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e075ae69 | 1 | /* Definitions of target machine for GNU compiler for IA-32. |
cf011243 AO |
2 | Copyright (C) 1988, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
3 | 2001 Free Software Foundation, Inc. | |
c98f8742 JVA |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
97aadbb9 | 19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
d4ba09c0 | 20 | Boston, MA 02111-1307, USA. */ |
c98f8742 JVA |
21 | |
22 | /* The purpose of this file is to define the characteristics of the i386, | |
b4ac57ab | 23 | independent of assembler syntax or operating system. |
c98f8742 JVA |
24 | |
25 | Three other files build on this one to describe a specific assembler syntax: | |
26 | bsd386.h, att386.h, and sun386.h. | |
27 | ||
28 | The actual tm.h file for a particular system should include | |
29 | this file, and then the file for the appropriate assembler syntax. | |
30 | ||
31 | Many macros that specify assembler syntax are omitted entirely from | |
32 | this file because they really belong in the files for particular | |
e075ae69 RH |
33 | assemblers. These include RP, IP, LPREFIX, PUT_OP_SIZE, USE_STAR, |
34 | ADDR_BEG, ADDR_END, PRINT_IREG, PRINT_SCALE, PRINT_B_I_S, and many | |
35 | that start with ASM_ or end in ASM_OP. */ | |
c98f8742 | 36 | |
95393dfd CH |
37 | /* Stubs for half-pic support if not OSF/1 reference platform. */ |
38 | ||
39 | #ifndef HALF_PIC_P | |
40 | #define HALF_PIC_P() 0 | |
41 | #define HALF_PIC_NUMBER_PTRS 0 | |
42 | #define HALF_PIC_NUMBER_REFS 0 | |
43 | #define HALF_PIC_ENCODE(DECL) | |
44 | #define HALF_PIC_DECLARE(NAME) | |
45 | #define HALF_PIC_INIT() error ("half-pic init called on systems that don't support it.") | |
46 | #define HALF_PIC_ADDRESS_P(X) 0 | |
47 | #define HALF_PIC_PTR(X) X | |
48 | #define HALF_PIC_FINISH(STREAM) | |
49 | #endif | |
50 | ||
d4ba09c0 SC |
51 | /* Define the specific costs for a given cpu */ |
52 | ||
53 | struct processor_costs { | |
54 | int add; /* cost of an add instruction */ | |
55 | int lea; /* cost of a lea instruction */ | |
56 | int shift_var; /* variable shift costs */ | |
57 | int shift_const; /* constant shift costs */ | |
58 | int mult_init; /* cost of starting a multiply */ | |
59 | int mult_bit; /* cost of multiply per each bit set */ | |
60 | int divide; /* cost of a divide/mod */ | |
e075ae69 | 61 | int large_insn; /* insns larger than this cost more */ |
ac775968 ZW |
62 | int move_ratio; /* The threshold of number of scalar |
63 | memory-to-memory move insns. */ | |
7c6b971d | 64 | int movzbl_load; /* cost of loading using movzbl */ |
96e7ae40 JH |
65 | int int_load[3]; /* cost of loading integer registers |
66 | in QImode, HImode and SImode relative | |
67 | to reg-reg move (2). */ | |
68 | int int_store[3]; /* cost of storing integer register | |
69 | in QImode, HImode and SImode */ | |
70 | int fp_move; /* cost of reg,reg fld/fst */ | |
71 | int fp_load[3]; /* cost of loading FP register | |
72 | in SFmode, DFmode and XFmode */ | |
73 | int fp_store[3]; /* cost of storing FP register | |
74 | in SFmode, DFmode and XFmode */ | |
fa79946e JH |
75 | int mmx_move; /* cost of moving MMX register. */ |
76 | int mmx_load[2]; /* cost of loading MMX register | |
77 | in SImode and DImode */ | |
78 | int mmx_store[2]; /* cost of storing MMX register | |
79 | in SImode and DImode */ | |
80 | int sse_move; /* cost of moving SSE register. */ | |
81 | int sse_load[3]; /* cost of loading SSE register | |
82 | in SImode, DImode and TImode*/ | |
83 | int sse_store[3]; /* cost of storing SSE register | |
84 | in SImode, DImode and TImode*/ | |
85 | int mmxsse_to_integer; /* cost of moving mmxsse register to | |
86 | integer and vice versa. */ | |
d4ba09c0 SC |
87 | }; |
88 | ||
89 | extern struct processor_costs *ix86_cost; | |
90 | ||
c98f8742 JVA |
91 | /* Run-time compilation parameters selecting different hardware subsets. */ |
92 | ||
93 | extern int target_flags; | |
94 | ||
95 | /* Macros used in the machine description to test the flags. */ | |
96 | ||
ddd5a7c1 | 97 | /* configure can arrange to make this 2, to force a 486. */ |
e075ae69 | 98 | |
35b528be RS |
99 | #ifndef TARGET_CPU_DEFAULT |
100 | #define TARGET_CPU_DEFAULT 0 | |
101 | #endif | |
102 | ||
3b3c6a3f | 103 | /* Masks for the -m switches */ |
e075ae69 RH |
104 | #define MASK_80387 0x00000001 /* Hardware floating point */ |
105 | #define MASK_RTD 0x00000002 /* Use ret that pops args */ | |
106 | #define MASK_ALIGN_DOUBLE 0x00000004 /* align doubles to 2 word boundary */ | |
107 | #define MASK_SVR3_SHLIB 0x00000008 /* Uninit locals into bss */ | |
108 | #define MASK_IEEE_FP 0x00000010 /* IEEE fp comparisons */ | |
109 | #define MASK_FLOAT_RETURNS 0x00000020 /* Return float in st(0) */ | |
110 | #define MASK_NO_FANCY_MATH_387 0x00000040 /* Disable sin, cos, sqrt */ | |
111 | #define MASK_OMIT_LEAF_FRAME_POINTER 0x080 /* omit leaf frame pointers */ | |
112 | #define MASK_STACK_PROBE 0x00000100 /* Enable stack probing */ | |
79f05c19 JH |
113 | #define MASK_NO_ALIGN_STROPS 0x00001000 /* Enable aligning of string ops. */ |
114 | #define MASK_INLINE_ALL_STROPS 0x00002000 /* Inline stringops in all cases */ | |
f73ad30e JH |
115 | #define MASK_NO_PUSH_ARGS 0x00004000 /* Use push instructions */ |
116 | #define MASK_ACCUMULATE_OUTGOING_ARGS 0x00008000/* Accumulate outgoing args */ | |
c6036a37 JH |
117 | #define MASK_NO_ACCUMULATE_OUTGOING_ARGS 0x00010000 |
118 | #define MASK_MMX 0x00020000 /* Support MMX regs/builtins */ | |
119 | #define MASK_SSE 0x00040000 /* Support SSE regs/builtins */ | |
120 | #define MASK_SSE2 0x00080000 /* Support SSE2 regs/builtins */ | |
47f339cf BS |
121 | #define MASK_3DNOW 0x00100000 /* Support 3Dnow builtins */ |
122 | #define MASK_3DNOW_A 0x00200000 /* Support Athlon 3Dnow builtins */ | |
123 | #define MASK_128BIT_LONG_DOUBLE 0x00400000 /* long double size is 128bit */ | |
124 | #define MASK_MIX_SSE_I387 0x00800000 /* Mix SSE and i387 instructions */ | |
125 | #define MASK_64BIT 0x01000000 /* Produce 64bit code */ | |
126 | #define MASK_NO_RED_ZONE 0x02000000 /* Do not use red zone */ | |
e075ae69 RH |
127 | |
128 | /* Temporary codegen switches */ | |
dc174fb1 MM |
129 | #define MASK_INTEL_SYNTAX 0x00000200 |
130 | #define MASK_DEBUG_ARG 0x00000400 /* function_arg */ | |
131 | #define MASK_DEBUG_ADDR 0x00000800 /* GO_IF_LEGITIMATE_ADDRESS */ | |
3b3c6a3f MM |
132 | |
133 | /* Use the floating point instructions */ | |
134 | #define TARGET_80387 (target_flags & MASK_80387) | |
135 | ||
c98f8742 JVA |
136 | /* Compile using ret insn that pops args. |
137 | This will not work unless you use prototypes at least | |
138 | for all functions that can take varying numbers of args. */ | |
3b3c6a3f MM |
139 | #define TARGET_RTD (target_flags & MASK_RTD) |
140 | ||
b08de47e MM |
141 | /* Align doubles to a two word boundary. This breaks compatibility with |
142 | the published ABI's for structures containing doubles, but produces | |
143 | faster code on the pentium. */ | |
144 | #define TARGET_ALIGN_DOUBLE (target_flags & MASK_ALIGN_DOUBLE) | |
c98f8742 | 145 | |
f73ad30e JH |
146 | /* Use push instructions to save outgoing args. */ |
147 | #define TARGET_PUSH_ARGS (!(target_flags & MASK_NO_PUSH_ARGS)) | |
148 | ||
149 | /* Accumulate stack adjustments to prologue/epilogue. */ | |
150 | #define TARGET_ACCUMULATE_OUTGOING_ARGS \ | |
151 | (target_flags & MASK_ACCUMULATE_OUTGOING_ARGS) | |
152 | ||
d7cd15e9 RS |
153 | /* Put uninitialized locals into bss, not data. |
154 | Meaningful only on svr3. */ | |
3b3c6a3f | 155 | #define TARGET_SVR3_SHLIB (target_flags & MASK_SVR3_SHLIB) |
d7cd15e9 | 156 | |
c572e5ba JVA |
157 | /* Use IEEE floating point comparisons. These handle correctly the cases |
158 | where the result of a comparison is unordered. Normally SIGFPE is | |
159 | generated in such cases, in which case this isn't needed. */ | |
3b3c6a3f | 160 | #define TARGET_IEEE_FP (target_flags & MASK_IEEE_FP) |
c572e5ba | 161 | |
8c2bf92a JVA |
162 | /* Functions that return a floating point value may return that value |
163 | in the 387 FPU or in 386 integer registers. If set, this flag causes | |
164 | the 387 to be used, which is compatible with most calling conventions. */ | |
3b3c6a3f | 165 | #define TARGET_FLOAT_RETURNS_IN_80387 (target_flags & MASK_FLOAT_RETURNS) |
8c2bf92a | 166 | |
2b589241 JH |
167 | /* Long double is 128bit instead of 96bit, even when only 80bits are used. |
168 | This mode wastes cache, but avoid missaligned data accesses and simplifies | |
169 | address calculations. */ | |
170 | #define TARGET_128BIT_LONG_DOUBLE (target_flags & MASK_128BIT_LONG_DOUBLE) | |
171 | ||
099800e3 RK |
172 | /* Disable generation of FP sin, cos and sqrt operations for 387. |
173 | This is because FreeBSD lacks these in the math-emulator-code */ | |
3b3c6a3f MM |
174 | #define TARGET_NO_FANCY_MATH_387 (target_flags & MASK_NO_FANCY_MATH_387) |
175 | ||
2f2fa5b1 | 176 | /* Don't create frame pointers for leaf functions */ |
e075ae69 RH |
177 | #define TARGET_OMIT_LEAF_FRAME_POINTER \ |
178 | (target_flags & MASK_OMIT_LEAF_FRAME_POINTER) | |
f6f58ba3 | 179 | |
3b3c6a3f MM |
180 | /* Debug GO_IF_LEGITIMATE_ADDRESS */ |
181 | #define TARGET_DEBUG_ADDR (target_flags & MASK_DEBUG_ADDR) | |
182 | ||
b08de47e MM |
183 | /* Debug FUNCTION_ARG macros */ |
184 | #define TARGET_DEBUG_ARG (target_flags & MASK_DEBUG_ARG) | |
185 | ||
25f94bb5 | 186 | /* 64bit Sledgehammer mode */ |
0c2dc519 | 187 | #ifdef TARGET_BI_ARCH |
25f94bb5 | 188 | #define TARGET_64BIT (target_flags & MASK_64BIT) |
0c2dc519 JH |
189 | #else |
190 | #ifdef TARGET_64BIT_DEFAULT | |
191 | #define TARGET_64BIT 1 | |
192 | #else | |
193 | #define TARGET_64BIT 0 | |
194 | #endif | |
195 | #endif | |
25f94bb5 | 196 | |
f7746310 SC |
197 | #define TARGET_386 (ix86_cpu == PROCESSOR_I386) |
198 | #define TARGET_486 (ix86_cpu == PROCESSOR_I486) | |
199 | #define TARGET_PENTIUM (ix86_cpu == PROCESSOR_PENTIUM) | |
3a0433fd | 200 | #define TARGET_PENTIUMPRO (ix86_cpu == PROCESSOR_PENTIUMPRO) |
a269a03c | 201 | #define TARGET_K6 (ix86_cpu == PROCESSOR_K6) |
309ada50 | 202 | #define TARGET_ATHLON (ix86_cpu == PROCESSOR_ATHLON) |
b4e89e2d | 203 | #define TARGET_PENTIUM4 (ix86_cpu == PROCESSOR_PENTIUM4) |
a269a03c JC |
204 | |
205 | #define CPUMASK (1 << ix86_cpu) | |
206 | extern const int x86_use_leave, x86_push_memory, x86_zero_extend_with_and; | |
207 | extern const int x86_use_bit_test, x86_cmove, x86_deep_branch; | |
ef6257cd | 208 | extern const int x86_branch_hints, x86_unroll_strlen; |
e075ae69 RH |
209 | extern const int x86_double_with_add, x86_partial_reg_stall, x86_movx; |
210 | extern const int x86_use_loop, x86_use_fiop, x86_use_mov0; | |
211 | extern const int x86_use_cltd, x86_read_modify_write; | |
212 | extern const int x86_read_modify, x86_split_long_moves; | |
f90800f8 | 213 | extern const int x86_promote_QImode, x86_single_stringop; |
d9f32422 | 214 | extern const int x86_himode_math, x86_qimode_math, x86_promote_qi_regs; |
0b5107cf | 215 | extern const int x86_promote_hi_regs, x86_integer_DFmode_moves; |
bdeb029c | 216 | extern const int x86_add_esp_4, x86_add_esp_8, x86_sub_esp_4, x86_sub_esp_8; |
0b5107cf | 217 | extern const int x86_partial_reg_dependency, x86_memory_mismatch_stall; |
c6036a37 JH |
218 | extern const int x86_accumulate_outgoing_args, x86_prologue_using_move; |
219 | extern const int x86_epilogue_using_move; | |
a269a03c JC |
220 | |
221 | #define TARGET_USE_LEAVE (x86_use_leave & CPUMASK) | |
222 | #define TARGET_PUSH_MEMORY (x86_push_memory & CPUMASK) | |
223 | #define TARGET_ZERO_EXTEND_WITH_AND (x86_zero_extend_with_and & CPUMASK) | |
224 | #define TARGET_USE_BIT_TEST (x86_use_bit_test & CPUMASK) | |
225 | #define TARGET_UNROLL_STRLEN (x86_unroll_strlen & CPUMASK) | |
0644b628 JH |
226 | /* For sane SSE instruction set generation we need fcomi instruction. It is |
227 | safe to enable all CMOVE instructions. */ | |
228 | #define TARGET_CMOVE ((x86_cmove & (1 << ix86_arch)) || TARGET_SSE) | |
a269a03c | 229 | #define TARGET_DEEP_BRANCH_PREDICTION (x86_deep_branch & CPUMASK) |
ef6257cd | 230 | #define TARGET_BRANCH_PREDICTION_HINTS (x86_branch_hints & CPUMASK) |
a269a03c | 231 | #define TARGET_DOUBLE_WITH_ADD (x86_double_with_add & CPUMASK) |
0d7d98ee | 232 | #define TARGET_USE_SAHF ((x86_use_sahf & CPUMASK) && !TARGET_64BIT) |
e075ae69 RH |
233 | #define TARGET_MOVX (x86_movx & CPUMASK) |
234 | #define TARGET_PARTIAL_REG_STALL (x86_partial_reg_stall & CPUMASK) | |
235 | #define TARGET_USE_LOOP (x86_use_loop & CPUMASK) | |
236 | #define TARGET_USE_FIOP (x86_use_fiop & CPUMASK) | |
237 | #define TARGET_USE_MOV0 (x86_use_mov0 & CPUMASK) | |
238 | #define TARGET_USE_CLTD (x86_use_cltd & CPUMASK) | |
239 | #define TARGET_SPLIT_LONG_MOVES (x86_split_long_moves & CPUMASK) | |
240 | #define TARGET_READ_MODIFY_WRITE (x86_read_modify_write & CPUMASK) | |
241 | #define TARGET_READ_MODIFY (x86_read_modify & CPUMASK) | |
e9e80858 | 242 | #define TARGET_PROMOTE_QImode (x86_promote_QImode & CPUMASK) |
f90800f8 | 243 | #define TARGET_SINGLE_STRINGOP (x86_single_stringop & CPUMASK) |
d9f32422 JH |
244 | #define TARGET_QIMODE_MATH (x86_qimode_math & CPUMASK) |
245 | #define TARGET_HIMODE_MATH (x86_himode_math & CPUMASK) | |
246 | #define TARGET_PROMOTE_QI_REGS (x86_promote_qi_regs & CPUMASK) | |
247 | #define TARGET_PROMOTE_HI_REGS (x86_promote_hi_regs & CPUMASK) | |
bdeb029c JH |
248 | #define TARGET_ADD_ESP_4 (x86_add_esp_4 & CPUMASK) |
249 | #define TARGET_ADD_ESP_8 (x86_add_esp_8 & CPUMASK) | |
250 | #define TARGET_SUB_ESP_4 (x86_sub_esp_4 & CPUMASK) | |
251 | #define TARGET_SUB_ESP_8 (x86_sub_esp_8 & CPUMASK) | |
0b5107cf JH |
252 | #define TARGET_INTEGER_DFMODE_MOVES (x86_integer_DFmode_moves & CPUMASK) |
253 | #define TARGET_PARTIAL_REG_DEPENDENCY (x86_partial_reg_dependency & CPUMASK) | |
254 | #define TARGET_MEMORY_MISMATCH_STALL (x86_memory_mismatch_stall & CPUMASK) | |
c6036a37 JH |
255 | #define TARGET_PROLOGUE_USING_MOVE (x86_prologue_using_move & CPUMASK) |
256 | #define TARGET_EPILOGUE_USING_MOVE (x86_epilogue_using_move & CPUMASK) | |
a269a03c | 257 | |
8c9be447 | 258 | #define TARGET_STACK_PROBE (target_flags & MASK_STACK_PROBE) |
3b3c6a3f | 259 | |
79f05c19 JH |
260 | #define TARGET_ALIGN_STRINGOPS (!(target_flags & MASK_NO_ALIGN_STROPS)) |
261 | #define TARGET_INLINE_ALL_STRINGOPS (target_flags & MASK_INLINE_ALL_STROPS) | |
262 | ||
e075ae69 RH |
263 | #define ASSEMBLER_DIALECT ((target_flags & MASK_INTEL_SYNTAX) != 0) |
264 | ||
446988df JH |
265 | #define TARGET_SSE ((target_flags & (MASK_SSE | MASK_SSE2)) != 0) |
266 | #define TARGET_SSE2 ((target_flags & MASK_SSE2) != 0) | |
267 | #define TARGET_MIX_SSE_I387 ((target_flags & MASK_MIX_SSE_I387) != 0) | |
a7180f70 | 268 | #define TARGET_MMX ((target_flags & MASK_MMX) != 0) |
47f339cf BS |
269 | #define TARGET_3DNOW ((target_flags & MASK_3DNOW) != 0) |
270 | #define TARGET_3DNOW_A ((target_flags & MASK_3DNOW_A) != 0) | |
a7180f70 | 271 | |
8362f420 JH |
272 | #define TARGET_RED_ZONE (!(target_flags & MASK_NO_RED_ZONE)) |
273 | ||
e075ae69 | 274 | #define TARGET_SWITCHES \ |
047142d3 PT |
275 | { { "80387", MASK_80387, N_("Use hardware fp") }, \ |
276 | { "no-80387", -MASK_80387, N_("Do not use hardware fp") }, \ | |
277 | { "hard-float", MASK_80387, N_("Use hardware fp") }, \ | |
278 | { "soft-float", -MASK_80387, N_("Do not use hardware fp") }, \ | |
279 | { "no-soft-float", MASK_80387, N_("Use hardware fp") }, \ | |
280 | { "386", 0, N_("Same as -mcpu=i386") }, \ | |
281 | { "486", 0, N_("Same as -mcpu=i486") }, \ | |
282 | { "pentium", 0, N_("Same as -mcpu=pentium") }, \ | |
283 | { "pentiumpro", 0, N_("Same as -mcpu=pentiumpro") }, \ | |
284 | { "rtd", MASK_RTD, \ | |
285 | N_("Alternate calling convention") }, \ | |
286 | { "no-rtd", -MASK_RTD, \ | |
287 | N_("Use normal calling convention") }, \ | |
e075ae69 | 288 | { "align-double", MASK_ALIGN_DOUBLE, \ |
047142d3 | 289 | N_("Align some doubles on dword boundary") }, \ |
e075ae69 | 290 | { "no-align-double", -MASK_ALIGN_DOUBLE, \ |
047142d3 | 291 | N_("Align doubles on word boundary") }, \ |
e075ae69 | 292 | { "svr3-shlib", MASK_SVR3_SHLIB, \ |
047142d3 | 293 | N_("Uninitialized locals in .bss") }, \ |
e075ae69 | 294 | { "no-svr3-shlib", -MASK_SVR3_SHLIB, \ |
047142d3 | 295 | N_("Uninitialized locals in .data") }, \ |
e075ae69 | 296 | { "ieee-fp", MASK_IEEE_FP, \ |
047142d3 | 297 | N_("Use IEEE math for fp comparisons") }, \ |
e075ae69 | 298 | { "no-ieee-fp", -MASK_IEEE_FP, \ |
047142d3 | 299 | N_("Do not use IEEE math for fp comparisons") }, \ |
e075ae69 | 300 | { "fp-ret-in-387", MASK_FLOAT_RETURNS, \ |
047142d3 | 301 | N_("Return values of functions in FPU registers") }, \ |
e075ae69 | 302 | { "no-fp-ret-in-387", -MASK_FLOAT_RETURNS , \ |
047142d3 | 303 | N_("Do not return values of functions in FPU registers")}, \ |
e075ae69 | 304 | { "no-fancy-math-387", MASK_NO_FANCY_MATH_387, \ |
047142d3 | 305 | N_("Do not generate sin, cos, sqrt for FPU") }, \ |
e075ae69 | 306 | { "fancy-math-387", -MASK_NO_FANCY_MATH_387, \ |
047142d3 | 307 | N_("Generate sin, cos, sqrt for FPU")}, \ |
e075ae69 | 308 | { "omit-leaf-frame-pointer", MASK_OMIT_LEAF_FRAME_POINTER, \ |
047142d3 | 309 | N_("Omit the frame pointer in leaf functions") }, \ |
e075ae69 RH |
310 | { "no-omit-leaf-frame-pointer",-MASK_OMIT_LEAF_FRAME_POINTER, "" }, \ |
311 | { "debug-addr", MASK_DEBUG_ADDR, 0 /* undocumented */ }, \ | |
312 | { "no-debug-addr", -MASK_DEBUG_ADDR, 0 /* undocumented */ }, \ | |
313 | { "debug-arg", MASK_DEBUG_ARG, 0 /* undocumented */ }, \ | |
314 | { "no-debug-arg", -MASK_DEBUG_ARG, 0 /* undocumented */ }, \ | |
047142d3 PT |
315 | { "stack-arg-probe", MASK_STACK_PROBE, \ |
316 | N_("Enable stack probing") }, \ | |
e075ae69 RH |
317 | { "no-stack-arg-probe", -MASK_STACK_PROBE, "" }, \ |
318 | { "windows", 0, 0 /* undocumented */ }, \ | |
319 | { "dll", 0, 0 /* undocumented */ }, \ | |
320 | { "intel-syntax", MASK_INTEL_SYNTAX, \ | |
047142d3 | 321 | N_("Emit Intel syntax assembler opcodes") }, \ |
e075ae69 | 322 | { "no-intel-syntax", -MASK_INTEL_SYNTAX, "" }, \ |
79f05c19 | 323 | { "align-stringops", -MASK_NO_ALIGN_STROPS, \ |
047142d3 | 324 | N_("Align destination of the string operations") }, \ |
79f05c19 | 325 | { "no-align-stringops", MASK_NO_ALIGN_STROPS, \ |
047142d3 | 326 | N_("Do not align destination of the string operations") }, \ |
4be2e5d9 | 327 | { "inline-all-stringops", MASK_INLINE_ALL_STROPS, \ |
047142d3 | 328 | N_("Inline all known string operations") }, \ |
79f05c19 | 329 | { "no-inline-all-stringops", -MASK_INLINE_ALL_STROPS, \ |
047142d3 | 330 | N_("Do not inline all known string operations") }, \ |
f73ad30e | 331 | { "push-args", -MASK_NO_PUSH_ARGS, \ |
047142d3 | 332 | N_("Use push instructions to save outgoing arguments") }, \ |
053f1126 | 333 | { "no-push-args", MASK_NO_PUSH_ARGS, \ |
047142d3 | 334 | N_("Do not use push instructions to save outgoing arguments") }, \ |
f73ad30e | 335 | { "accumulate-outgoing-args", MASK_ACCUMULATE_OUTGOING_ARGS, \ |
047142d3 | 336 | N_("Use push instructions to save outgoing arguments") }, \ |
d3fe11e6 | 337 | { "no-accumulate-outgoing-args",MASK_NO_ACCUMULATE_OUTGOING_ARGS, \ |
047142d3 PT |
338 | N_("Do not use push instructions to save outgoing arguments") }, \ |
339 | { "mmx", MASK_MMX, N_("Support MMX builtins") }, \ | |
340 | { "no-mmx", -MASK_MMX, \ | |
341 | N_("Do not support MMX builtins") }, \ | |
47f339cf BS |
342 | { "3dnow", MASK_3DNOW, \ |
343 | N_("Support 3DNow! builtins") }, \ | |
344 | { "no-3dnow", -MASK_3DNOW, \ | |
345 | N_("Do not support 3DNow! builtins") }, \ | |
047142d3 | 346 | { "sse", MASK_SSE, \ |
446988df | 347 | N_("Support MMX and SSE builtins and code generation") }, \ |
a7180f70 | 348 | { "no-sse", -MASK_SSE, \ |
446988df JH |
349 | N_("Do not support MMX and SSE builtins and code generation") }, \ |
350 | { "sse2", MASK_SSE2, \ | |
351 | N_("Support MMX, SSE and SSE2 builtins and code generation") }, \ | |
352 | { "no-sse2", -MASK_SSE2, \ | |
