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comparison gcc/config/powerpcspe/darwin.h @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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68:561a7518be6b 111:04ced10e8804
1 /* Target definitions for PowerPC running Darwin (Mac OS X).
2 Copyright (C) 1997-2017 Free Software Foundation, Inc.
3 Contributed by Apple Computer Inc.
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published
9 by the Free Software Foundation; either version 3, or (at your
10 option) any later version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
20
21 #undef DARWIN_PPC
22 #define DARWIN_PPC 1
23
24 /* The "Darwin ABI" is mostly like AIX, but with some key differences. */
25
26 #define DEFAULT_ABI ABI_DARWIN
27
28 #ifdef IN_LIBGCC2
29 #undef TARGET_64BIT
30 #ifdef __powerpc64__
31 #define TARGET_64BIT 1
32 #else
33 #define TARGET_64BIT 0
34 #endif
35 #endif
36
37 /* The object file format is Mach-O. */
38
39 #define TARGET_OBJECT_FORMAT OBJECT_MACHO
40
41 /* Size of the Obj-C jump buffer. */
42 #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
43
44 /* We're not ever going to do TOCs. */
45
46 #define TARGET_TOC 0
47 #define TARGET_NO_TOC 1
48
49 /* Override the default rs6000 definition. */
50 #undef PTRDIFF_TYPE
51 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
52
53 #define TARGET_OS_CPP_BUILTINS() \
54 do \
55 { \
56 if (!TARGET_64BIT) builtin_define ("__ppc__"); \
57 if (TARGET_64BIT) builtin_define ("__ppc64__"); \
58 builtin_define ("__POWERPC__"); \
59 builtin_define ("__NATURAL_ALIGNMENT__"); \
60 darwin_cpp_builtins (pfile); \
61 } \
62 while (0)
63
64 /* Generate branch islands stubs if this is true. */
65 extern int darwin_emit_branch_islands;
66
67 #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options ()
68
69 #define C_COMMON_OVERRIDE_OPTIONS do { \
70 /* On powerpc, __cxa_get_exception_ptr is available starting in the \
71 10.4.6 libstdc++.dylib. */ \
72 if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \
73 && flag_use_cxa_get_exception_ptr == 2) \
74 flag_use_cxa_get_exception_ptr = 0; \
75 if (flag_mkernel) \
76 flag_no_builtin = 1; \
77 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
78 } while (0)
79
80 /* Darwin has 128-bit long double support in libc in 10.4 and later.
81 Default to 128-bit long doubles even on earlier platforms for ABI
82 consistency; arithmetic will work even if libc and libm support is
83 not available. */
84
85 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
86
87
88 /* We want -fPIC by default, unless we're using -static to compile for
89 the kernel or some such. The "-faltivec" option should have been
90 called "-maltivec" all along. */
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 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
97 %{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \
98 %<faltivec %<fno-altivec " \
99 DARWIN_CC1_SPEC
100
101 #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
102
103 #define DARWIN_SUBARCH_SPEC " \
104 %{m64: ppc64} \
105 %{!m64: \
106 %{mcpu=601:ppc601; \
107 mcpu=603:ppc603; \
108 mcpu=603e:ppc603; \
109 mcpu=604:ppc604; \
110 mcpu=604e:ppc604e; \
111 mcpu=740:ppc750; \
112 mcpu=750:ppc750; \
113 mcpu=G3:ppc750; \
114 mcpu=7400:ppc7400; \
115 mcpu=G4:ppc7400; \
116 mcpu=7450:ppc7450; \
117 mcpu=970:ppc970; \
118 mcpu=power4:ppc970; \
119 mcpu=G5:ppc970; \
120 :ppc}}"
121
122 /* crt2.o is at least partially required for 10.3.x and earlier. */
123 #define DARWIN_CRT2_SPEC \
124 "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
125
126 #undef SUBTARGET_EXTRA_SPECS
127 #define SUBTARGET_EXTRA_SPECS \
128 DARWIN_EXTRA_SPECS \
129 { "darwin_arch", DARWIN_ARCH_SPEC }, \
130 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
131 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
132
133 /* Output a .machine directive. */
134 #undef TARGET_ASM_FILE_START
135 #define TARGET_ASM_FILE_START rs6000_darwin_file_start
136
137 /* Make both r2 and r13 available for allocation. */
138 #define FIXED_R2 0
139 #define FIXED_R13 0
140
141 /* Base register for access to local variables of the function. */
142
143 #undef HARD_FRAME_POINTER_REGNUM
144 #define HARD_FRAME_POINTER_REGNUM 30
145
146 #undef RS6000_PIC_OFFSET_TABLE_REGNUM
147 #define RS6000_PIC_OFFSET_TABLE_REGNUM 31
148
149 /* Pad the outgoing args area to 16 bytes instead of the usual 8. */
150
151 #undef RS6000_STARTING_FRAME_OFFSET
152 #define RS6000_STARTING_FRAME_OFFSET \
153 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
154 + RS6000_SAVE_AREA)
155
156 #undef STACK_DYNAMIC_OFFSET
157 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
158 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
159 + (STACK_POINTER_OFFSET))
160
161 /* Darwin uses a function call if everything needs to be saved/restored. */
