1 /* Target definitions for PowerPC running Darwin (Mac OS X).
2 Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005
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 2, 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 COPYING. If not, write to the
20 Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
21 MA 02110-1301, USA. */
24 #define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)");
26 /* The "Darwin ABI" is mostly like AIX, but with some key differences. */
28 #define DEFAULT_ABI ABI_DARWIN
30 /* The object file format is Mach-O. */
32 #define TARGET_OBJECT_FORMAT OBJECT_MACHO
34 /* We're not ever going to do TOCs. */
37 #define TARGET_NO_TOC 1
39 /* Override the default rs6000 definition. */
41 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
43 /* Translate config/rs6000/darwin.opt to config/darwin.h. */
44 #define TARGET_DYNAMIC_NO_PIC (TARGET_MACHO_DYNAMIC_NO_PIC)
46 /* Handle #pragma weak and #pragma pack. */
47 #define HANDLE_SYSV_PRAGMA 1
50 #define TARGET_OS_CPP_BUILTINS() \
53 if (!TARGET_64BIT) builtin_define ("__ppc__"); \
54 if (TARGET_64BIT) builtin_define ("__ppc64__"); \
55 builtin_define ("__POWERPC__"); \
56 builtin_define ("__NATURAL_ALIGNMENT__"); \
57 darwin_cpp_builtins (pfile); \
62 /* The Darwin ABI always includes AltiVec, can't be (validly) turned
65 #define SUBTARGET_OVERRIDE_OPTIONS \
67 rs6000_altivec_abi = 1; \
68 TARGET_ALTIVEC_VRSAVE = 1; \
69 if (DEFAULT_ABI == ABI_DARWIN) \
71 if (MACHO_DYNAMIC_NO_PIC_P) \
74 warning (0, "-mdynamic-no-pic overrides -fpic or -fPIC"); \
77 else if (flag_pic == 1) \
79 /* Darwin doesn't support -fpic. */ \
80 warning (0, "-fpic is not supported; -fPIC assumed"); \
84 if (TARGET_64BIT && ! TARGET_POWERPC64) \
86 target_flags |= MASK_POWERPC64; \
87 warning (0, "-m64 requires PowerPC64 architecture, enabling"); \
91 /* Darwin has 128-bit long double support in libc in 10.4 and later.
92 Default to 128-bit long doubles even on earlier platforms for ABI
93 consistency; arithmetic will work even if libc and libm support is
96 #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
99 /* We want -fPIC by default, unless we're using -static to compile for
100 the kernel or some such. */
103 %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
104 %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
105 %{!static:%{!mdynamic-no-pic:-fPIC}}"
107 #define DARWIN_SUBARCH_SPEC " \
122 mcpu=power4:ppc970; \
126 /* crt2.o is at least partially required for 10.3.x and earlier. */
127 #define DARWIN_CRT2_SPEC \
128 "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
130 #undef SUBTARGET_EXTRA_SPECS
131 #define SUBTARGET_EXTRA_SPECS \
132 { "darwin_arch", "%{m64:ppc64;:ppc}" }, \
133 { "darwin_crt2", DARWIN_CRT2_SPEC }, \
134 { "darwin_subarch", DARWIN_SUBARCH_SPEC },
136 /* Output a .machine directive. */
137 #undef TARGET_ASM_FILE_START
138 #define TARGET_ASM_FILE_START rs6000_darwin_file_start
140 /* The "-faltivec" option should have been called "-maltivec" all
141 along. -ffix-and-continue and -findirect-data is for compatibility
142 for old compilers. */
144 #define SUBTARGET_OPTION_TRANSLATE_TABLE \
145 { "-ffix-and-continue", "-mfix-and-continue" }, \
146 { "-findirect-data", "-mfix-and-continue" }, \
147 { "-faltivec", "-maltivec -include altivec.h" }, \
148 { "-fno-altivec", "-mno-altivec" }, \
149 { "-Waltivec-long-deprecated", "-mwarn-altivec-long" }, \
150 { "-Wno-altivec-long-deprecated", "-mno-warn-altivec-long" }
152 /* Make both r2 and r13 available for allocation. */
156 /* Base register for access to local variables of the function. */
158 #undef HARD_FRAME_POINTER_REGNUM
159 #define HARD_FRAME_POINTER_REGNUM 30
161 #undef RS6000_PIC_OFFSET_TABLE_REGNUM
162 #define RS6000_PIC_OFFSET_TABLE_REGNUM 31
164 /* Pad the outgoing args area to 16 bytes instead of the usual 8. */
166 #undef STARTING_FRAME_OFFSET
167 #define STARTING_FRAME_OFFSET \
168 (FRAME_GROWS_DOWNWARD \
170 : (RS6000_ALIGN (current_function_outgoing_args_size, 16) \
173 #undef STACK_DYNAMIC_OFFSET
174 #define STACK_DYNAMIC_OFFSET(FUNDECL) \
175 (RS6000_ALIGN (current_function_outgoing_args_size, 16) \
176 + (STACK_POINTER_OFFSET))
178 /* These are used by -fbranch-probabilities */
179 #define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
180 #define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
181 "__TEXT,__unlikely,regular,pure_instructions"
183 /* Define cutoff for using external functions to save floating point.
