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e75b25e7 | 1 | /* Definitions of target machine for GNU compiler. MIPS version. |
214be03f | 2 | Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 |
b2d36e74 | 3 | 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 |
aa3e18a0 | 4 | Free Software Foundation, Inc. |
ae3e1bb4 RK |
5 | Contributed by A. Lichnewsky (lich@inria.inria.fr). |
6 | Changed by Michael Meissner (meissner@osf.org). | |
85f65093 | 7 | 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and |
ae3e1bb4 | 8 | Brendan Eich (brendan@microunity.com). |
e75b25e7 | 9 | |
7ec022b2 | 10 | This file is part of GCC. |
e75b25e7 | 11 | |
7ec022b2 | 12 | GCC is free software; you can redistribute it and/or modify |
e75b25e7 | 13 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 14 | the Free Software Foundation; either version 3, or (at your option) |
e75b25e7 MM |
15 | any later version. |
16 | ||
7ec022b2 | 17 | GCC is distributed in the hope that it will be useful, |
e75b25e7 MM |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
21 | ||
22 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
23 | along with GCC; see the file COPYING3. If not see |
24 | <http://www.gnu.org/licenses/>. */ | |
e75b25e7 MM |
25 | |
26 | ||
8cb6400c RS |
27 | #include "config/vxworks-dummy.h" |
28 | ||
f770d743 JM |
29 | #ifdef GENERATOR_FILE |
30 | /* This is used in some insn conditions, so needs to be declared, but | |
31 | does not need to be defined. */ | |
32 | extern int target_flags_explicit; | |
33 | #endif | |
34 | ||
e75b25e7 MM |
35 | /* MIPS external variables defined in mips.c. */ |
36 | ||
ac8ab9fe RS |
37 | /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32), |
38 | ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended | |
85f65093 | 39 | to work on a 64-bit machine. */ |
b2d8cf33 | 40 | |
04bd620d JW |
41 | #define ABI_32 0 |
42 | #define ABI_N32 1 | |
43 | #define ABI_64 2 | |
44 | #define ABI_EABI 3 | |
a53f72db | 45 | #define ABI_O64 4 |
0e5a4ad8 | 46 | |
0da4c1ea RS |
47 | /* Masks that affect tuning. |
48 | ||
49 | PTF_AVOID_BRANCHLIKELY | |
50 | Set if it is usually not profitable to use branch-likely instructions | |
51 | for this target, typically because the branches are always predicted | |
52 | taken and so incur a large overhead when not taken. */ | |
53 | #define PTF_AVOID_BRANCHLIKELY 0x1 | |
54 | ||
05713b80 | 55 | /* Information about one recognized processor. Defined here for the |
a27fb29b RS |
56 | benefit of TARGET_CPU_CPP_BUILTINS. */ |
57 | struct mips_cpu_info { | |
58 | /* The 'canonical' name of the processor as far as GCC is concerned. | |
59 | It's typically a manufacturer's prefix followed by a numerical | |
85f65093 | 60 | designation. It should be lowercase. */ |
a27fb29b RS |
61 | const char *name; |
62 | ||
63 | /* The internal processor number that most closely matches this | |
64 | entry. Several processors can have the same value, if there's no | |
65 | difference between them from GCC's point of view. */ | |
24609606 | 66 | enum processor cpu; |
a27fb29b RS |
67 | |
68 | /* The ISA level that the processor implements. */ | |
69 | int isa; | |
0da4c1ea RS |
70 | |
71 | /* A mask of PTF_* values. */ | |
72 | unsigned int tune_flags; | |
a27fb29b RS |
73 | }; |
74 | ||
c93c5160 RS |
75 | /* Enumerates the setting of the -mcode-readable option. */ |
76 | enum mips_code_readable_setting { | |
77 | CODE_READABLE_NO, | |
78 | CODE_READABLE_PCREL, | |
79 | CODE_READABLE_YES | |
80 | }; | |
81 | ||
3a6ee9f4 MM |
82 | /* Macros to silence warnings about numbers being signed in traditional |
83 | C and unsigned in ISO C when compiled on 32-bit hosts. */ | |
84 | ||
85 | #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */ | |
86 | #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */ | |
87 | #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */ | |
88 | ||
149e4e00 MM |
89 | \f |
90 | /* Run-time compilation parameters selecting different hardware subsets. */ | |
91 | ||
8cb6400c RS |
92 | /* True if we are generating position-independent VxWorks RTP code. */ |
93 | #define TARGET_RTP_PIC (TARGET_VXWORKS_RTP && flag_pic) | |
94 | ||
e21d5757 DJ |
95 | /* True if the output file is marked as ".abicalls; .option pic0" |
96 | (-call_nonpic). */ | |
97 | #define TARGET_ABICALLS_PIC0 \ | |
98 | (TARGET_ABSOLUTE_ABICALLS && TARGET_PLT) | |
99 | ||
100 | /* True if the output file is marked as ".abicalls; .option pic2" (-KPIC). */ | |
101 | #define TARGET_ABICALLS_PIC2 \ | |
102 | (TARGET_ABICALLS && !TARGET_ABICALLS_PIC0) | |
103 | ||
cafe096b | 104 | /* True if the call patterns should be split into a jalr followed by |
14976818 | 105 | an instruction to restore $gp. It is only safe to split the load |
0c433c31 RS |
106 | from the call when every use of $gp is explicit. |
107 | ||
108 | See mips_must_initialize_gp_p for details about how we manage the | |
109 | global pointer. */ | |
cafe096b EC |
110 | |
111 | #define TARGET_SPLIT_CALLS \ | |
0c433c31 | 112 | (TARGET_EXPLICIT_RELOCS && TARGET_CALL_CLOBBERED_GP && epilogue_completed) |
cafe096b | 113 | |
d9870b7e RS |
114 | /* True if we're generating a form of -mabicalls in which we can use |
115 | operators like %hi and %lo to refer to locally-binding symbols. | |
116 | We can only do this for -mno-shared, and only then if we can use | |
117 | relocation operations instead of assembly macros. It isn't really | |
118 | worth using absolute sequences for 64-bit symbols because GOT | |
119 | accesses are so much shorter. */ | |
120 | ||
121 | #define TARGET_ABSOLUTE_ABICALLS \ | |
122 | (TARGET_ABICALLS \ | |
123 | && !TARGET_SHARED \ | |
124 | && TARGET_EXPLICIT_RELOCS \ | |
125 | && !ABI_HAS_64BIT_SYMBOLS) | |
126 | ||
cafe096b EC |
127 | /* True if we can optimize sibling calls. For simplicity, we only |
128 | handle cases in which call_insn_operand will reject invalid | |
129 | sibcall addresses. There are two cases in which this isn't true: | |
130 | ||
131 | - TARGET_MIPS16. call_insn_operand accepts constant addresses | |
132 | but there is no direct jump instruction. It isn't worth | |
133 | using sibling calls in this case anyway; they would usually | |
134 | be longer than normal calls. | |
135 | ||
14976818 RS |
136 | - TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS. call_insn_operand |
137 | accepts global constants, but all sibcalls must be indirect. */ | |
cafe096b | 138 | #define TARGET_SIBCALLS \ |
14976818 RS |
139 | (!TARGET_MIPS16 && (!TARGET_USE_GOT || TARGET_EXPLICIT_RELOCS)) |
140 | ||
141 | /* True if we need to use a global offset table to access some symbols. */ | |
8cb6400c | 142 | #define TARGET_USE_GOT (TARGET_ABICALLS || TARGET_RTP_PIC) |
14976818 RS |
143 | |
144 | /* True if TARGET_USE_GOT and if $gp is a call-clobbered register. */ | |
145 | #define TARGET_CALL_CLOBBERED_GP (TARGET_ABICALLS && TARGET_OLDABI) | |
146 | ||
147 | /* True if TARGET_USE_GOT and if $gp is a call-saved register. */ | |
148 | #define TARGET_CALL_SAVED_GP (TARGET_USE_GOT && !TARGET_CALL_CLOBBERED_GP) | |
149 | ||
0c433c31 RS |
150 | /* True if we should use .cprestore to store to the cprestore slot. |
151 | ||
152 | We continue to use .cprestore for explicit-reloc code so that JALs | |
153 | inside inline asms will work correctly. */ | |
154 | #define TARGET_CPRESTORE_DIRECTIVE \ | |
155 | (TARGET_ABICALLS_PIC2 && !TARGET_MIPS16) | |
156 | ||
157 | /* True if we can use the J and JAL instructions. */ | |
158 | #define TARGET_ABSOLUTE_JUMPS \ | |
159 | (!flag_pic || TARGET_ABSOLUTE_ABICALLS) | |
160 | ||
8cb6400c RS |
161 | /* True if indirect calls must use register class PIC_FN_ADDR_REG. |
162 | This is true for both the PIC and non-PIC VxWorks RTP modes. */ | |
163 | #define TARGET_USE_PIC_FN_ADDR_REG (TARGET_ABICALLS || TARGET_VXWORKS_RTP) | |
cafe096b EC |
164 | |
165 | /* True if .gpword or .gpdword should be used for switch tables. | |
117c5858 | 166 | |
5811cb27 RS |
167 | Although GAS does understand .gpdword, the SGI linker mishandles |
168 | the relocations GAS generates (R_MIPS_GPREL32 followed by R_MIPS_64). | |
169 | We therefore disable GP-relative switch tables for n64 on IRIX targets. */ | |
e21d5757 DJ |
170 | #define TARGET_GPWORD \ |
171 | (TARGET_ABICALLS \ | |
172 | && !TARGET_ABSOLUTE_ABICALLS \ | |
9aaa1ee8 | 173 | && !(mips_abi == ABI_64 && TARGET_IRIX6)) |
cafe096b | 174 | |
49576e25 RS |
175 | /* True if the output must have a writable .eh_frame. |
176 | See ASM_PREFERRED_EH_DATA_FORMAT for details. */ | |
177 | #ifdef HAVE_LD_PERSONALITY_RELAXATION | |
178 | #define TARGET_WRITABLE_EH_FRAME 0 | |
179 | #else | |
180 | #define TARGET_WRITABLE_EH_FRAME (flag_pic && TARGET_SHARED) | |
181 | #endif | |
182 | ||
293b77b0 CF |
183 | /* Test the assembler to set ISA_HAS_DSP_MULT to DSP Rev 1 or 2. */ |
184 | #ifdef HAVE_AS_DSPR1_MULT | |
185 | #define ISA_HAS_DSP_MULT ISA_HAS_DSP | |
186 | #else | |
187 | #define ISA_HAS_DSP_MULT ISA_HAS_DSPR2 | |
188 | #endif | |
189 | ||
7cc63a88 | 190 | /* Generate mips16 code */ |
40a350c9 | 191 | #define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0) |
f2d6ca50 | 192 | /* Generate mips16e code. Default 16bit ASE for mips32* and mips64* */ |
7cc63a88 | 193 | #define GENERATE_MIPS16E (TARGET_MIPS16 && mips_isa >= 32) |
e1260576 RS |
194 | /* Generate mips16e register save/restore sequences. */ |
195 | #define GENERATE_MIPS16E_SAVE_RESTORE (GENERATE_MIPS16E && mips_abi == ABI_32) | |
2bcb2ab3 | 196 | |
c93c5160 RS |
197 | /* True if we're generating a form of MIPS16 code in which general |
198 | text loads are allowed. */ | |
199 | #define TARGET_MIPS16_TEXT_LOADS \ | |
200 | (TARGET_MIPS16 && mips_code_readable == CODE_READABLE_YES) | |
201 | ||
202 | /* True if we're generating a form of MIPS16 code in which PC-relative | |
203 | loads are allowed. */ | |
204 | #define TARGET_MIPS16_PCREL_LOADS \ | |
205 | (TARGET_MIPS16 && mips_code_readable >= CODE_READABLE_PCREL) | |
206 | ||
ce3649d2 EC |
207 | /* Generic ISA defines. */ |
208 | #define ISA_MIPS1 (mips_isa == 1) | |
209 | #define ISA_MIPS2 (mips_isa == 2) | |
210 | #define ISA_MIPS3 (mips_isa == 3) | |
211 | #define ISA_MIPS4 (mips_isa == 4) | |
212 | #define ISA_MIPS32 (mips_isa == 32) | |
2d2a50c3 | 213 | #define ISA_MIPS32R2 (mips_isa == 33) |
ce3649d2 | 214 | #define ISA_MIPS64 (mips_isa == 64) |
f2d6ca50 | 215 | #define ISA_MIPS64R2 (mips_isa == 65) |
ce3649d2 | 216 | |
7dac2f89 | 217 | /* Architecture target defines. */ |
f2d6ca50 AN |
218 | #define TARGET_LOONGSON_2E (mips_arch == PROCESSOR_LOONGSON_2E) |
219 | #define TARGET_LOONGSON_2F (mips_arch == PROCESSOR_LOONGSON_2F) | |
220 | #define TARGET_LOONGSON_2EF (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F) | |
98824c6f | 221 | #define TARGET_LOONGSON_3A (mips_arch == PROCESSOR_LOONGSON_3A) |
7dac2f89 EC |
222 | #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900) |
223 | #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000) | |
3f7967e3 | 224 | #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120) |
cf768d70 | 225 | #define TARGET_MIPS4130 (mips_arch == PROCESSOR_R4130) |
5ce6f47b EC |
226 | #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400) |
227 | #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500) | |
5fe25f47 | 228 | #define TARGET_MIPS7000 (mips_arch == PROCESSOR_R7000) |
98450f0d | 229 | #define TARGET_MIPS9000 (mips_arch == PROCESSOR_R9000) |
d97e6aca | 230 | #define TARGET_OCTEON (mips_arch == PROCESSOR_OCTEON) |
c81d6e2a JW |
231 | #define TARGET_SB1 (mips_arch == PROCESSOR_SB1 \ |
232 | || mips_arch == PROCESSOR_SB1A) | |
5ce6f47b | 233 | #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000) |
7dac2f89 EC |
234 | |
235 | /* Scheduling target defines. */ | |
f2d6ca50 AN |
236 | #define TUNE_20KC (mips_tune == PROCESSOR_20KC) |
237 | #define TUNE_24K (mips_tune == PROCESSOR_24KC \ | |
238 | || mips_tune == PROCESSOR_24KF2_1 \ | |
239 | || mips_tune == PROCESSOR_24KF1_1) | |
240 | #define TUNE_74K (mips_tune == PROCESSOR_74KC \ | |
241 | || mips_tune == PROCESSOR_74KF2_1 \ | |
242 | || mips_tune == PROCESSOR_74KF1_1 \ | |
243 | || mips_tune == PROCESSOR_74KF3_2) | |
244 | #define TUNE_LOONGSON_2EF (mips_tune == PROCESSOR_LOONGSON_2E \ | |
245 | || mips_tune == PROCESSOR_LOONGSON_2F) | |
98824c6f | 246 | #define TUNE_LOONGSON_3A (mips_tune == PROCESSOR_LOONGSON_3A) |
7a38df19 EC |
247 | #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000) |
248 | #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900) | |
249 | #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000) | |
dc884a86 RS |
250 | #define TUNE_MIPS4120 (mips_tune == PROCESSOR_R4120) |
251 | #define TUNE_MIPS4130 (mips_tune == PROCESSOR_R4130) | |
7a38df19 | 252 | #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000) |
5ce6f47b EC |
253 | #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400) |
254 | #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500) | |
7a38df19 | 255 | #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000) |
5fe25f47 | 256 | #define TUNE_MIPS7000 (mips_tune == PROCESSOR_R7000) |
98450f0d | 257 | #define TUNE_MIPS9000 (mips_tune == PROCESSOR_R9000) |
ce00be9e | 258 | #define TUNE_OCTEON (mips_tune == PROCESSOR_OCTEON) |
c81d6e2a JW |
259 | #define TUNE_SB1 (mips_tune == PROCESSOR_SB1 \ |
260 | || mips_tune == PROCESSOR_SB1A) | |
7dac2f89 | 261 | |
93581857 MS |
262 | /* Whether vector modes and intrinsics for ST Microelectronics |
263 | Loongson-2E/2F processors should be enabled. In o32 pairs of | |
264 | floating-point registers provide 64-bit values. */ | |
265 | #define TARGET_LOONGSON_VECTORS (TARGET_HARD_FLOAT_ABI \ | |
98824c6f MS |
266 | && (TARGET_LOONGSON_2EF \ |
267 | || TARGET_LOONGSON_3A)) | |
93581857 | 268 | |
39ba1719 RS |
269 | /* True if the pre-reload scheduler should try to create chains of |
270 | multiply-add or multiply-subtract instructions. For example, | |
271 | suppose we have: | |
272 | ||
273 | t1 = a * b | |
274 | t2 = t1 + c * d | |
d0cb84e9 RS |
275 | t3 = e * f |
276 | t4 = t3 - g * h | |
39ba1719 | 277 | |
d0cb84e9 | 278 | t1 will have a higher priority than t2 and t3 will have a higher |
39ba1719 RS |
279 | priority than t4. However, before reload, there is no dependence |
280 | between t1 and t3, and they can often have similar priorities. | |
281 | The scheduler will then tend to prefer: | |
282 | ||
283 | t1 = a * b | |
284 | t3 = e * f | |
285 | t2 = t1 + c * d | |
286 | t4 = t3 - g * h | |
287 | ||
288 | which stops us from making full use of macc/madd-style instructions. | |
289 | This sort of situation occurs frequently in Fourier transforms and | |
290 | in unrolled loops. | |
291 | ||
292 | To counter this, the TUNE_MACC_CHAINS code will reorder the ready | |
293 | queue so that chained multiply-add and multiply-subtract instructions | |
294 | appear ahead of any other instruction that is likely to clobber lo. | |
295 | In the example above, if t2 and t3 become ready at the same time, | |
296 | the code ensures that t2 is scheduled first. | |
297 | ||
298 | Multiply-accumulate instructions are a bigger win for some targets | |
299 | than others, so this macro is defined on an opt-in basis. */ | |
dc884a86 RS |
300 | #define TUNE_MACC_CHAINS (TUNE_MIPS5500 \ |
301 | || TUNE_MIPS4120 \ | |
d56b9f12 SL |
302 | || TUNE_MIPS4130 \ |
303 | || TUNE_24K) | |
39ba1719 | 304 | |
7f9be256 | 305 | #define TARGET_OLDABI (mips_abi == ABI_32 || mips_abi == ABI_O64) |
cafe096b EC |
306 | #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64) |
307 | ||
cc4ebe7d SL |
308 | /* TARGET_HARD_FLOAT and TARGET_SOFT_FLOAT reflect whether the FPU is |
309 | directly accessible, while the command-line options select | |
310 | TARGET_HARD_FLOAT_ABI and TARGET_SOFT_FLOAT_ABI to reflect the ABI | |
311 | in use. */ | |
312 | #define TARGET_HARD_FLOAT (TARGET_HARD_FLOAT_ABI && !TARGET_MIPS16) | |
313 | #define TARGET_SOFT_FLOAT (TARGET_SOFT_FLOAT_ABI || TARGET_MIPS16) | |
068ca03a DD |
314 | |
315 | /* False if SC acts as a memory barrier with respect to itself, | |
316 | otherwise a SYNC will be emitted after SC for atomic operations | |
317 | that require ordering between the SC and following loads and | |
318 | stores. It does not tell anything about ordering of loads and | |
319 | stores prior to and following the SC, only about the SC itself and | |
320 | those loads and stores follow it. */ | |
321 | #define TARGET_SYNC_AFTER_SC (!TARGET_OCTEON) | |
322 | ||
3c7404d3 | 323 | /* IRIX specific stuff. */ |
82563d35 | 324 | #define TARGET_IRIX6 0 |
3c7404d3 | 325 | |
a27fb29b RS |
326 | /* Define preprocessor macros for the -march and -mtune options. |
327 | PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected | |
328 | processor. If INFO's canonical name is "foo", define PREFIX to | |
329 | be "foo", and define an additional macro PREFIX_FOO. */ | |
330 | #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \ | |
331 | do \ | |
332 | { \ | |
333 | char *macro, *p; \ | |
334 | \ | |
335 | macro = concat ((PREFIX), "_", (INFO)->name, NULL); \ | |
336 | for (p = macro; *p != 0; p++) \ | |
337 | *p = TOUPPER (*p); \ | |
338 | \ | |
339 | builtin_define (macro); \ | |
340 | builtin_define_with_value ((PREFIX), (INFO)->name, 1); \ | |
341 | free (macro); \ | |
342 | } \ | |
343 | while (0) | |
344 | ||
ce3649d2 | 345 | /* Target CPU builtins. */ |
0ea339ea NS |
346 | #define TARGET_CPU_CPP_BUILTINS() \ |
347 | do \ | |
348 | { \ | |
349 | /* Everyone but IRIX defines this to mips. */ \ | |
9aaa1ee8 | 350 | if (!TARGET_IRIX6) \ |
0ea339ea NS |
351 | builtin_assert ("machine=mips"); \ |
352 | \ | |
353 | builtin_assert ("cpu=mips"); \ | |
354 | builtin_define ("__mips__"); \ | |
355 | builtin_define ("_mips"); \ | |
356 | \ | |
a7f051fe RS |
357 | /* We do this here because __mips is defined below and so we \ |
358 | can't use builtin_define_std. We don't ever want to define \ | |
359 | "mips" for VxWorks because some of the VxWorks headers \ | |
360 | construct include filenames from a root directory macro, \ | |
361 | an architecture macro and a filename, where the architecture \ | |
