Mercurial > hg > CbC > CbC_gcc
annotate gcc/config/i386/gas.h @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Definitions for Intel 386 using GAS. |
| 131 | 2 Copyright (C) 1988-2018 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify | |
| 7 it under the terms of the GNU General Public License as published by | |
| 8 the Free Software Foundation; either version 3, or (at your option) | |
| 9 any later version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, | |
| 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 | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
| 20 /* Note that i386/seq-gas.h is a GAS configuration that does not use this | |
| 21 file. */ | |
| 22 | |
| 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 | |
| 39 /* these come from i386/bsd.h, but are specific to sequent */ | |
| 40 #undef DBX_NO_XREFS | |
| 41 #undef DBX_CONTIN_LENGTH | |
| 42 | |
| 43 /* Output #ident as a .ident. */ | |
| 44 | |
| 111 | 45 #undef TARGET_ASM_OUTPUT_IDENT |
| 46 #define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive | |
| 0 | 47 |
| 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. */ | |
| 56 | |
| 57 #ifdef HAVE_GAS_BALIGN_AND_P2ALIGN | |
| 58 #undef ASM_OUTPUT_ALIGN | |
| 59 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
| 131 | 60 if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1 << (LOG)) |
| 0 | 61 #endif |
| 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) \ | |
| 131 | 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 } | |
| 0 | 77 #endif |
| 78 | |
| 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 | |
| 87 #undef ASM_OUTPUT_OPCODE | |
| 88 #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ | |
| 89 { \ | |
| 90 if ((PTR)[0] == 'r' \ | |
| 91 && (PTR)[1] == 'e' \ | |
| 92 && (PTR)[2] == 'p') \ | |
| 93 { \ | |
| 94 if ((PTR)[3] == 'z') \ | |
| 95 { \ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
96 fputs ("repe", (STREAM)); \ |
| 0 | 97 (PTR) += 4; \ |
| 98 } \ | |
| 99 else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ | |
| 100 { \ | |
|
55
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
101 fputs ("repne", (STREAM)); \ |
| 0 | 102 (PTR) += 5; \ |
| 103 } \ | |
| 104 } \ | |
| 105 else \ | |
| 106 ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR)); \ | |
| 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 /* The comment-starter string as GAS expects it. */ | |
| 119 #undef ASM_COMMENT_START | |
| 120 #define ASM_COMMENT_START "#" | |
| 121 | |
| 122 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true |