353 | N_("Do not support MMX, SSE and SSE2 builtins and code generation") }, \ | |
354 | { "mix-sse-i387", MASK_MIX_SSE_I387, \ | |
355 | N_("Use both SSE and i387 instruction sets for floating point arithmetics") },\ | |
2c36d070 | 356 | { "no-mix-sse-i387", -MASK_MIX_SSE_I387, \ |
4cba3b67 | 357 | N_("Do not use both SSE and i387 instruction sets for floating point arithmetics") },\ |
2b589241 JH |
358 | { "128bit-long-double", MASK_128BIT_LONG_DOUBLE, \ |
359 | N_("sizeof(long double) is 16.") }, \ | |
360 | { "96bit-long-double", -MASK_128BIT_LONG_DOUBLE, \ | |
361 | N_("sizeof(long double) is 12.") }, \ | |
25f94bb5 JH |
362 | { "64", MASK_64BIT, \ |
363 | N_("Generate 64bit x86-64 code") }, \ | |
364 | { "32", -MASK_64BIT, \ | |
365 | N_("Generate 32bit i386 code") }, \ | |
8362f420 JH |
366 | { "red-zone", -MASK_NO_RED_ZONE, \ |
367 | N_("Use red-zone in the x86-64 code") }, \ | |
368 | { "no-red-zone", MASK_NO_RED_ZONE, \ | |
4cba3b67 | 369 | N_("Do not use red-zone in the x86-64 code") }, \ |
e075ae69 RH |
370 | SUBTARGET_SWITCHES \ |
371 | { "", TARGET_DEFAULT, 0 }} | |
241e1a89 | 372 | |
25f94bb5 JH |
373 | #ifdef TARGET_64BIT_DEFAULT |
374 | #define TARGET_DEFAULT (MASK_64BIT | TARGET_SUBTARGET_DEFAULT) | |
375 | #else | |
376 | #define TARGET_DEFAULT TARGET_SUBTARGET_DEFAULT | |
377 | #endif | |
378 | ||
d4ba09c0 SC |
379 | /* Which processor to schedule for. The cpu attribute defines a list that |
380 | mirrors this list, so changes to i386.md must be made at the same time. */ | |
381 | ||
241e1a89 | 382 | enum processor_type |
e075ae69 RH |
383 | { |
384 | PROCESSOR_I386, /* 80386 */ | |
241e1a89 SC |
385 | PROCESSOR_I486, /* 80486DX, 80486SX, 80486DX[24] */ |
386 | PROCESSOR_PENTIUM, | |
a269a03c | 387 | PROCESSOR_PENTIUMPRO, |
e075ae69 | 388 | PROCESSOR_K6, |
309ada50 | 389 | PROCESSOR_ATHLON, |
b4e89e2d | 390 | PROCESSOR_PENTIUM4, |
e075ae69 RH |
391 | PROCESSOR_max |
392 | }; | |
241e1a89 | 393 | |
e42ea7f9 | 394 | extern enum processor_type ix86_cpu; |
241e1a89 | 395 | |
bcd86433 | 396 | extern int ix86_arch; |
241e1a89 | 397 | |
f5316dfe MM |
398 | /* This macro is similar to `TARGET_SWITCHES' but defines names of |
399 | command options that have values. Its definition is an | |
400 | initializer with a subgrouping for each command option. | |
401 | ||
402 | Each subgrouping contains a string constant, that defines the | |
403 | fixed part of the option name, and the address of a variable. The | |
404 | variable, type `char *', is set to the variable part of the given | |
405 | option if the fixed part matches. The actual option name is made | |
406 | by appending `-m' to the specified name. */ | |
e075ae69 RH |
407 | #define TARGET_OPTIONS \ |
408 | { { "cpu=", &ix86_cpu_string, \ | |
047142d3 | 409 | N_("Schedule code for given CPU")}, \ |
e075ae69 | 410 | { "arch=", &ix86_arch_string, \ |
047142d3 | 411 | N_("Generate code for given CPU")}, \ |
e075ae69 | 412 | { "regparm=", &ix86_regparm_string, \ |
047142d3 | 413 | N_("Number of registers used to pass integer arguments") }, \ |
e075ae69 | 414 | { "align-loops=", &ix86_align_loops_string, \ |
047142d3 | 415 | N_("Loop code aligned to this power of 2") }, \ |
e075ae69 | 416 | { "align-jumps=", &ix86_align_jumps_string, \ |
047142d3 | 417 | N_("Jump targets are aligned to this power of 2") }, \ |
e075ae69 | 418 | { "align-functions=", &ix86_align_funcs_string, \ |
047142d3 | 419 | N_("Function starts are aligned to this power of 2") }, \ |
e075ae69 RH |
420 | { "preferred-stack-boundary=", \ |
421 | &ix86_preferred_stack_boundary_string, \ | |
047142d3 | 422 | N_("Attempt to keep stack aligned to this power of 2") }, \ |
e075ae69 | 423 | { "branch-cost=", &ix86_branch_cost_string, \ |
047142d3 | 424 | N_("Branches are this expensive (1-5, arbitrary units)") }, \ |
6189a572 JH |
425 | { "cmodel=", &ix86_cmodel_string, \ |
426 | N_("Use given x86-64 code model") }, \ | |
e075ae69 | 427 | SUBTARGET_OPTIONS \ |
b08de47e | 428 | } |
f5316dfe MM |
429 | |
430 | /* Sometimes certain combinations of command options do not make | |
431 | sense on a particular target machine. You can define a macro | |
432 | `OVERRIDE_OPTIONS' to take account of this. This macro, if | |
433 | defined, is executed once just after all the command options have | |
434 | been parsed. | |
435 | ||
436 | Don't use this macro to turn on various extra optimizations for | |
437 | `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */ | |
438 | ||
439 | #define OVERRIDE_OPTIONS override_options () | |
440 | ||
441 | /* These are meant to be redefined in the host dependent files */ | |
95393dfd | 442 | #define SUBTARGET_SWITCHES |
f5316dfe | 443 | #define SUBTARGET_OPTIONS |
95393dfd | 444 | |
d4ba09c0 | 445 | /* Define this to change the optimizations performed by default. */ |
c6aded7c | 446 | #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) optimization_options(LEVEL,SIZE) |
d4ba09c0 | 447 | |
241e1a89 SC |
448 | /* Specs for the compiler proper */ |
449 | ||
628714d8 RK |
450 | #ifndef CC1_CPU_SPEC |
451 | #define CC1_CPU_SPEC "\ | |
241e1a89 | 452 | %{!mcpu*: \ |
4a88a060 | 453 | %{m386:-mcpu=i386 \ |
3f0e0fa2 | 454 | %n`-m386' is deprecated. Use `-march=i386' or `-mcpu=i386' instead.\n} \ |
4a88a060 | 455 | %{m486:-mcpu=i486 \ |
3f0e0fa2 | 456 | %n`-m486' is deprecated. Use `-march=i486' or `-mcpu=i486' instead.\n} \ |
4a88a060 | 457 | %{mpentium:-mcpu=pentium \ |
3f0e0fa2 | 458 | %n`-mpentium' is deprecated. Use `-march=pentium' or `-mcpu=pentium' instead.\n} \ |
4a88a060 | 459 | %{mpentiumpro:-mcpu=pentiumpro \ |
3f0e0fa2 | 460 | %n`-mpentiumpro' is deprecated. Use `-march=pentiumpro' or `-mcpu=pentiumpro' instead.\n}}" |
241e1a89 | 461 | #endif |
c98f8742 | 462 | \f |
84b77fba | 463 | #ifndef CPP_CPU_DEFAULT_SPEC |
d5c65c96 | 464 | #if TARGET_CPU_DEFAULT == 1 |
5a6ee819 RH |
465 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_i486__" |
466 | #endif | |
da594c94 | 467 | #if TARGET_CPU_DEFAULT == 2 |
0d97fd9e | 468 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_i586__ -D__tune_pentium__" |
5a6ee819 | 469 | #endif |
da594c94 | 470 | #if TARGET_CPU_DEFAULT == 3 |
0d97fd9e | 471 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_i686__ -D__tune_pentiumpro__" |
da594c94 | 472 | #endif |
5a6ee819 RH |
473 | #if TARGET_CPU_DEFAULT == 4 |
474 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_k6__" | |
da594c94 | 475 | #endif |
309ada50 JH |
476 | #if TARGET_CPU_DEFAULT == 5 |
477 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_athlon__" | |
478 | #endif | |
b4e89e2d JH |
479 | #if TARGET_CPU_DEFAULT == 6 |
480 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_pentium4__" | |
481 | #endif | |
5a6ee819 RH |
482 | #ifndef CPP_CPU_DEFAULT_SPEC |
483 | #define CPP_CPU_DEFAULT_SPEC "-D__tune_i386__" | |
84b77fba JW |
484 | #endif |
485 | #endif /* CPP_CPU_DEFAULT_SPEC */ | |
33c1d53a | 486 | |
14f73b5a JH |
487 | #ifdef TARGET_BI_ARCH |
488 | #define NO_BUILTIN_SIZE_TYPE | |
489 | #define NO_BUILTIN_PTRDIFF_TYPE | |
490 | #endif | |
491 | ||
0c2dc519 JH |
492 | #ifdef NO_BUILTIN_SIZE_TYPE |
493 | #define CPP_CPU32_SIZE_TYPE_SPEC \ | |
494 | " -D__SIZE_TYPE__=unsigned\\ int -D__PTRDIFF_TYPE__=int" | |
495 | #define CPP_CPU64_SIZE_TYPE_SPEC \ | |
496 | " -D__SIZE_TYPE__=unsigned\\ long\\ int -D__PTRDIFF_TYPE__=long\\ int" | |
497 | #else | |
498 | #define CPP_CPU32_SIZE_TYPE_SPEC "" | |
499 | #define CPP_CPU64_SIZE_TYPE_SPEC "" | |
500 | #endif | |
501 | ||
502 | #define CPP_CPU32_SPEC \ | |
503 | "-Acpu=i386 -Amachine=i386 %{!ansi:%{!std=c*:%{!std=i*:-Di386}}} -D__i386 \ | |
504 | -D__i386__ %(cpp_cpu32sizet)" | |
505 | ||
506 | #define CPP_CPU64_SPEC \ | |
507 | "-Acpu=x86_64 -Amachine=x86_64 -D__x86_64 -D__x86_64__ %(cpp_cpu64sizet)" | |
508 | ||
509 | #define CPP_CPUCOMMON_SPEC "\ | |
5a6ee819 RH |
510 | %{march=i386:%{!mcpu*:-D__tune_i386__ }}\ |
511 | %{march=i486:-D__i486 -D__i486__ %{!mcpu*:-D__tune_i486__ }}\ | |
0d97fd9e RH |
512 | %{march=pentium|march=i586:-D__i586 -D__i586__ -D__pentium -D__pentium__ \ |
513 | %{!mcpu*:-D__tune_i586__ -D__tune_pentium__ }}\ | |
514 | %{march=pentiumpro|march=i686:-D__i686 -D__i686__ \ | |
515 | -D__pentiumpro -D__pentiumpro__ \ | |
516 | %{!mcpu*:-D__tune_i686__ -D__tune_pentiumpro__ }}\ | |
5a6ee819 | 517 | %{march=k6:-D__k6 -D__k6__ %{!mcpu*:-D__tune_k6__ }}\ |
309ada50 | 518 | %{march=athlon:-D__athlon -D__athlon__ %{!mcpu*:-D__tune_athlon__ }}\ |
0c2dc519 | 519 | %{march=pentium4:-D__pentium4 -D__pentium4__ %{!mcpu*:-D__tune_pentium4__ }}\ |
5a6ee819 RH |
520 | %{m386|mcpu=i386:-D__tune_i386__ }\ |
521 | %{m486|mcpu=i486:-D__tune_i486__ }\ | |
0d97fd9e RH |
522 | %{mpentium|mcpu=pentium|mcpu=i586:-D__tune_i586__ -D__tune_pentium__ }\ |
523 | %{mpentiumpro|mcpu=pentiumpro|mcpu=i686:-D__tune_i686__ -D__tune_pentiumpro__ }\ | |
5a6ee819 | 524 | %{mcpu=k6:-D__tune_k6__ }\ |
309ada50 | 525 | %{mcpu=athlon:-D__tune_athlon__ }\ |
b4e89e2d | 526 | %{mcpu=pentium4:-D__tune_pentium4__ }\ |
5a6ee819 | 527 | %{!march*:%{!mcpu*:%{!m386:%{!m486:%{!mpentium*:%(cpp_cpu_default)}}}}}" |
0c2dc519 JH |
528 | |
529 | #ifndef CPP_CPU_SPEC | |
530 | #ifdef TARGET_BI_ARCH | |
531 | #ifdef TARGET_64BIT_DEFAULT | |
532 | #define CPP_CPU_SPEC "%{m32:%(cpp_cpu32)}%{!m32:%(cpp_cpu64)} %(cpp_cpucommon)" | |
533 | #else | |
534 | #define CPP_CPU_SPEC "%{m64:%(cpp_cpu64)}%{!m64:%(cpp_cpu32)} %(cpp_cpucommon)" | |
535 | #endif | |
536 | #else | |
537 | #ifdef TARGET_64BIT_DEFAULT | |
538 | #define CPP_CPU_SPEC "%(cpp_cpu64) %(cpp_cpucommon)" | |
539 | #else | |
540 | #define CPP_CPU_SPEC "%(cpp_cpu32) %(cpp_cpucommon)" | |
541 | #endif | |
542 | #endif | |
84b77fba | 543 | #endif |
bcd86433 | 544 | |
628714d8 | 545 | #ifndef CC1_SPEC |
8015b78d | 546 | #define CC1_SPEC "%(cc1_cpu) " |
628714d8 RK |
547 | #endif |
548 | ||
549 | /* This macro defines names of additional specifications to put in the | |
550 | specs that can be used in various specifications like CC1_SPEC. Its | |
551 | definition is an initializer with a subgrouping for each command option. | |
bcd86433 SC |
552 | |
553 | Each subgrouping contains a string constant, that defines the | |
554 | specification name, and a string constant that used by the GNU CC driver | |
555 | program. | |
556 | ||
557 | Do not define this macro if it does not need to do anything. */ | |
558 | ||
559 | #ifndef SUBTARGET_EXTRA_SPECS | |
560 | #define SUBTARGET_EXTRA_SPECS | |
561 | #endif | |
562 | ||
563 | #define EXTRA_SPECS \ | |
84b77fba | 564 | { "cpp_cpu_default", CPP_CPU_DEFAULT_SPEC }, \ |
bcd86433 | 565 | { "cpp_cpu", CPP_CPU_SPEC }, \ |
0c2dc519 JH |
566 | { "cpp_cpu32", CPP_CPU32_SPEC }, \ |
567 | { "cpp_cpu64", CPP_CPU64_SPEC }, \ | |
568 | { "cpp_cpu32sizet", CPP_CPU32_SIZE_TYPE_SPEC }, \ | |
569 | { "cpp_cpu64sizet", CPP_CPU64_SIZE_TYPE_SPEC }, \ | |
570 | { "cpp_cpucommon", CPP_CPUCOMMON_SPEC }, \ | |
628714d8 | 571 | { "cc1_cpu", CC1_CPU_SPEC }, \ |
bcd86433 SC |
572 | SUBTARGET_EXTRA_SPECS |
573 | \f | |
c98f8742 JVA |
574 | /* target machine storage layout */ |
575 | ||
2b589241 JH |
576 | /* Define for XFmode or TFmode extended real floating point support. |
577 | This will automatically cause REAL_ARITHMETIC to be defined. | |
578 | ||
579 | The XFmode is specified by i386 ABI, while TFmode may be faster | |
580 | due to alignment and simplifications in the address calculations. | |
581 | */ | |
582 | #define LONG_DOUBLE_TYPE_SIZE (TARGET_128BIT_LONG_DOUBLE ? 128 : 96) | |
583 | #define MAX_LONG_DOUBLE_TYPE_SIZE 128 | |
65d9c0ab JH |
584 | #ifdef __x86_64__ |
585 | #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 | |
586 | #else | |
587 | #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 96 | |
588 | #endif | |
2b589241 JH |
589 | /* Tell real.c that this is the 80-bit Intel extended float format |
590 | packaged in a 128-bit or 96bit entity. */ | |
23c108af | 591 | #define INTEL_EXTENDED_IEEE_FORMAT 1 |
2b589241 | 592 | |
0038aea6 | 593 | |
65d9c0ab JH |
594 | #define SHORT_TYPE_SIZE 16 |
595 | #define INT_TYPE_SIZE 32 | |
596 | #define FLOAT_TYPE_SIZE 32 | |
597 | #define LONG_TYPE_SIZE BITS_PER_WORD | |
2faf6b96 | 598 | #define MAX_WCHAR_TYPE_SIZE 32 |
65d9c0ab JH |
599 | #define DOUBLE_TYPE_SIZE 64 |
600 | #define LONG_LONG_TYPE_SIZE 64 | |
601 | ||
0c2dc519 JH |
602 | #if defined (TARGET_BI_ARCH) || defined (TARGET_64BIT_DEFAULT) |
603 | #define MAX_BITS_PER_WORD 64 | |
604 | #define MAX_LONG_TYPE_SIZE 64 | |
605 | #else | |
606 | #define MAX_BITS_PER_WORD 32 | |
607 | #define MAX_LONG_TYPE_SIZE 32 | |
608 | #endif | |
609 | ||
0038aea6 JVA |
610 | /* Define if you don't want extended real, but do want to use the |
611 | software floating point emulator for REAL_ARITHMETIC and | |
612 | decimal <-> binary conversion. */ | |
613 | /* #define REAL_ARITHMETIC */ | |
614 | ||
c98f8742 JVA |
615 | /* Define this if most significant byte of a word is the lowest numbered. */ |
616 | /* That is true on the 80386. */ | |
617 | ||
618 | #define BITS_BIG_ENDIAN 0 | |
619 | ||
620 | /* Define this if most significant byte of a word is the lowest numbered. */ | |
621 | /* That is not true on the 80386. */ | |
622 | #define BYTES_BIG_ENDIAN 0 | |
623 | ||
624 | /* Define this if most significant word of a multiword number is the lowest | |
625 | numbered. */ | |
626 | /* Not true for 80386 */ | |
627 | #define WORDS_BIG_ENDIAN 0 | |
628 | ||
b4ac57ab | 629 | /* number of bits in an addressable storage unit */ |
c98f8742 JVA |
630 | #define BITS_PER_UNIT 8 |
631 | ||
632 | /* Width in bits of a "word", which is the contents of a machine register. | |
633 | Note that this is not necessarily the width of data type `int'; | |
634 | if using 16-bit ints on a 80386, this would still be 32. | |
635 | But on a machine with 16-bit registers, this would be 16. */ | |
65d9c0ab | 636 | #define BITS_PER_WORD (TARGET_64BIT ? 64 : 32) |
c98f8742 JVA |
637 | |
638 | /* Width of a word, in units (bytes). */ | |
65d9c0ab JH |
639 | #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4) |
640 | #define MIN_UNITS_PER_WORD 4 | |
c98f8742 JVA |
641 | |
642 | /* Width in bits of a pointer. | |
643 | See also the macro `Pmode' defined below. */ | |
65d9c0ab | 644 | #define POINTER_SIZE BITS_PER_WORD |
c98f8742 JVA |
645 | |
646 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
65d9c0ab | 647 | #define PARM_BOUNDARY BITS_PER_WORD |
c98f8742 | 648 | |
e075ae69 | 649 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ |
65d9c0ab | 650 | #define STACK_BOUNDARY BITS_PER_WORD |
c98f8742 | 651 | |
3af4bd89 JH |
652 | /* Boundary (in *bits*) on which the stack pointer preferrs to be |
653 | aligned; the compiler cannot rely on having this alignment. */ | |
e075ae69 | 654 | #define PREFERRED_STACK_BOUNDARY ix86_preferred_stack_boundary |
65954bd8 | 655 | |
1d482056 RH |
656 | /* As of July 2001, many runtimes to not align the stack properly when |
657 | entering main. This causes expand_main_function to forcably align | |
658 | the stack, which results in aligned frames for functions called from | |
659 | main, though it does nothing for the alignment of main itself. */ | |
660 | #define FORCE_PREFERRED_STACK_BOUNDARY_IN_MAIN \ | |
14f73b5a | 661 | (ix86_preferred_stack_boundary > STACK_BOUNDARY && !TARGET_64BIT) |
1d482056 | 662 | |
e075ae69 | 663 | /* Allocation boundary for the code of a function. */ |
3e18fdf6 | 664 | #define FUNCTION_BOUNDARY 16 |
c98f8742 JVA |
665 | |
666 | /* Alignment of field after `int : 0' in a structure. */ | |
667 | ||
65d9c0ab | 668 | #define EMPTY_FIELD_BOUNDARY BITS_PER_WORD |
c98f8742 JVA |
669 | |
670 | /* Minimum size in bits of the largest boundary to which any | |
671 | and all fundamental data types supported by the hardware | |
672 | might need to be aligned. No data type wants to be aligned | |
17f24ff0 JH |
673 | rounder than this. |
674 | ||
3e18fdf6 | 675 | Pentium+ preferrs DFmode values to be aligned to 64 bit boundary |
17f24ff0 JH |
676 | and Pentium Pro XFmode values at 128 bit boundaries. */ |
677 | ||
678 | #define BIGGEST_ALIGNMENT 128 | |
679 | ||
a7180f70 BS |
680 | /* Decide whether a variable of mode MODE must be 128 bit aligned. */ |
681 | #define ALIGN_MODE_128(MODE) \ | |
2b589241 JH |
682 | ((MODE) == XFmode || (MODE) == TFmode || ((MODE) == TImode) \ |
683 | || (MODE) == V4SFmode || (MODE) == V4SImode) | |
a7180f70 | 684 | |
17f24ff0 | 685 | /* The published ABIs say that doubles should be aligned on word |
6fc605d8 ZW |
686 | boundaries, so lower the aligment for structure fields unless |
687 | -malign-double is set. */ | |
688 | /* BIGGEST_FIELD_ALIGNMENT is also used in libobjc, where it must be | |
689 | constant. Use the smaller value in that context. */ | |
690 | #ifndef IN_TARGET_LIBS | |
65d9c0ab | 691 | #define BIGGEST_FIELD_ALIGNMENT (TARGET_64BIT ? 128 : (TARGET_ALIGN_DOUBLE ? 64 : 32)) |
6fc605d8 ZW |
692 | #else |
693 | #define BIGGEST_FIELD_ALIGNMENT 32 | |
694 | #endif | |
c98f8742 | 695 | |
e5e8a8bf | 696 | /* If defined, a C expression to compute the alignment given to a |
a7180f70 | 697 | constant that is being placed in memory. EXP is the constant |
e5e8a8bf JW |
698 | and ALIGN is the alignment that the object would ordinarily have. |
699 | The value of this macro is used instead of that alignment to align | |
700 | the object. | |
701 | ||
702 | If this macro is not defined, then ALIGN is used. | |
703 | ||
704 | The typical use of this macro is to increase alignment for string | |
705 | constants to be word aligned so that `strcpy' calls that copy | |
706 | constants can be done inline. */ | |
707 | ||
a7180f70 | 708 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) ix86_constant_alignment (EXP, ALIGN) |
d4ba09c0 | 709 | |
8a022443 JW |
710 | /* If defined, a C expression to compute the alignment for a static |
711 | variable. TYPE is the data type, and ALIGN is the alignment that | |
712 | the object would ordinarily have. The value of this macro is used | |
713 | instead of that alignment to align the object. | |
714 | ||
715 | If this macro is not defined, then ALIGN is used. | |
716 | ||
717 | One use of this macro is to increase alignment of medium-size | |
718 | data to make it all fit in fewer cache lines. Another is to | |
719 | cause character arrays to be word-aligned so that `strcpy' calls | |
720 | that copy constants to character arrays can be done inline. */ | |
721 | ||
a7180f70 | 722 | #define DATA_ALIGNMENT(TYPE, ALIGN) ix86_data_alignment (TYPE, ALIGN) |
d16790f2 JW |
723 | |
724 | /* If defined, a C expression to compute the alignment for a local | |
725 | variable. TYPE is the data type, and ALIGN is the alignment that | |
726 | the object would ordinarily have. The value of this macro is used | |
727 | instead of that alignment to align the object. | |
728 | ||
729 | If this macro is not defined, then ALIGN is used. | |
730 | ||
731 | One use of this macro is to increase alignment of medium-size | |
732 | data to make it all fit in fewer cache lines. */ | |
733 | ||
a7180f70 | 734 | #define LOCAL_ALIGNMENT(TYPE, ALIGN) ix86_local_alignment (TYPE, ALIGN) |
8a022443 | 735 | |
53c17031 JH |
736 | /* If defined, a C expression that gives the alignment boundary, in |
737 | bits, of an argument with the specified mode and type. If it is | |
738 | not defined, `PARM_BOUNDARY' is used for all arguments. */ | |
739 | ||
740 | #define FUNCTION_ARG_BOUNDARY(MODE,TYPE) ix86_function_arg_boundary (MODE, TYPE) | |
741 | ||
b4ac57ab | 742 | /* Set this non-zero if move instructions will actually fail to work |
c98f8742 | 743 | when given unaligned data. */ |
b4ac57ab | 744 | #define STRICT_ALIGNMENT 0 |
c98f8742 JVA |
745 | |
746 | /* If bit field type is int, don't let it cross an int, | |
747 | and give entire struct the alignment of an int. */ | |
748 | /* Required on the 386 since it doesn't have bitfield insns. */ | |
749 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
c98f8742 JVA |
750 | \f |
751 | /* Standard register usage. */ | |
752 | ||
753 | /* This processor has special stack-like registers. See reg-stack.c | |
754 | for details. */ | |
