| /* Definitions of target machine for GNU compiler. "embedded" 68XXX. |
| This is meant to be included after m68k.h. |
| Copyright (C) 1994, 1995 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 |
| |
| #undef CPP_PREDEFINES |
| #define CPP_PREDEFINES "-Dmc68000 -D__embedded__ -Asystem(embedded) \ |
| -Amachine(mc68000)" |
| |
| /* Override the default LIB_SPEC from gcc.c. We don't currently support |
| profiling, or libg.a |
| |
| #define LIB_SPEC "-lc" |
| |
| /* Make this be null, since we want the crt0.o to come from the linker |
| script */ |
| |
| #define STARTFILE_SPEC "" |
