forked from KolibriOS/kolibrios
125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
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/* Definitions for Intel 386 using GAS.
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Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004, 2007, 2008
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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
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public 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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/* Note that i386/seq-gas.h is a GAS configuration that does not use this
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file. */
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/* Use the bsd assembler syntax. */
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/* we need to do this because gas is really a bsd style assembler,
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* and so doesn't work well this these att-isms:
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*
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* ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
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* ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
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* used to define bss static space
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*
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* Next is the question of whether to uses underscores. RMS didn't
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* like this idea at first, but since it is now obvious that we
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* need this separate tm file for use with gas, at least to get
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* dbx debugging info, I think we should also switch to underscores.
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* We can keep i386v for real att style output, and the few
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* people who want both form will have to compile twice.
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*/
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/* these come from i386/bsd.h, but are specific to sequent */
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#undef DBX_NO_XREFS
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#undef DBX_CONTIN_LENGTH
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/* Ask for COFF symbols. */
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#define SDB_DEBUGGING_INFO 1
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/* Output #ident as a .ident. */
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#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
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/* In the past there was confusion as to what the argument to .align was
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in GAS. For the last several years the rule has been this: for a.out
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file formats that argument is LOG, and for all other file formats the
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argument is 1<<LOG.
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However, GAS now has .p2align and .balign pseudo-ops so to remove any
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doubt or guess work, and since this file is used for both a.out and other
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file formats, we use one of them. */
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#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
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#endif
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/* A C statement to output to the stdio stream FILE an assembler
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command to advance the location counter to a multiple of 1<<LOG
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bytes if it is within MAX_SKIP bytes.
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This is used to align code labels according to Intel recommendations. */
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#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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if ((LOG) != 0) {\
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if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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}
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#endif
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/* A C statement or statements which output an assembler instruction
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opcode to the stdio stream STREAM. The macro-operand PTR is a
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variable of type `char *' which points to the opcode name in its
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"internal" form--the form that is written in the machine description.
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GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
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So use `repe' instead. */
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#undef ASM_OUTPUT_OPCODE
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#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
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{ \
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if ((PTR)[0] == 'r' \
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&& (PTR)[1] == 'e' \
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&& (PTR)[2] == 'p') \
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{ \
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if ((PTR)[3] == 'z') \
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{ \
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fputs ("repe", (STREAM)); \
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(PTR) += 4; \
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} \
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else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
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{ \
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fputs ("repne", (STREAM)); \
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(PTR) += 5; \
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} \
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} \
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else \
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ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)); \
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}
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/* Define macro used to output shift-double opcodes when the shift
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count is in %cl. Some assemblers require %cl as an argument;
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some don't.
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GAS requires the %cl argument, so override i386/unix.h. */
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#undef SHIFT_DOUBLE_OMITS_COUNT
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#define SHIFT_DOUBLE_OMITS_COUNT 0
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/* The comment-starter string as GAS expects it. */
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#undef ASM_COMMENT_START
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#define ASM_COMMENT_START "#"
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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