362 | macro expands to 'mips'. If we define 'mips' to 1, the \ | |
363 | architecture macro expands to 1 as well. */ \ | |
364 | if (!flag_iso && !TARGET_VXWORKS) \ | |
0ea339ea NS |
365 | builtin_define ("mips"); \ |
366 | \ | |
367 | if (TARGET_64BIT) \ | |
368 | builtin_define ("__mips64"); \ | |
369 | \ | |
9aaa1ee8 | 370 | if (!TARGET_IRIX6) \ |
0ea339ea NS |
371 | { \ |
372 | /* Treat _R3000 and _R4000 like register-size \ | |
373 | defines, which is how they've historically \ | |
374 | been used. */ \ | |
375 | if (TARGET_64BIT) \ | |
376 | { \ | |
377 | builtin_define_std ("R4000"); \ | |
378 | builtin_define ("_R4000"); \ | |
379 | } \ | |
380 | else \ | |
381 | { \ | |
382 | builtin_define_std ("R3000"); \ | |
383 | builtin_define ("_R3000"); \ | |
384 | } \ | |
385 | } \ | |
386 | if (TARGET_FLOAT64) \ | |
387 | builtin_define ("__mips_fpr=64"); \ | |
388 | else \ | |
389 | builtin_define ("__mips_fpr=32"); \ | |
390 | \ | |
60730ade | 391 | if (mips_base_mips16) \ |
0ea339ea NS |
392 | builtin_define ("__mips16"); \ |
393 | \ | |
394 | if (TARGET_MIPS3D) \ | |
395 | builtin_define ("__mips3d"); \ | |
396 | \ | |
397 | if (TARGET_SMARTMIPS) \ | |
398 | builtin_define ("__mips_smartmips"); \ | |
399 | \ | |
400 | if (TARGET_DSP) \ | |
401 | { \ | |
402 | builtin_define ("__mips_dsp"); \ | |
403 | if (TARGET_DSPR2) \ | |
404 | { \ | |
405 | builtin_define ("__mips_dspr2"); \ | |
406 | builtin_define ("__mips_dsp_rev=2"); \ | |
407 | } \ | |
408 | else \ | |
409 | builtin_define ("__mips_dsp_rev=1"); \ | |
410 | } \ | |
411 | \ | |
412 | MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \ | |
413 | MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \ | |
414 | \ | |
415 | if (ISA_MIPS1) \ | |
416 | { \ | |
417 | builtin_define ("__mips=1"); \ | |
418 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \ | |
419 | } \ | |
420 | else if (ISA_MIPS2) \ | |
421 | { \ | |
422 | builtin_define ("__mips=2"); \ | |
423 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \ | |
424 | } \ | |
425 | else if (ISA_MIPS3) \ | |
426 | { \ | |
427 | builtin_define ("__mips=3"); \ | |
428 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \ | |
429 | } \ | |
430 | else if (ISA_MIPS4) \ | |
431 | { \ | |
432 | builtin_define ("__mips=4"); \ | |
433 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \ | |
434 | } \ | |
435 | else if (ISA_MIPS32) \ | |
436 | { \ | |
437 | builtin_define ("__mips=32"); \ | |
438 | builtin_define ("__mips_isa_rev=1"); \ | |
439 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \ | |
440 | } \ | |
441 | else if (ISA_MIPS32R2) \ | |
442 | { \ | |
443 | builtin_define ("__mips=32"); \ | |
444 | builtin_define ("__mips_isa_rev=2"); \ | |
445 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \ | |
446 | } \ | |
447 | else if (ISA_MIPS64) \ | |
448 | { \ | |
449 | builtin_define ("__mips=64"); \ | |
450 | builtin_define ("__mips_isa_rev=1"); \ | |
451 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \ | |
f2d6ca50 AN |
452 | } \ |
453 | else if (ISA_MIPS64R2) \ | |
454 | { \ | |
455 | builtin_define ("__mips=64"); \ | |
456 | builtin_define ("__mips_isa_rev=2"); \ | |
457 | builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \ | |
0ea339ea NS |
458 | } \ |
459 | \ | |
460 | switch (mips_abi) \ | |
461 | { \ | |
462 | case ABI_32: \ | |
463 | builtin_define ("_ABIO32=1"); \ | |
464 | builtin_define ("_MIPS_SIM=_ABIO32"); \ | |
465 | break; \ | |
466 | \ | |
467 | case ABI_N32: \ | |
468 | builtin_define ("_ABIN32=2"); \ | |
469 | builtin_define ("_MIPS_SIM=_ABIN32"); \ | |
470 | break; \ | |
471 | \ | |
472 | case ABI_64: \ | |
473 | builtin_define ("_ABI64=3"); \ | |
474 | builtin_define ("_MIPS_SIM=_ABI64"); \ | |
475 | break; \ | |
476 | \ | |
477 | case ABI_O64: \ | |
478 | builtin_define ("_ABIO64=4"); \ | |
479 | builtin_define ("_MIPS_SIM=_ABIO64"); \ | |
480 | break; \ | |
481 | } \ | |
482 | \ | |
483 | builtin_define_with_int_value ("_MIPS_SZINT", INT_TYPE_SIZE); \ | |
484 | builtin_define_with_int_value ("_MIPS_SZLONG", LONG_TYPE_SIZE); \ | |
485 | builtin_define_with_int_value ("_MIPS_SZPTR", POINTER_SIZE); \ | |
486 | builtin_define_with_int_value ("_MIPS_FPSET", \ | |
487 | 32 / MAX_FPRS_PER_FMT); \ | |
488 | \ | |
489 | /* These defines reflect the ABI in use, not whether the \ | |
490 | FPU is directly accessible. */ \ | |
9f946bc1 RS |
491 | if (TARGET_NO_FLOAT) \ |
492 | builtin_define ("__mips_no_float"); \ | |
493 | else if (TARGET_HARD_FLOAT_ABI) \ | |
0ea339ea NS |
494 | builtin_define ("__mips_hard_float"); \ |
495 | else \ | |
496 | builtin_define ("__mips_soft_float"); \ | |
497 | \ | |
498 | if (TARGET_SINGLE_FLOAT) \ | |
499 | builtin_define ("__mips_single_float"); \ | |
500 | \ | |
501 | if (TARGET_PAIRED_SINGLE_FLOAT) \ | |
502 | builtin_define ("__mips_paired_single_float"); \ | |
503 | \ | |
504 | if (TARGET_BIG_ENDIAN) \ | |
505 | { \ | |
506 | builtin_define_std ("MIPSEB"); \ | |
507 | builtin_define ("_MIPSEB"); \ | |
508 | } \ | |
509 | else \ | |
510 | { \ | |
511 | builtin_define_std ("MIPSEL"); \ | |
512 | builtin_define ("_MIPSEL"); \ | |
513 | } \ | |
93581857 | 514 | \ |
cf51e479 RS |
515 | /* Whether calls should go through $25. The separate __PIC__ \ |
516 | macro indicates whether abicalls code might use a GOT. */ \ | |
517 | if (TARGET_ABICALLS) \ | |
518 | builtin_define ("__mips_abicalls"); \ | |
519 | \ | |
93581857 MS |
520 | /* Whether Loongson vector modes are enabled. */ \ |
521 | if (TARGET_LOONGSON_VECTORS) \ | |
522 | builtin_define ("__mips_loongson_vector_rev"); \ | |
0ea339ea | 523 | \ |
d97e6aca AN |
524 | /* Historical Octeon macro. */ \ |
525 | if (TARGET_OCTEON) \ | |
526 | builtin_define ("__OCTEON__"); \ | |
527 | \ | |
0ea339ea NS |
528 | /* Macros dependent on the C dialect. */ \ |
529 | if (preprocessing_asm_p ()) \ | |
530 | { \ | |
531 | builtin_define_std ("LANGUAGE_ASSEMBLY"); \ | |
532 | builtin_define ("_LANGUAGE_ASSEMBLY"); \ | |
533 | } \ | |
534 | else if (c_dialect_cxx ()) \ | |
535 | { \ | |
536 | builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \ | |
537 | builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \ | |
538 | builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \ | |
539 | } \ | |
540 | else \ | |
541 | { \ | |
542 | builtin_define_std ("LANGUAGE_C"); \ | |
543 | builtin_define ("_LANGUAGE_C"); \ | |
544 | } \ | |
545 | if (c_dialect_objc ()) \ | |
546 | { \ | |
547 | builtin_define ("_LANGUAGE_OBJECTIVE_C"); \ | |
548 | builtin_define ("__LANGUAGE_OBJECTIVE_C"); \ | |
549 | /* Bizarre, but needed at least for Irix. */ \ | |
550 | builtin_define_std ("LANGUAGE_C"); \ | |
551 | builtin_define ("_LANGUAGE_C"); \ | |
552 | } \ | |
553 | \ | |
554 | if (mips_abi == ABI_EABI) \ | |
555 | builtin_define ("__mips_eabi"); \ | |
4d210b07 RS |
556 | \ |
557 | if (TARGET_CACHE_BUILTIN) \ | |
558 | builtin_define ("__GCC_HAVE_BUILTIN_MIPS_CACHE"); \ | |
0ea339ea NS |
559 | } \ |
560 | while (0) | |
ce3649d2 | 561 | |
149e4e00 MM |
562 | /* Default target_flags if no switches are specified */ |
563 | ||
564 | #ifndef TARGET_DEFAULT | |
565 | #define TARGET_DEFAULT 0 | |
566 | #endif | |
567 | ||
404f986e MM |
568 | #ifndef TARGET_CPU_DEFAULT |
569 | #define TARGET_CPU_DEFAULT 0 | |
570 | #endif | |
571 | ||
96abdcb1 | 572 | #ifndef TARGET_ENDIAN_DEFAULT |
96abdcb1 | 573 | #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN |
96abdcb1 ILT |
574 | #endif |
575 | ||
50d32cf6 JW |
576 | #ifndef TARGET_FP_EXCEPTIONS_DEFAULT |
577 | #define TARGET_FP_EXCEPTIONS_DEFAULT MASK_FP_EXCEPTIONS | |
578 | #endif | |
579 | ||
a27fb29b | 580 | /* 'from-abi' makes a good default: you get whatever the ABI requires. */ |
ea09f032 | 581 | #ifndef MIPS_ISA_DEFAULT |
a27fb29b RS |
582 | #ifndef MIPS_CPU_STRING_DEFAULT |
583 | #define MIPS_CPU_STRING_DEFAULT "from-abi" | |
584 | #endif | |
ea09f032 GRK |
585 | #endif |
586 | ||
996ed075 JJ |
587 | #ifdef IN_LIBGCC2 |
588 | #undef TARGET_64BIT | |
589 | /* Make this compile time constant for libgcc2 */ | |
590 | #ifdef __mips64 | |
591 | #define TARGET_64BIT 1 | |
592 | #else | |
593 | #define TARGET_64BIT 0 | |
594 | #endif | |
440927ec | 595 | #endif /* IN_LIBGCC2 */ |
996ed075 | 596 | |
56e449d3 SL |
597 | /* Force the call stack unwinders in unwind.inc not to be MIPS16 code |
598 | when compiled with hardware floating point. This is because MIPS16 | |
599 | code cannot save and restore the floating-point registers, which is | |
600 | important if in a mixed MIPS16/non-MIPS16 environment. */ | |
601 | ||
602 | #ifdef IN_LIBGCC2 | |
603 | #if __mips_hard_float | |
604 | #define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((__nomips16__)) | |
605 | #endif | |
606 | #endif /* IN_LIBGCC2 */ | |
607 | ||
a0cfeb0f DD |
608 | #define TARGET_LIBGCC_SDATA_SECTION ".sdata" |
609 | ||
cbab8d02 | 610 | #ifndef MULTILIB_ENDIAN_DEFAULT |
7f2e00db | 611 | #if TARGET_ENDIAN_DEFAULT == 0 |
cbab8d02 | 612 | #define MULTILIB_ENDIAN_DEFAULT "EL" |
7f2e00db | 613 | #else |
cbab8d02 GRK |
614 | #define MULTILIB_ENDIAN_DEFAULT "EB" |
615 | #endif | |
7f2e00db | 616 | #endif |
cbab8d02 | 617 | |
ea09f032 | 618 | #ifndef MULTILIB_ISA_DEFAULT |
7ce2fcb9 KG |
619 | # if MIPS_ISA_DEFAULT == 1 |
620 | # define MULTILIB_ISA_DEFAULT "mips1" | |
621 | # else | |
622 | # if MIPS_ISA_DEFAULT == 2 | |
623 | # define MULTILIB_ISA_DEFAULT "mips2" | |
624 | # else | |
625 | # if MIPS_ISA_DEFAULT == 3 | |
626 | # define MULTILIB_ISA_DEFAULT "mips3" | |
627 | # else | |
628 | # if MIPS_ISA_DEFAULT == 4 | |
629 | # define MULTILIB_ISA_DEFAULT "mips4" | |
630 | # else | |
0e5a4ad8 EC |
631 | # if MIPS_ISA_DEFAULT == 32 |
632 | # define MULTILIB_ISA_DEFAULT "mips32" | |
633 | # else | |
2d2a50c3 CD |
634 | # if MIPS_ISA_DEFAULT == 33 |
635 | # define MULTILIB_ISA_DEFAULT "mips32r2" | |
0e5a4ad8 | 636 | # else |
2d2a50c3 CD |
637 | # if MIPS_ISA_DEFAULT == 64 |
638 | # define MULTILIB_ISA_DEFAULT "mips64" | |
639 | # else | |
f2d6ca50 AN |
640 | # if MIPS_ISA_DEFAULT == 65 |
641 | # define MULTILIB_ISA_DEFAULT "mips64r2" | |
642 | # else | |
643 | # define MULTILIB_ISA_DEFAULT "mips1" | |
644 | # endif | |
2d2a50c3 CD |
645 | # endif |
646 | # endif | |
647 | # endif | |
7ce2fcb9 KG |
648 | # endif |
649 | # endif | |
650 | # endif | |
651 | # endif | |
ea09f032 GRK |
652 | #endif |
653 | ||
1ab8a8c2 JM |
654 | #ifndef MIPS_ABI_DEFAULT |
655 | #define MIPS_ABI_DEFAULT ABI_32 | |
656 | #endif | |
657 | ||
658 | /* Use the most portable ABI flag for the ASM specs. */ | |
659 | ||
660 | #if MIPS_ABI_DEFAULT == ABI_32 | |
661 | #define MULTILIB_ABI_DEFAULT "mabi=32" | |
662 | #endif | |
663 | ||
664 | #if MIPS_ABI_DEFAULT == ABI_O64 | |
665 | #define MULTILIB_ABI_DEFAULT "mabi=o64" | |
666 | #endif | |
667 | ||
668 | #if MIPS_ABI_DEFAULT == ABI_N32 | |
669 | #define MULTILIB_ABI_DEFAULT "mabi=n32" | |
670 | #endif | |
671 | ||
672 | #if MIPS_ABI_DEFAULT == ABI_64 | |
673 | #define MULTILIB_ABI_DEFAULT "mabi=64" | |
674 | #endif | |
675 | ||
676 | #if MIPS_ABI_DEFAULT == ABI_EABI | |
677 | #define MULTILIB_ABI_DEFAULT "mabi=eabi" | |
678 | #endif | |
679 | ||
cbab8d02 | 680 | #ifndef MULTILIB_DEFAULTS |
a27fb29b RS |
681 | #define MULTILIB_DEFAULTS \ |
682 | { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT } | |
7f2e00db RK |
683 | #endif |
684 | ||
34bcd7fd JW |
685 | /* We must pass -EL to the linker by default for little endian embedded |
686 | targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the | |
687 | linker will default to using big-endian output files. The OUTPUT_FORMAT | |
688 | line must be in the linker script, otherwise -EB/-EL will not work. */ | |
689 | ||
120dc6cd | 690 | #ifndef ENDIAN_SPEC |
34bcd7fd | 691 | #if TARGET_ENDIAN_DEFAULT == 0 |
ac282977 | 692 | #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}" |
34bcd7fd | 693 | #else |
ac282977 | 694 | #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}" |
34bcd7fd JW |
695 | #endif |
696 | #endif | |
697 | ||
e2c14f5d RS |
698 | /* A spec condition that matches all non-mips16 -mips arguments. */ |
699 | ||
700 | #define MIPS_ISA_LEVEL_OPTION_SPEC \ | |
701 | "mips1|mips2|mips3|mips4|mips32*|mips64*" | |
702 | ||
703 | /* A spec condition that matches all non-mips16 architecture arguments. */ | |
704 | ||
705 | #define MIPS_ARCH_OPTION_SPEC \ | |
706 | MIPS_ISA_LEVEL_OPTION_SPEC "|march=*" | |
707 | ||
0ea339ea NS |
708 | /* A spec that infers a -mips argument from an -march argument, |
709 | or injects the default if no architecture is specified. */ | |
e2c14f5d RS |
710 | |
711 | #define MIPS_ISA_LEVEL_SPEC \ | |
712 | "%{" MIPS_ISA_LEVEL_OPTION_SPEC ":;: \ | |
713 | %{march=mips1|march=r2000|march=r3000|march=r3900:-mips1} \ | |
714 | %{march=mips2|march=r6000:-mips2} \ | |
33db2060 | 715 | %{march=mips3|march=r4*|march=vr4*|march=orion|march=loongson2*:-mips3} \ |
304b14b1 JK |
716 | %{march=mips4|march=r8000|march=vr5*|march=rm7000|march=rm9000 \ |
717 | |march=r10000|march=r12000|march=r14000|march=r16000:-mips4} \ | |
9e32002f RS |
718 | %{march=mips32|march=4kc|march=4km|march=4kp|march=4ksc:-mips32} \ |
719 | %{march=mips32r2|march=m4k|march=4ke*|march=4ksd|march=24k* \ | |
5dce6dbd | 720 | |march=34k*|march=74k*|march=1004k*: -mips32r2} \ |
0051ef59 | 721 | %{march=mips64|march=5k*|march=20k*|march=sb1*|march=sr71000 \ |
98824c6f | 722 | |march=xlr|march=loongson3a: -mips64} \ |
d97e6aca | 723 | %{march=mips64r2|march=octeon: -mips64r2} \ |
0ea339ea NS |
724 | %{!march=*: -" MULTILIB_ISA_DEFAULT "}}" |
725 | ||
7d8bed7b RS |
726 | /* A spec that infers a -mhard-float or -msoft-float setting from an |
727 | -march argument. Note that soft-float and hard-float code are not | |
728 | link-compatible. */ | |
729 | ||
730 | #define MIPS_ARCH_FLOAT_SPEC \ | |
731 | "%{mhard-float|msoft-float|march=mips*:; \ | |
732 | march=vr41*|march=m4k|march=4k*|march=24kc|march=24kec \ | |
5dce6dbd SL |
733 | |march=34kc|march=74kc|march=1004kc|march=5kc \ |
734 | |march=octeon|march=xlr: -msoft-float; \ | |
7d8bed7b RS |
735 | march=*: -mhard-float}" |
736 | ||
0ea339ea NS |
737 | /* A spec condition that matches 32-bit options. It only works if |
738 | MIPS_ISA_LEVEL_SPEC has been applied. */ | |
739 | ||
740 | #define MIPS_32BIT_OPTION_SPEC \ | |
741 | "mips1|mips2|mips32*|mgp32" | |
e2c14f5d | 742 | |
1ab8a8c2 JM |
743 | #if MIPS_ABI_DEFAULT == ABI_O64 \ |
744 | || MIPS_ABI_DEFAULT == ABI_N32 \ | |
745 | || MIPS_ABI_DEFAULT == ABI_64 | |
746 | #define OPT_ARCH64 "mabi=32|mgp32:;" | |
747 | #define OPT_ARCH32 "mabi=32|mgp32" | |
748 | #else | |
749 | #define OPT_ARCH64 "mabi=o64|mabi=n32|mabi=64|mgp64" | |
750 | #define OPT_ARCH32 "mabi=o64|mabi=n32|mabi=64|mgp64:;" | |
751 | #endif | |
752 | ||
7816bea0 DJ |
753 | /* Support for a compile-time default CPU, et cetera. The rules are: |
754 | --with-arch is ignored if -march is specified or a -mips is specified | |
1ab8a8c2 JM |
755 | (other than -mips16); likewise --with-arch-32 and --with-arch-64. |
756 | --with-tune is ignored if -mtune is specified; likewise | |
757 | --with-tune-32 and --with-tune-64. | |
7816bea0 DJ |
758 | --with-abi is ignored if -mabi is specified. |
759 | --with-float is ignored if -mhard-float or -msoft-float are | |
9f0df97a DD |
760 | specified. |
761 | --with-divide is ignored if -mdivide-traps or -mdivide-breaks are | |
762 | specified. */ | |
7816bea0 | 763 | #define OPTION_DEFAULT_SPECS \ |
e2c14f5d | 764 | {"arch", "%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}" }, \ |
1ab8a8c2 JM |
765 | {"arch_32", "%{" OPT_ARCH32 ":%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}}" }, \ |
766 | {"arch_64", "%{" OPT_ARCH64 ":%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}}" }, \ | |
7816bea0 | 767 | {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \ |
1ab8a8c2 JM |
768 | {"tune_32", "%{" OPT_ARCH32 ":%{!mtune=*:-mtune=%(VALUE)}}" }, \ |
769 | {"tune_64", "%{" OPT_ARCH64 ":%{!mtune=*:-mtune=%(VALUE)}}" }, \ | |
7816bea0 | 770 | {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \ |
9f0df97a | 771 | {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \ |
66471b47 | 772 | {"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }, \ |
e21d5757 | 773 | {"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }, \ |
b96c5923 DD |
774 | {"mips-plt", "%{!mplt:%{!mno-plt:-m%(VALUE)}}" }, \ |
775 | {"synci", "%{!msynci:%{!mno-synci:-m%(VALUE)}}" } | |
9f0df97a | 776 | |
7816bea0 | 777 | |
7f75ae86 CM |
778 | /* A spec that infers the -mdsp setting from an -march argument. */ |
779 | #define BASE_DRIVER_SELF_SPECS \ | |
037f9973 CM |
780 | "%{!mno-dsp: \ |
781 | %{march=24ke*|march=34k*|march=1004k*: -mdsp} \ | |
782 | %{march=74k*:%{!mno-dspr2: -mdspr2 -mdsp}}}" | |
7f75ae86 CM |
783 | |
784 | #define DRIVER_SELF_SPECS BASE_DRIVER_SELF_SPECS | |
785 | ||
9f0df97a DD |
786 | #define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \ |
787 | && ISA_HAS_COND_TRAP) | |
7816bea0 | 788 | |
0da4c1ea | 789 | #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY && !TARGET_MIPS16) |
e4f5c5d6 | 790 | |
a27fb29b RS |
791 | /* True if the ABI can only work with 64-bit integer registers. We |
792 | generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but | |
793 | otherwise floating-point registers must also be 64-bit. */ | |
7f9be256 | 794 | #define ABI_NEEDS_64BIT_REGS (TARGET_NEWABI || mips_abi == ABI_O64) |
a27fb29b RS |
795 | |
796 | /* Likewise for 32-bit regs. */ | |
797 | #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32) | |
798 | ||
2e8a796f RS |
799 | /* True if the file format uses 64-bit symbols. At present, this is |
800 | only true for n64, which uses 64-bit ELF. */ | |
801 | #define FILE_HAS_64BIT_SYMBOLS (mips_abi == ABI_64) | |
802 | ||
803 | /* True if symbols are 64 bits wide. This is usually determined by | |
804 | the ABI's file format, but it can be overridden by -msym32. Note that | |
805 | overriding the size with -msym32 changes the ABI of relocatable objects, | |
806 | although it doesn't change the ABI of a fully-linked object. */ | |
