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comparison gcc/config/rs6000/darwin.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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-1:000000000000 0:a06113de4d67
1 /* Target definitions for PowerPC running Darwin (Mac OS X).
2 Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published
10 by the Free Software Foundation; either version 3, or (at your
11 option) any later version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT
14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
16 License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
21
22 #undef TARGET_VERSION
23 #define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)");
24
25 /* The "Darwin ABI" is mostly like AIX, but with some key differences. */
26
27 #define DEFAULT_ABI ABI_DARWIN
28
29 #ifdef IN_LIBGCC2
30 #undef TARGET_64BIT
31 #ifdef __powerpc64__
32 #define TARGET_64BIT 1
33 #else
34 #define TARGET_64BIT 0
35 #endif
36 #endif
37
38 /* The object file format is Mach-O. */
39
40 #define TARGET_OBJECT_FORMAT OBJECT_MACHO
41
42 /* Size of the Obj-C jump buffer. */
43 #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
44
45 /* We're not ever going to do TOCs. */
46
47 #define TARGET_TOC 0
48 #define TARGET_NO_TOC 1
49
50 /* Override the default rs6000 definition. */
51 #undef PTRDIFF_TYPE
52 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
53
54 /* Translate config/rs6000/darwin.opt to config/darwin.h. */
55 #define TARGET_DYNAMIC_NO_PIC (TARGET_MACHO_DYNAMIC_NO_PIC)
56
57 #define TARGET_OS_CPP_BUILTINS() \
58 do \
59 { \
60 if (!TARGET_64BIT) builtin_define ("__ppc__"); \
61 if (TARGET_64BIT) builtin_define ("__ppc64__"); \
62 builtin_define ("__POWERPC__"); \
63 builtin_define ("__NATURAL_ALIGNMENT__"); \
64 darwin_cpp_builtins (pfile); \
65 } \
66 while (0)
67
68 #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options ()
69
70 #define C_COMMON_OVERRIDE_OPTIONS do { \
71 /* On powerpc, __cxa_get_exception_ptr is available starting in the \
72 10.4.6 libstdc++.dylib. */ \
73 if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \
74 && flag_use_cxa_get_exception_ptr == 2) \
75 flag_use_cxa_get_exception_ptr = 0; \
76 if (flag_mkernel) \
77 flag_no_builtin = 1; \
78 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
79 } while (0)
80
81 /* Darwin has 128-bit long double support in libc in 10.4 and later.
82 Default to 128-bit long doubles even on earlier platforms for ABI
83 consistency; arithmetic will work even if libc and libm support is
84 not available. */
85
86 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
87
88
89 /* We want -fPIC by default, unless we're using -static to compile for
90 the kernel or some such. */
91
92 #define CC1_SPEC "\
93 %(cc1_cpu) \
94 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
95 %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
96 %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \
97 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}}"
98
99 #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
100
101 #define DARWIN_SUBARCH_SPEC " \
102 %{m64: ppc64} \
103 %{!m64: \
104 %{mcpu=601:ppc601; \
105 mcpu=603:ppc603; \
106 mcpu=603e:ppc603; \
107 mcpu=604:ppc604; \
108 mcpu=604e:ppc604e; \
109 mcpu=740:ppc750; \
110 mcpu=750:ppc750; \
111 mcpu=G3:ppc750; \
112 mcpu=7400:ppc7400; \
113 mcpu=G4:ppc7400; \
114 mcpu=7450:ppc7450; \
115 mcpu=970:ppc970; \
116 mcpu=power4:ppc970; \
117 mcpu=G5:ppc970; \
118 :ppc}}"
119
120 /* crt2.o is at least partially required for 10.3.x and earlier. */
121 #define DARWIN_CRT2_SPEC \
122 "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
123
124 /* Determine a minimum version based on compiler options. */
125 #define DARWIN_MINVERSION_SPEC \
126 "%{m64:%{fgnu-runtime:10.4; \
127 ,objective-c|,objc-cpp-output:10.5; \
128 ,objective-c-header:10.5; \
129 ,objective-c++|,objective-c++-cpp-output:10.5; \
130 ,objective-c++-header|,objc++-cpp-output:10.5; \
131 :10.4}; \
132 shared-libgcc:10.3; \
133 :10.1}"
134
135 #undef SUBTARGET_EXTRA_SPECS
136 #define SUBTARGET_EXTRA_SPECS \
137 DARWIN_EXTRA_SPECS \
138 { "darwin_arch", DARWIN_ARCH_SPEC }, \
139 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
140 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
141
142 /* Output a .machine directive. */
143 #undef TARGET_ASM_FILE_START
144 #define TARGET_ASM_FILE_START rs6000_darwin_file_start
145
146 /* The "-faltivec" option should have been called "-maltivec" all
147 along. -ffix-and-continue and -findirect-data is for compatibility
148 for old compilers. */
149
150 #define SUBTARGET_OPTION_TRANSLATE_TABLE \
151 { "-ffix-and-continue", "-mfix-and-continue" }, \
152 { "-findirect-data", "-mfix-and-continue" }, \
153 { "-faltivec", "-maltivec -include altivec.h" }, \
154 { "-fno-altivec", "-mno-altivec" }, \
155 { "-Waltivec-long-deprecated", "-mwarn-altivec-long" }, \
156 { "-Wno-altivec-long-deprecated", "-mno-warn-altivec-long" }
157
158 /* Make both r2 and r13 available for allocation. */
159 #define FIXED_R2 0
160 #define FIXED_R13 0
161
162 /* Base register for access to local variables of the function. */
163
164 #undef HARD_FRAME_POINTER_REGNUM
165 #define HARD_FRAME_POINTER_REGNUM 30
166
167 #undef RS6000_PIC_OFFSET_TABLE_REGNUM
168 #define RS6000_PIC_OFFSET_TABLE_REGNUM 31
169
170 /* Pad the outgoing args area to 16 bytes instead of the usual 8. */
171
172 #undef STARTING_FRAME_OFFSET
173 #define STARTING_FRAME_OFFSET \
174 (FRAME_GROWS_DOWNWARD \
175 ? 0 \
176 : (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
