1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
|
/* Target definitions for PowerPC running Darwin (Mac OS X).
Copyright (C) 1997-2014 Free Software Foundation, Inc.
Contributed by Apple Computer Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#undef DARWIN_PPC
#define DARWIN_PPC 1
/* The "Darwin ABI" is mostly like AIX, but with some key differences. */
#define DEFAULT_ABI ABI_DARWIN
#ifdef IN_LIBGCC2
#undef TARGET_64BIT
#ifdef __powerpc64__
#define TARGET_64BIT 1
#else
#define TARGET_64BIT 0
#endif
#endif
/* The object file format is Mach-O. */
#define TARGET_OBJECT_FORMAT OBJECT_MACHO
/* Size of the Obj-C jump buffer. */
#define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
/* We're not ever going to do TOCs. */
#define TARGET_TOC 0
#define TARGET_NO_TOC 1
/* Override the default rs6000 definition. */
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
#define TARGET_OS_CPP_BUILTINS() \
do \
{ \
if (!TARGET_64BIT) builtin_define ("__ppc__"); \
if (TARGET_64BIT) builtin_define ("__ppc64__"); \
builtin_define ("__POWERPC__"); \
builtin_define ("__NATURAL_ALIGNMENT__"); \
darwin_cpp_builtins (pfile); \
} \
while (0)
/* Generate branch islands stubs if this is true. */
extern int darwin_emit_branch_islands;
#define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options ()
#define C_COMMON_OVERRIDE_OPTIONS do { \
/* On powerpc, __cxa_get_exception_ptr is available starting in the \
10.4.6 libstdc++.dylib. */ \
if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \
&& flag_use_cxa_get_exception_ptr == 2) \
flag_use_cxa_get_exception_ptr = 0; \
if (flag_mkernel) \
flag_no_builtin = 1; \
SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
} while (0)
/* Darwin has 128-bit long double support in libc in 10.4 and later.
Default to 128-bit long doubles even on earlier platforms for ABI
consistency; arithmetic will work even if libc and libm support is
not available. */
#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
/* We want -fPIC by default, unless we're using -static to compile for
the kernel or some such. The "-faltivec" option should have been
called "-maltivec" all along. */
#define CC1_SPEC "\
%(cc1_cpu) \
%{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
%{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
%{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \
%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
%{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \
%<faltivec %<fno-altivec " \
DARWIN_CC1_SPEC
#define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
#define DARWIN_SUBARCH_SPEC " \
%{m64: ppc64} \
%{!m64: \
%{mcpu=601:ppc601; \
mcpu=603:ppc603; \
mcpu=603e:ppc603; \
mcpu=604:ppc604; \
mcpu=604e:ppc604e; \
mcpu=740:ppc750; \
mcpu=750:ppc750; \
mcpu=G3:ppc750; \
mcpu=7400:ppc7400; \
mcpu=G4:ppc7400; \
mcpu=7450:ppc7450; \
mcpu=970:ppc970; \
mcpu=power4:ppc970; \
mcpu=G5:ppc970; \
:ppc}}"
/* crt2.o is at least partially required for 10.3.x and earlier. */
#define DARWIN_CRT2_SPEC \
"%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
/* Determine a minimum version based on compiler options. */
#define DARWIN_MINVERSION_SPEC \
"%{m64:%{fgnu-runtime:10.4; \
,objective-c|,objc-cpp-output:10.5; \
,objective-c-header:10.5; \
,objective-c++|,objective-c++-cpp-output:10.5; \
,objective-c++-header|,objc++-cpp-output:10.5; \
:10.4}; \
shared-libgcc:10.3; \
:10.1}"
#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS \
DARWIN_EXTRA_SPECS \
{ "darwin_arch", DARWIN_ARCH_SPEC }, \
{ "darwin_crt2", DARWIN_CRT2_SPEC }, \
{ "darwin_subarch", DARWIN_SUBARCH_SPEC },
/* Output a .machine directive. */
#undef TARGET_ASM_FILE_START
#define TARGET_ASM_FILE_START rs6000_darwin_file_start
/* Make both r2 and r13 available for allocation. */
#define FIXED_R2 0
#define FIXED_R13 0
/* Base register for access to local variables of the function. */
#undef HARD_FRAME_POINTER_REGNUM
#define HARD_FRAME_POINTER_REGNUM 30
#undef RS6000_PIC_OFFSET_TABLE_REGNUM
#define RS6000_PIC_OFFSET_TABLE_REGNUM 31
