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f5a1b0d2 | 1 | /* Definitions of target machine for GNU compiler, for ARM. |
63114329 | 2 | Copyright (C) 1991, 93, 94, 95, 96, 97, 98, 1999 Free Software Foundation, Inc. |
35d965d5 | 3 | Contributed by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl) |
8b109b37 | 4 | and Martin Simmons (@harleqn.co.uk). |
ff9940b0 RE |
5 | More major hacks by Richard Earnshaw (rwe11@cl.cam.ac.uk) |
6 | ||
35d965d5 RS |
7 | This file is part of GNU CC. |
8 | ||
9 | GNU CC is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2, or (at your option) | |
12 | any later version. | |
13 | ||
14 | GNU CC is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with GNU CC; see the file COPYING. If not, write to | |
8fb289e7 RK |
21 | the Free Software Foundation, 59 Temple Place - Suite 330, |
22 | Boston, MA 02111-1307, USA. */ | |
35d965d5 | 23 | |
52a02435 | 24 | /* Configuration triples for ARM ports work as follows: |
9e7d0bcc | 25 | (This is a bit of a mess and needs some thought) |
52a02435 DE |
26 | arm-*-*: little endian |
27 | armel-*-*: little endian | |
28 | armeb-*-*: big endian | |
5da4dc2c DE |
29 | If a non-embedded environment (ie: "real" OS) is specified, `arm' |
30 | should default to that used by the OS. | |
52a02435 DE |
31 | */ |
32 | ||
b355a481 NC |
33 | #ifndef __ARM_H__ |
34 | #define __ARM_H__ | |
35 | ||
7a801826 RE |
36 | #define TARGET_CPU_arm2 0x0000 |
37 | #define TARGET_CPU_arm250 0x0000 | |
38 | #define TARGET_CPU_arm3 0x0000 | |
39 | #define TARGET_CPU_arm6 0x0001 | |
40 | #define TARGET_CPU_arm600 0x0001 | |
41 | #define TARGET_CPU_arm610 0x0002 | |
42 | #define TARGET_CPU_arm7 0x0001 | |
43 | #define TARGET_CPU_arm7m 0x0004 | |
44 | #define TARGET_CPU_arm7dm 0x0004 | |
45 | #define TARGET_CPU_arm7dmi 0x0004 | |
46 | #define TARGET_CPU_arm700 0x0001 | |
47 | #define TARGET_CPU_arm710 0x0002 | |
48 | #define TARGET_CPU_arm7100 0x0002 | |
49 | #define TARGET_CPU_arm7500 0x0002 | |
50 | #define TARGET_CPU_arm7500fe 0x1001 | |
51 | #define TARGET_CPU_arm7tdmi 0x0008 | |
52 | #define TARGET_CPU_arm8 0x0010 | |
53 | #define TARGET_CPU_arm810 0x0020 | |
54 | #define TARGET_CPU_strongarm 0x0040 | |
55 | #define TARGET_CPU_strongarm110 0x0040 | |
f5a1b0d2 | 56 | #define TARGET_CPU_strongarm1100 0x0040 |
b36ba79f RE |
57 | #define TARGET_CPU_arm9 0x0080 |
58 | #define TARGET_CPU_arm9tdmi 0x0080 | |
7a801826 RE |
59 | /* Configure didn't specify */ |
60 | #define TARGET_CPU_generic 0x8000 | |
ff9940b0 | 61 | |
89c7ca52 RE |
62 | enum arm_cond_code |
63 | { | |
64 | ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC, | |
65 | ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV | |
66 | }; | |
67 | extern enum arm_cond_code arm_current_cc; | |
ff9940b0 RE |
68 | extern char *arm_condition_codes[]; |
69 | ||
89c7ca52 RE |
70 | #define ARM_INVERSE_CONDITION_CODE(X) ((enum arm_cond_code) (((int)X) ^ 1)) |
71 | ||
ff9940b0 RE |
72 | /* This is needed by the tail-calling peepholes */ |
73 | extern int frame_pointer_needed; | |
74 | ||
35d965d5 | 75 | \f |
7a801826 RE |
76 | /* Just in case configure has failed to define anything. */ |
77 | #ifndef TARGET_CPU_DEFAULT | |
78 | #define TARGET_CPU_DEFAULT TARGET_CPU_generic | |
79 | #endif | |
80 | ||
81 | /* If the configuration file doesn't specify the cpu, the subtarget may | |
82 | override it. If it doesn't, then default to an ARM6. */ | |
83 | #if TARGET_CPU_DEFAULT == TARGET_CPU_generic | |
84 | #undef TARGET_CPU_DEFAULT | |
85 | #ifdef SUBTARGET_CPU_DEFAULT | |
86 | #define TARGET_CPU_DEFAULT SUBTARGET_CPU_DEFAULT | |
87 | #else | |
88 | #define TARGET_CPU_DEFAULT TARGET_CPU_arm6 | |
89 | #endif | |
90 | #endif | |
91 | ||
92 | #if TARGET_CPU_DEFAULT == TARGET_CPU_arm2 | |
93 | #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_2__" | |
94 | #else | |
18543a22 | 95 | #if TARGET_CPU_DEFAULT == TARGET_CPU_arm6 || TARGET_CPU_DEFAULT == TARGET_CPU_arm610 || TARGET_CPU_DEFAULT == TARGET_CPU_arm7500fe |
7a801826 RE |
96 | #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3__" |
97 | #else | |
98 | #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7m | |
99 | #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3M__" | |
100 | #else | |
9f6ce990 | 101 | #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7tdmi || TARGET_CPU_DEFAULT == TARGET_CPU_arm9 |
7a801826 RE |
102 | #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__" |
103 | #else | |
104 | #if TARGET_CPU_DEFAULT == TARGET_CPU_arm8 || TARGET_CPU_DEFAULT == TARGET_CPU_arm810 || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm | |
105 | #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4__" | |
106 | #else | |
107 | Unrecognized value in TARGET_CPU_DEFAULT. | |
108 | #endif | |
109 | #endif | |
110 | #endif | |
111 | #endif | |
112 | #endif | |
113 | ||
ff9940b0 RE |
114 | #ifndef CPP_PREDEFINES |
115 | #define CPP_PREDEFINES "-Darm -Acpu(arm) -Amachine(arm)" | |
116 | #endif | |
35d965d5 | 117 | |
38fc909b RE |
118 | #define CPP_SPEC "\ |
119 | %(cpp_cpu_arch) %(cpp_apcs_pc) %(cpp_float) \ | |
120 | %(cpp_endian) %(subtarget_cpp_spec)" | |
7a801826 | 121 | |
71791e16 RE |
122 | /* Set the architecture define -- if -march= is set, then it overrides |
123 | the -mcpu= setting. */ | |
7a801826 | 124 | #define CPP_CPU_ARCH_SPEC "\ |
71791e16 RE |
125 | %{march=arm2:-D__ARM_ARCH_2__} \ |
126 | %{march=arm250:-D__ARM_ARCH_2__} \ | |
127 | %{march=arm3:-D__ARM_ARCH_2__} \ | |
128 | %{march=arm6:-D__ARM_ARCH_3__} \ | |
129 | %{march=arm600:-D__ARM_ARCH_3__} \ | |
130 | %{march=arm610:-D__ARM_ARCH_3__} \ | |
131 | %{march=arm7:-D__ARM_ARCH_3__} \ | |
132 | %{march=arm700:-D__ARM_ARCH_3__} \ | |
133 | %{march=arm710:-D__ARM_ARCH_3__} \ | |
134 | %{march=arm7100:-D__ARM_ARCH_3__} \ | |
135 | %{march=arm7500:-D__ARM_ARCH_3__} \ | |
136 | %{march=arm7500fe:-D__ARM_ARCH_3__} \ | |
137 | %{march=arm7m:-D__ARM_ARCH_3M__} \ | |
138 | %{march=arm7dm:-D__ARM_ARCH_3M__} \ | |
139 | %{march=arm7dmi:-D__ARM_ARCH_3M__} \ | |
140 | %{march=arm7tdmi:-D__ARM_ARCH_4T__} \ | |
141 | %{march=arm8:-D__ARM_ARCH_4__} \ | |
142 | %{march=arm810:-D__ARM_ARCH_4__} \ | |
b36ba79f | 143 | %{march=arm9:-D__ARM_ARCH_4T__} \ |
60d0536b NC |
144 | %{march=arm920:-D__ARM_ARCH_4__} \ |
145 | %{march=arm920t:-D__ARM_ARCH_4T__} \ | |
b36ba79f | 146 | %{march=arm9tdmi:-D__ARM_ARCH_4T__} \ |
71791e16 RE |
147 | %{march=strongarm:-D__ARM_ARCH_4__} \ |
148 | %{march=strongarm110:-D__ARM_ARCH_4__} \ | |
f5a1b0d2 | 149 | %{march=strongarm1100:-D__ARM_ARCH_4__} \ |
71791e16 RE |
150 | %{march=armv2:-D__ARM_ARCH_2__} \ |
151 | %{march=armv2a:-D__ARM_ARCH_2__} \ | |
152 | %{march=armv3:-D__ARM_ARCH_3__} \ | |
153 | %{march=armv3m:-D__ARM_ARCH_3M__} \ | |
154 | %{march=armv4:-D__ARM_ARCH_4__} \ | |
155 | %{march=armv4t:-D__ARM_ARCH_4T__} \ | |
156 | %{!march=*: \ | |
157 | %{mcpu=arm2:-D__ARM_ARCH_2__} \ | |
158 | %{mcpu=arm250:-D__ARM_ARCH_2__} \ | |
159 | %{mcpu=arm3:-D__ARM_ARCH_2__} \ | |
160 | %{mcpu=arm6:-D__ARM_ARCH_3__} \ | |
161 | %{mcpu=arm600:-D__ARM_ARCH_3__} \ | |
162 | %{mcpu=arm610:-D__ARM_ARCH_3__} \ | |
163 | %{mcpu=arm7:-D__ARM_ARCH_3__} \ | |
164 | %{mcpu=arm700:-D__ARM_ARCH_3__} \ | |
165 | %{mcpu=arm710:-D__ARM_ARCH_3__} \ | |
166 | %{mcpu=arm7100:-D__ARM_ARCH_3__} \ | |
167 | %{mcpu=arm7500:-D__ARM_ARCH_3__} \ | |
168 | %{mcpu=arm7500fe:-D__ARM_ARCH_3__} \ | |
169 | %{mcpu=arm7m:-D__ARM_ARCH_3M__} \ | |
170 | %{mcpu=arm7dm:-D__ARM_ARCH_3M__} \ | |
171 | %{mcpu=arm7dmi:-D__ARM_ARCH_3M__} \ | |
172 | %{mcpu=arm7tdmi:-D__ARM_ARCH_4T__} \ | |
173 | %{mcpu=arm8:-D__ARM_ARCH_4__} \ | |
174 | %{mcpu=arm810:-D__ARM_ARCH_4__} \ | |
b36ba79f | 175 | %{mcpu=arm9:-D__ARM_ARCH_4T__} \ |
60d0536b NC |
176 | %{mcpu=arm920:-D__ARM_ARCH_4__} \ |
177 | %{mcpu=arm920t:-D__ARM_ARCH_4T__} \ | |
b36ba79f | 178 | %{mcpu=arm9tdmi:-D__ARM_ARCH_4T__} \ |
71791e16 RE |
179 | %{mcpu=strongarm:-D__ARM_ARCH_4__} \ |
180 | %{mcpu=strongarm110:-D__ARM_ARCH_4__} \ | |
f5a1b0d2 | 181 | %{mcpu=strongarm1100:-D__ARM_ARCH_4__} \ |
dfa08768 | 182 | %{!mcpu*:%(cpp_cpu_arch_default)}} \ |
11c1a207 | 183 | " |
7a801826 RE |
184 | |
185 | /* Define __APCS_26__ if the PC also contains the PSR */ | |
7a801826 RE |
186 | #define CPP_APCS_PC_SPEC "\ |
187 | %{mapcs-32:%{mapcs-26:%e-mapcs-26 and -mapcs-32 may not be used together} \ | |
188 | -D__APCS_32__} \ | |
189 | %{mapcs-26:-D__APCS_26__} \ | |
dfa08768 | 190 | %{!mapcs-32: %{!mapcs-26:%(cpp_apcs_pc_default)}} \ |
7a801826 RE |
191 | " |
192 | ||
b355a481 | 193 | #ifndef CPP_APCS_PC_DEFAULT_SPEC |
7a801826 | 194 | #define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_26__" |
b355a481 | 195 | #endif |
7a801826 RE |
196 | |
197 | #define CPP_FLOAT_SPEC "\ | |
198 | %{msoft-float:\ | |
199 | %{mhard-float:%e-msoft-float and -mhard_float may not be used together} \ | |
200 | -D__SOFTFP__} \ | |
201 | %{!mhard-float:%{!msoft-float:%(cpp_float_default)}} \ | |
202 | " | |
203 | ||
204 | /* Default is hard float, which doesn't define anything */ | |
205 | #define CPP_FLOAT_DEFAULT_SPEC "" | |
206 | ||
207 | #define CPP_ENDIAN_SPEC "\ | |
208 | %{mbig-endian: \ | |
209 | %{mlittle-endian: \ | |
210 | %e-mbig-endian and -mlittle-endian may not be used together} \ | |
7a801826 | 211 | -D__ARMEB__ %{mwords-little-endian:-D__ARMWEL__}} \ |
9e7d0bcc | 212 | %{!mlittle-endian:%{!mbig-endian:%(cpp_endian_default)}} \ |
7a801826 RE |
213 | " |
214 | ||
215 | /* Default is little endian, which doesn't define anything. */ | |
216 | #define CPP_ENDIAN_DEFAULT_SPEC "" | |
217 | ||
dfa08768 | 218 | #define CC1_SPEC "" |
7a801826 RE |
219 | |
220 | /* This macro defines names of additional specifications to put in the specs | |
221 | that can be used in various specifications like CC1_SPEC. Its definition | |
222 | is an initializer with a subgrouping for each command option. | |
223 | ||
224 | Each subgrouping contains a string constant, that defines the | |
225 | specification name, and a string constant that used by the GNU CC driver | |
226 | program. | |
227 | ||
228 | Do not define this macro if it does not need to do anything. */ | |
229 | #define EXTRA_SPECS \ | |
230 | { "cpp_cpu_arch", CPP_CPU_ARCH_SPEC }, \ | |
231 | { "cpp_cpu_arch_default", CPP_ARCH_DEFAULT_SPEC }, \ | |
232 | { "cpp_apcs_pc", CPP_APCS_PC_SPEC }, \ | |
233 | { "cpp_apcs_pc_default", CPP_APCS_PC_DEFAULT_SPEC }, \ | |
234 | { "cpp_float", CPP_FLOAT_SPEC }, \ | |
235 | { "cpp_float_default", CPP_FLOAT_DEFAULT_SPEC }, \ | |
236 | { "cpp_endian", CPP_ENDIAN_SPEC }, \ | |
237 | { "cpp_endian_default", CPP_ENDIAN_DEFAULT_SPEC }, \ | |
38fc909b | 238 | { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \ |
7a801826 RE |
239 | SUBTARGET_EXTRA_SPECS |
240 | ||
241 | #define SUBTARGET_EXTRA_SPECS | |
38fc909b | 242 | #define SUBTARGET_CPP_SPEC "" |
7a801826 | 243 | |
35d965d5 RS |
244 | \f |
245 | /* Run-time Target Specification. */ | |
ff9940b0 | 246 | #ifndef TARGET_VERSION |
35d965d5 | 247 | #define TARGET_VERSION \ |
ff9940b0 RE |
248 | fputs (" (ARM/generic)", stderr); |
249 | #endif | |
35d965d5 | 250 | |
11c1a207 | 251 | /* Run-time compilation parameters selecting different hardware subsets. */ |
35d965d5 RS |
252 | extern int target_flags; |
253 | ||
71791e16 | 254 | /* The floating point instruction architecture, can be 2 or 3 */ |
f9cc092a | 255 | extern const char * target_fp_name; |
11c1a207 | 256 | |
35d965d5 RS |
257 | /* Nonzero if the function prologue (and epilogue) should obey |
258 | the ARM Procedure Call Standard. */ | |
11c1a207 | 259 | #define ARM_FLAG_APCS_FRAME (0x0001) |
35d965d5 RS |
260 | |
261 | /* Nonzero if the function prologue should output the function name to enable | |
262 | the post mortem debugger to print a backtrace (very useful on RISCOS, | |
11c1a207 RE |
263 | unused on RISCiX). Specifying this flag also enables |
264 | -fno-omit-frame-pointer. | |
35d965d5 | 265 | XXX Must still be implemented in the prologue. */ |
11c1a207 | 266 | #define ARM_FLAG_POKE (0x0002) |
35d965d5 RS |
267 | |
268 | /* Nonzero if floating point instructions are emulated by the FPE, in which | |
269 | case instruction scheduling becomes very uninteresting. */ | |
11c1a207 | 270 | #define ARM_FLAG_FPE (0x0004) |
35d965d5 | 271 | |
11c1a207 RE |
272 | /* Nonzero if destined for a processor in 32-bit program mode. Takes out bit |
273 | that assume restoration of the condition flags when returning from a | |
274 | branch and link (ie a function). */ | |
275 | #define ARM_FLAG_APCS_32 (0x0020) | |
276 | ||
dfa08768 RE |
277 | /* FLAGS 0x0008 and 0x0010 are now spare (used to be arm3/6 selection). */ |
278 | ||
11c1a207 RE |
279 | /* Nonzero if stack checking should be performed on entry to each function |
280 | which allocates temporary variables on the stack. */ | |
281 | #define ARM_FLAG_APCS_STACK (0x0040) | |
282 | ||
283 | /* Nonzero if floating point parameters should be passed to functions in | |
284 | floating point registers. */ | |
285 | #define ARM_FLAG_APCS_FLOAT (0x0080) | |
286 | ||
287 | /* Nonzero if re-entrant, position independent code should be generated. | |
288 | This is equivalent to -fpic. */ | |
289 | #define ARM_FLAG_APCS_REENT (0x0100) | |
290 | ||
291 | /* Nonzero if the MMU will trap unaligned word accesses, so shorts must be | |
292 | loaded byte-at-a-time. */ | |
293 | #define ARM_FLAG_SHORT_BYTE (0x0200) | |
294 | ||
295 | /* Nonzero if all floating point instructions are missing (and there is no | |
296 | emulator either). Generate function calls for all ops in this case. */ | |