807 | #define ABI_HAS_64BIT_SYMBOLS (FILE_HAS_64BIT_SYMBOLS && !TARGET_SYM32) | |
cafe096b | 808 | |
85f65093 | 809 | /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3). */ |
8f2e3902 EC |
810 | #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \ |
811 | || ISA_MIPS4 \ | |
f2d6ca50 AN |
812 | || ISA_MIPS64 \ |
813 | || ISA_MIPS64R2) | |
1d5d552e | 814 | |
112cdef5 | 815 | /* ISA has branch likely instructions (e.g. mips2). */ |
7dac2f89 EC |
816 | /* Disable branchlikely for tx39 until compare rewrite. They haven't |
817 | been generated up to this point. */ | |
5c8a81d5 | 818 | #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1) |
1d5d552e | 819 | |
2f8e468b | 820 | /* ISA has a three-operand multiplication instruction (usually spelt "mul"). */ |
3f07249e RS |
821 | #define ISA_HAS_MUL3 ((TARGET_MIPS3900 \ |
822 | || TARGET_MIPS5400 \ | |
823 | || TARGET_MIPS5500 \ | |
824 | || TARGET_MIPS7000 \ | |
825 | || TARGET_MIPS9000 \ | |
826 | || TARGET_MAD \ | |
827 | || ISA_MIPS32 \ | |
828 | || ISA_MIPS32R2 \ | |
f2d6ca50 AN |
829 | || ISA_MIPS64 \ |
830 | || ISA_MIPS64R2) \ | |
3f07249e RS |
831 | && !TARGET_MIPS16) |
832 | ||
d6d3e623 | 833 | /* ISA has a three-operand multiplication instruction. */ |
aa5409e7 AN |
834 | #define ISA_HAS_DMUL3 (TARGET_64BIT \ |
835 | && TARGET_OCTEON \ | |
836 | && !TARGET_MIPS16) | |
d6d3e623 | 837 | |
b51469a5 MK |
838 | /* ISA has the floating-point conditional move instructions introduced |
839 | in mips4. */ | |
840 | #define ISA_HAS_FP_CONDMOVE ((ISA_MIPS4 \ | |
3f07249e RS |
841 | || ISA_MIPS32 \ |
842 | || ISA_MIPS32R2 \ | |
f2d6ca50 AN |
843 | || ISA_MIPS64 \ |
844 | || ISA_MIPS64R2) \ | |
3f07249e | 845 | && !TARGET_MIPS5500 \ |
ce3649d2 | 846 | && !TARGET_MIPS16) |
76ee8042 | 847 | |
b51469a5 MK |
848 | /* ISA has the integer conditional move instructions introduced in mips4 and |
849 | ST Loongson 2E/2F. */ | |
850 | #define ISA_HAS_CONDMOVE (ISA_HAS_FP_CONDMOVE || TARGET_LOONGSON_2EF) | |
851 | ||
f457938f RS |
852 | /* ISA has LDC1 and SDC1. */ |
853 | #define ISA_HAS_LDC1_SDC1 (!ISA_MIPS1 && !TARGET_MIPS16) | |
854 | ||
76ee8042 | 855 | /* ISA has the mips4 FP condition code instructions: FP-compare to CC, |
987ba558 | 856 | branch on CC, and move (both FP and non-FP) on CC. */ |
ce3649d2 | 857 | #define ISA_HAS_8CC (ISA_MIPS4 \ |
3f07249e RS |
858 | || ISA_MIPS32 \ |
859 | || ISA_MIPS32R2 \ | |
f2d6ca50 AN |
860 | || ISA_MIPS64 \ |
861 | || ISA_MIPS64R2) | |
76ee8042 | 862 | |
4dbe1556 CD |
863 | /* This is a catch all for other mips4 instructions: indexed load, the |
864 | FP madd and msub instructions, and the FP recip and recip sqrt | |
865 | instructions. */ | |
3f07249e | 866 | #define ISA_HAS_FP4 ((ISA_MIPS4 \ |
6f428062 | 867 | || (ISA_MIPS32R2 && TARGET_FLOAT64) \ |
f2d6ca50 AN |
868 | || ISA_MIPS64 \ |
869 | || ISA_MIPS64R2) \ | |
3f07249e | 870 | && !TARGET_MIPS16) |
76ee8042 | 871 | |
e5a2b69d | 872 | /* ISA has paired-single instructions. */ |
f2d6ca50 | 873 | #define ISA_HAS_PAIRED_SINGLE (ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2) |
e5a2b69d | 874 | |
a0b6cdee | 875 | /* ISA has conditional trap instructions. */ |
ce3649d2 EC |
876 | #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \ |
877 | && !TARGET_MIPS16) | |
1d5d552e | 878 | |
12bf26b6 | 879 | /* ISA has integer multiply-accumulate instructions, madd and msub. */ |
3f07249e | 880 | #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \ |
2d2a50c3 | 881 | || ISA_MIPS32R2 \ |
f2d6ca50 AN |
882 | || ISA_MIPS64 \ |
883 | || ISA_MIPS64R2) \ | |
3f07249e | 884 | && !TARGET_MIPS16) |
0e5a4ad8 | 885 | |
8dd58f01 DU |
886 | /* Integer multiply-accumulate instructions should be generated. */ |
887 | #define GENERATE_MADD_MSUB (ISA_HAS_MADD_MSUB && !TUNE_74K) | |
888 | ||
b51469a5 MK |
889 | /* ISA has floating-point madd and msub instructions 'd = a * b [+-] c'. */ |
890 | #define ISA_HAS_FP_MADD4_MSUB4 ISA_HAS_FP4 | |
891 | ||
892 | /* ISA has floating-point madd and msub instructions 'c = a * b [+-] c'. */ | |
893 | #define ISA_HAS_FP_MADD3_MSUB3 TARGET_LOONGSON_2EF | |
894 | ||
895 | /* ISA has floating-point nmadd and nmsub instructions | |
896 | 'd = -((a * b) [+-] c)'. */ | |
897 | #define ISA_HAS_NMADD4_NMSUB4(MODE) \ | |
e5a2b69d RS |
898 | ((ISA_MIPS4 \ |
899 | || (ISA_MIPS32R2 && (MODE) == V2SFmode) \ | |
f2d6ca50 AN |
900 | || ISA_MIPS64 \ |
901 | || ISA_MIPS64R2) \ | |
3f07249e RS |
902 | && (!TARGET_MIPS5400 || TARGET_MAD) \ |
903 | && !TARGET_MIPS16) | |
149e4e00 | 904 | |
b51469a5 MK |
905 | /* ISA has floating-point nmadd and nmsub instructions |
906 | 'c = -((a * b) [+-] c)'. */ | |
907 | #define ISA_HAS_NMADD3_NMSUB3(MODE) \ | |
908 | TARGET_LOONGSON_2EF | |
909 | ||
0e5a4ad8 | 910 | /* ISA has count leading zeroes/ones instruction (not implemented). */ |
3f07249e RS |
911 | #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \ |
912 | || ISA_MIPS32R2 \ | |
f2d6ca50 AN |
913 | || ISA_MIPS64 \ |
914 | || ISA_MIPS64R2) \ | |
ce3649d2 | 915 | && !TARGET_MIPS16) |
0e5a4ad8 | 916 | |
5ce6f47b EC |
917 | /* ISA has three operand multiply instructions that put |
918 | the high part in an accumulator: mulhi or mulhiu. */ | |
3f07249e RS |
919 | #define ISA_HAS_MULHI ((TARGET_MIPS5400 \ |
920 | || TARGET_MIPS5500 \ | |
921 | || TARGET_SR71K) \ | |
922 | && !TARGET_MIPS16) | |
5ce6f47b EC |
923 | |
924 | /* ISA has three operand multiply instructions that | |
925 | negates the result and puts the result in an accumulator. */ | |
3f07249e RS |
926 | #define ISA_HAS_MULS ((TARGET_MIPS5400 \ |
927 | || TARGET_MIPS5500 \ | |
928 | || TARGET_SR71K) \ | |
929 | && !TARGET_MIPS16) | |
5ce6f47b EC |
930 | |
931 | /* ISA has three operand multiply instructions that subtracts the | |
932 | result from a 4th operand and puts the result in an accumulator. */ | |
3f07249e RS |
933 | #define ISA_HAS_MSAC ((TARGET_MIPS5400 \ |
934 | || TARGET_MIPS5500 \ | |
935 | || TARGET_SR71K) \ | |
936 | && !TARGET_MIPS16) | |
937 | ||
5ce6f47b EC |
938 | /* ISA has three operand multiply instructions that the result |
939 | from a 4th operand and puts the result in an accumulator. */ | |
3f07249e RS |
940 | #define ISA_HAS_MACC ((TARGET_MIPS4120 \ |
941 | || TARGET_MIPS4130 \ | |
942 | || TARGET_MIPS5400 \ | |
943 | || TARGET_MIPS5500 \ | |
944 | || TARGET_SR71K) \ | |
945 | && !TARGET_MIPS16) | |
5ce6f47b | 946 | |
0ac40e7a | 947 | /* ISA has NEC VR-style MACC, MACCHI, DMACC and DMACCHI instructions. */ |
3f07249e RS |
948 | #define ISA_HAS_MACCHI ((TARGET_MIPS4120 \ |
949 | || TARGET_MIPS4130) \ | |
950 | && !TARGET_MIPS16) | |
951 | ||
952 | /* ISA has the "ror" (rotate right) instructions. */ | |
953 | #define ISA_HAS_ROR ((ISA_MIPS32R2 \ | |
f2d6ca50 | 954 | || ISA_MIPS64R2 \ |
3f07249e RS |
955 | || TARGET_MIPS5400 \ |
956 | || TARGET_MIPS5500 \ | |
0aa222d1 SL |
957 | || TARGET_SR71K \ |
958 | || TARGET_SMARTMIPS) \ | |
3f07249e | 959 | && !TARGET_MIPS16) |
5ce6f47b | 960 | |
4dbe1556 | 961 | /* ISA has data prefetch instructions. This controls use of 'pref'. */ |
8f2e3902 | 962 | #define ISA_HAS_PREFETCH ((ISA_MIPS4 \ |
1a0f175d | 963 | || TARGET_LOONGSON_2EF \ |
8f2e3902 | 964 | || ISA_MIPS32 \ |
2d2a50c3 | 965 | || ISA_MIPS32R2 \ |
f2d6ca50 AN |
966 | || ISA_MIPS64 \ |
967 | || ISA_MIPS64R2) \ | |
8f2e3902 EC |
968 | && !TARGET_MIPS16) |
969 | ||
4dbe1556 CD |
970 | /* ISA has data indexed prefetch instructions. This controls use of |
971 | 'prefx', along with TARGET_HARD_FLOAT and TARGET_DOUBLE_FLOAT. | |
972 | (prefx is a cop1x instruction, so can only be used if FP is | |
973 | enabled.) */ | |
3f07249e | 974 | #define ISA_HAS_PREFETCHX ((ISA_MIPS4 \ |
daca5b05 | 975 | || ISA_MIPS32R2 \ |
f2d6ca50 AN |
976 | || ISA_MIPS64 \ |
977 | || ISA_MIPS64R2) \ | |
3f07249e | 978 | && !TARGET_MIPS16) |
4dbe1556 | 979 | |
8214bf98 RS |
980 | /* True if trunc.w.s and trunc.w.d are real (not synthetic) |
981 | instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d | |
982 | also requires TARGET_DOUBLE_FLOAT. */ | |
983 | #define ISA_HAS_TRUNC_W (!ISA_MIPS1) | |
984 | ||
2d2a50c3 | 985 | /* ISA includes the MIPS32r2 seb and seh instructions. */ |
f2d6ca50 AN |
986 | #define ISA_HAS_SEB_SEH ((ISA_MIPS32R2 \ |
987 | || ISA_MIPS64R2) \ | |
3f07249e | 988 | && !TARGET_MIPS16) |
2d2a50c3 | 989 | |
e689b870 | 990 | /* ISA includes the MIPS32/64 rev 2 ext and ins instructions. */ |
f2d6ca50 AN |
991 | #define ISA_HAS_EXT_INS ((ISA_MIPS32R2 \ |
992 | || ISA_MIPS64R2) \ | |
3f07249e | 993 | && !TARGET_MIPS16) |
e689b870 | 994 | |
85f65093 | 995 | /* ISA has instructions for accessing top part of 64-bit fp regs. */ |
f2d6ca50 AN |
996 | #define ISA_HAS_MXHC1 (TARGET_FLOAT64 \ |
997 | && (ISA_MIPS32R2 \ | |
998 | || ISA_MIPS64R2)) | |
6f428062 | 999 | |
0aa222d1 SL |
1000 | /* ISA has lwxs instruction (load w/scaled index address. */ |
1001 | #define ISA_HAS_LWXS (TARGET_SMARTMIPS && !TARGET_MIPS16) | |
1002 | ||
254d1646 RS |
1003 | /* The DSP ASE is available. */ |
1004 | #define ISA_HAS_DSP (TARGET_DSP && !TARGET_MIPS16) | |
1005 | ||
1006 | /* Revision 2 of the DSP ASE is available. */ | |
1007 | #define ISA_HAS_DSPR2 (TARGET_DSPR2 && !TARGET_MIPS16) | |
1008 | ||
21c9500d RS |
1009 | /* True if the result of a load is not available to the next instruction. |
1010 | A nop will then be needed between instructions like "lw $4,..." | |
1011 | and "addiu $4,$4,1". */ | |
3f07249e | 1012 | #define ISA_HAS_LOAD_DELAY (ISA_MIPS1 \ |
21c9500d RS |
1013 | && !TARGET_MIPS3900 \ |
1014 | && !TARGET_MIPS16) | |
1015 | ||
1016 | /* Likewise mtc1 and mfc1. */ | |
58684fa0 MK |
1017 | #define ISA_HAS_XFER_DELAY (mips_isa <= 3 \ |
1018 | && !TARGET_LOONGSON_2EF) | |
21c9500d RS |
1019 | |
1020 | /* Likewise floating-point comparisons. */ | |
58684fa0 MK |
1021 | #define ISA_HAS_FCMP_DELAY (mips_isa <= 3 \ |
1022 | && !TARGET_LOONGSON_2EF) | |
21c9500d RS |
1023 | |
1024 | /* True if mflo and mfhi can be immediately followed by instructions | |
fdcf1e1e CD |
1025 | which write to the HI and LO registers. |
1026 | ||
1027 | According to MIPS specifications, MIPS ISAs I, II, and III need | |
1028 | (at least) two instructions between the reads of HI/LO and | |
1029 | instructions which write them, and later ISAs do not. Contradicting | |
1030 | the MIPS specifications, some MIPS IV processor user manuals (e.g. | |
1031 | the UM for the NEC Vr5000) document needing the instructions between | |
1032 | HI/LO reads and writes, as well. Therefore, we declare only MIPS32, | |
1033 | MIPS64 and later ISAs to have the interlocks, plus any specific | |
1034 | earlier-ISA CPUs for which CPU documentation declares that the | |
1035 | instructions are really interlocked. */ | |
1036 | #define ISA_HAS_HILO_INTERLOCKS (ISA_MIPS32 \ | |
1037 | || ISA_MIPS32R2 \ | |
1038 | || ISA_MIPS64 \ | |
f2d6ca50 | 1039 | || ISA_MIPS64R2 \ |
58684fa0 MK |
1040 | || TARGET_MIPS5500 \ |
1041 | || TARGET_LOONGSON_2EF) | |
df770e04 DD |
1042 | |
1043 | /* ISA includes synci, jr.hb and jalr.hb. */ | |
f2d6ca50 AN |
1044 | #define ISA_HAS_SYNCI ((ISA_MIPS32R2 \ |
1045 | || ISA_MIPS64R2) \ | |
1046 | && !TARGET_MIPS16) | |
df770e04 | 1047 | |
8d2fc1c4 DD |
1048 | /* ISA includes sync. */ |
1049 | #define ISA_HAS_SYNC ((mips_isa >= 2 || TARGET_MIPS3900) && !TARGET_MIPS16) | |
e9276c30 RS |
1050 | #define GENERATE_SYNC \ |
1051 | (target_flags_explicit & MASK_LLSC \ | |
1052 | ? TARGET_LLSC && !TARGET_MIPS16 \ | |
1053 | : ISA_HAS_SYNC) | |
8d2fc1c4 DD |
1054 | |
1055 | /* ISA includes ll and sc. Note that this implies ISA_HAS_SYNC | |
1056 | because the expanders use both ISA_HAS_SYNC and ISA_HAS_LL_SC | |
1057 | instructions. */ | |
1058 | #define ISA_HAS_LL_SC (mips_isa >= 2 && !TARGET_MIPS16) | |
e9276c30 RS |
1059 | #define GENERATE_LL_SC \ |
1060 | (target_flags_explicit & MASK_LLSC \ | |
1061 | ? TARGET_LLSC && !TARGET_MIPS16 \ | |
1062 | : ISA_HAS_LL_SC) | |
d97e6aca | 1063 | |
7846e5f9 | 1064 | /* ISA includes the baddu instruction. */ |
aa5409e7 | 1065 | #define ISA_HAS_BADDU (TARGET_OCTEON && !TARGET_MIPS16) |
7846e5f9 | 1066 | |
95f6fc60 | 1067 | /* ISA includes the bbit* instructions. */ |
aa5409e7 | 1068 | #define ISA_HAS_BBIT (TARGET_OCTEON && !TARGET_MIPS16) |
95f6fc60 | 1069 | |
49912bcd | 1070 | /* ISA includes the cins instruction. */ |
aa5409e7 | 1071 | #define ISA_HAS_CINS (TARGET_OCTEON && !TARGET_MIPS16) |
49912bcd | 1072 | |
c8424132 | 1073 | /* ISA includes the exts instruction. */ |
aa5409e7 | 1074 | #define ISA_HAS_EXTS (TARGET_OCTEON && !TARGET_MIPS16) |
c8424132 | 1075 | |
5299815b | 1076 | /* ISA includes the seq and sne instructions. */ |
aa5409e7 | 1077 | #define ISA_HAS_SEQ_SNE (TARGET_OCTEON && !TARGET_MIPS16) |
5299815b | 1078 | |
d97e6aca | 1079 | /* ISA includes the pop instruction. */ |
aa5409e7 | 1080 | #define ISA_HAS_POP (TARGET_OCTEON && !TARGET_MIPS16) |
4d210b07 RS |
1081 | |
1082 | /* The CACHE instruction is available in non-MIPS16 code. */ | |
1083 | #define TARGET_CACHE_BUILTIN (mips_isa >= 3) | |
1084 | ||
1085 | /* The CACHE instruction is available. */ | |
1086 | #define ISA_HAS_CACHE (TARGET_CACHE_BUILTIN && !TARGET_MIPS16) | |
e75b25e7 | 1087 | \f |
59c94430 MM |
1088 | /* Tell collect what flags to pass to nm. */ |
1089 | #ifndef NM_FLAGS | |
2ce3c6c6 | 1090 | #define NM_FLAGS "-Bn" |
59c94430 MM |
1091 | #endif |
1092 | ||
e75b25e7 | 1093 | \f |
4e88bbcd ILT |
1094 | /* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options |
1095 | to the assembler. It may be overridden by subtargets. */ | |
1096 | #ifndef SUBTARGET_ASM_OPTIMIZING_SPEC | |
1097 | #define SUBTARGET_ASM_OPTIMIZING_SPEC "\ | |
bb98bc58 | 1098 | %{noasmopt:-O0} \ |
4e88bbcd ILT |
1099 | %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}" |
1100 | #endif | |
1101 | ||
1102 | /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to | |
5811cb27 RS |
1103 | the assembler. It may be overridden by subtargets. |
1104 | ||
1105 | Beginning with gas 2.13, -mdebug must be passed to correctly handle | |
1106 | COFF debugging info. */ | |
1107 | ||
4e88bbcd ILT |
1108 | #ifndef SUBTARGET_ASM_DEBUGGING_SPEC |
1109 | #define SUBTARGET_ASM_DEBUGGING_SPEC "\ | |
bb98bc58 JW |
1110 | %{g} %{g0} %{g1} %{g2} %{g3} \ |
1111 | %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \ | |
1112 | %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \ | |
1113 | %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \ | |
6d439235 | 1114 | %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \ |
5811cb27 | 1115 | %{gcoff*:-mdebug} %{!gcoff*:-no-mdebug}" |
4e88bbcd | 1116 | #endif |
bb98bc58 | 1117 | |
4e88bbcd ILT |
1118 | /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be |
1119 | overridden by subtargets. */ | |
1120 | ||
1121 | #ifndef SUBTARGET_ASM_SPEC | |
1122 | #define SUBTARGET_ASM_SPEC "" | |
bb98bc58 | 1123 | #endif |
4e88bbcd | 1124 | |
b2bcb32d | 1125 | #undef ASM_SPEC |
4e88bbcd | 1126 | #define ASM_SPEC "\ |
2d2a50c3 | 1127 | %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \ |
f2d6ca50 | 1128 | %{mips32*} %{mips64*} \ |
500fc425 TS |
1129 | %{mips16} %{mno-mips16:-no-mips16} \ |
1130 | %{mips3d} %{mno-mips3d:-no-mips3d} \ | |
1131 | %{mdmx} %{mno-mdmx:-no-mdmx} \ | |
1132 | %{mdsp} %{mno-dsp} \ | |
1133 | %{mdspr2} %{mno-dspr2} \ | |
0aa222d1 | 1134 | %{msmartmips} %{mno-smartmips} \ |
500fc425 | 1135 | %{mmt} %{mno-mt} \ |
0ac40e7a | 1136 | %{mfix-vr4120} %{mfix-vr4130} \ |
0eda4033 | 1137 | %{mfix-24k} \ |
4e88bbcd ILT |
1138 | %(subtarget_asm_optimizing_spec) \ |
1139 | %(subtarget_asm_debugging_spec) \ | |
e21d5757 | 1140 | %{mabi=*} %{!mabi=*: %(asm_abi_default_spec)} \ |
ee692410 | 1141 | %{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \ |
6f428062 | 1142 | %{mfp32} %{mfp64} \ |
d9870b7e | 1143 | %{mshared} %{mno-shared} \ |
acda0e26 | 1144 | %{msym32} %{mno-sym32} \ |
78a14252 | 1145 | %{mtune=*} \ |
4e88bbcd | 1146 | %(subtarget_asm_spec)" |
e75b25e7 | 1147 | |
31c714e3 | 1148 | /* Extra switches sometimes passed to the linker. */ |
e75b25e7 MM |
1149 | |
1150 | #ifndef LINK_SPEC | |
31c714e3 | 1151 | #define LINK_SPEC "\ |
120dc6cd | 1152 | %(endian_spec) \ |
f2d6ca50 | 1153 | %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \ |
368e0b39 | 1154 | %{shared}" |
0e5a4ad8 EC |
1155 | #endif /* LINK_SPEC defined */ |
1156 | ||
e75b25e7 MM |
1157 | |
1158 | /* Specs for the compiler proper */ | |
1159 | ||
c9db96ce JR |
1160 | /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be |
1161 | overridden by subtargets. */ | |
1162 | #ifndef SUBTARGET_CC1_SPEC | |
1163 | #define SUBTARGET_CC1_SPEC "" | |
1164 | #endif | |
1165 | ||
1166 | /* CC1_SPEC is the set of arguments to pass to the compiler proper. */ | |
1167 | ||
120311ec | 1168 | #undef CC1_SPEC |
31c714e3 | 1169 | #define CC1_SPEC "\ |
96abdcb1 | 1170 | %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \ |
4e314d1f | 1171 | %(subtarget_cc1_spec)" |
e75b25e7 | 1172 | |
4e88bbcd ILT |
1173 | /* Preprocessor specs. */ |
1174 | ||
4e88bbcd ILT |
1175 | /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be |
1176 | overridden by subtargets. */ | |
1177 | #ifndef SUBTARGET_CPP_SPEC | |
1178 | #define SUBTARGET_CPP_SPEC "" | |
1179 | #endif | |
1180 | ||
ce3649d2 | 1181 | #define CPP_SPEC "%(subtarget_cpp_spec)" |
4e88bbcd ILT |
1182 | |
1183 | /* This macro defines names of additional specifications to put in the specs | |
1184 | that can be used in various specifications like CC1_SPEC. Its definition | |
1185 | is an initializer with a subgrouping for each command option. | |
1186 | ||
1187 | Each subgrouping contains a string constant, that defines the | |
7ec022b2 | 1188 | specification name, and a string constant that used by the GCC driver |
4e88bbcd ILT |
1189 | program. |
1190 | ||
1191 | Do not define this macro if it does not need to do anything. */ | |
1192 | ||
1193 | #define EXTRA_SPECS \ | |
829245be KG |
1194 | { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \ |
1195 | { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \ | |
829245be KG |
1196 | { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC }, \ |
1197 | { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \ | |
