lynx.h

gcc-2.95.3 Linux下最常用的C编译器

/* Definitions for Motorola 680x0 running LynxOS.
   Copyright (C) 1993, 1994, 1995, 1996 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, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include <m68k/m68k.h>
#include <m68k/coff.h>

#undef CTORS_SECTION_ASM_OP
#undef DTORS_SECTION_ASM_OP
#undef ASM_OUTPUT_DESTRUCTOR
#undef SELECT_RTX_SECTION

#define BSS_SECTION_ASM_OP ".bss"

#define ASM_LONG ".long"

#include <lynx.h>

/* See m68k.h.  7 means 68020 with 68881.  */

#ifndef TARGET_DEFAULT
#define TARGET_DEFAULT (MASK_BITFIELD|MASK_68881|MASK_68020)
#endif

/* Names to predefine in the preprocessor for this target machine.  */

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dunix -Dmc68000 -DM68K -DLynx -DIBITS32 -Asystem(unix) -Asystem(lynx) -Acpu(m68k) -Amachine(m68k)"

/* Every structure or union's size must be a multiple of 2 bytes.  */

#define STRUCTURE_SIZE_BOUNDARY 16

/* Lynx uses d2 and d3 as scratch registers. */
#undef CALL_USED_REGISTERS
#define CALL_USED_REGISTERS \
 {1, 1, 1, 1, 0, 0, 0, 0,   \
  1, 1, 0, 0, 0, 0, 0, 1,   \
  1, 1, 0, 0, 0, 0, 0, 0 }

/* Return floating point values in a fp register.  This make fp code a
   little bit faster.  It also makes -msoft-float code incompatible with
   -m68881 code, so people have to be careful not to mix the two.  */
#undef FUNCTION_VALUE
#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))

#undef LIBCALL_VALUE
#define LIBCALL_VALUE(MODE)                                                \
 gen_rtx (REG, (MODE),                                                     \
          ((TARGET_68881                                                   \
            && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) \
           ? 16 : 0))

#undef FUNCTION_VALUE_REGNO_P
#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16))

#undef NEEDS_UNTYPED_CALL
#define NEEDS_UNTYPED_CALL 1