297 | #define ARM_FLAG_SOFT_FLOAT (0x0400) | |
298 | ||
299 | /* Nonzero if we should compile with BYTES_BIG_ENDIAN set to 1. */ | |
300 | #define ARM_FLAG_BIG_END (0x0800) | |
301 | ||
302 | /* Nonzero if we should compile for Thumb interworking. */ | |
7e58a4d3 | 303 | #define ARM_FLAG_THUMB (0x1000) |
11c1a207 | 304 | |
ddee6aba RE |
305 | /* Nonzero if we should have little-endian words even when compiling for |
306 | big-endian (for backwards compatibility with older versions of GCC). */ | |
307 | #define ARM_FLAG_LITTLE_WORDS (0x2000) | |
308 | ||
f5a1b0d2 NC |
309 | /* Nonzero if we need to protect the prolog from scheduling */ |
310 | #define ARM_FLAG_NO_SCHED_PRO (0x4000) | |
311 | ||
c11145f6 CM |
312 | /* Nonzero if a call to abort should be generated if a noreturn |
313 | function tries to return. */ | |
314 | #define ARM_FLAG_ABORT_NORETURN (0x8000) | |
315 | ||
11c1a207 RE |
316 | #define TARGET_APCS (target_flags & ARM_FLAG_APCS_FRAME) |
317 | #define TARGET_POKE_FUNCTION_NAME (target_flags & ARM_FLAG_POKE) | |
318 | #define TARGET_FPE (target_flags & ARM_FLAG_FPE) | |
11c1a207 RE |
319 | #define TARGET_APCS_32 (target_flags & ARM_FLAG_APCS_32) |
320 | #define TARGET_APCS_STACK (target_flags & ARM_FLAG_APCS_STACK) | |
321 | #define TARGET_APCS_FLOAT (target_flags & ARM_FLAG_APCS_FLOAT) | |
322 | #define TARGET_APCS_REENT (target_flags & ARM_FLAG_APCS_REENT) | |
6cc8c0b3 | 323 | /* Note: TARGET_SHORT_BY_BYTES is really a misnomer. What it means is |
60d0536b | 324 | that short values should not be accessed using word load instructions |
6cc8c0b3 NC |
325 | as there is a possibility that they may not be word aligned and this |
326 | would generate an MMU fault. On processors which do not have a 16 bit | |
327 | load instruction therefore, short values must be loaded by individual | |
328 | byte accesses rather than loading a word and then shifting the desired | |
329 | value into place. */ | |
11c1a207 RE |
330 | #define TARGET_SHORT_BY_BYTES (target_flags & ARM_FLAG_SHORT_BYTE) |
331 | #define TARGET_SOFT_FLOAT (target_flags & ARM_FLAG_SOFT_FLOAT) | |
332 | #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT) | |
333 | #define TARGET_BIG_END (target_flags & ARM_FLAG_BIG_END) | |
334 | #define TARGET_THUMB_INTERWORK (target_flags & ARM_FLAG_THUMB) | |
ddee6aba | 335 | #define TARGET_LITTLE_WORDS (target_flags & ARM_FLAG_LITTLE_WORDS) |
f5a1b0d2 | 336 | #define TARGET_NO_SCHED_PRO (target_flags & ARM_FLAG_NO_SCHED_PRO) |
c11145f6 | 337 | #define TARGET_ABORT_NORETURN (target_flags & ARM_FLAG_ABORT_NORETURN) |
3ada8e17 DE |
338 | |
339 | /* SUBTARGET_SWITCHES is used to add flags on a per-config basis. | |
340 | Bit 31 is reserved. See riscix.h. */ | |
341 | #ifndef SUBTARGET_SWITCHES | |
342 | #define SUBTARGET_SWITCHES | |
ff9940b0 RE |
343 | #endif |
344 | ||
2ce9c1b9 RE |
345 | #define TARGET_SWITCHES \ |
346 | { \ | |
7e58a4d3 NC |
347 | {"apcs", ARM_FLAG_APCS_FRAME, "" }, \ |
348 | {"apcs-frame", ARM_FLAG_APCS_FRAME, \ | |
349 | "Generate APCS conformant stack frames" }, \ | |
350 | {"no-apcs-frame", -ARM_FLAG_APCS_FRAME, "" }, \ | |
351 | {"poke-function-name", ARM_FLAG_POKE, \ | |
352 | "Store function names in object code" }, \ | |
ef179a26 | 353 | {"no-poke-function-name", -ARM_FLAG_POKE, "" }, \ |
7e58a4d3 | 354 | {"fpe", ARM_FLAG_FPE, "" }, \ |
7e58a4d3 NC |
355 | {"apcs-32", ARM_FLAG_APCS_32, \ |
356 | "Use the 32bit version of the APCS" }, \ | |
357 | {"apcs-26", -ARM_FLAG_APCS_32, \ | |
358 | "Use the 26bit version of the APCS" }, \ | |
359 | {"apcs-stack-check", ARM_FLAG_APCS_STACK, "" }, \ | |
360 | {"no-apcs-stack-check", -ARM_FLAG_APCS_STACK, "" }, \ | |
361 | {"apcs-float", ARM_FLAG_APCS_FLOAT, \ | |
362 | "Pass FP arguments in FP registers" }, \ | |
363 | {"no-apcs-float", -ARM_FLAG_APCS_FLOAT, "" }, \ | |
364 | {"apcs-reentrant", ARM_FLAG_APCS_REENT, \ | |
365 | "Generate re-entrant, PIC code" }, \ | |
366 | {"no-apcs-reentrant", -ARM_FLAG_APCS_REENT, "" }, \ | |
367 | {"short-load-bytes", ARM_FLAG_SHORT_BYTE, \ | |
368 | "Load shorts a byte at a time" }, \ | |
369 | {"no-short-load-bytes", -ARM_FLAG_SHORT_BYTE, "" }, \ | |
370 | {"short-load-words", -ARM_FLAG_SHORT_BYTE, \ | |
371 | "Load words a byte at a time" }, \ | |
372 | {"no-short-load-words", ARM_FLAG_SHORT_BYTE, "" }, \ | |
373 | {"soft-float", ARM_FLAG_SOFT_FLOAT, \ | |
374 | "Use library calls to perform FP operations" }, \ | |
375 | {"hard-float", -ARM_FLAG_SOFT_FLOAT, \ | |
376 | "Use hardware floating point instructions" }, \ | |
377 | {"big-endian", ARM_FLAG_BIG_END, \ | |
378 | "Assume target CPU is configured as big endian" }, \ | |
379 | {"little-endian", -ARM_FLAG_BIG_END, \ | |
380 | "Assume target CPU is configured as little endian" }, \ | |
381 | {"words-little-endian", ARM_FLAG_LITTLE_WORDS, \ | |
382 | "Assume big endian bytes, little endian words" }, \ | |
383 | {"thumb-interwork", ARM_FLAG_THUMB, \ | |
384 | "Support calls between THUMB and ARM instructions sets" }, \ | |
385 | {"no-thumb-interwork", -ARM_FLAG_THUMB, "" }, \ | |
c11145f6 CM |
386 | {"abort-on-noreturn", ARM_FLAG_ABORT_NORETURN, \ |
387 | "Generate a call to abort if a noreturn function returns"}, \ | |
388 | {"no-abort-on-noreturn", -ARM_FLAG_ABORT_NORETURN, ""}, \ | |
f5a1b0d2 NC |
389 | {"sched-prolog", -ARM_FLAG_NO_SCHED_PRO, \ |
390 | "Do not move instructions into a function's prologue" }, \ | |
391 | {"no-sched-prolog", ARM_FLAG_NO_SCHED_PRO, "" }, \ | |
3ada8e17 | 392 | SUBTARGET_SWITCHES \ |
11c1a207 | 393 | {"", TARGET_DEFAULT } \ |
35d965d5 RS |
394 | } |
395 | ||
43cffd11 RE |
396 | #define TARGET_OPTIONS \ |
397 | { \ | |
f5a1b0d2 NC |
398 | {"cpu=", & arm_select[0].string, \ |
399 | "Specify the name of the target CPU" }, \ | |
400 | {"arch=", & arm_select[1].string, \ | |
401 | "Specify the name of the target architecture" }, \ | |
402 | {"tune=", & arm_select[2].string, "" }, \ | |
403 | {"fpe=", & target_fp_name, "" }, \ | |
404 | {"fp=", & target_fp_name, \ | |
405 | "Specify the version of the floating point emulator" }, \ | |
406 | { "structure-size-boundary=", & structure_size_string, \ | |
407 | "Specify the minumum bit alignment of structures" } \ | |
11c1a207 | 408 | } |
ff9940b0 | 409 | |
62dd06ea RE |
410 | struct arm_cpu_select |
411 | { | |
f9cc092a RE |
412 | const char * string; |
413 | const char * name; | |
414 | const struct processors * processors; | |
62dd06ea RE |
415 | }; |
416 | ||
f5a1b0d2 NC |
417 | /* This is a magic array. If the user specifies a command line switch |
418 | which matches one of the entries in TARGET_OPTIONS then the corresponding | |
419 | string pointer will be set to the value specified by the user. */ | |
62dd06ea RE |
420 | extern struct arm_cpu_select arm_select[]; |
421 | ||
11c1a207 RE |
422 | enum prog_mode_type |
423 | { | |
424 | prog_mode26, | |
425 | prog_mode32 | |
426 | }; | |
427 | ||
428 | /* Recast the program mode class to be the prog_mode attribute */ | |
429 | #define arm_prog_mode ((enum attr_prog_mode) arm_prgmode) | |
430 | ||
431 | extern enum prog_mode_type arm_prgmode; | |
432 | ||
433 | /* What sort of floating point unit do we have? Hardware or software. | |
434 | If software, is it issue 2 or issue 3? */ | |
24f0c1b4 RE |
435 | enum floating_point_type |
436 | { | |
437 | FP_HARD, | |
11c1a207 RE |
438 | FP_SOFT2, |
439 | FP_SOFT3 | |
24f0c1b4 RE |
440 | }; |
441 | ||
442 | /* Recast the floating point class to be the floating point attribute. */ | |
443 | #define arm_fpu_attr ((enum attr_fpu) arm_fpu) | |
444 | ||
71791e16 | 445 | /* What type of floating point to tune for */ |
24f0c1b4 RE |
446 | extern enum floating_point_type arm_fpu; |
447 | ||
71791e16 RE |
448 | /* What type of floating point instructions are available */ |
449 | extern enum floating_point_type arm_fpu_arch; | |
450 | ||
18543a22 | 451 | /* Default floating point architecture. Override in sub-target if |
71791e16 RE |
452 | necessary. */ |
453 | #define FP_DEFAULT FP_SOFT2 | |
454 | ||
11c1a207 RE |
455 | /* Nonzero if the processor has a fast multiply insn, and one that does |
456 | a 64-bit multiply of two 32-bit values. */ | |
457 | extern int arm_fast_multiply; | |
458 | ||
71791e16 | 459 | /* Nonzero if this chip supports the ARM Architecture 4 extensions */ |
11c1a207 RE |
460 | extern int arm_arch4; |
461 | ||
f5a1b0d2 NC |
462 | /* Nonzero if this chip can benefit from load scheduling. */ |
463 | extern int arm_ld_sched; | |
464 | ||
465 | /* Nonzero if this chip is a StrongARM. */ | |
466 | extern int arm_is_strong; | |
467 | ||
468 | /* Nonzero if this chip is a an ARM6 or an ARM7. */ | |
469 | extern int arm_is_6_or_7; | |
470 | ||
2ce9c1b9 | 471 | #ifndef TARGET_DEFAULT |
35d965d5 | 472 | #define TARGET_DEFAULT 0 |
2ce9c1b9 | 473 | #endif |
35d965d5 | 474 | |
11c1a207 RE |
475 | /* The frame pointer register used in gcc has nothing to do with debugging; |
476 | that is controlled by the APCS-FRAME option. */ | |
477 | /* Not fully implemented yet */ | |
478 | /* #define CAN_DEBUG_WITHOUT_FP 1 */ | |
35d965d5 | 479 | |
11c1a207 RE |
480 | #define TARGET_MEM_FUNCTIONS 1 |
481 | ||
482 | #define OVERRIDE_OPTIONS arm_override_options () | |
86efdc8e PB |
483 | |
484 | /* Nonzero if PIC code requires explicit qualifiers to generate | |
485 | PLT and GOT relocs rather than the assembler doing so implicitly. | |
486 | Subtargets can override this if required. */ | |
e2723c62 | 487 | #ifndef NEED_PLT_GOT |
86efdc8e | 488 | #define NEED_PLT_GOT 0 |
e2723c62 | 489 | #endif |
84306176 PB |
490 | |
491 | /* Nonzero if we need to refer to the GOT with a PC-relative | |
492 | offset. In other words, generate | |
493 | ||
494 | .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)] | |
495 | ||
496 | rather than | |
497 | ||
498 | .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8) | |
499 | ||
500 | The default is true, which matches NetBSD. Subtargets can | |
501 | override this if required. */ | |
502 | #ifndef GOT_PCREL | |
503 | #define GOT_PCREL 1 | |
504 | #endif | |
35d965d5 RS |
505 | \f |
506 | /* Target machine storage Layout. */ | |
507 | ||
ff9940b0 RE |
508 | |
509 | /* Define this macro if it is advisable to hold scalars in registers | |
510 | in a wider mode than that declared by the program. In such cases, | |
511 | the value is constrained to be within the bounds of the declared | |
512 | type, but kept valid in the wider mode. The signedness of the | |
513 | extension may differ from that of the type. */ | |
514 | ||
515 | /* It is far faster to zero extend chars than to sign extend them */ | |
516 | ||
517 | #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ | |
2ce9c1b9 RE |
518 | if (GET_MODE_CLASS (MODE) == MODE_INT \ |
519 | && GET_MODE_SIZE (MODE) < 4) \ | |
520 | { \ | |
521 | if (MODE == QImode) \ | |
522 | UNSIGNEDP = 1; \ | |
523 | else if (MODE == HImode) \ | |
524 | UNSIGNEDP = TARGET_SHORT_BY_BYTES != 0; \ | |
525 | (MODE) = SImode; \ | |
ff9940b0 RE |
526 | } |
527 | ||
18543a22 ILT |
528 | /* Define this macro if the promotion described by `PROMOTE_MODE' |
529 | should also be done for outgoing function arguments. */ | |
530 | /* This is required to ensure that push insns always push a word. */ | |
531 | #define PROMOTE_FUNCTION_ARGS | |
532 | ||
ff9940b0 RE |
533 | /* Define for XFmode extended real floating point support. |
534 | This will automatically cause REAL_ARITHMETIC to be defined. */ | |
535 | /* For the ARM: | |
536 | I think I have added all the code to make this work. Unfortunately, | |
537 | early releases of the floating point emulation code on RISCiX used a | |
538 | different format for extended precision numbers. On my RISCiX box there | |
539 | is a bug somewhere which causes the machine to lock up when running enquire | |
540 | with long doubles. There is the additional aspect that Norcroft C | |
541 | treats long doubles as doubles and we ought to remain compatible. | |
542 | Perhaps someone with an FPA coprocessor and not running RISCiX would like | |
543 | to try this someday. */ | |
544 | /* #define LONG_DOUBLE_TYPE_SIZE 96 */ | |
545 | ||
546 | /* Disable XFmode patterns in md file */ | |
547 | #define ENABLE_XF_PATTERNS 0 | |
548 | ||
549 | /* Define if you don't want extended real, but do want to use the | |
550 | software floating point emulator for REAL_ARITHMETIC and | |
551 | decimal <-> binary conversion. */ | |
552 | /* See comment above */ | |
553 | #define REAL_ARITHMETIC | |
554 | ||
35d965d5 RS |
555 | /* Define this if most significant bit is lowest numbered |
556 | in instructions that operate on numbered bit-fields. */ | |
557 | #define BITS_BIG_ENDIAN 0 | |
558 | ||
9c872872 | 559 | /* Define this if most significant byte of a word is the lowest numbered. |
3ada8e17 DE |
560 | Most ARM processors are run in little endian mode, so that is the default. |
561 | If you want to have it run-time selectable, change the definition in a | |
562 | cover file to be TARGET_BIG_ENDIAN. */ | |
11c1a207 | 563 | #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0) |
35d965d5 RS |
564 | |
565 | /* Define this if most significant word of a multiword number is the lowest | |
11c1a207 RE |
566 | numbered. |
567 | This is always false, even when in big-endian mode. */ | |
ddee6aba RE |
568 | #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS) |
569 | ||
570 | /* LIBGCC2_WORDS_BIG_ENDIAN has to be a constant, so we define this based | |
