entered into RCS

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@219 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/config/m68k/isi.h b/gcc/config/m68k/isi.h
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+/* Definitions of target machine for GNU compiler.  ISI 68000/68020 version.
+   Intended only for use with GAS, and not ISI's assembler, which is buggy
+   Copyright (C) 1988 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "m68k.h"
+
+/* Without STRUCTURE_SIZE_BOUNDARY, we can't ensure that structures are
+   aligned such that we can correctly extract bitfields from them.
+   Someone should check whether the usual compiler on this machine
+   provides the equivalent behavior of STRUCTURE_SIZE_BOUNDARY.  */
+/* Alternative solutions are (1) define PCC_BITFIELD_TYPE_MATTERS,
+   if that fits what the usual compiler does,
+   or disable the -m68000 and -mnobitfield options.  */
+#error This doesn't define STRUCTURE_SIZE_BOUNDARY
+
+/* See m68k.h.  7 means 68020 with 68881. */
+
+#ifndef TARGET_DEFAULT
+#define TARGET_DEFAULT 7
+#endif
+
+#if TARGET_DEFAULT & 2
+/* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
+   This will control the use of inline 68881 insns in certain macros.  */
+
+#define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
+
+/* If the 68881 is used, link must load libmc.a instead of libc.a */
+
+#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}"
+
+#else
+/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
+   This will control the use of inline 68881 insns in certain macros.  */
+
+#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
+
+/* If the 68881 is used, link must load libmc.a instead of libc.a */
+
+#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}}"
+#endif
+
+/* Names to predefine in the preprocessor for this target machine.  */
+
+#define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k"
+
+/* This is BSD, so it wants DBX format.  */
+
+#define DBX_DEBUGGING_INFO
+
+/* Override parts of m68k.h to fit the ISI 68k machine.  */
+
+#undef FUNCTION_VALUE
+#undef LIBCALL_VALUE
+#undef FUNCTION_VALUE_REGNO_P
+#undef ASM_FILE_START
+
+/* If TARGET_68881, return SF and DF values in f0 instead of d0.  */
+
+#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
+
+#define LIBCALL_VALUE(MODE) \
+ gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
+
+/* 1 if N is a possible register number for a function value.
+   D0 may be used, and F0 as well if -m68881 is specified.  */
+
+#define FUNCTION_VALUE_REGNO_P(N) \
+ ((N) == 0 || (TARGET_68881 && (N) == 16))
+
+/* Also output something to cause the correct _doprnt to be loaded.  */
+#define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")