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9bf86ebb PR |
1 | /* Definitions for Intel 386 running system V with gnu tools |
2 | Copyright (C) 1988 Free Software Foundation, Inc. | |
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 | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* Note that i386/seq-gas.h is a GAS configuration that does not use this | |
21 | file. */ | |
22 | ||
23 | #include "i386/i386.h" | |
24 | ||
25 | #ifndef YES_UNDERSCORES | |
26 | /* Define this now, because i386/bsd.h tests it. */ | |
27 | #define NO_UNDERSCORES | |
28 | #endif | |
29 | ||
30 | /* Use the bsd assembler syntax. */ | |
31 | /* we need to do this because gas is really a bsd style assembler, | |
32 | * and so doesn't work well this these att-isms: | |
33 | * | |
34 | * ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas | |
35 | * ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be | |
36 | * used to define bss static space | |
37 | * | |
38 | * Next is the question of whether to uses underscores. RMS didn't | |
39 | * like this idea at first, but since it is now obvious that we | |
40 | * need this separate tm file for use with gas, at least to get | |
41 | * dbx debugging info, I think we should also switch to underscores. | |
42 | * We can keep i386v for real att style output, and the few | |
43 | * people who want both form will have to compile twice. | |
44 | */ | |
45 | ||
46 | #include "i386/bsd.h" | |
47 | ||
48 | /* these come from i386/bsd.h, but are specific to sequent */ | |
49 | #undef DBX_NO_XREFS | |
50 | #undef DBX_CONTIN_LENGTH | |
51 | ||
52 | /* Ask for COFF symbols. */ | |
53 | ||
54 | #define SDB_DEBUGGING_INFO | |
55 | ||
56 | /* Specify predefined symbols in preprocessor. */ | |
57 | ||
58 | #define CPP_PREDEFINES "-Dunix -Di386" | |
59 | #define CPP_SPEC "%{posix:-D_POSIX_SOURCE}" | |
60 | ||
61 | /* Allow #sccs in preprocessor. */ | |
62 | ||
63 | #define SCCS_DIRECTIVE | |
64 | ||
65 | /* Output #ident as a .ident. */ | |
66 | ||
67 | #define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME); | |
68 | ||
69 | /* Implicit library calls should use memcpy, not bcopy, etc. */ | |
70 | ||
71 | #define TARGET_MEM_FUNCTIONS | |
72 | ||
73 | #if 0 /* People say gas uses the log as the arg to .align. */ | |
74 | /* When using gas, .align N aligns to an N-byte boundary. */ | |
75 | ||
76 | #undef ASM_OUTPUT_ALIGN | |
77 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
78 | if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG)) | |
79 | #endif | |
80 | ||
81 | /* Align labels, etc. at 4-byte boundaries. | |
82 | For the 486, align to 16-byte boundary for sake of cache. */ | |
83 | ||
84 | #undef ASM_OUTPUT_ALIGN_CODE | |
85 | #define ASM_OUTPUT_ALIGN_CODE(FILE) \ | |
86 | fprintf ((FILE), "\t.align %d,0x90\n", \ | |
87 | TARGET_486 ? 4 : 2); /* Use log of 16 or log of 4 as arg. */ | |
88 | ||
89 | /* Align start of loop at 4-byte boundary. */ | |
90 | ||
91 | #undef ASM_OUTPUT_LOOP_ALIGN | |
92 | #define ASM_OUTPUT_LOOP_ALIGN(FILE) \ | |
93 | fprintf ((FILE), "\t.align 2,0x90\n"); /* Use log of 4 as arg. */ | |
94 | \f | |
95 | #undef ASM_FILE_START | |
96 | #define ASM_FILE_START(FILE) \ | |
97 | fprintf (FILE, "\t.file\t\"%s\"\n", dump_base_name); | |
98 | ||
99 | /* A C statement or statements which output an assembler instruction | |
100 | opcode to the stdio stream STREAM. The macro-operand PTR is a | |
101 | variable of type `char *' which points to the opcode name in its | |
102 | "internal" form--the form that is written in the machine description. | |
103 | ||
104 | GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic. | |
105 | So use `repe' instead. */ | |
106 | ||
107 | #define ASM_OUTPUT_OPCODE(STREAM, PTR) \ | |
108 | { \ | |
109 | if ((PTR)[0] == 'r' \ | |
110 | && (PTR)[1] == 'e' \ | |
111 | && (PTR)[2] == 'p') \ | |
112 | { \ | |
113 | if ((PTR)[3] == 'z') \ | |
114 | { \ | |
115 | fprintf (STREAM, "repe"); \ | |
116 | (PTR) += 4; \ | |
117 | } \ | |
118 | else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \ | |
119 | { \ | |
120 | fprintf (STREAM, "repne"); \ | |
121 | (PTR) += 5; \ | |
122 | } \ | |
123 | } \ | |
124 | } | |
125 | ||
126 | /* Define macro used to output shift-double opcodes when the shift | |
127 | count is in %cl. Some assemblers require %cl as an argument; | |
128 | some don't. | |
129 | ||
130 | GAS requires the %cl argument, so override i386/unix.h. */ | |
131 | ||
132 | #undef AS3_SHIFT_DOUBLE | |
133 | #define AS3_SHIFT_DOUBLE(a,b,c,d) AS3 (a,b,c,d) | |
134 | ||
135 | /* Print opcodes the way that GAS expects them. */ | |
136 | #define GAS_MNEMONICS 1 | |
137 | ||
138 | #ifdef NO_UNDERSCORES /* If user-symbols don't have underscores, | |
139 | then it must take more than `L' to identify | |
140 | a label that should be ignored. */ | |
141 | ||
142 | /* This is how to store into the string BUF | |
143 | the symbol_ref name of an internal numbered label where | |
144 | PREFIX is the class of label and NUM is the number within the class. | |
145 | This is suitable for output with `assemble_name'. */ | |
146 | ||
147 | #undef ASM_GENERATE_INTERNAL_LABEL | |
148 | #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \ | |
149 | sprintf ((BUF), ".%s%d", (PREFIX), (NUMBER)) | |
150 | ||
151 | /* This is how to output an internal numbered label where | |
152 | PREFIX is the class of label and NUM is the number within the class. */ | |
153 | ||
154 | #undef ASM_OUTPUT_INTERNAL_LABEL | |
155 | #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \ | |
156 | fprintf (FILE, ".%s%d:\n", PREFIX, NUM) | |
157 | ||
158 | #endif /* NO_UNDERSCORES */ |