755 | ||
756 | #define STACK_REGS | |
2b589241 JH |
757 | #define IS_STACK_MODE(mode) (mode==DFmode || mode==SFmode \ |
758 | || mode==XFmode || mode==TFmode) | |
c98f8742 JVA |
759 | |
760 | /* Number of actual hardware registers. | |
761 | The hardware registers are assigned numbers for the compiler | |
762 | from 0 to just below FIRST_PSEUDO_REGISTER. | |
763 | All registers that the compiler knows about must be given numbers, | |
764 | even those that are not normally considered general registers. | |
765 | ||
766 | In the 80386 we give the 8 general purpose registers the numbers 0-7. | |
767 | We number the floating point registers 8-15. | |
768 | Note that registers 0-7 can be accessed as a short or int, | |
769 | while only 0-3 may be used with byte `mov' instructions. | |
770 | ||
771 | Reg 16 does not correspond to any hardware register, but instead | |
772 | appears in the RTL as an argument pointer prior to reload, and is | |
773 | eliminated during reloading in favor of either the stack or frame | |
774 | pointer. */ | |
775 | ||
3f3f2124 | 776 | #define FIRST_PSEUDO_REGISTER 53 |
c98f8742 | 777 | |
3073d01c ML |
778 | /* Number of hardware registers that go into the DWARF-2 unwind info. |
779 | If not defined, equals FIRST_PSEUDO_REGISTER. */ | |
780 | ||
781 | #define DWARF_FRAME_REGISTERS 17 | |
782 | ||
c98f8742 JVA |
783 | /* 1 for registers that have pervasive standard uses |
784 | and are not available for the register allocator. | |
3f3f2124 JH |
785 | On the 80386, the stack pointer is such, as is the arg pointer. |
786 | ||
787 | The value is an mask - bit 1 is set for fixed registers | |
788 | for 32bit target, while 2 is set for fixed registers for 64bit. | |
789 | Proper value is computed in the CONDITIONAL_REGISTER_USAGE. | |
790 | */ | |
a7180f70 BS |
791 | #define FIXED_REGISTERS \ |
792 | /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ | |
3f3f2124 | 793 | { 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, \ |
a7180f70 | 794 | /*arg,flags,fpsr,dir,frame*/ \ |
3f3f2124 | 795 | 3, 3, 3, 3, 3, \ |
a7180f70 BS |
796 | /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
797 | 0, 0, 0, 0, 0, 0, 0, 0, \ | |
798 | /*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/ \ | |
3f3f2124 JH |
799 | 0, 0, 0, 0, 0, 0, 0, 0, \ |
800 | /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ | |
801 | 1, 1, 1, 1, 1, 1, 1, 1, \ | |
802 | /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ | |
803 | 1, 1, 1, 1, 1, 1, 1, 1} | |
804 | ||
c98f8742 JVA |
805 | |
806 | /* 1 for registers not available across function calls. | |
807 | These must include the FIXED_REGISTERS and also any | |
808 | registers that can be used without being saved. | |
809 | The latter must include the registers where values are returned | |
810 | and the register where structure-value addresses are passed. | |
3f3f2124 JH |
811 | Aside from that, you can include as many other registers as you like. |
812 | ||
813 | The value is an mask - bit 1 is set for call used | |
814 | for 32bit target, while 2 is set for call used for 64bit. | |
815 | Proper value is computed in the CONDITIONAL_REGISTER_USAGE. | |
816 | */ | |
a7180f70 BS |
817 | #define CALL_USED_REGISTERS \ |
818 | /*ax,dx,cx,bx,si,di,bp,sp,st,st1,st2,st3,st4,st5,st6,st7*/ \ | |
3f3f2124 | 819 | { 3, 3, 3, 0, 2, 2, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, \ |
a7180f70 | 820 | /*arg,flags,fpsr,dir,frame*/ \ |
3f3f2124 | 821 | 3, 3, 3, 3, 3, \ |
a7180f70 | 822 | /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
3f3f2124 | 823 | 3, 3, 3, 3, 3, 3, 3, 3, \ |
a7180f70 | 824 | /*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/ \ |
3f3f2124 JH |
825 | 3, 3, 3, 3, 3, 3, 3, 3, \ |
826 | /* r8, r9, r10, r11, r12, r13, r14, r15*/ \ | |
827 | 3, 3, 3, 3, 1, 1, 1, 1, \ | |
828 | /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ | |
829 | 3, 3, 3, 3, 3, 3, 3, 3} \ | |
c98f8742 | 830 | |
3b3c6a3f MM |
831 | /* Order in which to allocate registers. Each register must be |
832 | listed once, even those in FIXED_REGISTERS. List frame pointer | |
833 | late and fixed registers last. Note that, in general, we prefer | |
834 | registers listed in CALL_USED_REGISTERS, keeping the others | |
835 | available for storage of persistent values. | |
836 | ||
837 | Three different versions of REG_ALLOC_ORDER have been tried: | |
838 | ||
839 | If the order is edx, ecx, eax, ... it produces a slightly faster compiler, | |
840 | but slower code on simple functions returning values in eax. | |
841 | ||
842 | If the order is eax, ecx, edx, ... it causes reload to abort when compiling | |
843 | perl 4.036 due to not being able to create a DImode register (to hold a 2 | |
844 | word union). | |
845 | ||
846 | If the order is eax, edx, ecx, ... it produces better code for simple | |
847 | functions, and a slightly slower compiler. Users complained about the code | |
848 | generated by allocating edx first, so restore the 'natural' order of things. */ | |
849 | ||
a7180f70 | 850 | #define REG_ALLOC_ORDER \ |
3f3f2124 JH |
851 | /*ax,dx,cx,*/ \ |
852 | { 0, 1, 2, \ | |
853 | /* bx,si,di,bp,sp,*/ \ | |
854 | 3, 4, 5, 6, 7, \ | |
855 | /*r8,r9,r10,r11,*/ \ | |
856 | 37,38, 39, 40, \ | |
857 | /*r12,r15,r14,r13*/ \ | |
858 | 41, 44, 43, 42, \ | |
a7180f70 BS |
859 | /*xmm0,xmm1,xmm2,xmm3,xmm4,xmm5,xmm6,xmm7*/ \ |
860 | 21, 22, 23, 24, 25, 26, 27, 28, \ | |
3f3f2124 JH |
861 | /*xmm8,xmm9,xmm10,xmm11,xmm12,xmm13,xmm14,xmm15*/ \ |
862 | 45, 46, 47, 48, 49, 50, 51, 52, \ | |
266da7a2 JH |
863 | /*st,st1,st2,st3,st4,st5,st6,st7*/ \ |
864 | 8, 9, 10, 11, 12, 13, 14, 15, \ | |
3f3f2124 JH |
865 | /*,arg,cc,fpsr,dir,frame*/ \ |
866 | 16,17, 18, 19, 20, \ | |
a7180f70 BS |
867 | /*mmx0,mmx1,mmx2,mmx3,mmx4,mmx5,mmx6,mmx7*/ \ |
868 | 29, 30, 31, 32, 33, 34, 35, 36 } | |
f5316dfe | 869 | |
c98f8742 | 870 | /* Macro to conditionally modify fixed_regs/call_used_regs. */ |
a7180f70 BS |
871 | #define CONDITIONAL_REGISTER_USAGE \ |
872 | { \ | |
3f3f2124 JH |
873 | int i; \ |
874 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \ | |
875 | { \ | |
876 | fixed_regs[i] = (fixed_regs[i] & (TARGET_64BIT ? 2 : 1)) != 0; \ | |
877 | call_used_regs[i] = (call_used_regs[i] \ | |
878 | & (TARGET_64BIT ? 2 : 1)) != 0; \ | |
879 | } \ | |
a7180f70 BS |
880 | if (flag_pic) \ |
881 | { \ | |
882 | fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ | |
883 | call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ | |
884 | } \ | |
885 | if (! TARGET_MMX) \ | |
886 | { \ | |
887 | int i; \ | |
888 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \ | |
889 | if (TEST_HARD_REG_BIT (reg_class_contents[(int)MMX_REGS], i)) \ | |
890 | fixed_regs[i] = call_used_regs[i] = 1; \ | |
891 | } \ | |
892 | if (! TARGET_SSE) \ | |
893 | { \ | |
894 | int i; \ | |
895 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \ | |
896 | if (TEST_HARD_REG_BIT (reg_class_contents[(int)SSE_REGS], i)) \ | |
897 | fixed_regs[i] = call_used_regs[i] = 1; \ | |
898 | } \ | |
899 | if (! TARGET_80387 && ! TARGET_FLOAT_RETURNS_IN_80387) \ | |
900 | { \ | |
901 | int i; \ | |
902 | HARD_REG_SET x; \ | |
903 | COPY_HARD_REG_SET (x, reg_class_contents[(int)FLOAT_REGS]); \ | |
904 | for (i = 0; i < FIRST_PSEUDO_REGISTER; i++) \ | |
905 | if (TEST_HARD_REG_BIT (x, i)) \ | |
906 | fixed_regs[i] = call_used_regs[i] = 1; \ | |
907 | } \ | |
c98f8742 JVA |
908 | } |
909 | ||
910 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
911 | to hold something of mode MODE. | |
912 | This is ordinarily the length in words of a value of mode MODE | |
913 | but can be less for certain modes in special long registers. | |
914 | ||
915 | Actually there are no two word move instructions for consecutive | |
916 | registers. And only registers 0-3 may have mov byte instructions | |
917 | applied to them. | |
918 | */ | |
919 | ||
920 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
92d0fb09 JH |
921 | (FP_REGNO_P (REGNO) || SSE_REGNO_P (REGNO) || MMX_REGNO_P (REGNO) \ |
922 | ? (COMPLEX_MODE_P (MODE) ? 2 : 1) \ | |
2b589241 | 923 | : (MODE == TFmode \ |
92d0fb09 JH |
924 | ? (TARGET_64BIT ? 2 : 3) \ |
925 | : MODE == TCmode \ | |
926 | ? (TARGET_64BIT ? 4 : 6) \ | |
2b589241 | 927 | : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))) |
c98f8742 | 928 | |
a7180f70 | 929 | #define VALID_SSE_REG_MODE(MODE) \ |
446988df | 930 | ((MODE) == TImode || (MODE) == V4SFmode || (MODE) == V4SImode \ |
141e454b JH |
931 | || (MODE) == SFmode \ |
932 | || (TARGET_SSE2 && ((MODE) == DFmode || VALID_MMX_REG_MODE (MODE)))) | |
a7180f70 | 933 | |
47f339cf BS |
934 | #define VALID_MMX_REG_MODE_3DNOW(MODE) \ |
935 | ((MODE) == V2SFmode || (MODE) == SFmode) | |
936 | ||
a7180f70 BS |
937 | #define VALID_MMX_REG_MODE(MODE) \ |
938 | ((MODE) == DImode || (MODE) == V8QImode || (MODE) == V4HImode \ | |
939 | || (MODE) == V2SImode || (MODE) == SImode) | |
940 | ||
941 | #define VECTOR_MODE_SUPPORTED_P(MODE) \ | |
942 | (VALID_SSE_REG_MODE (MODE) && TARGET_SSE ? 1 \ | |
47f339cf BS |
943 | : VALID_MMX_REG_MODE (MODE) && TARGET_MMX ? 1 \ |
944 | : VALID_MMX_REG_MODE_3DNOW (MODE) && TARGET_3DNOW ? 1 : 0) | |
a7180f70 | 945 | |
a946dd00 JH |
946 | #define VALID_FP_MODE_P(mode) \ |
947 | ((mode) == SFmode || (mode) == DFmode || (mode) == TFmode \ | |
d2836273 | 948 | || (!TARGET_64BIT && (mode) == XFmode) \ |
a946dd00 | 949 | || (mode) == SCmode || (mode) == DCmode || (mode) == TCmode\ |
d2836273 | 950 | || (!TARGET_64BIT && (mode) == XCmode)) |
a946dd00 JH |
951 | |
952 | #define VALID_INT_MODE_P(mode) \ | |
953 | ((mode) == QImode || (mode) == HImode || (mode) == SImode \ | |
954 | || (mode) == DImode \ | |
955 | || (mode) == CQImode || (mode) == CHImode || (mode) == CSImode \ | |
956 | || (mode) == CDImode) | |
957 | ||
e075ae69 | 958 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */ |
48227a2c | 959 | |
a946dd00 JH |
960 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
961 | ix86_hard_regno_mode_ok (REGNO, MODE) | |
c98f8742 JVA |
962 | |
963 | /* Value is 1 if it is a good idea to tie two pseudo registers | |
964 | when one has mode MODE1 and one has mode MODE2. | |
965 | If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, | |
966 | for any hard reg, then this must be 0 for correct output. */ | |
967 | ||
95912252 RH |
968 | #define MODES_TIEABLE_P(MODE1, MODE2) \ |
969 | ((MODE1) == (MODE2) \ | |
d2836273 JH |
970 | || (((MODE1) == HImode || (MODE1) == SImode \ |
971 | || ((MODE1) == QImode \ | |
972 | && (TARGET_64BIT || !TARGET_PARTIAL_REG_STALL)) \ | |
973 | || ((MODE1) == DImode && TARGET_64BIT)) \ | |
974 | && ((MODE2) == HImode || (MODE2) == SImode \ | |
975 | || ((MODE1) == QImode \ | |
976 | && (TARGET_64BIT || !TARGET_PARTIAL_REG_STALL)) \ | |
977 | || ((MODE2) == DImode && TARGET_64BIT)))) | |
978 | ||
c98f8742 | 979 | |
e075ae69 | 980 | /* Specify the modes required to caller save a given hard regno. |
787dc842 | 981 | We do this on i386 to prevent flags from being saved at all. |
e075ae69 | 982 | |
787dc842 JH |
983 | Kill any attempts to combine saving of modes. */ |
984 | ||
985 | #define HARD_REGNO_CALLER_SAVE_MODE(REGNO, NREGS, MODE) \ | |
e075ae69 | 986 | (CC_REGNO_P (REGNO) ? VOIDmode \ |
787dc842 JH |
987 | : (MODE) == VOIDmode && (NREGS) != 1 ? VOIDmode \ |
988 | : (MODE) == VOIDmode ? choose_hard_reg_mode ((REGNO), (NREGS)) \ | |
989 | : (MODE) == HImode && !TARGET_PARTIAL_REG_STALL ? SImode \ | |
d2836273 JH |
990 | : (MODE) == QImode && (REGNO) >= 4 && !TARGET_64BIT ? SImode \ |
991 | : (MODE)) | |
c98f8742 JVA |
992 | /* Specify the registers used for certain standard purposes. |
993 | The values of these macros are register numbers. */ | |
994 | ||
995 | /* on the 386 the pc register is %eip, and is not usable as a general | |
996 | register. The ordinary mov instructions won't work */ | |
997 | /* #define PC_REGNUM */ | |
998 | ||
999 | /* Register to use for pushing function arguments. */ | |
1000 | #define STACK_POINTER_REGNUM 7 | |
1001 | ||
1002 | /* Base register for access to local variables of the function. */ | |
564d80f4 JH |
1003 | #define HARD_FRAME_POINTER_REGNUM 6 |
1004 | ||
1005 | /* Base register for access to local variables of the function. */ | |
1006 | #define FRAME_POINTER_REGNUM 20 | |
c98f8742 JVA |
1007 | |
1008 | /* First floating point reg */ | |
1009 | #define FIRST_FLOAT_REG 8 | |
1010 | ||
1011 | /* First & last stack-like regs */ | |
1012 | #define FIRST_STACK_REG FIRST_FLOAT_REG | |
1013 | #define LAST_STACK_REG (FIRST_FLOAT_REG + 7) | |
1014 | ||
e075ae69 RH |
1015 | #define FLAGS_REG 17 |
1016 | #define FPSR_REG 18 | |
7c7ef435 | 1017 | #define DIRFLAG_REG 19 |
e075ae69 | 1018 | |
a7180f70 BS |
1019 | #define FIRST_SSE_REG (FRAME_POINTER_REGNUM + 1) |
1020 | #define LAST_SSE_REG (FIRST_SSE_REG + 7) | |
1021 | ||
1022 | #define FIRST_MMX_REG (LAST_SSE_REG + 1) | |
1023 | #define LAST_MMX_REG (FIRST_MMX_REG + 7) | |
1024 | ||
3f3f2124 JH |
1025 | #define FIRST_REX_INT_REG (LAST_MMX_REG + 1) |
1026 | #define LAST_REX_INT_REG (FIRST_REX_INT_REG + 7) | |
1027 | ||
1028 | #define FIRST_REX_SSE_REG (LAST_REX_INT_REG + 1) | |
1029 | #define LAST_REX_SSE_REG (FIRST_REX_SSE_REG + 7) | |
1030 | ||
c98f8742 JVA |
1031 | /* Value should be nonzero if functions must have frame pointers. |
1032 | Zero means the frame pointer need not be set up (and parms | |
1033 | may be accessed via the stack pointer) in functions that seem suitable. | |
1034 | This is computed in `reload', in reload1.c. */ | |
6fca22eb RH |
1035 | #define FRAME_POINTER_REQUIRED ix86_frame_pointer_required () |
1036 | ||
1037 | /* Override this in other tm.h files to cope with various OS losage | |
1038 | requiring a frame pointer. */ | |
1039 | #ifndef SUBTARGET_FRAME_POINTER_REQUIRED | |
1040 | #define SUBTARGET_FRAME_POINTER_REQUIRED 0 | |
1041 | #endif | |
1042 | ||
1043 | /* Make sure we can access arbitrary call frames. */ | |
1044 | #define SETUP_FRAME_ADDRESSES() ix86_setup_frame_addresses () | |
c98f8742 JVA |
1045 | |
1046 | /* Base register for access to arguments of the function. */ | |
1047 | #define ARG_POINTER_REGNUM 16 | |
1048 | ||
d2836273 JH |
1049 | /* Register in which static-chain is passed to a function. |
1050 | We do use ECX as static chain register for 32 bit ABI. On the | |
1051 | 64bit ABI, ECX is an argument register, so we use R10 instead. */ | |
1052 | #define STATIC_CHAIN_REGNUM (TARGET_64BIT ? FIRST_REX_INT_REG + 10 - 8 : 2) | |
c98f8742 JVA |
1053 | |
1054 | /* Register to hold the addressing base for position independent | |
d2836273 JH |
1055 | code access to data items. |
1056 | We don't use PIC pointer for 64bit mode. Define the regnum to | |
1057 | dummy value to prevent gcc from pesimizing code dealing with EBX. | |
1058 | */ | |
1059 | #define PIC_OFFSET_TABLE_REGNUM (TARGET_64BIT ? INVALID_REGNUM : 3) | |
c98f8742 JVA |
1060 | |
1061 | /* Register in which address to store a structure value | |
1062 | arrives in the function. On the 386, the prologue | |
1063 | copies this from the stack to register %eax. */ | |
1064 | #define STRUCT_VALUE_INCOMING 0 | |
1065 | ||
1066 | /* Place in which caller passes the structure value address. | |
1067 | 0 means push the value on the stack like an argument. */ | |
1068 | #define STRUCT_VALUE 0 | |
713225d4 MM |
1069 | |
1070 | /* A C expression which can inhibit the returning of certain function | |
1071 | values in registers, based on the type of value. A nonzero value | |
1072 | says to return the function value in memory, just as large | |
1073 | structures are always returned. Here TYPE will be a C expression | |
1074 | of type `tree', representing the data type of the value. | |
1075 | ||
1076 | Note that values of mode `BLKmode' must be explicitly handled by | |
1077 | this macro. Also, the option `-fpcc-struct-return' takes effect | |
1078 | regardless of this macro. On most systems, it is possible to | |
1079 | leave the macro undefined; this causes a default definition to be | |
1080 | used, whose value is the constant 1 for `BLKmode' values, and 0 | |
1081 | otherwise. | |
1082 | ||
1083 | Do not use this macro to indicate that structures and unions | |
1084 | should always be returned in memory. You should instead use | |
1085 | `DEFAULT_PCC_STRUCT_RETURN' to indicate this. */ | |
1086 | ||
04b1a223 | 1087 | #define RETURN_IN_MEMORY(TYPE) \ |
53c17031 | 1088 | ix86_return_in_memory (TYPE) |
713225d4 | 1089 | |
c98f8742 JVA |
1090 | \f |
1091 | /* Define the classes of registers for register constraints in the | |
1092 | machine description. Also define ranges of constants. | |
1093 | ||
1094 | One of the classes must always be named ALL_REGS and include all hard regs. | |
1095 | If there is more than one class, another class must be named NO_REGS | |
1096 | and contain no registers. | |
1097 | ||
1098 | The name GENERAL_REGS must be the name of a class (or an alias for | |
1099 | another name such as ALL_REGS). This is the class of registers | |
1100 | that is allowed by "g" or "r" in a register constraint. | |
1101 | Also, registers outside this class are allocated only when | |
1102 | instructions express preferences for them. | |
1103 | ||
1104 | The classes must be numbered in nondecreasing order; that is, | |
1105 | a larger-numbered class must never be contained completely | |
1106 | in a smaller-numbered class. | |
1107 | ||
1108 | For any two classes, it is very desirable that there be another | |
ab408a86 JVA |
1109 | class that represents their union. |
1110 | ||
1111 | It might seem that class BREG is unnecessary, since no useful 386 | |
1112 | opcode needs reg %ebx. But some systems pass args to the OS in ebx, | |
e075ae69 RH |
1113 | and the "b" register constraint is useful in asms for syscalls. |
1114 | ||
1115 | The flags and fpsr registers are in no class. */ | |
c98f8742 JVA |
1116 | |
1117 | enum reg_class | |
1118 | { | |
1119 | NO_REGS, | |
e075ae69 | 1120 | AREG, DREG, CREG, BREG, SIREG, DIREG, |
4b71cd6e | 1121 | AD_REGS, /* %eax/%edx for DImode */ |
c98f8742 | 1122 | Q_REGS, /* %eax %ebx %ecx %edx */ |
564d80f4 | 1123 | NON_Q_REGS, /* %esi %edi %ebp %esp */ |
c98f8742 | 1124 | INDEX_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp */ |
3f3f2124 JH |
1125 | LEGACY_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp */ |
1126 | GENERAL_REGS, /* %eax %ebx %ecx %edx %esi %edi %ebp %esp %r8 - %r15*/ | |
c98f8742 JVA |
1127 | FP_TOP_REG, FP_SECOND_REG, /* %st(0) %st(1) */ |
1128 | FLOAT_REGS, | |
a7180f70 BS |
1129 | SSE_REGS, |
1130 | MMX_REGS, | |
446988df JH |
1131 | FP_TOP_SSE_REGS, |
1132 | FP_SECOND_SSE_REGS, | |
1133 | FLOAT_SSE_REGS, | |
1134 | FLOAT_INT_REGS, | |
1135 | INT_SSE_REGS, | |
1136 | FLOAT_INT_SSE_REGS, | |
c98f8742 JVA |
1137 | ALL_REGS, LIM_REG_CLASSES |
1138 | }; | |
1139 | ||
1140 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
1141 | ||
92d0fb09 | 1142 | #define INTEGER_CLASS_P(CLASS) (reg_class_subset_p (CLASS, GENERAL_REGS)) |
4cbb525c | 1143 | #define FLOAT_CLASS_P(CLASS) (reg_class_subset_p (CLASS, FLOAT_REGS)) |
f84aa48a JH |
1144 | #define SSE_CLASS_P(CLASS) (reg_class_subset_p (CLASS, SSE_REGS)) |
1145 | #define MMX_CLASS_P(CLASS) (reg_class_subset_p (CLASS, MMX_REGS)) | |
92d0fb09 | 1146 | #define MAYBE_INTEGER_CLASS_P(CLASS) (reg_classes_intersect_p (CLASS, GENERAL_REGS)) |
f84aa48a JH |
1147 | #define MAYBE_FLOAT_CLASS_P(CLASS) (reg_classes_intersect_p (CLASS, FLOAT_REGS)) |
1148 | #define MAYBE_SSE_CLASS_P(CLASS) (reg_classes_intersect_p (SSE_REGS, CLASS)) | |
1149 | #define MAYBE_MMX_CLASS_P(CLASS) (reg_classes_intersect_p (MMX_REGS, CLASS)) | |
4cbb525c | 1150 | |
7c6b971d JH |
1151 | #define Q_CLASS_P(CLASS) (reg_class_subset_p (CLASS, Q_REGS)) |
1152 | ||
c98f8742 JVA |
1153 | /* Give names of register classes as strings for dump file. */ |
1154 | ||
1155 | #define REG_CLASS_NAMES \ | |
1156 | { "NO_REGS", \ | |
ab408a86 | 1157 | "AREG", "DREG", "CREG", "BREG", \ |
c98f8742 | 1158 | "SIREG", "DIREG", \ |
e075ae69 RH |
1159 | "AD_REGS", \ |
1160 | "Q_REGS", "NON_Q_REGS", \ | |