1198 | { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \ | |
5811cb27 | 1199 | { "asm_abi_default_spec", "-" MULTILIB_ABI_DEFAULT }, \ |
120dc6cd | 1200 | { "endian_spec", ENDIAN_SPEC }, \ |
4e88bbcd ILT |
1201 | SUBTARGET_EXTRA_SPECS |
1202 | ||
1203 | #ifndef SUBTARGET_EXTRA_SPECS | |
1204 | #define SUBTARGET_EXTRA_SPECS | |
e75b25e7 | 1205 | #endif |
e75b25e7 | 1206 | \f |
23532de9 | 1207 | #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */ |
deae8de6 EC |
1208 | #define DWARF2_DEBUGGING_INFO 1 /* dwarf2 debugging info */ |
1209 | ||
1210 | #ifndef PREFERRED_DEBUGGING_TYPE | |
1211 | #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG | |
1212 | #endif | |
e75b25e7 | 1213 | |
2e8a796f RS |
1214 | /* The size of DWARF addresses should be the same as the size of symbols |
1215 | in the target file format. They shouldn't depend on things like -msym32, | |
1216 | because many DWARF consumers do not allow the mixture of address sizes | |
1217 | that one would then get from linking -msym32 code with -msym64 code. | |
1218 | ||
1219 | Note that the default POINTER_SIZE test is not appropriate for MIPS. | |
1220 | EABI64 has 64-bit pointers but uses 32-bit ELF. */ | |
1221 | #define DWARF2_ADDR_SIZE (FILE_HAS_64BIT_SYMBOLS ? 8 : 4) | |
d2beeae7 | 1222 | |
59c94430 MM |
1223 | /* By default, turn on GDB extensions. */ |
1224 | #define DEFAULT_GDB_EXTENSIONS 1 | |
1225 | ||
6ae1498b JW |
1226 | /* Local compiler-generated symbols must have a prefix that the assembler |
1227 | understands. By default, this is $, although some targets (e.g., | |
987ba558 | 1228 | NetBSD-ELF) need to override this. */ |
6ae1498b JW |
1229 | |
1230 | #ifndef LOCAL_LABEL_PREFIX | |
1231 | #define LOCAL_LABEL_PREFIX "$" | |
1232 | #endif | |
1233 | ||
1234 | /* By default on the mips, external symbols do not have an underscore | |
987ba558 | 1235 | prepended, but some targets (e.g., NetBSD) require this. */ |
6ae1498b JW |
1236 | |
1237 | #ifndef USER_LABEL_PREFIX | |
1238 | #define USER_LABEL_PREFIX "" | |
1239 | #endif | |
1240 | ||
e75b25e7 MM |
1241 | /* On Sun 4, this limit is 2048. We use 1500 to be safe, |
1242 | since the length can run past this up to a continuation point. */ | |
44404b8b | 1243 | #undef DBX_CONTIN_LENGTH |
e75b25e7 MM |
1244 | #define DBX_CONTIN_LENGTH 1500 |
1245 | ||
987ba558 | 1246 | /* How to renumber registers for dbx and gdb. */ |
48156a39 | 1247 | #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[REGNO] |
e75b25e7 | 1248 | |
dfad12b5 | 1249 | /* The mapping from gcc register number to DWARF 2 CFA column number. */ |
48156a39 | 1250 | #define DWARF_FRAME_REGNUM(REGNO) mips_dwarf_regno[REGNO] |
c8cc5c4a JM |
1251 | |
1252 | /* The DWARF 2 CFA column which tracks the return address. */ | |
293593b1 | 1253 | #define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM |
1f3d0661 | 1254 | |
469ac993 | 1255 | /* Before the prologue, RA lives in r31. */ |
293593b1 | 1256 | #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM) |
469ac993 | 1257 | |
9e800206 | 1258 | /* Describe how we implement __builtin_eh_return. */ |
f1d5187e RS |
1259 | #define EH_RETURN_DATA_REGNO(N) \ |
1260 | ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM) | |
1261 | ||
9e800206 RH |
1262 | #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3) |
1263 | ||
0c433c31 RS |
1264 | #define EH_USES(N) mips_eh_uses (N) |
1265 | ||
7dac2f89 | 1266 | /* Offsets recorded in opcodes are a multiple of this alignment factor. |
b3276c7a GK |
1267 | The default for this in 64-bit mode is 8, which causes problems with |
1268 | SFmode register saves. */ | |
85bfab36 | 1269 | #define DWARF_CIE_DATA_ALIGNMENT -4 |
b3276c7a | 1270 | |
ab78d4a8 MM |
1271 | /* Correct the offset of automatic variables and arguments. Note that |
1272 | the MIPS debug format wants all automatic variables and arguments | |
1273 | to be in terms of the virtual frame pointer (stack pointer before | |
1274 | any adjustment in the function), while the MIPS 3.0 linker wants | |
1275 | the frame pointer to be the stack pointer after the initial | |
1276 | adjustment. */ | |
e75b25e7 | 1277 | |
8f2e3902 | 1278 | #define DEBUGGER_AUTO_OFFSET(X) \ |
f5963e61 | 1279 | mips_debugger_offset (X, (HOST_WIDE_INT) 0) |
8f2e3902 | 1280 | #define DEBUGGER_ARG_OFFSET(OFFSET, X) \ |
f5963e61 | 1281 | mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET) |
e75b25e7 MM |
1282 | \f |
1283 | /* Target machine storage layout */ | |
1284 | ||
4851a75c | 1285 | #define BITS_BIG_ENDIAN 0 |
96abdcb1 | 1286 | #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0) |
96abdcb1 | 1287 | #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0) |
e75b25e7 | 1288 | |
876c09d3 | 1289 | #define MAX_BITS_PER_WORD 64 |
e75b25e7 MM |
1290 | |
1291 | /* Width of a word, in units (bytes). */ | |
456f6501 | 1292 | #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4) |
3b831805 | 1293 | #ifndef IN_LIBGCC2 |
ef0e53ce | 1294 | #define MIN_UNITS_PER_WORD 4 |
3b831805 | 1295 | #endif |
876c09d3 JW |
1296 | |
1297 | /* For MIPS, width of a floating point register. */ | |
456f6501 | 1298 | #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4) |
e75b25e7 | 1299 | |
e8ab09c1 SL |
1300 | /* The number of consecutive floating-point registers needed to store the |
1301 | largest format supported by the FPU. */ | |
1302 | #define MAX_FPRS_PER_FMT (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2) | |
1303 | ||
1304 | /* The number of consecutive floating-point registers needed to store the | |
1305 | smallest format supported by the FPU. */ | |
1306 | #define MIN_FPRS_PER_FMT \ | |
f2d6ca50 AN |
1307 | (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2 \ |
1308 | ? 1 : MAX_FPRS_PER_FMT) | |
3f26edaa | 1309 | |
8a381273 AO |
1310 | /* The largest size of value that can be held in floating-point |
1311 | registers and moved with a single instruction. */ | |
e8ab09c1 | 1312 | #define UNITS_PER_HWFPVALUE \ |
a38e0142 | 1313 | (TARGET_SOFT_FLOAT_ABI ? 0 : MAX_FPRS_PER_FMT * UNITS_PER_FPREG) |
8a381273 AO |
1314 | |
1315 | /* The largest size of value that can be held in floating-point | |
1316 | registers. */ | |
0e808055 | 1317 | #define UNITS_PER_FPVALUE \ |
a38e0142 | 1318 | (TARGET_SOFT_FLOAT_ABI ? 0 \ |
0e808055 RS |
1319 | : TARGET_SINGLE_FLOAT ? UNITS_PER_FPREG \ |
1320 | : LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT) | |
4d72536e RS |
1321 | |
1322 | /* The number of bytes in a double. */ | |
1323 | #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT) | |
3f26edaa | 1324 | |
dfad12b5 | 1325 | /* Set the sizes of the core types. */ |
e75b25e7 | 1326 | #define SHORT_TYPE_SIZE 16 |
fb8136b2 | 1327 | #define INT_TYPE_SIZE 32 |
456f6501 | 1328 | #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32) |
923d630e | 1329 | #define LONG_LONG_TYPE_SIZE 64 |
e75b25e7 | 1330 | |
dfad12b5 | 1331 | #define FLOAT_TYPE_SIZE 32 |
e75b25e7 | 1332 | #define DOUBLE_TYPE_SIZE 64 |
7f9be256 | 1333 | #define LONG_DOUBLE_TYPE_SIZE (TARGET_NEWABI ? 128 : 64) |
8a381273 | 1334 | |
9fc777ad CF |
1335 | /* Define the sizes of fixed-point types. */ |
1336 | #define SHORT_FRACT_TYPE_SIZE 8 | |
1337 | #define FRACT_TYPE_SIZE 16 | |
1338 | #define LONG_FRACT_TYPE_SIZE 32 | |
1339 | #define LONG_LONG_FRACT_TYPE_SIZE 64 | |
1340 | ||
1341 | #define SHORT_ACCUM_TYPE_SIZE 16 | |
1342 | #define ACCUM_TYPE_SIZE 32 | |
1343 | #define LONG_ACCUM_TYPE_SIZE 64 | |
1344 | /* FIXME. LONG_LONG_ACCUM_TYPE_SIZE should be 128 bits, but GCC | |
1345 | doesn't support 128-bit integers for MIPS32 currently. */ | |
1346 | #define LONG_LONG_ACCUM_TYPE_SIZE (TARGET_64BIT ? 128 : 64) | |
1347 | ||
8a381273 AO |
1348 | /* long double is not a fixed mode, but the idea is that, if we |
1349 | support long double, we also want a 128-bit integer type. */ | |
1350 | #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE | |
1351 | ||
1352 | #ifdef IN_LIBGCC2 | |
1353 | #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \ | |
1354 | || (defined _ABI64 && _MIPS_SIM == _ABI64) | |
1355 | # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 | |
1356 | # else | |
1357 | # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 | |
1358 | # endif | |
1359 | #endif | |
e75b25e7 | 1360 | |
cafe096b | 1361 | /* Width in bits of a pointer. */ |
1eeed24e | 1362 | #ifndef POINTER_SIZE |
cafe096b | 1363 | #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32) |
1eeed24e | 1364 | #endif |
e75b25e7 | 1365 | |
e75b25e7 | 1366 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ |
e64ca6c4 | 1367 | #define PARM_BOUNDARY BITS_PER_WORD |
cafe096b | 1368 | |
e75b25e7 MM |
1369 | /* Allocation boundary (in *bits*) for the code of a function. */ |
1370 | #define FUNCTION_BOUNDARY 32 | |
1371 | ||
1372 | /* Alignment of field after `int : 0' in a structure. */ | |
9e95597a | 1373 | #define EMPTY_FIELD_BOUNDARY 32 |
e75b25e7 MM |
1374 | |
1375 | /* Every structure's size must be a multiple of this. */ | |
1376 | /* 8 is observed right on a DECstation and on riscos 4.02. */ | |
1377 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
1378 | ||
1379 | /* There is no point aligning anything to a rounder boundary than this. */ | |
8a381273 | 1380 | #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE |
e75b25e7 | 1381 | |
dfad12b5 | 1382 | /* All accesses must be aligned. */ |
31c714e3 | 1383 | #define STRICT_ALIGNMENT 1 |
e75b25e7 MM |
1384 | |
1385 | /* Define this if you wish to imitate the way many other C compilers | |
1386 | handle alignment of bitfields and the structures that contain | |
1387 | them. | |
1388 | ||
43a88a8c | 1389 | The behavior is that the type written for a bit-field (`int', |
e75b25e7 MM |
1390 | `short', or other integer type) imposes an alignment for the |
1391 | entire structure, as if the structure really did contain an | |
43a88a8c | 1392 | ordinary field of that type. In addition, the bit-field is placed |
e75b25e7 MM |
1393 | within the structure so that it would fit within such a field, |
1394 | not crossing a boundary for it. | |
1395 | ||
43a88a8c | 1396 | Thus, on most machines, a bit-field whose type is written as `int' |
e75b25e7 MM |
1397 | would not cross a four-byte boundary, and would force four-byte |
1398 | alignment for the whole structure. (The alignment used may not | |
1399 | be four bytes; it is controlled by the other alignment | |
1400 | parameters.) | |
1401 | ||
1402 | If the macro is defined, its definition should be a C expression; | |
1403 | a nonzero value for the expression enables this behavior. */ | |
1404 | ||
1405 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
1406 | ||
1407 | /* If defined, a C expression to compute the alignment given to a | |
1408 | constant that is being placed in memory. CONSTANT is the constant | |
1409 | and ALIGN is the alignment that the object would ordinarily have. | |
1410 | The value of this macro is used instead of that alignment to align | |
1411 | the object. | |
1412 | ||
1413 | If this macro is not defined, then ALIGN is used. | |
1414 | ||
1415 | The typical use of this macro is to increase alignment for string | |
1416 | constants to be word aligned so that `strcpy' calls that copy | |
1417 | constants can be done inline. */ | |
1418 | ||
1419 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ | |
1420 | ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \ | |
75131237 | 1421 | && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) |
e75b25e7 MM |
1422 | |
1423 | /* If defined, a C expression to compute the alignment for a static | |
1424 | variable. TYPE is the data type, and ALIGN is the alignment that | |
1425 | the object would ordinarily have. The value of this macro is used | |
1426 | instead of that alignment to align the object. | |
1427 | ||
1428 | If this macro is not defined, then ALIGN is used. | |
1429 | ||
1430 | One use of this macro is to increase alignment of medium-size | |
1431 | data to make it all fit in fewer cache lines. Another is to | |
1432 | cause character arrays to be word-aligned so that `strcpy' calls | |
1433 | that copy constants to character arrays can be done inline. */ | |
1434 | ||
1435 | #undef DATA_ALIGNMENT | |
1436 | #define DATA_ALIGNMENT(TYPE, ALIGN) \ | |
1437 | ((((ALIGN) < BITS_PER_WORD) \ | |
1438 | && (TREE_CODE (TYPE) == ARRAY_TYPE \ | |
1439 | || TREE_CODE (TYPE) == UNION_TYPE \ | |
1440 | || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) | |
1441 | ||
adb417d7 NS |
1442 | /* We need this for the same reason as DATA_ALIGNMENT, namely to cause |
1443 | character arrays to be word-aligned so that `strcpy' calls that copy | |
1444 | constants to character arrays can be done inline, and 'strcmp' can be | |
1445 | optimised to use word loads. */ | |
1446 | #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ | |
1447 | DATA_ALIGNMENT (TYPE, ALIGN) | |
1448 | ||
648bb159 RS |
1449 | #define PAD_VARARGS_DOWN \ |
1450 | (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward) | |
f5c8ac96 | 1451 | |
9a63901f RK |
1452 | /* Define if operations between registers always perform the operation |
1453 | on the full register even if a narrower mode is specified. */ | |
1454 | #define WORD_REGISTER_OPERATIONS | |
1455 | ||
85f65093 | 1456 | /* When in 64-bit mode, move insns will sign extend SImode and CCmode |
dab66575 | 1457 | moves. All other references are zero extended. */ |
a872728c JL |
1458 | #define LOAD_EXTEND_OP(MODE) \ |
1459 | (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \ | |
1460 | ? SIGN_EXTEND : ZERO_EXTEND) | |
2bcb2ab3 GK |
1461 | |
1462 | /* Define this macro if it is advisable to hold scalars in registers | |
7dac2f89 | 1463 | in a wider mode than that declared by the program. In such cases, |
2bcb2ab3 GK |
1464 | the value is constrained to be within the bounds of the declared |
1465 | type, but kept valid in the wider mode. The signedness of the | |
cafe096b | 1466 | extension may differ from that of the type. */ |
2bcb2ab3 GK |
1467 | |
1468 | #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ | |
1469 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
cafe096b EC |
1470 | && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ |
1471 | { \ | |
1472 | if ((MODE) == SImode) \ | |
1473 | (UNSIGNEDP) = 0; \ | |
1474 | (MODE) = Pmode; \ | |
1475 | } | |
1476 | ||
0dc31782 RS |
1477 | /* Pmode is always the same as ptr_mode, but not always the same as word_mode. |
1478 | Extensions of pointers to word_mode must be signed. */ | |
1479 | #define POINTERS_EXTEND_UNSIGNED false | |
1480 | ||
cafe096b EC |
1481 | /* Define if loading short immediate values into registers sign extends. */ |
1482 | #define SHORT_IMMEDIATES_SIGN_EXTEND | |
09d8cc0e ILT |
1483 | |
1484 | /* The [d]clz instructions have the natural values at 0. */ | |
1485 | ||
1486 | #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \ | |
14670a74 | 1487 | ((VALUE) = GET_MODE_BITSIZE (MODE), 2) |
e75b25e7 MM |
1488 | \f |
1489 | /* Standard register usage. */ | |
1490 | ||
dfad12b5 | 1491 | /* Number of hardware registers. We have: |
e75b25e7 | 1492 | |
dfad12b5 RS |
1493 | - 32 integer registers |
1494 | - 32 floating point registers | |
1495 | - 8 condition code registers | |
1496 | - 2 accumulator registers (hi and lo) | |
1497 | - 32 registers each for coprocessors 0, 2 and 3 | |
0c433c31 | 1498 | - 4 fake registers: |
bcbc6b7f RS |
1499 | - ARG_POINTER_REGNUM |
1500 | - FRAME_POINTER_REGNUM | |
dbc90b65 | 1501 | - GOT_VERSION_REGNUM (see the comment above load_call<mode> for details) |
0c433c31 RS |
1502 | - CPRESTORE_SLOT_REGNUM |
1503 | - 2 dummy entries that were used at various times in the past. | |
118ea793 CF |
1504 | - 6 DSP accumulator registers (3 hi-lo pairs) for MIPS DSP ASE |
1505 | - 6 DSP control registers */ | |
e75b25e7 | 1506 | |
118ea793 | 1507 | #define FIRST_PSEUDO_REGISTER 188 |
e75b25e7 | 1508 | |
dfad12b5 RS |
1509 | /* By default, fix the kernel registers ($26 and $27), the global |
1510 | pointer ($28) and the stack pointer ($29). This can change | |
1511 | depending on the command-line options. | |
e75b25e7 | 1512 | |
dfad12b5 | 1513 | Regarding coprocessor registers: without evidence to the contrary, |
d604bca3 | 1514 | it's best to assume that each coprocessor register has a unique |
525c561d | 1515 | use. This can be overridden, in, e.g., mips_option_override or |
5efd84c5 NF |
1516 | TARGET_CONDITIONAL_REGISTER_USAGE should the assumption be |
1517 | inappropriate for a particular target. */ | |
d604bca3 | 1518 | |
e75b25e7 MM |
1519 | #define FIXED_REGISTERS \ |
1520 | { \ | |
1521 | 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
cafe096b | 1522 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \ |
e75b25e7 MM |
1523 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ |
1524 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
d334c3c1 | 1525 | 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \ |
d604bca3 MH |
1526 | /* COP0 registers */ \ |
1527 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1528 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1529 | /* COP2 registers */ \ | |
1530 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1531 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1532 | /* COP3 registers */ \ | |
1533 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
118ea793 CF |
1534 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
1535 | /* 6 DSP accumulator registers & 6 control registers */ \ | |
1536 | 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 \ | |
e75b25e7 MM |
1537 | } |
1538 | ||
1539 | ||
dfad12b5 RS |
1540 | /* Set up this array for o32 by default. |
1541 | ||
1542 | Note that we don't mark $31 as a call-clobbered register. The idea is | |
1543 | that it's really the call instructions themselves which clobber $31. | |
cafe096b EC |
1544 | We don't care what the called function does with it afterwards. |
1545 | ||
1546 | This approach makes it easier to implement sibcalls. Unlike normal | |
1547 | calls, sibcalls don't clobber $31, so the register reaches the | |
1548 | called function in tact. EPILOGUE_USES says that $31 is useful | |
