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/* Definitions for Intel 386 using GAS. |
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Copyright (C) 1988-2015 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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. */ |
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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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#undef TARGET_ASM_OUTPUT_IDENT |
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#define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive |
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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< |
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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< |
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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 |