571 | on processor pre-defineds when compiling libgcc2.c. */ | |
572 | #if defined(__ARMEB__) && !defined(__ARMWEL__) | |
573 | #define LIBGCC2_WORDS_BIG_ENDIAN 1 | |
574 | #else | |
575 | #define LIBGCC2_WORDS_BIG_ENDIAN 0 | |
576 | #endif | |
35d965d5 | 577 | |
11c1a207 RE |
578 | /* Define this if most significant word of doubles is the lowest numbered. |
579 | This is always true, even when in little-endian mode. */ | |
7fc6c9f0 RK |
580 | #define FLOAT_WORDS_BIG_ENDIAN 1 |
581 | ||
b4ac57ab | 582 | /* Number of bits in an addressable storage unit */ |
35d965d5 RS |
583 | #define BITS_PER_UNIT 8 |
584 | ||
585 | #define BITS_PER_WORD 32 | |
586 | ||
587 | #define UNITS_PER_WORD 4 | |
588 | ||
589 | #define POINTER_SIZE 32 | |
590 | ||
591 | #define PARM_BOUNDARY 32 | |
592 | ||
593 | #define STACK_BOUNDARY 32 | |
594 | ||
595 | #define FUNCTION_BOUNDARY 32 | |
596 | ||
597 | #define EMPTY_FIELD_BOUNDARY 32 | |
598 | ||
599 | #define BIGGEST_ALIGNMENT 32 | |
600 | ||
ff9940b0 RE |
601 | /* Make strings word-aligned so strcpy from constants will be faster. */ |
602 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ | |
603 | (TREE_CODE (EXP) == STRING_CST \ | |
604 | && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) | |
605 | ||
b4ac57ab | 606 | /* Every structures size must be a multiple of 32 bits. */ |
7d94bb81 DE |
607 | /* This is for compatibility with ARMCC. ARM SDT Reference Manual |
608 | (ARM DUI 0020D) page 2-20 says "Structures are aligned on word | |
609 | boundaries". */ | |
b355a481 | 610 | #ifndef STRUCTURE_SIZE_BOUNDARY |
b4ac57ab | 611 | #define STRUCTURE_SIZE_BOUNDARY 32 |
b355a481 | 612 | #endif |
2a5307b1 | 613 | |
b355a481 | 614 | /* Used when parsing command line option -mstructure_size_boundary. */ |
f9cc092a | 615 | extern const char * structure_size_string; |
b4ac57ab | 616 | |
ff9940b0 RE |
617 | /* Non-zero if move instructions will actually fail to work |
618 | when given unaligned data. */ | |
35d965d5 RS |
619 | #define STRICT_ALIGNMENT 1 |
620 | ||
ff9940b0 RE |
621 | #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT |
622 | ||
35d965d5 RS |
623 | \f |
624 | /* Standard register usage. */ | |
625 | ||
626 | /* Register allocation in ARM Procedure Call Standard (as used on RISCiX): | |
627 | (S - saved over call). | |
628 | ||
629 | r0 * argument word/integer result | |
630 | r1-r3 argument word | |
631 | ||
632 | r4-r8 S register variable | |
633 | r9 S (rfp) register variable (real frame pointer) | |
f5a1b0d2 NC |
634 | |
635 | r10 F S (sl) stack limit (used by -mapcs-stack-check) | |
35d965d5 RS |
636 | r11 F S (fp) argument pointer |
637 | r12 (ip) temp workspace | |
638 | r13 F S (sp) lower end of current stack frame | |
639 | r14 (lr) link address/workspace | |
640 | r15 F (pc) program counter | |
641 | ||
642 | f0 floating point result | |
643 | f1-f3 floating point scratch | |
644 | ||
645 | f4-f7 S floating point variable | |
646 | ||
ff9940b0 RE |
647 | cc This is NOT a real register, but is used internally |
648 | to represent things that use or set the condition | |
649 | codes. | |
650 | sfp This isn't either. It is used during rtl generation | |
651 | since the offset between the frame pointer and the | |
652 | auto's isn't known until after register allocation. | |
653 | afp Nor this, we only need this because of non-local | |
654 | goto. Without it fp appears to be used and the | |
655 | elimination code won't get rid of sfp. It tracks | |
656 | fp exactly at all times. | |
657 | ||
35d965d5 RS |
658 | *: See CONDITIONAL_REGISTER_USAGE */ |
659 | ||
ff9940b0 RE |
660 | /* The stack backtrace structure is as follows: |
661 | fp points to here: | save code pointer | [fp] | |
662 | | return link value | [fp, #-4] | |
663 | | return sp value | [fp, #-8] | |
664 | | return fp value | [fp, #-12] | |
665 | [| saved r10 value |] | |
666 | [| saved r9 value |] | |
667 | [| saved r8 value |] | |
668 | [| saved r7 value |] | |
669 | [| saved r6 value |] | |
670 | [| saved r5 value |] | |
671 | [| saved r4 value |] | |
672 | [| saved r3 value |] | |
673 | [| saved r2 value |] | |
674 | [| saved r1 value |] | |
675 | [| saved r0 value |] | |
676 | [| saved f7 value |] three words | |
677 | [| saved f6 value |] three words | |
678 | [| saved f5 value |] three words | |
679 | [| saved f4 value |] three words | |
680 | r0-r3 are not normally saved in a C function. */ | |
681 | ||
682 | /* The number of hard registers is 16 ARM + 8 FPU + 1 CC + 1 SFP. */ | |
683 | #define FIRST_PSEUDO_REGISTER 27 | |
35d965d5 RS |
684 | |
685 | /* 1 for registers that have pervasive standard uses | |
686 | and are not available for the register allocator. */ | |
687 | #define FIXED_REGISTERS \ | |
688 | { \ | |
689 | 0,0,0,0,0,0,0,0, \ | |
6cc8c0b3 | 690 | 0,0,0,1,0,1,0,1, \ |
ff9940b0 RE |
691 | 0,0,0,0,0,0,0,0, \ |
692 | 1,1,1 \ | |
35d965d5 RS |
693 | } |
694 | ||
695 | /* 1 for registers not available across function calls. | |
696 | These must include the FIXED_REGISTERS and also any | |
697 | registers that can be used without being saved. | |
698 | The latter must include the registers where values are returned | |
699 | and the register where structure-value addresses are passed. | |
ff9940b0 RE |
700 | Aside from that, you can include as many other registers as you like. |
701 | The CC is not preserved over function calls on the ARM 6, so it is | |
702 | easier to assume this for all. SFP is preserved, since FP is. */ | |
35d965d5 RS |
703 | #define CALL_USED_REGISTERS \ |
704 | { \ | |
705 | 1,1,1,1,0,0,0,0, \ | |
6cc8c0b3 | 706 | 0,0,0,1,1,1,1,1, \ |
ff9940b0 RE |
707 | 1,1,1,1,0,0,0,0, \ |
708 | 1,1,1 \ | |
35d965d5 RS |
709 | } |
710 | ||
6cc8c0b3 NC |
711 | #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE |
712 | #define SUBTARGET_CONDITIONAL_REGISTER_USAGE | |
713 | #endif | |
714 | ||
35d965d5 RS |
715 | /* If doing stupid life analysis, avoid a bug causing a return value r0 to be |
716 | trampled. This effectively reduces the number of available registers by 1. | |
717 | XXX It is a hack, I know. | |
718 | XXX Is this still needed? */ | |
719 | #define CONDITIONAL_REGISTER_USAGE \ | |
3ada8e17 DE |
720 | { \ |
721 | if (obey_regdecls) \ | |
722 | fixed_regs[0] = 1; \ | |
723 | if (TARGET_SOFT_FLOAT) \ | |
724 | { \ | |
725 | int regno; \ | |
726 | for (regno = 16; regno < 24; ++regno) \ | |
727 | fixed_regs[regno] = call_used_regs[regno] = 1; \ | |
728 | } \ | |
7a801826 RE |
729 | if (flag_pic) \ |
730 | { \ | |
731 | fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ | |
6ed30148 | 732 | call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \ |
7a801826 | 733 | } \ |
6cc8c0b3 | 734 | else if (TARGET_APCS_STACK) \ |
f5a1b0d2 | 735 | { \ |
6cc8c0b3 NC |
736 | fixed_regs[10] = 1; \ |
737 | call_used_regs[10] = 1; \ | |
f5a1b0d2 | 738 | } \ |
6cc8c0b3 | 739 | SUBTARGET_CONDITIONAL_REGISTER_USAGE \ |
35d965d5 RS |
740 | } |
741 | ||
742 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
743 | to hold something of mode MODE. | |
744 | This is ordinarily the length in words of a value of mode MODE | |
745 | but can be less for certain modes in special long registers. | |
746 | ||
747 | On the ARM regs are UNITS_PER_WORD bits wide; FPU regs can hold any FP | |
748 | mode. */ | |
ff9940b0 RE |
749 | #define HARD_REGNO_NREGS(REGNO, MODE) \ |
750 | (((REGNO) >= 16 && REGNO != FRAME_POINTER_REGNUM \ | |
751 | && (REGNO) != ARG_POINTER_REGNUM) ? 1 \ | |
35d965d5 RS |
752 | : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) |
753 | ||
754 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. | |
755 | This is TRUE for ARM regs since they can hold anything, and TRUE for FPU | |
756 | regs holding FP. */ | |
ff9940b0 RE |
757 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ |
758 | ((GET_MODE_CLASS (MODE) == MODE_CC) ? (REGNO == CC_REGNUM) : \ | |
759 | ((REGNO) < 16 || REGNO == FRAME_POINTER_REGNUM \ | |
760 | || REGNO == ARG_POINTER_REGNUM \ | |
761 | || GET_MODE_CLASS (MODE) == MODE_FLOAT)) | |
35d965d5 RS |
762 | |
763 | /* Value is 1 if it is a good idea to tie two pseudo registers | |
764 | when one has mode MODE1 and one has mode MODE2. | |
765 | If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2, | |
766 | for any hard reg, then this must be 0 for correct output. */ | |
767 | #define MODES_TIEABLE_P(MODE1, MODE2) \ | |
3967692c | 768 | (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2)) |
35d965d5 RS |
769 | |
770 | /* Specify the registers used for certain standard purposes. | |
771 | The values of these macros are register numbers. */ | |
772 | ||
773 | /* Define this if the program counter is overloaded on a register. */ | |
774 | #define PC_REGNUM 15 | |
775 | ||
776 | /* Register to use for pushing function arguments. */ | |
777 | #define STACK_POINTER_REGNUM 13 | |
778 | ||
779 | /* Base register for access to local variables of the function. */ | |
ff9940b0 RE |
780 | #define FRAME_POINTER_REGNUM 25 |
781 | ||
782 | /* Define this to be where the real frame pointer is if it is not possible to | |
783 | work out the offset between the frame pointer and the automatic variables | |
784 | until after register allocation has taken place. FRAME_POINTER_REGNUM | |
785 | should point to a special register that we will make sure is eliminated. */ | |
786 | #define HARD_FRAME_POINTER_REGNUM 11 | |
35d965d5 RS |
787 | |
788 | /* Value should be nonzero if functions must have frame pointers. | |
789 | Zero means the frame pointer need not be set up (and parms may be accessed | |
ff9940b0 RE |
790 | via the stack pointer) in functions that seem suitable. |
791 | If we have to have a frame pointer we might as well make use of it. | |
792 | APCS says that the frame pointer does not need to be pushed in leaf | |
2a5307b1 | 793 | functions, or simple tail call functions. */ |
688743e7 RE |
794 | #define FRAME_POINTER_REQUIRED \ |
795 | (current_function_has_nonlocal_label || (TARGET_APCS && !leaf_function_p ())) | |
35d965d5 RS |
796 | |
797 | /* Base register for access to arguments of the function. */ | |
ff9940b0 | 798 | #define ARG_POINTER_REGNUM 26 |
35d965d5 RS |
799 | |
800 | /* The native (Norcroft) Pascal compiler for the ARM passes the static chain | |
801 | as an invisible last argument (possible since varargs don't exist in | |
802 | Pascal), so the following is not true. */ | |
803 | #define STATIC_CHAIN_REGNUM 8 | |
804 | ||
805 | /* Register in which address to store a structure value | |
806 | is passed to a function. */ | |
807 | #define STRUCT_VALUE_REGNUM 0 | |
808 | ||
ff9940b0 RE |
809 | /* Internal, so that we don't need to refer to a raw number */ |
810 | #define CC_REGNUM 24 | |
811 | ||
35d965d5 | 812 | /* The order in which register should be allocated. It is good to use ip |
ff9940b0 RE |
813 | since no saving is required (though calls clobber it) and it never contains |
814 | function parameters. It is quite good to use lr since other calls may | |
815 | clobber it anyway. Allocate r0 through r3 in reverse order since r3 is | |
816 | least likely to contain a function parameter; in addition results are | |
817 | returned in r0. | |
818 | */ | |
ff73fb53 | 819 | #define REG_ALLOC_ORDER \ |
35d965d5 | 820 | { \ |
ff73fb53 NC |
821 | 3, 2, 1, 0, 12, 14, 4, 5, \ |
822 | 6, 7, 8, 10, 9, 11, 13, 15, \ | |
ff9940b0 | 823 | 16, 17, 18, 19, 20, 21, 22, 23, \ |
ff73fb53 | 824 | 24, 25, 26 \ |
35d965d5 RS |
825 | } |
826 | \f | |
827 | /* Register and constant classes. */ | |
828 | ||
829 | /* Register classes: all ARM regs or all FPU regs---simple! */ | |
830 | enum reg_class | |
831 | { | |
832 | NO_REGS, | |
833 | FPU_REGS, | |
834 | GENERAL_REGS, | |
835 | ALL_REGS, | |
836 | LIM_REG_CLASSES | |
837 | }; | |
838 | ||
839 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
840 | ||
841 | /* Give names of register classes as strings for dump file. */ | |
842 | #define REG_CLASS_NAMES \ | |
843 | { \ | |
844 | "NO_REGS", \ | |
845 | "FPU_REGS", \ | |
846 | "GENERAL_REGS", \ | |
847 | "ALL_REGS", \ | |
848 | } | |
849 | ||
850 | /* Define which registers fit in which classes. | |
851 | This is an initializer for a vector of HARD_REG_SET | |
852 | of length N_REG_CLASSES. */ | |
aec3cfba NC |
853 | #define REG_CLASS_CONTENTS \ |
854 | { \ | |
855 | { 0x0000000 }, /* NO_REGS */ \ | |
856 | { 0x0FF0000 }, /* FPU_REGS */ \ | |
857 | { 0x200FFFF }, /* GENERAL_REGS */ \ | |
858 | { 0x2FFFFFF } /* ALL_REGS */ \ | |
35d965d5 RS |
859 | } |
860 | ||
861 | /* The same information, inverted: | |
862 | Return the class number of the smallest class containing | |
863 | reg number REGNO. This could be a conditional expression | |
864 | or could index an array. */ | |
ff9940b0 RE |
865 | #define REGNO_REG_CLASS(REGNO) \ |
866 | (((REGNO) < 16 || REGNO == FRAME_POINTER_REGNUM \ | |
867 | || REGNO == ARG_POINTER_REGNUM) \ | |
868 | ? GENERAL_REGS : (REGNO) == CC_REGNUM \ | |
869 | ? NO_REGS : FPU_REGS) | |
35d965d5 RS |
870 | |
871 | /* The class value for index registers, and the one for base regs. */ | |
872 | #define INDEX_REG_CLASS GENERAL_REGS | |
873 | #define BASE_REG_CLASS GENERAL_REGS | |
874 | ||
875 | /* Get reg_class from a letter such as appears in the machine description. | |
876 | We only need constraint `f' for FPU_REGS (`r' == GENERAL_REGS). */ | |
877 | #define REG_CLASS_FROM_LETTER(C) \ | |
878 | ((C)=='f' ? FPU_REGS : NO_REGS) | |
879 | ||
880 | /* The letters I, J, K, L and M in a register constraint string | |
881 | can be used to stand for particular ranges of immediate operands. | |
