]>
Commit | Line | Data |
---|---|---|
6e9e65c6 DE |
1 | /* Definitions for Intel 386 using GAS. |
2 | Copyright (C) 1988, 1993, 1994, 1996 Free Software Foundation, Inc. | |
c3878c43 RS |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC 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 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC 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 GNU CC; see the file COPYING. If not, write to | |
97aadbb9 RK |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
c3878c43 | 20 | |
3382566a | 21 | /* Note that i386/seq-gas.h is a GAS configuration that does not use this |
56c0e8fa | 22 | file. */ |
c3878c43 | 23 | |
5ef886db | 24 | #include "i386/i386.h" |
82ac9846 | 25 | |
d92761c0 | 26 | #ifndef YES_UNDERSCORES |
3382566a | 27 | /* Define this now, because i386/bsd.h tests it. */ |
82ac9846 | 28 | #define NO_UNDERSCORES |
25720d37 | 29 | #endif |
82ac9846 | 30 | |
c3878c43 RS |
31 | /* Use the bsd assembler syntax. */ |
32 | /* we need to do this because gas is really a bsd style assembler, | |
33 | * and so doesn't work well this these att-isms: | |
34 | * | |
35 | * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas | |
36 | * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be | |
37 | * used to define bss static space | |
38 | * | |
39 | * Next is the question of whether to uses underscores. RMS didn't | |
40 | * like this idea at first, but since it is now obvious that we | |
41 | * need this separate tm file for use with gas, at least to get | |
42 | * dbx debugging info, I think we should also switch to underscores. | |
43 | * We can keep i386v for real att style output, and the few | |
44 | * people who want both form will have to compile twice. | |
45 | */ | |
46 | ||
3382566a | 47 | #include "i386/bsd.h" |
c3878c43 | 48 | |
3382566a | 49 | /* these come from i386/bsd.h, but are specific to sequent */ |
c3878c43 RS |
50 | #undef DBX_NO_XREFS |
51 | #undef DBX_CONTIN_LENGTH | |
52 | ||
8cac6b1a RS |
53 | /* Ask for COFF symbols. */ |
54 | ||
55 | #define SDB_DEBUGGING_INFO | |
56 | ||
c3878c43 RS |
57 | /* Specify predefined symbols in preprocessor. */ |
58 | ||
8524774e SC |
59 | #define CPP_PREDEFINES "-Dunix" |
60 | #define CPP_SPEC "%(cpp_cpu) %[cpp_cpu] %{posix:-D_POSIX_SOURCE}" | |
c3878c43 RS |
61 | |
62 | /* Allow #sccs in preprocessor. */ | |
63 | ||
64 | #define SCCS_DIRECTIVE | |
65 | ||
66 | /* Output #ident as a .ident. */ | |
67 | ||
68 | #define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME); | |
69 | ||
c3878c43 RS |
70 | /* Implicit library calls should use memcpy, not bcopy, etc. */ |
71 | ||
72 | #define TARGET_MEM_FUNCTIONS | |
73 | ||
6e9e65c6 DE |
74 | /* In the past there was confusion as to what the argument to .align was |
75 | in GAS. For the last several years the rule has been this: for a.out | |
76 | file formats that argument is LOG, and for all other file formats the | |
77 | argument is 1<<LOG. | |
78 | ||
79 | However, GAS now has .p2align and .balign pseudo-ops so to remove any | |
80 | doubt or guess work, and since this file is used for both a.out and other | |
81 | file formats, we use one of them. */ | |
c3878c43 | 82 | |
d45e8c4c | 83 | #if 0 /* ??? However, not every port uses binutils 2.6 yet. */ |
c3878c43 | 84 | #undef ASM_OUTPUT_ALIGN |
6e9e65c6 DE |
85 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
86 | if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG)) | |
d45e8c4c | 87 | #endif |
9e423e6d JW |
88 | |
89 | /* A C statement to output to the stdio stream FILE an assembler | |
90 | command to advance the location counter to a multiple of 1<<LOG | |
91 | bytes if it is within MAX_SKIP bytes. | |
92 | ||
93 | This is used to align code labels according to Intel recommendations. */ | |
94 | ||
95 | #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN | |
96 | # define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ | |
97 | if ((LOG)!=0) \ | |
98 | if ((MAX_SKIP)==0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ | |
99 | else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)) | |
100 | #endif | |
c3878c43 | 101 | \f |
726c68df RS |
102 | /* A C statement or statements which output an assembler instruction |
103 | opcode to the stdio stream STREAM. The macro-operand PTR is a | |
104 | variable of type `char *' which points to the opcode name in its | |
105 | "internal" form--the form that is written in the machine description. | |
106 | ||
107 | GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. | |
108 | So use `repe' instead. */ | |
109 | ||
110 | #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ | |
111 | { \ | |
112 | if ((PTR)[0] == 'r' \ | |
113 | && (PTR)[1] == 'e' \ | |
84d82177 | 114 | && (PTR)[2] == 'p') \ |
726c68df | 115 | { \ |
84d82177 JVA |
116 | if ((PTR)[3] == 'z') \ |
117 | { \ | |
118 | fprintf (STREAM, "repe"); \ | |
119 | (PTR) += 4; \ | |
120 | } \ | |
121 | else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ | |
122 | { \ | |
123 | fprintf (STREAM, "repne"); \ | |
124 | (PTR) += 5; \ | |
125 | } \ | |
726c68df RS |
126 | } \ |
127 | } | |
56c0e8fa JVA |
128 | |
129 | /* Define macro used to output shift-double opcodes when the shift | |
130 | count is in %cl. Some assemblers require %cl as an argument; | |
131 | some don't. | |
132 | ||
3382566a | 133 | GAS requires the %cl argument, so override i386/unix.h. */ |
56c0e8fa | 134 | |
dedaa36d SC |
135 | #undef SHIFT_DOUBLE_OMITS_COUNT |
136 | #define SHIFT_DOUBLE_OMITS_COUNT 0 | |
56c0e8fa JVA |
137 | |
138 | /* Print opcodes the way that GAS expects them. */ | |
139 | #define GAS_MNEMONICS 1 | |
e28d6e8a RS |
140 | |
141 | #ifdef NO_UNDERSCORES /* If user-symbols don't have underscores, | |
142 | then it must take more than `L' to identify | |
143 | a label that should be ignored. */ | |
144 | ||
145 | /* This is how to store into the string BUF | |
146 | the symbol_ref name of an internal numbered label where | |
147 | PREFIX is the class of label and NUM is the number within the class. | |
148 | This is suitable for output with `assemble_name'. */ | |
149 | ||
150 | #undef ASM_GENERATE_INTERNAL_LABEL | |
151 | #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \ | |
152 | sprintf ((BUF), ".%s%d", (PREFIX), (NUMBER)) | |
153 | ||
154 | /* This is how to output an internal numbered label where | |
155 | PREFIX is the class of label and NUM is the number within the class. */ | |
156 | ||
157 | #undef ASM_OUTPUT_INTERNAL_LABEL | |
158 | #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \ | |
159 | fprintf (FILE, ".%s%d:\n", PREFIX, NUM) | |
160 | ||
161 | #endif /* NO_UNDERSCORES */ |