89 lines
3.3 KiB
C
89 lines
3.3 KiB
C
/* Definitions of target machine for GNU compiler. ISI 68000/68020 version.
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Intended only for use with GAS, and not ISI's assembler, which is buggy
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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 "m68k.h"
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/* Without STRUCTURE_SIZE_BOUNDARY, we can't ensure that structures are
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aligned such that we can correctly extract bitfields from them.
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Someone should check whether the usual compiler on this machine
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provides the equivalent behavior of STRUCTURE_SIZE_BOUNDARY. */
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/* Alternative solutions are (1) define PCC_BITFIELD_TYPE_MATTERS,
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if that fits what the usual compiler does,
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or disable the -m68000 and -mnobitfield options. */
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#error This doesn't define STRUCTURE_SIZE_BOUNDARY
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/* See m68k.h. 7 means 68020 with 68881. */
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#ifndef TARGET_DEFAULT
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#define TARGET_DEFAULT 7
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#endif
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#if TARGET_DEFAULT & 2
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/* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
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This will control the use of inline 68881 insns in certain macros. */
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#define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
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/* If the 68881 is used, link must load libmc.a instead of libc.a */
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#define LIB_SPEC "%{g:-lg} %{msoft-float:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}%{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} %{g:-lg}"
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#else
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/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
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This will control the use of inline 68881 insns in certain macros. */
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#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
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/* If the 68881 is used, link must load libmc.a instead of libc.a */
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#define LIB_SPEC "%{g:-lg} %{!m68881:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}%{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}}"
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#endif
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/* Names to predefine in the preprocessor for this target machine. */
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#define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k"
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/* This is BSD, so it wants DBX format. */
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#define DBX_DEBUGGING_INFO
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/* Override parts of m68k.h to fit the ISI 68k machine. */
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#undef FUNCTION_VALUE
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#undef LIBCALL_VALUE
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#undef FUNCTION_VALUE_REGNO_P
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#undef ASM_FILE_START
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/* If TARGET_68881, return SF and DF values in f0 instead of d0. */
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#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
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#define LIBCALL_VALUE(MODE) \
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gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
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/* 1 if N is a possible register number for a function value.
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D0 may be used, and F0 as well if -m68881 is specified. */
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#define FUNCTION_VALUE_REGNO_P(N) \
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((N) == 0 || (TARGET_68881 && (N) == 16))
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/* Also output something to cause the correct _doprnt to be loaded. */
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#define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")
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