1549 | to the called function. */ | |
e75b25e7 MM |
1550 | |
1551 | #define CALL_USED_REGISTERS \ | |
1552 | { \ | |
1553 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
cafe096b | 1554 | 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \ |
e75b25e7 MM |
1555 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
1556 | 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
cafe096b | 1557 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
d604bca3 MH |
1558 | /* COP0 registers */ \ |
1559 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1560 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1561 | /* COP2 registers */ \ | |
1562 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1563 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1564 | /* COP3 registers */ \ | |
1565 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
118ea793 CF |
1566 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ |
1567 | /* 6 DSP accumulator registers & 6 control registers */ \ | |
1568 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \ | |
e75b25e7 MM |
1569 | } |
1570 | ||
2ca2d9ee | 1571 | |
dfad12b5 | 1572 | /* Define this since $28, though fixed, is call-saved in many ABIs. */ |
2ca2d9ee EC |
1573 | |
1574 | #define CALL_REALLY_USED_REGISTERS \ | |
1575 | { /* General registers. */ \ | |
1576 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
cafe096b | 1577 | 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \ |
2ca2d9ee EC |
1578 | /* Floating-point registers. */ \ |
1579 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ | |
1580 | 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
1581 | /* Others. */ \ | |
dbc90b65 | 1582 | 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, \ |
d604bca3 MH |
1583 | /* COP0 registers */ \ |
1584 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
1585 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
1586 | /* COP2 registers */ \ | |
1587 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
1588 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
1589 | /* COP3 registers */ \ | |
1590 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ | |
118ea793 CF |
1591 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ |
1592 | /* 6 DSP accumulator registers & 6 control registers */ \ | |
1593 | 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 \ | |
2ca2d9ee | 1594 | } |
e75b25e7 MM |
1595 | |
1596 | /* Internal macros to classify a register number as to whether it's a | |
1597 | general purpose register, a floating point register, a | |
516a2dfd | 1598 | multiply/divide register, or a status register. */ |
e75b25e7 MM |
1599 | |
1600 | #define GP_REG_FIRST 0 | |
1601 | #define GP_REG_LAST 31 | |
1602 | #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1) | |
1603 | #define GP_DBX_FIRST 0 | |
e19da24c CF |
1604 | #define K0_REG_NUM (GP_REG_FIRST + 26) |
1605 | #define K1_REG_NUM (GP_REG_FIRST + 27) | |
1606 | #define KERNEL_REG_P(REGNO) (IN_RANGE (REGNO, K0_REG_NUM, K1_REG_NUM)) | |
e75b25e7 MM |
1607 | |
1608 | #define FP_REG_FIRST 32 | |
1609 | #define FP_REG_LAST 63 | |
1610 | #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1) | |
1611 | #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32) | |
1612 | ||
1613 | #define MD_REG_FIRST 64 | |
d334c3c1 | 1614 | #define MD_REG_LAST 65 |
e75b25e7 | 1615 | #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1) |
77d4f3a4 | 1616 | #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM) |
e75b25e7 | 1617 | |
aa3e18a0 DD |
1618 | /* The DWARF 2 CFA column which tracks the return address from a |
1619 | signal handler context. This means that to maintain backwards | |
1620 | compatibility, no hard register can be assigned this column if it | |
1621 | would need to be handled by the DWARF unwinder. */ | |
1622 | #define DWARF_ALT_FRAME_RETURN_COLUMN 66 | |
1623 | ||
225b8835 | 1624 | #define ST_REG_FIRST 67 |
b8eb88d0 | 1625 | #define ST_REG_LAST 74 |
e75b25e7 MM |
1626 | #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1) |
1627 | ||
39dffea3 | 1628 | |
cafe096b | 1629 | /* FIXME: renumber. */ |
d604bca3 MH |
1630 | #define COP0_REG_FIRST 80 |
1631 | #define COP0_REG_LAST 111 | |
1632 | #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1) | |
1633 | ||
e19da24c CF |
1634 | #define COP0_STATUS_REG_NUM (COP0_REG_FIRST + 12) |
1635 | #define COP0_CAUSE_REG_NUM (COP0_REG_FIRST + 13) | |
1636 | #define COP0_EPC_REG_NUM (COP0_REG_FIRST + 14) | |
1637 | ||
d604bca3 MH |
1638 | #define COP2_REG_FIRST 112 |
1639 | #define COP2_REG_LAST 143 | |
1640 | #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1) | |
1641 | ||
1642 | #define COP3_REG_FIRST 144 | |
1643 | #define COP3_REG_LAST 175 | |
1644 | #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1) | |
1645 | /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */ | |
1646 | #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1) | |
1647 | ||
118ea793 CF |
1648 | #define DSP_ACC_REG_FIRST 176 |
1649 | #define DSP_ACC_REG_LAST 181 | |
1650 | #define DSP_ACC_REG_NUM (DSP_ACC_REG_LAST - DSP_ACC_REG_FIRST + 1) | |
1651 | ||
e75b25e7 | 1652 | #define AT_REGNUM (GP_REG_FIRST + 1) |
48156a39 NS |
1653 | #define HI_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST : MD_REG_FIRST + 1) |
1654 | #define LO_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST + 1 : MD_REG_FIRST) | |
b8eb88d0 | 1655 | |
e19da24c CF |
1656 | /* A few bitfield locations for the coprocessor registers. */ |
1657 | /* Request Interrupt Priority Level is from bit 10 to bit 15 of | |
1658 | the cause register for the EIC interrupt mode. */ | |
1659 | #define CAUSE_IPL 10 | |
1660 | /* Interrupt Priority Level is from bit 10 to bit 15 of the status register. */ | |
1661 | #define SR_IPL 10 | |
1662 | /* Exception Level is at bit 1 of the status register. */ | |
1663 | #define SR_EXL 1 | |
1664 | /* Interrupt Enable is at bit 0 of the status register. */ | |
1665 | #define SR_IE 0 | |
1666 | ||
dfad12b5 RS |
1667 | /* FPSW_REGNUM is the single condition code used if !ISA_HAS_8CC. |
1668 | If ISA_HAS_8CC, it should not be used, and an arbitrary ST_REG | |
b8eb88d0 | 1669 | should be used instead. */ |
e75b25e7 MM |
1670 | #define FPSW_REGNUM ST_REG_FIRST |
1671 | ||
75131237 RK |
1672 | #define GP_REG_P(REGNO) \ |
1673 | ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM) | |
2bcb2ab3 GK |
1674 | #define M16_REG_P(REGNO) \ |
1675 | (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17) | |
75131237 RK |
1676 | #define FP_REG_P(REGNO) \ |
1677 | ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM) | |
1678 | #define MD_REG_P(REGNO) \ | |
1679 | ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM) | |
1680 | #define ST_REG_P(REGNO) \ | |
1681 | ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM) | |
d604bca3 MH |
1682 | #define COP0_REG_P(REGNO) \ |
1683 | ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM) | |
1684 | #define COP2_REG_P(REGNO) \ | |
1685 | ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM) | |
1686 | #define COP3_REG_P(REGNO) \ | |
1687 | ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM) | |
1688 | #define ALL_COP_REG_P(REGNO) \ | |
1689 | ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM) | |
118ea793 CF |
1690 | /* Test if REGNO is one of the 6 new DSP accumulators. */ |
1691 | #define DSP_ACC_REG_P(REGNO) \ | |
1692 | ((unsigned int) ((int) (REGNO) - DSP_ACC_REG_FIRST) < DSP_ACC_REG_NUM) | |
1693 | /* Test if REGNO is hi, lo, or one of the 6 new DSP accumulators. */ | |
1694 | #define ACC_REG_P(REGNO) \ | |
1695 | (MD_REG_P (REGNO) || DSP_ACC_REG_P (REGNO)) | |
d604bca3 | 1696 | |
66083422 | 1697 | #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X))) |
5b0f0db6 | 1698 | |
96a30b18 RS |
1699 | /* True if X is (const (unspec [(const_int 0)] UNSPEC_GP)). This is used |
1700 | to initialize the mips16 gp pseudo register. */ | |
1701 | #define CONST_GP_P(X) \ | |
1702 | (GET_CODE (X) == CONST \ | |
1703 | && GET_CODE (XEXP (X, 0)) == UNSPEC \ | |
1704 | && XINT (XEXP (X, 0), 1) == UNSPEC_GP) | |
1705 | ||
d604bca3 MH |
1706 | /* Return coprocessor number from register number. */ |
1707 | ||
1708 | #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \ | |
1709 | (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \ | |
1710 | : COP3_REG_P (REGNO) ? '3' : '?') | |
e75b25e7 | 1711 | |
e75b25e7 | 1712 | |
0e5a4ad8 | 1713 | #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE) |
e75b25e7 | 1714 | |
e75b25e7 MM |
1715 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
1716 | mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ] | |
1717 | ||
e5a2b69d | 1718 | #define MODES_TIEABLE_P mips_modes_tieable_p |
e75b25e7 | 1719 | |
e75b25e7 | 1720 | /* Register to use for pushing function arguments. */ |
0fb5ac6f | 1721 | #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29) |
e75b25e7 | 1722 | |
bcbc6b7f RS |
1723 | /* These two registers don't really exist: they get eliminated to either |
1724 | the stack or hard frame pointer. */ | |
1725 | #define ARG_POINTER_REGNUM 77 | |
1726 | #define FRAME_POINTER_REGNUM 78 | |
2bcb2ab3 GK |
1727 | |
1728 | /* $30 is not available on the mips16, so we use $17 as the frame | |
1729 | pointer. */ | |
1730 | #define HARD_FRAME_POINTER_REGNUM \ | |
1731 | (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30) | |
e75b25e7 | 1732 | |
e3339d0f JM |
1733 | #define HARD_FRAME_POINTER_IS_FRAME_POINTER 0 |
1734 | #define HARD_FRAME_POINTER_IS_ARG_POINTER 0 | |
1735 | ||
e75b25e7 | 1736 | /* Register in which static-chain is passed to a function. */ |
e538e028 | 1737 | #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 15) |
e75b25e7 | 1738 | |
08d0963a | 1739 | /* Registers used as temporaries in prologue/epilogue code: |
be763023 | 1740 | |
08d0963a RS |
1741 | - If a MIPS16 PIC function needs access to _gp, it first loads |
1742 | the value into MIPS16_PIC_TEMP and then copies it to $gp. | |
1743 | ||
1744 | - The prologue can use MIPS_PROLOGUE_TEMP as a general temporary | |
1745 | register. The register must not conflict with MIPS16_PIC_TEMP. | |
1746 | ||
1747 | - The epilogue can use MIPS_EPILOGUE_TEMP as a general temporary | |
1748 | register. | |
1749 | ||
1750 | If we're generating MIPS16 code, these registers must come from the | |
1751 | core set of 8. The prologue registers mustn't conflict with any | |
1752 | incoming arguments, the static chain pointer, or the frame pointer. | |
1753 | The epilogue temporary mustn't conflict with the return registers, | |
1754 | the PIC call register ($25), the frame pointer, the EH stack adjustment, | |
e19da24c CF |
1755 | or the EH data registers. |
1756 | ||
1757 | If we're generating interrupt handlers, we use K0 as a temporary register | |
1758 | in prologue/epilogue code. */ | |
08d0963a RS |
1759 | |
1760 | #define MIPS16_PIC_TEMP_REGNUM (GP_REG_FIRST + 2) | |
e19da24c CF |
1761 | #define MIPS_PROLOGUE_TEMP_REGNUM \ |
1762 | (cfun->machine->interrupt_handler_p ? K0_REG_NUM : GP_REG_FIRST + 3) | |
1763 | #define MIPS_EPILOGUE_TEMP_REGNUM \ | |
1764 | (cfun->machine->interrupt_handler_p \ | |
1765 | ? K0_REG_NUM \ | |
1766 | : GP_REG_FIRST + (TARGET_MIPS16 ? 6 : 8)) | |
be763023 | 1767 | |
08d0963a | 1768 | #define MIPS16_PIC_TEMP gen_rtx_REG (Pmode, MIPS16_PIC_TEMP_REGNUM) |
be763023 RS |
1769 | #define MIPS_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_PROLOGUE_TEMP_REGNUM) |
1770 | #define MIPS_EPILOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_EPILOGUE_TEMP_REGNUM) | |
e75b25e7 MM |
1771 | |
1772 | /* Define this macro if it is as good or better to call a constant | |
1773 | function address than to call an address kept in a register. */ | |
1774 | #define NO_FUNCTION_CSE 1 | |
1775 | ||
f833ffd4 RS |
1776 | /* The ABI-defined global pointer. Sometimes we use a different |
1777 | register in leaf functions: see PIC_OFFSET_TABLE_REGNUM. */ | |
1778 | #define GLOBAL_POINTER_REGNUM (GP_REG_FIRST + 28) | |
1779 | ||
1780 | /* We normally use $28 as the global pointer. However, when generating | |
1781 | n32/64 PIC, it is better for leaf functions to use a call-clobbered | |
1782 | register instead. They can then avoid saving and restoring $28 | |
1783 | and perhaps avoid using a frame at all. | |
1784 | ||
1785 | When a leaf function uses something other than $28, mips_expand_prologue | |
1786 | will modify pic_offset_table_rtx in place. Take the register number | |
1787 | from there after reload. */ | |
1788 | #define PIC_OFFSET_TABLE_REGNUM \ | |
1789 | (reload_completed ? REGNO (pic_offset_table_rtx) : GLOBAL_POINTER_REGNUM) | |
e75b25e7 | 1790 | |
24e214e3 | 1791 | #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25) |
e75b25e7 MM |
1792 | \f |
1793 | /* Define the classes of registers for register constraints in the | |
1794 | machine description. Also define ranges of constants. | |
1795 | ||
1796 | One of the classes must always be named ALL_REGS and include all hard regs. | |
1797 | If there is more than one class, another class must be named NO_REGS | |
1798 | and contain no registers. | |
1799 | ||
1800 | The name GENERAL_REGS must be the name of a class (or an alias for | |
1801 | another name such as ALL_REGS). This is the class of registers | |
1802 | that is allowed by "g" or "r" in a register constraint. | |
1803 | Also, registers outside this class are allocated only when | |
1804 | instructions express preferences for them. | |
1805 | ||
1806 | The classes must be numbered in nondecreasing order; that is, | |
1807 | a larger-numbered class must never be contained completely | |
1808 | in a smaller-numbered class. | |
1809 | ||
1810 | For any two classes, it is very desirable that there be another | |
1811 | class that represents their union. */ | |
1812 | ||
1813 | enum reg_class | |
1814 | { | |
1815 | NO_REGS, /* no registers in set */ | |
2bcb2ab3 GK |
1816 | M16_REGS, /* mips16 directly accessible registers */ |
1817 | T_REG, /* mips16 T register ($24) */ | |
1818 | M16_T_REGS, /* mips16 registers plus T register */ | |
cafe096b | 1819 | PIC_FN_ADDR_REG, /* SVR4 PIC function address register */ |
2feaae20 | 1820 | V1_REG, /* Register $v1 ($3) used for TLS access. */ |
cafe096b | 1821 | LEA_REGS, /* Every GPR except $25 */ |
e75b25e7 MM |
1822 | GR_REGS, /* integer registers */ |
1823 | FP_REGS, /* floating point registers */ | |
48156a39 NS |
1824 | MD0_REG, /* first multiply/divide register */ |
1825 | MD1_REG, /* second multiply/divide register */ | |
e75b25e7 | 1826 | MD_REGS, /* multiply/divide registers (hi/lo) */ |
d604bca3 MH |
1827 | COP0_REGS, /* generic coprocessor classes */ |
1828 | COP2_REGS, | |
1829 | COP3_REGS, | |
e75b25e7 | 1830 | ST_REGS, /* status registers (fp status) */ |
118ea793 CF |
1831 | DSP_ACC_REGS, /* DSP accumulator registers */ |
1832 | ACC_REGS, /* Hi/Lo and DSP accumulator registers */ | |
7314c7dd | 1833 | FRAME_REGS, /* $arg and $frame */ |
5c0a2e3a RS |
1834 | GR_AND_MD0_REGS, /* union classes */ |
1835 | GR_AND_MD1_REGS, | |
1836 | GR_AND_MD_REGS, | |
1837 | GR_AND_ACC_REGS, | |
e75b25e7 MM |
1838 | ALL_REGS, /* all registers */ |
1839 | LIM_REG_CLASSES /* max value + 1 */ | |
1840 | }; | |
1841 | ||
1842 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
1843 | ||
1844 | #define GENERAL_REGS GR_REGS | |
1845 | ||
1846 | /* An initializer containing the names of the register classes as C | |
1847 | string constants. These names are used in writing some of the | |
1848 | debugging dumps. */ | |
1849 | ||
1850 | #define REG_CLASS_NAMES \ | |
1851 | { \ | |
1852 | "NO_REGS", \ | |
2bcb2ab3 GK |
1853 | "M16_REGS", \ |
1854 | "T_REG", \ | |
1855 | "M16_T_REGS", \ | |
cafe096b | 1856 | "PIC_FN_ADDR_REG", \ |
2feaae20 | 1857 | "V1_REG", \ |
cafe096b | 1858 | "LEA_REGS", \ |
e75b25e7 MM |
1859 | "GR_REGS", \ |
1860 | "FP_REGS", \ | |
48156a39 NS |
1861 | "MD0_REG", \ |
1862 | "MD1_REG", \ | |
e75b25e7 | 1863 | "MD_REGS", \ |
d604bca3 MH |
1864 | /* coprocessor registers */ \ |
1865 | "COP0_REGS", \ | |
1866 | "COP2_REGS", \ | |
1867 | "COP3_REGS", \ | |
e75b25e7 | 1868 | "ST_REGS", \ |
118ea793 CF |
1869 | "DSP_ACC_REGS", \ |
1870 | "ACC_REGS", \ | |
7314c7dd | 1871 | "FRAME_REGS", \ |
5c0a2e3a RS |
1872 | "GR_AND_MD0_REGS", \ |
1873 | "GR_AND_MD1_REGS", \ | |
1874 | "GR_AND_MD_REGS", \ | |
1875 | "GR_AND_ACC_REGS", \ | |
e75b25e7 MM |
1876 | "ALL_REGS" \ |
1877 | } | |
1878 | ||
1879 | /* An initializer containing the contents of the register classes, | |
1880 | as integers which are bit masks. The Nth integer specifies the | |
1881 | contents of class N. The way the integer MASK is interpreted is | |
1882 | that register R is in the class if `MASK & (1 << R)' is 1. | |
1883 | ||
1884 | When the machine has more than 32 registers, an integer does not | |
1885 | suffice. Then the integers are replaced by sub-initializers, | |
1886 | braced groupings containing several integers. Each | |
1887 | sub-initializer must be suitable as an initializer for the type | |
1888 | `HARD_REG_SET' which is defined in `hard-reg-set.h'. */ | |
1889 | ||
ec24a740 EC |
1890 | #define REG_CLASS_CONTENTS \ |
1891 | { \ | |
5c0a2e3a RS |
1892 | { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \ |
1893 | { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* M16_REGS */ \ | |
1894 | { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* T_REG */ \ | |
1895 | { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* M16_T_REGS */ \ | |
1896 | { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* PIC_FN_ADDR_REG */ \ | |
1897 | { 0x00000008, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* V1_REG */ \ | |
1898 | { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* LEA_REGS */ \ | |
1899 | { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* GR_REGS */ \ | |
1900 | { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* FP_REGS */ \ | |
1901 | { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* MD0_REG */ \ | |
1902 | { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* MD1_REG */ \ | |