/* Pad the outgoing args area to 16 bytes instead of the usual 8. */
#undef STARTING_FRAME_OFFSET
#define STARTING_FRAME_OFFSET \
(FRAME_GROWS_DOWNWARD \
? 0 \
: (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
+ RS6000_SAVE_AREA))
#undef STACK_DYNAMIC_OFFSET
#define STACK_DYNAMIC_OFFSET(FUNDECL) \
(RS6000_ALIGN (crtl->outgoing_args_size, 16) \
+ (STACK_POINTER_OFFSET))
/* Darwin uses a function call if everything needs to be saved/restored. */
#undef WORLD_SAVE_P
#define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
/* We don't use these on Darwin, they are just place-holders. */
#define SAVE_FP_PREFIX ""
#define SAVE_FP_SUFFIX ""
#define RESTORE_FP_PREFIX ""
#define RESTORE_FP_SUFFIX ""
/* The assembler wants the alternate register names, but without
leading percent sign. */
#undef REGISTER_NAMES
#define REGISTER_NAMES \
{ \
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
"mq", "lr", "ctr", "ap", \
"cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
"xer", \
"v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
"v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
"v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
"v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
"vrsave", "vscr", \
"spe_acc", "spefscr", \
"sfp", \
"tfhar", "tfiar", "texasr" \
}
/* This outputs NAME to FILE. */
#undef RS6000_OUTPUT_BASENAME
#define RS6000_OUTPUT_BASENAME(FILE, NAME) \
assemble_name (FILE, NAME)
/* Globalizing directive for a label. */
#undef GLOBAL_ASM_OP
#define GLOBAL_ASM_OP "\t.globl "
#undef TARGET_ASM_GLOBALIZE_LABEL
/* This is how to output an internal label prefix. rs6000.c uses this
when generating traceback tables. */
/* Not really used for Darwin? */
#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
fprintf (FILE, "%s", PREFIX)
/* Override the standard rs6000 definition. */
#undef ASM_COMMENT_START
#define ASM_COMMENT_START ";"
/* This is how to output an assembler line that says to advance
the location counter to a multiple of 2**LOG bytes using the
"nop" instruction as padding. */
#define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
do \
{ \
if ((LOG) < 3) \
{ \
ASM_OUTPUT_ALIGN (FILE,LOG); \
} \
else /* nop == ori r0,r0,0 */ \
fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
} while (0)
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
/* This is supported in cctools 465 and later. The macro test
above prevents using it in earlier build environments. */
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
if ((LOG) != 0) \
{ \
if ((MAX_SKIP) == 0) \
fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
else \
fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
}
#endif
/* Generate insns to call the profiler. */
#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
/* Function name to call to do profiling. */
#define RS6000_MCOUNT "*mcount"
/* Default processor: G4, and G5 for 64-bit. */
#undef PROCESSOR_DEFAULT
#define PROCESSOR_DEFAULT PROCESSOR_PPC7400
#undef PROCESSOR_DEFAULT64
#define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
/* Default target flag settings. Despite the fact that STMW/LMW
serializes, it's still a big code size win to use them. Use FSEL by
default as well. */
#undef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT)
/* Darwin always uses IBM long double, never IEEE long double. */
#undef TARGET_IEEEQUAD
#define TARGET_IEEEQUAD 0
/* Since Darwin doesn't do TOCs, stub this out. */
#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
/* Unlike most other PowerPC targets, chars are signed, for
consistency with other Darwin architectures. */
#undef DEFAULT_SIGNED_CHAR
#define DEFAULT_SIGNED_CHAR (1)
/* Given an rtx X being reloaded into a reg required to be
in class CLASS, return the class of reg to actually use.
In general this is just CLASS; but on some machines
in some cases it is preferable to use a more restrictive class.
On the RS/6000, we have to return NO_REGS when we want to reload a
floating-point CONST_DOUBLE to force it to be copied to memory.
