1/* Definitions for Intel 386 using GAS.
2   Copyright (C) 1988-2015 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along 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/* Ask for COFF symbols.  */
44
45#define SDB_DEBUGGING_INFO 1
46
47/* Output #ident as a .ident.  */
48
49#undef TARGET_ASM_OUTPUT_IDENT
50#define TARGET_ASM_OUTPUT_IDENT default_asm_output_ident_directive
51
52/* In the past there was confusion as to what the argument to .align was
53   in GAS.  For the last several years the rule has been this: for a.out
54   file formats that argument is LOG, and for all other file formats the
55   argument is 1<<LOG.
56
57   However, GAS now has .p2align and .balign pseudo-ops so to remove any
58   doubt or guess work, and since this file is used for both a.out and other
59   file formats, we use one of them.  */
60
61#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
62#undef ASM_OUTPUT_ALIGN
63#define ASM_OUTPUT_ALIGN(FILE,LOG) \
64  if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
65#endif
66
67/* A C statement to output to the stdio stream FILE an assembler
68   command to advance the location counter to a multiple of 1<<LOG
69   bytes if it is within MAX_SKIP bytes.
70
71   This is used to align code labels according to Intel recommendations.  */
72
73#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
74#  define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
75     if ((LOG) != 0) {\
76       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
77       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
78     }
79#endif
80
81/* A C statement or statements which output an assembler instruction
82   opcode to the stdio stream STREAM.  The macro-operand PTR is a
83   variable of type `char *' which points to the opcode name in its
84   "internal" form--the form that is written in the machine description.
85
86   GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
87   So use `repe' instead.  */
88
89#undef ASM_OUTPUT_OPCODE
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	  fputs ("repe", (STREAM));					\
99	  (PTR) += 4;							\
100	}								\
101      else if ((PTR)[3] == 'n' && (PTR)[4] == 'z')			\
102	{								\
103	  fputs ("repne", (STREAM));					\
104	  (PTR) += 5;							\
105	}								\
106    }									\
107  else									\
108    ASM_OUTPUT_AVX_PREFIX ((STREAM), (PTR));				\
109}
110
111/* Define macro used to output shift-double opcodes when the shift
112   count is in %cl.  Some assemblers require %cl as an argument;
113   some don't.
114
115   GAS requires the %cl argument, so override i386/unix.h.  */
116
117#undef SHIFT_DOUBLE_OMITS_COUNT
118#define SHIFT_DOUBLE_OMITS_COUNT 0
119
120/* The comment-starter string as GAS expects it. */
121#undef ASM_COMMENT_START
122#define ASM_COMMENT_START "#"
123
124#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
125