1903 | { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* MD_REGS */ \ | |
1904 | { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* COP0_REGS */ \ | |
1905 | { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* COP2_REGS */ \ | |
1906 | { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* COP3_REGS */ \ | |
1907 | { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* ST_REGS */ \ | |
1908 | { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x003f0000 }, /* DSP_ACC_REGS */ \ | |
1909 | { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* ACC_REGS */ \ | |
1910 | { 0x00000000, 0x00000000, 0x00006000, 0x00000000, 0x00000000, 0x00000000 }, /* FRAME_REGS */ \ | |
1911 | { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD0_REGS */ \ | |
1912 | { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD1_REGS */ \ | |
1913 | { 0xffffffff, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD_REGS */ \ | |
1914 | { 0xffffffff, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* GR_AND_ACC_REGS */ \ | |
1915 | { 0xffffffff, 0xffffffff, 0xffff67ff, 0xffffffff, 0xffffffff, 0x0fffffff } /* ALL_REGS */ \ | |
e75b25e7 MM |
1916 | } |
1917 | ||
1918 | ||
1919 | /* A C expression whose value is a register class containing hard | |
1920 | register REGNO. In general there is more that one such class; | |
1921 | choose a class which is "minimal", meaning that no smaller class | |
1922 | also contains the register. */ | |
1923 | ||
e75b25e7 MM |
1924 | #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ] |
1925 | ||
1926 | /* A macro whose definition is the name of the class to which a | |
1927 | valid base register must belong. A base register is one used in | |
1928 | an address which is the register value plus a displacement. */ | |
1929 | ||
2bcb2ab3 | 1930 | #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS) |
e75b25e7 MM |
1931 | |
1932 | /* A macro whose definition is the name of the class to which a | |
1933 | valid index register must belong. An index register is one used | |
1934 | in an address where its value is either multiplied by a scale | |
1935 | factor or added to another register (as well as added to a | |
1936 | displacement). */ | |
1937 | ||
876c09d3 | 1938 | #define INDEX_REG_CLASS NO_REGS |
e75b25e7 | 1939 | |
59dbe1d9 RS |
1940 | /* We generally want to put call-clobbered registers ahead of |
1941 | call-saved ones. (IRA expects this.) */ | |
2bcb2ab3 GK |
1942 | |
1943 | #define REG_ALLOC_ORDER \ | |
e08be11c RS |
1944 | { /* Accumulator registers. When GPRs and accumulators have equal \ |
1945 | cost, we generally prefer to use accumulators. For example, \ | |
1946 | a division of multiplication result is better allocated to LO, \ | |
1947 | so that we put the MFLO at the point of use instead of at the \ | |
1948 | point of definition. It's also needed if we're to take advantage \ | |
1949 | of the extra accumulators available with -mdspr2. In some cases, \ | |
1950 | it can also help to reduce register pressure. */ \ | |
1951 | 64, 65,176,177,178,179,180,181, \ | |
1952 | /* Call-clobbered GPRs. */ \ | |
1953 | 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \ | |
59dbe1d9 RS |
1954 | 24, 25, 31, \ |
1955 | /* The global pointer. This is call-clobbered for o32 and o64 \ | |
1956 | abicalls, call-saved for n32 and n64 abicalls, and a program \ | |
1957 | invariant otherwise. Putting it between the call-clobbered \ | |
1958 | and call-saved registers should cope with all eventualities. */ \ | |
1959 | 28, \ | |
1960 | /* Call-saved GPRs. */ \ | |
1961 | 16, 17, 18, 19, 20, 21, 22, 23, 30, \ | |
1962 | /* GPRs that can never be exposed to the register allocator. */ \ | |
e08be11c | 1963 | 0, 26, 27, 29, \ |
59dbe1d9 | 1964 | /* Call-clobbered FPRs. */ \ |
2bcb2ab3 | 1965 | 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \ |
59dbe1d9 RS |
1966 | 48, 49, 50, 51, \ |
1967 | /* FPRs that are usually call-saved. The odd ones are actually \ | |
1968 | call-clobbered for n32, but listing them ahead of the even \ | |
1969 | registers might encourage the register allocator to fragment \ | |
1970 | the available FPR pairs. We need paired FPRs to store long \ | |
1971 | doubles, so it isn't clear that using a different order \ | |
1972 | for n32 would be a win. */ \ | |
1973 | 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \ | |
1974 | /* None of the remaining classes have defined call-saved \ | |
1975 | registers. */ \ | |
e08be11c | 1976 | 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \ |
d604bca3 MH |
1977 | 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \ |
1978 | 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \ | |
1979 | 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \ | |
1980 | 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \ | |
1981 | 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \ | |
118ea793 | 1982 | 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, \ |
e08be11c | 1983 | 182,183,184,185,186,187 \ |
2bcb2ab3 GK |
1984 | } |
1985 | ||
5a733826 | 1986 | /* ADJUST_REG_ALLOC_ORDER is a macro which permits reg_alloc_order |
2bcb2ab3 GK |
1987 | to be rearranged based on a particular function. On the mips16, we |
1988 | want to allocate $24 (T_REG) before other registers for | |
1989 | instructions for which it is possible. */ | |
1990 | ||
5a733826 | 1991 | #define ADJUST_REG_ALLOC_ORDER mips_order_regs_for_local_alloc () |
e75b25e7 | 1992 | |
569b7f6a | 1993 | /* True if VALUE is an unsigned 6-bit number. */ |
118ea793 CF |
1994 | |
1995 | #define UIMM6_OPERAND(VALUE) \ | |
1996 | (((VALUE) & ~(unsigned HOST_WIDE_INT) 0x3f) == 0) | |
1997 | ||
1998 | /* True if VALUE is a signed 10-bit number. */ | |
1999 | ||
2000 | #define IMM10_OPERAND(VALUE) \ | |
2001 | ((unsigned HOST_WIDE_INT) (VALUE) + 0x200 < 0x400) | |
2002 | ||
cafe096b EC |
2003 | /* True if VALUE is a signed 16-bit number. */ |
2004 | ||
2005 | #define SMALL_OPERAND(VALUE) \ | |
2006 | ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000) | |
2007 | ||
2008 | /* True if VALUE is an unsigned 16-bit number. */ | |
2009 | ||
2010 | #define SMALL_OPERAND_UNSIGNED(VALUE) \ | |
2011 | (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0) | |
2012 | ||
2013 | /* True if VALUE can be loaded into a register using LUI. */ | |
2014 | ||
2015 | #define LUI_OPERAND(VALUE) \ | |
2016 | (((VALUE) | 0x7fff0000) == 0x7fff0000 \ | |
2017 | || ((VALUE) | 0x7fff0000) + 0x10000 == 0) | |
2018 | ||
2019 | /* Return a value X with the low 16 bits clear, and such that | |
2020 | VALUE - X is a signed 16-bit value. */ | |
2021 | ||
2022 | #define CONST_HIGH_PART(VALUE) \ | |
2023 | (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff) | |
2024 | ||
2025 | #define CONST_LOW_PART(VALUE) \ | |
2026 | ((VALUE) - CONST_HIGH_PART (VALUE)) | |
2027 | ||
2028 | #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X)) | |
2029 | #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X)) | |
2030 | #define LUI_INT(X) LUI_OPERAND (INTVAL (X)) | |
2031 | ||
46299de9 | 2032 | /* The HI and LO registers can only be reloaded via the general |
b8eb88d0 ILT |
2033 | registers. Condition code registers can only be loaded to the |
2034 | general registers, and from the floating point registers. */ | |
46299de9 | 2035 | |
225b8835 | 2036 | #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
65239d20 | 2037 | mips_secondary_reload_class (CLASS, MODE, X, true) |
225b8835 | 2038 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ |
65239d20 | 2039 | mips_secondary_reload_class (CLASS, MODE, X, false) |
46299de9 | 2040 | |
e75b25e7 MM |
2041 | /* Return the maximum number of consecutive registers |
2042 | needed to represent mode MODE in a register of class CLASS. */ | |
2043 | ||
d604bca3 | 2044 | #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE) |
e75b25e7 | 2045 | |
b0c42aed JH |
2046 | #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \ |
2047 | mips_cannot_change_mode_class (FROM, TO, CLASS) | |
e75b25e7 MM |
2048 | \f |
2049 | /* Stack layout; function entry, exit and calling. */ | |
2050 | ||
e75b25e7 MM |
2051 | #define STACK_GROWS_DOWNWARD |
2052 | ||
ba6adec4 | 2053 | #define FRAME_GROWS_DOWNWARD flag_stack_protect |
b5411fea | 2054 | |
ba6adec4 AN |
2055 | /* Size of the area allocated in the frame to save the GP. */ |
2056 | ||
2057 | #define MIPS_GP_SAVE_AREA_SIZE \ | |
2058 | (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0) | |
2059 | ||
2060 | /* The offset of the first local variable from the frame pointer. See | |
2061 | mips_compute_frame_info for details about the frame layout. */ | |
2062 | ||
2063 | #define STARTING_FRAME_OFFSET \ | |
2064 | (FRAME_GROWS_DOWNWARD \ | |
2065 | ? 0 \ | |
2066 | : crtl->outgoing_args_size + MIPS_GP_SAVE_AREA_SIZE) | |
ab78d4a8 | 2067 | |
cafe096b | 2068 | #define RETURN_ADDR_RTX mips_return_addr |
39dffea3 | 2069 | |
57972505 RS |
2070 | /* Mask off the MIPS16 ISA bit in unwind addresses. |
2071 | ||
2072 | The reason for this is a little subtle. When unwinding a call, | |
2073 | we are given the call's return address, which on most targets | |
2074 | is the address of the following instruction. However, what we | |
2075 | actually want to find is the EH region for the call itself. | |
2076 | The target-independent unwind code therefore searches for "RA - 1". | |
2077 | ||
2078 | In the MIPS16 case, RA is always an odd-valued (ISA-encoded) address. | |
2079 | RA - 1 is therefore the real (even-valued) start of the return | |
2080 | instruction. EH region labels are usually odd-valued MIPS16 symbols | |
2081 | too, so a search for an even address within a MIPS16 region would | |
2082 | usually work. | |
2083 | ||
2084 | However, there is an exception. If the end of an EH region is also | |
2085 | the end of a function, the end label is allowed to be even. This is | |
2086 | necessary because a following non-MIPS16 function may also need EH | |
2087 | information for its first instruction. | |
2088 | ||
2089 | Thus a MIPS16 region may be terminated by an ISA-encoded or a | |
2090 | non-ISA-encoded address. This probably isn't ideal, but it is | |
2091 | the traditional (legacy) behavior. It is therefore only safe | |
2092 | to search MIPS EH regions for an _odd-valued_ address. | |
2093 | ||
2094 | Masking off the ISA bit means that the target-independent code | |
2095 | will search for "(RA & -2) - 1", which is guaranteed to be odd. */ | |
7f48c9e1 AO |
2096 | #define MASK_RETURN_ADDR GEN_INT (-2) |
2097 | ||
cafe096b | 2098 | |
7f48c9e1 AO |
2099 | /* Similarly, don't use the least-significant bit to tell pointers to |
2100 | code from vtable index. */ | |
2101 | ||
2102 | #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta | |
2103 | ||
dfad12b5 | 2104 | /* The eliminations to $17 are only used for mips16 code. See the |
2bcb2ab3 | 2105 | definition of HARD_FRAME_POINTER_REGNUM. */ |
ab78d4a8 MM |
2106 | |
2107 | #define ELIMINABLE_REGS \ | |
2108 | {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
2bcb2ab3 GK |
2109 | { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \ |
2110 | { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \ | |
2bcb2ab3 GK |
2111 | { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
2112 | { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \ | |
2113 | { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}} | |
ab78d4a8 | 2114 | |
b2471838 | 2115 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
dfad12b5 | 2116 | (OFFSET) = mips_initial_elimination_offset ((FROM), (TO)) |
e75b25e7 | 2117 | |
dfad12b5 | 2118 | /* Allocate stack space for arguments at the beginning of each function. */ |
f73ad30e | 2119 | #define ACCUMULATE_OUTGOING_ARGS 1 |
e75b25e7 | 2120 | |
dfad12b5 | 2121 | /* The argument pointer always points to the first argument. */ |
305aa9e2 | 2122 | #define FIRST_PARM_OFFSET(FNDECL) 0 |
e75b25e7 | 2123 | |
dfad12b5 RS |
2124 | /* o32 and o64 reserve stack space for all argument registers. */ |
2125 | #define REG_PARM_STACK_SPACE(FNDECL) \ | |
7f9be256 | 2126 | (TARGET_OLDABI \ |
dfad12b5 | 2127 | ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) \ |
ac8ab9fe | 2128 | : 0) |
e75b25e7 MM |
2129 | |
2130 | /* Define this if it is the responsibility of the caller to | |
7dac2f89 | 2131 | allocate the area reserved for arguments passed in registers. |
e75b25e7 | 2132 | If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect |
7dac2f89 | 2133 | of this macro is to determine whether the space is included in |
38173d38 | 2134 | `crtl->outgoing_args_size'. */ |
81464b2c | 2135 | #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1 |
e75b25e7 | 2136 | |
e64ca6c4 | 2137 | #define STACK_BOUNDARY (TARGET_NEWABI ? 128 : 64) |
e75b25e7 | 2138 | \f |
e75b25e7 MM |
2139 | /* Symbolic macros for the registers used to return integer and floating |
2140 | point values. */ | |
2141 | ||
2142 | #define GP_RETURN (GP_REG_FIRST + 2) | |
2143 | #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0)) | |
2144 | ||
7f9be256 | 2145 | #define MAX_ARGS_IN_REGISTERS (TARGET_OLDABI ? 4 : 8) |
ac8ab9fe | 2146 | |
e75b25e7 MM |
2147 | /* Symbolic macros for the first/last argument registers. */ |
2148 | ||
2149 | #define GP_ARG_FIRST (GP_REG_FIRST + 4) | |
ac8ab9fe | 2150 | #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1) |
e75b25e7 | 2151 | #define FP_ARG_FIRST (FP_REG_FIRST + 12) |
ac8ab9fe | 2152 | #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1) |
e75b25e7 | 2153 | |
46af8e31 JW |
2154 | /* 1 if N is a possible register number for function argument passing. |
2155 | We have no FP argument registers when soft-float. When FP registers | |
2156 | are 32 bits, we can't directly reference the odd numbered ones. */ | |
2157 | ||
2158 | #define FUNCTION_ARG_REGNO_P(N) \ | |
8bf3ccbb | 2159 | ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \ |
ca87076c | 2160 | || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST))) \ |
8bf3ccbb | 2161 | && !fixed_regs[N]) |
e75b25e7 | 2162 | \f |
dfad12b5 | 2163 | /* This structure has to cope with two different argument allocation |
b11a9d5f RS |
2164 | schemes. Most MIPS ABIs view the arguments as a structure, of which |
2165 | the first N words go in registers and the rest go on the stack. If I | |
2166 | < N, the Ith word might go in Ith integer argument register or in a | |
2167 | floating-point register. For these ABIs, we only need to remember | |
2168 | the offset of the current argument into the structure. | |
4d72536e RS |
2169 | |
2170 | The EABI instead allocates the integer and floating-point arguments | |
2171 | separately. The first N words of FP arguments go in FP registers, | |
2172 | the rest go on the stack. Likewise, the first N words of the other | |
2173 | arguments go in integer registers, and the rest go on the stack. We | |
2174 | need to maintain three counts: the number of integer registers used, | |
2175 | the number of floating-point registers used, and the number of words | |
2176 | passed on the stack. | |
2177 | ||
2178 | We could keep separate information for the two ABIs (a word count for | |
2179 | the standard ABIs, and three separate counts for the EABI). But it | |
2180 | seems simpler to view the standard ABIs as forms of EABI that do not | |
2181 | allocate floating-point registers. | |
2182 | ||
2183 | So for the standard ABIs, the first N words are allocated to integer | |
65239d20 RS |
2184 | registers, and mips_function_arg decides on an argument-by-argument |
2185 | basis whether that argument should really go in an integer register, | |
2186 | or in a floating-point one. */ | |
e75b25e7 MM |
2187 | |
2188 | typedef struct mips_args { | |
4d72536e RS |
2189 | /* Always true for varargs functions. Otherwise true if at least |
2190 | one argument has been passed in an integer register. */ | |
2191 | int gp_reg_found; | |
2192 | ||
2193 | /* The number of arguments seen so far. */ | |
2194 | unsigned int arg_number; | |
2195 | ||
b11a9d5f RS |
2196 | /* The number of integer registers used so far. For all ABIs except |
2197 | EABI, this is the number of words that have been added to the | |
2198 | argument structure, limited to MAX_ARGS_IN_REGISTERS. */ | |
bb63e5a0 | 2199 | unsigned int num_gprs; |
4d72536e RS |
2200 | |
2201 | /* For EABI, the number of floating-point registers used so far. */ | |
bb63e5a0 | 2202 | unsigned int num_fprs; |
4d72536e RS |
2203 | |
2204 | /* The number of words passed on the stack. */ | |
2205 | unsigned int stack_words; | |
2206 | ||
2207 | /* On the mips16, we need to keep track of which floating point | |
2208 | arguments were passed in general registers, but would have been | |
85f65093 KH |
2209 | passed in the FP regs if this were a 32-bit function, so that we |
2210 | can move them to the FP regs if we wind up calling a 32-bit | |
4d72536e RS |
2211 | function. We record this information in fp_code, encoded in base |
2212 | four. A zero digit means no floating point argument, a one digit | |
2213 | means an SFmode argument, and a two digit means a DFmode argument, | |
2214 | and a three digit is not used. The low order digit is the first | |
2215 | argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by | |
2216 | an SFmode argument. ??? A more sophisticated approach will be | |
2217 | needed if MIPS_ABI != ABI_32. */ | |
2218 | int fp_code; | |
2219 | ||
2220 | /* True if the function has a prototype. */ | |
2221 | int prototype; | |
e75b25e7 MM |
2222 | } CUMULATIVE_ARGS; |
2223 | ||
2224 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
2225 | for a call to a function whose data type is FNTYPE. | |
ce6e2d90 | 2226 | For a library call, FNTYPE is 0. */ |
e75b25e7 | 2227 | |
0f6937fe | 2228 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ |
65239d20 | 2229 | mips_init_cumulative_args (&CUM, FNTYPE) |
e75b25e7 | 2230 | |
65239d20 | 2231 | #define FUNCTION_ARG_PADDING(MODE, TYPE) \ |
648bb159 RS |
2232 | (mips_pad_arg_upward (MODE, TYPE) ? upward : downward) |
2233 | ||
65239d20 | 2234 | #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ |
