gcc/config/m68k/isi.h

   1 /* Definitions of target machine for GNU compiler.  ISI 68000/68020 version.
   2    Intended only for use with GAS, and not ISI's assembler, which is buggy
   3    Copyright (C) 1988, 1996 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "m68k/m68k.h"
  23
  24 /* See m68k.h.  7 means 68020 with 68881. */
  25 #ifndef TARGET_DEFAULT
  26 #define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020)
  27 #endif
  28
  29 #if TARGET_DEFAULT & MASK_68881
  30 /* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
  31    This will control the use of inline 68881 insns in certain macros.  */
  32
  33 #define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__}"
  34
  35 /* If the 68881 is used, link must load libmc.a before libc.a.  */
  36
  37 #define LIB_SPEC "%{!msoft-float:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
  38 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
  39
  40 #else
  41 /* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
  42    This will control the use of inline 68881 insns in certain macros.  */
  43
  44 #define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
  45
  46 /* If the 68881 is used, link must load libmc.a instead of libc.a */
  47
  48 #define LIB_SPEC "%{m68881:%{!p:%{!pg:-lmc}}%{p:-lmc_p}%{pg:-lmc_p}} \
  49 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} %{g:-lg}"
  50 #endif
  51
  52 /* Names to predefine in the preprocessor for this target machine.  */
  53
  54 #define CPP_PREDEFINES "-Dunix -Dmc68000 -Dis68k -Asystem(unix) -Asystem(bsd) -Acpu(m68k) -Amachine(m68k)"
  55
  56 /* This is BSD, so it wants DBX format.  */
  57
  58 #define DBX_DEBUGGING_INFO
  59
  60 /* Override parts of m68k.h to fit the ISI 68k machine.  */
  61
  62 #undef FUNCTION_VALUE
  63 #undef LIBCALL_VALUE
  64 #undef FUNCTION_VALUE_REGNO_P
  65 #undef NEEDS_UNTYPED_CALL
  66 #undef ASM_FILE_START
  67
  68 /* Every structure or union's size must be a multiple of 2 bytes.  */
  69
  70 #define STRUCTURE_SIZE_BOUNDARY 16
  71
  72 /* If TARGET_68881, return SF and DF values in f0 instead of d0.  */
  73
  74 #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
  75
  76 #define LIBCALL_VALUE(MODE) \
  77  gen_rtx (REG, (MODE), ((TARGET_68881 && ((MODE) == SFmode || (MODE) == DFmode)) ? 16 : 0))
  78
  79 /* 1 if N is a possible register number for a function value.
  80    D0 may be used, and F0 as well if -m68881 is specified.  */
  81
  82 #define FUNCTION_VALUE_REGNO_P(N) \
  83  ((N) == 0 || (TARGET_68881 && (N) == 16))
  84
  85 /* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
  86    more than one register.  */
  87
  88 #define NEEDS_UNTYPED_CALL 1
  89
  90 /* Also output something to cause the correct _doprnt to be loaded.  */
  91 #define ASM_FILE_START(FILE) fprintf (FILE, "#NO_APP\n%s\n", TARGET_68881 ? ".globl fltused" : "")