162
163 #undef WORLD_SAVE_P
164 #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
165
166 /* We don't use these on Darwin, they are just place-holders. */
167 #define SAVE_FP_PREFIX ""
168 #define SAVE_FP_SUFFIX ""
169 #define RESTORE_FP_PREFIX ""
170 #define RESTORE_FP_SUFFIX ""
171
172 /* The assembler wants the alternate register names, but without
173 leading percent sign. */
174 #undef REGISTER_NAMES
175 #define REGISTER_NAMES \
176 { \
177 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
178 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
179 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
180 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
181 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
182 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
183 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
184 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
185 "mq", "lr", "ctr", "ap", \
186 "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
187 "xer", \
188 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
189 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
190 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
191 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
192 "vrsave", "vscr", \
193 "spe_acc", "spefscr", \
194 "sfp", \
195 "tfhar", "tfiar", "texasr", \
196 "rh0", "rh1", "rh2", "rh3", "rh4", "rh5", "rh6", "rh7", \
197 "rh8", "rh9", "rh10", "rh11", "rh12", "rh13", "rh14", "rh15", \
198 "rh16", "rh17", "rh18", "rh19", "rh20", "rh21", "rh22", "rh23", \
199 "rh24", "rh25", "rh26", "rh27", "rh28", "rh29", "rh30", "rh31" \
200 }
201
202 /* This outputs NAME to FILE. */
203
204 #undef RS6000_OUTPUT_BASENAME
205 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
206 assemble_name (FILE, NAME)
207
208 /* Globalizing directive for a label. */
209 #undef GLOBAL_ASM_OP
210 #define GLOBAL_ASM_OP "\t.globl "
211 #undef TARGET_ASM_GLOBALIZE_LABEL
212
213 /* This is how to output an internal label prefix. rs6000.c uses this
214 when generating traceback tables. */
215 /* Not really used for Darwin? */
216
217 #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
218 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
219 fprintf (FILE, "%s", PREFIX)
220
221 /* Override the standard rs6000 definition. */
222
223 #undef ASM_COMMENT_START
224 #define ASM_COMMENT_START ";"
225
226 /* This is how to output an assembler line that says to advance
227 the location counter to a multiple of 2**LOG bytes using the
228 "nop" instruction as padding. */
229
230 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
231 do \
232 { \
233 if ((LOG) < 3) \
234 { \
235 ASM_OUTPUT_ALIGN (FILE,LOG); \
236 } \
237 else /* nop == ori r0,r0,0 */ \
238 fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
239 } while (0)
240
241 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
242 /* This is supported in cctools 465 and later. The macro test
243 above prevents using it in earlier build environments. */
244 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
245 if ((LOG) != 0) \
246 { \
247 if ((MAX_SKIP) == 0) \
248 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
249 else \
250 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
251 }
252 #endif
253
254 /* Generate insns to call the profiler. */
255
256 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
257
258 /* Function name to call to do profiling. */
259
260 #define RS6000_MCOUNT "*mcount"
261
262 /* Default processor: G4, and G5 for 64-bit. */
263
264 #undef PROCESSOR_DEFAULT
265 #define PROCESSOR_DEFAULT PROCESSOR_PPC7400
266 #undef PROCESSOR_DEFAULT64
267 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
268
269 /* Default target flag settings. Despite the fact that STMW/LMW
270 serializes, it's still a big code size win to use them. Use FSEL by
271 default as well. */
272
273 #undef TARGET_DEFAULT
274 #define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT)
275
276 /* Darwin always uses IBM long double, never IEEE long double. */
277 #undef TARGET_IEEEQUAD
278 #define TARGET_IEEEQUAD 0
279
280 /* Since Darwin doesn't do TOCs, stub this out. */
281
282 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
283
284 /* Unlike most other PowerPC targets, chars are signed, for
285 consistency with other Darwin architectures. */
286
287 #undef DEFAULT_SIGNED_CHAR
288 #define DEFAULT_SIGNED_CHAR (1)
289
290 /* Given an rtx X being reloaded into a reg required to be
291 in class CLASS, return the class of reg to actually use.
292 In general this is just CLASS; but on some machines
293 in some cases it is preferable to use a more restrictive class.
294
295 On the RS/6000, we have to return NO_REGS when we want to reload a
296 floating-point CONST_DOUBLE to force it to be copied to memory.
