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+/* Definitions of target machine for GNU compiler,
+ for IBM RS/6000 POWER running AIX.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
+ Free Software Foundation, 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/>. */
+
+/* Yes! We are AIX! */
+#define DEFAULT_ABI ABI_AIX
+#undef TARGET_AIX
+#define TARGET_AIX 1
+
+/* AIX always has a TOC. */
+#define TARGET_NO_TOC 0
+#define TARGET_TOC 1
+#define FIXED_R2 1
+
+/* AIX allows r13 to be used in 32-bit mode. */
+#define FIXED_R13 0
+
+/* 32-bit and 64-bit AIX stack boundary is 128. */
+#undef STACK_BOUNDARY
+#define STACK_BOUNDARY 128
+
+#undef TARGET_IEEEQUAD
+#define TARGET_IEEEQUAD 0
+
+/* The AIX linker will discard static constructors in object files before
+ collect has a chance to see them, so scan the object files directly. */
+#define COLLECT_EXPORT_LIST
+
+/* Handle #pragma weak and #pragma pack. */
+#define HANDLE_SYSV_PRAGMA 1
+
+/* This is the only version of nm that collect2 can work with. */
+#define REAL_NM_FILE_NAME "/usr/ucb/nm"
+
+#define USER_LABEL_PREFIX ""
+
+/* Don't turn -B into -L if the argument specifies a relative file name. */
+#define RELATIVE_PREFIX_NOT_LINKDIR
+
+/* Because of the above, we must have gcc search itself to find libgcc.a. */
+#define LINK_LIBGCC_SPECIAL_1
+
+#define MFWRAP_SPEC " %{static: %{fmudflap|fmudflapth: \
+ -brename:malloc,__wrap_malloc -brename:__real_malloc,malloc \
+ -brename:free,__wrap_free -brename:__real_free,free \
+ -brename:calloc,__wrap_calloc -brename:__real_calloc,calloc \
+ -brename:realloc,__wrap_realloc -brename:__real_realloc,realloc \
+ -brename:mmap,__wrap_mmap -brename:__real_mmap,mmap \
+ -brename:munmap,__wrap_munmap -brename:__real_munmap,munmap \
+ -brename:alloca,__wrap_alloca -brename:__real_alloca,alloca \
+} %{fmudflapth: \
+ -brename:pthread_create,__wrap_pthread_create \
+ -brename:__real_pthread_create,pthread_create \
+ -brename:pthread_join,__wrap_pthread_join \
+ -brename:__real_pthread_join,pthread_join \
+ -brename:pthread_exit,__wrap_pthread_exit \
+ -brename:__real_pthread_exit,pthread_exit \
+}} %{fmudflap|fmudflapth: \
+ -brename:main,__wrap_main -brename:__real_main,main \
+}"
+
+#define MFLIB_SPEC " %{fmudflap: -lmudflap \
+ %{static:%(link_gcc_c_sequence) -lmudflap}} \
+ %{fmudflapth: -lmudflapth -lpthread \
+ %{static:%(link_gcc_c_sequence) -lmudflapth}} "
+
+/* Names to predefine in the preprocessor for this target machine. */
+#define TARGET_OS_AIX_CPP_BUILTINS() \
+ do \
+ { \
+ builtin_define ("_IBMR2"); \
+ builtin_define ("_POWER"); \
+ builtin_define ("_AIX"); \
+ builtin_define ("_AIX32"); \
+ builtin_define ("_AIX41"); \
+ builtin_define ("_LONG_LONG"); \
+ if (TARGET_LONG_DOUBLE_128) \
+ builtin_define ("__LONGDOUBLE128"); \
+ builtin_assert ("system=unix"); \
+ builtin_assert ("system=aix"); \
+ } \
+ while (0)
+
+/* Define appropriate architecture macros for preprocessor depending on
+ target switches. */
+
+#define CPP_SPEC "%{posix: -D_POSIX_SOURCE}\
+ %{ansi: -D_ANSI_C_SOURCE}"
+
+#define CC1_SPEC "%(cc1_cpu)"
+
+#undef ASM_DEFAULT_SPEC
+#define ASM_DEFAULT_SPEC ""
+
+/* Tell the assembler to assume that all undefined names are external.
+
+ Don't do this until the fixed IBM assembler is more generally available.
+ When this becomes permanently defined, the ASM_OUTPUT_EXTERNAL,
+ ASM_OUTPUT_EXTERNAL_LIBCALL, and RS6000_OUTPUT_BASENAME macros will no
+ longer be needed. Also, the extern declaration of mcount in
+ rs6000_xcoff_file_start will no longer be needed. */
+
+/* #define ASM_SPEC "-u %(asm_cpu)" */
+
+/* Default location of syscalls.exp under AIX */
+#ifndef CROSS_DIRECTORY_STRUCTURE
+#define LINK_SYSCALLS_SPEC "-bI:/lib/syscalls.exp"
+#else
+#define LINK_SYSCALLS_SPEC ""
+#endif
+
+/* Default location of libg.exp under AIX */
+#ifndef CROSS_DIRECTORY_STRUCTURE
+#define LINK_LIBG_SPEC "-bexport:/usr/lib/libg.exp"
+#else
+#define LINK_LIBG_SPEC ""
+#endif
+
+/* Define the options for the binder: Start text at 512, align all segments
+ to 512 bytes, and warn if there is text relocation.
