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6e9e65c6 | 1 | /* Definitions for Intel 386 using GAS. |
7adcbafe | 2 | Copyright (C) 1988-2022 Free Software Foundation, Inc. |
c3878c43 | 3 | |
e20285ad | 4 | This file is part of GCC. |
c3878c43 | 5 | |
e20285ad | 6 | GCC is free software; you can redistribute it and/or modify |
c3878c43 | 7 | it under the terms of the GNU General Public License as published by |
2f83c7d6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
c3878c43 RS |
9 | any later version. |
10 | ||
e20285ad | 11 | GCC is distributed in the hope that it will be useful, |
c3878c43 RS |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
2f83c7d6 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
c3878c43 | 19 | |
3382566a | 20 | /* Note that i386/seq-gas.h is a GAS configuration that does not use this |
892a2d68 | 21 | file. */ |
c3878c43 | 22 | |
c3878c43 RS |
23 | /* Use the bsd assembler syntax. */ |
24 | /* we need to do this because gas is really a bsd style assembler, | |
25 | * and so doesn't work well this these att-isms: | |
26 | * | |
27 | * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas | |
28 | * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be | |
29 | * used to define bss static space | |
30 | * | |
31 | * Next is the question of whether to uses underscores. RMS didn't | |
32 | * like this idea at first, but since it is now obvious that we | |
33 | * need this separate tm file for use with gas, at least to get | |
ca60bd93 | 34 | * debugging info, I think we should also switch to underscores. |
c3878c43 RS |
35 | * We can keep i386v for real att style output, and the few |
36 | * people who want both form will have to compile twice. | |
37 | */ | |
38 | ||
c3878c43 RS |
39 | /* Output #ident as a .ident. */ |
40 | ||
a8781821 SB |
41 | #undef TARGET_ASM_OUTPUT_IDENT |
42 | #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive | |
c3878c43 | 43 | |
6e9e65c6 DE |
44 | /* In the past there was confusion as to what the argument to .align was |
45 | in GAS. For the last several years the rule has been this: for a.out | |
46 | file formats that argument is LOG, and for all other file formats the | |
47 | argument is 1<<LOG. | |
48 | ||
49 | However, GAS now has .p2align and .balign pseudo-ops so to remove any | |
50 | doubt or guess work, and since this file is used for both a.out and other | |
51 | file formats, we use one of them. */ | |
c3878c43 | 52 | |
00ccc16d | 53 | #ifdef HAVE_GAS_BALIGN_AND_P2ALIGN |
c3878c43 | 54 | #undef ASM_OUTPUT_ALIGN |
6e9e65c6 | 55 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
dd047c67 | 56 | if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1 << (LOG)) |
d45e8c4c | 57 | #endif |
c3878c43 | 58 | \f |
726c68df RS |
59 | /* A C statement or statements which output an assembler instruction |
60 | opcode to the stdio stream STREAM. The macro-operand PTR is a | |
61 | variable of type `char *' which points to the opcode name in its | |
62 | "internal" form--the form that is written in the machine description. | |
63 | ||
64 | GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. | |
65 | So use `repe' instead. */ | |
66 | ||
95879c72 | 67 | #undef ASM_OUTPUT_OPCODE |
726c68df RS |
68 | #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ |
69 | { \ | |
70 | if ((PTR)[0] == 'r' \ | |
71 | && (PTR)[1] == 'e' \ | |
84d82177 | 72 | && (PTR)[2] == 'p') \ |
726c68df | 73 | { \ |
84d82177 JVA |
74 | if ((PTR)[3] == 'z') \ |
75 | { \ | |
87da3843 | 76 | fputs ("repe", (STREAM)); \ |
84d82177 JVA |
77 | (PTR) += 4; \ |
78 | } \ | |
79 | else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ | |
80 | { \ | |
87da3843 | 81 | fputs ("repne", (STREAM)); \ |
84d82177 JVA |
82 | (PTR) += 5; \ |
83 | } \ | |
726c68df | 84 | } \ |
95879c72 L |
85 | else \ |
86 | ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)); \ | |
726c68df | 87 | } |
56c0e8fa JVA |
88 | |
89 | /* Define macro used to output shift-double opcodes when the shift | |
90 | count is in %cl. Some assemblers require %cl as an argument; | |
91 | some don't. | |
92 | ||
892a2d68 | 93 | GAS requires the %cl argument, so override i386/unix.h. */ |
56c0e8fa | 94 | |
dedaa36d SC |
95 | #undef SHIFT_DOUBLE_OMITS_COUNT |
96 | #define SHIFT_DOUBLE_OMITS_COUNT 0 | |
56c0e8fa | 97 | |
7e233208 RK |
98 | /* The comment-starter string as GAS expects it. */ |
99 | #undef ASM_COMMENT_START | |
100 | #define ASM_COMMENT_START "#" | |
101 | ||
1bc7c5b6 | 102 | #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true |