156 lines
4.9 KiB
C
156 lines
4.9 KiB
C
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/* Definitions for Intel 386 running system V with gnu tools
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Copyright (C) 1988, 1993, 1994 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Note that i386/seq-gas.h is a GAS configuration that does not use this
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file. */
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#include "i386/i386.h"
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#ifndef YES_UNDERSCORES
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/* Define this now, because i386/bsd.h tests it. */
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#define NO_UNDERSCORES
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#endif
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/* Use the bsd assembler syntax. */
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/* we need to do this because gas is really a bsd style assembler,
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* and so doesn't work well this these att-isms:
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*
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* ASM_OUTPUT_SKIP is .set .,.+N, which isn't implemented in gas
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* ASM_OUTPUT_LOCAL is done with .set .,.+N, but that can't be
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* used to define bss static space
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*
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* Next is the question of whether to uses underscores. RMS didn't
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* like this idea at first, but since it is now obvious that we
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* need this separate tm file for use with gas, at least to get
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* dbx debugging info, I think we should also switch to underscores.
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* We can keep i386v for real att style output, and the few
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* people who want both form will have to compile twice.
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*/
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#include "i386/bsd.h"
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/* these come from i386/bsd.h, but are specific to sequent */
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#undef DBX_NO_XREFS
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#undef DBX_CONTIN_LENGTH
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/* Ask for COFF symbols. */
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#define SDB_DEBUGGING_INFO
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/* Specify predefined symbols in preprocessor. */
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#define CPP_PREDEFINES "-Dunix -Di386 -Asystem(unix) -Acpu(i386) -Amachine(i386)"
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#define CPP_SPEC "%{posix:-D_POSIX_SOURCE}"
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/* Allow #sccs in preprocessor. */
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#define SCCS_DIRECTIVE
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/* Output #ident as a .ident. */
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#define ASM_OUTPUT_IDENT(FILE, NAME) fprintf (FILE, "\t.ident \"%s\"\n", NAME);
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/* Implicit library calls should use memcpy, not bcopy, etc. */
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#define TARGET_MEM_FUNCTIONS
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#if 0 /* People say gas uses the log as the arg to .align. */
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/* When using gas, .align N aligns to an N-byte boundary. */
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#undef ASM_OUTPUT_ALIGN
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
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if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
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#endif
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/* Align labels, etc. at 4-byte boundaries.
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For the 486, align to 16-byte boundary for sake of cache. */
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#undef ASM_OUTPUT_ALIGN_CODE
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#define ASM_OUTPUT_ALIGN_CODE(FILE) \
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fprintf ((FILE), "\t.align %d,0x90\n", i386_align_jumps)
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/* Align start of loop at 4-byte boundary. */
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#undef ASM_OUTPUT_LOOP_ALIGN
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#define ASM_OUTPUT_LOOP_ALIGN(FILE) \
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fprintf ((FILE), "\t.align %d,0x90\n", i386_align_loops)
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/* A C statement or statements which output an assembler instruction
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opcode to the stdio stream STREAM. The macro-operand PTR is a
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variable of type `char *' which points to the opcode name in its
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"internal" form--the form that is written in the machine description.
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GAS version 1.38.1 doesn't understand the `repz' opcode mnemonic.
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So use `repe' instead. */
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#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
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{ \
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if ((PTR)[0] == 'r' \
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&& (PTR)[1] == 'e' \
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&& (PTR)[2] == 'p') \
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{ \
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if ((PTR)[3] == 'z') \
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{ \
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fprintf (STREAM, "repe"); \
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(PTR) += 4; \
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} \
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else if ((PTR)[3] == 'n' && (PTR)[4] == 'z') \
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{ \
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fprintf (STREAM, "repne"); \
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(PTR) += 5; \
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} \
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} \
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}
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/* Define macro used to output shift-double opcodes when the shift
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count is in %cl. Some assemblers require %cl as an argument;
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some don't.
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GAS requires the %cl argument, so override i386/unix.h. */
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#undef AS3_SHIFT_DOUBLE
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#define AS3_SHIFT_DOUBLE(a,b,c,d) AS3 (a,b,c,d)
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/* Print opcodes the way that GAS expects them. */
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#define GAS_MNEMONICS 1
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#ifdef NO_UNDERSCORES /* If user-symbols don't have underscores,
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then it must take more than `L' to identify
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a label that should be ignored. */
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/* This is how to store into the string BUF
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the symbol_ref name of an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class.
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This is suitable for output with `assemble_name'. */
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#undef ASM_GENERATE_INTERNAL_LABEL
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#define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER) \
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sprintf ((BUF), ".%s%d", (PREFIX), (NUMBER))
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/* This is how to output an internal numbered label where
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PREFIX is the class of label and NUM is the number within the class. */
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#undef ASM_OUTPUT_INTERNAL_LABEL
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#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \
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fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
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#endif /* NO_UNDERSCORES */
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