1 /* Target definitions for PowerPC running Darwin (Mac OS X).
2 Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2010
3 Free Software Foundation, Inc.
4 Contributed by Apple Computer Inc.
6 This file is part of GCC.
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.
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.
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/>. */
26 #define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)");
28 /* The "Darwin ABI" is mostly like AIX, but with some key differences. */
30 #define DEFAULT_ABI ABI_DARWIN
35 #define TARGET_64BIT 1
37 #define TARGET_64BIT 0
41 /* The object file format is Mach-O. */
43 #define TARGET_OBJECT_FORMAT OBJECT_MACHO
45 /* Size of the Obj-C jump buffer. */
46 #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
48 /* We're not ever going to do TOCs. */
51 #define TARGET_NO_TOC 1
53 /* Override the default rs6000 definition. */
55 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
57 #define TARGET_OS_CPP_BUILTINS() \
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); \
68 /* Generate branch islands stubs if this is true. */
69 extern int darwin_emit_branch_islands;
71 #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options ()
73 #define C_COMMON_OVERRIDE_OPTIONS do { \
74 /* On powerpc, __cxa_get_exception_ptr is available starting in the \
75 10.4.6 libstdc++.dylib. */ \
76 if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \
77 && flag_use_cxa_get_exception_ptr == 2) \
78 flag_use_cxa_get_exception_ptr = 0; \
80 flag_no_builtin = 1; \
81 SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
84 /* Darwin has 128-bit long double support in libc in 10.4 and later.
85 Default to 128-bit long doubles even on earlier platforms for ABI
86 consistency; arithmetic will work even if libc and libm support is
89 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
92 /* We want -fPIC by default, unless we're using -static to compile for
93 the kernel or some such. The "-faltivec" option should have been
94 called "-maltivec" all along. */
98 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
99 %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
100 %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \
101 %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \
102 %{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \
103 %<faltivec %<fno-altivec " \
106 #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
108 #define DARWIN_SUBARCH_SPEC " \
123 mcpu=power4:ppc970; \
127 /* crt2.o is at least partially required for 10.3.x and earlier. */
128 #define DARWIN_CRT2_SPEC \
129 "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
131 /* Determine a minimum version based on compiler options. */
132 #define DARWIN_MINVERSION_SPEC \
133 "%{m64:%{fgnu-runtime:10.4; \
134 ,objective-c|,objc-cpp-output:10.5; \
135 ,objective-c-header:10.5; \
136 ,objective-c++|,objective-c++-cpp-output:10.5; \
137 ,objective-c++-header|,objc++-cpp-output:10.5; \
139 shared-libgcc:10.3; \
142 #undef SUBTARGET_EXTRA_SPECS
143 #define SUBTARGET_EXTRA_SPECS \
145 { "darwin_arch", DARWIN_ARCH_SPEC }, \
146 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
147 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
149 /* Output a .machine directive. */
150 #undef TARGET_ASM_FILE_START
151 #define TARGET_ASM_FILE_START rs6000_darwin_file_start
153 /* Make both r2 and r13 available for allocation. */
157 /* Base register for access to local variables of the function. */
159 #undef HARD_FRAME_POINTER_REGNUM
160 #define HARD_FRAME_POINTER_REGNUM 30
162 #undef RS6000_PIC_OFFSET_TABLE_REGNUM
163 #define RS6000_PIC_OFFSET_TABLE_REGNUM 31
165 /* Pad the outgoing args area to 16 bytes instead of the usual 8. */
167 #undef STARTING_FRAME_OFFSET
168 #define STARTING_FRAME_OFFSET \
169 (FRAME_GROWS_DOWNWARD \
171 : (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
174 #undef STACK_DYNAMIC_OFFSET
175 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
176 (RS6000_ALIGN (crtl->outgoing_args_size, 16) \
177 + (STACK_POINTER_OFFSET))
179 /* Define cutoff for using external functions to save floating point.