Don't allow R0 when loading the address of, or otherwise furtling with,
a SYMBOL_REF. */
#undef PREFERRED_RELOAD_CLASS
#define PREFERRED_RELOAD_CLASS(X,CLASS) \
((CONSTANT_P (X) \
&& reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
? NO_REGS \
: ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
&& reg_class_subset_p (BASE_REGS, (CLASS))) \
? BASE_REGS \
: (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
&& (CLASS) == NON_SPECIAL_REGS) \
? GENERAL_REGS \
: (CLASS))
/* Compute field alignment.
This implements the 'power' alignment rule by pegging the alignment of
items (beyond the first aggregate field) to 32 bits. The pegging is
suppressed for vector and long double items (both 128 in size).
There is a dummy use of the FIELD argument to avoid an unused variable
warning (see PR59496). */
#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
((void) (FIELD), \
(TARGET_ALIGN_NATURAL \
? (COMPUTED) \
: (COMPUTED) == 128 \
? 128 \
: MIN ((COMPUTED), 32)))
/* Darwin increases natural record alignment to doubleword if the first
field is an FP double while the FP fields remain word aligned. */
#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
((TREE_CODE (STRUCT) == RECORD_TYPE \
|| TREE_CODE (STRUCT) == UNION_TYPE \
|| TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
&& TARGET_ALIGN_NATURAL == 0 \
? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
: (TREE_CODE (STRUCT) == VECTOR_TYPE \
&& ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
: MAX ((COMPUTED), (SPECIFIED)))
/* Specify padding for the last element of a block move between
registers and memory. FIRST is nonzero if this is the only
element. */
#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
(!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
#define DOUBLE_INT_ASM_OP "\t.quad\t"
/* For binary compatibility with 2.95; Darwin C APIs use bool from
stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
#define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
#undef REGISTER_TARGET_PRAGMAS
#define REGISTER_TARGET_PRAGMAS() \
do \
{ \
DARWIN_REGISTER_TARGET_PRAGMAS(); \
targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
} \
while (0)
#ifdef IN_LIBGCC2
#include <stdbool.h>
#endif
/* True, iff we're generating fast turn around debugging code. When
true, we arrange for function prologues to start with 5 nops so
that gdb may insert code to redirect them, and for data to be
accessed indirectly. The runtime uses this indirection to forward
references for data to the original instance of that data. */
#define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
/* This is the reserved direct dispatch address for Objective-C. */
#define OFFS_MSGSEND_FAST 0xFFFEFF00
/* This is the reserved ivar address Objective-C. */
#define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
/* Old versions of Mac OS/Darwin don't have C99 functions available. */
#undef TARGET_LIBC_HAS_FUNCTION
#define TARGET_LIBC_HAS_FUNCTION darwin_libc_has_function
/* When generating kernel code or kexts, we don't use Altivec by
default, as kernel code doesn't save/restore those registers. */
#define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
/* Darwin has support for section anchors on powerpc*.
It is disabled for any section containing a "zero-sized item" (because these
are re-written as size=1 to be compatible with the OSX ld64).
The re-writing would interfere with the computation of anchor offsets.
Therefore, we place zero-sized items in their own sections and make such
sections unavailable to section anchoring. */
#undef TARGET_ASM_OUTPUT_ANCHOR
#define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor
#undef TARGET_USE_ANCHORS_FOR_SYMBOL_P
#define TARGET_USE_ANCHORS_FOR_SYMBOL_P darwin_use_anchors_for_symbol_p
#undef DARWIN_SECTION_ANCHORS
#define DARWIN_SECTION_ANCHORS 1
/* PPC Darwin has to rename some of the long double builtins. */
#undef SUBTARGET_INIT_BUILTINS
#define SUBTARGET_INIT_BUILTINS \
do { \
darwin_patch_builtins (); \
rs6000_builtin_decls[(unsigned) (RS6000_BUILTIN_CFSTRING)] \
= darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_CFSTRING)); \
} while(0)
/* So far, there is no rs6000_fold_builtin, if one is introduced, then
this will need to be modified similar to the x86 case. */
#define TARGET_FOLD_BUILTIN SUBTARGET_FOLD_BUILTIN
|
