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1.1 root 1: /* Definitions for Unix assembler syntax for the Intel 80386.
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: /* This file defines the aspects of assembler syntax
21: that are the same for all the i386 Unix systems
22: (though they may differ in non-Unix systems). */
23:
24: /* Define some concatenation macros to concatenate an opcode
25: and one, two or three operands. In other assembler syntaxes
26: they may alter the order of ther operands. */
27:
28: /* Note that the other files fail to use these
29: in some of the places where they should. */
30:
31: #ifdef __STDC__
32: #define AS2(a,b,c) #a " " #b "," #c
33: #define AS3(a,b,c,d) #a " " #b "," #c "," #d
34: #define AS1(a,b) #a " " #b
35: #else
36: #define AS1(a,b) "a b"
37: #define AS2(a,b,c) "a b,c"
38: #define AS3(a,b,c,d) "a b,c,d"
39: #endif
40:
41: /* Output the size-letter for an opcode.
42: CODE is the letter used in an operand spec (L, B, W, S or Q).
43: CH is the corresponding lower case letter
44: (except if CODE is L then CH is `l'). */
45: #define PUT_OP_SIZE(CODE,CH,FILE) putc (CH,(FILE))
46:
47: /* Opcode suffix for fullword insn. */
48: #define L_SIZE "l"
49:
50: /* Prefix for register names in this syntax. */
51: #define RP "%"
52:
53: /* Prefix for immediate operands in this syntax. */
54: #define IP "$"
55:
56: /* Indirect call instructions should use `*'. */
57: #define USE_STAR 1
58:
59: /* Prefix for a memory-operand X. */
60: #define PRINT_PTR(X, FILE)
61:
62: /* Delimiters that surround base reg and index reg. */
63: #define ADDR_BEG(FILE) putc('(', (FILE))
64: #define ADDR_END(FILE) putc(')', (FILE))
65:
66: /* Print an index register (whose rtx is IREG). */
67: #define PRINT_IREG(FILE,IREG) \
68: do \
69: { fputs (",", (FILE)); PRINT_REG ((IREG), 0, (FILE)); } \
70: while (0)
71:
72: /* Print an index scale factor SCALE. */
73: #define PRINT_SCALE(FILE,SCALE) \
74: if ((SCALE) != 1) fprintf ((FILE), ",%d", (SCALE))
75:
76: /* Print a base/index combination.
77: BREG is the base reg rtx, IREG is the index reg rtx,
78: and SCALE is the index scale factor (an integer). */
79:
80: #define PRINT_B_I_S(BREG,IREG,SCALE,FILE) \
81: { ADDR_BEG (FILE); \
82: if (BREG) PRINT_REG ((BREG), 0, (FILE)); \
83: if ((IREG) != 0) \
84: { PRINT_IREG ((FILE), (IREG)); \
85: PRINT_SCALE ((FILE), (SCALE)); } \
86: ADDR_END (FILE); }
87:
88: /* Define the syntax of pseudo-ops, labels and comments. */
89:
90: /* String containing the assembler's comment-starter. */
91:
92: #define ASM_COMMENT_START "/"
93: #define COMMENT_BEGIN "/"
94:
95: /* Output to assembler file text saying following lines
96: may contain character constants, extra white space, comments, etc. */
97:
98: #define ASM_APP_ON "/APP\n"
99:
100: /* Output to assembler file text saying following lines
101: no longer contain unusual constructs. */
102:
103: #define ASM_APP_OFF "/NO_APP\n"
104:
105: /* Output before read-only data. */
106:
107: #define TEXT_SECTION_ASM_OP ".text"
108:
109: /* Output before writable (initialized) data. */
110:
111: #define DATA_SECTION_ASM_OP ".data"
112:
113: /* Output before writable (uninitialized) data. */
114:
115: #define BSS_SECTION_ASM_OP ".bss"
116:
117: /* This is how to output a command to make the user-level label named NAME
118: defined for reference from other files. */
119:
120: #define ASM_GLOBALIZE_LABEL(FILE,NAME) \
121: (fputs (".globl ", FILE), assemble_name (FILE, NAME), fputs ("\n", FILE))
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