freebsd-dev/contrib/gcc/config/i386/gas.h
David E. O'Brien 1952e2e1c1 Enlist the FreeBSD-CURRENT users as testers of what is to become Gcc 3.1.0.
These bits are taken from the FSF anoncvs repo on 1-Feb-2002 08:20 PST.
2002-02-01 18:16:02 +00:00

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/* Definitions for Intel 386 using GAS.
Copyright (C) 1988, 1993, 1994, 1996 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC 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.
GNU CC 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 GNU CC; 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. */
#include "i386/i386.h"
#ifndef YES_UNDERSCORES
/* Define this now, because i386/bsd.h tests it. */
#define NO_UNDERSCORES
#endif
/* 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.
*/
#include "i386/bsd.h"
/* 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
/* Specify predefined symbols in preprocessor. */
#define CPP_PREDEFINES "-Dunix"
#define CPP_SPEC "%(cpp_cpu) %{posix:-D_POSIX_SOURCE}"
/* Allow #sccs in preprocessor. */
#define SCCS_DIRECTIVE
/* 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
#ifdef NO_UNDERSCORES /* If user-symbols don't have underscores,
then it must take more than `L' to identify
a label that should be ignored. */
/* This is how to store into the string BUF
the symbol_ref name of an internal numbered label where
PREFIX is the class of label and NUM is the number within the class.
This is suitable for output with `assemble_name'. */
#undef ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \
sprintf ((BUF), ".%s%ld", (PREFIX), (long)(NUMBER))
/* This is how to output an internal numbered label where
PREFIX is the class of label and NUM is the number within the class. */
#undef ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
#endif /* NO_UNDERSCORES */
/* Output at beginning of assembler file. */
/* The .file command should always begin the output. */
#undef ASM_FILE_START
#define ASM_FILE_START(FILE) \
do { \
if (ix86_asm_dialect == ASM_INTEL) \
fputs ("\t.intel_syntax\n", FILE); \
output_file_directive (FILE, main_input_filename); \
} while (0)