c98f8742 | 1161 | "INDEX_REGS", \ |
3f3f2124 | 1162 | "LEGACY_REGS", \ |
c98f8742 JVA |
1163 | "GENERAL_REGS", \ |
1164 | "FP_TOP_REG", "FP_SECOND_REG", \ | |
1165 | "FLOAT_REGS", \ | |
a7180f70 BS |
1166 | "SSE_REGS", \ |
1167 | "MMX_REGS", \ | |
446988df JH |
1168 | "FP_TOP_SSE_REGS", \ |
1169 | "FP_SECOND_SSE_REGS", \ | |
1170 | "FLOAT_SSE_REGS", \ | |
8fcaaa80 | 1171 | "FLOAT_INT_REGS", \ |
446988df JH |
1172 | "INT_SSE_REGS", \ |
1173 | "FLOAT_INT_SSE_REGS", \ | |
c98f8742 JVA |
1174 | "ALL_REGS" } |
1175 | ||
1176 | /* Define which registers fit in which classes. | |
1177 | This is an initializer for a vector of HARD_REG_SET | |
1178 | of length N_REG_CLASSES. */ | |
1179 | ||
a7180f70 | 1180 | #define REG_CLASS_CONTENTS \ |
3f3f2124 JH |
1181 | { { 0x00, 0x0 }, \ |
1182 | { 0x01, 0x0 }, { 0x02, 0x0 }, /* AREG, DREG */ \ | |
1183 | { 0x04, 0x0 }, { 0x08, 0x0 }, /* CREG, BREG */ \ | |
1184 | { 0x10, 0x0 }, { 0x20, 0x0 }, /* SIREG, DIREG */ \ | |
1185 | { 0x03, 0x0 }, /* AD_REGS */ \ | |
1186 | { 0x0f, 0x0 }, /* Q_REGS */ \ | |
1187 | { 0x1100f0, 0x1fe0 }, /* NON_Q_REGS */ \ | |
1188 | { 0x7f, 0x1fe0 }, /* INDEX_REGS */ \ | |
1189 | { 0x1100ff, 0x0 }, /* LEGACY_REGS */ \ | |
1190 | { 0x1100ff, 0x1fe0 }, /* GENERAL_REGS */ \ | |
1191 | { 0x100, 0x0 }, { 0x0200, 0x0 },/* FP_TOP_REG, FP_SECOND_REG */\ | |
1192 | { 0xff00, 0x0 }, /* FLOAT_REGS */ \ | |
1193 | { 0x1fe00000,0x1fe000 }, /* SSE_REGS */ \ | |
1194 | { 0xe0000000, 0x1f }, /* MMX_REGS */ \ | |
1195 | { 0x1fe00100,0x1fe000 }, /* FP_TOP_SSE_REG */ \ | |
1196 | { 0x1fe00200,0x1fe000 }, /* FP_SECOND_SSE_REG */ \ | |
1197 | { 0x1fe0ff00,0x1fe000 }, /* FLOAT_SSE_REGS */ \ | |
1198 | { 0x1ffff, 0x1fe0 }, /* FLOAT_INT_REGS */ \ | |
1199 | { 0x1fe100ff,0x1fffe0 }, /* INT_SSE_REGS */ \ | |
1200 | { 0x1fe1ffff,0x1fffe0 }, /* FLOAT_INT_SSE_REGS */ \ | |
1201 | { 0xffffffff,0x1fffff } \ | |
e075ae69 | 1202 | } |
c98f8742 JVA |
1203 | |
1204 | /* The same information, inverted: | |
1205 | Return the class number of the smallest class containing | |
1206 | reg number REGNO. This could be a conditional expression | |
1207 | or could index an array. */ | |
1208 | ||
c98f8742 JVA |
1209 | #define REGNO_REG_CLASS(REGNO) (regclass_map[REGNO]) |
1210 | ||
1211 | /* When defined, the compiler allows registers explicitly used in the | |
1212 | rtl to be used as spill registers but prevents the compiler from | |
1213 | extending the lifetime of these registers. */ | |
1214 | ||
2922fe9e | 1215 | #define SMALL_REGISTER_CLASSES 1 |
c98f8742 JVA |
1216 | |
1217 | #define QI_REG_P(X) \ | |
1218 | (REG_P (X) && REGNO (X) < 4) | |
3f3f2124 JH |
1219 | |
1220 | #define GENERAL_REGNO_P(n) \ | |
1221 | ((n) < 8 || REX_INT_REGNO_P (n)) | |
1222 | ||
1223 | #define GENERAL_REG_P(X) \ | |
6189a572 | 1224 | (REG_P (X) && GENERAL_REGNO_P (REGNO (X))) |
3f3f2124 JH |
1225 | |
1226 | #define ANY_QI_REG_P(X) (TARGET_64BIT ? GENERAL_REG_P(X) : QI_REG_P (X)) | |
1227 | ||
c98f8742 JVA |
1228 | #define NON_QI_REG_P(X) \ |
1229 | (REG_P (X) && REGNO (X) >= 4 && REGNO (X) < FIRST_PSEUDO_REGISTER) | |
1230 | ||
3f3f2124 JH |
1231 | #define REX_INT_REGNO_P(n) ((n) >= FIRST_REX_INT_REG && (n) <= LAST_REX_INT_REG) |
1232 | #define REX_INT_REG_P(X) (REG_P (X) && REX_INT_REGNO_P (REGNO (X))) | |
1233 | ||
c98f8742 JVA |
1234 | #define FP_REG_P(X) (REG_P (X) && FP_REGNO_P (REGNO (X))) |
1235 | #define FP_REGNO_P(n) ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) | |
446988df JH |
1236 | #define ANY_FP_REG_P(X) (REG_P (X) && ANY_FP_REGNO_P (REGNO (X))) |
1237 | #define ANY_FP_REGNO_P(n) (FP_REGNO_P (n) || SSE_REGNO_P (n)) | |
a7180f70 | 1238 | |
3f3f2124 JH |
1239 | #define SSE_REGNO_P(n) \ |
1240 | (((n) >= FIRST_SSE_REG && (n) <= LAST_SSE_REG) \ | |
1241 | || ((n) >= FIRST_REX_SSE_REG && (n) <= LAST_REX_SSE_REG)) | |
1242 | ||
1243 | #define SSE_REGNO(n) \ | |
1244 | ((n) < 8 ? FIRST_SSE_REG + (n) : FIRST_REX_SSE_REG + (n) - 8) | |
446988df JH |
1245 | #define SSE_REG_P(n) (REG_P (n) && SSE_REGNO_P (REGNO (n))) |
1246 | ||
1247 | #define SSE_FLOAT_MODE_P(m) \ | |
1248 | ((TARGET_SSE && (m) == SFmode) || (TARGET_SSE2 && (m) == DFmode)) | |
a7180f70 BS |
1249 | |
1250 | #define MMX_REGNO_P(n) ((n) >= FIRST_MMX_REG && (n) <= LAST_MMX_REG) | |
1251 | #define MMX_REG_P(xop) (REG_P (xop) && MMX_REGNO_P (REGNO (xop))) | |
c98f8742 JVA |
1252 | |
1253 | #define STACK_REG_P(xop) (REG_P (xop) && \ | |
1254 | REGNO (xop) >= FIRST_STACK_REG && \ | |
1255 | REGNO (xop) <= LAST_STACK_REG) | |
1256 | ||
1257 | #define NON_STACK_REG_P(xop) (REG_P (xop) && ! STACK_REG_P (xop)) | |
1258 | ||
1259 | #define STACK_TOP_P(xop) (REG_P (xop) && REGNO (xop) == FIRST_STACK_REG) | |
1260 | ||
e075ae69 RH |
1261 | #define CC_REG_P(X) (REG_P (X) && CC_REGNO_P (REGNO (X))) |
1262 | #define CC_REGNO_P(X) ((X) == FLAGS_REG || (X) == FPSR_REG) | |
1263 | ||
cdbca172 JO |
1264 | /* Indicate whether hard register numbered REG_NO should be converted |
1265 | to SSA form. */ | |
1266 | #define CONVERT_HARD_REGISTER_TO_SSA_P(REG_NO) \ | |
1267 | (REG_NO == FLAGS_REG || REG_NO == ARG_POINTER_REGNUM) | |
1268 | ||
c98f8742 JVA |
1269 | /* The class value for index registers, and the one for base regs. */ |
1270 | ||
1271 | #define INDEX_REG_CLASS INDEX_REGS | |
1272 | #define BASE_REG_CLASS GENERAL_REGS | |
1273 | ||
1274 | /* Get reg_class from a letter such as appears in the machine description. */ | |
1275 | ||
1276 | #define REG_CLASS_FROM_LETTER(C) \ | |
8c2bf92a | 1277 | ((C) == 'r' ? GENERAL_REGS : \ |
3f3f2124 JH |
1278 | (C) == 'R' ? LEGACY_REGS : \ |
1279 | (C) == 'q' ? TARGET_64BIT ? GENERAL_REGS : Q_REGS : \ | |
1280 | (C) == 'Q' ? Q_REGS : \ | |
8c2bf92a JVA |
1281 | (C) == 'f' ? (TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 \ |
1282 | ? FLOAT_REGS \ | |
1283 | : NO_REGS) : \ | |
1284 | (C) == 't' ? (TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 \ | |
1285 | ? FP_TOP_REG \ | |
1286 | : NO_REGS) : \ | |
1287 | (C) == 'u' ? (TARGET_80387 || TARGET_FLOAT_RETURNS_IN_80387 \ | |
1288 | ? FP_SECOND_REG \ | |
1289 | : NO_REGS) : \ | |
1290 | (C) == 'a' ? AREG : \ | |
1291 | (C) == 'b' ? BREG : \ | |
1292 | (C) == 'c' ? CREG : \ | |
1293 | (C) == 'd' ? DREG : \ | |
446988df JH |
1294 | (C) == 'x' ? TARGET_SSE ? SSE_REGS : NO_REGS : \ |
1295 | (C) == 'Y' ? TARGET_SSE2? SSE_REGS : NO_REGS : \ | |
1296 | (C) == 'y' ? TARGET_MMX ? MMX_REGS : NO_REGS : \ | |
4b71cd6e | 1297 | (C) == 'A' ? AD_REGS : \ |
8c2bf92a | 1298 | (C) == 'D' ? DIREG : \ |
c98f8742 JVA |
1299 | (C) == 'S' ? SIREG : NO_REGS) |
1300 | ||
1301 | /* The letters I, J, K, L and M in a register constraint string | |
1302 | can be used to stand for particular ranges of immediate operands. | |
1303 | This macro defines what the ranges are. | |
1304 | C is the letter, and VALUE is a constant value. | |
1305 | Return 1 if VALUE is in the range specified by C. | |
1306 | ||
1307 | I is for non-DImode shifts. | |
1308 | J is for DImode shifts. | |
e075ae69 RH |
1309 | K is for signed imm8 operands. |
1310 | L is for andsi as zero-extending move. | |
c98f8742 | 1311 | M is for shifts that can be executed by the "lea" opcode. |
1aa9fd24 | 1312 | N is for immedaite operands for out/in instructions (0-255) |
c98f8742 JVA |
1313 | */ |
1314 | ||
e075ae69 RH |
1315 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ |
1316 | ((C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 31 \ | |
1317 | : (C) == 'J' ? (VALUE) >= 0 && (VALUE) <= 63 \ | |
1318 | : (C) == 'K' ? (VALUE) >= -128 && (VALUE) <= 127 \ | |
1319 | : (C) == 'L' ? (VALUE) == 0xff || (VALUE) == 0xffff \ | |
1320 | : (C) == 'M' ? (VALUE) >= 0 && (VALUE) <= 3 \ | |
1aa9fd24 | 1321 | : (C) == 'N' ? (VALUE) >= 0 && (VALUE) <= 255 \ |
e075ae69 | 1322 | : 0) |
c98f8742 JVA |
1323 | |
1324 | /* Similar, but for floating constants, and defining letters G and H. | |
b4ac57ab RS |
1325 | Here VALUE is the CONST_DOUBLE rtx itself. We allow constants even if |
1326 | TARGET_387 isn't set, because the stack register converter may need to | |
c47f5ea5 | 1327 | load 0.0 into the function value register. */ |
c98f8742 JVA |
1328 | |
1329 | #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ | |
2b04e52b JH |
1330 | ((C) == 'G' ? standard_80387_constant_p (VALUE) \ |
1331 | : ((C) == 'H' ? standard_sse_constant_p (VALUE) : 0)) | |
c98f8742 | 1332 | |
6189a572 JH |
1333 | /* A C expression that defines the optional machine-dependent |
1334 | constraint letters that can be used to segregate specific types of | |
1335 | operands, usually memory references, for the target machine. Any | |
1336 | letter that is not elsewhere defined and not matched by | |
1337 | `REG_CLASS_FROM_LETTER' may be used. Normally this macro will not | |
1338 | be defined. | |
1339 | ||
1340 | If it is required for a particular target machine, it should | |
1341 | return 1 if VALUE corresponds to the operand type represented by | |
1342 | the constraint letter C. If C is not defined as an extra | |
1343 | constraint, the value returned should be 0 regardless of VALUE. */ | |
1344 | ||
1345 | #define EXTRA_CONSTRAINT(VALUE, C) \ | |
1346 | ((C) == 'e' ? x86_64_sign_extended_value (VALUE) \ | |
1347 | : (C) == 'Z' ? x86_64_zero_extended_value (VALUE) \ | |
1348 | : 0) | |
1349 | ||
c98f8742 | 1350 | /* Place additional restrictions on the register class to use when it |
4cbb525c JVA |
1351 | is necessary to be able to hold a value of mode MODE in a reload |
1352 | register for which class CLASS would ordinarily be used. */ | |
c98f8742 | 1353 | |
d2836273 JH |
1354 | #define LIMIT_RELOAD_CLASS(MODE, CLASS) \ |
1355 | ((MODE) == QImode && !TARGET_64BIT \ | |
1356 | && ((CLASS) == ALL_REGS || (CLASS) == GENERAL_REGS) \ | |
c98f8742 JVA |
1357 | ? Q_REGS : (CLASS)) |
1358 | ||
1359 | /* Given an rtx X being reloaded into a reg required to be | |
1360 | in class CLASS, return the class of reg to actually use. | |
1361 | In general this is just CLASS; but on some machines | |
1362 | in some cases it is preferable to use a more restrictive class. | |
1363 | On the 80386 series, we prevent floating constants from being | |
1364 | reloaded into floating registers (since no move-insn can do that) | |
1365 | and we ensure that QImodes aren't reloaded into the esi or edi reg. */ | |
1366 | ||
d398b3b1 | 1367 | /* Put float CONST_DOUBLE in the constant pool instead of fp regs. |
c98f8742 | 1368 | QImode must go into class Q_REGS. |
d398b3b1 JVA |
1369 | Narrow ALL_REGS to GENERAL_REGS. This supports allowing movsf and |
1370 | movdf to do mem-to-mem moves through integer regs. */ | |
c98f8742 | 1371 | |
b66a3ac1 | 1372 | #define PREFERRED_RELOAD_CLASS(X,CLASS) \ |
f84aa48a | 1373 | ix86_preferred_reload_class (X, CLASS) |
85ff473e JVA |
1374 | |
1375 | /* If we are copying between general and FP registers, we need a memory | |
f84aa48a | 1376 | location. The same is true for SSE and MMX registers. */ |
85ff473e | 1377 | #define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \ |
f84aa48a | 1378 | ix86_secondary_memory_needed (CLASS1, CLASS2, MODE, 1) |
e075ae69 RH |
1379 | |
1380 | /* QImode spills from non-QI registers need a scratch. This does not | |
1381 | happen often -- the only example so far requires an uninitialized | |
1382 | pseudo. */ | |
1383 | ||
1384 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS,MODE,OUT) \ | |
d2836273 JH |
1385 | ((CLASS) == GENERAL_REGS && !TARGET_64BIT && (MODE) == QImode \ |
1386 | ? Q_REGS : NO_REGS) | |
c98f8742 JVA |
1387 | |
1388 | /* Return the maximum number of consecutive registers | |
1389 | needed to represent mode MODE in a register of class CLASS. */ | |
1390 | /* On the 80386, this is the size of MODE in words, | |
92d0fb09 JH |
1391 | except in the FP regs, where a single reg is always enough. |
1392 | The TFmodes are really just 80bit values, so we use only 3 registers | |
1393 | to hold them, instead of 4, as the size would suggest. | |
1394 | */ | |
a7180f70 | 1395 | #define CLASS_MAX_NREGS(CLASS, MODE) \ |
92d0fb09 JH |
1396 | (!MAYBE_INTEGER_CLASS_P (CLASS) \ |
1397 | ? (COMPLEX_MODE_P (MODE) ? 2 : 1) \ | |
1398 | : ((GET_MODE_SIZE ((MODE) == TFmode ? XFmode : (MODE)) \ | |
1399 | + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) | |
f5316dfe MM |
1400 | |
1401 | /* A C expression whose value is nonzero if pseudos that have been | |
1402 | assigned to registers of class CLASS would likely be spilled | |
1403 | because registers of CLASS are needed for spill registers. | |
1404 | ||
1405 | The default value of this macro returns 1 if CLASS has exactly one | |
1406 | register and zero otherwise. On most machines, this default | |
1407 | should be used. Only define this macro to some other expression | |
1408 | if pseudo allocated by `local-alloc.c' end up in memory because | |
ddd5a7c1 | 1409 | their hard registers were needed for spill registers. If this |
f5316dfe MM |
1410 | macro returns nonzero for those classes, those pseudos will only |
1411 | be allocated by `global.c', which knows how to reallocate the | |
1412 | pseudo to another register. If there would not be another | |
1413 | register available for reallocation, you should not change the | |
1414 | definition of this macro since the only effect of such a | |
1415 | definition would be to slow down register allocation. */ | |
1416 | ||
1417 | #define CLASS_LIKELY_SPILLED_P(CLASS) \ | |
1418 | (((CLASS) == AREG) \ | |
1419 | || ((CLASS) == DREG) \ | |
1420 | || ((CLASS) == CREG) \ | |
1421 | || ((CLASS) == BREG) \ | |
1422 | || ((CLASS) == AD_REGS) \ | |
1423 | || ((CLASS) == SIREG) \ | |
1424 | || ((CLASS) == DIREG)) | |
1425 | ||
e075ae69 RH |
1426 | /* A C statement that adds to CLOBBERS any hard regs the port wishes |
1427 | to automatically clobber for all asms. | |
1428 | ||
1429 | We do this in the new i386 backend to maintain source compatibility | |
1430 | with the old cc0-based compiler. */ | |
1431 | ||
1432 | #define MD_ASM_CLOBBERS(CLOBBERS) \ | |
1433 | do { \ | |
1434 | (CLOBBERS) = tree_cons (NULL_TREE, build_string (5, "flags"), (CLOBBERS));\ | |
1435 | (CLOBBERS) = tree_cons (NULL_TREE, build_string (4, "fpsr"), (CLOBBERS)); \ | |
7c7ef435 | 1436 | (CLOBBERS) = tree_cons (NULL_TREE, build_string (7, "dirflag"), (CLOBBERS)); \ |
e075ae69 | 1437 | } while (0) |
c98f8742 JVA |
1438 | \f |
1439 | /* Stack layout; function entry, exit and calling. */ | |
1440 | ||
1441 | /* Define this if pushing a word on the stack | |
1442 | makes the stack pointer a smaller address. */ | |
1443 | #define STACK_GROWS_DOWNWARD | |
1444 | ||
1445 | /* Define this if the nominal address of the stack frame | |
1446 | is at the high-address end of the local variables; | |
1447 | that is, each additional local variable allocated | |
1448 | goes at a more negative offset in the frame. */ | |
1449 | #define FRAME_GROWS_DOWNWARD | |
1450 | ||
1451 | /* Offset within stack frame to start allocating local variables at. | |
1452 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
1453 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
1454 | of the first local allocated. */ | |
1455 | #define STARTING_FRAME_OFFSET 0 | |
1456 | ||
1457 | /* If we generate an insn to push BYTES bytes, | |
1458 | this says how many the stack pointer really advances by. | |
1459 | On 386 pushw decrements by exactly 2 no matter what the position was. | |
1460 | On the 386 there is no pushb; we use pushw instead, and this | |
d2836273 JH |
1461 | has the effect of rounding up to 2. |
1462 | ||
1463 | For 64bit ABI we round up to 8 bytes. | |
1464 | */ | |
c98f8742 | 1465 | |
d2836273 JH |
1466 | #define PUSH_ROUNDING(BYTES) \ |
1467 | (TARGET_64BIT \ | |
1468 | ? (((BYTES) + 7) & (-8)) \ | |
1469 | : (((BYTES) + 1) & (-2))) | |
c98f8742 | 1470 | |
f73ad30e JH |
1471 | /* If defined, the maximum amount of space required for outgoing arguments will |
1472 | be computed and placed into the variable | |
1473 | `current_function_outgoing_args_size'. No space will be pushed onto the | |
1474 | stack for each call; instead, the function prologue should increase the stack | |
1475 | frame size by this amount. */ | |
1476 | ||
1477 | #define ACCUMULATE_OUTGOING_ARGS TARGET_ACCUMULATE_OUTGOING_ARGS | |
1478 | ||
1479 | /* If defined, a C expression whose value is nonzero when we want to use PUSH | |
1480 | instructions to pass outgoing arguments. */ | |
1481 | ||
1482 | #define PUSH_ARGS (TARGET_PUSH_ARGS && !ACCUMULATE_OUTGOING_ARGS) | |
1483 | ||
c98f8742 JVA |
1484 | /* Offset of first parameter from the argument pointer register value. */ |
1485 | #define FIRST_PARM_OFFSET(FNDECL) 0 | |
1486 | ||
a7180f70 BS |
1487 | /* Define this macro if functions should assume that stack space has been |
1488 | allocated for arguments even when their values are passed in registers. | |
1489 | ||
1490 | The value of this macro is the size, in bytes, of the area reserved for | |
1491 | arguments passed in registers for the function represented by FNDECL. | |
1492 | ||
1493 | This space can be allocated by the caller, or be a part of the | |
1494 | machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says | |
1495 | which. */ | |
1496 | #define REG_PARM_STACK_SPACE(FNDECL) 0 | |
1497 | ||
1498 | /* Define as a C expression that evaluates to nonzero if we do not know how | |
1499 | to pass TYPE solely in registers. The file expr.h defines a | |
1500 | definition that is usually appropriate, refer to expr.h for additional | |
1501 | documentation. If `REG_PARM_STACK_SPACE' is defined, the argument will be | |
1502 | computed in the stack and then loaded into a register. */ | |
1503 | #define MUST_PASS_IN_STACK(MODE,TYPE) \ | |
1504 | ((TYPE) != 0 \ | |
1505 | && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ | |
1506 | || TREE_ADDRESSABLE (TYPE) \ | |
1507 | || ((MODE) == TImode) \ | |
1508 | || ((MODE) == BLKmode \ | |
1509 | && ! ((TYPE) != 0 && TREE_CODE (TYPE_SIZE (TYPE)) == INTEGER_CST \ | |
1510 | && 0 == (int_size_in_bytes (TYPE) \ | |
1511 | % (PARM_BOUNDARY / BITS_PER_UNIT))) \ | |
1512 | && (FUNCTION_ARG_PADDING (MODE, TYPE) \ | |
1513 | == (BYTES_BIG_ENDIAN ? upward : downward))))) | |
1514 | ||
c98f8742 JVA |
1515 | /* Value is the number of bytes of arguments automatically |
1516 | popped when returning from a subroutine call. | |
8b109b37 | 1517 | FUNDECL is the declaration node of the function (as a tree), |
c98f8742 JVA |
1518 | FUNTYPE is the data type of the function (as a tree), |
1519 | or for a library call it is an identifier node for the subroutine name. | |
1520 | SIZE is the number of bytes of arguments passed on the stack. | |
1521 | ||
1522 | On the 80386, the RTD insn may be used to pop them if the number | |
1523 | of args is fixed, but if the number is variable then the caller | |
1524 | must pop them all. RTD can't be used for library calls now | |
1525 | because the library is compiled with the Unix compiler. | |
1526 | Use of RTD is a selectable option, since it is incompatible with | |
1527 | standard Unix calling sequences. If the option is not selected, | |
b08de47e MM |
1528 | the caller must always pop the args. |
1529 | ||
1530 | The attribute stdcall is equivalent to RTD on a per module basis. */ | |
c98f8742 | 1531 | |
b08de47e | 1532 | #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) \ |
e075ae69 | 1533 | (ix86_return_pops_args (FUNDECL, FUNTYPE, SIZE)) |
c98f8742 | 1534 | |
8c2bf92a JVA |
1535 | /* Define how to find the value returned by a function. |
1536 | VALTYPE is the data type of the value (as a tree). | |
1537 | If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
1538 | otherwise, FUNC is 0. */ | |
c98f8742 | 1539 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ |
53c17031 JH |
1540 | ix86_function_value (VALTYPE) |
1541 | ||
1542 | #define FUNCTION_VALUE_REGNO_P(N) \ | |
1543 | ix86_function_value_regno_p (N) | |
c98f8742 JVA |
1544 | |
1545 | /* Define how to find the value returned by a library function | |
1546 | assuming the value has mode MODE. */ | |
1547 | ||
1548 | #define LIBCALL_VALUE(MODE) \ | |
53c17031 | 1549 | ix86_libcall_value (MODE) |
