+// SPDX-License-Identifier: GPL-3.0-or-later
/* Definitions of target machine for GNU compiler,
for IBM RS/6000 POWER running AIX.
- Copyright (C) 2000-2013 Free Software Foundation, Inc.
+ Copyright (C) 2000-2023 Free Software Foundation, Inc.
This file is part of GCC.
#define TARGET_AIX_OS 1
/* AIX always has a TOC. */
-#define TARGET_NO_TOC 0
-#define TARGET_TOC 1
+#define TARGET_HAS_TOC 1
#define FIXED_R2 1
/* AIX allows r13 to be used in 32-bit mode. */
#undef STACK_BOUNDARY
#define STACK_BOUNDARY 128
+/* Offset within stack frame to start allocating local variables at.
+ If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
+ first local allocated. Otherwise, it is the offset to the BEGINNING
+ of the first local allocated.
+
+ On the RS/6000, the frame pointer is the same as the stack pointer,
+ except for dynamic allocations. So we start after the fixed area and
+ outgoing parameter area.
+
+ If the function uses dynamic stack space (CALLS_ALLOCA is set), that
+ space needs to be aligned to STACK_BOUNDARY, i.e. the sum of the
+ sizes of the fixed area and the parameter area must be a multiple of
+ STACK_BOUNDARY. */
+
+#undef RS6000_STARTING_FRAME_OFFSET
+#define RS6000_STARTING_FRAME_OFFSET \
+ (cfun->calls_alloca \
+ ? RS6000_ALIGN (crtl->outgoing_args_size + RS6000_SAVE_AREA, 16) \
+ : (RS6000_ALIGN (crtl->outgoing_args_size, 16) + RS6000_SAVE_AREA))
+
+/* Offset from the stack pointer register to an item dynamically
+ allocated on the stack, e.g., by `alloca'.
+
+ The default value for this macro is `STACK_POINTER_OFFSET' plus the
+ length of the outgoing arguments. The default is correct for most
+ machines. See `function.cc' for details.
+
+ This value must be a multiple of STACK_BOUNDARY (hard coded in
+ `emit-rtl.cc'). */
+#undef STACK_DYNAMIC_OFFSET
+#define STACK_DYNAMIC_OFFSET(FUNDECL) \
+ RS6000_ALIGN (crtl->outgoing_args_size.to_constant () \
+ + STACK_POINTER_OFFSET, 16)
+
#undef TARGET_IEEEQUAD
#define TARGET_IEEEQUAD 0
+#undef TARGET_IEEEQUAD_DEFAULT
+#define TARGET_IEEEQUAD_DEFAULT 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
+/* On AIX, initialisers specified with -binitfini are called in breadth-first
+ order.
+ e.g. if a.out depends on lib1.so, the init function for a.out is called before
+ the init function for lib1.so.
+
+ To ensure global C++ constructors in linked libraries are run before global
+ C++ constructors from the current module, there is additional symbol scanning
+ logic in collect2.
+
+ The global initialiser/finaliser functions are named __GLOBAL_AIXI_{libname}
+ and __GLOBAL_AIXD_{libname} and are exported from each shared library.
+
+ collect2 will detect these symbols when they exist in shared libraries that
+ the current program is being linked against. All such initiliser functions
+ will be called prior to the constructors of the current program, and
+ finaliser functions called after destructors.
+
+ Reference counting generated by collect2 will ensure that constructors are
+ only invoked once in the case of multiple dependencies on a library.
+
+ -binitfini is still used in parallel to this solution.
+ This handles the case where a library is loaded through dlopen(), and also
+ handles the option -blazy.
+*/
+#define COLLECT_SHARED_INIT_FUNC(STREAM, FUNC) \
+ fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_initname, (FUNC))
+#define COLLECT_SHARED_FINI_FUNC(STREAM, FUNC) \
+ fprintf ((STREAM), "void %s() {\n\t%s();\n}\n", aix_shared_fininame, (FUNC))
+
#if HAVE_AS_REF
/* Issue assembly directives that create a reference to the given DWARF table
identifier label from the current function section. This is defined to
- ensure we drag frame frame tables associated with needed function bodies in
+ ensure we drag frame tables associated with needed function bodies in
a link with garbage collection activated. */
#define ASM_OUTPUT_DWARF_TABLE_REF rs6000_aix_asm_output_dwarf_table_ref
#endif
{ \
builtin_define ("_IBMR2"); \
builtin_define ("_POWER"); \
- builtin_define ("__powerpc__"); \
- builtin_define ("__PPC__"); \
builtin_define ("__unix__"); \
builtin_define ("_AIX"); \
builtin_define ("_AIX32"); \
builtin_define ("__LONGDOUBLE128"); \
builtin_assert ("system=unix"); \
builtin_assert ("system=aix"); \
+ if (TARGET_64BIT) \
+ { \
+ builtin_define ("__PPC__"); \
+ builtin_define ("__PPC64__"); \
+ builtin_define ("__powerpc__"); \
+ builtin_define ("__powerpc64__"); \
+ builtin_assert ("cpu=powerpc64"); \
+ builtin_assert ("machine=powerpc64"); \
+ } \
+ else \
+ { \
+ builtin_define ("__PPC__"); \
+ builtin_define ("__powerpc__"); \
+ builtin_assert ("cpu=powerpc"); \
+ builtin_assert ("machine=powerpc"); \
+ } \
} \
while (0)
/* 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) \
+#define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \
+ (TARGET_ALIGN_NATURAL == 0 \
+ ? rs6000_special_adjust_field_align (TYPE, COMPUTED) \
: (COMPUTED))
/* AIX increases natural record alignment to doubleword if the first
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))
+ (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE))
/* Indicate that jump tables go in the text section. */
/* Static stack checking is supported by means of probes. */
#define STACK_CHECK_STATIC_BUILTIN 1
+
+/* Use standard DWARF numbering for DWARF debugging information. */
+#define RS6000_USE_DWARF_NUMBERING
+
+#define TARGET_PRECOMPUTE_TLS_P rs6000_aix_precompute_tls_p
+
+/* Replace -m64 with -maix64 and -m32 with -maix32. */
+#undef SUBTARGET_DRIVER_SELF_SPECS
+#define SUBTARGET_DRIVER_SELF_SPECS \
+"%{m64:-maix64} %<m64", \
+"%{m32:-maix32} %<m32"
projects / thirdparty / gcc.git / blobdiff