gcc/config/m68k/lynx.h

   1 /* Definitions for Motorola 680x0 running LynxOS.
   2    Copyright (C) 1993, 94, 95, 96, 98, 1999 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 #include <m68k/coff.h>
  23
  24 #undef CTORS_SECTION_ASM_OP
  25 #undef DTORS_SECTION_ASM_OP
  26 #undef ASM_OUTPUT_DESTRUCTOR
  27 #undef SELECT_RTX_SECTION
  28
  29 #define BSS_SECTION_ASM_OP ".bss"
  30
  31 #define ASM_LONG ".long"
  32
  33 #include <lynx.h>
  34
  35 /* See m68k.h.  7 means 68020 with 68881.  */
  36
  37 #ifndef TARGET_DEFAULT
  38 #define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020)
  39 #endif
  40
  41 /* Names to predefine in the preprocessor for this target machine.  */
  42
  43 #undef CPP_PREDEFINES
  44 #define CPP_PREDEFINES "-Dunix -Dmc68000 -DM68K -DLynx -DIBITS32 -Asystem(unix) -Asystem(lynx) -Acpu(m68k) -Amachine(m68k)"
  45
  46 /* Every structure or union's size must be a multiple of 2 bytes.  */
  47
  48 #define STRUCTURE_SIZE_BOUNDARY 16
  49
  50 /* Lynx uses d2 and d3 as scratch registers. */
  51 #undef CALL_USED_REGISTERS
  52 #define CALL_USED_REGISTERS \
  53  {1, 1, 1, 1, 0, 0, 0, 0,   \
  54   1, 1, 0, 0, 0, 0, 0, 1,   \
  55   1, 1, 0, 0, 0, 0, 0, 0 }
  56
  57 /* Return floating point values in a fp register.  This make fp code a
  58    little bit faster.  It also makes -msoft-float code incompatible with
  59    -m68881 code, so people have to be careful not to mix the two.  */
  60 #undef FUNCTION_VALUE
  61 #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
  62
  63 #undef LIBCALL_VALUE
  64 #define LIBCALL_VALUE(MODE)                                                \
  65  gen_rtx_REG ((MODE),                                           \
  66               ((TARGET_68881                                    \
  67                 && ((MODE) == SFmode || (MODE) == DFmode        \
  68                     || (MODE) == XFmode))                       \
  69            ? 16 : 0))
  70
  71 #undef FUNCTION_VALUE_REGNO_P
  72 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16))
  73
  74 #undef NEEDS_UNTYPED_CALL
  75 #define NEEDS_UNTYPED_CALL 1