297
298 Don't allow R0 when loading the address of, or otherwise furtling with,
299 a SYMBOL_REF. */
300
301 #undef PREFERRED_RELOAD_CLASS
302 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
303 ((CONSTANT_P (X) \
304 && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
305 ? NO_REGS \
306 : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
307 && reg_class_subset_p (BASE_REGS, (CLASS))) \
308 ? BASE_REGS \
309 : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
310 && (CLASS) == NON_SPECIAL_REGS) \
311 ? GENERAL_REGS \
312 : (CLASS))
313
314 /* Compute field alignment.
315 This implements the 'power' alignment rule by pegging the alignment of
316 items (beyond the first aggregate field) to 32 bits. The pegging is
317 suppressed for vector and long double items (both 128 in size).
318 There is a dummy use of the FIELD argument to avoid an unused variable
319 warning (see PR59496). */
320 #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
321 ((void) (FIELD), \
322 (TARGET_ALIGN_NATURAL \
323 ? (COMPUTED) \
324 : (COMPUTED) == 128 \
325 ? 128 \
326 : MIN ((COMPUTED), 32)))
327
328 /* Darwin increases natural record alignment to doubleword if the first
329 field is an FP double while the FP fields remain word aligned. */
330 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
331 ((TREE_CODE (STRUCT) == RECORD_TYPE \
332 || TREE_CODE (STRUCT) == UNION_TYPE \
333 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
334 && TARGET_ALIGN_NATURAL == 0 \
335 ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
336 : (TREE_CODE (STRUCT) == VECTOR_TYPE \
337 && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
338 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
339 : MAX ((COMPUTED), (SPECIFIED)))
340
341 /* Specify padding for the last element of a block move between
342 registers and memory. FIRST is nonzero if this is the only
343 element. */
344 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
345 (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE))
346
347 #define DOUBLE_INT_ASM_OP "\t.quad\t"
348
349 /* For binary compatibility with 2.95; Darwin C APIs use bool from
350 stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
351 choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
352 #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
353
354 #undef REGISTER_TARGET_PRAGMAS
355 #define REGISTER_TARGET_PRAGMAS() \
356 do \
357 { \
358 DARWIN_REGISTER_TARGET_PRAGMAS(); \
359 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
360 } \
361 while (0)
362
363 #ifdef IN_LIBGCC2
364 #include <stdbool.h>
365 #endif
366
367 /* True, iff we're generating fast turn around debugging code. When
368 true, we arrange for function prologues to start with 5 nops so
369 that gdb may insert code to redirect them, and for data to be
370 accessed indirectly. The runtime uses this indirection to forward
371 references for data to the original instance of that data. */
372
373 #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
374
375 /* This is the reserved direct dispatch address for Objective-C. */
376 #define OFFS_MSGSEND_FAST 0xFFFEFF00
377
378 /* This is the reserved ivar address Objective-C. */
379 #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
380
381 /* Old versions of Mac OS/Darwin don't have C99 functions available. */
382 #undef TARGET_LIBC_HAS_FUNCTION
383 #define TARGET_LIBC_HAS_FUNCTION darwin_libc_has_function
384
385 /* When generating kernel code or kexts, we don't use Altivec by
386 default, as kernel code doesn't save/restore those registers. */
387 #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
388
389 /* Darwin has support for section anchors on powerpc*.
390 It is disabled for any section containing a "zero-sized item" (because these
391 are re-written as size=1 to be compatible with the OSX ld64).
392 The re-writing would interfere with the computation of anchor offsets.
393 Therefore, we place zero-sized items in their own sections and make such
394 sections unavailable to section anchoring. */
395
396 #undef TARGET_ASM_OUTPUT_ANCHOR
397 #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
398
399 #undef TARGET_USE_ANCHORS_FOR_SYMBOL_P
400 #define TARGET_USE_ANCHORS_FOR_SYMBOL_P darwin_use_anchors_for_symbol_p
401
402 #undef DARWIN_SECTION_ANCHORS
403 #define DARWIN_SECTION_ANCHORS 1
404
405 /* PPC Darwin has to rename some of the long double builtins. */
406 #undef SUBTARGET_INIT_BUILTINS
407 #define SUBTARGET_INIT_BUILTINS \
408 do { \
409 darwin_patch_builtins (); \
410 rs6000_builtin_decls[(unsigned) (RS6000_BUILTIN_CFSTRING)] \
411 = darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_CFSTRING)); \
412 } while(0)
413
414 /* So far, there is no rs6000_fold_builtin, if one is introduced, then
415 this will need to be modified similar to the x86 case. */
416 #define TARGET_FOLD_BUILTIN SUBTARGET_FOLD_BUILTIN
417
418 /* Use standard DWARF numbering for DWARF debugging information. */
419 #define RS6000_USE_DWARF_NUMBERING
420