/* Definitions for Intel 386 using GAS.
|
/* Definitions for Intel 386 using GAS.
|
Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004, 2007
|
Copyright (C) 1988, 1993, 1994, 1996, 2002, 2004, 2007
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
|
|
This file is part of GCC.
|
This file is part of GCC.
|
|
|
GCC is free software; you can redistribute it and/or modify
|
GCC is free software; you can redistribute it and/or modify
|
it under the terms of the GNU General Public License as published by
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3, or (at your option)
|
the Free Software Foundation; either version 3, or (at your option)
|
any later version.
|
any later version.
|
|
|
GCC is distributed in the hope that it will be useful,
|
GCC is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with GCC; see the file COPYING3. If not see
|
along with GCC; see the file COPYING3. If not see
|
<http://www.gnu.org/licenses/>. */
|
<http://www.gnu.org/licenses/>. */
|
|
|
/* Note that i386/seq-gas.h is a GAS configuration that does not use this
|
/* Note that i386/seq-gas.h is a GAS configuration that does not use this
|
file. */
|
file. */
|
|
|
/* Use the bsd assembler syntax. */
|
/* Use the bsd assembler syntax. */
|
/* we need to do this because gas is really a bsd style assembler,
|
/* we need to do this because gas is really a bsd style assembler,
|
* and so doesn't work well this these att-isms:
|
* and so doesn't work well this these att-isms:
|
*
|
*
|
* ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
|
* ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
|
* ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
|
* ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
|
* used to define bss static space
|
* used to define bss static space
|
*
|
*
|
* Next is the question of whether to uses underscores. RMS didn't
|
* Next is the question of whether to uses underscores. RMS didn't
|
* like this idea at first, but since it is now obvious that we
|
* like this idea at first, but since it is now obvious that we
|
* need this separate tm file for use with gas, at least to get
|
* need this separate tm file for use with gas, at least to get
|
* dbx debugging info, I think we should also switch to underscores.
|
* dbx debugging info, I think we should also switch to underscores.
|
* We can keep i386v for real att style output, and the few
|
* We can keep i386v for real att style output, and the few
|
* people who want both form will have to compile twice.
|
* people who want both form will have to compile twice.
|
*/
|
*/
|
|
|
/* these come from i386/bsd.h, but are specific to sequent */
|
/* these come from i386/bsd.h, but are specific to sequent */
|
#undef DBX_NO_XREFS
|
#undef DBX_NO_XREFS
|
#undef DBX_CONTIN_LENGTH
|
#undef DBX_CONTIN_LENGTH
|
|
|
/* Ask for COFF symbols. */
|
/* Ask for COFF symbols. */
|
|
|
#define SDB_DEBUGGING_INFO 1
|
#define SDB_DEBUGGING_INFO 1
|
|
|
/* Output #ident as a .ident. */
|
/* Output #ident as a .ident. */
|
|
|
#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
|
#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
|
|
|
/* In the past there was confusion as to what the argument to .align was
|
/* In the past there was confusion as to what the argument to .align was
|
in GAS. For the last several years the rule has been this: for a.out
|
in GAS. For the last several years the rule has been this: for a.out
|
file formats that argument is LOG, and for all other file formats the
|
file formats that argument is LOG, and for all other file formats the
|
argument is 1<<LOG.
|
argument is 1<<LOG.
|
|
|
However, GAS now has .p2align and .balign pseudo-ops so to remove any
|
However, GAS now has .p2align and .balign pseudo-ops so to remove any
|
doubt or guess work, and since this file is used for both a.out and other
|
doubt or guess work, and since this file is used for both a.out and other
|
file formats, we use one of them. */
|
file formats, we use one of them. */
|
|
|
#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
|
#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
|
#undef ASM_OUTPUT_ALIGN
|
#undef ASM_OUTPUT_ALIGN
|
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
|
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
|
if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
|
if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
|
#endif
|
#endif
|
|
|
/* A C statement to output to the stdio stream FILE an assembler
|
/* A C statement to output to the stdio stream FILE an assembler
|
command to advance the location counter to a multiple of 1<<LOG
|
command to advance the location counter to a multiple of 1<<LOG
|
bytes if it is within MAX_SKIP bytes.
|
bytes if it is within MAX_SKIP bytes.
|
|
|
This is used to align code labels according to Intel recommendations. */
|
This is used to align code labels according to Intel recommendations. */
|
|
|
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
|
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
|
# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
|
# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
|
if ((LOG) != 0) {\
|
if ((LOG) != 0) {\
|
if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
|
if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
|
else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
|
else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
|
}
|
}
|
#endif
|
#endif
|
|
|
/* A C statement or statements which output an assembler instruction
|
/* A C statement or statements which output an assembler instruction
|
opcode to the stdio stream STREAM. The macro-operand PTR is a
|
opcode to the stdio stream STREAM. The macro-operand PTR is a
|
variable of type `char *' which points to the opcode name in its
|
variable of type `char *' which points to the opcode name in its
|
"internal" form--the form that is written in the machine description.
|
"internal" form--the form that is written in the machine description.
|
|
|
GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
|
GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
|
So use `repe' instead. */
|
So use `repe' instead. */
|
|
|
#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
|
#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
|
{ \
|
{ \
|
if ((PTR)[0] == 'r' \
|
if ((PTR)[0] == 'r' \
|
&& (PTR)[1] == 'e' \
|
&& (PTR)[1] == 'e' \
|
&& (PTR)[2] == 'p') \
|
&& (PTR)[2] == 'p') \
|
{ \
|
{ \
|
if ((PTR)[3] == 'z') \
|
if ((PTR)[3] == 'z') \
|
{ \
|
{ \
|
fprintf (STREAM, "repe"); \
|
fprintf (STREAM, "repe"); \
|
(PTR) += 4; \
|
(PTR) += 4; \
|
} \
|
} \
|
else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
|
else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
|
{ \
|
{ \
|
fprintf (STREAM, "repne"); \
|
fprintf (STREAM, "repne"); \
|
(PTR) += 5; \
|
(PTR) += 5; \
|
} \
|
} \
|
} \
|
} \
|
}
|
}
|
|
|
/* Define macro used to output shift-double opcodes when the shift
|
/* Define macro used to output shift-double opcodes when the shift
|
count is in %cl. Some assemblers require %cl as an argument;
|
count is in %cl. Some assemblers require %cl as an argument;
|
some don't.
|
some don't.
|
|
|
GAS requires the %cl argument, so override i386/unix.h. */
|
GAS requires the %cl argument, so override i386/unix.h. */
|
|
|
#undef SHIFT_DOUBLE_OMITS_COUNT
|
#undef SHIFT_DOUBLE_OMITS_COUNT
|
#define SHIFT_DOUBLE_OMITS_COUNT 0
|
#define SHIFT_DOUBLE_OMITS_COUNT 0
|
|
|
/* Print opcodes the way that GAS expects them. */
|
/* Print opcodes the way that GAS expects them. */
|
#define GAS_MNEMONICS 1
|
#define GAS_MNEMONICS 1
|
|
|
/* The comment-starter string as GAS expects it. */
|
/* The comment-starter string as GAS expects it. */
|
#undef ASM_COMMENT_START
|
#undef ASM_COMMENT_START
|
#define ASM_COMMENT_START "#"
|
#define ASM_COMMENT_START "#"
|
|
|
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
|
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
|
|
|