180 Currently on Darwin, always use inline stores. */
182 #undef FP_SAVE_INLINE
183 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
184 #undef GP_SAVE_INLINE
185 #define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
187 /* Darwin uses a function call if everything needs to be saved/restored. */
189 #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
191 /* The assembler wants the alternate register names, but without
192 leading percent sign. */
193 #undef REGISTER_NAMES
194 #define REGISTER_NAMES \
196 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
197 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
198 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
199 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
200 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
201 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
202 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
203 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
204 "mq", "lr", "ctr", "ap", \
205 "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
207 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
208 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
209 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
210 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
212 "spe_acc", "spefscr", \
216 /* This outputs NAME to FILE. */
218 #undef RS6000_OUTPUT_BASENAME
219 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
220 assemble_name (FILE, NAME)
222 /* Globalizing directive for a label. */
224 #define GLOBAL_ASM_OP "\t.globl "
225 #undef TARGET_ASM_GLOBALIZE_LABEL
227 /* This is how to output an internal label prefix. rs6000.c uses this
228 when generating traceback tables. */
229 /* Not really used for Darwin? */
231 #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
232 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
233 fprintf (FILE, "%s", PREFIX)
235 /* This says how to output an assembler line to define a global common
237 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
239 unsigned HOST_WIDE_INT _new_size = SIZE; \
240 fputs ("\t.comm ", (FILE)); \
241 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
242 if (_new_size == 0) _new_size = 1; \
243 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", _new_size); \
246 /* Override the standard rs6000 definition. */
248 #undef ASM_COMMENT_START
249 #define ASM_COMMENT_START ";"
251 /* FP save and restore routines. */
252 #define SAVE_FP_PREFIX "._savef"
253 #define SAVE_FP_SUFFIX ""
254 #define RESTORE_FP_PREFIX "._restf"
255 #define RESTORE_FP_SUFFIX ""
257 /* This is how to output an assembler line that says to advance
258 the location counter to a multiple of 2**LOG bytes using the
259 "nop" instruction as padding. */
261 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
266 ASM_OUTPUT_ALIGN (FILE,LOG); \
268 else /* nop == ori r0,r0,0 */ \
269 fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
272 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
273 /* This is supported in cctools 465 and later. The macro test
274 above prevents using it in earlier build environments. */
275 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
278 if ((MAX_SKIP) == 0) \
279 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
281 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
285 /* Generate insns to call the profiler. */
287 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
289 /* Function name to call to do profiling. */
291 #define RS6000_MCOUNT "*mcount"
293 /* Default processor: G4, and G5 for 64-bit. */
295 #undef PROCESSOR_DEFAULT
296 #define PROCESSOR_DEFAULT PROCESSOR_PPC7400
297 #undef PROCESSOR_DEFAULT64
298 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
300 /* Default target flag settings. Despite the fact that STMW/LMW
301 serializes, it's still a big code size win to use them. Use FSEL by
304 #undef TARGET_DEFAULT
305 #define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
308 /* Darwin only runs on PowerPC, so short-circuit POWER patterns. */
310 #define TARGET_POWER 0
311 #undef TARGET_IEEEQUAD
312 #define TARGET_IEEEQUAD 0
314 /* Since Darwin doesn't do TOCs, stub this out. */
316 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
318 /* Unlike most other PowerPC targets, chars are signed, for
319 consistency with other Darwin architectures. */
321 #undef DEFAULT_SIGNED_CHAR
322 #define DEFAULT_SIGNED_CHAR (1)
324 /* Given an rtx X being reloaded into a reg required to be
325 in class CLASS, return the class of reg to actually use.
326 In general this is just CLASS; but on some machines
327 in some cases it is preferable to use a more restrictive class.
329 On the RS/6000, we have to return NO_REGS when we want to reload a
330 floating-point CONST_DOUBLE to force it to be copied to memory.
332 Don't allow R0 when loading the address of, or otherwise furtling with,
335 #undef PREFERRED_RELOAD_CLASS
336 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
338 && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
340 : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
341 && reg_class_subset_p (BASE_REGS, (CLASS))) \
343 : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
344 && (CLASS) == NON_SPECIAL_REGS) \
348 /* Compute field alignment. This is similar to the version of the
349 macro in the Apple version of GCC, except that version supports
350 'mac68k' alignment, and that version uses the computed alignment
351 always for the first field of a structure. The first-field
352 behavior is dealt with by
353 darwin_rs6000_special_round_type_align. */
354 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
355 (TARGET_ALIGN_NATURAL ? (COMPUTED) \
356 : (COMPUTED) == 128 ? 128 \
357 : MIN ((COMPUTED), 32))
359 /* Darwin increases natural record alignment to doubleword if the first
360 field is an FP double while the FP fields remain word aligned. */
361 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
362 ((TREE_CODE (STRUCT) == RECORD_TYPE \
363 || TREE_CODE (STRUCT) == UNION_TYPE \
364 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
365 && TARGET_ALIGN_NATURAL == 0 \
366 ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
367 : (TREE_CODE (STRUCT) == VECTOR_TYPE \
368 && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
369 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
370 : MAX ((COMPUTED), (SPECIFIED)))
372 /* Specify padding for the last element of a block move between
373 registers and memory. FIRST is nonzero if this is the only
375 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
376 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
378 #define DOUBLE_INT_ASM_OP "\t.quad\t"
380 /* For binary compatibility with 2.95; Darwin C APIs use bool from
381 stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
382 choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
383 #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
385 #undef REGISTER_TARGET_PRAGMAS
386 #define REGISTER_TARGET_PRAGMAS() \
389 DARWIN_REGISTER_TARGET_PRAGMAS(); \
390 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
398 #if !defined(__LP64__) && !defined(DARWIN_LIBSYSTEM_HAS_UNWIND)
399 #define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"
402 /* True, iff we're generating fast turn around debugging code. When
403 true, we arrange for function prologues to start with 5 nops so
404 that gdb may insert code to redirect them, and for data to be
405 accessed indirectly. The runtime uses this indirection to forward
406 references for data to the original instance of that data. */
408 #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
410 /* This is the reserved direct dispatch address for Objective-C. */
411 #define OFFS_MSGSEND_FAST 0xFFFEFF00
413 /* This is the reserved ivar address Objective-C. */
414 #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
416 /* Old versions of Mac OS/Darwin don't have C99 functions available. */
417 #undef TARGET_C99_FUNCTIONS
418 #define TARGET_C99_FUNCTIONS \
420 || strverscmp (darwin_macosx_version_min, "10.3") >= 0)
422 /* When generating kernel code or kexts, we don't use Altivec by
423 default, as kernel code doesn't save/restore those registers. */
424 #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
426 /* PPC Darwin has to rename some of the long double builtins. */
427 #undef SUBTARGET_INIT_BUILTINS
428 #define SUBTARGET_INIT_BUILTINS \
430 darwin_patch_builtins (); \
431 darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_COUNT)); \