c98f8742 | 1550 | |
e9125c09 TW |
1551 | /* Define the size of the result block used for communication between |
1552 | untyped_call and untyped_return. The block contains a DImode value | |
1553 | followed by the block used by fnsave and frstor. */ | |
1554 | ||
1555 | #define APPLY_RESULT_SIZE (8+108) | |
1556 | ||
b08de47e | 1557 | /* 1 if N is a possible register number for function argument passing. */ |
53c17031 | 1558 | #define FUNCTION_ARG_REGNO_P(N) ix86_function_arg_regno_p (N) |
c98f8742 JVA |
1559 | |
1560 | /* Define a data type for recording info about an argument list | |
1561 | during the scan of that argument list. This data type should | |
1562 | hold all necessary information about the function itself | |
1563 | and about the args processed so far, enough to enable macros | |
b08de47e | 1564 | such as FUNCTION_ARG to determine where the next arg should go. */ |
c98f8742 | 1565 | |
e075ae69 | 1566 | typedef struct ix86_args { |
b08de47e MM |
1567 | int words; /* # words passed so far */ |
1568 | int nregs; /* # registers available for passing */ | |
1569 | int regno; /* next available register number */ | |
a7180f70 BS |
1570 | int sse_words; /* # sse words passed so far */ |
1571 | int sse_nregs; /* # sse registers available for passing */ | |
1572 | int sse_regno; /* next available sse register number */ | |
53c17031 | 1573 | int maybe_vaarg; /* true for calls to possibly vardic fncts. */ |
b08de47e | 1574 | } CUMULATIVE_ARGS; |
c98f8742 JVA |
1575 | |
1576 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
1577 | for a call to a function whose data type is FNTYPE. | |
b08de47e | 1578 | For a library call, FNTYPE is 0. */ |
c98f8742 | 1579 | |
2c7ee1a6 | 1580 | #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \ |
b08de47e | 1581 | (init_cumulative_args (&CUM, FNTYPE, LIBNAME)) |
c98f8742 JVA |
1582 | |
1583 | /* Update the data in CUM to advance over an argument | |
1584 | of mode MODE and data type TYPE. | |
1585 | (TYPE is null for libcalls where that information may not be available.) */ | |
1586 | ||
1587 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
b08de47e | 1588 | (function_arg_advance (&CUM, MODE, TYPE, NAMED)) |
c98f8742 JVA |
1589 | |
1590 | /* Define where to put the arguments to a function. | |
1591 | Value is zero to push the argument on the stack, | |
1592 | or a hard register in which to store the argument. | |
1593 | ||
1594 | MODE is the argument's machine mode. | |
1595 | TYPE is the data type of the argument (as a tree). | |
1596 | This is null for libcalls where that information may | |
1597 | not be available. | |
1598 | CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
1599 | the preceding args and about the function being called. | |
1600 | NAMED is nonzero if this argument is a named parameter | |
1601 | (otherwise it is an extra parameter matching an ellipsis). */ | |
1602 | ||
c98f8742 | 1603 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ |
b08de47e | 1604 | (function_arg (&CUM, MODE, TYPE, NAMED)) |
c98f8742 JVA |
1605 | |
1606 | /* For an arg passed partly in registers and partly in memory, | |
1607 | this is the number of registers used. | |
1608 | For args passed entirely in registers or entirely in memory, zero. */ | |
1609 | ||
e075ae69 | 1610 | #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0 |
c98f8742 | 1611 | |
26f2c02a ZW |
1612 | /* If PIC, we cannot make sibling calls to global functions |
1613 | because the PLT requires %ebx live. | |
1614 | If we are returning floats on the register stack, we cannot make | |
1615 | sibling calls to functions that return floats. (The stack adjust | |
1616 | instruction will wind up after the sibcall jump, and not be executed.) */ | |
2a4bbffa RH |
1617 | #define FUNCTION_OK_FOR_SIBCALL(DECL) \ |
1618 | (DECL \ | |
26f2c02a ZW |
1619 | && (! flag_pic || ! TREE_PUBLIC (DECL)) \ |
1620 | && (! TARGET_FLOAT_RETURNS_IN_80387 \ | |
1621 | || ! FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (TREE_TYPE (DECL)))) \ | |
1622 | || FLOAT_MODE_P (TYPE_MODE (TREE_TYPE (TREE_TYPE (cfun->decl)))))) | |
cbbf65e0 | 1623 | |
ad919812 JH |
1624 | /* Perform any needed actions needed for a function that is receiving a |
1625 | variable number of arguments. | |
1626 | ||
1627 | CUM is as above. | |
1628 | ||
1629 | MODE and TYPE are the mode and type of the current parameter. | |
1630 | ||
1631 | PRETEND_SIZE is a variable that should be set to the amount of stack | |
1632 | that must be pushed by the prolog to pretend that our caller pushed | |
1633 | it. | |
1634 | ||
1635 | Normally, this macro will push all remaining incoming registers on the | |
1636 | stack and set PRETEND_SIZE to the length of the registers pushed. */ | |
1637 | ||
1638 | #define SETUP_INCOMING_VARARGS(CUM,MODE,TYPE,PRETEND_SIZE,NO_RTL) \ | |
1639 | ix86_setup_incoming_varargs (&CUM, MODE, TYPE, &PRETEND_SIZE, NO_RTL) | |
1640 | ||
1641 | /* Define the `__builtin_va_list' type for the ABI. */ | |
1642 | #define BUILD_VA_LIST_TYPE(VALIST) \ | |
1643 | (VALIST) = ix86_build_va_list () | |
1644 | ||
1645 | /* Implement `va_start' for varargs and stdarg. */ | |
1646 | #define EXPAND_BUILTIN_VA_START(stdarg, valist, nextarg) \ | |
1647 | ix86_va_start (stdarg, valist, nextarg) | |
1648 | ||
1649 | /* Implement `va_arg'. */ | |
1650 | #define EXPAND_BUILTIN_VA_ARG(valist, type) \ | |
1651 | ix86_va_arg (valist, type) | |
1652 | ||
4cf12e7e RH |
1653 | /* This macro is invoked at the end of compilation. It is used here to |
1654 | output code for -fpic that will load the return address into %ebx. */ | |
3a0433fd | 1655 | |
4cf12e7e RH |
1656 | #undef ASM_FILE_END |
1657 | #define ASM_FILE_END(FILE) ix86_asm_file_end (FILE) | |
3a0433fd | 1658 | |
c98f8742 JVA |
1659 | /* Output assembler code to FILE to increment profiler label # LABELNO |
1660 | for profiling a function entry. */ | |
1661 | ||
1662 | #define FUNCTION_PROFILER(FILE, LABELNO) \ | |
1663 | { \ | |
1664 | if (flag_pic) \ | |
1665 | { \ | |
e075ae69 | 1666 | fprintf (FILE, "\tleal\t%sP%d@GOTOFF(%%ebx),%%edx\n", \ |
c98f8742 | 1667 | LPREFIX, (LABELNO)); \ |
e075ae69 | 1668 | fprintf (FILE, "\tcall\t*_mcount@GOT(%%ebx)\n"); \ |
c98f8742 JVA |
1669 | } \ |
1670 | else \ | |
1671 | { \ | |
e075ae69 RH |
1672 | fprintf (FILE, "\tmovl\t$%sP%d,%%edx\n", LPREFIX, (LABELNO)); \ |
1673 | fprintf (FILE, "\tcall\t_mcount\n"); \ | |
c98f8742 JVA |
1674 | } \ |
1675 | } | |
1676 | ||
1cf5eda8 | 1677 | |
6e753900 RK |
1678 | /* There are three profiling modes for basic blocks available. |
1679 | The modes are selected at compile time by using the options | |
1680 | -a or -ax of the gnu compiler. | |
1681 | The variable `profile_block_flag' will be set according to the | |
1682 | selected option. | |
1cf5eda8 | 1683 | |
6e753900 | 1684 | profile_block_flag == 0, no option used: |
1cf5eda8 | 1685 | |
6e753900 | 1686 | No profiling done. |
1cf5eda8 | 1687 | |
6e753900 RK |
1688 | profile_block_flag == 1, -a option used. |
1689 | ||
1690 | Count frequency of execution of every basic block. | |
1691 | ||
1692 | profile_block_flag == 2, -ax option used. | |
1693 | ||
1694 | Generate code to allow several different profiling modes at run time. | |
1695 | Available modes are: | |
1696 | Produce a trace of all basic blocks. | |
1697 | Count frequency of jump instructions executed. | |
1698 | In every mode it is possible to start profiling upon entering | |
1699 | certain functions and to disable profiling of some other functions. | |
1700 | ||
1701 | The result of basic-block profiling will be written to a file `bb.out'. | |
1702 | If the -ax option is used parameters for the profiling will be read | |
1703 | from file `bb.in'. | |
1704 | ||
1705 | */ | |
1706 | ||
1707 | /* The following macro shall output assembler code to FILE | |
e075ae69 | 1708 | to initialize basic-block profiling. */ |
1cf5eda8 MM |
1709 | |
1710 | #undef FUNCTION_BLOCK_PROFILER | |
e075ae69 RH |
1711 | #define FUNCTION_BLOCK_PROFILER(FILE, BLOCK_OR_LABEL) \ |
1712 | ix86_output_function_block_profiler (FILE, BLOCK_OR_LABEL) | |
1cf5eda8 | 1713 | |
6e753900 | 1714 | /* The following macro shall output assembler code to FILE |
e075ae69 | 1715 | to increment a counter associated with basic block number BLOCKNO. */ |
6e753900 | 1716 | |
e075ae69 RH |
1717 | #define BLOCK_PROFILER(FILE, BLOCKNO) \ |
1718 | ix86_output_block_profiler (FILE, BLOCKNO) | |
1cf5eda8 | 1719 | |
e075ae69 | 1720 | /* The following macro shall output rtl for the epilogue |
6e753900 RK |
1721 | to indicate a return from function during basic-block profiling. |
1722 | ||
1723 | If profiling_block_flag == 2: | |
1724 | ||
1725 | Output assembler code to call function `__bb_trace_ret'. | |
1726 | ||
1727 | Note that function `__bb_trace_ret' must not change the | |
1728 | machine state, especially the flag register. To grant | |
1729 | this, you must output code to save and restore registers | |
78a0d70c ZW |
1730 | either in this macro or in the macros MACHINE_STATE_SAVE |
1731 | and MACHINE_STATE_RESTORE. The last two macros will be | |
6e753900 RK |
1732 | used in the function `__bb_trace_ret', so you must make |
1733 | sure that the function prologue does not change any | |
78a0d70c | 1734 | register prior to saving it with MACHINE_STATE_SAVE. |
6e753900 RK |
1735 | |
1736 | else if profiling_block_flag != 0: | |
1737 | ||
1738 | The macro will not be used, so it need not distinguish | |
1739 | these cases. | |
1740 | */ | |
1741 | ||
e075ae69 | 1742 | #define FUNCTION_BLOCK_PROFILER_EXIT \ |
d8b2fb52 | 1743 | emit_call_insn (gen_call (gen_rtx_MEM (QImode, \ |
e075ae69 | 1744 | gen_rtx_SYMBOL_REF (VOIDmode, "__bb_trace_ret")), \ |
32ee7d1d | 1745 | const0_rtx, constm1_rtx)) |
6e753900 RK |
1746 | |
1747 | /* The function `__bb_trace_func' is called in every basic block | |
1748 | and is not allowed to change the machine state. Saving (restoring) | |
1749 | the state can either be done in the BLOCK_PROFILER macro, | |
1750 | before calling function (rsp. after returning from function) | |
1751 | `__bb_trace_func', or it can be done inside the function by | |
1752 | defining the macros: | |
1753 | ||
1754 | MACHINE_STATE_SAVE(ID) | |
1755 | MACHINE_STATE_RESTORE(ID) | |
1756 | ||
1757 | In the latter case care must be taken, that the prologue code | |
1758 | of function `__bb_trace_func' does not already change the | |
1759 | state prior to saving it with MACHINE_STATE_SAVE. | |
1760 | ||
1761 | The parameter `ID' is a string identifying a unique macro use. | |
1762 | ||
1763 | On the i386 the initialization code at the begin of | |
1764 | function `__bb_trace_func' contains a `sub' instruction | |
1765 | therefore we handle save and restore of the flag register | |
78a0d70c ZW |
1766 | in the BLOCK_PROFILER macro. |
1767 | ||
1768 | Note that ebx, esi, and edi are callee-save, so we don't have to | |
1769 | preserve them explicitly. */ | |
6e753900 | 1770 | |
e075ae69 RH |
1771 | #define MACHINE_STATE_SAVE(ID) \ |
1772 | do { \ | |
1773 | register int eax_ __asm__("eax"); \ | |
1774 | register int ecx_ __asm__("ecx"); \ | |
1775 | register int edx_ __asm__("edx"); \ | |
78a0d70c ZW |
1776 | __asm__ __volatile__ ("\ |
1777 | push{l} %0\n\t\ | |
1778 | push{l} %1\n\t\ | |
1779 | push{l} %2" \ | |
1780 | : : "r"(eax_), "r"(ecx_), "r"(edx_)); \ | |
e075ae69 RH |
1781 | } while (0); |
1782 | ||
1783 | #define MACHINE_STATE_RESTORE(ID) \ | |
1784 | do { \ | |
1785 | register int eax_ __asm__("eax"); \ | |
1786 | register int ecx_ __asm__("ecx"); \ | |
1787 | register int edx_ __asm__("edx"); \ | |
78a0d70c ZW |
1788 | __asm__ __volatile__ ("\ |
1789 | pop{l} %2\n\t\ | |
1790 | pop{l} %1\n\t\ | |
1791 | pop{l} %0" \ | |
1792 | : "=r"(eax_), "=r"(ecx_), "=r"(edx_)); \ | |
e075ae69 | 1793 | } while (0); |
6e753900 | 1794 | |
c98f8742 JVA |
1795 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
1796 | the stack pointer does not matter. The value is tested only in | |
1797 | functions that have frame pointers. | |
1798 | No definition is equivalent to always zero. */ | |
1799 | /* Note on the 386 it might be more efficient not to define this since | |
1800 | we have to restore it ourselves from the frame pointer, in order to | |
1801 | use pop */ | |
1802 | ||
1803 | #define EXIT_IGNORE_STACK 1 | |
1804 | ||
c98f8742 JVA |
1805 | /* Output assembler code for a block containing the constant parts |
1806 | of a trampoline, leaving space for the variable parts. */ | |
1807 | ||
a269a03c | 1808 | /* On the 386, the trampoline contains two instructions: |
c98f8742 | 1809 | mov #STATIC,ecx |
a269a03c JC |
1810 | jmp FUNCTION |
1811 | The trampoline is generated entirely at runtime. The operand of JMP | |
1812 | is the address of FUNCTION relative to the instruction following the | |
1813 | JMP (which is 5 bytes long). */ | |
c98f8742 JVA |
1814 | |
1815 | /* Length in units of the trampoline for entering a nested function. */ | |
1816 | ||
39d04363 | 1817 | #define TRAMPOLINE_SIZE (TARGET_64BIT ? 23 : 10) |
c98f8742 JVA |
1818 | |
1819 | /* Emit RTL insns to initialize the variable parts of a trampoline. | |
1820 | FNADDR is an RTX for the address of the function's pure code. | |
1821 | CXT is an RTX for the static chain value for the function. */ | |
1822 | ||
1823 | #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ | |
39d04363 | 1824 | x86_initialize_trampoline (TRAMP, FNADDR, CXT) |
c98f8742 JVA |
1825 | \f |
1826 | /* Definitions for register eliminations. | |
1827 | ||
1828 | This is an array of structures. Each structure initializes one pair | |
1829 | of eliminable registers. The "from" register number is given first, | |
1830 | followed by "to". Eliminations of the same "from" register are listed | |
1831 | in order of preference. | |
1832 | ||
afc2cd05 NC |
1833 | There are two registers that can always be eliminated on the i386. |
1834 | The frame pointer and the arg pointer can be replaced by either the | |
1835 | hard frame pointer or to the stack pointer, depending upon the | |
1836 | circumstances. The hard frame pointer is not used before reload and | |
1837 | so it is not eligible for elimination. */ | |
c98f8742 | 1838 | |
564d80f4 JH |
1839 | #define ELIMINABLE_REGS \ |
1840 | {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1841 | { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
1842 | { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1843 | { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} \ | |
c98f8742 | 1844 | |
2c5a510c RH |
1845 | /* Given FROM and TO register numbers, say whether this elimination is |
1846 | allowed. Frame pointer elimination is automatically handled. | |
c98f8742 JVA |
1847 | |
1848 | All other eliminations are valid. */ | |
1849 | ||
2c5a510c RH |
1850 | #define CAN_ELIMINATE(FROM, TO) \ |
1851 | ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1) | |
c98f8742 JVA |
1852 | |
1853 | /* Define the offset between two registers, one to be eliminated, and the other | |
1854 | its replacement, at the start of a routine. */ | |
1855 | ||
1856 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
0903fcab | 1857 | (OFFSET) = ix86_initial_elimination_offset (FROM, TO) |
c98f8742 JVA |
1858 | \f |
1859 | /* Addressing modes, and classification of registers for them. */ | |
1860 | ||
940da324 JL |
1861 | /* #define HAVE_POST_INCREMENT 0 */ |
1862 | /* #define HAVE_POST_DECREMENT 0 */ | |
c98f8742 | 1863 | |
940da324 JL |
1864 | /* #define HAVE_PRE_DECREMENT 0 */ |
1865 | /* #define HAVE_PRE_INCREMENT 0 */ | |
c98f8742 JVA |
1866 | |
1867 | /* Macros to check register numbers against specific register classes. */ | |
1868 | ||
1869 | /* These assume that REGNO is a hard or pseudo reg number. | |
1870 | They give nonzero only if REGNO is a hard reg of the suitable class | |
1871 | or a pseudo reg currently allocated to a suitable hard reg. | |
1872 | Since they use reg_renumber, they are safe only once reg_renumber | |
1873 | has been allocated, which happens in local-alloc.c. */ | |
1874 | ||
3f3f2124 JH |
1875 | #define REGNO_OK_FOR_INDEX_P(REGNO) \ |
1876 | ((REGNO) < STACK_POINTER_REGNUM \ | |
1877 | || (REGNO >= FIRST_REX_INT_REG \ | |
1878 | && (REGNO) <= LAST_REX_INT_REG) \ | |
1879 | || ((unsigned) reg_renumber[REGNO] >= FIRST_REX_INT_REG \ | |
1880 | && (unsigned) reg_renumber[REGNO] <= LAST_REX_INT_REG) \ | |
c98f8742 JVA |
1881 | || (unsigned) reg_renumber[REGNO] < STACK_POINTER_REGNUM) |
1882 | ||
3f3f2124 JH |
1883 | #define REGNO_OK_FOR_BASE_P(REGNO) \ |
1884 | ((REGNO) <= STACK_POINTER_REGNUM \ | |
1885 | || (REGNO) == ARG_POINTER_REGNUM \ | |
1886 | || (REGNO) == FRAME_POINTER_REGNUM \ | |
1887 | || (REGNO >= FIRST_REX_INT_REG \ | |
1888 | && (REGNO) <= LAST_REX_INT_REG) \ | |
1889 | || ((unsigned) reg_renumber[REGNO] >= FIRST_REX_INT_REG \ | |
1890 | && (unsigned) reg_renumber[REGNO] <= LAST_REX_INT_REG) \ | |
c98f8742 JVA |
1891 | || (unsigned) reg_renumber[REGNO] <= STACK_POINTER_REGNUM) |
1892 | ||
1893 | #define REGNO_OK_FOR_SIREG_P(REGNO) ((REGNO) == 4 || reg_renumber[REGNO] == 4) | |
1894 | #define REGNO_OK_FOR_DIREG_P(REGNO) ((REGNO) == 5 || reg_renumber[REGNO] == 5) | |
1895 | ||
1896 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
1897 | and check its validity for a certain class. | |
1898 | We have two alternate definitions for each of them. | |
1899 | The usual definition accepts all pseudo regs; the other rejects | |
1900 | them unless they have been allocated suitable hard regs. | |
1901 | The symbol REG_OK_STRICT causes the latter definition to be used. | |
1902 | ||
1903 | Most source files want to accept pseudo regs in the hope that | |
1904 | they will get allocated to the class that the insn wants them to be in. | |
1905 | Source files for reload pass need to be strict. | |
1906 | After reload, it makes no difference, since pseudo regs have | |
1907 | been eliminated by then. */ | |
1908 | ||
c98f8742 | 1909 | |
3b3c6a3f MM |
1910 | /* Non strict versions, pseudos are ok */ |
1911 | #define REG_OK_FOR_INDEX_NONSTRICT_P(X) \ | |
1912 | (REGNO (X) < STACK_POINTER_REGNUM \ | |
3f3f2124 JH |
1913 | || (REGNO (X) >= FIRST_REX_INT_REG \ |
1914 | && REGNO (X) <= LAST_REX_INT_REG) \ | |
c98f8742 JVA |
1915 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
1916 | ||
3b3c6a3f MM |
1917 | #define REG_OK_FOR_BASE_NONSTRICT_P(X) \ |
1918 | (REGNO (X) <= STACK_POINTER_REGNUM \ | |
1919 | || REGNO (X) == ARG_POINTER_REGNUM \ | |
3f3f2124 JH |
1920 | || REGNO (X) == FRAME_POINTER_REGNUM \ |
1921 | || (REGNO (X) >= FIRST_REX_INT_REG \ | |
1922 | && REGNO (X) <= LAST_REX_INT_REG) \ | |
3b3c6a3f | 1923 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) |
c98f8742 | 1924 | |
3b3c6a3f MM |
1925 | /* Strict versions, hard registers only */ |
1926 | #define REG_OK_FOR_INDEX_STRICT_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
1927 | #define REG_OK_FOR_BASE_STRICT_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
c98f8742 | 1928 | |
3b3c6a3f MM |
1929 | #ifndef REG_OK_STRICT |
1930 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_NONSTRICT_P(X) | |
1931 | #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_NONSTRICT_P(X) | |
3b3c6a3f MM |
1932 | |
1933 | #else | |
1934 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_INDEX_STRICT_P(X) | |
1935 | #define REG_OK_FOR_BASE_P(X) REG_OK_FOR_BASE_STRICT_P(X) | |
c98f8742 JVA |
1936 | #endif |
1937 | ||
1938 | /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression | |
1939 | that is a valid memory address for an instruction. | |
1940 | The MODE argument is the machine mode for the MEM expression | |
1941 | that wants to use this address. | |
1942 | ||
1943 | The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS, | |
1944 | except for CONSTANT_ADDRESS_P which is usually machine-independent. | |
1945 | ||
1946 | See legitimize_pic_address in i386.c for details as to what | |
1947 | constitutes a legitimate address when -fpic is used. */ | |
1948 | ||
1949 | #define MAX_REGS_PER_ADDRESS 2 | |
1950 | ||
91bb873f RH |
