117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/* Definitions for Sequent Intel 386.
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Copyright (C) 1988 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "i386.h"
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/* Use the BSD assembler syntax. */
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#include "bsd386.h"
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/* By default, target has a 80387. */
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#define TARGET_DEFAULT 1
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/* Specify predefined symbols in preprocessor. */
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#define CPP_PREDEFINES "-Dunix -Di386 -Dsequent"
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/* Pass -Z and -ZO options to the linker. */
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#define LINK_SPEC "%{Z*}"
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/* Link with libg.a when debugging, for dbx's sake. */
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#define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
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/* We don't want to output SDB debugging information. */
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#undef SDB_DEBUGGING_INFO
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/* We want to output DBX debugging information. */
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#define DBX_DEBUGGING_INFO
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/* gcc order is ax, dx, cx, bx, si, di, bp, sp, st, st.
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* dbx order is ax, dx, cx, st(0), st(1), bx, si, di, st(2), st(3),
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* st(4), st(5), st(6), st(7), sp, bp */
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/* ??? The right thing would be to change the ordering of the
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registers to correspond to the conventions of this system,
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and get rid of DBX_REGISTER_NUMBER. */
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#undef DBX_REGISTER_NUMBER
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#define DBX_REGISTER_NUMBER(n) \
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((n) < 3 ? (n) : (n) < 6 ? (n) + 2 \
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: (n) == 6 ? 15 : (n) == 7 ? 14 : 3)
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/* Prevent anything from being allocated in the register pair cx/bx,
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since that would confuse GDB. */
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#undef HARD_REGNO_MODE_OK
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#define HARD_REGNO_MODE_OK(REGNO, MODE) \
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(((REGNO) < 2 ? 1 \
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: (REGNO) < 4 ? 1 \
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: (REGNO) >= 8 ? (GET_MODE_CLASS (MODE) == MODE_FLOAT \
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|| GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
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: (MODE) != QImode) \
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&& ! (REGNO == 2 && GET_MODE_UNIT_SIZE (MODE) > 4))
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/* Floating-point return values come in the FP register. */
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#define VALUE_REGNO(MODE) \
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(((MODE)==SFmode || (MODE)==DFmode) ? FIRST_FLOAT_REG : 0)
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/* 1 if N is a possible register number for a function value. */
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#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG)
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/* Output assembler code to FILE to increment profiler label # LABELNO
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for profiling a function entry. */
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#undef FUNCTION_PROFILER
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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fprintf (FILE, "\tmovl $LP%d,%%eax\n\tcall mcount\n", (LABELNO));
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/* Assembler pseudo-op for shared data segment. */
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#define SHARED_SECTION_ASM_OP ".shdata"
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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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The Sequent assembler (identified as "Balance 8000 Assembler
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07/17/85 3.90" by "as -v") does not understand the `movs[bwl]' string
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move mnemonics - it uses `smov[bwl]' instead. Change "movs" into
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"smov", carefully avoiding the sign-extend opcodes. */
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#define ASM_OUTPUT_OPCODE(STREAM, PTR) \
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{ \
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if ((PTR)[0] == 'm' \
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&& (PTR)[1] == 'o' \
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&& (PTR)[2] == 'v' \
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&& (PTR)[3] == 's' \
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&& ((PTR)[4] == 'b' || (PTR)[4] == 'w' || (PTR)[4] == 'l') \
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&& ((PTR)[5] == ' ' || (PTR)[5] == '\t'|| (PTR)[5] == '\0')) \
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{ \
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fprintf (STREAM, "smov"); \
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(PTR) += 4; \
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} \
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}
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