882 | This macro defines what the ranges are. | |
883 | C is the letter, and VALUE is a constant value. | |
884 | Return 1 if VALUE is in the range specified by C. | |
b4ac57ab | 885 | I: immediate arithmetic operand (i.e. 8 bits shifted as required). |
ff9940b0 | 886 | J: valid indexing constants. |
aef1764c | 887 | K: ~value ok in rhs argument of data operand. |
3967692c RE |
888 | L: -value ok in rhs argument of data operand. |
889 | M: 0..32, or a power of 2 (for shifts, or mult done by shift). */ | |
aef1764c RE |
890 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ |
891 | ((C) == 'I' ? const_ok_for_arm (VALUE) : \ | |
892 | (C) == 'J' ? ((VALUE) < 4096 && (VALUE) > -4096) : \ | |
893 | (C) == 'K' ? (const_ok_for_arm (~(VALUE))) : \ | |
3967692c RE |
894 | (C) == 'L' ? (const_ok_for_arm (-(VALUE))) : \ |
895 | (C) == 'M' ? (((VALUE >= 0 && VALUE <= 32)) \ | |
896 | || (((VALUE) & ((VALUE) - 1)) == 0)) \ | |
897 | : 0) | |
ff9940b0 RE |
898 | |
899 | /* For the ARM, `Q' means that this is a memory operand that is just | |
900 | an offset from a register. | |
901 | `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL | |
902 | address. This means that the symbol is in the text segment and can be | |
903 | accessed without using a load. */ | |
904 | ||
7a801826 RE |
905 | #define EXTRA_CONSTRAINT(OP, C) \ |
906 | ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG \ | |
907 | : (C) == 'R' ? (GET_CODE (OP) == MEM \ | |
908 | && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \ | |
909 | && CONSTANT_POOL_ADDRESS_P (XEXP (OP, 0))) \ | |
910 | : (C) == 'S' ? (optimize > 0 && CONSTANT_ADDRESS_P (OP)) \ | |
911 | : 0) | |
ff9940b0 RE |
912 | |
913 | /* Constant letter 'G' for the FPU immediate constants. | |
914 | 'H' means the same constant negated. */ | |
915 | #define CONST_DOUBLE_OK_FOR_LETTER_P(X,C) \ | |
916 | ((C) == 'G' ? const_double_rtx_ok_for_fpu (X) \ | |
917 | : (C) == 'H' ? neg_const_double_rtx_ok_for_fpu (X) : 0) | |
35d965d5 RS |
918 | |
919 | /* Given an rtx X being reloaded into a reg required to be | |
920 | in class CLASS, return the class of reg to actually use. | |
921 | In general this is just CLASS; but on some machines | |
922 | in some cases it is preferable to use a more restrictive class. */ | |
923 | #define PREFERRED_RELOAD_CLASS(X, CLASS) (CLASS) | |
924 | ||
ff9940b0 RE |
925 | /* Return the register class of a scratch register needed to copy IN into |
926 | or out of a register in CLASS in MODE. If it can be done directly, | |
927 | NO_REGS is returned. */ | |
11c1a207 RE |
928 | #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS,MODE,X) \ |
929 | (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \ | |
930 | ? GENERAL_REGS : NO_REGS) | |
ff9940b0 | 931 | |
2ce9c1b9 | 932 | /* If we need to load shorts byte-at-a-time, then we need a scratch. */ |
ed4c4348 | 933 | #define SECONDARY_INPUT_RELOAD_CLASS(CLASS,MODE,X) \ |
a2767b67 | 934 | (((MODE) == HImode && ! arm_arch4 && TARGET_SHORT_BY_BYTES \ |
ed4c4348 RE |
935 | && (GET_CODE (X) == MEM \ |
936 | || ((GET_CODE (X) == REG || GET_CODE (X) == SUBREG) \ | |
937 | && true_regnum (X) == -1))) \ | |
2ce9c1b9 RE |
938 | ? GENERAL_REGS : NO_REGS) |
939 | ||
6f734908 RE |
940 | /* Try a machine-dependent way of reloading an illegitimate address |
941 | operand. If we find one, push the reload and jump to WIN. This | |
942 | macro is used in only one place: `find_reloads_address' in reload.c. | |
943 | ||
944 | For the ARM, we wish to handle large displacements off a base | |
945 | register by splitting the addend across a MOV and the mem insn. | |
946 | This can cut the number of reloads needed. */ | |
947 | #define LEGITIMIZE_RELOAD_ADDRESS(X,MODE,OPNUM,TYPE,IND_LEVELS,WIN) \ | |
948 | do { \ | |
949 | if (GET_CODE (X) == PLUS \ | |
950 | && GET_CODE (XEXP (X, 0)) == REG \ | |
951 | && REGNO (XEXP (X, 0)) < FIRST_PSEUDO_REGISTER \ | |
952 | && REG_MODE_OK_FOR_BASE_P (XEXP (X, 0), MODE) \ | |
953 | && GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
954 | { \ | |
955 | HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \ | |
956 | HOST_WIDE_INT low, high; \ | |
957 | \ | |
958 | if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \ | |
959 | low = ((val & 0xf) ^ 0x8) - 0x8; \ | |
960 | else if (MODE == SImode || MODE == QImode \ | |
961 | || (MODE == SFmode && TARGET_SOFT_FLOAT) \ | |
962 | || (MODE == HImode && ! arm_arch4)) \ | |
963 | /* Need to be careful, -4096 is not a valid offset */ \ | |
964 | low = val >= 0 ? (val & 0xfff) : -((-val) & 0xfff); \ | |
965 | else if (MODE == HImode && arm_arch4) \ | |
966 | /* Need to be careful, -256 is not a valid offset */ \ | |
967 | low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \ | |
968 | else if (GET_MODE_CLASS (MODE) == MODE_FLOAT \ | |
969 | && TARGET_HARD_FLOAT) \ | |
970 | /* Need to be careful, -1024 is not a valid offset */ \ | |
971 | low = val >= 0 ? (val & 0x3ff) : -((-val) & 0x3ff); \ | |
972 | else \ | |
973 | break; \ | |
974 | \ | |
975 | high = ((((val - low) & 0xffffffff) ^ 0x80000000) - 0x80000000); \ | |
976 | /* Check for overflow or zero */ \ | |
977 | if (low == 0 || high == 0 || (high + low != val)) \ | |
978 | break; \ | |
979 | \ | |
980 | /* Reload the high part into a base reg; leave the low part \ | |
981 | in the mem. */ \ | |
982 | X = gen_rtx_PLUS (GET_MODE (X), \ | |
983 | gen_rtx_PLUS (GET_MODE (X), XEXP (X, 0), \ | |
984 | GEN_INT (high)), \ | |
985 | GEN_INT (low)); \ | |
986 | push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL_PTR, \ | |
987 | BASE_REG_CLASS, GET_MODE (X), VOIDmode, 0, 0, \ | |
988 | OPNUM, TYPE); \ | |
989 | goto WIN; \ | |
990 | } \ | |
991 | } while (0) | |
992 | ||
35d965d5 RS |
993 | /* Return the maximum number of consecutive registers |
994 | needed to represent mode MODE in a register of class CLASS. | |
995 | ARM regs are UNITS_PER_WORD bits while FPU regs can hold any FP mode */ | |
996 | #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
997 | ((CLASS) == FPU_REGS ? 1 \ | |
998 | : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) | |
999 | ||
ff9940b0 | 1000 | /* Moves between FPU_REGS and GENERAL_REGS are two memory insns. */ |
35d965d5 RS |
1001 | #define REGISTER_MOVE_COST(CLASS1, CLASS2) \ |
1002 | ((((CLASS1) == FPU_REGS && (CLASS2) != FPU_REGS) \ | |
1003 | || ((CLASS2) == FPU_REGS && (CLASS1) != FPU_REGS)) \ | |
ff9940b0 | 1004 | ? 20 : 2) |
35d965d5 RS |
1005 | \f |
1006 | /* Stack layout; function entry, exit and calling. */ | |
1007 | ||
1008 | /* Define this if pushing a word on the stack | |
1009 | makes the stack pointer a smaller address. */ | |
1010 | #define STACK_GROWS_DOWNWARD 1 | |
1011 | ||
1012 | /* Define this if the nominal address of the stack frame | |
1013 | is at the high-address end of the local variables; | |
1014 | that is, each additional local variable allocated | |
1015 | goes at a more negative offset in the frame. */ | |
1016 | #define FRAME_GROWS_DOWNWARD 1 | |
1017 | ||
1018 | /* Offset within stack frame to start allocating local variables at. | |
1019 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
1020 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
1021 | of the first local allocated. */ | |
1022 | #define STARTING_FRAME_OFFSET 0 | |
1023 | ||
1024 | /* If we generate an insn to push BYTES bytes, | |
1025 | this says how many the stack pointer really advances by. */ | |
18543a22 ILT |
1026 | /* The push insns do not do this rounding implicitly. So don't define this. */ |
1027 | /* #define PUSH_ROUNDING(NPUSHED) (((NPUSHED) + 3) & ~3) */ | |
1028 | ||
1029 | /* Define this if the maximum size of all the outgoing args is to be | |
1030 | accumulated and pushed during the prologue. The amount can be | |
1031 | found in the variable current_function_outgoing_args_size. */ | |
1032 | #define ACCUMULATE_OUTGOING_ARGS | |
35d965d5 RS |
1033 | |
1034 | /* Offset of first parameter from the argument pointer register value. */ | |
1035 | #define FIRST_PARM_OFFSET(FNDECL) 4 | |
1036 | ||
1037 | /* Value is the number of byte of arguments automatically | |
1038 | popped when returning from a subroutine call. | |
8b109b37 | 1039 | FUNDECL is the declaration node of the function (as a tree), |
35d965d5 RS |
1040 | FUNTYPE is the data type of the function (as a tree), |
1041 | or for a library call it is an identifier node for the subroutine name. | |
1042 | SIZE is the number of bytes of arguments passed on the stack. | |
1043 | ||
1044 | On the ARM, the caller does not pop any of its arguments that were passed | |
1045 | on the stack. */ | |
8b109b37 | 1046 | #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0 |
35d965d5 RS |
1047 | |
1048 | /* Define how to find the value returned by a function. | |
1049 | VALTYPE is the data type of the value (as a tree). | |
1050 | If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
1051 | otherwise, FUNC is 0. */ | |
1052 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
3ada8e17 | 1053 | (GET_MODE_CLASS (TYPE_MODE (VALTYPE)) == MODE_FLOAT && TARGET_HARD_FLOAT \ |
43cffd11 RE |
1054 | ? gen_rtx_REG (TYPE_MODE (VALTYPE), 16) \ |
1055 | : gen_rtx_REG (TYPE_MODE (VALTYPE), 0)) | |
35d965d5 RS |
1056 | |
1057 | /* Define how to find the value returned by a library function | |
1058 | assuming the value has mode MODE. */ | |
1059 | #define LIBCALL_VALUE(MODE) \ | |
3ada8e17 | 1060 | (GET_MODE_CLASS (MODE) == MODE_FLOAT && TARGET_HARD_FLOAT \ |
43cffd11 RE |
1061 | ? gen_rtx_REG (MODE, 16) \ |
1062 | : gen_rtx_REG (MODE, 0)) | |
35d965d5 RS |
1063 | |
1064 | /* 1 if N is a possible register number for a function value. | |
1065 | On the ARM, only r0 and f0 can return results. */ | |
1066 | #define FUNCTION_VALUE_REGNO_P(REGNO) \ | |
aec3cfba | 1067 | ((REGNO) == 0 || (((REGNO) == 16) && TARGET_HARD_FLOAT)) |
35d965d5 | 1068 | |
11c1a207 RE |
1069 | /* How large values are returned */ |
1070 | /* A C expression which can inhibit the returning of certain function values | |
1071 | in registers, based on the type of value. */ | |
f5a1b0d2 | 1072 | #define RETURN_IN_MEMORY(TYPE) arm_return_in_memory (TYPE) |
11c1a207 RE |
1073 | |
1074 | /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return | |
1075 | values must be in memory. On the ARM, they need only do so if larger | |
1076 | than a word, or if they contain elements offset from zero in the struct. */ | |
1077 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
1078 | ||
35d965d5 RS |
1079 | /* Define where to put the arguments to a function. |
1080 | Value is zero to push the argument on the stack, | |
1081 | or a hard register in which to store the argument. | |
1082 | ||
1083 | MODE is the argument's machine mode. | |
1084 | TYPE is the data type of the argument (as a tree). | |
1085 | This is null for libcalls where that information may | |
1086 | not be available. | |
1087 | CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
1088 | the preceding args and about the function being called. | |
1089 | NAMED is nonzero if this argument is a named parameter | |
1090 | (otherwise it is an extra parameter matching an ellipsis). | |
1091 | ||
1092 | On the ARM, normally the first 16 bytes are passed in registers r0-r3; all | |
1093 | other arguments are passed on the stack. If (NAMED == 0) (which happens | |
1094 | only in assign_parms, since SETUP_INCOMING_VARARGS is defined), say it is | |
1095 | passed in the stack (function_prologue will indeed make it pass in the | |
1096 | stack if necessary). */ | |
1097 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
1098 | ((NAMED) \ | |
43cffd11 | 1099 | ? ((CUM) >= 16 ? 0 : gen_rtx_REG (MODE, (CUM) / 4)) \ |
35d965d5 RS |
1100 | : 0) |
1101 | ||
1102 | /* For an arg passed partly in registers and partly in memory, | |
1103 | this is the number of registers used. | |
1104 | For args passed entirely in registers or entirely in memory, zero. */ | |
1105 | #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ | |
1106 | ((CUM) < 16 && 16 < (CUM) + ((MODE) != BLKmode \ | |
1107 | ? GET_MODE_SIZE (MODE) \ | |
1108 | : int_size_in_bytes (TYPE)) \ | |
1109 | ? 4 - (CUM) / 4 : 0) | |
1110 | ||
1111 | /* A C type for declaring a variable that is used as the first argument of | |
1112 | `FUNCTION_ARG' and other related values. For some target machines, the | |
1113 | type `int' suffices and can hold the number of bytes of argument so far. | |
1114 | ||
1115 | On the ARM, this is the number of bytes of arguments scanned so far. */ | |
1116 | #define CUMULATIVE_ARGS int | |
1117 | ||
1118 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
1119 | for a call to a function whose data type is FNTYPE. | |
1120 | For a library call, FNTYPE is 0. | |
1121 | On the ARM, the offset starts at 0. */ | |
2c7ee1a6 | 1122 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \ |
ff9940b0 | 1123 | ((CUM) = (((FNTYPE) && aggregate_value_p (TREE_TYPE ((FNTYPE)))) ? 4 : 0)) |
35d965d5 RS |
1124 | |
1125 | /* Update the data in CUM to advance over an argument | |
1126 | of mode MODE and data type TYPE. | |
1127 | (TYPE is null for libcalls where that information may not be available.) */ | |
1128 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
1129 | (CUM) += ((MODE) != BLKmode \ | |
1130 | ? (GET_MODE_SIZE (MODE) + 3) & ~3 \ | |
1131 | : (int_size_in_bytes (TYPE) + 3) & ~3) \ | |
1132 | ||
1133 | /* 1 if N is a possible register number for function argument passing. | |