1951 | #define CONSTANT_ADDRESS_P(X) \ |
1952 | (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ | |
d2836273 JH |
1953 | || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \ |
1954 | || GET_CODE (X) == CONST_DOUBLE) | |
c98f8742 JVA |
1955 | |
1956 | /* Nonzero if the constant value X is a legitimate general operand. | |
1957 | It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ | |
1958 | ||
d7a29404 | 1959 | #define LEGITIMATE_CONSTANT_P(X) 1 |
c98f8742 | 1960 | |
3b3c6a3f MM |
1961 | #ifdef REG_OK_STRICT |
1962 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
1963 | { \ | |
1964 | if (legitimate_address_p (MODE, X, 1)) \ | |
1965 | goto ADDR; \ | |
1966 | } | |
c98f8742 | 1967 | |
3b3c6a3f MM |
1968 | #else |
1969 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
c98f8742 | 1970 | { \ |
3b3c6a3f | 1971 | if (legitimate_address_p (MODE, X, 0)) \ |
c98f8742 | 1972 | goto ADDR; \ |
c98f8742 JVA |
1973 | } |
1974 | ||
3b3c6a3f MM |
1975 | #endif |
1976 | ||
b949ea8b JW |
1977 | /* If defined, a C expression to determine the base term of address X. |
1978 | This macro is used in only one place: `find_base_term' in alias.c. | |
1979 | ||
1980 | It is always safe for this macro to not be defined. It exists so | |
1981 | that alias analysis can understand machine-dependent addresses. | |
1982 | ||
1983 | The typical use of this macro is to handle addresses containing | |
1984 | a label_ref or symbol_ref within an UNSPEC. */ | |
1985 | ||
1986 | #define FIND_BASE_TERM(X) ix86_find_base_term (x) | |
1987 | ||
c98f8742 JVA |
1988 | /* Try machine-dependent ways of modifying an illegitimate address |
1989 | to be legitimate. If we find one, return the new, valid address. | |
1990 | This macro is used in only one place: `memory_address' in explow.c. | |
1991 | ||
1992 | OLDX is the address as it was before break_out_memory_refs was called. | |
1993 | In some cases it is useful to look at this to decide what needs to be done. | |
1994 | ||
1995 | MODE and WIN are passed so that this macro can use | |
1996 | GO_IF_LEGITIMATE_ADDRESS. | |
1997 | ||
1998 | It is always safe for this macro to do nothing. It exists to recognize | |
1999 | opportunities to optimize the output. | |
2000 | ||
2001 | For the 80386, we handle X+REG by loading X into a register R and | |
2002 | using R+REG. R will go in a general reg and indexing will be used. | |
2003 | However, if REG is a broken-out memory address or multiplication, | |
2004 | nothing needs to be done because REG can certainly go in a general reg. | |
2005 | ||
2006 | When -fpic is used, special handling is needed for symbolic references. | |
2007 | See comments by legitimize_pic_address in i386.c for details. */ | |
2008 | ||
3b3c6a3f MM |
2009 | #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \ |
2010 | { \ | |
3b3c6a3f MM |
2011 | (X) = legitimize_address (X, OLDX, MODE); \ |
2012 | if (memory_address_p (MODE, X)) \ | |
2013 | goto WIN; \ | |
2014 | } | |
c98f8742 | 2015 | |
d4ba09c0 SC |
2016 | #define REWRITE_ADDRESS(x) rewrite_address(x) |
2017 | ||
c98f8742 JVA |
2018 | /* Nonzero if the constant value X is a legitimate general operand |
2019 | when generating PIC code. It is given that flag_pic is on and | |
2020 | that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ | |
2021 | ||
e075ae69 RH |
2022 | #define LEGITIMATE_PIC_OPERAND_P(X) \ |
2023 | (! SYMBOLIC_CONST (X) \ | |
2024 | || legitimate_pic_address_disp_p (X)) | |
c98f8742 JVA |
2025 | |
2026 | #define SYMBOLIC_CONST(X) \ | |
2027 | (GET_CODE (X) == SYMBOL_REF \ | |
2028 | || GET_CODE (X) == LABEL_REF \ | |
2029 | || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X))) | |
2030 | ||
2031 | /* Go to LABEL if ADDR (a legitimate address expression) | |
2032 | has an effect that depends on the machine mode it is used for. | |
2033 | On the 80386, only postdecrement and postincrement address depend thus | |
2034 | (the amount of decrement or increment being the length of the operand). */ | |
2035 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ | |
2036 | if (GET_CODE (ADDR) == POST_INC || GET_CODE (ADDR) == POST_DEC) goto LABEL | |
2037 | \f | |
bd793c65 BS |
2038 | /* Codes for all the SSE/MMX builtins. */ |
2039 | enum ix86_builtins | |
2040 | { | |
2041 | IX86_BUILTIN_ADDPS, | |
2042 | IX86_BUILTIN_ADDSS, | |
2043 | IX86_BUILTIN_DIVPS, | |
2044 | IX86_BUILTIN_DIVSS, | |
2045 | IX86_BUILTIN_MULPS, | |
2046 | IX86_BUILTIN_MULSS, | |
2047 | IX86_BUILTIN_SUBPS, | |
2048 | IX86_BUILTIN_SUBSS, | |
2049 | ||
2050 | IX86_BUILTIN_CMPEQPS, | |
2051 | IX86_BUILTIN_CMPLTPS, | |
2052 | IX86_BUILTIN_CMPLEPS, | |
2053 | IX86_BUILTIN_CMPGTPS, | |
2054 | IX86_BUILTIN_CMPGEPS, | |
2055 | IX86_BUILTIN_CMPNEQPS, | |
2056 | IX86_BUILTIN_CMPNLTPS, | |
2057 | IX86_BUILTIN_CMPNLEPS, | |
2058 | IX86_BUILTIN_CMPNGTPS, | |
2059 | IX86_BUILTIN_CMPNGEPS, | |
2060 | IX86_BUILTIN_CMPORDPS, | |
2061 | IX86_BUILTIN_CMPUNORDPS, | |
2062 | IX86_BUILTIN_CMPNEPS, | |
2063 | IX86_BUILTIN_CMPEQSS, | |
2064 | IX86_BUILTIN_CMPLTSS, | |
2065 | IX86_BUILTIN_CMPLESS, | |
2066 | IX86_BUILTIN_CMPGTSS, | |
2067 | IX86_BUILTIN_CMPGESS, | |
2068 | IX86_BUILTIN_CMPNEQSS, | |
2069 | IX86_BUILTIN_CMPNLTSS, | |
2070 | IX86_BUILTIN_CMPNLESS, | |
2071 | IX86_BUILTIN_CMPNGTSS, | |
2072 | IX86_BUILTIN_CMPNGESS, | |
2073 | IX86_BUILTIN_CMPORDSS, | |
2074 | IX86_BUILTIN_CMPUNORDSS, | |
2075 | IX86_BUILTIN_CMPNESS, | |
2076 | ||
2077 | IX86_BUILTIN_COMIEQSS, | |
2078 | IX86_BUILTIN_COMILTSS, | |
2079 | IX86_BUILTIN_COMILESS, | |
2080 | IX86_BUILTIN_COMIGTSS, | |
2081 | IX86_BUILTIN_COMIGESS, | |
2082 | IX86_BUILTIN_COMINEQSS, | |
2083 | IX86_BUILTIN_UCOMIEQSS, | |
2084 | IX86_BUILTIN_UCOMILTSS, | |
2085 | IX86_BUILTIN_UCOMILESS, | |
2086 | IX86_BUILTIN_UCOMIGTSS, | |
2087 | IX86_BUILTIN_UCOMIGESS, | |
2088 | IX86_BUILTIN_UCOMINEQSS, | |
2089 | ||
2090 | IX86_BUILTIN_CVTPI2PS, | |
2091 | IX86_BUILTIN_CVTPS2PI, | |
2092 | IX86_BUILTIN_CVTSI2SS, | |
2093 | IX86_BUILTIN_CVTSS2SI, | |
2094 | IX86_BUILTIN_CVTTPS2PI, | |
2095 | IX86_BUILTIN_CVTTSS2SI, | |
2096 | IX86_BUILTIN_M_FROM_INT, | |
2097 | IX86_BUILTIN_M_TO_INT, | |
2098 | ||
2099 | IX86_BUILTIN_MAXPS, | |
2100 | IX86_BUILTIN_MAXSS, | |
2101 | IX86_BUILTIN_MINPS, | |
2102 | IX86_BUILTIN_MINSS, | |
2103 | ||
2104 | IX86_BUILTIN_LOADAPS, | |
2105 | IX86_BUILTIN_LOADUPS, | |
2106 | IX86_BUILTIN_STOREAPS, | |
2107 | IX86_BUILTIN_STOREUPS, | |
2108 | IX86_BUILTIN_LOADSS, | |
2109 | IX86_BUILTIN_STORESS, | |
2110 | IX86_BUILTIN_MOVSS, | |
2111 | ||
2112 | IX86_BUILTIN_MOVHLPS, | |
2113 | IX86_BUILTIN_MOVLHPS, | |
2114 | IX86_BUILTIN_LOADHPS, | |
2115 | IX86_BUILTIN_LOADLPS, | |
2116 | IX86_BUILTIN_STOREHPS, | |
2117 | IX86_BUILTIN_STORELPS, | |
2118 | ||
2119 | IX86_BUILTIN_MASKMOVQ, | |
2120 | IX86_BUILTIN_MOVMSKPS, | |
2121 | IX86_BUILTIN_PMOVMSKB, | |
2122 | ||
2123 | IX86_BUILTIN_MOVNTPS, | |
2124 | IX86_BUILTIN_MOVNTQ, | |
2125 | ||
2126 | IX86_BUILTIN_PACKSSWB, | |
2127 | IX86_BUILTIN_PACKSSDW, | |
2128 | IX86_BUILTIN_PACKUSWB, | |
2129 | ||
2130 | IX86_BUILTIN_PADDB, | |
2131 | IX86_BUILTIN_PADDW, | |
2132 | IX86_BUILTIN_PADDD, | |
2133 | IX86_BUILTIN_PADDSB, | |
2134 | IX86_BUILTIN_PADDSW, | |
2135 | IX86_BUILTIN_PADDUSB, | |
2136 | IX86_BUILTIN_PADDUSW, | |
2137 | IX86_BUILTIN_PSUBB, | |
2138 | IX86_BUILTIN_PSUBW, | |
2139 | IX86_BUILTIN_PSUBD, | |
2140 | IX86_BUILTIN_PSUBSB, | |
2141 | IX86_BUILTIN_PSUBSW, | |
2142 | IX86_BUILTIN_PSUBUSB, | |
2143 | IX86_BUILTIN_PSUBUSW, | |
2144 | ||
2145 | IX86_BUILTIN_PAND, | |
2146 | IX86_BUILTIN_PANDN, | |
2147 | IX86_BUILTIN_POR, | |
2148 | IX86_BUILTIN_PXOR, | |
2149 | ||
2150 | IX86_BUILTIN_PAVGB, | |
2151 | IX86_BUILTIN_PAVGW, | |
2152 | ||
2153 | IX86_BUILTIN_PCMPEQB, | |
2154 | IX86_BUILTIN_PCMPEQW, | |
2155 | IX86_BUILTIN_PCMPEQD, | |
2156 | IX86_BUILTIN_PCMPGTB, | |
2157 | IX86_BUILTIN_PCMPGTW, | |
2158 | IX86_BUILTIN_PCMPGTD, | |
2159 | ||
2160 | IX86_BUILTIN_PEXTRW, | |
2161 | IX86_BUILTIN_PINSRW, | |
2162 | ||
2163 | IX86_BUILTIN_PMADDWD, | |
2164 | ||
2165 | IX86_BUILTIN_PMAXSW, | |
2166 | IX86_BUILTIN_PMAXUB, | |
2167 | IX86_BUILTIN_PMINSW, | |
2168 | IX86_BUILTIN_PMINUB, | |
2169 | ||
2170 | IX86_BUILTIN_PMULHUW, | |
2171 | IX86_BUILTIN_PMULHW, | |
2172 | IX86_BUILTIN_PMULLW, | |
2173 | ||
2174 | IX86_BUILTIN_PSADBW, | |
2175 | IX86_BUILTIN_PSHUFW, | |
2176 | ||
2177 | IX86_BUILTIN_PSLLW, | |
2178 | IX86_BUILTIN_PSLLD, | |
2179 | IX86_BUILTIN_PSLLQ, | |
2180 | IX86_BUILTIN_PSRAW, | |
2181 | IX86_BUILTIN_PSRAD, | |
2182 | IX86_BUILTIN_PSRLW, | |
2183 | IX86_BUILTIN_PSRLD, | |
2184 | IX86_BUILTIN_PSRLQ, | |
2185 | IX86_BUILTIN_PSLLWI, | |
2186 | IX86_BUILTIN_PSLLDI, | |
2187 | IX86_BUILTIN_PSLLQI, | |
2188 | IX86_BUILTIN_PSRAWI, | |
2189 | IX86_BUILTIN_PSRADI, | |
2190 | IX86_BUILTIN_PSRLWI, | |
2191 | IX86_BUILTIN_PSRLDI, | |
2192 | IX86_BUILTIN_PSRLQI, | |
2193 | ||
2194 | IX86_BUILTIN_PUNPCKHBW, | |
2195 | IX86_BUILTIN_PUNPCKHWD, | |
2196 | IX86_BUILTIN_PUNPCKHDQ, | |
2197 | IX86_BUILTIN_PUNPCKLBW, | |
2198 | IX86_BUILTIN_PUNPCKLWD, | |
2199 | IX86_BUILTIN_PUNPCKLDQ, | |
2200 | ||
2201 | IX86_BUILTIN_SHUFPS, | |
2202 | ||
2203 | IX86_BUILTIN_RCPPS, | |
2204 | IX86_BUILTIN_RCPSS, | |
2205 | IX86_BUILTIN_RSQRTPS, | |
2206 | IX86_BUILTIN_RSQRTSS, | |
2207 | IX86_BUILTIN_SQRTPS, | |
2208 | IX86_BUILTIN_SQRTSS, | |
2209 | ||
2210 | IX86_BUILTIN_UNPCKHPS, | |
2211 | IX86_BUILTIN_UNPCKLPS, | |
2212 | ||
2213 | IX86_BUILTIN_ANDPS, | |
2214 | IX86_BUILTIN_ANDNPS, | |
2215 | IX86_BUILTIN_ORPS, | |
2216 | IX86_BUILTIN_XORPS, | |
2217 | ||
2218 | IX86_BUILTIN_EMMS, | |
2219 | IX86_BUILTIN_LDMXCSR, | |
2220 | IX86_BUILTIN_STMXCSR, | |
2221 | IX86_BUILTIN_SFENCE, | |
2222 | IX86_BUILTIN_PREFETCH, | |
2223 | ||
47f339cf BS |
2224 | /* 3DNow! Original */ |
2225 | IX86_BUILTIN_FEMMS, | |
2226 | IX86_BUILTIN_PAVGUSB, | |
2227 | IX86_BUILTIN_PF2ID, | |
2228 | IX86_BUILTIN_PFACC, | |
2229 | IX86_BUILTIN_PFADD, | |
2230 | IX86_BUILTIN_PFCMPEQ, | |
2231 | IX86_BUILTIN_PFCMPGE, | |
2232 | IX86_BUILTIN_PFCMPGT, | |
2233 | IX86_BUILTIN_PFMAX, | |
2234 | IX86_BUILTIN_PFMIN, | |
2235 | IX86_BUILTIN_PFMUL, | |
2236 | IX86_BUILTIN_PFRCP, | |
2237 | IX86_BUILTIN_PFRCPIT1, | |
2238 | IX86_BUILTIN_PFRCPIT2, | |
2239 | IX86_BUILTIN_PFRSQIT1, | |
2240 | IX86_BUILTIN_PFRSQRT, | |
2241 | IX86_BUILTIN_PFSUB, | |
2242 | IX86_BUILTIN_PFSUBR, | |
2243 | IX86_BUILTIN_PI2FD, | |
2244 | IX86_BUILTIN_PMULHRW, | |
2245 | IX86_BUILTIN_PREFETCH_3DNOW, /* PREFETCH already used */ | |
2246 | IX86_BUILTIN_PREFETCHW, | |
2247 | ||
2248 | /* 3DNow! Athlon Extensions */ | |
2249 | IX86_BUILTIN_PF2IW, | |
2250 | IX86_BUILTIN_PFNACC, | |
2251 | IX86_BUILTIN_PFPNACC, | |
2252 | IX86_BUILTIN_PI2FW, | |
2253 | IX86_BUILTIN_PSWAPDSI, | |
2254 | IX86_BUILTIN_PSWAPDSF, | |
2255 | ||
bd793c65 BS |
2256 | /* Composite builtins, expand to more than one insn. */ |
2257 | IX86_BUILTIN_SETPS1, | |
2258 | IX86_BUILTIN_SETPS, | |
2259 | IX86_BUILTIN_CLRPS, | |
2260 | IX86_BUILTIN_SETRPS, | |
2261 | IX86_BUILTIN_LOADPS1, | |
2262 | IX86_BUILTIN_LOADRPS, | |
2263 | IX86_BUILTIN_STOREPS1, | |
2264 | IX86_BUILTIN_STORERPS, | |
2265 | ||
2266 | IX86_BUILTIN_MMX_ZERO, | |
2267 | ||
2268 | IX86_BUILTIN_MAX | |
2269 | }; | |
bd793c65 | 2270 | \f |
c98f8742 JVA |
2271 | /* Define this macro if references to a symbol must be treated |
2272 | differently depending on something about the variable or | |
2273 | function named by the symbol (such as what section it is in). | |
2274 | ||
b4ac57ab | 2275 | On i386, if using PIC, mark a SYMBOL_REF for a non-global symbol |
c98f8742 JVA |
2276 | so that we may access it directly in the GOT. */ |
2277 | ||
90e0ee00 AH |
2278 | #define ENCODE_SECTION_INFO(DECL) \ |
2279 | do \ | |
2280 | { \ | |
2281 | if (flag_pic) \ | |
2282 | { \ | |
2283 | rtx rtl = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \ | |
2284 | ? TREE_CST_RTL (DECL) : DECL_RTL (DECL)); \ | |
2285 | \ | |
2286 | if (GET_CODE (rtl) == MEM) \ | |
2287 | { \ | |
2288 | if (TARGET_DEBUG_ADDR \ | |
2289 | && TREE_CODE_CLASS (TREE_CODE (DECL)) == 'd') \ | |
2290 | { \ | |
2291 | fprintf (stderr, "Encode %s, public = %d\n", \ | |
2292 | IDENTIFIER_POINTER (DECL_NAME (DECL)), \ | |
2293 | TREE_PUBLIC (DECL)); \ | |
2294 | } \ | |
2295 | \ | |
2296 | SYMBOL_REF_FLAG (XEXP (rtl, 0)) \ | |
2297 | = (TREE_CODE_CLASS (TREE_CODE (DECL)) != 'd' \ | |
2298 | || ! TREE_PUBLIC (DECL)); \ | |
2299 | } \ | |
2300 | } \ | |
2301 | } \ | |
c98f8742 | 2302 | while (0) |
d398b3b1 | 2303 | |
638b724c MM |
2304 | /* The `FINALIZE_PIC' macro serves as a hook to emit these special |
2305 | codes once the function is being compiled into assembly code, but | |
2306 | not before. (It is not done before, because in the case of | |
2307 | compiling an inline function, it would lead to multiple PIC | |
2308 | prologues being included in functions which used inline functions | |
2309 | and were compiled to assembly language.) */ | |
2310 | ||
2311 | #define FINALIZE_PIC \ | |
2312 | do \ | |
2313 | { \ | |
638b724c MM |
2314 | current_function_uses_pic_offset_table |= profile_flag | profile_block_flag; \ |
2315 | } \ | |
2316 | while (0) | |
2317 | ||
b08de47e | 2318 | \f |
b08de47e MM |
2319 | /* Max number of args passed in registers. If this is more than 3, we will |
2320 | have problems with ebx (register #4), since it is a caller save register and | |
2321 | is also used as the pic register in ELF. So for now, don't allow more than | |
2322 | 3 registers to be passed in registers. */ | |
2323 | ||
d2836273 JH |
2324 | #define REGPARM_MAX (TARGET_64BIT ? 6 : 3) |
2325 | ||
2326 | #define SSE_REGPARM_MAX (TARGET_64BIT ? 16 : 0) | |
b08de47e | 2327 | |
c98f8742 JVA |
2328 | \f |
2329 | /* Specify the machine mode that this machine uses | |
2330 | for the index in the tablejump instruction. */ | |
6eb791fc | 2331 | #define CASE_VECTOR_MODE (!TARGET_64BIT || flag_pic ? SImode : DImode) |
c98f8742 | 2332 | |
18543a22 ILT |
2333 | /* Define as C expression which evaluates to nonzero if the tablejump |
2334 | instruction expects the table to contain offsets from the address of the | |
2335 | table. | |
2336 | Do not define this if the table should contain absolute addresses. */ | |
2337 | /* #define CASE_VECTOR_PC_RELATIVE 1 */ | |
c98f8742 JVA |
2338 | |
2339 | /* Specify the tree operation to be used to convert reals to integers. | |
2340 | This should be changed to take advantage of fist --wfs ?? | |
2341 | */ | |
2342 | #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR | |
2343 | ||
2344 | /* This is the kind of divide that is easiest to do in the general case. */ | |
2345 | #define EASY_DIV_EXPR TRUNC_DIV_EXPR | |
2346 | ||
2347 | /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
2348 | #define DEFAULT_SIGNED_CHAR 1 | |
2349 | ||
2350 | /* Max number of bytes we can move from memory to memory | |
2351 | in one reasonably fast instruction. */ | |
65d9c0ab JH |
2352 | #define MOVE_MAX 16 |
2353 | ||
2354 | /* MOVE_MAX_PIECES is the number of bytes at a time which we can | |
2355 | move efficiently, as opposed to MOVE_MAX which is the maximum | |
2356 | number of bytes we can move with a single instruction. */ | |
2357 | #define MOVE_MAX_PIECES (TARGET_64BIT ? 8 : 4) | |
c98f8742 | 2358 | |
7e24ffc9 HPN |
2359 | /* If a memory-to-memory move would take MOVE_RATIO or more simple |
2360 | move-instruction pairs, we will do a movstr or libcall instead. | |
2361 | Increasing the value will always make code faster, but eventually | |
2362 | incurs high cost in increased code size. | |
c98f8742 | 2363 | |
e2e52e1b | 2364 | If you don't define this, a reasonable default is used. */ |
c98f8742 | 2365 | |
e2e52e1b | 2366 | #define MOVE_RATIO (optimize_size ? 3 : ix86_cost->move_ratio) |
c98f8742 JVA |
2367 | |
2368 | /* Define if shifts truncate the shift count | |
2369 | which implies one can omit a sign-extension or zero-extension | |
2370 | of a shift count. */ | |
241e1a89 | 2371 | /* On i386, shifts do truncate the count. But bit opcodes don't. */ |
c98f8742 JVA |
2372 | |
2373 | /* #define SHIFT_COUNT_TRUNCATED */ | |
2374 | ||
2375 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
2376 | is done just by pretending it is already truncated. */ | |
2377 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
2378 | ||
2379 | /* We assume that the store-condition-codes instructions store 0 for false | |
2380 | and some other value for true. This is the value stored for true. */ | |
2381 | ||
2382 | #define STORE_FLAG_VALUE 1 | |
2383 | ||
2384 | /* When a prototype says `char' or `short', really pass an `int'. | |
2385 | (The 386 can't easily push less than an int.) */ | |
2386 | ||
cb560352 | 2387 | #define PROMOTE_PROTOTYPES 1 |
c98f8742 | 2388 | |
d9f32422 JH |
2389 | /* A macro to update M and UNSIGNEDP when an object whose type is |
2390 | TYPE and which has the specified mode and signedness is to be | |
2391 | stored in a register. This macro is only called when TYPE is a | |
2392 | scalar type. | |
2393 | ||
2394 | On i386 it is sometimes usefull to promote HImode and QImode | |
2395 | quantities to SImode. The choice depends on target type. */ | |
2396 | ||
2397 | #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ | |
2398 | if (((MODE) == HImode && TARGET_PROMOTE_HI_REGS) \ | |
2399 | || ((MODE) == QImode && TARGET_PROMOTE_QI_REGS)) \ | |
2400 | (MODE) = SImode; | |
2401 | ||
c98f8742 JVA |
2402 | /* Specify the machine mode that pointers have. |
2403 | After generation of rtl, the compiler makes no further distinction | |
2404 | between pointers and any other objects of this machine mode. */ | |
65d9c0ab | 2405 | #define Pmode (TARGET_64BIT ? DImode : SImode) |
c98f8742 JVA |
2406 | |
2407 | /* A function address in a call instruction | |
2408 | is a byte address (for indexing purposes) | |
2409 | so give the MEM rtx a byte's mode. */ | |
2410 | #define FUNCTION_MODE QImode | |
d4ba09c0 SC |
2411 | \f |
2412 | /* A part of a C `switch' statement that describes the relative costs | |
2413 | of constant RTL expressions. It must contain `case' labels for | |
2414 | expression codes `const_int', `const', `symbol_ref', `label_ref' | |
2415 | and `const_double'. Each case must ultimately reach a `return' | |
2416 | statement to return the relative cost of the use of that kind of | |
2417 | constant value in an expression. The cost may depend on the | |
2418 | precise value of the constant, which is available for examination | |
2419 | in X, and the rtx code of the expression in which it is contained, | |
2420 | found in OUTER_CODE. | |
2421 | ||
2422 | CODE is the expression code--redundant, since it can be obtained | |
2423 | with `GET_CODE (X)'. */ | |
c98f8742 | 2424 | |
3bb22aee | 2425 | #define CONST_COSTS(RTX,CODE,OUTER_CODE) \ |
c98f8742 JVA |
2426 | case CONST_INT: \ |
2427 | case CONST: \ | |
2428 | case LABEL_REF: \ | |
2429 | case SYMBOL_REF: \ | |
1acc845e | 2430 | return flag_pic && SYMBOLIC_CONST (RTX) ? 1 : 0; \ |
d4ba09c0 | 2431 | \ |
c98f8742 JVA |
2432 | case CONST_DOUBLE: \ |
2433 | { \ | |
7488be4e JVA |
2434 | int code; \ |
2435 | if (GET_MODE (RTX) == VOIDmode) \ | |
1acc845e | 2436 | return 0; \ |
d4ba09c0 | 2437 | \ |
7488be4e | 2438 | code = standard_80387_constant_p (RTX); \ |
1acc845e JH |
2439 | return code == 1 ? 1 : \ |
2440 | code == 2 ? 2 : \ | |
2441 | 3; \ | |
3bb22aee | 2442 | } |
c98f8742 | 2443 | |
76565a24 | 2444 | /* Delete the definition here when TOPLEVEL_COSTS_N_INSNS gets added to cse.c */ |
e075ae69 RH |
2445 | #define TOPLEVEL_COSTS_N_INSNS(N) \ |
2446 | do { total = COSTS_N_INSNS (N); goto egress_rtx_costs; } while (0) | |
76565a24 | 2447 | |
d4ba09c0 SC |
2448 | /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. |
2449 | This can be used, for example, to indicate how costly a multiply | |
2450 | instruction is. In writing this macro, you can use the construct | |
2451 | `COSTS_N_INSNS (N)' to specify a cost equal to N fast | |
2452 | instructions. OUTER_CODE is the code of the expression in which X | |
2453 | is contained. | |
2454 | ||
2455 | This macro is optional; do not define it if the default cost | |