648bb159 | 2235 | (mips_pad_reg_upward (MODE, TYPE) ? upward : downward) |
ac8ab9fe | 2236 | |
4d72536e RS |
2237 | /* True if using EABI and varargs can be passed in floating-point |
2238 | registers. Under these conditions, we need a more complex form | |
2239 | of va_list, which tracks GPR, FPR and stack arguments separately. */ | |
2240 | #define EABI_FLOAT_VARARGS_P \ | |
2241 | (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE) | |
2242 | ||
e75b25e7 | 2243 | \f |
e19da24c | 2244 | #define EPILOGUE_USES(REGNO) mips_epilogue_uses (REGNO) |
cafe096b | 2245 | |
ac8ab9fe RS |
2246 | /* Treat LOC as a byte offset from the stack pointer and round it up |
2247 | to the next fully-aligned offset. */ | |
e64ca6c4 RS |
2248 | #define MIPS_STACK_ALIGN(LOC) \ |
2249 | (TARGET_NEWABI ? ((LOC) + 15) & -16 : ((LOC) + 7) & -8) | |
e75b25e7 MM |
2250 | |
2251 | \f | |
2252 | /* Output assembler code to FILE to increment profiler label # LABELNO | |
2253 | for profiling a function entry. */ | |
2254 | ||
c376dbfb | 2255 | #define FUNCTION_PROFILER(FILE, LABELNO) mips_function_profiler ((FILE)) |
e75b25e7 | 2256 | |
d9dced13 RS |
2257 | /* The profiler preserves all interesting registers, including $31. */ |
2258 | #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) false | |
2259 | ||
f50c57ba JW |
2260 | /* No mips port has ever used the profiler counter word, so don't emit it |
2261 | or the label for it. */ | |
2262 | ||
2263 | #define NO_PROFILE_COUNTERS 1 | |
2264 | ||
d8d5b1e1 MM |
2265 | /* Define this macro if the code for function profiling should come |
2266 | before the function prologue. Normally, the profiling code comes | |
2267 | after. */ | |
2268 | ||
2269 | /* #define PROFILE_BEFORE_PROLOGUE */ | |
2270 | ||
e75b25e7 MM |
2271 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
2272 | the stack pointer does not matter. The value is tested only in | |
2273 | functions that have frame pointers. | |
2274 | No definition is equivalent to always zero. */ | |
2275 | ||
2276 | #define EXIT_IGNORE_STACK 1 | |
2277 | ||
2278 | \f | |
c640a3bd | 2279 | /* Trampolines are a block of code followed by two pointers. */ |
e75b25e7 | 2280 | |
c640a3bd RS |
2281 | #define TRAMPOLINE_SIZE \ |
2282 | (mips_trampoline_code_size () + GET_MODE_SIZE (ptr_mode) * 2) | |
e75b25e7 | 2283 | |
c640a3bd RS |
2284 | /* Forcing a 64-bit alignment for 32-bit targets allows us to load two |
2285 | pointers from a single LUI base. */ | |
e75b25e7 | 2286 | |
c640a3bd | 2287 | #define TRAMPOLINE_ALIGNMENT 64 |
e75b25e7 | 2288 | |
a1d29c8c | 2289 | /* mips_trampoline_init calls this library function to flush |
c85f7c16 JL |
2290 | program and data caches. */ |
2291 | ||
2292 | #ifndef CACHE_FLUSH_FUNC | |
2293 | #define CACHE_FLUSH_FUNC "_flush_cache" | |
2294 | #endif | |
2295 | ||
d9dced13 RS |
2296 | #define MIPS_ICACHE_SYNC(ADDR, SIZE) \ |
2297 | /* Flush both caches. We need to flush the data cache in case \ | |
2298 | the system has a write-back cache. */ \ | |
2299 | emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \ | |
bbbbb16a | 2300 | LCT_NORMAL, VOIDmode, 3, ADDR, Pmode, SIZE, Pmode, \ |
d9dced13 RS |
2301 | GEN_INT (3), TYPE_MODE (integer_type_node)) |
2302 | ||
e75b25e7 MM |
2303 | \f |
2304 | /* Addressing modes, and classification of registers for them. */ | |
2305 | ||
bcbc6b7f RS |
2306 | #define REGNO_OK_FOR_INDEX_P(REGNO) 0 |
2307 | #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \ | |
2308 | mips_regno_mode_ok_for_base_p (REGNO, MODE, 1) | |
e75b25e7 MM |
2309 | \f |
2310 | /* Maximum number of registers that can appear in a valid memory address. */ | |
2311 | ||
2312 | #define MAX_REGS_PER_ADDRESS 1 | |
2313 | ||
cafe096b EC |
2314 | /* Check for constness inline but use mips_legitimate_address_p |
2315 | to check whether a constant really is an address. */ | |
2316 | ||
2317 | #define CONSTANT_ADDRESS_P(X) \ | |
c6c3dba9 | 2318 | (CONSTANT_P (X) && memory_address_p (SImode, X)) |
cafe096b | 2319 | |
9c9e7632 GK |
2320 | /* This handles the magic '..CURRENT_FUNCTION' symbol, which means |
2321 | 'the start of the function that this code is output in'. */ | |
2322 | ||
2323 | #define ASM_OUTPUT_LABELREF(FILE,NAME) \ | |
2324 | if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \ | |
2325 | asm_fprintf ((FILE), "%U%s", \ | |
2326 | XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ | |
2327 | else \ | |
2328 | asm_fprintf ((FILE), "%U%s", (NAME)) | |
e75b25e7 | 2329 | \f |
4dbdb061 JW |
2330 | /* Flag to mark a function decl symbol that requires a long call. */ |
2331 | #define SYMBOL_FLAG_LONG_CALL (SYMBOL_FLAG_MACH_DEP << 0) | |
2332 | #define SYMBOL_REF_LONG_CALL_P(X) \ | |
2333 | ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_LONG_CALL) != 0) | |
2334 | ||
08d0963a RS |
2335 | /* This flag marks functions that cannot be lazily bound. */ |
2336 | #define SYMBOL_FLAG_BIND_NOW (SYMBOL_FLAG_MACH_DEP << 1) | |
2337 | #define SYMBOL_REF_BIND_NOW_P(RTX) \ | |
2338 | ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_BIND_NOW) != 0) | |
2339 | ||
c93c5160 RS |
2340 | /* True if we're generating a form of MIPS16 code in which jump tables |
2341 | are stored in the text section and encoded as 16-bit PC-relative | |
2342 | offsets. This is only possible when general text loads are allowed, | |
2343 | since the table access itself will be an "lh" instruction. */ | |
2344 | /* ??? 16-bit offsets can overflow in large functions. */ | |
2345 | #define TARGET_MIPS16_SHORT_JUMP_TABLES TARGET_MIPS16_TEXT_LOADS | |
2bcb2ab3 | 2346 | |
c93c5160 RS |
2347 | #define JUMP_TABLES_IN_TEXT_SECTION TARGET_MIPS16_SHORT_JUMP_TABLES |
2348 | ||
2349 | #define CASE_VECTOR_MODE (TARGET_MIPS16_SHORT_JUMP_TABLES ? HImode : ptr_mode) | |
2350 | ||
2351 | #define CASE_VECTOR_PC_RELATIVE TARGET_MIPS16_SHORT_JUMP_TABLES | |
e75b25e7 | 2352 | |
e75b25e7 | 2353 | /* Define this as 1 if `char' should by default be signed; else as 0. */ |
6639753e | 2354 | #ifndef DEFAULT_SIGNED_CHAR |
e75b25e7 | 2355 | #define DEFAULT_SIGNED_CHAR 1 |
6639753e | 2356 | #endif |
e75b25e7 | 2357 | |
a1c6b246 RS |
2358 | /* Although LDC1 and SDC1 provide 64-bit moves on 32-bit targets, |
2359 | we generally don't want to use them for copying arbitrary data. | |
2360 | A single N-word move is usually the same cost as N single-word moves. */ | |
2361 | #define MOVE_MAX UNITS_PER_WORD | |
876c09d3 | 2362 | #define MAX_MOVE_MAX 8 |
e75b25e7 MM |
2363 | |
2364 | /* Define this macro as a C expression which is nonzero if | |
2365 | accessing less than a word of memory (i.e. a `char' or a | |
2366 | `short') is no faster than accessing a word of memory, i.e., if | |
2367 | such access require more than one instruction or if there is no | |
2368 | difference in cost between byte and (aligned) word loads. | |
2369 | ||
2370 | On RISC machines, it tends to generate better code to define | |
64e7e238 SL |
2371 | this as 1, since it avoids making a QI or HI mode register. |
2372 | ||
2373 | But, generating word accesses for -mips16 is generally bad as shifts | |
2374 | (often extended) would be needed for byte accesses. */ | |
2375 | #define SLOW_BYTE_ACCESS (!TARGET_MIPS16) | |
e75b25e7 | 2376 | |
49042313 MX |
2377 | /* Standard MIPS integer shifts truncate the shift amount to the |
2378 | width of the shifted operand. However, Loongson vector shifts | |
2379 | do not truncate the shift amount at all. */ | |
1f5f063d | 2380 | #define SHIFT_COUNT_TRUNCATED (!TARGET_LOONGSON_VECTORS) |
e75b25e7 MM |
2381 | |
2382 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
2383 | is done just by pretending it is already truncated. */ | |
876c09d3 JW |
2384 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \ |
2385 | (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1) | |
e75b25e7 | 2386 | |
cafe096b | 2387 | |
e75b25e7 MM |
2388 | /* Specify the machine mode that pointers have. |
2389 | After generation of rtl, the compiler makes no further distinction | |
cafe096b | 2390 | between pointers and any other objects of this machine mode. */ |
876c09d3 | 2391 | |
1eeed24e | 2392 | #ifndef Pmode |
cafe096b | 2393 | #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode) |
1eeed24e | 2394 | #endif |
e75b25e7 | 2395 | |
cafe096b EC |
2396 | /* Give call MEMs SImode since it is the "most permissive" mode |
2397 | for both 32-bit and 64-bit targets. */ | |
e75b25e7 | 2398 | |
cafe096b | 2399 | #define FUNCTION_MODE SImode |
e75b25e7 | 2400 | |
e75b25e7 | 2401 | \f |
876c09d3 | 2402 | |
7506f491 DE |
2403 | /* Define if copies to/from condition code registers should be avoided. |
2404 | ||
2405 | This is needed for the MIPS because reload_outcc is not complete; | |
2406 | it needs to handle cases where the source is a general or another | |
2407 | condition code register. */ | |
2408 | #define AVOID_CCMODE_COPIES | |
2409 | ||
e75b25e7 MM |
2410 | /* A C expression for the cost of a branch instruction. A value of |
2411 | 1 is the default; other values are interpreted relative to that. */ | |
2412 | ||
3a4fd356 | 2413 | #define BRANCH_COST(speed_p, predictable_p) mips_branch_cost |
c1bd2d66 | 2414 | #define LOGICAL_OP_NON_SHORT_CIRCUIT 0 |
e75b25e7 | 2415 | |
0ff83799 MM |
2416 | /* If defined, modifies the length assigned to instruction INSN as a |
2417 | function of the context in which it is used. LENGTH is an lvalue | |
2418 | that contains the initially computed length of the insn and should | |
2419 | be updated with the correct length of the insn. */ | |
2420 | #define ADJUST_INSN_LENGTH(INSN, LENGTH) \ | |
2421 | ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH))) | |
a8c1d5f8 RS |
2422 | |
2423 | /* Return the asm template for a non-MIPS16 conditional branch instruction. | |
2424 | OPCODE is the opcode's mnemonic and OPERANDS is the asm template for | |
2425 | its operands. */ | |
2426 | #define MIPS_BRANCH(OPCODE, OPERANDS) \ | |
2427 | "%*" OPCODE "%?\t" OPERANDS "%/" | |
d9870b7e | 2428 | |
0c433c31 RS |
2429 | /* Return an asm string that forces INSN to be treated as an absolute |
2430 | J or JAL instruction instead of an assembler macro. */ | |
2431 | #define MIPS_ABSOLUTE_JUMP(INSN) \ | |
2432 | (TARGET_ABICALLS_PIC2 \ | |
2433 | ? ".option\tpic0\n\t" INSN "\n\t.option\tpic2" \ | |
2434 | : INSN) | |
2435 | ||
d9870b7e | 2436 | /* Return the asm template for a call. INSN is the instruction's mnemonic |
b53da244 AN |
2437 | ("j" or "jal"), OPERANDS are its operands, TARGET_OPNO is the operand |
2438 | number of the target. SIZE_OPNO is the operand number of the argument size | |
2439 | operand that can optionally hold the call attributes. If SIZE_OPNO is not | |
2440 | -1 and the call is indirect, use the function symbol from the call | |
2441 | attributes to attach a R_MIPS_JALR relocation to the call. | |
d9870b7e | 2442 | |
14976818 | 2443 | When generating GOT code without explicit relocation operators, |
d9870b7e RS |
2444 | all calls should use assembly macros. Otherwise, all indirect |
2445 | calls should use "jr" or "jalr"; we will arrange to restore $gp | |
2446 | afterwards if necessary. Finally, we can only generate direct | |
2447 | calls for -mabicalls by temporarily switching to non-PIC mode. */ | |
b53da244 | 2448 | #define MIPS_CALL(INSN, OPERANDS, TARGET_OPNO, SIZE_OPNO) \ |
14976818 | 2449 | (TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS \ |
b53da244 AN |
2450 | ? "%*" INSN "\t%" #TARGET_OPNO "%/" \ |
2451 | : (REG_P (OPERANDS[TARGET_OPNO]) \ | |
2452 | && mips_get_pic_call_symbol (OPERANDS, SIZE_OPNO)) \ | |
2453 | ? ("%*.reloc\t1f,R_MIPS_JALR,%" #SIZE_OPNO "\n" \ | |
2454 | "1:\t" INSN "r\t%" #TARGET_OPNO "%/") \ | |
2455 | : REG_P (OPERANDS[TARGET_OPNO]) \ | |
2456 | ? "%*" INSN "r\t%" #TARGET_OPNO "%/" \ | |
2457 | : MIPS_ABSOLUTE_JUMP ("%*" INSN "\t%" #TARGET_OPNO "%/")) | |
e75b25e7 MM |
2458 | \f |
2459 | /* Control the assembler format that we output. */ | |
2460 | ||
e75b25e7 MM |
2461 | /* Output to assembler file text saying following lines |
2462 | may contain character constants, extra white space, comments, etc. */ | |
2463 | ||
b2bcb32d | 2464 | #ifndef ASM_APP_ON |
e75b25e7 | 2465 | #define ASM_APP_ON " #APP\n" |
b2bcb32d | 2466 | #endif |
e75b25e7 MM |
2467 | |
2468 | /* Output to assembler file text saying following lines | |
2469 | no longer contain unusual constructs. */ | |
2470 | ||
b2bcb32d | 2471 | #ifndef ASM_APP_OFF |
e75b25e7 | 2472 | #define ASM_APP_OFF " #NO_APP\n" |
b2bcb32d | 2473 | #endif |
e75b25e7 | 2474 | |
5b9cc93e RS |
2475 | #define REGISTER_NAMES \ |
2476 | { "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \ | |
2477 | "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ | |
2478 | "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ | |
2479 | "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31", \ | |
2480 | "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \ | |
2481 | "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \ | |
2482 | "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \ | |
2483 | "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \ | |
2484 | "hi", "lo", "", "$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \ | |
0c433c31 | 2485 | "$fcc5","$fcc6","$fcc7","", "$cprestore", "$arg", "$frame", "$fakec", \ |
5b9cc93e RS |
2486 | "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7", \ |
2487 | "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15", \ | |
2488 | "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23", \ | |
2489 | "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31", \ | |
2490 | "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7", \ | |
2491 | "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15", \ | |
2492 | "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23", \ | |
2493 | "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31", \ | |
2494 | "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7", \ | |
2495 | "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15", \ | |
2496 | "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23", \ | |
118ea793 CF |
2497 | "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31", \ |
2498 | "$ac1hi","$ac1lo","$ac2hi","$ac2lo","$ac3hi","$ac3lo","$dsp_po","$dsp_sc", \ | |
2499 | "$dsp_ca","$dsp_ou","$dsp_cc","$dsp_ef" } | |
5b9cc93e RS |
2500 | |
2501 | /* List the "software" names for each register. Also list the numerical | |
2502 | names for $fp and $sp. */ | |
e75b25e7 MM |
2503 | |
2504 | #define ADDITIONAL_REGISTER_NAMES \ | |
2505 | { \ | |
e75b25e7 MM |
2506 | { "$29", 29 + GP_REG_FIRST }, \ |
2507 | { "$30", 30 + GP_REG_FIRST }, \ | |
e75b25e7 MM |
2508 | { "at", 1 + GP_REG_FIRST }, \ |
2509 | { "v0", 2 + GP_REG_FIRST }, \ | |
2510 | { "v1", 3 + GP_REG_FIRST }, \ | |
2511 | { "a0", 4 + GP_REG_FIRST }, \ | |
2512 | { "a1", 5 + GP_REG_FIRST }, \ | |
2513 | { "a2", 6 + GP_REG_FIRST }, \ | |
2514 | { "a3", 7 + GP_REG_FIRST }, \ | |
2515 | { "t0", 8 + GP_REG_FIRST }, \ | |
2516 | { "t1", 9 + GP_REG_FIRST }, \ | |
2517 | { "t2", 10 + GP_REG_FIRST }, \ | |
2518 | { "t3", 11 + GP_REG_FIRST }, \ | |
2519 | { "t4", 12 + GP_REG_FIRST }, \ | |
2520 | { "t5", 13 + GP_REG_FIRST }, \ | |
2521 | { "t6", 14 + GP_REG_FIRST }, \ | |
2522 | { "t7", 15 + GP_REG_FIRST }, \ | |
2523 | { "s0", 16 + GP_REG_FIRST }, \ | |
2524 | { "s1", 17 + GP_REG_FIRST }, \ | |
2525 | { "s2", 18 + GP_REG_FIRST }, \ | |
2526 | { "s3", 19 + GP_REG_FIRST }, \ | |
2527 | { "s4", 20 + GP_REG_FIRST }, \ | |
2528 | { "s5", 21 + GP_REG_FIRST }, \ | |
2529 | { "s6", 22 + GP_REG_FIRST }, \ | |
2530 | { "s7", 23 + GP_REG_FIRST }, \ | |
2531 | { "t8", 24 + GP_REG_FIRST }, \ | |
2532 | { "t9", 25 + GP_REG_FIRST }, \ | |
2533 | { "k0", 26 + GP_REG_FIRST }, \ | |
2534 | { "k1", 27 + GP_REG_FIRST }, \ | |
2535 | { "gp", 28 + GP_REG_FIRST }, \ | |
2536 | { "sp", 29 + GP_REG_FIRST }, \ | |
2537 | { "fp", 30 + GP_REG_FIRST }, \ | |
2538 | { "ra", 31 + GP_REG_FIRST }, \ | |
d604bca3 | 2539 | ALL_COP_ADDITIONAL_REGISTER_NAMES \ |
e75b25e7 MM |
2540 | } |
2541 | ||
33005162 | 2542 | /* This is meant to be redefined in the host dependent files. It is a |
d604bca3 MH |
2543 | set of alternative names and regnums for mips coprocessors. */ |
2544 | ||
2545 | #define ALL_COP_ADDITIONAL_REGISTER_NAMES | |
2546 | ||
e75b25e7 MM |
2547 | #define DBR_OUTPUT_SEQEND(STREAM) \ |
2548 | do \ | |
2549 | { \ | |
cf5fb4b0 RS |
2550 | /* Undo the effect of '%*'. */ \ |
2551 | mips_pop_asm_switch (&mips_nomacro); \ | |
2552 | mips_pop_asm_switch (&mips_noreorder); \ | |
2553 | /* Emit a blank line after the delay slot for emphasis. */ \ | |
e75b25e7 MM |
2554 | fputs ("\n", STREAM); \ |
2555 | } \ | |
2556 | while (0) | |
2557 | ||
3e487b21 | 2558 | /* mips-tfile does not understand .stabd directives. */ |
93a27b7b ZW |
2559 | #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \ |
2560 | dbxout_begin_stabn_sline (LINE); \ | |
2561 | dbxout_stab_value_internal_label ("LM", &COUNTER); \ | |
2562 | } while (0) | |
3e487b21 ZW |
2563 | |
2564 | /* Use .loc directives for SDB line numbers. */ | |
2565 | #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \ | |
93a27b7b | 2566 | fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE) |
e75b25e7 | 2567 | |
9ec36da5 | 2568 | /* The MIPS implementation uses some labels for its own purpose. The |
e75b25e7 MM |
2569 | following lists what labels are created, and are all formed by the |
2570 | pattern $L[a-z].*. The machine independent portion of GCC creates | |
2571 | labels matching: $L[A-Z][0-9]+ and $L[0-9]+. | |
2572 | ||
c5b7917e | 2573 | LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt. |
e75b25e7 MM |
2574 | $Lb[0-9]+ Begin blocks for MIPS debug support |
2575 | $Lc[0-9]+ Label for use in s<xx> operation. | |
33005162 | 2576 | $Le[0-9]+ End blocks for MIPS debug support */ |
e75b25e7 | 2577 | |
44404b8b | 2578 | #undef ASM_DECLARE_OBJECT_NAME |
c1115ccd | 2579 | #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \ |
586de218 | 2580 | mips_declare_object (STREAM, NAME, "", ":\n") |
31c714e3 | 2581 | |
506a61b1 KG |
2582 | /* Globalizing directive for a label. */ |
2583 | #define GLOBAL_ASM_OP "\t.globl\t" | |