1134 | On the ARM, r0-r3 are used to pass args. */ | |
1135 | #define FUNCTION_ARG_REGNO_P(REGNO) \ | |
1136 | ((REGNO) >= 0 && (REGNO) <= 3) | |
1137 | ||
1138 | /* Perform any actions needed for a function that is receiving a variable | |
1139 | number of arguments. CUM is as above. MODE and TYPE are the mode and type | |
1140 | of the current parameter. PRETEND_SIZE is a variable that should be set to | |
1141 | the amount of stack that must be pushed by the prolog to pretend that our | |
1142 | caller pushed it. | |
1143 | ||
1144 | Normally, this macro will push all remaining incoming registers on the | |
1145 | stack and set PRETEND_SIZE to the length of the registers pushed. | |
1146 | ||
1147 | On the ARM, PRETEND_SIZE is set in order to have the prologue push the last | |
1148 | named arg and all anonymous args onto the stack. | |
1149 | XXX I know the prologue shouldn't be pushing registers, but it is faster | |
1150 | that way. */ | |
1151 | #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PRETEND_SIZE, NO_RTL) \ | |
1152 | { \ | |
1153 | extern int current_function_anonymous_args; \ | |
1154 | current_function_anonymous_args = 1; \ | |
1155 | if ((CUM) < 16) \ | |
1156 | (PRETEND_SIZE) = 16 - (CUM); \ | |
1157 | } | |
1158 | ||
1159 | /* Generate assembly output for the start of a function. */ | |
1160 | #define FUNCTION_PROLOGUE(STREAM, SIZE) \ | |
008cf58a | 1161 | output_func_prologue ((STREAM), (SIZE)) |
35d965d5 | 1162 | |
afef3d7a NC |
1163 | /* If your target environment doesn't prefix user functions with an |
1164 | underscore, you may wish to re-define this to prevent any conflicts. | |
1165 | e.g. AOF may prefix mcount with an underscore. */ | |
1166 | #ifndef ARM_MCOUNT_NAME | |
1167 | #define ARM_MCOUNT_NAME "*mcount" | |
1168 | #endif | |
1169 | ||
1170 | /* Call the function profiler with a given profile label. The Acorn | |
1171 | compiler puts this BEFORE the prolog but gcc puts it afterwards. | |
1172 | On the ARM the full profile code will look like: | |
1173 | .data | |
1174 | LP1 | |
1175 | .word 0 | |
1176 | .text | |
1177 | mov ip, lr | |
1178 | bl mcount | |
1179 | .word LP1 | |
1180 | ||
1181 | profile_function() in final.c outputs the .data section, FUNCTION_PROFILER | |
1182 | will output the .text section. | |
1183 | ||
1184 | The ``mov ip,lr'' seems like a good idea to stick with cc convention. | |
1185 | ``prof'' doesn't seem to mind about this! */ | |
4eda77ec RE |
1186 | #define FUNCTION_PROFILER(STREAM,LABELNO) \ |
1187 | { \ | |
afef3d7a NC |
1188 | char temp[20]; \ |
1189 | rtx sym; \ | |
1190 | \ | |
1191 | fprintf ((STREAM), "\tmov\t%s%s, %s%s\n\tbl\t", \ | |
1192 | REGISTER_PREFIX, reg_names[12] /* ip */, \ | |
1193 | REGISTER_PREFIX, reg_names[14] /* lr */); \ | |
1194 | assemble_name ((STREAM), ARM_MCOUNT_NAME); \ | |
1195 | fputc ('\n', (STREAM)); \ | |
1196 | ASM_GENERATE_INTERNAL_LABEL (temp, "LP", (LABELNO)); \ | |
1197 | sym = gen_rtx (SYMBOL_REF, Pmode, temp); \ | |
1198 | ASM_OUTPUT_INT ((STREAM), sym); \ | |
35d965d5 RS |
1199 | } |
1200 | ||
1201 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
1202 | the stack pointer does not matter. The value is tested only in | |
1203 | functions that have frame pointers. | |
1204 | No definition is equivalent to always zero. | |
1205 | ||
1206 | On the ARM, the function epilogue recovers the stack pointer from the | |
1207 | frame. */ | |
1208 | #define EXIT_IGNORE_STACK 1 | |
1209 | ||
1210 | /* Generate the assembly code for function exit. */ | |
1211 | #define FUNCTION_EPILOGUE(STREAM, SIZE) \ | |
008cf58a | 1212 | output_func_epilogue ((STREAM), (SIZE)) |
35d965d5 RS |
1213 | |
1214 | /* Determine if the epilogue should be output as RTL. | |
1215 | You should override this if you define FUNCTION_EXTRA_EPILOGUE. */ | |
b36ba79f | 1216 | #define USE_RETURN_INSN(ISCOND) use_return_insn (ISCOND) |
ff9940b0 RE |
1217 | |
1218 | /* Definitions for register eliminations. | |
1219 | ||
1220 | This is an array of structures. Each structure initializes one pair | |
1221 | of eliminable registers. The "from" register number is given first, | |
1222 | followed by "to". Eliminations of the same "from" register are listed | |
1223 | in order of preference. | |
1224 | ||
1225 | We have two registers that can be eliminated on the ARM. First, the | |
1226 | arg pointer register can often be eliminated in favor of the stack | |
1227 | pointer register. Secondly, the pseudo frame pointer register can always | |
1228 | be eliminated; it is replaced with either the stack or the real frame | |
1229 | pointer. */ | |
1230 | ||
1231 | #define ELIMINABLE_REGS \ | |
1232 | {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1233 | {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
1234 | {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1235 | {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} | |
1236 | ||
1237 | /* Given FROM and TO register numbers, say whether this elimination is allowed. | |
1238 | Frame pointer elimination is automatically handled. | |
1239 | ||
1240 | All eliminations are permissible. Note that ARG_POINTER_REGNUM and | |
abc95ed3 | 1241 | HARD_FRAME_POINTER_REGNUM are in fact the same thing. If we need a frame |
ff9940b0 RE |
1242 | pointer, we must eliminate FRAME_POINTER_REGNUM into |
1243 | HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM. */ | |
1244 | #define CAN_ELIMINATE(FROM, TO) \ | |
1245 | (((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : 1) | |
1246 | ||
1247 | /* Define the offset between two registers, one to be eliminated, and the other | |
1248 | its replacement, at the start of a routine. */ | |
1249 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
1250 | { \ | |
3967692c | 1251 | int volatile_func = arm_volatile_func (); \ |
ff9940b0 RE |
1252 | if ((FROM) == ARG_POINTER_REGNUM && (TO) == HARD_FRAME_POINTER_REGNUM)\ |
1253 | (OFFSET) = 0; \ | |
18543a22 ILT |
1254 | else if ((FROM) == FRAME_POINTER_REGNUM \ |
1255 | && (TO) == STACK_POINTER_REGNUM) \ | |
1256 | (OFFSET) = (current_function_outgoing_args_size \ | |
aec3cfba | 1257 | + ((get_frame_size () + 3) & ~3)); \ |
ff9940b0 RE |
1258 | else \ |
1259 | { \ | |
1260 | int regno; \ | |
1261 | int offset = 12; \ | |
008cf58a | 1262 | int saved_hard_reg = 0; \ |
ff9940b0 | 1263 | \ |
3967692c RE |
1264 | if (! volatile_func) \ |
1265 | { \ | |
1266 | for (regno = 0; regno <= 10; regno++) \ | |
1267 | if (regs_ever_live[regno] && ! call_used_regs[regno]) \ | |
1268 | saved_hard_reg = 1, offset += 4; \ | |
6ed30148 RE |
1269 | /* PIC register is a fixed reg, so call_used_regs set. */ \ |
1270 | if (flag_pic && regs_ever_live[PIC_OFFSET_TABLE_REGNUM]) \ | |
1271 | saved_hard_reg = 1, offset += 4; \ | |
3967692c RE |
1272 | for (regno = 16; regno <=23; regno++) \ |
1273 | if (regs_ever_live[regno] && ! call_used_regs[regno]) \ | |
1274 | offset += 12; \ | |
1275 | } \ | |
ff9940b0 RE |
1276 | if ((FROM) == FRAME_POINTER_REGNUM) \ |
1277 | (OFFSET) = -offset; \ | |
1278 | else \ | |
1279 | { \ | |
bd4d60ce | 1280 | if (! frame_pointer_needed) \ |
ff9940b0 | 1281 | offset -= 16; \ |
18543a22 ILT |
1282 | if (! volatile_func \ |
1283 | && (regs_ever_live[14] || saved_hard_reg)) \ | |
ff9940b0 | 1284 | offset += 4; \ |
18543a22 | 1285 | offset += current_function_outgoing_args_size; \ |
aec3cfba | 1286 | (OFFSET) = ((get_frame_size () + 3) & ~3) + offset; \ |
ff9940b0 RE |
1287 | } \ |
1288 | } \ | |
1289 | } | |
35d965d5 | 1290 | |
35d965d5 RS |
1291 | /* Output assembler code for a block containing the constant parts |
1292 | of a trampoline, leaving space for the variable parts. | |
1293 | ||
1294 | On the ARM, (if r8 is the static chain regnum, and remembering that | |
1295 | referencing pc adds an offset of 8) the trampoline looks like: | |
1296 | ldr r8, [pc, #0] | |
1297 | ldr pc, [pc] | |
1298 | .word static chain value | |
11c1a207 RE |
1299 | .word function's address |
1300 | ??? FIXME: When the trampoline returns, r8 will be clobbered. */ | |
4eda77ec RE |
1301 | #define TRAMPOLINE_TEMPLATE(FILE) \ |
1302 | { \ | |
afef3d7a NC |
1303 | fprintf ((FILE), "\tldr\t%s%s, [%s%s, #0]\n", \ |
1304 | REGISTER_PREFIX, reg_names[STATIC_CHAIN_REGNUM], \ | |
1305 | REGISTER_PREFIX, reg_names[PC_REGNUM]); \ | |
1306 | fprintf ((FILE), "\tldr\t%s%s, [%s%s, #0]\n", \ | |
1307 | REGISTER_PREFIX, reg_names[PC_REGNUM], \ | |
1308 | REGISTER_PREFIX, reg_names[PC_REGNUM]); \ | |
1309 | ASM_OUTPUT_INT ((FILE), const0_rtx); \ | |
1310 | ASM_OUTPUT_INT ((FILE), const0_rtx); \ | |
35d965d5 RS |
1311 | } |
1312 | ||
1313 | /* Length in units of the trampoline for entering a nested function. */ | |
1314 | #define TRAMPOLINE_SIZE 16 | |
1315 | ||
1316 | /* Alignment required for a trampoline in units. */ | |
1317 | #define TRAMPOLINE_ALIGN 4 | |
1318 | ||
1319 | /* Emit RTL insns to initialize the variable parts of a trampoline. | |
1320 | FNADDR is an RTX for the address of the function's pure code. | |
1321 | CXT is an RTX for the static chain value for the function. */ | |
1322 | #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ | |
1323 | { \ | |
43cffd11 | 1324 | emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 8)), \ |
35d965d5 | 1325 | (CXT)); \ |
43cffd11 | 1326 | emit_move_insn (gen_rtx_MEM (SImode, plus_constant ((TRAMP), 12)), \ |
35d965d5 RS |
1327 | (FNADDR)); \ |
1328 | } | |
1329 | ||
35d965d5 RS |
1330 | \f |
1331 | /* Addressing modes, and classification of registers for them. */ | |
1332 | ||
1333 | #define HAVE_POST_INCREMENT 1 | |
1334 | #define HAVE_PRE_INCREMENT 1 | |
1335 | #define HAVE_POST_DECREMENT 1 | |
1336 | #define HAVE_PRE_DECREMENT 1 | |
1337 | ||
1338 | /* Macros to check register numbers against specific register classes. */ | |
1339 | ||
1340 | /* These assume that REGNO is a hard or pseudo reg number. | |
1341 | They give nonzero only if REGNO is a hard reg of the suitable class | |
1342 | or a pseudo reg currently allocated to a suitable hard reg. | |
1343 | Since they use reg_renumber, they are safe only once reg_renumber | |
1344 | has been allocated, which happens in local-alloc.c. | |
1345 | ||
1346 | On the ARM, don't allow the pc to be used. */ | |
ff9940b0 RE |
1347 | #define REGNO_OK_FOR_BASE_P(REGNO) \ |
1348 | ((REGNO) < 15 || (REGNO) == FRAME_POINTER_REGNUM \ | |
1349 | || (REGNO) == ARG_POINTER_REGNUM \ | |
1350 | || (unsigned) reg_renumber[(REGNO)] < 15 \ | |
1351 | || (unsigned) reg_renumber[(REGNO)] == FRAME_POINTER_REGNUM \ | |
1352 | || (unsigned) reg_renumber[(REGNO)] == ARG_POINTER_REGNUM) | |
1353 | #define REGNO_OK_FOR_INDEX_P(REGNO) \ | |
35d965d5 RS |
1354 | REGNO_OK_FOR_BASE_P(REGNO) |
1355 | ||
1356 | /* Maximum number of registers that can appear in a valid memory address. | |
ff9940b0 RE |
1357 | Shifts in addresses can't be by a register. */ |
1358 | ||
1359 | #define MAX_REGS_PER_ADDRESS 2 | |
35d965d5 RS |
1360 | |
1361 | /* Recognize any constant value that is a valid address. */ | |
1362 | /* XXX We can address any constant, eventually... */ | |
11c1a207 RE |
1363 | |
1364 | #ifdef AOF_ASSEMBLER | |
1365 | ||
1366 | #define CONSTANT_ADDRESS_P(X) \ | |
1367 | (GET_CODE (X) == SYMBOL_REF \ | |
1368 | && CONSTANT_POOL_ADDRESS_P (X)) | |
1369 | ||
1370 | #else | |
35d965d5 | 1371 | |
008cf58a RE |
1372 | #define CONSTANT_ADDRESS_P(X) \ |
1373 | (GET_CODE (X) == SYMBOL_REF \ | |
1374 | && (CONSTANT_POOL_ADDRESS_P (X) \ | |
1375 | || (optimize > 0 && SYMBOL_REF_FLAG (X)))) | |
35d965d5 | 1376 | |
11c1a207 RE |
1377 | #endif /* AOF_ASSEMBLER */ |
1378 | ||
35d965d5 RS |
1379 | /* Nonzero if the constant value X is a legitimate general operand. |
1380 | It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. | |
1381 | ||
1382 | On the ARM, allow any integer (invalid ones are removed later by insn | |
1383 | patterns), nice doubles and symbol_refs which refer to the function's | |
1384 | constant pool XXX. */ | |
11c1a207 | 1385 | #define LEGITIMATE_CONSTANT_P(X) (! label_mentioned_p (X)) |
ff9940b0 RE |
1386 | |
1387 | /* Symbols in the text segment can be accessed without indirecting via the | |
1388 | constant pool; it may take an extra binary operation, but this is still | |
008cf58a RE |
1389 | faster than indirecting via memory. Don't do this when not optimizing, |
1390 | since we won't be calculating al of the offsets necessary to do this | |
1391 | simplification. */ | |
11c1a207 RE |
1392 | /* This doesn't work with AOF syntax, since the string table may be in |
1393 | a different AREA. */ | |
1394 | #ifndef AOF_ASSEMBLER | |
ff9940b0 RE |
1395 | #define ENCODE_SECTION_INFO(decl) \ |
1396 | { \ | |
008cf58a | 1397 | if (optimize > 0 && TREE_CONSTANT (decl) \ |
ff9940b0 | 1398 | && (!flag_writable_strings || TREE_CODE (decl) != STRING_CST)) \ |
228b6a3f RS |
1399 | { \ |
1400 | rtx rtl = (TREE_CODE_CLASS (TREE_CODE (decl)) != 'd' \ | |
1401 | ? TREE_CST_RTL (decl) : DECL_RTL (decl)); \ | |
1402 | SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1; \ | |
1403 | } \ | |
ff9940b0 | 1404 | } |
11c1a207 | 1405 | #endif |
7a801826 | 1406 | |
35d965d5 RS |
1407 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx |
1408 | and check its validity for a certain class. | |
1409 | We have two alternate definitions for each of them. | |
1410 | The usual definition accepts all pseudo regs; the other rejects | |
1411 | them unless they have been allocated suitable hard regs. | |
1412 | The symbol REG_OK_STRICT causes the latter definition to be used. */ | |
