1/* Definitions for Intel 386 using GAS. 2 Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004 3 Free Software Foundation, Inc. 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GCC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to 19the Free Software Foundation, 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22/* Note that i386/seq-gas.h is a GAS configuration that does not use this 23 file. */ 24 25/* Use the bsd assembler syntax. */ 26/* we need to do this because gas is really a bsd style assembler, 27 * and so doesn't work well this these att-isms: 28 * 29 * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas 30 * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be 31 * used to define bss static space 32 * 33 * Next is the question of whether to uses underscores. RMS didn't 34 * like this idea at first, but since it is now obvious that we 35 * need this separate tm file for use with gas, at least to get 36 * dbx debugging info, I think we should also switch to underscores. 37 * We can keep i386v for real att style output, and the few 38 * people who want both form will have to compile twice. 39 */ 40 41/* these come from i386/bsd.h, but are specific to sequent */ 42#undef DBX_NO_XREFS 43#undef DBX_CONTIN_LENGTH 44 45/* Ask for COFF symbols. */ 46 47#define SDB_DEBUGGING_INFO 1 48 49/* Output #ident as a .ident. */ 50 51#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME); 52 53/* In the past there was confusion as to what the argument to .align was 54 in GAS. For the last several years the rule has been this: for a.out 55 file formats that argument is LOG, and for all other file formats the 56 argument is 1<<LOG. 57 58 However, GAS now has .p2align and .balign pseudo-ops so to remove any 59 doubt or guess work, and since this file is used for both a.out and other 60 file formats, we use one of them. */ 61 62#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN 63#undef ASM_OUTPUT_ALIGN 64#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 65 if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG)) 66#endif 67 68/* A C statement to output to the stdio stream FILE an assembler 69 command to advance the location counter to a multiple of 1<<LOG 70 bytes if it is within MAX_SKIP bytes. 71 72 This is used to align code labels according to Intel recommendations. */ 73 74#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 75# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ 76 if ((LOG) != 0) {\ 77 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 78 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 79 } 80#endif 81 82/* A C statement or statements which output an assembler instruction 83 opcode to the stdio stream STREAM. The macro-operand PTR is a 84 variable of type `char *' which points to the opcode name in its 85 "internal" form--the form that is written in the machine description. 86 87 GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. 88 So use `repe' instead. */ 89 90#define ASM_OUTPUT_OPCODE(STREAM, PTR) \ 91{ \ 92 if ((PTR)[0] == 'r' \ 93 && (PTR)[1] == 'e' \ 94 && (PTR)[2] == 'p') \ 95 { \ 96 if ((PTR)[3] == 'z') \ 97 { \ 98 fprintf (STREAM, "repe"); \ 99 (PTR) += 4; \ 100 } \ 101 else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ 102 { \ 103 fprintf (STREAM, "repne"); \ 104 (PTR) += 5; \ 105 } \ 106 } \ 107} 108 109/* Define macro used to output shift-double opcodes when the shift 110 count is in %cl. Some assemblers require %cl as an argument; 111 some don't. 112 113 GAS requires the %cl argument, so override i386/unix.h. */ 114 115#undef SHIFT_DOUBLE_OMITS_COUNT 116#define SHIFT_DOUBLE_OMITS_COUNT 0 117 118/* Print opcodes the way that GAS expects them. */ 119#define GAS_MNEMONICS 1 120 121/* The comment-starter string as GAS expects it. */ 122#undef ASM_COMMENT_START 123#define ASM_COMMENT_START "#" 124 125#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 126