317 lines
12 KiB
C
317 lines
12 KiB
C
/* Definitions of target machine for GNU compiler,
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for some generic XCOFF file format
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Copyright (C) 2001-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#define TARGET_OBJECT_FORMAT OBJECT_XCOFF
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/* The RS/6000 uses the XCOFF format. */
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#define XCOFF_DEBUGGING_INFO 1
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/* Define if the object format being used is COFF or a superset. */
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#define OBJECT_FORMAT_COFF
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/* Define the magic numbers that we recognize as COFF.
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AIX 4.3 adds U803XTOCMAGIC (0757) for 64-bit objects and AIX V5 adds
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U64_TOCMAGIC (0767), but collect2.c does not include files in the
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correct order to conditionally define the symbolic name in this macro.
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The AIX linker accepts import/export files as object files,
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so accept "#!" (0x2321) magic number. */
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#define MY_ISCOFF(magic) \
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((magic) == U802WRMAGIC || (magic) == U802ROMAGIC \
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|| (magic) == U802TOCMAGIC || (magic) == 0757 || (magic) == 0767 \
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|| (magic) == 0x2321)
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/* We don't have GAS for the RS/6000 yet, so don't write out special
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.stabs in cc1plus. */
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#define FASCIST_ASSEMBLER
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/* We define this to prevent the name mangler from putting dollar signs into
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function names. */
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#define NO_DOLLAR_IN_LABEL
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/* We define this to 0 so that gcc will never accept a dollar sign in a
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variable name. This is needed because the AIX assembler will not accept
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dollar signs. */
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#define DOLLARS_IN_IDENTIFIERS 0
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/* AIX .align pseudo-op accept value from 0 to 12, corresponding to
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log base 2 of the alignment in bytes; 12 = 4096 bytes = 32768 bits. */
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#define MAX_OFILE_ALIGNMENT 32768
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/* Default alignment factor for csect directives, chosen to honor
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BIGGEST_ALIGNMENT. */
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#define XCOFF_CSECT_DEFAULT_ALIGNMENT_STR "4"
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/* Return nonzero if this entry is to be written into the constant
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pool in a special way. We do so if this is a SYMBOL_REF, LABEL_REF
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or a CONST containing one of them. If -mfp-in-toc (the default),
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we also do this for floating-point constants. We actually can only
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do this if the FP formats of the target and host machines are the
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same, but we can't check that since not every file that uses these
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target macros includes real.h. We also do this when we can write the
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entry into the TOC and the entry is not larger than a TOC entry. */
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#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) \
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(TARGET_TOC \
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&& (GET_CODE (X) == SYMBOL_REF \
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|| (GET_CODE (X) == CONST && GET_CODE (XEXP (X, 0)) == PLUS \
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&& GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF) \
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|| GET_CODE (X) == LABEL_REF \
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|| (GET_CODE (X) == CONST_INT \
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&& GET_MODE_BITSIZE (MODE) <= GET_MODE_BITSIZE (Pmode)) \
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|| (GET_CODE (X) == CONST_DOUBLE \
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&& (TARGET_MINIMAL_TOC \
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|| (SCALAR_FLOAT_MODE_P (GET_MODE (X)) \
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&& ! TARGET_NO_FP_IN_TOC)))))
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#undef TARGET_DEBUG_UNWIND_INFO
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#define TARGET_DEBUG_UNWIND_INFO rs6000_xcoff_debug_unwind_info
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#define TARGET_ASM_OUTPUT_ANCHOR rs6000_xcoff_asm_output_anchor
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#define TARGET_ASM_GLOBALIZE_DECL_NAME rs6000_xcoff_asm_globalize_decl_name
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#define TARGET_ASM_GLOBALIZE_LABEL rs6000_xcoff_asm_globalize_label
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#define TARGET_ASM_INIT_SECTIONS rs6000_xcoff_asm_init_sections
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#define TARGET_ASM_RELOC_RW_MASK rs6000_xcoff_reloc_rw_mask
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#define TARGET_ASM_NAMED_SECTION rs6000_xcoff_asm_named_section
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#define TARGET_ASM_SELECT_SECTION rs6000_xcoff_select_section
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#define TARGET_ASM_SELECT_RTX_SECTION rs6000_xcoff_select_rtx_section
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#define TARGET_ASM_UNIQUE_SECTION rs6000_xcoff_unique_section
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#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
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#define TARGET_STRIP_NAME_ENCODING rs6000_xcoff_strip_name_encoding
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#define TARGET_SECTION_TYPE_FLAGS rs6000_xcoff_section_type_flags
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#ifdef HAVE_AS_TLS
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#define TARGET_ENCODE_SECTION_INFO rs6000_xcoff_encode_section_info
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#endif
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#define ASM_OUTPUT_ALIGNED_DECL_COMMON rs6000_xcoff_asm_output_aligned_decl_common
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/* FP save and restore routines. */
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#define SAVE_FP_PREFIX "._savef"
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#define SAVE_FP_SUFFIX ""
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#define RESTORE_FP_PREFIX "._restf"