184 Currently on Darwin, always use inline stores. */
186 #undef FP_SAVE_INLINE
187 #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
189 /* Darwin uses a function call if everything needs to be saved/restored. */
191 #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
193 /* The assembler wants the alternate register names, but without
194 leading percent sign. */
195 #undef REGISTER_NAMES
196 #define REGISTER_NAMES \
198 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
199 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
200 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
201 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
202 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
203 "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
204 "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
205 "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
206 "mq", "lr", "ctr", "ap", \
207 "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
209 "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
210 "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
211 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
212 "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
214 "spe_acc", "spefscr", \
218 /* This outputs NAME to FILE. */
220 #undef RS6000_OUTPUT_BASENAME
221 #define RS6000_OUTPUT_BASENAME(FILE, NAME) \
222 assemble_name (FILE, NAME)
224 /* Globalizing directive for a label. */
226 #define GLOBAL_ASM_OP "\t.globl "
227 #undef TARGET_ASM_GLOBALIZE_LABEL
229 /* This is how to output an internal label prefix. rs6000.c uses this
230 when generating traceback tables. */
231 /* Not really used for Darwin? */
233 #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
234 #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
235 fprintf (FILE, "%s", PREFIX)
237 /* This says how to output an assembler line to define a global common
240 #undef ASM_OUTPUT_ALIGNED_COMMON
241 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
243 unsigned HOST_WIDE_INT _new_size = SIZE; \
244 fputs (".comm ", (FILE)); \
245 RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
246 if (_new_size == 0) _new_size = 1; \
247 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", _new_size); \
250 /* Override the standard rs6000 definition. */
252 #undef ASM_COMMENT_START
253 #define ASM_COMMENT_START ";"
255 /* FP save and restore routines. */
256 #define SAVE_FP_PREFIX "._savef"
257 #define SAVE_FP_SUFFIX ""
258 #define RESTORE_FP_PREFIX "._restf"
259 #define RESTORE_FP_SUFFIX ""
261 /* This is how to output an assembler line that says to advance
262 the location counter to a multiple of 2**LOG bytes using the
263 "nop" instruction as padding. */
265 #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
270 ASM_OUTPUT_ALIGN (FILE,LOG); \
272 else /* nop == ori r0,r0,0 */ \
273 fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
276 /* Generate insns to call the profiler. */
278 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
279 /* This is supported in cctools 465 and later. The macro test
280 above prevents using it in earlier build environments. */
281 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
284 if ((MAX_SKIP) == 0) \
285 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
287 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
291 #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
293 /* Function name to call to do profiling. */
295 #define RS6000_MCOUNT "*mcount"
297 /* Default processor: G4, and G5 for 64-bit. */
299 #undef PROCESSOR_DEFAULT
300 #define PROCESSOR_DEFAULT PROCESSOR_PPC7400
301 #undef PROCESSOR_DEFAULT64
302 #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
304 /* Default target flag settings. Despite the fact that STMW/LMW
305 serializes, it's still a big code size win to use them. Use FSEL by
308 #undef TARGET_DEFAULT
309 #define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
312 /* Darwin only runs on PowerPC, so short-circuit POWER patterns. */
314 #define TARGET_POWER 0
316 /* Since Darwin doesn't do TOCs, stub this out. */
318 #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) 0
320 /* Unlike most other PowerPC targets, chars are signed, for
321 consistency with other Darwin architectures. */
323 #undef DEFAULT_SIGNED_CHAR
324 #define DEFAULT_SIGNED_CHAR (1)
326 /* Given an rtx X being reloaded into a reg required to be
327 in class CLASS, return the class of reg to actually use.