e75b25e7 | 2584 | |
31c714e3 | 2585 | /* This says how to define a global common symbol. */ |
e75b25e7 | 2586 | |
35f5add9 | 2587 | #define ASM_OUTPUT_ALIGNED_DECL_COMMON mips_output_aligned_decl_common |
e75b25e7 | 2588 | |
112cdef5 | 2589 | /* This says how to define a local common symbol (i.e., not visible to |
31c714e3 | 2590 | linker). */ |
e75b25e7 | 2591 | |
48b2e0a7 RS |
2592 | #ifndef ASM_OUTPUT_ALIGNED_LOCAL |
2593 | #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \ | |
2594 | mips_declare_common_object (STREAM, NAME, "\n\t.lcomm\t", SIZE, ALIGN, false) | |
2595 | #endif | |
e75b25e7 MM |
2596 | |
2597 | /* This says how to output an external. It would be possible not to | |
2598 | output anything and let undefined symbol become external. However | |
2599 | the assembler uses length information on externals to allocate in | |
2600 | data/sdata bss/sbss, thereby saving exec time. */ | |
2601 | ||
4d9f4c46 | 2602 | #undef ASM_OUTPUT_EXTERNAL |
e75b25e7 MM |
2603 | #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \ |
2604 | mips_output_external(STREAM,DECL,NAME) | |
2605 | ||
e75b25e7 MM |
2606 | /* This is how to declare a function name. The actual work of |
2607 | emitting the label is moved to function_prologue, so that we can | |
2608 | get the line number correctly emitted before the .ent directive, | |
789b7de5 | 2609 | and after any .file directives. Define as empty so that the function |
4e314d1f EC |
2610 | is not declared before the .ent directive elsewhere. */ |
2611 | ||
44404b8b | 2612 | #undef ASM_DECLARE_FUNCTION_NAME |
33005162 | 2613 | #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) |
4e314d1f | 2614 | |
e75b25e7 MM |
2615 | /* This is how to store into the string LABEL |
2616 | the symbol_ref name of an internal numbered label where | |
2617 | PREFIX is the class of label and NUM is the number within the class. | |
2618 | This is suitable for output with `assemble_name'. */ | |
2619 | ||
44404b8b | 2620 | #undef ASM_GENERATE_INTERNAL_LABEL |
e75b25e7 | 2621 | #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ |
4f70758f | 2622 | sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM)) |
e75b25e7 | 2623 | |
370d36c6 RS |
2624 | /* Print debug labels as "foo = ." rather than "foo:" because they should |
2625 | represent a byte pointer rather than an ISA-encoded address. This is | |
2626 | particularly important for code like: | |
2627 | ||
2628 | $LFBxxx = . | |
2629 | .cfi_startproc | |
2630 | ... | |
2631 | .section .gcc_except_table,... | |
2632 | ... | |
2633 | .uleb128 foo-$LFBxxx | |
2634 | ||
2635 | The .uleb128 requies $LFBxxx to match the FDE start address, which is | |
2636 | likewise a byte pointer rather than an ISA-encoded address. | |
2637 | ||
2638 | At the time of writing, this hook is not used for the function end | |
2639 | label: | |
2640 | ||
2641 | $LFExxx: | |
2642 | .end foo | |
2643 | ||
2644 | But this doesn't matter, because GAS doesn't treat a pre-.end label | |
2645 | as a MIPS16 one anyway. */ | |
2646 | ||
2647 | #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \ | |
2648 | fprintf (FILE, "%s%s%d = .\n", LOCAL_LABEL_PREFIX, PREFIX, NUM) | |
2649 | ||
e75b25e7 MM |
2650 | /* This is how to output an element of a case-vector that is absolute. */ |
2651 | ||
2652 | #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ | |
6ae1498b | 2653 | fprintf (STREAM, "\t%s\t%sL%d\n", \ |
cafe096b | 2654 | ptr_mode == DImode ? ".dword" : ".word", \ |
6ae1498b | 2655 | LOCAL_LABEL_PREFIX, \ |
876c09d3 | 2656 | VALUE) |
e75b25e7 | 2657 | |
827555ea RS |
2658 | /* This is how to output an element of a case-vector. We can make the |
2659 | entries PC-relative in MIPS16 code and GP-relative when .gp(d)word | |
2660 | is supported. */ | |
e75b25e7 | 2661 | |
33f7f353 | 2662 | #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ |
e0bfcea5 | 2663 | do { \ |
c93c5160 | 2664 | if (TARGET_MIPS16_SHORT_JUMP_TABLES) \ |
2bcb2ab3 GK |
2665 | fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \ |
2666 | LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \ | |
cafe096b | 2667 | else if (TARGET_GPWORD) \ |
6ae1498b | 2668 | fprintf (STREAM, "\t%s\t%sL%d\n", \ |
cafe096b | 2669 | ptr_mode == DImode ? ".gpdword" : ".gpword", \ |
6ae1498b | 2670 | LOCAL_LABEL_PREFIX, VALUE); \ |
8cb6400c RS |
2671 | else if (TARGET_RTP_PIC) \ |
2672 | { \ | |
2673 | /* Make the entry relative to the start of the function. */ \ | |
2674 | rtx fnsym = XEXP (DECL_RTL (current_function_decl), 0); \ | |
2675 | fprintf (STREAM, "\t%s\t%sL%d-", \ | |
2676 | Pmode == DImode ? ".dword" : ".word", \ | |
2677 | LOCAL_LABEL_PREFIX, VALUE); \ | |
2678 | assemble_name (STREAM, XSTR (fnsym, 0)); \ | |
2679 | fprintf (STREAM, "\n"); \ | |
2680 | } \ | |
516a2dfd | 2681 | else \ |
b2d8cf33 | 2682 | fprintf (STREAM, "\t%s\t%sL%d\n", \ |
cafe096b | 2683 | ptr_mode == DImode ? ".dword" : ".word", \ |
b2d8cf33 | 2684 | LOCAL_LABEL_PREFIX, VALUE); \ |
e0bfcea5 ILT |
2685 | } while (0) |
2686 | ||
e75b25e7 MM |
2687 | /* This is how to output an assembler line |
2688 | that says to advance the location counter | |
2689 | to a multiple of 2**LOG bytes. */ | |
2690 | ||
2691 | #define ASM_OUTPUT_ALIGN(STREAM,LOG) \ | |
a688e0b7 | 2692 | fprintf (STREAM, "\t.align\t%d\n", (LOG)) |
e75b25e7 | 2693 | |
38e01259 | 2694 | /* This is how to output an assembler line to advance the location |
e75b25e7 MM |
2695 | counter by SIZE bytes. */ |
2696 | ||
44404b8b | 2697 | #undef ASM_OUTPUT_SKIP |
e75b25e7 | 2698 | #define ASM_OUTPUT_SKIP(STREAM,SIZE) \ |
c394cdb7 | 2699 | fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE)) |
e75b25e7 | 2700 | |
e75b25e7 | 2701 | /* This is how to output a string. */ |
44404b8b | 2702 | #undef ASM_OUTPUT_ASCII |
65239d20 | 2703 | #define ASM_OUTPUT_ASCII mips_output_ascii |
e75b25e7 | 2704 | |
e75b25e7 | 2705 | /* Output #ident as a in the read-only data section. */ |
0e5a4ad8 | 2706 | #undef ASM_OUTPUT_IDENT |
e75b25e7 MM |
2707 | #define ASM_OUTPUT_IDENT(FILE, STRING) \ |
2708 | { \ | |
3cce094d | 2709 | const char *p = STRING; \ |
e75b25e7 | 2710 | int size = strlen (p) + 1; \ |
d6b5193b | 2711 | switch_to_section (readonly_data_section); \ |
e75b25e7 MM |
2712 | assemble_string (p, size); \ |
2713 | } | |
2714 | \f | |
b82b0773 MM |
2715 | /* Default to -G 8 */ |
2716 | #ifndef MIPS_DEFAULT_GVALUE | |
2717 | #define MIPS_DEFAULT_GVALUE 8 | |
2718 | #endif | |
e75b25e7 | 2719 | |
f3b39eba MM |
2720 | /* Define the strings to put out for each section in the object file. */ |
2721 | #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */ | |
2722 | #define DATA_SECTION_ASM_OP "\t.data" /* large data */ | |
2017ed61 EC |
2723 | |
2724 | #undef READONLY_DATA_SECTION_ASM_OP | |
d48bc59a | 2725 | #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */ |
e75b25e7 | 2726 | \f |
e75b25e7 MM |
2727 | #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \ |
2728 | do \ | |
2729 | { \ | |
f29adf5b SL |
2730 | fprintf (STREAM, "\t%s\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \ |
2731 | TARGET_64BIT ? "daddiu" : "addiu", \ | |
e75b25e7 MM |
2732 | reg_names[STACK_POINTER_REGNUM], \ |
2733 | reg_names[STACK_POINTER_REGNUM], \ | |
876c09d3 | 2734 | TARGET_64BIT ? "sd" : "sw", \ |
e75b25e7 MM |
2735 | reg_names[REGNO], \ |
2736 | reg_names[STACK_POINTER_REGNUM]); \ | |
2737 | } \ | |
2738 | while (0) | |
2739 | ||
2740 | #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \ | |
2741 | do \ | |
2742 | { \ | |
cf5fb4b0 | 2743 | mips_push_asm_switch (&mips_noreorder); \ |
876c09d3 JW |
2744 | fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \ |
2745 | TARGET_64BIT ? "ld" : "lw", \ | |
e75b25e7 MM |
2746 | reg_names[REGNO], \ |
2747 | reg_names[STACK_POINTER_REGNUM], \ | |
876c09d3 | 2748 | TARGET_64BIT ? "daddu" : "addu", \ |
e75b25e7 MM |
2749 | reg_names[STACK_POINTER_REGNUM], \ |
2750 | reg_names[STACK_POINTER_REGNUM]); \ | |
cf5fb4b0 | 2751 | mips_pop_asm_switch (&mips_noreorder); \ |
e75b25e7 MM |
2752 | } \ |
2753 | while (0) | |
2754 | ||
4baed42f DE |
2755 | /* How to start an assembler comment. |
2756 | The leading space is important (the mips native assembler requires it). */ | |
e75b25e7 | 2757 | #ifndef ASM_COMMENT_START |
4baed42f | 2758 | #define ASM_COMMENT_START " #" |
e75b25e7 | 2759 | #endif |
3f1f8d8c | 2760 | \f |
498887c8 | 2761 | #undef SIZE_TYPE |
cafe096b | 2762 | #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int") |
3f1f8d8c | 2763 | |
498887c8 | 2764 | #undef PTRDIFF_TYPE |
cafe096b | 2765 | #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int") |
cfa31150 | 2766 | |
a1c6b246 RS |
2767 | /* The maximum number of bytes that can be copied by one iteration of |
2768 | a movmemsi loop; see mips_block_move_loop. */ | |
2769 | #define MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER \ | |
2770 | (UNITS_PER_WORD * 4) | |
2771 | ||
2772 | /* The maximum number of bytes that can be copied by a straight-line | |
2773 | implementation of movmemsi; see mips_block_move_straight. We want | |
2774 | to make sure that any loop-based implementation will iterate at | |
2775 | least twice. */ | |
2776 | #define MIPS_MAX_MOVE_BYTES_STRAIGHT \ | |
2777 | (MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER * 2) | |
2778 | ||
cfa31150 SL |
2779 | /* The base cost of a memcpy call, for MOVE_RATIO and friends. These |
2780 | values were determined experimentally by benchmarking with CSiBE. | |
2781 | In theory, the call overhead is higher for TARGET_ABICALLS (especially | |
2782 | for o32 where we have to restore $gp afterwards as well as make an | |
2783 | indirect call), but in practice, bumping this up higher for | |
2784 | TARGET_ABICALLS doesn't make much difference to code size. */ | |
2785 | ||
2786 | #define MIPS_CALL_RATIO 8 | |
2787 | ||
a1c6b246 RS |
2788 | /* Any loop-based implementation of movmemsi will have at least |
2789 | MIPS_MAX_MOVE_BYTES_STRAIGHT / UNITS_PER_WORD memory-to-memory | |
2790 | moves, so allow individual copies of fewer elements. | |
2791 | ||
2792 | When movmemsi is not available, use a value approximating | |
2793 | the length of a memcpy call sequence, so that move_by_pieces | |
2794 | will generate inline code if it is shorter than a function call. | |
2795 | Since move_by_pieces_ninsns counts memory-to-memory moves, but | |
2796 | we'll have to generate a load/store pair for each, halve the | |
2797 | value of MIPS_CALL_RATIO to take that into account. */ | |
2798 | ||
e04ad03d | 2799 | #define MOVE_RATIO(speed) \ |
a1c6b246 RS |
2800 | (HAVE_movmemsi \ |
2801 | ? MIPS_MAX_MOVE_BYTES_STRAIGHT / MOVE_MAX \ | |
2802 | : MIPS_CALL_RATIO / 2) | |
2803 | ||
2804 | /* movmemsi is meant to generate code that is at least as good as | |
2805 | move_by_pieces. However, movmemsi effectively uses a by-pieces | |
2806 | implementation both for moves smaller than a word and for word-aligned | |
2807 | moves of no more than MIPS_MAX_MOVE_BYTES_STRAIGHT bytes. We should | |
2808 | allow the tree-level optimisers to do such moves by pieces, as it | |
2809 | often exposes other optimization opportunities. We might as well | |
2810 | continue to use movmemsi at the rtl level though, as it produces | |
2811 | better code when scheduling is disabled (such as at -O). */ | |
2812 | ||
2813 | #define MOVE_BY_PIECES_P(SIZE, ALIGN) \ | |
2814 | (HAVE_movmemsi \ | |
2815 | ? (!currently_expanding_to_rtl \ | |
2816 | && ((ALIGN) < BITS_PER_WORD \ | |
2817 | ? (SIZE) < UNITS_PER_WORD \ | |
2818 | : (SIZE) <= MIPS_MAX_MOVE_BYTES_STRAIGHT)) \ | |
2819 | : (move_by_pieces_ninsns (SIZE, ALIGN, MOVE_MAX_PIECES + 1) \ | |
e04ad03d | 2820 | < (unsigned int) MOVE_RATIO (false))) |
cfa31150 SL |
2821 | |
2822 | /* For CLEAR_RATIO, when optimizing for size, give a better estimate | |
2823 | of the length of a memset call, but use the default otherwise. */ | |
2824 | ||
e04ad03d JH |
2825 | #define CLEAR_RATIO(speed)\ |
2826 | ((speed) ? 15 : MIPS_CALL_RATIO) | |
cfa31150 SL |
2827 | |
2828 | /* This is similar to CLEAR_RATIO, but for a non-zero constant, so when | |
2829 | optimizing for size adjust the ratio to account for the overhead of | |
2830 | loading the constant and replicating it across the word. */ | |
2831 | ||
e04ad03d JH |
2832 | #define SET_RATIO(speed) \ |
2833 | ((speed) ? 15 : MIPS_CALL_RATIO - 2) | |
cfa31150 SL |
2834 | |
2835 | /* STORE_BY_PIECES_P can be used when copying a constant string, but | |
2836 | in that case each word takes 3 insns (lui, ori, sw), or more in | |
2837 | 64-bit mode, instead of 2 (lw, sw). For now we always fail this | |
2838 | and let the move_by_pieces code copy the string from read-only | |
2839 | memory. In the future, this could be tuned further for multi-issue | |
2840 | CPUs that can issue stores down one pipe and arithmetic instructions | |
2841 | down another; in that case, the lui/ori/sw combination would be a | |
2842 | win for long enough strings. */ | |
2843 | ||
2844 | #define STORE_BY_PIECES_P(SIZE, ALIGN) 0 | |
2bcb2ab3 | 2845 | \f |
28727f1f | 2846 | #ifndef __mips16 |
3c0121e4 AO |
2847 | /* Since the bits of the _init and _fini function is spread across |
2848 | many object files, each potentially with its own GP, we must assume | |
2849 | we need to load our GP. We don't preserve $gp or $ra, since each | |
2850 | init/fini chunk is supposed to initialize $gp, and crti/crtn | |
2851 | already take care of preserving $ra and, when appropriate, $gp. */ | |
27d54b2a | 2852 | #if (defined _ABIO32 && _MIPS_SIM == _ABIO32) |
3c0121e4 AO |
2853 | #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ |
2854 | asm (SECTION_OP "\n\ | |
2855 | .set noreorder\n\ | |
2856 | bal 1f\n\ | |
2857 | nop\n\ | |
2858 | 1: .cpload $31\n\ | |
2859 | .set reorder\n\ | |
2860 | jal " USER_LABEL_PREFIX #FUNC "\n\ | |
2861 | " TEXT_SECTION_ASM_OP); | |
e1551d47 AO |
2862 | #endif /* Switch to #elif when we're no longer limited by K&R C. */ |
2863 | #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \ | |
3c0121e4 AO |
2864 | || (defined _ABI64 && _MIPS_SIM == _ABI64) |
2865 | #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ | |
2866 | asm (SECTION_OP "\n\ | |
2867 | .set noreorder\n\ | |
2868 | bal 1f\n\ | |
2869 | nop\n\ | |
2870 | 1: .set reorder\n\ | |
2871 | .cpsetup $31, $2, 1b\n\ | |
2872 | jal " USER_LABEL_PREFIX #FUNC "\n\ | |
2873 | " TEXT_SECTION_ASM_OP); | |
2874 | #endif | |
28727f1f | 2875 | #endif |
69229b81 DJ |
2876 | |
2877 | #ifndef HAVE_AS_TLS | |
2878 | #define HAVE_AS_TLS 0 | |
2879 | #endif | |
8d2fc1c4 | 2880 | |
ab77a036 | 2881 | #ifndef USED_FOR_TARGET |
cf5fb4b0 RS |
2882 | /* Information about ".set noFOO; ...; .set FOO" blocks. */ |
2883 | struct mips_asm_switch { | |
2884 | /* The FOO in the description above. */ | |
2885 | const char *name; | |
2886 | ||
2887 | /* The current block nesting level, or 0 if we aren't in a block. */ | |
2888 | int nesting_level; | |
2889 | }; | |
2890 | ||
ab77a036 | 2891 | extern const enum reg_class mips_regno_to_class[]; |
65239d20 | 2892 | extern bool mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER]; |
ab77a036 RS |
2893 | extern const char *current_function_file; /* filename current function is in */ |
2894 | extern int num_source_filenames; /* current .file # */ | |
cf5fb4b0 RS |
2895 | extern struct mips_asm_switch mips_noreorder; |
2896 | extern struct mips_asm_switch mips_nomacro; | |
2897 | extern struct mips_asm_switch mips_noat; | |
ab77a036 RS |
2898 | extern int mips_dbx_regno[]; |
2899 | extern int mips_dwarf_regno[]; | |
2900 | extern bool mips_split_p[]; | |
08d0963a | 2901 | extern bool mips_split_hi_p[]; |
24609606 RS |
2902 | extern enum processor mips_arch; /* which cpu to codegen for */ |
2903 | extern enum processor mips_tune; /* which cpu to schedule for */ | |
ab77a036 RS |
2904 | extern int mips_isa; /* architectural level */ |
2905 | extern int mips_abi; /* which ABI to use */ | |
ab77a036 RS |
2906 | extern const struct mips_cpu_info *mips_arch_info; |
2907 | extern const struct mips_cpu_info *mips_tune_info; | |
60730ade | 2908 | extern bool mips_base_mips16; |
ab77a036 | 2909 | extern enum mips_code_readable_setting mips_code_readable; |
5aa62249 | 2910 | extern GTY(()) struct target_globals *mips16_globals; |
ab77a036 | 2911 | #endif |
58684fa0 MK |
2912 | |
2913 | /* Enable querying of DFA units. */ | |
2914 | #define CPU_UNITS_QUERY 1 | |
1afc5373 CF |
2915 | |
2916 | #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ | |
2917 | mips_final_prescan_insn (INSN, OPVEC, NOPERANDS) | |
28143fdd | 2918 | |
49576e25 RS |
2919 | /* As on most targets, we want the .eh_frame section to be read-only where |
2920 | possible. And as on most targets, this means two things: | |
2921 | ||
2922 | (a) Non-locally-binding pointers must have an indirect encoding, | |
2923 | so that the addresses in the .eh_frame section itself become | |
2924 | locally-binding. | |
2925 | ||
2926 | (b) A shared library's .eh_frame section must encode locally-binding | |
2927 | pointers in a relative (relocation-free) form. | |
2928 | ||
2929 | However, MIPS has traditionally not allowed directives like: | |
2930 | ||
2931 | .long x-. | |
2932 | ||
2933 | in cases where "x" is in a different section, or is not defined in the | |
2934 | same assembly file. We are therefore unable to emit the PC-relative | |
2935 | form required by (b) at assembly time. | |
2936 | ||
2937 | Fortunately, the linker is able to convert absolute addresses into | |
2938 | PC-relative addresses on our behalf. Unfortunately, only certain | |
2939 | versions of the linker know how to do this for indirect pointers, | |
2940 | and for personality data. We must fall back on using writable | |
2941 | .eh_frame sections for shared libraries if the linker does not | |
2942 | support this feature. */ | |
2943 | #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \ | |
2944 | (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_absptr) | |
5aa62249 RS |
2945 | |
2946 | /* For switching between MIPS16 and non-MIPS16 modes. */ | |
2947 | #define SWITCHABLE_TARGET 1 |