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#define RESTORE_FP_SUFFIX ""
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/* Function name to call to do profiling. */
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#undef RS6000_MCOUNT
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#define RS6000_MCOUNT ".__mcount"
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/* This outputs NAME to FILE up to the first null or '['. */
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#define RS6000_OUTPUT_BASENAME(FILE, NAME) \
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assemble_name ((FILE), (*targetm.strip_name_encoding) (NAME))
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/* This is how to output the definition of a user-level label named NAME,
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such as the label on a static function or variable NAME. */
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#define ASM_OUTPUT_LABEL(FILE,NAME) \
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do { RS6000_OUTPUT_BASENAME (FILE, NAME); fputs (":\n", FILE); } while (0)
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/* This is how to output a command to make the user-level label named NAME
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defined for reference from other files. */
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/* Globalizing directive for a label. */
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#define GLOBAL_ASM_OP "\t.globl "
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#undef TARGET_ASM_FILE_START
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#define TARGET_ASM_FILE_START rs6000_xcoff_file_start
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#define TARGET_ASM_FILE_END rs6000_xcoff_file_end
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#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE false
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/* This macro produces the initial definition of a function name. */
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#undef ASM_DECLARE_FUNCTION_NAME
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#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
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rs6000_xcoff_declare_function_name ((FILE), (NAME), (DECL))
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#undef ASM_DECLARE_OBJECT_NAME
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#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
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rs6000_xcoff_declare_object_name ((FILE), (NAME), (DECL))
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/* Output a reference to SYM on FILE. */
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#define ASM_OUTPUT_SYMBOL_REF(FILE, SYM) \
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rs6000_output_symbol_ref (FILE, SYM)
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/* This says how to output an external.
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Dollar signs are converted to underscores. */
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#undef ASM_OUTPUT_EXTERNAL
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#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
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{ char *buffer = (char *) alloca (strlen (NAME) + 1); \
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char *p; \
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int dollar_inside = 0; \
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strcpy (buffer, NAME); \
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p = strchr (buffer, '$'); \
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while (p) { \
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*p = '_'; \
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dollar_inside++; \
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p = strchr (p + 1, '$'); \
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} \
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if (dollar_inside) { \
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fputs ("\t.extern .", FILE); \
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RS6000_OUTPUT_BASENAME (FILE, buffer); \
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putc ('\n', FILE); \
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fprintf (FILE, "\t.rename .%s,\".%s\"\n", buffer, NAME); \
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} \
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}
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/* This is how to output a reference to a user-level label named NAME.
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`assemble_name' uses this. */
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#define ASM_OUTPUT_LABELREF(FILE,NAME) \
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asm_fprintf ((FILE), "%U%s", rs6000_xcoff_strip_dollar (NAME));
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/* This is how to output an internal label prefix. rs6000.c uses this
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when generating traceback tables. */
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#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
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fprintf (FILE, "%s..", PREFIX)
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/* This is how to output a label for a jump table. Arguments are the same as
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for (*targetm.asm_out.internal_label), except the insn for the jump table is
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passed. */
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#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLEINSN) \
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{ ASM_OUTPUT_ALIGN (FILE, 2); (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); }
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/* This is how to store into the string LABEL
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the symbol_ref name of an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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This is suitable for output with `assemble_name'. */
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#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
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sprintf (LABEL, "*%s..%u", rs6000_xcoff_strip_dollar (PREFIX), (unsigned) (NUM))
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/* This is how to output an assembler line to define N characters starting
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at P to FILE. */
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#define ASM_OUTPUT_ASCII(FILE, P, N) output_ascii ((FILE), (P), (N))
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/* This is how to advance the location counter by SIZE bytes. */
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#define SKIP_ASM_OP "\t.space "
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#define ASM_OUTPUT_SKIP(FILE,SIZE) \
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fprintf (FILE, "%s" HOST_WIDE_INT_PRINT_UNSIGNED"\n", SKIP_ASM_OP, (SIZE))
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/* This says how to output an assembler line
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to define a global common symbol. */
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#define COMMON_ASM_OP "\t.comm "
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/* This says how to output an assembler line
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to define a local common symbol.