177 + RS6000_SAVE_AREA))
178
179 #undef STACK_DYNAMIC_OFFSET
180 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
181 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
182 + (STACK_POINTER_OFFSET))
183
184 /* These are used by -fbranch-probabilities */
185 #define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
186 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
187 "__TEXT,__unlikely,regular,pure_instructions"
188
189 /* Define cutoff for using external functions to save floating point.
190 Currently on Darwin, always use inline stores. */
191
192 #undef FP_SAVE_INLINE
193 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
194 #undef GP_SAVE_INLINE
195 #define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
196
197 /* Darwin uses a function call if everything needs to be saved/restored. */
198 #undef WORLD_SAVE_P
199 #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
200
201 /* The assembler wants the alternate register names, but without
202 leading percent sign. */
203 #undef REGISTER_NAMES
204 #define REGISTER_NAMES \
205 { \
206 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
207 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
208 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
209 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
210 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
211 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
212 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
213 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
214 "mq", "lr", "ctr", "ap", \
215 "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
216 "xer", \
217 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
218 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
219 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
220 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
221 "vrsave", "vscr", \
222 "spe_acc", "spefscr", \
223 "sfp" \
224 }
225
226 /* This outputs NAME to FILE. */
227
228 #undef RS6000_OUTPUT_BASENAME
229 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
230 assemble_name (FILE, NAME)
231
232 /* Globalizing directive for a label. */
233 #undef GLOBAL_ASM_OP
234 #define GLOBAL_ASM_OP "\t.globl "
235 #undef TARGET_ASM_GLOBALIZE_LABEL
236
237 /* This is how to output an internal label prefix. rs6000.c uses this
238 when generating traceback tables. */
239 /* Not really used for Darwin? */
240
241 #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
242 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
243 fprintf (FILE, "%s", PREFIX)
244
245 /* This says how to output an assembler line to define a global common
246 symbol. */
247 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
248 do { \
249 unsigned HOST_WIDE_INT _new_size = SIZE; \
250 fputs (".comm ", (FILE)); \
251 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
252 if (_new_size == 0) _new_size = 1; \
253 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", _new_size); \
254 } while (0)
255
256 /* Override the standard rs6000 definition. */
257
258 #undef ASM_COMMENT_START
259 #define ASM_COMMENT_START ";"
260
261 /* FP save and restore routines. */
262 #define SAVE_FP_PREFIX "._savef"
263 #define SAVE_FP_SUFFIX ""
264 #define RESTORE_FP_PREFIX "._restf"
265 #define RESTORE_FP_SUFFIX ""
266
267 /* This is how to output an assembler line that says to advance
268 the location counter to a multiple of 2**LOG bytes using the
269 "nop" instruction as padding. */
270
271 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
272 do \
273 { \
274 if ((LOG) < 3) \
275 { \
276 ASM_OUTPUT_ALIGN (FILE,LOG); \
277 } \
278 else /* nop == ori r0,r0,0 */ \
279 fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
280 } while (0)
281
282 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
283 /* This is supported in cctools 465 and later. The macro test
284 above prevents using it in earlier build environments. */
285 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
286 if ((LOG) != 0) \
287 { \
288 if ((MAX_SKIP) == 0) \
289 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
290 else \
291 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
292 }
293 #endif
294
295 /* Generate insns to call the profiler. */
296
297 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
298
299 /* Function name to call to do profiling. */
300
301 #define RS6000_MCOUNT "*mcount"
302
303 /* Default processor: G4, and G5 for 64-bit. */
304
305 #undef PROCESSOR_DEFAULT
306 #define PROCESSOR_DEFAULT PROCESSOR_PPC7400
307 #undef PROCESSOR_DEFAULT64
308 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
309
310 /* Default target flag settings. Despite the fact that STMW/LMW
311 serializes, it's still a big code size win to use them. Use FSEL by
312 default as well. */
313
314 #undef TARGET_DEFAULT
315 #define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
316 | MASK_PPC_GFXOPT)
317
318 /* Darwin only runs on PowerPC, so short-circuit POWER patterns. */
319 #undef TARGET_POWER
320 #define TARGET_POWER 0
321 #undef TARGET_IEEEQUAD
322 #define TARGET_IEEEQUAD 0
323
324 /* Since Darwin doesn't do TOCs, stub this out. */
325
326 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
327
328 /* Unlike most other PowerPC targets, chars are signed, for
329 consistency with other Darwin architectures. */
330
331 #undef DEFAULT_SIGNED_CHAR
332 #define DEFAULT_SIGNED_CHAR (1)
333
334 /* Given an rtx X being reloaded into a reg required to be
335 in class CLASS, return the class of reg to actually use.
