[gcc.git] / gcc / config / i386 / gas.h

/* 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) %[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.  */

#if 0 /* ??? However, not every port uses binutils 2.6 yet.  */
#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
\f
/* 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%d", (PREFIX), (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 */
Commit	Line	Data
6e9e65c6 DE	1	/* Definitions for Intel 386 using GAS.
6e9e65c6 DE	2	Copyright (C) 1988, 1993, 1994, 1996 Free Software Foundation, Inc.
c3878c43 RS	3
	4	This file is part of GNU CC.
	5
	6	GNU CC is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GNU CC is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU CC; see the file COPYING. If not, write to
97aadbb9 RK	18	the Free Software Foundation, 59 Temple Place - Suite 330,
97aadbb9 RK	19	Boston, MA 02111-1307, USA. */
c3878c43	20
3382566a	21	/* Note that i386/seq-gas.h is a GAS configuration that does not use this
56c0e8fa	22	file. */
c3878c43	23
5ef886db	24	#include "i386/i386.h"
82ac9846	25
d92761c0	26	#ifndef YES_UNDERSCORES
3382566a	27	/* Define this now, because i386/bsd.h tests it. */
82ac9846	28	#define NO_UNDERSCORES
25720d37	29	#endif
82ac9846	30
c3878c43 RS	31	/* Use the bsd assembler syntax. */
	32	/* we need to do this because gas is really a bsd style assembler,
	33	* and so doesn't work well this these att-isms:
	34	*
	35	* ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
	36	* ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
	37	* used to define bss static space
	38	*
	39	* Next is the question of whether to uses underscores. RMS didn't
	40	* like this idea at first, but since it is now obvious that we
	41	* need this separate tm file for use with gas, at least to get
	42	* dbx debugging info, I think we should also switch to underscores.
	43	* We can keep i386v for real att style output, and the few
	44	* people who want both form will have to compile twice.
	45	*/
	46
3382566a	47	#include "i386/bsd.h"
c3878c43	48
3382566a	49	/* these come from i386/bsd.h, but are specific to sequent */
c3878c43 RS	50	#undef DBX_NO_XREFS
	51	#undef DBX_CONTIN_LENGTH
	52
8cac6b1a RS	53	/* Ask for COFF symbols. */
	54
	55	#define SDB_DEBUGGING_INFO
	56
c3878c43 RS	57	/* Specify predefined symbols in preprocessor. */
c3878c43 RS	58
8524774e SC	59	#define CPP_PREDEFINES "-Dunix"
8524774e SC	60	#define CPP_SPEC "%(cpp_cpu) %[cpp_cpu] %{posix:-D_POSIX_SOURCE}"
c3878c43 RS	61
	62	/* Allow #sccs in preprocessor. */
	63
	64	#define SCCS_DIRECTIVE
	65
	66	/* Output #ident as a .ident. */
	67
	68	#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
	69
c3878c43 RS	70	/* Implicit library calls should use memcpy, not bcopy, etc. */
	71
	72	#define TARGET_MEM_FUNCTIONS
	73
6e9e65c6 DE	74	/* In the past there was confusion as to what the argument to .align was
	75	in GAS. For the last several years the rule has been this: for a.out
	76	file formats that argument is LOG, and for all other file formats the
	77	argument is 1<<LOG.
	78
	79	However, GAS now has .p2align and .balign pseudo-ops so to remove any
	80	doubt or guess work, and since this file is used for both a.out and other
	81	file formats, we use one of them. */
c3878c43	82
d45e8c4c	83	#if 0 /* ??? However, not every port uses binutils 2.6 yet. */
c3878c43	84	#undef ASM_OUTPUT_ALIGN
6e9e65c6 DE	85	#define ASM_OUTPUT_ALIGN(FILE,LOG) \
6e9e65c6 DE	86	if ((LOG)!=0) fprintf ((FILE), "\t.balign %d\n", 1<<(LOG))
d45e8c4c	87	#endif
9e423e6d JW	88
	89	/* A C statement to output to the stdio stream FILE an assembler
	90	command to advance the location counter to a multiple of 1<<LOG
	91	bytes if it is within MAX_SKIP bytes.
	92
	93	This is used to align code labels according to Intel recommendations. */
	94
	95	#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
	96	# define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
	97	if ((LOG)!=0) \
	98	if ((MAX_SKIP)==0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
	99	else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP))
	100	#endif
c3878c43	101	\f
726c68df RS	102	/* A C statement or statements which output an assembler instruction
	103	opcode to the stdio stream STREAM. The macro-operand PTR is a
	104	variable of type `char *' which points to the opcode name in its
	105	"internal" form--the form that is written in the machine description.
	106
	107	GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
	108	So use `repe' instead. */
	109
	110	#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
	111	{ \
	112	if ((PTR)[0] == 'r' \
	113	&& (PTR)[1] == 'e' \
84d82177	114	&& (PTR)[2] == 'p') \
726c68df	115	{ \
84d82177 JVA	116	if ((PTR)[3] == 'z') \
	117	{ \
	118	fprintf (STREAM, "repe"); \
	119	(PTR) += 4; \
	120	} \
	121	else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
	122	{ \
	123	fprintf (STREAM, "repne"); \
	124	(PTR) += 5; \
	125	} \
726c68df RS	126	} \
726c68df RS	127	}
56c0e8fa JVA	128
	129	/* Define macro used to output shift-double opcodes when the shift
	130	count is in %cl. Some assemblers require %cl as an argument;
	131	some don't.
	132
3382566a	133	GAS requires the %cl argument, so override i386/unix.h. */
56c0e8fa	134
dedaa36d SC	135	#undef SHIFT_DOUBLE_OMITS_COUNT
dedaa36d SC	136	#define SHIFT_DOUBLE_OMITS_COUNT 0
56c0e8fa JVA	137
	138	/* Print opcodes the way that GAS expects them. */
	139	#define GAS_MNEMONICS 1
e28d6e8a RS	140
	141	#ifdef NO_UNDERSCORES /* If user-symbols don't have underscores,
	142	then it must take more than `L' to identify
	143	a label that should be ignored. */
	144
	145	/* This is how to store into the string BUF
	146	the symbol_ref name of an internal numbered label where
	147	PREFIX is the class of label and NUM is the number within the class.
	148	This is suitable for output with `assemble_name'. */
	149
	150	#undef ASM_GENERATE_INTERNAL_LABEL
	151	#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \
	152	sprintf ((BUF), ".%s%d", (PREFIX), (NUMBER))
	153
	154	/* This is how to output an internal numbered label where
	155	PREFIX is the class of label and NUM is the number within the class. */
	156
	157	#undef ASM_OUTPUT_INTERNAL_LABEL
	158	#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
	159	fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
	160
	161	#endif /* NO_UNDERSCORES */