2456 | assumptions are adequate for the target machine. */ | |
2457 | ||
2458 | #define RTX_COSTS(X,CODE,OUTER_CODE) \ | |
2459 | case ASHIFT: \ | |
2460 | if (GET_CODE (XEXP (X, 1)) == CONST_INT \ | |
2461 | && GET_MODE (XEXP (X, 0)) == SImode) \ | |
2462 | { \ | |
2463 | HOST_WIDE_INT value = INTVAL (XEXP (X, 1)); \ | |
d4ba09c0 | 2464 | if (value == 1) \ |
e075ae69 | 2465 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->add); \ |
d4ba09c0 | 2466 | if (value == 2 || value == 3) \ |
e075ae69 | 2467 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->lea); \ |
d4ba09c0 SC |
2468 | } \ |
2469 | /* fall through */ \ | |
2470 | \ | |
2471 | case ROTATE: \ | |
2472 | case ASHIFTRT: \ | |
2473 | case LSHIFTRT: \ | |
2474 | case ROTATERT: \ | |
76565a24 SC |
2475 | if (GET_MODE (XEXP (X, 0)) == DImode) \ |
2476 | { \ | |
2477 | if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
54d26233 MH |
2478 | { \ |
2479 | if (INTVAL (XEXP (X, 1)) > 32) \ | |
e075ae69 RH |
2480 | TOPLEVEL_COSTS_N_INSNS(ix86_cost->shift_const + 2); \ |
2481 | else \ | |
2482 | TOPLEVEL_COSTS_N_INSNS(ix86_cost->shift_const * 2); \ | |
2483 | } \ | |
2484 | else \ | |
2485 | { \ | |
2486 | if (GET_CODE (XEXP (X, 1)) == AND) \ | |
2487 | TOPLEVEL_COSTS_N_INSNS(ix86_cost->shift_var * 2); \ | |
2488 | else \ | |
2489 | TOPLEVEL_COSTS_N_INSNS(ix86_cost->shift_var * 6 + 2); \ | |
54d26233 | 2490 | } \ |
76565a24 | 2491 | } \ |
e075ae69 RH |
2492 | else \ |
2493 | { \ | |
2494 | if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
2495 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->shift_const); \ | |
2496 | else \ | |
2497 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->shift_var); \ | |
2498 | } \ | |
2499 | break; \ | |
d4ba09c0 SC |
2500 | \ |
2501 | case MULT: \ | |
2502 | if (GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
2503 | { \ | |
2504 | unsigned HOST_WIDE_INT value = INTVAL (XEXP (X, 1)); \ | |
2505 | int nbits = 0; \ | |
2506 | \ | |
2507 | while (value != 0) \ | |
2508 | { \ | |
2509 | nbits++; \ | |
2510 | value >>= 1; \ | |
2511 | } \ | |
2512 | \ | |
630c79be BS |
2513 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->mult_init \ |
2514 | + nbits * ix86_cost->mult_bit); \ | |
d4ba09c0 | 2515 | } \ |
d4ba09c0 | 2516 | else /* This is arbitrary */ \ |
76565a24 SC |
2517 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->mult_init \ |
2518 | + 7 * ix86_cost->mult_bit); \ | |
d4ba09c0 SC |
2519 | \ |
2520 | case DIV: \ | |
2521 | case UDIV: \ | |
2522 | case MOD: \ | |
2523 | case UMOD: \ | |
76565a24 | 2524 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->divide); \ |
d4ba09c0 SC |
2525 | \ |
2526 | case PLUS: \ | |
e075ae69 RH |
2527 | if (GET_CODE (XEXP (X, 0)) == PLUS \ |
2528 | && GET_CODE (XEXP (XEXP (X, 0), 0)) == MULT \ | |
2529 | && GET_CODE (XEXP (XEXP (XEXP (X, 0), 0), 1)) == CONST_INT \ | |
2530 | && GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
2531 | { \ | |
2532 | HOST_WIDE_INT val = INTVAL (XEXP (XEXP (XEXP (X, 0), 0), 1)); \ | |
2533 | if (val == 2 || val == 4 || val == 8) \ | |
2534 | { \ | |
2535 | return (COSTS_N_INSNS (ix86_cost->lea) \ | |
2536 | + rtx_cost (XEXP (XEXP (X, 0), 1), OUTER_CODE) \ | |
2537 | + rtx_cost (XEXP (XEXP (XEXP (X, 0), 0), 0), OUTER_CODE) \ | |
2538 | + rtx_cost (XEXP (X, 1), OUTER_CODE)); \ | |
2539 | } \ | |
2540 | } \ | |
2541 | else if (GET_CODE (XEXP (X, 0)) == MULT \ | |
2542 | && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT) \ | |
2543 | { \ | |
2544 | HOST_WIDE_INT val = INTVAL (XEXP (XEXP (X, 0), 1)); \ | |
2545 | if (val == 2 || val == 4 || val == 8) \ | |
2546 | { \ | |
2547 | return (COSTS_N_INSNS (ix86_cost->lea) \ | |
2548 | + rtx_cost (XEXP (XEXP (X, 0), 0), OUTER_CODE) \ | |
2549 | + rtx_cost (XEXP (X, 1), OUTER_CODE)); \ | |
2550 | } \ | |
2551 | } \ | |
2552 | else if (GET_CODE (XEXP (X, 0)) == PLUS) \ | |
2553 | { \ | |
2554 | return (COSTS_N_INSNS (ix86_cost->lea) \ | |
2555 | + rtx_cost (XEXP (XEXP (X, 0), 0), OUTER_CODE) \ | |
2556 | + rtx_cost (XEXP (XEXP (X, 0), 1), OUTER_CODE) \ | |
2557 | + rtx_cost (XEXP (X, 1), OUTER_CODE)); \ | |
2558 | } \ | |
d4ba09c0 SC |
2559 | \ |
2560 | /* fall through */ \ | |
2561 | case AND: \ | |
2562 | case IOR: \ | |
2563 | case XOR: \ | |
2564 | case MINUS: \ | |
76565a24 | 2565 | if (GET_MODE (X) == DImode) \ |
e075ae69 RH |
2566 | return (COSTS_N_INSNS (ix86_cost->add) * 2 \ |
2567 | + (rtx_cost (XEXP (X, 0), OUTER_CODE) \ | |
2568 | << (GET_MODE (XEXP (X, 0)) != DImode)) \ | |
2569 | + (rtx_cost (XEXP (X, 1), OUTER_CODE) \ | |
2570 | << (GET_MODE (XEXP (X, 1)) != DImode))); \ | |
2571 | \ | |
2572 | /* fall through */ \ | |
d4ba09c0 SC |
2573 | case NEG: \ |
2574 | case NOT: \ | |
76565a24 | 2575 | if (GET_MODE (X) == DImode) \ |
e075ae69 RH |
2576 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->add * 2); \ |
2577 | TOPLEVEL_COSTS_N_INSNS (ix86_cost->add); \ | |
2578 | \ | |
2579 | egress_rtx_costs: \ | |
2580 | break; | |
d4ba09c0 SC |
2581 | |
2582 | ||
2583 | /* An expression giving the cost of an addressing mode that contains | |
2584 | ADDRESS. If not defined, the cost is computed from the ADDRESS | |
2585 | expression and the `CONST_COSTS' values. | |
2586 | ||
2587 | For most CISC machines, the default cost is a good approximation | |
2588 | of the true cost of the addressing mode. However, on RISC | |
2589 | machines, all instructions normally have the same length and | |
2590 | execution time. Hence all addresses will have equal costs. | |
2591 | ||
2592 | In cases where more than one form of an address is known, the form | |
2593 | with the lowest cost will be used. If multiple forms have the | |
2594 | same, lowest, cost, the one that is the most complex will be used. | |
2595 | ||
2596 | For example, suppose an address that is equal to the sum of a | |
2597 | register and a constant is used twice in the same basic block. | |
2598 | When this macro is not defined, the address will be computed in a | |
2599 | register and memory references will be indirect through that | |
2600 | register. On machines where the cost of the addressing mode | |
2601 | containing the sum is no higher than that of a simple indirect | |
2602 | reference, this will produce an additional instruction and | |
2603 | possibly require an additional register. Proper specification of | |
2604 | this macro eliminates this overhead for such machines. | |
2605 | ||
2606 | Similar use of this macro is made in strength reduction of loops. | |
2607 | ||
2608 | ADDRESS need not be valid as an address. In such a case, the cost | |
2609 | is not relevant and can be any value; invalid addresses need not be | |
2610 | assigned a different cost. | |
2611 | ||
2612 | On machines where an address involving more than one register is as | |
2613 | cheap as an address computation involving only one register, | |
2614 | defining `ADDRESS_COST' to reflect this can cause two registers to | |
2615 | be live over a region of code where only one would have been if | |
2616 | `ADDRESS_COST' were not defined in that manner. This effect should | |
2617 | be considered in the definition of this macro. Equivalent costs | |
2618 | should probably only be given to addresses with different numbers | |
2619 | of registers on machines with lots of registers. | |
2620 | ||
2621 | This macro will normally either not be defined or be defined as a | |
2622 | constant. | |
c98f8742 JVA |
2623 | |
2624 | For i386, it is better to use a complex address than let gcc copy | |
2625 | the address into a reg and make a new pseudo. But not if the address | |
2626 | requires to two regs - that would mean more pseudos with longer | |
2627 | lifetimes. */ | |
2628 | ||
2629 | #define ADDRESS_COST(RTX) \ | |
0806f95f | 2630 | ix86_address_cost (RTX) |
d4ba09c0 | 2631 | |
96e7ae40 JH |
2632 | /* A C expression for the cost of moving data from a register in class FROM to |
2633 | one in class TO. The classes are expressed using the enumeration values | |
2634 | such as `GENERAL_REGS'. A value of 2 is the default; other values are | |
2635 | interpreted relative to that. | |
d4ba09c0 | 2636 | |
96e7ae40 JH |
2637 | It is not required that the cost always equal 2 when FROM is the same as TO; |
2638 | on some machines it is expensive to move between registers if they are not | |
f84aa48a | 2639 | general registers. */ |
d4ba09c0 | 2640 | |
f84aa48a | 2641 | #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ |
e76d65d2 | 2642 | ix86_register_move_cost (MODE, CLASS1, CLASS2) |
d4ba09c0 SC |
2643 | |
2644 | /* A C expression for the cost of moving data of mode M between a | |
2645 | register and memory. A value of 2 is the default; this cost is | |
2646 | relative to those in `REGISTER_MOVE_COST'. | |
2647 | ||
2648 | If moving between registers and memory is more expensive than | |
2649 | between two registers, you should define this macro to express the | |
fa79946e | 2650 | relative cost. */ |
d4ba09c0 | 2651 | |
fa79946e JH |
2652 | #define MEMORY_MOVE_COST(MODE,CLASS,IN) \ |
2653 | ix86_memory_move_cost (MODE, CLASS, IN) | |
d4ba09c0 SC |
2654 | |
2655 | /* A C expression for the cost of a branch instruction. A value of 1 | |
2656 | is the default; other values are interpreted relative to that. */ | |
2657 | ||
e075ae69 | 2658 | #define BRANCH_COST ix86_branch_cost |
d4ba09c0 SC |
2659 | |
2660 | /* Define this macro as a C expression which is nonzero if accessing | |
2661 | less than a word of memory (i.e. a `char' or a `short') is no | |
2662 | faster than accessing a word of memory, i.e., if such access | |
2663 | require more than one instruction or if there is no difference in | |
2664 | cost between byte and (aligned) word loads. | |
2665 | ||
2666 | When this macro is not defined, the compiler will access a field by | |
2667 | finding the smallest containing object; when it is defined, a | |
2668 | fullword load will be used if alignment permits. Unless bytes | |
2669 | accesses are faster than word accesses, using word accesses is | |
2670 | preferable since it may eliminate subsequent memory access if | |
2671 | subsequent accesses occur to other fields in the same word of the | |
2672 | structure, but to different bytes. */ | |
2673 | ||
2674 | #define SLOW_BYTE_ACCESS 0 | |
2675 | ||
2676 | /* Nonzero if access to memory by shorts is slow and undesirable. */ | |
2677 | #define SLOW_SHORT_ACCESS 0 | |
2678 | ||
2679 | /* Define this macro if zero-extension (of a `char' or `short' to an | |
2680 | `int') can be done faster if the destination is a register that is | |
2681 | known to be zero. | |
2682 | ||
2683 | If you define this macro, you must have instruction patterns that | |
2684 | recognize RTL structures like this: | |
2685 | ||
2686 | (set (strict_low_part (subreg:QI (reg:SI ...) 0)) ...) | |
2687 | ||
2688 | and likewise for `HImode'. */ | |
2689 | ||
2690 | /* #define SLOW_ZERO_EXTEND */ | |
2691 | ||
2692 | /* Define this macro to be the value 1 if unaligned accesses have a | |
2693 | cost many times greater than aligned accesses, for example if they | |
2694 | are emulated in a trap handler. | |
2695 | ||
2696 | When this macro is non-zero, the compiler will act as if | |
2697 | `STRICT_ALIGNMENT' were non-zero when generating code for block | |
2698 | moves. This can cause significantly more instructions to be | |
2699 | produced. Therefore, do not set this macro non-zero if unaligned | |
2700 | accesses only add a cycle or two to the time for a memory access. | |
2701 | ||
2702 | If the value of this macro is always zero, it need not be defined. */ | |
2703 | ||
e1565e65 | 2704 | /* #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 0 */ |
d4ba09c0 SC |
2705 | |
2706 | /* Define this macro to inhibit strength reduction of memory | |
2707 | addresses. (On some machines, such strength reduction seems to do | |
2708 | harm rather than good.) */ | |
2709 | ||
2710 | /* #define DONT_REDUCE_ADDR */ | |
2711 | ||
2712 | /* Define this macro if it is as good or better to call a constant | |
2713 | function address than to call an address kept in a register. | |
2714 | ||
2715 | Desirable on the 386 because a CALL with a constant address is | |
2716 | faster than one with a register address. */ | |
2717 | ||
2718 | #define NO_FUNCTION_CSE | |
2719 | ||
2720 | /* Define this macro if it is as good or better for a function to call | |
2721 | itself with an explicit address than to call an address kept in a | |
2722 | register. */ | |
2723 | ||
2724 | #define NO_RECURSIVE_FUNCTION_CSE | |
c98f8742 | 2725 | \f |
c572e5ba JVA |
2726 | /* Add any extra modes needed to represent the condition code. |
2727 | ||
e075ae69 RH |
2728 | For the i386, we need separate modes when floating-point |
2729 | equality comparisons are being done. | |
9076b9c1 JH |
2730 | |
2731 | Add CCNO to indicate comparisons against zero that requires | |
7e08e190 JH |
2732 | Overflow flag to be unset. Sign bit test is used instead and |
2733 | thus can be used to form "a&b>0" type of tests. | |
9076b9c1 JH |
2734 | |
2735 | Add CCGC to indicate comparisons agains zero that allows | |
2736 | unspecified garbage in the Carry flag. This mode is used | |
2737 | by inc/dec instructions. | |
e075ae69 | 2738 | |
2c873473 | 2739 | Add CCGOC to indicate comparisons agains zero that allows |
9076b9c1 JH |
2740 | unspecified garbage in the Carry and Overflow flag. This |
2741 | mode is used to simulate comparisons of (a-b) and (a+b) | |
2742 | against zero using sub/cmp/add operations. | |
16189740 | 2743 | |
7e08e190 | 2744 | Add CCZ to indicate that only the Zero flag is valid. */ |
c572e5ba | 2745 | |
e075ae69 | 2746 | #define EXTRA_CC_MODES \ |
9076b9c1 JH |
2747 | CC(CCGCmode, "CCGC") \ |
2748 | CC(CCGOCmode, "CCGOC") \ | |
e075ae69 | 2749 | CC(CCNOmode, "CCNO") \ |
16189740 | 2750 | CC(CCZmode, "CCZ") \ |
e075ae69 RH |
2751 | CC(CCFPmode, "CCFP") \ |
2752 | CC(CCFPUmode, "CCFPU") | |
c572e5ba JVA |
2753 | |
2754 | /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, | |
2755 | return the mode to be used for the comparison. | |
2756 | ||
2757 | For floating-point equality comparisons, CCFPEQmode should be used. | |
e075ae69 | 2758 | VOIDmode should be used in all other cases. |
c572e5ba | 2759 | |
16189740 | 2760 | For integer comparisons against zero, reduce to CCNOmode or CCZmode if |
e075ae69 | 2761 | possible, to allow for more combinations. */ |
c98f8742 | 2762 | |
9076b9c1 | 2763 | #define SELECT_CC_MODE(OP,X,Y) ix86_cc_mode (OP, X, Y) |
9e7adcb3 JH |
2764 | |
2765 | /* Return non-zero if MODE implies a floating point inequality can be | |
2766 | reversed. */ | |
2767 | ||
2768 | #define REVERSIBLE_CC_MODE(MODE) 1 | |
2769 | ||
2770 | /* A C expression whose value is reversed condition code of the CODE for | |
2771 | comparison done in CC_MODE mode. */ | |
2772 | #define REVERSE_CONDITION(CODE, MODE) \ | |
2773 | ((MODE) != CCFPmode && (MODE) != CCFPUmode ? reverse_condition (CODE) \ | |
2774 | : reverse_condition_maybe_unordered (CODE)) | |
2775 | ||
c98f8742 JVA |
2776 | \f |
2777 | /* Control the assembler format that we output, to the extent | |
2778 | this does not vary between assemblers. */ | |
2779 | ||
2780 | /* How to refer to registers in assembler output. | |
2781 | This sequence is indexed by compiler's hard-register-number (see above). */ | |
2782 | ||
2783 | /* In order to refer to the first 8 regs as 32 bit regs prefix an "e" | |
2784 | For non floating point regs, the following are the HImode names. | |
2785 | ||
2786 | For float regs, the stack top is sometimes referred to as "%st(0)" | |
9e06e321 | 2787 | instead of just "%st". PRINT_REG handles this with the "y" code. */ |
c98f8742 | 2788 | |
a7180f70 BS |
2789 | #undef HI_REGISTER_NAMES |
2790 | #define HI_REGISTER_NAMES \ | |
2791 | {"ax","dx","cx","bx","si","di","bp","sp", \ | |
2792 | "st","st(1)","st(2)","st(3)","st(4)","st(5)","st(6)","st(7)","", \ | |
2793 | "flags","fpsr", "dirflag", "frame", \ | |
2794 | "xmm0","xmm1","xmm2","xmm3","xmm4","xmm5","xmm6","xmm7", \ | |
3f3f2124 JH |
2795 | "mm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7" , \ |
2796 | "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ | |
2797 | "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"} | |
a7180f70 | 2798 | |
c98f8742 JVA |
2799 | #define REGISTER_NAMES HI_REGISTER_NAMES |
2800 | ||
2801 | /* Table of additional register names to use in user input. */ | |
2802 | ||
2803 | #define ADDITIONAL_REGISTER_NAMES \ | |
54d26233 MH |
2804 | { { "eax", 0 }, { "edx", 1 }, { "ecx", 2 }, { "ebx", 3 }, \ |
2805 | { "esi", 4 }, { "edi", 5 }, { "ebp", 6 }, { "esp", 7 }, \ | |
3f3f2124 JH |
2806 | { "rax", 0 }, { "rdx", 1 }, { "rcx", 2 }, { "rbx", 3 }, \ |
2807 | { "rsi", 4 }, { "rdi", 5 }, { "rbp", 6 }, { "rsp", 7 }, \ | |
54d26233 | 2808 | { "al", 0 }, { "dl", 1 }, { "cl", 2 }, { "bl", 3 }, \ |
a7180f70 BS |
2809 | { "ah", 0 }, { "dh", 1 }, { "ch", 2 }, { "bh", 3 }, \ |
2810 | { "mm0", 8}, { "mm1", 9}, { "mm2", 10}, { "mm3", 11}, \ | |
2811 | { "mm4", 12}, { "mm5", 13}, { "mm6", 14}, { "mm7", 15} } | |
c98f8742 JVA |
2812 | |
2813 | /* Note we are omitting these since currently I don't know how | |
2814 | to get gcc to use these, since they want the same but different | |
2815 | number as al, and ax. | |
2816 | */ | |
2817 | ||
c98f8742 | 2818 | #define QI_REGISTER_NAMES \ |
3f3f2124 | 2819 | {"al", "dl", "cl", "bl", "sil", "dil", "bpl", "spl",} |
c98f8742 JVA |
2820 | |
2821 | /* These parallel the array above, and can be used to access bits 8:15 | |
2822 | of regs 0 through 3. */ | |
2823 | ||
2824 | #define QI_HIGH_REGISTER_NAMES \ | |
2825 | {"ah", "dh", "ch", "bh", } | |
2826 | ||
2827 | /* How to renumber registers for dbx and gdb. */ | |
2828 | ||
0f7fa3d0 JH |
2829 | #define DBX_REGISTER_NUMBER(n) \ |
2830 | (TARGET_64BIT ? dbx64_register_map[n] : dbx_register_map[n]) | |
83774849 RH |
2831 | |
2832 | extern int const dbx_register_map[FIRST_PSEUDO_REGISTER]; | |
0f7fa3d0 | 2833 | extern int const dbx64_register_map[FIRST_PSEUDO_REGISTER]; |
83774849 | 2834 | extern int const svr4_dbx_register_map[FIRST_PSEUDO_REGISTER]; |
c98f8742 | 2835 | |
469ac993 JM |
2836 | /* Before the prologue, RA is at 0(%esp). */ |
2837 | #define INCOMING_RETURN_ADDR_RTX \ | |
f64cecad | 2838 | gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM)) |
c5c76735 | 2839 | |
e414ab29 | 2840 | /* After the prologue, RA is at -4(AP) in the current frame. */ |
1020a5ab RH |
2841 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ |
2842 | ((COUNT) == 0 \ | |
2843 | ? gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, -UNITS_PER_WORD)) \ | |
2844 | : gen_rtx_MEM (Pmode, plus_constant (FRAME, UNITS_PER_WORD))) | |
e414ab29 | 2845 | |
469ac993 | 2846 | /* PC is dbx register 8; let's use that column for RA. */ |
0f7fa3d0 | 2847 | #define DWARF_FRAME_RETURN_COLUMN (TARGET_64BIT ? 16 : 8) |
469ac993 | 2848 | |
a6ab3aad | 2849 | /* Before the prologue, the top of the frame is at 4(%esp). */ |
0f7fa3d0 | 2850 | #define INCOMING_FRAME_SP_OFFSET UNITS_PER_WORD |
a6ab3aad | 2851 | |
1020a5ab RH |
2852 | /* Describe how we implement __builtin_eh_return. */ |
2853 | #define EH_RETURN_DATA_REGNO(N) ((N) < 2 ? (N) : INVALID_REGNUM) | |
2854 | #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, 2) | |
2855 | ||
ad919812 | 2856 | |
e4c4ebeb RH |
2857 | /* Select a format to encode pointers in exception handling data. CODE |
2858 | is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is | |
2859 | true if the symbol may be affected by dynamic relocations. | |
2860 | ||
2861 | ??? All x86 object file formats are capable of representing this. | |
2862 | After all, the relocation needed is the same as for the call insn. | |
2863 | Whether or not a particular assembler allows us to enter such, I | |
2864 | guess we'll have to see. */ | |
2865 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ | |
2866 | (flag_pic ? (GLOBAL ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel \ | |
2867 | : DW_EH_PE_absptr) | |