336 In general this is just CLASS; but on some machines
337 in some cases it is preferable to use a more restrictive class.
338
339 On the RS/6000, we have to return NO_REGS when we want to reload a
340 floating-point CONST_DOUBLE to force it to be copied to memory.
341
342 Don't allow R0 when loading the address of, or otherwise furtling with,
343 a SYMBOL_REF. */
344
345 #undef PREFERRED_RELOAD_CLASS
346 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
347 ((CONSTANT_P (X) \
348 && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
349 ? NO_REGS \
350 : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
351 && reg_class_subset_p (BASE_REGS, (CLASS))) \
352 ? BASE_REGS \
353 : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
354 && (CLASS) == NON_SPECIAL_REGS) \
355 ? GENERAL_REGS \
356 : (CLASS))
357
358 /* Compute field alignment. This is similar to the version of the
359 macro in the Apple version of GCC, except that version supports
360 'mac68k' alignment, and that version uses the computed alignment
361 always for the first field of a structure. The first-field
362 behavior is dealt with by
363 darwin_rs6000_special_round_type_align. */
364 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
365 (TARGET_ALIGN_NATURAL ? (COMPUTED) \
366 : (COMPUTED) == 128 ? 128 \
367 : MIN ((COMPUTED), 32))
368
369 /* Darwin increases natural record alignment to doubleword if the first
370 field is an FP double while the FP fields remain word aligned. */
371 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
372 ((TREE_CODE (STRUCT) == RECORD_TYPE \
373 || TREE_CODE (STRUCT) == UNION_TYPE \
374 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
375 && TARGET_ALIGN_NATURAL == 0 \
376 ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
377 : (TREE_CODE (STRUCT) == VECTOR_TYPE \
378 && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
379 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
380 : MAX ((COMPUTED), (SPECIFIED)))
381
382 /* Specify padding for the last element of a block move between
383 registers and memory. FIRST is nonzero if this is the only
384 element. */
385 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
386 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
387
388 /* XXX: Darwin supports neither .quad, or .llong, but it also doesn't
389 support 64 bit PowerPC either, so this just keeps things happy. */
390 #define DOUBLE_INT_ASM_OP "\t.quad\t"
391
392 /* For binary compatibility with 2.95; Darwin C APIs use bool from
393 stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
394 choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
395 #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
396
397 #undef REGISTER_TARGET_PRAGMAS
398 #define REGISTER_TARGET_PRAGMAS() \
399 do \
400 { \
401 DARWIN_REGISTER_TARGET_PRAGMAS(); \
402 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
403 } \
404 while (0)
405
406 #ifdef IN_LIBGCC2
407 #include <stdbool.h>
408 #endif
409
410 #if !defined(__LP64__) && !defined(DARWIN_LIBSYSTEM_HAS_UNWIND)
411 #define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"
412 #endif
413
414 /* True, iff we're generating fast turn around debugging code. When
415 true, we arrange for function prologues to start with 5 nops so
416 that gdb may insert code to redirect them, and for data to be
417 accessed indirectly. The runtime uses this indirection to forward
418 references for data to the original instance of that data. */
419
420 #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
421
422 /* This is the reserved direct dispatch address for Objective-C. */
423 #define OFFS_MSGSEND_FAST 0xFFFEFF00
424
425 /* This is the reserved ivar address Objective-C. */
426 #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
427
428 /* Old versions of Mac OS/Darwin don't have C99 functions available. */
429 #undef TARGET_C99_FUNCTIONS
430 #define TARGET_C99_FUNCTIONS \
431 (TARGET_64BIT \
432 || strverscmp (darwin_macosx_version_min, "10.3") >= 0)
433
434 /* When generating kernel code or kexts, we don't use Altivec by
435 default, as kernel code doesn't save/restore those registers. */
436 #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
437
438 /* Darwin has to rename some of the long double builtins. */
439 #define SUBTARGET_INIT_BUILTINS darwin_patch_builtins ()