1413 | #ifndef REG_OK_STRICT | |
ff9940b0 | 1414 | |
35d965d5 RS |
1415 | /* Nonzero if X is a hard reg that can be used as a base reg |
1416 | or if it is a pseudo reg. */ | |
ff9940b0 RE |
1417 | #define REG_OK_FOR_BASE_P(X) \ |
1418 | (REGNO (X) < 16 || REGNO (X) >= FIRST_PSEUDO_REGISTER \ | |
1419 | || REGNO (X) == FRAME_POINTER_REGNUM || REGNO (X) == ARG_POINTER_REGNUM) | |
1420 | ||
35d965d5 RS |
1421 | /* Nonzero if X is a hard reg that can be used as an index |
1422 | or if it is a pseudo reg. */ | |
1423 | #define REG_OK_FOR_INDEX_P(X) \ | |
1424 | REG_OK_FOR_BASE_P(X) | |
ff9940b0 RE |
1425 | |
1426 | #define REG_OK_FOR_PRE_POST_P(X) \ | |
1427 | (REGNO (X) < 16 || REGNO (X) >= FIRST_PSEUDO_REGISTER \ | |
1428 | || REGNO (X) == FRAME_POINTER_REGNUM || REGNO (X) == ARG_POINTER_REGNUM) | |
1429 | ||
35d965d5 | 1430 | #else |
ff9940b0 | 1431 | |
35d965d5 RS |
1432 | /* Nonzero if X is a hard reg that can be used as a base reg. */ |
1433 | #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
ff9940b0 | 1434 | |
35d965d5 RS |
1435 | /* Nonzero if X is a hard reg that can be used as an index. */ |
1436 | #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X)) | |
ff9940b0 RE |
1437 | |
1438 | #define REG_OK_FOR_PRE_POST_P(X) \ | |
1439 | (REGNO (X) < 16 || (unsigned) reg_renumber[REGNO (X)] < 16 \ | |
1440 | || REGNO (X) == FRAME_POINTER_REGNUM || REGNO (X) == ARG_POINTER_REGNUM \ | |
1441 | || (unsigned) reg_renumber[REGNO (X)] == FRAME_POINTER_REGNUM \ | |
1442 | || (unsigned) reg_renumber[REGNO (X)] == ARG_POINTER_REGNUM) | |
1443 | ||
35d965d5 RS |
1444 | #endif |
1445 | \f | |
1446 | /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression | |
1447 | that is a valid memory address for an instruction. | |
1448 | The MODE argument is the machine mode for the MEM expression | |
1449 | that wants to use this address. | |
1450 | ||
1451 | The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS. */ | |
1452 | #define BASE_REGISTER_RTX_P(X) \ | |
1453 | (GET_CODE (X) == REG && REG_OK_FOR_BASE_P (X)) | |
1454 | ||
1455 | #define INDEX_REGISTER_RTX_P(X) \ | |
1456 | (GET_CODE (X) == REG && REG_OK_FOR_INDEX_P (X)) | |
1457 | ||
1458 | /* A C statement (sans semicolon) to jump to LABEL for legitimate index RTXs | |
1459 | used by the macro GO_IF_LEGITIMATE_ADDRESS. Floating point indices can | |
1460 | only be small constants. */ | |
ff9940b0 | 1461 | #define GO_IF_LEGITIMATE_INDEX(MODE, BASE_REGNO, INDEX, LABEL) \ |
4d01c30f RS |
1462 | do \ |
1463 | { \ | |
008cf58a RE |
1464 | HOST_WIDE_INT range; \ |
1465 | enum rtx_code code = GET_CODE (INDEX); \ | |
4d01c30f | 1466 | \ |
11c1a207 | 1467 | if (TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT) \ |
ff9940b0 RE |
1468 | { \ |
1469 | if (code == CONST_INT && INTVAL (INDEX) < 1024 \ | |
1470 | && INTVAL (INDEX) > -1024 \ | |
1471 | && (INTVAL (INDEX) & 3) == 0) \ | |
1472 | goto LABEL; \ | |
1473 | } \ | |
4d01c30f RS |
1474 | else \ |
1475 | { \ | |
ff9940b0 | 1476 | if (INDEX_REGISTER_RTX_P (INDEX) && GET_MODE_SIZE (MODE) <= 4) \ |
4d01c30f | 1477 | goto LABEL; \ |
11c1a207 RE |
1478 | if (GET_MODE_SIZE (MODE) <= 4 && code == MULT \ |
1479 | && (! arm_arch4 || (MODE) != HImode)) \ | |
4d01c30f RS |
1480 | { \ |
1481 | rtx xiop0 = XEXP (INDEX, 0); \ | |
1482 | rtx xiop1 = XEXP (INDEX, 1); \ | |
1483 | if (INDEX_REGISTER_RTX_P (xiop0) \ | |
1484 | && power_of_two_operand (xiop1, SImode)) \ | |
1485 | goto LABEL; \ | |
1486 | if (INDEX_REGISTER_RTX_P (xiop1) \ | |
1487 | && power_of_two_operand (xiop0, SImode)) \ | |
1488 | goto LABEL; \ | |
1489 | } \ | |
ff9940b0 | 1490 | if (GET_MODE_SIZE (MODE) <= 4 \ |
996a5f59 | 1491 | && (code == LSHIFTRT || code == ASHIFTRT \ |
11c1a207 RE |
1492 | || code == ASHIFT || code == ROTATERT) \ |
1493 | && (! arm_arch4 || (MODE) != HImode)) \ | |
ff9940b0 RE |
1494 | { \ |
1495 | rtx op = XEXP (INDEX, 1); \ | |
1496 | if (INDEX_REGISTER_RTX_P (XEXP (INDEX, 0)) \ | |
1497 | && GET_CODE (op) == CONST_INT && INTVAL (op) > 0 \ | |
1498 | && INTVAL (op) <= 31) \ | |
1499 | goto LABEL; \ | |
1500 | } \ | |
ff73fb53 NC |
1501 | /* NASTY: Since this limits the addressing of unsigned byte loads */ \ |
1502 | range = ((MODE) == HImode || (MODE) == QImode) \ | |
1503 | ? (arm_arch4 ? 256 : 4095) : 4096; \ | |
ff9940b0 RE |
1504 | if (code == CONST_INT && INTVAL (INDEX) < range \ |
1505 | && INTVAL (INDEX) > -range) \ | |
1506 | goto LABEL; \ | |
4d01c30f | 1507 | } \ |
35d965d5 RS |
1508 | } while (0) |
1509 | ||
1510 | /* Jump to LABEL if X is a valid address RTX. This must also take | |
1511 | REG_OK_STRICT into account when deciding about valid registers, but it uses | |
1512 | the above macros so we are in luck. Allow REG, REG+REG, REG+INDEX, | |
1513 | INDEX+REG, REG-INDEX, and non floating SYMBOL_REF to the constant pool. | |
ff9940b0 RE |
1514 | Allow REG-only and AUTINC-REG if handling TImode or HImode. Other symbol |
1515 | refs must be forced though a static cell to ensure addressability. */ | |
11c1a207 | 1516 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ |
35d965d5 RS |
1517 | { \ |
1518 | if (BASE_REGISTER_RTX_P (X)) \ | |
1519 | goto LABEL; \ | |
1520 | else if ((GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC) \ | |
1521 | && GET_CODE (XEXP (X, 0)) == REG \ | |
1522 | && REG_OK_FOR_PRE_POST_P (XEXP (X, 0))) \ | |
1523 | goto LABEL; \ | |
11c1a207 RE |
1524 | else if (GET_MODE_SIZE (MODE) >= 4 && reload_completed \ |
1525 | && (GET_CODE (X) == LABEL_REF \ | |
1526 | || (GET_CODE (X) == CONST \ | |
1527 | && GET_CODE (XEXP ((X), 0)) == PLUS \ | |
1528 | && GET_CODE (XEXP (XEXP ((X), 0), 0)) == LABEL_REF \ | |
1529 | && GET_CODE (XEXP (XEXP ((X), 0), 1)) == CONST_INT)))\ | |
1530 | goto LABEL; \ | |
35d965d5 RS |
1531 | else if ((MODE) == TImode) \ |
1532 | ; \ | |
11c1a207 RE |
1533 | else if ((MODE) == DImode || (TARGET_SOFT_FLOAT && (MODE) == DFmode)) \ |
1534 | { \ | |
1535 | if (GET_CODE (X) == PLUS && BASE_REGISTER_RTX_P (XEXP (X, 0)) \ | |
1536 | && GET_CODE (XEXP (X, 1)) == CONST_INT) \ | |
1537 | { \ | |
1538 | HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \ | |
1539 | if (val == 4 || val == -4 || val == -8) \ | |
1540 | goto LABEL; \ | |
1541 | } \ | |
1542 | } \ | |
35d965d5 RS |
1543 | else if (GET_CODE (X) == PLUS) \ |
1544 | { \ | |
1545 | rtx xop0 = XEXP(X,0); \ | |
1546 | rtx xop1 = XEXP(X,1); \ | |
1547 | \ | |
1548 | if (BASE_REGISTER_RTX_P (xop0)) \ | |
1549 | GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop0), xop1, LABEL); \ | |
1550 | else if (BASE_REGISTER_RTX_P (xop1)) \ | |
1551 | GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop1), xop0, LABEL); \ | |
1552 | } \ | |
18543a22 ILT |
1553 | /* Reload currently can't handle MINUS, so disable this for now */ \ |
1554 | /* else if (GET_CODE (X) == MINUS) \ | |
35d965d5 RS |
1555 | { \ |
1556 | rtx xop0 = XEXP (X,0); \ | |
1557 | rtx xop1 = XEXP (X,1); \ | |
1558 | \ | |
1559 | if (BASE_REGISTER_RTX_P (xop0)) \ | |
1560 | GO_IF_LEGITIMATE_INDEX (MODE, -1, xop1, LABEL); \ | |
18543a22 | 1561 | } */ \ |
35d965d5 RS |
1562 | else if (GET_MODE_CLASS (MODE) != MODE_FLOAT \ |
1563 | && GET_CODE (X) == SYMBOL_REF \ | |
43cffd11 RE |
1564 | && CONSTANT_POOL_ADDRESS_P (X) \ |
1565 | && ! (flag_pic \ | |
1566 | && symbol_mentioned_p (get_pool_constant (X)))) \ | |
35d965d5 RS |
1567 | goto LABEL; \ |
1568 | else if ((GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_DEC) \ | |
11c1a207 | 1569 | && (GET_MODE_SIZE (MODE) <= 4) \ |
35d965d5 RS |
1570 | && GET_CODE (XEXP (X, 0)) == REG \ |
1571 | && REG_OK_FOR_PRE_POST_P (XEXP (X, 0))) \ | |
1572 | goto LABEL; \ | |
1573 | } | |
1574 | \f | |
1575 | /* Try machine-dependent ways of modifying an illegitimate address | |
1576 | to be legitimate. If we find one, return the new, valid address. | |
1577 | This macro is used in only one place: `memory_address' in explow.c. | |
1578 | ||
1579 | OLDX is the address as it was before break_out_memory_refs was called. | |
1580 | In some cases it is useful to look at this to decide what needs to be done. | |
1581 | ||
1582 | MODE and WIN are passed so that this macro can use | |
1583 | GO_IF_LEGITIMATE_ADDRESS. | |
1584 | ||
1585 | It is always safe for this macro to do nothing. It exists to recognize | |
1586 | opportunities to optimize the output. | |
1587 | ||
1588 | On the ARM, try to convert [REG, #BIGCONST] | |
1589 | into ADD BASE, REG, #UPPERCONST and [BASE, #VALIDCONST], | |
1590 | where VALIDCONST == 0 in case of TImode. */ | |
7a801826 | 1591 | extern struct rtx_def *legitimize_pic_address (); |
3967692c RE |
1592 | #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \ |
1593 | { \ | |
1594 | if (GET_CODE (X) == PLUS) \ | |
1595 | { \ | |
1596 | rtx xop0 = XEXP (X, 0); \ | |
1597 | rtx xop1 = XEXP (X, 1); \ | |
1598 | \ | |
11c1a207 | 1599 | if (CONSTANT_P (xop0) && ! symbol_mentioned_p (xop0)) \ |
3967692c | 1600 | xop0 = force_reg (SImode, xop0); \ |
11c1a207 | 1601 | if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \ |
3967692c RE |
1602 | xop1 = force_reg (SImode, xop1); \ |
1603 | if (BASE_REGISTER_RTX_P (xop0) && GET_CODE (xop1) == CONST_INT) \ | |
1604 | { \ | |
1605 | HOST_WIDE_INT n, low_n; \ | |
1606 | rtx base_reg, val; \ | |
1607 | n = INTVAL (xop1); \ | |
1608 | \ | |
11c1a207 | 1609 | if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \ |
3967692c RE |
1610 | { \ |
1611 | low_n = n & 0x0f; \ | |
1612 | n &= ~0x0f; \ | |
1613 | if (low_n > 4) \ | |
1614 | { \ | |
1615 | n += 16; \ | |
1616 | low_n -= 16; \ | |
1617 | } \ | |
1618 | } \ | |
1619 | else \ | |
1620 | { \ | |
1621 | low_n = ((MODE) == TImode ? 0 \ | |
1622 | : n >= 0 ? (n & 0xfff) : -((-n) & 0xfff)); \ | |
1623 | n -= low_n; \ | |
1624 | } \ | |
1625 | base_reg = gen_reg_rtx (SImode); \ | |
43cffd11 RE |
1626 | val = force_operand (gen_rtx_PLUS (SImode, xop0, \ |
1627 | GEN_INT (n)), NULL_RTX); \ | |
3967692c RE |
1628 | emit_move_insn (base_reg, val); \ |
1629 | (X) = (low_n == 0 ? base_reg \ | |
43cffd11 | 1630 | : gen_rtx_PLUS (SImode, base_reg, GEN_INT (low_n))); \ |
3967692c RE |
1631 | } \ |
1632 | else if (xop0 != XEXP (X, 0) || xop1 != XEXP (x, 1)) \ | |
43cffd11 | 1633 | (X) = gen_rtx_PLUS (SImode, xop0, xop1); \ |
3967692c RE |
1634 | } \ |
1635 | else if (GET_CODE (X) == MINUS) \ | |
1636 | { \ | |
1637 | rtx xop0 = XEXP (X, 0); \ | |
1638 | rtx xop1 = XEXP (X, 1); \ | |
1639 | \ | |
1640 | if (CONSTANT_P (xop0)) \ | |
1641 | xop0 = force_reg (SImode, xop0); \ | |
11c1a207 | 1642 | if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \ |
3967692c RE |
1643 | xop1 = force_reg (SImode, xop1); \ |
1644 | if (xop0 != XEXP (X, 0) || xop1 != XEXP (X, 1)) \ | |
43cffd11 | 1645 | (X) = gen_rtx_MINUS (SImode, xop0, xop1); \ |
3967692c | 1646 | } \ |
7a801826 RE |
1647 | if (flag_pic) \ |
1648 | (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX); \ | |
3967692c RE |
1649 | if (memory_address_p (MODE, X)) \ |
1650 | goto WIN; \ | |
35d965d5 RS |
1651 | } |
1652 | ||
1653 | /* Go to LABEL if ADDR (a legitimate address expression) | |
1654 | has an effect that depends on the machine mode it is used for. */ | |
1655 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ | |
1656 | { \ | |
1657 | if (GET_CODE(ADDR) == PRE_DEC || GET_CODE(ADDR) == POST_DEC \ | |
1658 | || GET_CODE(ADDR) == PRE_INC || GET_CODE(ADDR) == POST_INC) \ | |
1659 | goto LABEL; \ | |
1660 | } | |
1661 | \f | |
1662 | /* Specify the machine mode that this machine uses | |
1663 | for the index in the tablejump instruction. */ | |
1664 | #define CASE_VECTOR_MODE SImode | |
1665 | ||
18543a22 ILT |
1666 | /* Define as C expression which evaluates to nonzero if the tablejump |
1667 | instruction expects the table to contain offsets from the address of the | |
1668 | table. | |
1669 | Do not define this if the table should contain absolute addresses. */ | |
1670 | /* #define CASE_VECTOR_PC_RELATIVE 1 */ | |
35d965d5 RS |
1671 | |
1672 | /* Specify the tree operation to be used to convert reals to integers. */ | |
1673 | #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR | |
1674 | ||
1675 | /* This is the kind of divide that is easiest to do in the general case. */ | |
1676 | #define EASY_DIV_EXPR TRUNC_DIV_EXPR | |
1677 | ||
ff9940b0 RE |
1678 | /* signed 'char' is most compatible, but RISC OS wants it unsigned. |
1679 | unsigned is probably best, but may break some code. */ | |
1680 | #ifndef DEFAULT_SIGNED_CHAR | |
3967692c | 1681 | #define DEFAULT_SIGNED_CHAR 0 |
35d965d5 RS |
1682 | #endif |
1683 | ||
1684 | /* Don't cse the address of the function being compiled. */ | |
1685 | #define NO_RECURSIVE_FUNCTION_CSE 1 | |
1686 | ||
1687 | /* Max number of bytes we can move from memory to memory | |
d17ce9af TG |
1688 | in one reasonably fast instruction. */ |
1689 | #define MOVE_MAX 4 | |
35d965d5 | 1690 | |
ff9940b0 RE |
1691 | /* Define if operations between registers always perform the operation |
1692 | on the full register even if a narrower mode is specified. */ | |
1693 | #define WORD_REGISTER_OPERATIONS | |
1694 | ||
1695 | /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD | |
1696 | will either zero-extend or sign-extend. The value of this macro should | |
1697 | be the code that says which one of the two operations is implicitly | |
1698 | done, NIL if none. */ | |
9c872872 | 1699 | #define LOAD_EXTEND_OP(MODE) \ |
11c1a207 | 1700 | ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \ |
9c872872 | 1701 | : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)) |