+
+ The -bhalt:4 option supposedly changes the level at which ld will abort,
+ but it also suppresses warnings about multiply defined symbols and is
+ used by the AIX cc command. So we use it here.
+
+ -bnodelcsect undoes a poor choice of default relating to multiply-defined
+ csects. See AIX documentation for more information about this.
+
+ -bM:SRE tells the linker that the output file is Shared REusable. Note
+ that to actually build a shared library you will also need to specify an
+ export list with the -Wl,-bE option. */
+
+#define LINK_SPEC "-T512 -H512 %{!r:-btextro} -bhalt:4 -bnodelcsect\
+%{static:-bnso %(link_syscalls) } \
+%{!shared:%{g*: %(link_libg) }} %{shared:-bM:SRE}"
+
+/* Profiled library versions are used by linking with special directories. */
+#define LIB_SPEC "%{pg:-L/lib/profiled -L/usr/lib/profiled}\
+%{p:-L/lib/profiled -L/usr/lib/profiled} %{!shared:%{g*:-lg}} -lc"
+
+/* Static linking with shared libstdc++ requires libsupc++ as well. */
+#define LIBSTDCXX_STATIC "-lstdc++ -lsupc++"
+
+/* This now supports a natural alignment mode. */
+/* AIX word-aligns FP doubles but doubleword-aligns 64-bit ints. */
+#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
+ ((TARGET_ALIGN_NATURAL == 0 \
+ && TYPE_MODE (strip_array_types (TREE_TYPE (FIELD))) == DFmode) \
+ ? MIN ((COMPUTED), 32) \
+ : (COMPUTED))
+
+/* AIX 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 \
+ ? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
+ : MAX ((COMPUTED), (SPECIFIED)))
+
+/* The AIX ABI isn't explicit on whether aggregates smaller than a
+ word/doubleword should be padded upward or downward. One could
+ reasonably assume that they follow the normal rules for structure
+ layout treating the parameter area as any other block of memory,
+ then map the reg param area to registers, i.e., pad upward, which
+ is the way IBM Compilers for AIX behave.
+ Setting both of the following defines results in this behavior. */
+#define AGGREGATE_PADDING_FIXED 1
+#define AGGREGATES_PAD_UPWARD_ALWAYS 1
+
+/* 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))
+
+/* Indicate that jump tables go in the text section. */
+
+#define JUMP_TABLES_IN_TEXT_SECTION 1
+
+/* Define any extra SPECS that the compiler needs to generate. */
+#undef SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS \
+ { "link_syscalls", LINK_SYSCALLS_SPEC }, \
+ { "link_libg", LINK_LIBG_SPEC }
+
+/* Define cutoff for using external functions to save floating point. */
+#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) == 62 || (FIRST_REG) == 63)
+/* And similarly for general purpose registers. */
+#define GP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 32)
+
+/* __throw will restore its own return address to be the same as the
+ return address of the function that the throw is being made to.
+ This is unfortunate, because we want to check the original
+ return address to see if we need to restore the TOC.
+ So we have to squirrel it away with this. */
+#define SETUP_FRAME_ADDRESSES() rs6000_aix_emit_builtin_unwind_init ()
+
+/* If the current unwind info (FS) does not contain explicit info
+ saving R2, then we have to do a minor amount of code reading to
+ figure out if it was saved. The big problem here is that the
+ code that does the save/restore is generated by the linker, so
+ we have no good way to determine at compile time what to do. */
+
+#define R_LR 65
+
+#ifdef __64BIT__
+#define MD_FROB_UPDATE_CONTEXT(CTX, FS) \
+ do { \
+ if ((FS)->regs.reg[2].how == REG_UNSAVED) \
+ { \
+ unsigned int *insn \
+ = (unsigned int *) \
+ _Unwind_GetGR ((CTX), R_LR); \
+ if (*insn == 0xE8410028) \
+ _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40); \
+ } \
+ } while (0)
+#else
+#define MD_FROB_UPDATE_CONTEXT(CTX, FS) \
+ do { \
+ if ((FS)->regs.reg[2].how == REG_UNSAVED) \
+ { \
+ unsigned int *insn \
+ = (unsigned int *) \
+ _Unwind_GetGR ((CTX), R_LR); \
+ if (*insn == 0x80410014) \
+ _Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20); \
+ } \
+ } while (0)
+#endif
+
+#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
+
+/* Print subsidiary information on the compiler version in use. */
+#define TARGET_VERSION ;
+
+/* No version of AIX fully supports AltiVec or 64-bit instructions in
+ 32-bit mode. */
+#define OS_MISSING_POWERPC64 1
+#define OS_MISSING_ALTIVEC 1
+
+/* WINT_TYPE */
+#define WINT_TYPE "int"