/* 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 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 /* 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 /* 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 ""