2868 | ||
c98f8742 JVA |
2869 | /* This is how to output the definition of a user-level label named NAME, |
2870 | such as the label on a static function or variable NAME. */ | |
2871 | ||
2872 | #define ASM_OUTPUT_LABEL(FILE,NAME) \ | |
2873 | (assemble_name (FILE, NAME), fputs (":\n", FILE)) | |
2874 | ||
2875 | /* This is how to output an assembler line defining a `double' constant. */ | |
2876 | ||
0038aea6 JVA |
2877 | #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \ |
2878 | do { long l[2]; \ | |
2879 | REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l); \ | |
79b79064 | 2880 | fprintf (FILE, "%s0x%lx,0x%lx\n", ASM_LONG, l[0], l[1]); \ |
0038aea6 | 2881 | } while (0) |
c98f8742 | 2882 | |
0038aea6 JVA |
2883 | /* This is how to output a `long double' extended real constant. */ |
2884 | ||
2885 | #undef ASM_OUTPUT_LONG_DOUBLE | |
2886 | #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE) \ | |
2b589241 | 2887 | do { long l[4]; \ |
0038aea6 | 2888 | REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l); \ |
2b589241 | 2889 | if (TARGET_128BIT_LONG_DOUBLE) \ |
79b79064 | 2890 | fprintf (FILE, "%s0x%lx,0x%lx,0x%lx,0x0\n", ASM_LONG, l[0], l[1], l[2]); \ |
2b589241 | 2891 | else \ |
79b79064 | 2892 | fprintf (FILE, "%s0x%lx,0x%lx,0x%lx\n", ASM_LONG, l[0], l[1], l[2]); \ |
0038aea6 | 2893 | } while (0) |
c98f8742 JVA |
2894 | |
2895 | /* This is how to output an assembler line defining a `float' constant. */ | |
2896 | ||
0038aea6 JVA |
2897 | #define ASM_OUTPUT_FLOAT(FILE,VALUE) \ |
2898 | do { long l; \ | |
2899 | REAL_VALUE_TO_TARGET_SINGLE (VALUE, l); \ | |
79b79064 | 2900 | fprintf ((FILE), "%s0x%lx\n", ASM_LONG, l); \ |
c98f8742 JVA |
2901 | } while (0) |
2902 | ||
c98f8742 JVA |
2903 | /* Store in OUTPUT a string (made with alloca) containing |
2904 | an assembler-name for a local static variable named NAME. | |
2905 | LABELNO is an integer which is different for each call. */ | |
2906 | ||
2907 | #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ | |
2908 | ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ | |
2909 | sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO))) | |
2910 | ||
c98f8742 JVA |
2911 | /* This is how to output an assembler line defining an `int' constant. */ |
2912 | ||
2913 | #define ASM_OUTPUT_INT(FILE,VALUE) \ | |
79b79064 | 2914 | ( fputs (ASM_LONG, FILE), \ |
c98f8742 JVA |
2915 | output_addr_const (FILE,(VALUE)), \ |
2916 | putc('\n',FILE)) | |
2917 | ||
14f73b5a JH |
2918 | #define ASM_OUTPUT_DOUBLE_INT(FILE,VALUE) \ |
2919 | ( fprintf (FILE, "%s\t", ASM_QUAD), \ | |
2920 | output_addr_const (FILE,(VALUE)), \ | |
2921 | putc('\n',FILE)) | |
2922 | ||
c98f8742 | 2923 | /* Likewise for `char' and `short' constants. */ |
c98f8742 JVA |
2924 | |
2925 | #define ASM_OUTPUT_SHORT(FILE,VALUE) \ | |
79b79064 | 2926 | ( fputs (ASM_SHORT, FILE), \ |
c98f8742 JVA |
2927 | output_addr_const (FILE,(VALUE)), \ |
2928 | putc('\n',FILE)) | |
2929 | ||
c98f8742 | 2930 | #define ASM_OUTPUT_CHAR(FILE,VALUE) \ |
79b79064 | 2931 | ( fputs (ASM_BYTE_OP, FILE), \ |
c98f8742 JVA |
2932 | output_addr_const (FILE, (VALUE)), \ |
2933 | putc ('\n', FILE)) | |
2934 | ||
79b79064 RH |
2935 | /* Given that x86 natively supports unaligned data, it's reasonable to |
2936 | assume that all x86 assemblers don't auto-align data. Thus the | |
2937 | unaligned output macros required by dwarf2 frame unwind information | |
2938 | degenerate to the macros used above. */ | |
2939 | #define UNALIGNED_SHORT_ASM_OP ASM_SHORT | |
2940 | #define UNALIGNED_INT_ASM_OP ASM_LONG | |
2941 | #define INT_ASM_OP ASM_LONG | |
2942 | ||
c98f8742 JVA |
2943 | /* This is how to output an assembler line for a numeric constant byte. */ |
2944 | ||
2945 | #define ASM_OUTPUT_BYTE(FILE,VALUE) \ | |
f0ca81d2 | 2946 | asm_fprintf ((FILE), "%s0x%x\n", ASM_BYTE_OP, (VALUE)) |
c98f8742 JVA |
2947 | |
2948 | /* This is how to output an insn to push a register on the stack. | |
2949 | It need not be very fast code. */ | |
2950 | ||
2951 | #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ | |
e075ae69 | 2952 | asm_fprintf (FILE, "\tpush{l}\t%%e%s\n", reg_names[REGNO]) |
c98f8742 JVA |
2953 | |
2954 | /* This is how to output an insn to pop a register from the stack. | |
2955 | It need not be very fast code. */ | |
2956 | ||
2957 | #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ | |
e075ae69 | 2958 | asm_fprintf (FILE, "\tpop{l}\t%%e%s\n", reg_names[REGNO]) |
c98f8742 JVA |
2959 | |
2960 | /* This is how to output an element of a case-vector that is absolute. | |
2961 | */ | |
2962 | ||
2963 | #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
79b79064 | 2964 | fprintf (FILE, "%s%s%d\n", ASM_LONG, LPREFIX, VALUE) |
c98f8742 JVA |
2965 | |
2966 | /* This is how to output an element of a case-vector that is relative. | |
2967 | We don't use these on the 386 yet, because the ATT assembler can't do | |
2968 | forward reference the differences. | |
2969 | */ | |
2970 | ||
33f7f353 | 2971 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ |
79b79064 | 2972 | fprintf (FILE, "%s%s%d-%s%d\n",ASM_LONG, LPREFIX, VALUE, LPREFIX, REL) |
c98f8742 | 2973 | |
1865dbb5 JM |
2974 | /* A C statement that outputs an address constant appropriate to |
2975 | for DWARF debugging. */ | |
2976 | ||
2977 | #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,X) \ | |
2978 | i386_dwarf_output_addr_const((FILE),(X)) | |
2979 | ||
2980 | /* Either simplify a location expression, or return the original. */ | |
2981 | ||
2982 | #define ASM_SIMPLIFY_DWARF_ADDR(X) \ | |
2983 | i386_simplify_dwarf_addr(X) | |
74b42c8b | 2984 | \f |
c98f8742 JVA |
2985 | /* Print operand X (an rtx) in assembler syntax to file FILE. |
2986 | CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. | |
ef6257cd JH |
2987 | Effect of various CODE letters is described in i386.c near |
2988 | print_operand function. */ | |
c98f8742 JVA |
2989 | |
2990 | #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ | |
ef6257cd | 2991 | ((CODE) == '*' || (CODE) == '+') |
c98f8742 | 2992 | |
74b42c8b RS |
2993 | /* Print the name of a register based on its machine mode and number. |
2994 | If CODE is 'w', pretend the mode is HImode. | |
2995 | If CODE is 'b', pretend the mode is QImode. | |
2996 | If CODE is 'k', pretend the mode is SImode. | |
ef6257cd | 2997 | If CODE is 'q', pretend the mode is DImode. |
74b42c8b | 2998 | If CODE is 'h', pretend the reg is the `high' byte register. |
ef6257cd | 2999 | If CODE is 'y', print "st(0)" instead of "st", if the reg is stack op. */ |
74b42c8b | 3000 | |
e075ae69 RH |
3001 | #define PRINT_REG(X, CODE, FILE) \ |
3002 | print_reg (X, CODE, FILE) | |
74b42c8b | 3003 | |
c98f8742 JVA |
3004 | #define PRINT_OPERAND(FILE, X, CODE) \ |
3005 | print_operand (FILE, X, CODE) | |
c98f8742 JVA |
3006 | |
3007 | #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
3008 | print_operand_address (FILE, ADDR) | |
3009 | ||
aa3e8d2a JVA |
3010 | /* Print the name of a register for based on its machine mode and number. |
3011 | This macro is used to print debugging output. | |
3012 | This macro is different from PRINT_REG in that it may be used in | |
3013 | programs that are not linked with aux-output.o. */ | |
3014 | ||
e075ae69 | 3015 | #define DEBUG_PRINT_REG(X, CODE, FILE) \ |
69ddee61 KG |
3016 | do { static const char * const hi_name[] = HI_REGISTER_NAMES; \ |
3017 | static const char * const qi_name[] = QI_REGISTER_NAMES; \ | |
e075ae69 RH |
3018 | fprintf (FILE, "%d ", REGNO (X)); \ |
3019 | if (REGNO (X) == FLAGS_REG) \ | |
3020 | { fputs ("flags", FILE); break; } \ | |
7c7ef435 JH |
3021 | if (REGNO (X) == DIRFLAG_REG) \ |
3022 | { fputs ("dirflag", FILE); break; } \ | |
e075ae69 RH |
3023 | if (REGNO (X) == FPSR_REG) \ |
3024 | { fputs ("fpsr", FILE); break; } \ | |
aa3e8d2a JVA |
3025 | if (REGNO (X) == ARG_POINTER_REGNUM) \ |
3026 | { fputs ("argp", FILE); break; } \ | |
564d80f4 JH |
3027 | if (REGNO (X) == FRAME_POINTER_REGNUM) \ |
3028 | { fputs ("frame", FILE); break; } \ | |
aa3e8d2a JVA |
3029 | if (STACK_TOP_P (X)) \ |
3030 | { fputs ("st(0)", FILE); break; } \ | |
b0ceea8c RK |
3031 | if (FP_REG_P (X)) \ |
3032 | { fputs (hi_name[REGNO(X)], FILE); break; } \ | |
3f3f2124 JH |
3033 | if (REX_INT_REG_P (X)) \ |
3034 | { \ | |
3035 | switch (GET_MODE_SIZE (GET_MODE (X))) \ | |
3036 | { \ | |
3037 | default: \ | |
3038 | case 8: \ | |
3039 | fprintf (FILE, "r%i", REGNO (X) \ | |
3040 | - FIRST_REX_INT_REG + 8); \ | |
3041 | break; \ | |
3042 | case 4: \ | |
3043 | fprintf (FILE, "r%id", REGNO (X) \ | |
3044 | - FIRST_REX_INT_REG + 8); \ | |
3045 | break; \ | |
3046 | case 2: \ | |
3047 | fprintf (FILE, "r%iw", REGNO (X) \ | |
3048 | - FIRST_REX_INT_REG + 8); \ | |
3049 | break; \ | |
3050 | case 1: \ | |
3051 | fprintf (FILE, "r%ib", REGNO (X) \ | |
3052 | - FIRST_REX_INT_REG + 8); \ | |
3053 | break; \ | |
3054 | } \ | |
3055 | break; \ | |
3056 | } \ | |
aa3e8d2a JVA |
3057 | switch (GET_MODE_SIZE (GET_MODE (X))) \ |
3058 | { \ | |
3f3f2124 JH |
3059 | case 8: \ |
3060 | fputs ("r", FILE); \ | |
3061 | fputs (hi_name[REGNO (X)], FILE); \ | |
3062 | break; \ | |
b0ceea8c RK |
3063 | default: \ |
3064 | fputs ("e", FILE); \ | |
aa3e8d2a JVA |
3065 | case 2: \ |
3066 | fputs (hi_name[REGNO (X)], FILE); \ | |
3067 | break; \ | |
3068 | case 1: \ | |
3069 | fputs (qi_name[REGNO (X)], FILE); \ | |
3070 | break; \ | |
3071 | } \ | |
3072 | } while (0) | |
3073 | ||
c98f8742 JVA |
3074 | /* a letter which is not needed by the normal asm syntax, which |
3075 | we can use for operand syntax in the extended asm */ | |
3076 | ||
3077 | #define ASM_OPERAND_LETTER '#' | |
c98f8742 | 3078 | #define RET return "" |
f64cecad | 3079 | #define AT_SP(mode) (gen_rtx_MEM ((mode), stack_pointer_rtx)) |
d4ba09c0 | 3080 | \f |
e075ae69 RH |
3081 | /* Define the codes that are matched by predicates in i386.c. */ |
3082 | ||
3083 | #define PREDICATE_CODES \ | |
7dd4b4a3 JH |
3084 | {"x86_64_immediate_operand", {CONST_INT, SUBREG, REG, \ |
3085 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3086 | {"x86_64_nonmemory_operand", {CONST_INT, SUBREG, REG, \ | |
3087 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3088 | {"x86_64_movabs_operand", {CONST_INT, SUBREG, REG, \ | |
3089 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3090 | {"x86_64_szext_nonmemory_operand", {CONST_INT, SUBREG, REG, \ | |
3091 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3092 | {"x86_64_general_operand", {CONST_INT, SUBREG, REG, MEM, \ | |
3093 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3094 | {"x86_64_szext_general_operand", {CONST_INT, SUBREG, REG, MEM, \ | |
3095 | SYMBOL_REF, LABEL_REF, CONST}}, \ | |
3096 | {"x86_64_zext_immediate_operand", {CONST_INT, CONST_DOUBLE, CONST, \ | |
3097 | SYMBOL_REF, LABEL_REF}}, \ | |
371bc54b | 3098 | {"shiftdi_operand", {SUBREG, REG, MEM}}, \ |
8bad7136 | 3099 | {"const_int_1_operand", {CONST_INT}}, \ |
e075ae69 | 3100 | {"symbolic_operand", {SYMBOL_REF, LABEL_REF, CONST}}, \ |
2247f6ed JH |
3101 | {"aligned_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \ |
3102 | LABEL_REF, SUBREG, REG, MEM}}, \ | |
e075ae69 | 3103 | {"pic_symbolic_operand", {CONST}}, \ |
e1ff012c | 3104 | {"call_insn_operand", {REG, SUBREG, MEM, SYMBOL_REF}}, \ |
eaf19aba | 3105 | {"constant_call_address_operand", {SYMBOL_REF, CONST}}, \ |
e075ae69 RH |
3106 | {"const0_operand", {CONST_INT, CONST_DOUBLE}}, \ |
3107 | {"const1_operand", {CONST_INT}}, \ | |
3108 | {"const248_operand", {CONST_INT}}, \ | |
3109 | {"incdec_operand", {CONST_INT}}, \ | |
915119a5 | 3110 | {"mmx_reg_operand", {REG}}, \ |
e075ae69 | 3111 | {"reg_no_sp_operand", {SUBREG, REG}}, \ |
2c5a510c RH |
3112 | {"general_no_elim_operand", {CONST_INT, CONST_DOUBLE, CONST, \ |
3113 | SYMBOL_REF, LABEL_REF, SUBREG, REG, MEM}}, \ | |
3114 | {"nonmemory_no_elim_operand", {CONST_INT, REG, SUBREG}}, \ | |
e075ae69 RH |
3115 | {"q_regs_operand", {SUBREG, REG}}, \ |
3116 | {"non_q_regs_operand", {SUBREG, REG}}, \ | |
9e7adcb3 JH |
3117 | {"fcmov_comparison_operator", {EQ, NE, LTU, GTU, LEU, GEU, UNORDERED, \ |
3118 | ORDERED, LT, UNLT, GT, UNGT, LE, UNLE, \ | |
3119 | GE, UNGE, LTGT, UNEQ}}, \ | |
bf71a4f8 JH |
3120 | {"sse_comparison_operator", {EQ, LT, LE, UNORDERED, NE, UNGE, UNGT, \ |
3121 | ORDERED, UNEQ, UNLT, UNLE, LTGT, GE, GT \ | |
3122 | }}, \ | |
9076b9c1 | 3123 | {"ix86_comparison_operator", {EQ, NE, LE, LT, GE, GT, LEU, LTU, GEU, \ |
9e7adcb3 JH |
3124 | GTU, UNORDERED, ORDERED, UNLE, UNLT, \ |
3125 | UNGE, UNGT, LTGT, UNEQ }}, \ | |
e075ae69 RH |
3126 | {"cmp_fp_expander_operand", {CONST_DOUBLE, SUBREG, REG, MEM}}, \ |
3127 | {"ext_register_operand", {SUBREG, REG}}, \ | |
3128 | {"binary_fp_operator", {PLUS, MINUS, MULT, DIV}}, \ | |
3129 | {"mult_operator", {MULT}}, \ | |
3130 | {"div_operator", {DIV}}, \ | |
3131 | {"arith_or_logical_operator", {PLUS, MULT, AND, IOR, XOR, SMIN, SMAX, \ | |
3132 | UMIN, UMAX, COMPARE, MINUS, DIV, MOD, \ | |
3133 | UDIV, UMOD, ASHIFT, ROTATE, ASHIFTRT, \ | |
3134 | LSHIFTRT, ROTATERT}}, \ | |
e9e80858 | 3135 | {"promotable_binary_operator", {PLUS, MULT, AND, IOR, XOR, ASHIFT}}, \ |
e075ae69 RH |
3136 | {"memory_displacement_operand", {MEM}}, \ |
3137 | {"cmpsi_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \ | |
6343a50e ZW |
3138 | LABEL_REF, SUBREG, REG, MEM, AND}}, \ |
3139 | {"long_memory_operand", {MEM}}, | |
c76aab11 RH |
3140 | |
3141 | /* A list of predicates that do special things with modes, and so | |
3142 | should not elicit warnings for VOIDmode match_operand. */ | |
3143 | ||
3144 | #define SPECIAL_MODE_PREDICATES \ | |
3145 | "ext_register_operand", | |
c98f8742 | 3146 | \f |
6189a572 JH |
3147 | /* CM_32 is used by 32bit ABI |
3148 | CM_SMALL is small model assuming that all code and data fits in the first | |
3149 | 31bits of address space. | |
3150 | CM_KERNEL is model assuming that all code and data fits in the negative | |
3151 | 31bits of address space. | |
3152 | CM_MEDIUM is model assuming that code fits in the first 31bits of address | |
3153 | space. Size of data is unlimited. | |
3154 | CM_LARGE is model making no assumptions about size of particular sections. | |
3155 | ||
3156 | CM_SMALL_PIC is model for PIC libraries assuming that code+data+got/plt | |
3157 | tables first in 31bits of address space. | |
3158 | */ | |
3159 | enum cmodel { | |
3160 | CM_32, | |
3161 | CM_SMALL, | |
3162 | CM_KERNEL, | |
3163 | CM_MEDIUM, | |
3164 | CM_LARGE, | |
3165 | CM_SMALL_PIC | |
3166 | }; | |
3167 | ||
8362f420 JH |
3168 | /* Size of the RED_ZONE area. */ |
3169 | #define RED_ZONE_SIZE 128 | |
3170 | /* Reserved area of the red zone for temporaries. */ | |
3171 | #define RED_ZONE_RESERVE 8 | |
6189a572 JH |
3172 | /* Valud of -mcmodel specified by user. */ |
3173 | extern const char *ix86_cmodel_string; | |
3174 | extern enum cmodel ix86_cmodel; | |
3175 | \f | |
f5316dfe | 3176 | /* Variables in i386.c */ |
9c23aa47 ZW |
3177 | extern const char *ix86_cpu_string; /* for -mcpu=<xxx> */ |
3178 | extern const char *ix86_arch_string; /* for -march=<xxx> */ | |
e075ae69 RH |
3179 | extern const char *ix86_regparm_string; /* # registers to use to pass args */ |
3180 | extern const char *ix86_align_loops_string; /* power of two alignment for loops */ | |
3181 | extern const char *ix86_align_jumps_string; /* power of two alignment for non-loop jumps */ | |
3182 | extern const char *ix86_align_funcs_string; /* power of two alignment for functions */ | |
3183 | extern const char *ix86_preferred_stack_boundary_string;/* power of two alignment for stack boundary */ | |
3184 | extern const char *ix86_branch_cost_string; /* values 1-5: see jump.c */ | |
3185 | extern int ix86_regparm; /* ix86_regparm_string as a number */ | |
e075ae69 RH |
3186 | extern int ix86_preferred_stack_boundary; /* preferred stack boundary alignment in bits */ |
3187 | extern int ix86_branch_cost; /* values 1-5: see jump.c */ | |
e075ae69 RH |
3188 | extern enum reg_class const regclass_map[]; /* smalled class containing REGNO */ |
3189 | extern struct rtx_def *ix86_compare_op0; /* operand 0 for comparisons */ | |
3190 | extern struct rtx_def *ix86_compare_op1; /* operand 1 for comparisons */ | |
22fb740d JH |
3191 | \f |
3192 | /* To properly truncate FP values into integers, we need to set i387 control | |
3193 | word. We can't emit proper mode switching code before reload, as spills | |
3194 | generated by reload may truncate values incorrectly, but we still can avoid | |
3195 | redundant computation of new control word by the mode switching pass. | |
3196 | The fldcw instructions are still emitted redundantly, but this is probably | |
3197 | not going to be noticeable problem, as most CPUs do have fast path for | |
3198 | the sequence. | |
3199 | ||
3200 | The machinery is to emit simple truncation instructions and split them | |
3201 | before reload to instructions having USEs of two memory locations that | |
3202 | are filled by this code to old and new control word. | |
3203 | ||
3204 | Post-reload pass may be later used to eliminate the redundant fildcw if | |
3205 | needed. */ | |
3206 | ||
3207 | enum fp_cw_mode {FP_CW_STORED, FP_CW_UNINITIALIZED, FP_CW_ANY}; | |
3208 | ||
3209 | /* Define this macro if the port needs extra instructions inserted | |
3210 | for mode switching in an optimizing compilation. */ | |
3211 | ||
3212 | #define OPTIMIZE_MODE_SWITCHING(ENTITY) 1 | |
3213 | ||
3214 | /* If you define `OPTIMIZE_MODE_SWITCHING', you have to define this as | |
3215 | initializer for an array of integers. Each initializer element N | |
3216 | refers to an entity that needs mode switching, and specifies the | |
3217 | number of different modes that might need to be set for this | |
3218 | entity. The position of the initializer in the initializer - | |
3219 | starting counting at zero - determines the integer that is used to | |
3220 | refer to the mode-switched entity in question. */ | |
3221 | ||
3222 | #define NUM_MODES_FOR_MODE_SWITCHING { FP_CW_ANY } | |
3223 | ||
3224 | /* ENTITY is an integer specifying a mode-switched entity. If | |
3225 | `OPTIMIZE_MODE_SWITCHING' is defined, you must define this macro to | |
3226 | return an integer value not larger than the corresponding element | |
3227 | in `NUM_MODES_FOR_MODE_SWITCHING', to denote the mode that ENTITY | |
3228 | must be switched into prior to the execution of INSN. */ | |
3229 | ||
3230 | #define MODE_NEEDED(ENTITY, I) \ | |
3231 | (GET_CODE (I) == CALL_INSN \ | |
3232 | || (GET_CODE (I) == INSN && (asm_noperands (PATTERN (I)) >= 0 \ | |
3233 | || GET_CODE (PATTERN (I)) == ASM_INPUT))\ | |
3234 | ? FP_CW_UNINITIALIZED \ | |
3235 | : recog_memoized (I) < 0 || get_attr_type (I) != TYPE_FISTP \ | |
3236 | ? FP_CW_ANY \ | |
3237 | : FP_CW_STORED) | |
3238 | ||
3239 | /* This macro specifies the order in which modes for ENTITY are | |
3240 | processed. 0 is the highest priority. */ | |
3241 | ||
3242 | #define MODE_PRIORITY_TO_MODE(ENTITY, N) N | |
3243 | ||
3244 | /* Generate one or more insns to set ENTITY to MODE. HARD_REG_LIVE | |
3245 | is the set of hard registers live at the point where the insn(s) | |
3246 | are to be inserted. */ | |
3247 | ||
3248 | #define EMIT_MODE_SET(ENTITY, MODE, HARD_REGS_LIVE) \ | |
3249 | (MODE == FP_CW_STORED \ | |
3250 | ? emit_i387_cw_initialization (assign_386_stack_local (HImode, 1), \ | |
3251 | assign_386_stack_local (HImode, 2)), 0\ | |
3252 | : 0) | |
0f0138b6 JH |
3253 | \f |
3254 | /* Avoid renaming of stack registers, as doing so in combination with | |
3255 | scheduling just increases amount of live registers at time and in | |
3256 | the turn amount of fxch instructions needed. | |
3257 | ||
3258 | ??? Maybe Pentium chips benefits from renaming, someone can try... */ | |
3259 | ||
3260 | #define HARD_REGNO_RENAME_OK(src,target) \ | |
3261 | ((src) < FIRST_STACK_REG || (src) > LAST_STACK_REG) | |
22fb740d | 3262 | |
3b3c6a3f | 3263 | \f |
c98f8742 JVA |
3264 | /* |
3265 | Local variables: | |
3266 | version-control: t | |
3267 | End: | |
3268 | */ |