diff options
Diffstat (limited to 'gcc/config/m68k/m68kemb.h')
| -rw-r--r-- | gcc/config/m68k/m68kemb.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/config/m68k/m68kemb.h b/gcc/config/m68k/m68kemb.h new file mode 100644 index 00000000000..7b7521ab2ee --- /dev/null +++ b/gcc/config/m68k/m68kemb.h @@ -0,0 +1,39 @@ +/* Definitions of target machine for GNU compiler. "embedded" 68XXX. + This is meant to be included after m68k.h. + Copyright (C) 1994 Free Software Foundation, Inc. */ + +#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 + +/* Undef PCC_STATIC_STRUCT_RETURN so that we get a re-entrant calling + convention. */ +#undef PCC_STATIC_STRUCT_RETURN + +/* 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 + +/* 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 |