ff9940b0 | 1702 | |
35d965d5 RS |
1703 | /* Define this if zero-extension is slow (more than one real instruction). |
1704 | On the ARM, it is more than one instruction only if not fetching from | |
1705 | memory. */ | |
1706 | /* #define SLOW_ZERO_EXTEND */ | |
1707 | ||
1708 | /* Nonzero if access to memory by bytes is slow and undesirable. */ | |
1709 | #define SLOW_BYTE_ACCESS 0 | |
1710 | ||
1711 | /* Immediate shift counts are truncated by the output routines (or was it | |
1712 | the assembler?). Shift counts in a register are truncated by ARM. Note | |
1713 | that the native compiler puts too large (> 32) immediate shift counts | |
1714 | into a register and shifts by the register, letting the ARM decide what | |
1715 | to do instead of doing that itself. */ | |
ff9940b0 RE |
1716 | /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that |
1717 | code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y). | |
1718 | On the arm, Y in a register is used modulo 256 for the shift. Only for | |
1719 | rotates is modulo 32 used. */ | |
1720 | /* #define SHIFT_COUNT_TRUNCATED 1 */ | |
35d965d5 | 1721 | |
35d965d5 RS |
1722 | /* All integers have the same format so truncation is easy. */ |
1723 | #define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC) 1 | |
1724 | ||
1725 | /* Calling from registers is a massive pain. */ | |
1726 | #define NO_FUNCTION_CSE 1 | |
1727 | ||
1728 | /* Chars and shorts should be passed as ints. */ | |
1729 | #define PROMOTE_PROTOTYPES 1 | |
1730 | ||
35d965d5 RS |
1731 | /* The machine modes of pointers and functions */ |
1732 | #define Pmode SImode | |
1733 | #define FUNCTION_MODE Pmode | |
1734 | ||
1735 | /* The structure type of the machine dependent info field of insns | |
1736 | No uses for this yet. */ | |
1737 | /* #define INSN_MACHINE_INFO struct machine_info */ | |
1738 | ||
1739 | /* The relative costs of various types of constants. Note that cse.c defines | |
1740 | REG = 1, SUBREG = 2, any node = (2 + sum of subnodes). */ | |
ff9940b0 RE |
1741 | #define CONST_COSTS(RTX, CODE, OUTER_CODE) \ |
1742 | case CONST_INT: \ | |
1743 | if (const_ok_for_arm (INTVAL (RTX))) \ | |
1744 | return (OUTER_CODE) == SET ? 2 : -1; \ | |
1745 | else if (OUTER_CODE == AND \ | |
1746 | && const_ok_for_arm (~INTVAL (RTX))) \ | |
1747 | return -1; \ | |
1748 | else if ((OUTER_CODE == COMPARE \ | |
1749 | || OUTER_CODE == PLUS || OUTER_CODE == MINUS) \ | |
1750 | && const_ok_for_arm (-INTVAL (RTX))) \ | |
1751 | return -1; \ | |
1752 | else \ | |
1753 | return 5; \ | |
1754 | case CONST: \ | |
1755 | case LABEL_REF: \ | |
1756 | case SYMBOL_REF: \ | |
1757 | return 6; \ | |
1758 | case CONST_DOUBLE: \ | |
1759 | if (const_double_rtx_ok_for_fpu (RTX)) \ | |
1760 | return (OUTER_CODE) == SET ? 2 : -1; \ | |
1761 | else if (((OUTER_CODE) == COMPARE || (OUTER_CODE) == PLUS) \ | |
1762 | && neg_const_double_rtx_ok_for_fpu (RTX)) \ | |
1763 | return -1; \ | |
1764 | return(7); | |
1765 | ||
3967692c RE |
1766 | #define ARM_FRAME_RTX(X) \ |
1767 | ((X) == frame_pointer_rtx || (X) == stack_pointer_rtx \ | |
1768 | || (X) == arg_pointer_rtx) | |
1769 | ||
8625fab5 | 1770 | #define DEFAULT_RTX_COSTS(X,CODE,OUTER_CODE) \ |
74bbc178 | 1771 | return arm_rtx_costs (X, CODE); |
ff9940b0 RE |
1772 | |
1773 | /* Moves to and from memory are quite expensive */ | |
cbd5b9a2 | 1774 | #define MEMORY_MOVE_COST(MODE,CLASS,IN) 10 |
ff9940b0 | 1775 | |
3967692c | 1776 | /* All address computations that can be done are free, but rtx cost returns |
ddd5a7c1 | 1777 | the same for practically all of them. So we weight the different types |
3967692c RE |
1778 | of address here in the order (most pref first): |
1779 | PRE/POST_INC/DEC, SHIFT or NON-INT sum, INT sum, REG, MEM or LABEL. */ | |
1780 | #define ADDRESS_COST(X) \ | |
1781 | (10 - ((GET_CODE (X) == MEM || GET_CODE (X) == LABEL_REF \ | |
1782 | || GET_CODE (X) == SYMBOL_REF) \ | |
1783 | ? 0 \ | |
1784 | : ((GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC \ | |
1785 | || GET_CODE (X) == POST_INC || GET_CODE (X) == POST_DEC) \ | |
1786 | ? 10 \ | |
1787 | : (((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS) \ | |
1788 | ? 6 + (GET_CODE (XEXP (X, 1)) == CONST_INT ? 2 \ | |
1789 | : ((GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == '2' \ | |
1790 | || GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == 'c' \ | |
1791 | || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == '2' \ | |
1792 | || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == 'c') \ | |
1793 | ? 1 : 0)) \ | |
1794 | : 4))))) | |
1795 | ||
1796 | ||
ff9940b0 RE |
1797 | |
1798 | /* Try to generate sequences that don't involve branches, we can then use | |
1799 | conditional instructions */ | |
1800 | #define BRANCH_COST 4 | |
7a801826 RE |
1801 | |
1802 | /* A C statement to update the variable COST based on the relationship | |
1803 | between INSN that is dependent on DEP through dependence LINK. */ | |
1804 | #define ADJUST_COST(INSN,LINK,DEP,COST) \ | |
1805 | (COST) = arm_adjust_cost ((INSN), (LINK), (DEP), (COST)) | |
1806 | \f | |
1807 | /* Position Independent Code. */ | |
1808 | /* We decide which register to use based on the compilation options and | |
1809 | the assembler in use; this is more general than the APCS restriction of | |
1810 | using sb (r9) all the time. */ | |
1811 | extern int arm_pic_register; | |
1812 | ||
1813 | /* The register number of the register used to address a table of static | |
1814 | data addresses in memory. */ | |
1815 | #define PIC_OFFSET_TABLE_REGNUM arm_pic_register | |
1816 | ||
1817 | #define FINALIZE_PIC arm_finalize_pic () | |
1818 | ||
f5a1b0d2 NC |
1819 | /* We can't directly access anything that contains a symbol, |
1820 | nor can we indirect via the constant pool. */ | |
43cffd11 RE |
1821 | #define LEGITIMATE_PIC_OPERAND_P(X) \ |
1822 | (! symbol_mentioned_p (X) \ | |
1823 | && (! CONSTANT_POOL_ADDRESS_P (X) \ | |
1824 | || ! symbol_mentioned_p (get_pool_constant (X)))) | |
13bd191d PB |
1825 | |
1826 | /* We need to know when we are making a constant pool; this determines | |
1827 | whether data needs to be in the GOT or can be referenced via a GOT | |
1828 | offset. */ | |
1829 | extern int making_const_table; | |
7a801826 | 1830 | |
35d965d5 | 1831 | \f |
ff9940b0 RE |
1832 | /* Condition code information. */ |
1833 | /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, | |
1834 | return the mode to be used for the comparison. | |
ddd5a7c1 | 1835 | CCFPEmode should be used with floating inequalities, |
ff9940b0 | 1836 | CCFPmode should be used with floating equalities. |
ddd5a7c1 | 1837 | CC_NOOVmode should be used with SImode integer equalities. |
69fcc21d | 1838 | CC_Zmode should be used if only the Z flag is set correctly |
ff9940b0 RE |
1839 | CCmode should be used otherwise. */ |
1840 | ||
89c7ca52 RE |
1841 | #define EXTRA_CC_MODES CC_NOOVmode, CC_Zmode, CC_SWPmode, \ |
1842 | CCFPmode, CCFPEmode, CC_DNEmode, CC_DEQmode, CC_DLEmode, \ | |
1843 | CC_DLTmode, CC_DGEmode, CC_DGTmode, CC_DLEUmode, CC_DLTUmode, \ | |
62dd06ea | 1844 | CC_DGEUmode, CC_DGTUmode, CC_Cmode |
89c7ca52 RE |
1845 | |
1846 | #define EXTRA_CC_NAMES "CC_NOOV", "CC_Z", "CC_SWP", "CCFP", "CCFPE", \ | |
1847 | "CC_DNE", "CC_DEQ", "CC_DLE", "CC_DLT", "CC_DGE", "CC_DGT", "CC_DLEU", \ | |
62dd06ea | 1848 | "CC_DLTU", "CC_DGEU", "CC_DGTU", "CC_C" |
89c7ca52 | 1849 | |
89c7ca52 | 1850 | #define SELECT_CC_MODE(OP,X,Y) arm_select_cc_mode ((OP), (X), (Y)) |
ff9940b0 | 1851 | |
008cf58a RE |
1852 | #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) |
1853 | ||
62dd06ea RE |
1854 | #define CANONICALIZE_COMPARISON(CODE,OP0,OP1) \ |
1855 | do \ | |
1856 | { \ | |
1857 | if (GET_CODE (OP1) == CONST_INT \ | |
1858 | && ! (const_ok_for_arm (INTVAL (OP1)) \ | |
1859 | || (const_ok_for_arm (- INTVAL (OP1))))) \ | |
1860 | { \ | |
1861 | rtx const_op = OP1; \ | |
1862 | CODE = arm_canonicalize_comparison ((CODE), &const_op); \ | |
ad076f4e | 1863 | OP1 = const_op; \ |
62dd06ea RE |
1864 | } \ |
1865 | } while (0) | |
1866 | ||
ff9940b0 RE |
1867 | #define STORE_FLAG_VALUE 1 |
1868 | ||
1869 | /* Define the information needed to generate branch insns. This is | |
1870 | stored from the compare operation. Note that we can't use "rtx" here | |
1871 | since it hasn't been defined! */ | |
1872 | ||
1873 | extern struct rtx_def *arm_compare_op0, *arm_compare_op1; | |
ff9940b0 RE |
1874 | |
1875 | /* Define the codes that are matched by predicates in arm.c */ | |
1876 | #define PREDICATE_CODES \ | |
1877 | {"s_register_operand", {SUBREG, REG}}, \ | |
71791e16 | 1878 | {"f_register_operand", {SUBREG, REG}}, \ |
ff9940b0 RE |
1879 | {"arm_add_operand", {SUBREG, REG, CONST_INT}}, \ |
1880 | {"fpu_add_operand", {SUBREG, REG, CONST_DOUBLE}}, \ | |
1881 | {"arm_rhs_operand", {SUBREG, REG, CONST_INT}}, \ | |
1882 | {"fpu_rhs_operand", {SUBREG, REG, CONST_DOUBLE}}, \ | |
1883 | {"arm_not_operand", {SUBREG, REG, CONST_INT}}, \ | |
69fcc21d | 1884 | {"offsettable_memory_operand", {MEM}}, \ |
4d818c85 | 1885 | {"bad_signed_byte_operand", {MEM}}, \ |
69fcc21d | 1886 | {"alignable_memory_operand", {MEM}}, \ |
ff9940b0 RE |
1887 | {"shiftable_operator", {PLUS, MINUS, AND, IOR, XOR}}, \ |
1888 | {"minmax_operator", {SMIN, SMAX, UMIN, UMAX}}, \ | |
3967692c | 1889 | {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT, ROTATERT, MULT}}, \ |
ff9940b0 | 1890 | {"di_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE, MEM}}, \ |
c383667d | 1891 | {"soft_df_operand", {SUBREG, REG, CONST_DOUBLE, MEM}}, \ |
ff9940b0 RE |
1892 | {"load_multiple_operation", {PARALLEL}}, \ |
1893 | {"store_multiple_operation", {PARALLEL}}, \ | |
1894 | {"equality_operator", {EQ, NE}}, \ | |
1895 | {"arm_rhsm_operand", {SUBREG, REG, CONST_INT, MEM}}, \ | |
1896 | {"const_shift_operand", {CONST_INT}}, \ | |
1897 | {"index_operand", {SUBREG, REG, CONST_INT}}, \ | |
3967692c RE |
1898 | {"reg_or_int_operand", {SUBREG, REG, CONST_INT}}, \ |
1899 | {"multi_register_push", {PARALLEL}}, \ | |
31e6408a | 1900 | {"cc_register", {REG}}, \ |
89c7ca52 | 1901 | {"dominant_cc_register", {REG}}, |
ff9940b0 | 1902 | |
35d965d5 | 1903 | \f |
35d965d5 | 1904 | |
11c1a207 RE |
1905 | /* Gcc puts the pool in the wrong place for ARM, since we can only |
1906 | load addresses a limited distance around the pc. We do some | |
1907 | special munging to move the constant pool values to the correct | |
1908 | point in the code. */ | |
1909 | #define MACHINE_DEPENDENT_REORG(INSN) arm_reorg ((INSN)) | |
35d965d5 | 1910 | |
11c1a207 RE |
1911 | /* The pool is empty, since we have moved everything into the code. */ |
1912 | #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE,X,MODE,ALIGN,LABELNO,JUMPTO) \ | |
1913 | goto JUMPTO | |
35d965d5 RS |
1914 | |
1915 | /* Output an internal label definition. */ | |
b355a481 | 1916 | #ifndef ASM_OUTPUT_INTERNAL_LABEL |
18543a22 ILT |
1917 | #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \ |
1918 | do \ | |
1919 | { \ | |
2a5307b1 | 1920 | char * s = (char *) alloca (40 + strlen (PREFIX)); \ |
18543a22 ILT |
1921 | extern int arm_target_label, arm_ccfsm_state; \ |
1922 | extern rtx arm_target_insn; \ | |
1923 | \ | |
1924 | if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \ | |
1925 | && !strcmp (PREFIX, "L")) \ | |
1926 | { \ | |
1927 | arm_ccfsm_state = 0; \ | |
1928 | arm_target_insn = NULL; \ | |
1929 | } \ | |
1930 | ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \ | |
1931 | ASM_OUTPUT_LABEL (STREAM, s); \ | |
35d965d5 | 1932 | } while (0) |
b355a481 | 1933 | #endif |
2a5307b1 | 1934 | |
35d965d5 | 1935 | /* Output a push or a pop instruction (only used when profiling). */ |
c383667d | 1936 | #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \ |
2a5307b1 NC |
1937 | fprintf (STREAM,"\tstmfd\t%ssp!,{%s%s}\n", \ |
1938 | REGISTER_PREFIX, REGISTER_PREFIX, reg_names [REGNO]) | |
35d965d5 | 1939 | |
c383667d | 1940 | #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \ |
2a5307b1 NC |
1941 | fprintf (STREAM,"\tldmfd\t%ssp!,{%s%s}\n", \ |
1942 | REGISTER_PREFIX, REGISTER_PREFIX, reg_names [REGNO]) | |
35d965d5 | 1943 | |
35d965d5 RS |
1944 | /* Target characters. */ |
1945 | #define TARGET_BELL 007 | |
1946 | #define TARGET_BS 010 | |
1947 | #define TARGET_TAB 011 | |
1948 | #define TARGET_NEWLINE 012 | |
1949 | #define TARGET_VT 013 | |
1950 | #define TARGET_FF 014 | |
1951 | #define TARGET_CR 015 | |
1952 | \f | |
35d965d5 RS |
1953 | /* Only perform branch elimination (by making instructions conditional) if |
1954 | we're optimising. Otherwise it's of no use anyway. */ | |
1955 | #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ | |
1956 | if (optimize) \ | |
74bbc178 | 1957 | arm_final_prescan_insn (INSN) |
35d965d5 | 1958 | |
7bc7696c RE |
1959 | #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ |
1960 | ((CODE) == '?' || (CODE) == '|' || (CODE) == '@') | |
1961 | /* Output an operand of an instruction. */ | |
35d965d5 | 1962 | #define PRINT_OPERAND(STREAM, X, CODE) \ |
7bc7696c RE |
1963 | arm_print_operand (STREAM, X, CODE) |
1964 | ||
1965 | #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \ | |
1966 | (HOST_BITS_PER_WIDE_INT <= 32 ? (x) \ | |
1967 | : (((x) & (unsigned HOST_WIDE_INT) 0xffffffff) | \ | |
1968 | (((x) & (unsigned HOST_WIDE_INT) 0x80000000) \ | |
1969 | ? ((~ (HOST_WIDE_INT) 0) \ | |
1970 | & ~ (unsigned HOST_WIDE_INT) 0xffffffff) \ | |
1971 | : 0)))) | |
35d965d5 RS |
1972 | |