328 In general this is just CLASS; but on some machines
329 in some cases it is preferable to use a more restrictive class.
331 On the RS/6000, we have to return NO_REGS when we want to reload a
332 floating-point CONST_DOUBLE to force it to be copied to memory.
334 Don't allow R0 when loading the address of, or otherwise furtling with,
337 #undef PREFERRED_RELOAD_CLASS
338 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
340 && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
342 : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
343 && reg_class_subset_p (BASE_REGS, (CLASS))) \
345 : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
346 && (CLASS) == NON_SPECIAL_REGS) \
350 /* Fix for emit_group_load (): force large constants to be pushed via regs. */
351 #define ALWAYS_PUSH_CONSTS_USING_REGS_P 1
353 /* This now supports a natural alignment mode */
354 /* Darwin word-aligns FP doubles but doubleword-aligns 64-bit ints. */
355 #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
356 (TARGET_ALIGN_NATURAL ? (COMPUTED) : \
357 (TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \
358 ? get_inner_array_type (FIELD) \
359 : TREE_TYPE (FIELD)) == DFmode \
360 ? MIN ((COMPUTED), 32) : (COMPUTED)))
362 /* Darwin increases natural record alignment to doubleword if the first
363 field is an FP double while the FP fields remain word aligned. */
364 #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
365 ((TREE_CODE (STRUCT) == RECORD_TYPE \
366 || TREE_CODE (STRUCT) == UNION_TYPE \
367 || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
368 && TARGET_ALIGN_NATURAL == 0 \
369 ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
370 : (TREE_CODE (STRUCT) == VECTOR_TYPE \
371 && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
372 ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
373 : MAX ((COMPUTED), (SPECIFIED)))
375 /* Specify padding for the last element of a block move between
376 registers and memory. FIRST is nonzero if this is the only
378 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
379 (!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
381 /* XXX: Darwin supports neither .quad, or .llong, but it also doesn't
382 support 64 bit PowerPC either, so this just keeps things happy. */
383 #define DOUBLE_INT_ASM_OP "\t.quad\t"
385 /* For binary compatibility with 2.95; Darwin C APIs use bool from
386 stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
387 choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
388 #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
390 #undef REGISTER_TARGET_PRAGMAS
391 #define REGISTER_TARGET_PRAGMAS() \
394 DARWIN_REGISTER_TARGET_PRAGMAS(); \
395 targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
403 #define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"
405 #define HAS_MD_FALLBACK_FRAME_STATE_FOR 1
407 /* True, iff we're generating fast turn around debugging code. When
408 true, we arrange for function prologues to start with 5 nops so
409 that gdb may insert code to redirect them, and for data to be
410 accessed indirectly. The runtime uses this indirection to forward
411 references for data to the original instance of that data. */
413 #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
415 /* This is the reserved direct dispatch address for Objective-C. */
416 #define OFFS_MSGSEND_FAST 0xFFFEFF00
418 /* This is the reserved ivar address Objective-C. */
419 #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
421 /* Old versions of Mac OS/Darwin don't have C99 functions available. */
422 #undef TARGET_C99_FUNCTIONS
423 #define TARGET_C99_FUNCTIONS \
425 || (darwin_macosx_version_min \
426 && strverscmp (darwin_macosx_version_min, "10.3") >= 0))