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6e9e65c6 | 1 | /* Definitions for Intel 386 using GAS. |
85ec4feb | 2 | Copyright (C) 1988-2018 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 | |
34 | * dbx debugging info, I think we should also switch to underscores. | |
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 | ||
3382566a | 39 | /* these come from i386/bsd.h, but are specific to sequent */ |
c3878c43 RS |
40 | #undef DBX_NO_XREFS |
41 | #undef DBX_CONTIN_LENGTH | |
42 | ||
c3878c43 RS |
43 | /* Output #ident as a .ident. */ |
44 | ||
a8781821 SB |
45 | #undef TARGET_ASM_OUTPUT_IDENT |
46 | #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive | |
c3878c43 | 47 | |
6e9e65c6 DE |
48 | /* In the past there was confusion as to what the argument to .align was |
49 | in GAS. For the last several years the rule has been this: for a.out | |
50 | file formats that argument is LOG, and for all other file formats the | |
51 | argument is 1<<LOG. | |
52 | ||
53 | However, GAS now has .p2align and .balign pseudo-ops so to remove any | |
54 | doubt or guess work, and since this file is used for both a.out and other | |
55 | file formats, we use one of them. */ | |
c3878c43 | 56 | |
00ccc16d | 57 | #ifdef HAVE_GAS_BALIGN_AND_P2ALIGN |
c3878c43 | 58 | #undef ASM_OUTPUT_ALIGN |
6e9e65c6 | 59 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
dd047c67 | 60 | if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1 << (LOG)) |
d45e8c4c | 61 | #endif |
9e423e6d JW |
62 | |
63 | /* A C statement to output to the stdio stream FILE an assembler | |
64 | command to advance the location counter to a multiple of 1<<LOG | |
65 | bytes if it is within MAX_SKIP bytes. | |
66 | ||
67 | This is used to align code labels according to Intel recommendations. */ | |
68 | ||
69 | #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN | |
70 | # define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ | |
dd047c67 DV |
71 | if ((LOG) != 0) { \ |
72 | if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1<<(LOG))-1) \ | |
73 | fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ | |
74 | else \ | |
75 | fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ | |
76 | } | |
9e423e6d | 77 | #endif |
c3878c43 | 78 | \f |
726c68df RS |
79 | /* A C statement or statements which output an assembler instruction |
80 | opcode to the stdio stream STREAM. The macro-operand PTR is a | |
81 | variable of type `char *' which points to the opcode name in its | |
82 | "internal" form--the form that is written in the machine description. | |
83 | ||
84 | GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. | |
85 | So use `repe' instead. */ | |
86 | ||
95879c72 | 87 | #undef ASM_OUTPUT_OPCODE |
726c68df RS |
88 | #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ |
89 | { \ | |
90 | if ((PTR)[0] == 'r' \ | |
91 | && (PTR)[1] == 'e' \ | |
84d82177 | 92 | && (PTR)[2] == 'p') \ |
726c68df | 93 | { \ |
84d82177 JVA |
94 | if ((PTR)[3] == 'z') \ |
95 | { \ | |
87da3843 | 96 | fputs ("repe", (STREAM)); \ |
84d82177 JVA |
97 | (PTR) += 4; \ |
98 | } \ | |
99 | else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ | |
100 | { \ | |
87da3843 | 101 | fputs ("repne", (STREAM)); \ |
84d82177 JVA |
102 | (PTR) += 5; \ |
103 | } \ | |
726c68df | 104 | } \ |
95879c72 L |
105 | else \ |
106 | ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)); \ | |
726c68df | 107 | } |
56c0e8fa JVA |
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 | ||
892a2d68 | 113 | GAS requires the %cl argument, so override i386/unix.h. */ |
56c0e8fa | 114 | |
dedaa36d SC |
115 | #undef SHIFT_DOUBLE_OMITS_COUNT |
116 | #define SHIFT_DOUBLE_OMITS_COUNT 0 | |
56c0e8fa | 117 | |
7e233208 RK |
118 | /* The comment-starter string as GAS expects it. */ |
119 | #undef ASM_COMMENT_START | |
120 | #define ASM_COMMENT_START "#" | |
121 | ||
1bc7c5b6 | 122 | #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true |