1973 | /* Output the address of an operand. */ | |
1974 | #define PRINT_OPERAND_ADDRESS(STREAM,X) \ | |
1975 | { \ | |
1976 | int is_minus = GET_CODE (X) == MINUS; \ | |
1977 | \ | |
1978 | if (GET_CODE (X) == REG) \ | |
c383667d | 1979 | fprintf (STREAM, "[%s%s, #0]", REGISTER_PREFIX, \ |
4eda77ec | 1980 | reg_names[REGNO (X)]); \ |
35d965d5 RS |
1981 | else if (GET_CODE (X) == PLUS || is_minus) \ |
1982 | { \ | |
1983 | rtx base = XEXP (X, 0); \ | |
1984 | rtx index = XEXP (X, 1); \ | |
2a5307b1 | 1985 | char * base_reg_name; \ |
7bc7696c | 1986 | HOST_WIDE_INT offset = 0; \ |
35d965d5 RS |
1987 | if (GET_CODE (base) != REG) \ |
1988 | { \ | |
1989 | /* Ensure that BASE is a register (one of them must be). */ \ | |
1990 | rtx temp = base; \ | |
1991 | base = index; \ | |
1992 | index = temp; \ | |
1993 | } \ | |
1994 | base_reg_name = reg_names[REGNO (base)]; \ | |
1995 | switch (GET_CODE (index)) \ | |
1996 | { \ | |
1997 | case CONST_INT: \ | |
1998 | offset = INTVAL (index); \ | |
1999 | if (is_minus) \ | |
2000 | offset = -offset; \ | |
c383667d | 2001 | fprintf (STREAM, "[%s%s, #%d]", REGISTER_PREFIX, \ |
4eda77ec | 2002 | base_reg_name, offset); \ |
35d965d5 RS |
2003 | break; \ |
2004 | \ | |
2005 | case REG: \ | |
c383667d | 2006 | fprintf (STREAM, "[%s%s, %s%s%s]", REGISTER_PREFIX, \ |
4eda77ec | 2007 | base_reg_name, is_minus ? "-" : "", \ |
c383667d | 2008 | REGISTER_PREFIX, reg_names[REGNO (index)] ); \ |
35d965d5 RS |
2009 | break; \ |
2010 | \ | |
2011 | case MULT: \ | |
ff9940b0 RE |
2012 | case ASHIFTRT: \ |
2013 | case LSHIFTRT: \ | |
2014 | case ASHIFT: \ | |
ff9940b0 RE |
2015 | case ROTATERT: \ |
2016 | { \ | |
c383667d DE |
2017 | fprintf (STREAM, "[%s%s, %s%s%s", REGISTER_PREFIX, \ |
2018 | base_reg_name, is_minus ? "-" : "", REGISTER_PREFIX,\ | |
7bc7696c RE |
2019 | reg_names[REGNO (XEXP (index, 0))]); \ |
2020 | arm_print_operand (STREAM, index, 'S'); \ | |
2021 | fputs ("]", STREAM); \ | |
ff9940b0 RE |
2022 | break; \ |
2023 | } \ | |
35d965d5 RS |
2024 | \ |
2025 | default: \ | |
2026 | abort(); \ | |
2027 | } \ | |
2028 | } \ | |
2029 | else if (GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC \ | |
2030 | || GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC) \ | |
2031 | { \ | |
2032 | extern int output_memory_reference_mode; \ | |
2033 | \ | |
2034 | if (GET_CODE (XEXP (X, 0)) != REG) \ | |
2035 | abort (); \ | |
2036 | \ | |
2037 | if (GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \ | |
c383667d | 2038 | fprintf (STREAM, "[%s%s, #%s%d]!", REGISTER_PREFIX, \ |
4eda77ec | 2039 | reg_names[REGNO (XEXP (X, 0))], \ |
35d965d5 RS |
2040 | GET_CODE (X) == PRE_DEC ? "-" : "", \ |
2041 | GET_MODE_SIZE (output_memory_reference_mode)); \ | |
2042 | else \ | |
c383667d | 2043 | fprintf (STREAM, "[%s%s], #%s%d", REGISTER_PREFIX, \ |
4eda77ec | 2044 | reg_names[REGNO (XEXP (X, 0))], \ |
35d965d5 RS |
2045 | GET_CODE (X) == POST_DEC ? "-" : "", \ |
2046 | GET_MODE_SIZE (output_memory_reference_mode)); \ | |
2047 | } \ | |
13bd191d | 2048 | else output_addr_const (STREAM, X); \ |
35d965d5 | 2049 | } |
62dd06ea | 2050 | |
7a801826 | 2051 | /* Handles PIC addr specially */ |
13bd191d | 2052 | #define OUTPUT_INT_ADDR_CONST(STREAM,X) \ |
7a801826 | 2053 | { \ |
13bd191d | 2054 | if (flag_pic && GET_CODE (X) == CONST && is_pic (X)) \ |
7a801826 | 2055 | { \ |
13bd191d PB |
2056 | output_addr_const (STREAM, XEXP (XEXP (XEXP (X, 0), 0), 0)); \ |
2057 | fputs (" - (", STREAM); \ | |
2058 | output_addr_const (STREAM, XEXP (XEXP (XEXP (X, 0), 1), 0)); \ | |
2059 | fputs (")", STREAM); \ | |
7a801826 | 2060 | } \ |
13bd191d | 2061 | else output_addr_const (STREAM, X); \ |
687f77a1 NC |
2062 | \ |
2063 | /* Mark symbols as position independent. We only do this in the \ | |
2064 | .text segment, not in the .data segment. */ \ | |
2065 | if (NEED_PLT_GOT && flag_pic && making_const_table && \ | |
2066 | (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == LABEL_REF)) \ | |
2067 | { \ | |
2068 | if (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X)) \ | |
2069 | fprintf (STREAM, "(GOTOFF)"); \ | |
2070 | else if (GET_CODE (X) == LABEL_REF) \ | |
2071 | fprintf (STREAM, "(GOTOFF)"); \ | |
2072 | else \ | |
2073 | fprintf (STREAM, "(GOT)"); \ | |
2074 | } \ | |
7a801826 RE |
2075 | } |
2076 | ||
62dd06ea RE |
2077 | /* Output code to add DELTA to the first argument, and then jump to FUNCTION. |
2078 | Used for C++ multiple inheritance. */ | |
2079 | #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \ | |
2080 | do { \ | |
2081 | int mi_delta = (DELTA); \ | |
2082 | char *mi_op = mi_delta < 0 ? "sub" : "add"; \ | |
2083 | int shift = 0; \ | |
13bd191d | 2084 | int this_regno = (aggregate_value_p (TREE_TYPE (TREE_TYPE (FUNCTION)))\ |
821581e4 | 2085 | ? 1 : 0); \ |
62dd06ea RE |
2086 | if (mi_delta < 0) mi_delta = -mi_delta; \ |
2087 | while (mi_delta != 0) \ | |
2088 | { \ | |
2089 | if (mi_delta & (3 << shift) == 0) \ | |
2090 | shift += 2; \ | |
2091 | else \ | |
2092 | { \ | |
2093 | fprintf (FILE, "\t%s\t%s%s, %s%s, #%d\n", \ | |
821581e4 DE |
2094 | mi_op, REGISTER_PREFIX, reg_names[this_regno], \ |
2095 | REGISTER_PREFIX, reg_names[this_regno], \ | |
62dd06ea | 2096 | mi_delta & (0xff << shift)); \ |
62dd06ea RE |
2097 | mi_delta &= ~(0xff << shift); \ |
2098 | shift += 8; \ | |
2099 | } \ | |
2100 | } \ | |
18543a22 | 2101 | fputs ("\tb\t", FILE); \ |
92d4501f | 2102 | assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \ |
f3b2a1c9 PB |
2103 | if (NEED_PLT_GOT) \ |
2104 | fputs ("(PLT)", FILE); \ | |
18543a22 | 2105 | fputc ('\n', FILE); \ |
62dd06ea | 2106 | } while (0) |
39950dff | 2107 | |
6a5d7526 MS |
2108 | /* A C expression whose value is RTL representing the value of the return |
2109 | address for the frame COUNT steps up from the current frame. */ | |
2110 | ||
2111 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
2112 | ((COUNT == 0) \ | |
43cffd11 | 2113 | ? gen_rtx_MEM (Pmode, plus_constant (FRAME, -4)) \ |
18543a22 | 2114 | : NULL_RTX) |
6a5d7526 | 2115 | |
39950dff MS |
2116 | /* Used to mask out junk bits from the return address, such as |
2117 | processor state, interrupt status, condition codes and the like. */ | |
2118 | #define MASK_RETURN_ADDR \ | |
2119 | /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \ | |
2120 | in 26 bit mode, the condition codes must be masked out of the \ | |
2121 | return address. This does not apply to ARM6 and later processors \ | |
2122 | when running in 32 bit mode. */ \ | |
7a801826 | 2123 | ((!TARGET_APCS_32) ? (GEN_INT (0x03fffffc)) : (GEN_INT (0xffffffff))) |
71791e16 | 2124 | |
0e8285f1 RE |
2125 | /* The remainder of this file is only needed for building the compiler |
2126 | itself, not for the collateral. */ | |
2127 | #ifdef HAVE_CONFIG_H | |
2128 | ||
2129 | /* Prototypes for functions in arm.c */ | |
aec3cfba NC |
2130 | |
2131 | #ifdef BUFSIZ /* stdio.h has been included, ok to use FILE * */ | |
2132 | #define STDIO_PROTO(ARGS) PROTO (ARGS) | |
2133 | #else | |
2134 | #define STDIO_PROTO(ARGS) () | |
2135 | #endif | |
2136 | ||
2137 | #ifndef TREE_CODE | |
2138 | union tree_node; | |
2139 | #define Tree union tree_node * | |
2140 | #else | |
2141 | #define Tree tree | |
2142 | #endif | |
2143 | ||
2144 | #ifndef RTX_CODE | |
2145 | struct rtx_def; | |
2146 | #define Rtx struct rtx_def * | |
2147 | #else | |
2148 | #define Rtx rtx | |
2149 | #endif | |
2150 | ||
2151 | #ifndef HOST_WIDE_INT | |
2152 | #include "hwint.h" | |
2153 | #endif | |
2154 | #define Hint HOST_WIDE_INT | |
2155 | ||
2156 | #ifndef HAVE_MACHINE_MODES | |
2157 | #include "machmode.h" | |
2158 | #endif | |
2159 | #define Mmode enum machine_mode | |
2160 | ||
2161 | #ifdef RTX_CODE | |
2162 | #define RTX_CODE_PROTO(ARGS) PROTO (ARGS) | |
2163 | #else | |
2164 | #define RTX_CODE_PROTO(ARGS) () | |
2165 | #endif | |
2166 | #define Rcode enum rtx_code | |
2167 | ||
2168 | void arm_override_options PROTO ((void)); | |
2169 | int use_return_insn PROTO ((int)); | |
2170 | int const_ok_for_arm PROTO ((Hint)); | |
aec3cfba NC |
2171 | int arm_split_constant RTX_CODE_PROTO ((Rcode, Mmode, Hint, Rtx, Rtx, int)); |
2172 | Rcode arm_canonicalize_comparison RTX_CODE_PROTO ((Rcode, Rtx *)); | |
2173 | int arm_return_in_memory PROTO ((Tree)); | |
2174 | int legitimate_pic_operand_p PROTO ((Rtx)); | |
2175 | Rtx legitimize_pic_address PROTO ((Rtx, Mmode, Rtx)); | |
2176 | int is_pic PROTO ((Rtx)); | |
2177 | void arm_finalize_pic PROTO ((void)); | |
74bbc178 | 2178 | int arm_rtx_costs RTX_CODE_PROTO ((Rtx, Rcode)); |
aec3cfba NC |
2179 | int arm_adjust_cost PROTO ((Rtx, Rtx, Rtx, int)); |
2180 | int const_double_rtx_ok_for_fpu PROTO ((Rtx)); | |
2181 | int neg_const_double_rtx_ok_for_fpu PROTO ((Rtx)); | |
2182 | int s_register_operand PROTO ((Rtx, Mmode)); | |
2183 | int f_register_operand PROTO ((Rtx, Mmode)); | |
2184 | int reg_or_int_operand PROTO ((Rtx, Mmode)); | |
2185 | int reload_memory_operand PROTO ((Rtx, Mmode)); | |
2186 | int arm_rhs_operand PROTO ((Rtx, Mmode)); | |
2187 | int arm_rhsm_operand PROTO ((Rtx, Mmode)); | |
2188 | int arm_add_operand PROTO ((Rtx, Mmode)); | |
2189 | int arm_not_operand PROTO ((Rtx, Mmode)); | |
2190 | int offsettable_memory_operand PROTO ((Rtx, Mmode)); | |
2191 | int alignable_memory_operand PROTO ((Rtx, Mmode)); | |
2192 | int bad_signed_byte_operand PROTO ((Rtx, Mmode)); | |
2193 | int fpu_rhs_operand PROTO ((Rtx, Mmode)); | |
2194 | int fpu_add_operand PROTO ((Rtx, Mmode)); | |
2195 | int power_of_two_operand PROTO ((Rtx, Mmode)); | |
2196 | int di_operand PROTO ((Rtx, Mmode)); | |
2197 | int soft_df_operand PROTO ((Rtx, Mmode)); | |
2198 | int index_operand PROTO ((Rtx, Mmode)); | |
2199 | int const_shift_operand PROTO ((Rtx, Mmode)); | |
2200 | int shiftable_operator PROTO ((Rtx, Mmode)); | |
2201 | int shift_operator PROTO ((Rtx, Mmode)); | |
2202 | int equality_operator PROTO ((Rtx, Mmode)); | |
2203 | int minmax_operator PROTO ((Rtx, Mmode)); | |
2204 | int cc_register PROTO ((Rtx, Mmode)); | |
2205 | int dominant_cc_register PROTO ((Rtx, Mmode)); | |
2206 | int symbol_mentioned_p PROTO ((Rtx)); | |
2207 | int label_mentioned_p PROTO ((Rtx)); | |
2208 | Rcode minmax_code PROTO ((Rtx)); | |
2209 | int adjacent_mem_locations PROTO ((Rtx, Rtx)); | |
2210 | int load_multiple_operation PROTO ((Rtx, Mmode)); | |
2211 | int store_multiple_operation PROTO ((Rtx, Mmode)); | |
2212 | int load_multiple_sequence PROTO ((Rtx *, int, int *, int *, Hint *)); | |
2213 | char * emit_ldm_seq PROTO ((Rtx *, int)); | |
2214 | int store_multiple_sequence PROTO ((Rtx *, int, int *, int *, Hint *)); | |
2215 | char * emit_stm_seq PROTO ((Rtx *, int)); | |
74bbc178 | 2216 | int arm_valid_machine_decl_attribute PROTO ((Tree, Tree, Tree)); |
aec3cfba NC |
2217 | Rtx arm_gen_load_multiple PROTO ((int, int, Rtx, int, int, int, int, int)); |
2218 | Rtx arm_gen_store_multiple PROTO ((int, int, Rtx, int, int, int, int, int)); | |
2219 | int arm_gen_movstrqi PROTO ((Rtx *)); | |
2220 | Rtx gen_rotated_half_load PROTO ((Rtx)); | |
2221 | Mmode arm_select_cc_mode RTX_CODE_PROTO ((Rcode, Rtx, Rtx)); | |
2222 | Rtx gen_compare_reg RTX_CODE_PROTO ((Rcode, Rtx, Rtx, int)); | |
2223 | void arm_reload_in_hi PROTO ((Rtx *)); | |
2224 | void arm_reload_out_hi PROTO ((Rtx *)); | |
2225 | void arm_reorg PROTO ((Rtx)); | |
2226 | char * fp_immediate_constant PROTO ((Rtx)); | |
2227 | void print_multi_reg STDIO_PROTO ((FILE *, char *, int, int)); | |
2228 | char * output_call PROTO ((Rtx *)); | |
2229 | char * output_call_mem PROTO ((Rtx *)); | |
2230 | char * output_mov_long_double_fpu_from_arm PROTO ((Rtx *)); | |
2231 | char * output_mov_long_double_arm_from_fpu PROTO ((Rtx *)); | |
2232 | char * output_mov_long_double_arm_from_arm PROTO ((Rtx *)); | |
2233 | char * output_mov_double_fpu_from_arm PROTO ((Rtx *)); | |
2234 | char * output_mov_double_arm_from_fpu PROTO ((Rtx *)); | |
2235 | char * output_move_double PROTO ((Rtx *)); | |
2236 | char * output_mov_immediate PROTO ((Rtx *)); | |
2237 | char * output_add_immediate PROTO ((Rtx *)); | |
2238 | char * arithmetic_instr PROTO ((Rtx, int)); | |
2239 | void output_ascii_pseudo_op STDIO_PROTO ((FILE *, unsigned char *, int)); | |
2240 | char * output_return_instruction PROTO ((Rtx, int, int)); | |
2241 | int arm_volatile_func PROTO ((void)); | |
ef179a26 | 2242 | void arm_poke_function_name STDIO_PROTO ((FILE *, char *)); |
aec3cfba NC |
2243 | void output_func_prologue STDIO_PROTO ((FILE *, int)); |
2244 | void output_func_epilogue STDIO_PROTO ((FILE *, int)); | |
2245 | void arm_expand_prologue PROTO ((void)); | |
2246 | void arm_print_operand STDIO_PROTO ((FILE *, Rtx, int)); | |
74bbc178 | 2247 | void arm_final_prescan_insn PROTO ((Rtx)); |
aec3cfba NC |
2248 | int short_branch PROTO ((int, int)); |
2249 | void assemble_align PROTO((int)); /* Used in arm.md, but defined in output.c */ | |
2250 | int multi_register_push PROTO ((Rtx, Mmode)); | |
71791e16 | 2251 | #ifdef AOF_ASSEMBLER |
aec3cfba NC |
2252 | Rtx aof_pic_entry PROTO ((Rtx)); |
2253 | void aof_dump_pic_table STDIO_PROTO ((FILE *)); | |
2254 | char * aof_text_section PROTO ((void)); | |
2255 | char * aof_data_section PROTO ((void)); | |
2256 | void aof_add_import PROTO ((char *)); | |
2257 | void aof_delete_import PROTO ((char *)); | |
2258 | void aof_dump_imports STDIO_PROTO ((FILE *)); | |
71791e16 | 2259 | #endif |
0e8285f1 | 2260 | #endif /* HAVE_CONFIG_H */ |
b355a481 NC |
2261 | |
2262 | #endif /* __ARM_H__ */ |