1/* Definitions for Intel 386 using GAS.
2   Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004
3   Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING.  If not, write to
19the Free Software Foundation, 51 Franklin Street, Fifth Floor,
20Boston, MA 02110-1301, USA.  */
21
22/* Note that i386/seq-gas.h is a GAS configuration that does not use this
23   file.  */
24
25/* Use the bsd assembler syntax.  */
26/* we need to do this because gas is really a bsd style assembler,
27 * and so doesn't work well this these att-isms:
28 *
29 *  ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
30 *  ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
31 *   used to define bss static space
32 *
33 * Next is the question of whether to uses underscores.  RMS didn't
34 * like this idea at first, but since it is now obvious that we
35 * need this separate tm file for use with gas, at least to get
36 * dbx debugging info, I think we should also switch to underscores.
37 * We can keep i386v for real att style output, and the few
38 * people who want both form will have to compile twice.
39 */
40
41/* these come from i386/bsd.h, but are specific to sequent */
42#undef DBX_NO_XREFS
43#undef DBX_CONTIN_LENGTH
44
45/* Ask for COFF symbols.  */
46
47#define SDB_DEBUGGING_INFO 1
48
49/* Output #ident as a .ident.  */
50
51#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
52
53/* In the past there was confusion as to what the argument to .align was
54   in GAS.  For the last several years the rule has been this: for a.out
55   file formats that argument is LOG, and for all other file formats the
56   argument is 1<<LOG.
57
58   However, GAS now has .p2align and .balign pseudo-ops so to remove any
59   doubt or guess work, and since this file is used for both a.out and other
60   file formats, we use one of them.  */
61
62#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
63#undef ASM_OUTPUT_ALIGN
64#define ASM_OUTPUT_ALIGN(FILE,LOG) \
65  if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
66#endif
67
68/* A C statement to output to the stdio stream FILE an assembler
69   command to advance the location counter to a multiple of 1<<LOG
70   bytes if it is within MAX_SKIP bytes.
71
72   This is used to align code labels according to Intel recommendations.  */
73
74#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
75#  define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
76     if ((LOG) != 0) {\
77       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
78       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
79     }
80#endif
81
82/* A C statement or statements which output an assembler instruction
83   opcode to the stdio stream STREAM.  The macro-operand PTR is a
84   variable of type `char *' which points to the opcode name in its
85   "internal" form--the form that is written in the machine description.
86
87   GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
88   So use `repe' instead.  */
89
90#define ASM_OUTPUT_OPCODE(STREAM, PTR)	\
91{									\
92  if ((PTR)[0] == 'r'							\
93      && (PTR)[1] == 'e'						\
94      && (PTR)[2] == 'p')						\
95    {									\
96      if ((PTR)[3] == 'z')						\
97	{								\
98	  fprintf (STREAM, "repe");					\
99	  (PTR) += 4;							\
100	}								\
101      else if ((PTR)[3] == 'n' && (PTR)[4] == 'z')			\
102	{								\
103	  fprintf (STREAM, "repne");					\
104	  (PTR) += 5;							\
105	}								\
106    }									\
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/* Print opcodes the way that GAS expects them.  */
119#define GAS_MNEMONICS 1
120
121/* The comment-starter string as GAS expects it. */
122#undef ASM_COMMENT_START
123#define ASM_COMMENT_START "#"
124
125#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
126