Subversion Repositories openrisc_2011-10-31

/* Definitions of target machine for GNU compiler.  "embedded" 68XXX.

   This is meant to be included after m68k.h.

   Copyright (C) 1994, 1995, 1998, 1999, 2004, 2006

   Free Software Foundation, Inc.  */

/* Override the SVR4 ABI for this target.  */

#define PTRDIFF_TYPE "long int"

#define SIZE_TYPE "long unsigned int"

/* In order for bitfields to work on a 68000, or with -mnobitfield, we must

   define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY.

   Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems,

   so we define PCC_BITFIELD_TYPE_MATTERS.  */

#define PCC_BITFIELD_TYPE_MATTERS 1

/* Don't default to pcc-struct-return, so that we can return small structures

   and unions in registers, which is slightly more efficient.  */

#define DEFAULT_PCC_STRUCT_RETURN 0

#undef FUNCTION_VALUE

#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))

#undef LIBCALL_VALUE

#define LIBCALL_VALUE(MODE)                                     \

  m68k_libcall_value (MODE)

#undef FUNCTION_VALUE_REGNO_P

#define FUNCTION_VALUE_REGNO_P(N)                       \

  ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG))

#undef NEEDS_UNTYPED_CALL

#define NEEDS_UNTYPED_CALL 1

/* Target OS builtins.  */

#define TARGET_OS_CPP_BUILTINS()                \

  do                                            \

    {                                           \

      builtin_define ("__embedded__");          \

    }                                           \

  while (0)

/* Override the default LIB_SPEC from gcc.c.  We don't currently support

   profiling, or libg.a.  */

#undef  LIB_SPEC

#define LIB_SPEC "-lc"

/* Make this be null, since we want the crt0.o to come from the linker

   script */

#undef  STARTFILE_SPEC

#define STARTFILE_SPEC ""