| /* Definitions for Intel 386 using GAS. |
| Copyright (C) 1988-2015 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/>. */ |
| |
| /* Note that i386/seq-gas.h is a GAS configuration that does not use this |
| file. */ |
| |
| /* Use the bsd assembler syntax. */ |
| /* we need to do this because gas is really a bsd style assembler, |
| * and so doesn't work well this these att-isms: |
| * |
| * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas |
| * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be |
| * used to define bss static space |
| * |
| * Next is the question of whether to uses underscores. RMS didn't |
| * like this idea at first, but since it is now obvious that we |
| * need this separate tm file for use with gas, at least to get |
| * dbx debugging info, I think we should also switch to underscores. |
| * We can keep i386v for real att style output, and the few |
| * people who want both form will have to compile twice. |
| */ |
| |
| /* these come from i386/bsd.h, but are specific to sequent */ |
| #undef DBX_NO_XREFS |
| #undef DBX_CONTIN_LENGTH |
| |
| /* Ask for COFF symbols. */ |
| |
| #define SDB_DEBUGGING_INFO 1 |
| |
| /* Output #ident as a .ident. */ |
| |
| #undef TARGET_ASM_OUTPUT_IDENT |
| #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive |
| |
| /* In the past there was confusion as to what the argument to .align was |
| in GAS. For the last several years the rule has been this: for a.out |
| file formats that argument is LOG, and for all other file formats the |
| argument is 1<<LOG. |
| |
| However, GAS now has .p2align and .balign pseudo-ops so to remove any |
| doubt or guess work, and since this file is used for both a.out and other |
| file formats, we use one of them. */ |
| |
| #ifdef HAVE_GAS_BALIGN_AND_P2ALIGN |
| #undef ASM_OUTPUT_ALIGN |
| #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
| if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG)) |
| #endif |
| |
| /* A C statement to output to the stdio stream FILE an assembler |
| command to advance the location counter to a multiple of 1<<LOG |
| bytes if it is within MAX_SKIP bytes. |
| |
| This is used to align code labels according to Intel recommendations. */ |
| |
| #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN |
| # define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ |
| if ((LOG) != 0) {\ |
| if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ |
| else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ |
| } |
| #endif |
| |
| /* A C statement or statements which output an assembler instruction |
| opcode to the stdio stream STREAM. The macro-operand PTR is a |
| variable of type `char *' which points to the opcode name in its |
| "internal" form--the form that is written in the machine description. |
| |
| GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. |
| So use `repe' instead. */ |
| |
| #undef ASM_OUTPUT_OPCODE |
| #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ |
| { \ |
| if ((PTR)[0] == 'r' \ |
| && (PTR)[1] == 'e' \ |
| && (PTR)[2] == 'p') \ |
| { \ |
| if ((PTR)[3] == 'z') \ |
| { \ |
| fputs ("repe", (STREAM)); \ |
| (PTR) += 4; \ |
| } \ |
| else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ |
| { \ |
| fputs ("repne", (STREAM)); \ |
| (PTR) += 5; \ |
| } \ |
| } \ |
| else \ |
| ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)); \ |
| } |
| |
| /* Define macro used to output shift-double opcodes when the shift |
| count is in %cl. Some assemblers require %cl as an argument; |
| some don't. |
| |
| GAS requires the %cl argument, so override i386/unix.h. */ |
| |
| #undef SHIFT_DOUBLE_OMITS_COUNT |
| #define SHIFT_DOUBLE_OMITS_COUNT 0 |
| |
| /* The comment-starter string as GAS expects it. */ |
| #undef ASM_COMMENT_START |
| #define ASM_COMMENT_START "#" |
| |
| #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true |