||
2290 | /* If true, the current function has a STATIC_CHAIN is placed on the | |
2291 | stack below the return address. */ | |
2292 | BOOL_BITFIELD static_chain_on_stack : 1; | |
25efe060 | 2293 | |
2767a7f2 L |
2294 | /* Nonzero if the current function uses vzeroupper. */ |
2295 | BOOL_BITFIELD use_vzeroupper_p : 1; | |
2296 | ||
2297 | /* Nonzero if the current function uses 256bit AVX regisers. */ | |
2298 | BOOL_BITFIELD use_avx256_p : 1; | |
2299 | ||
2300 | /* Nonzero if caller passes 256bit AVX modes. */ | |
2301 | BOOL_BITFIELD caller_pass_avx256_p : 1; | |
2302 | ||
2303 | /* Nonzero if caller returns 256bit AVX modes. */ | |
2304 | BOOL_BITFIELD caller_return_avx256_p : 1; | |
2305 | ||
2306 | /* Nonzero if the current callee passes 256bit AVX modes. */ | |
2307 | BOOL_BITFIELD callee_pass_avx256_p : 1; | |
2308 | ||
2309 | /* Nonzero if the current callee returns 256bit AVX modes. */ | |
2310 | BOOL_BITFIELD callee_return_avx256_p : 1; | |
2311 | ||
ec7ded37 RH |
2312 | /* During prologue/epilogue generation, the current frame state. |
2313 | Otherwise, the frame state at the end of the prologue. */ | |
2314 | struct machine_frame_state fs; | |
fa1a0d02 | 2315 | }; |
cd9c1ca8 | 2316 | #endif |
fa1a0d02 JH |
2317 | |
2318 | #define ix86_stack_locals (cfun->machine->stack_locals) | |
4aab97f9 L |
2319 | #define ix86_varargs_gpr_size (cfun->machine->varargs_gpr_size) |
2320 | #define ix86_varargs_fpr_size (cfun->machine->varargs_fpr_size) | |
fa1a0d02 | 2321 | #define ix86_optimize_mode_switching (cfun->machine->optimize_mode_switching) |
922e3e33 | 2322 | #define ix86_current_function_needs_cld (cfun->machine->needs_cld) |
5bf5a10b AO |
2323 | #define ix86_tls_descriptor_calls_expanded_in_cfun \ |
2324 | (cfun->machine->tls_descriptor_call_expanded_p) | |
2325 | /* Since tls_descriptor_call_expanded is not cleared, even if all TLS | |
2326 | calls are optimized away, we try to detect cases in which it was | |
2327 | optimized away. Since such instructions (use (reg REG_SP)), we can | |
2328 | verify whether there's any such instruction live by testing that | |
2329 | REG_SP is live. */ | |
2330 | #define ix86_current_function_calls_tls_descriptor \ | |
6fb5fa3c | 2331 | (ix86_tls_descriptor_calls_expanded_in_cfun && df_regs_ever_live_p (SP_REG)) |
3452586b | 2332 | #define ix86_static_chain_on_stack (cfun->machine->static_chain_on_stack) |
249e6b63 | 2333 | |
1bc7c5b6 ZW |
2334 | /* Control behavior of x86_file_start. */ |
2335 | #define X86_FILE_START_VERSION_DIRECTIVE false | |
2336 | #define X86_FILE_START_FLTUSED false | |
2337 | ||
7dcbf659 JH |
2338 | /* Flag to mark data that is in the large address area. */ |
2339 | #define SYMBOL_FLAG_FAR_ADDR (SYMBOL_FLAG_MACH_DEP << 0) | |
2340 | #define SYMBOL_REF_FAR_ADDR_P(X) \ | |
2341 | ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_FAR_ADDR) != 0) | |
da489f73 RH |
2342 | |
2343 | /* Flags to mark dllimport/dllexport. Used by PE ports, but handy to | |
2344 | have defined always, to avoid ifdefing. */ | |
2345 | #define SYMBOL_FLAG_DLLIMPORT (SYMBOL_FLAG_MACH_DEP << 1) | |
2346 | #define SYMBOL_REF_DLLIMPORT_P(X) \ | |
2347 | ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_DLLIMPORT) != 0) | |
2348 | ||
2349 | #define SYMBOL_FLAG_DLLEXPORT (SYMBOL_FLAG_MACH_DEP << 2) | |
2350 | #define SYMBOL_REF_DLLEXPORT_P(X) \ | |
2351 | ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_DLLEXPORT) != 0) | |
2352 | ||
7942e47e RY |
2353 | extern void debug_ready_dispatch (void); |
2354 | extern void debug_dispatch_window (int); | |
2355 | ||
c98f8742 JVA |
2356 | /* |
2357 | Local variables: | |
2358 | version-control: t | |
2359 | End: | |
2360 | */ |