125 lines
4.2 KiB
C
125 lines
4.2 KiB
C
/* Definitions for Intel 386 using GAS.
|
||
Copyright (C) 1988, 1993, 1994, 1996, 2002 Free Software Foundation, Inc.
|
||
|
||
This file is part of GCC.
|
||
|
||
GCC is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2, or (at your option)
|
||
any later version.
|
||
|
||
GCC is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with GCC; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
/* Note that i386/seq-gas.h is a GAS configuration that does not use this
|
||
file. */
|
||
|
||
/* Use the bsd assembler syntax. */
|
||
/* we need to do this because gas is really a bsd style assembler,
|
||
* and so doesn't work well this these att-isms:
|
||
*
|
||
* 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
|
||
* used to define bss static space
|
||
*
|
||
* 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
|
||
* need this separate tm file for use with gas, at least to get
|
||
* dbx debugging info, I think we should also switch to underscores.
|
||
* We can keep i386v for real att style output, and the few
|
||
* people who want both form will have to compile twice.
|
||
*/
|
||
|
||
/* these come from i386/bsd.h, but are specific to sequent */
|
||
#undef DBX_NO_XREFS
|
||
#undef DBX_CONTIN_LENGTH
|
||
|
||
/* Ask for COFF symbols. */
|
||
|
||
#define SDB_DEBUGGING_INFO 1
|
||
|
||
/* Output #ident as a .ident. */
|
||
|
||
#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
|
||
|
||
/* Implicit library calls should use memcpy, not bcopy, etc. */
|
||
|
||
#define TARGET_MEM_FUNCTIONS
|
||
|
||
/* 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
|
||
file formats that argument is LOG, and for all other file formats the
|
||
argument is 1<<LOG.
|
||
|
||
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
|
||
file formats, we use one of them. */
|
||
|
||
#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN
|
||
#undef ASM_OUTPUT_ALIGN
|
||
#define ASM_OUTPUT_ALIGN(FILE,LOG) \
|
||
if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
|
||
#endif
|
||
|
||
/* A C statement to output to the stdio stream FILE an assembler
|
||
command to advance the location counter to a multiple of 1<<LOG
|
||
bytes if it is within MAX_SKIP bytes.
|
||
|
||
This is used to align code labels according to Intel recommendations. */
|
||
|
||
#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
|
||
# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
|
||
if ((LOG) != 0) {\
|
||
if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
|
||
else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
|
||
}
|
||
#endif
|
||
|
||
/* A C statement or statements which output an assembler instruction
|
||
opcode to the stdio stream STREAM. The macro-operand PTR is a
|
||
variable of type `char *' which points to the opcode name in its
|
||
"internal" form--the form that is written in the machine description.
|
||
|
||
GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
|
||
So use `repe' instead. */
|
||
|
||
#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
|
||
{ \
|
||
if ((PTR)[0] == 'r' \
|
||
&& (PTR)[1] == 'e' \
|
||
&& (PTR)[2] == 'p') \
|
||
{ \
|
||
if ((PTR)[3] == 'z') \
|
||
{ \
|
||
fprintf (STREAM, "repe"); \
|
||
(PTR) += 4; \
|
||
} \
|
||
else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
|
||
{ \
|
||
fprintf (STREAM, "repne"); \
|
||
(PTR) += 5; \
|
||
} \
|
||
} \
|
||
}
|
||
|
||
/* Define macro used to output shift-double opcodes when the shift
|
||
count is in %cl. Some assemblers require %cl as an argument;
|
||
some don't.
|
||
|
||
GAS requires the %cl argument, so override i386/unix.h. */
|
||
|
||
#undef SHIFT_DOUBLE_OMITS_COUNT
|
||
#define SHIFT_DOUBLE_OMITS_COUNT 0
|
||
|
||
/* Print opcodes the way that GAS expects them. */
|
||
#define GAS_MNEMONICS 1
|
||
|
||
#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
|