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The assembler in AIX 6.1 and later supports an alignment argument.
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For earlier releases of AIX, we try to maintain
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alignment after preceding TOC section if it was aligned
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for 64-bit mode. */
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#define LOCAL_COMMON_ASM_OP "\t.lcomm "
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#if TARGET_AIX_VERSION >= 61
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#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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do { fputs (LOCAL_COMMON_ASM_OP, (FILE)); \
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RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
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if ((ALIGN) > 32) \
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fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%s%u_,%u\n", \
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(SIZE), xcoff_bss_section_name, \
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floor_log2 ((ALIGN) / BITS_PER_UNIT), \
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floor_log2 ((ALIGN) / BITS_PER_UNIT)); \
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else if ((SIZE) > 4) \
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fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%s3_,3\n", \
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(SIZE), xcoff_bss_section_name); \
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else \
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fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%s,2\n", \
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(SIZE), xcoff_bss_section_name); \
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} while (0)
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#endif
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#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
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do { fputs (LOCAL_COMMON_ASM_OP, (FILE)); \
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RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
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fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%s\n", \
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(TARGET_32BIT ? (SIZE) : (ROUNDED)), \
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xcoff_bss_section_name); \
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} while (0)
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#ifdef HAVE_AS_TLS
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#define ASM_OUTPUT_TLS_COMMON(FILE, DECL, NAME, SIZE) \
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do { fputs (COMMON_ASM_OP, (FILE)); \
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RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
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fprintf ((FILE), "[UL]," HOST_WIDE_INT_PRINT_UNSIGNED"\n", \
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(SIZE)); \
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} while (0)
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#endif
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/* This is how we tell the assembler that two symbols have the same value. */
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#define SET_ASM_OP "\t.set "
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/* This is how we tell the assembler to equate two values.
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The semantic of AIX assembler's .set do not correspond to middle-end expectations.
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We output aliases as alternative symbols in the front of the definition
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via DECLARE_FUNCTION_NAME and DECLARE_OBJECT_NAME.
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We still need to define this macro to let middle-end know that aliases are
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supported.
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*/
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) do { } while (0)
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/* Used by rs6000_assemble_integer, among others. */
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/* Used by rs6000_assemble_integer, among others. */
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#define DOUBLE_INT_ASM_OP "\t.llong\t"
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/* Output before instructions. */
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#define TEXT_SECTION_ASM_OP "\t.csect .text[PR]"
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/* Output before writable data. */
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#define DATA_SECTION_ASM_OP \
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"\t.csect .data[RW]," XCOFF_CSECT_DEFAULT_ALIGNMENT_STR
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/* The eh_frames are put in the read-only text segment.
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Local code labels/function will also be in the local text segment so use
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PC relative addressing.
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Global symbols must be in the data segment to allow loader relocations.
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So use DW_EH_PE_indirect to allocate a slot in the local data segment.
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There is no constant offset to this data segment from the text segment,
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so use addressing relative to the data segment.
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*/
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#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
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(((GLOBAL) ? DW_EH_PE_indirect | DW_EH_PE_datarel : DW_EH_PE_pcrel) \
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| (TARGET_64BIT ? DW_EH_PE_sdata8 : DW_EH_PE_sdata4))
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#define EH_FRAME_THROUGH_COLLECT2 1
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#define EH_TABLES_CAN_BE_READ_ONLY 1
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/* AIX Assembler implicitly assumes DWARF 64 bit extension in 64 bit mode. */
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#define DWARF_OFFSET_SIZE PTR_SIZE
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#define ASM_OUTPUT_DWARF_PCREL(FILE,SIZE,LABEL) \
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rs6000_asm_output_dwarf_pcrel ((FILE), (SIZE), (LABEL));
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#define ASM_OUTPUT_DWARF_DATAREL(FILE,SIZE,LABEL) \
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rs6000_asm_output_dwarf_datarel ((FILE), (SIZE), (LABEL));
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#define MAKE_DECL_ONE_ONLY(DECL) (DECL_WEAK (DECL) = 1)
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