gcc/config/m68k/3b1g.h

   1 /* Definitions of target machine for GNU compiler, for a 3b1 using GAS.
   2    Copyright (C) 1987, 1988 Free Software Foundation, Inc.
   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
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "m68k/m68k.h"
  22
  23 /* See m68k.h.  0 means 68000 with no 68881.  */
  24 #define TARGET_DEFAULT 0
  25
  26 /* Don't try using XFmode.  */
  27 #undef LONG_DOUBLE_TYPE_SIZE
  28 #define LONG_DOUBLE_TYPE_SIZE 64
  29
  30 /* Define __HAVE_68881 in preprocessor only if -m68881 is specified.
  31    This will control the use of inline 68881 insns in certain macros.
  32    Also inform the program which CPU this is for.  */
  33 #define CPP_SPEC "%{m68881:-D__HAVE_68881__} \
  34 %{!ansi:%{m68020:-Dmc68020}%{mc68020:-Dmc68020}%{!mc68020:%{!m68020:-Dmc68010}}}"
  35
  36 /* -m68020 requires special flags to the assembler.  */
  37 #define ASM_SPEC \
  38  "%{m68020:-mc68020}%{mc68020:-mc68020}%{!mc68020:%{!m68020:-mc68010}}"
  39
  40 /* Names to predefine in the preprocessor for this target machine.  */
  41 #define CPP_PREDEFINES "-Dmc68000 -Dmc68k -Dunix -Dunixpc -Asystem=unix  -Asystem=svr3 -Acpu=m68k -Amachine=m68k"
  42
  43 /* This is (not really) BSD, so (but) it wants DBX format.  */
  44 #define DBX_DEBUGGING_INFO 1
  45
  46 /* Specify how to pad function arguments.
  47    Value should be `upward', `downward' or `none'.
  48    Same as the default, except no padding for large or variable-size args.  */
  49 #define FUNCTION_ARG_PADDING(MODE, TYPE)                                \
  50   (((MODE) == BLKmode                                                   \
  51     ? ((TYPE) && TREE_CODE (TYPE_SIZE (TYPE))   == INTEGER_CST          \
  52        && int_size_in_bytes (TYPE) < PARM_BOUNDARY / BITS_PER_UNIT)     \
  53     : GET_MODE_BITSIZE (MODE) < PARM_BOUNDARY)                          \
  54    ? downward : none)
  55
  56 /* Every structure or union's size must be a multiple of 2 bytes.  */
  57 #define STRUCTURE_SIZE_BOUNDARY 16
  58
  59 /* Generate calls to memcpy, memcmp and memset.  */
  60 #define TARGET_MEM_FUNCTIONS
  61