projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0d64f74c DE |
1 | /* Definitions of target machine for GNU compiler. "embedded" 68XXX. |
| 2 | This is meant to be included after m68k.h. | |
| c5c76735 | 3 | Copyright (C) 1994, 1995, 1998, 1999 Free Software Foundation, Inc. */ |
| 0d64f74c | 4 | |
| 91171315 DB |
5 | /* Override the SVR4 ABI for this target. */ |
| 6 | ||
| 0d64f74c DE |
7 | #define PTRDIFF_TYPE "long int" |
| 8 | #define SIZE_TYPE "long unsigned int" | |
| 9 | ||
| 10 | /* In order for bitfields to work on a 68000, or with -mnobitfield, we must | |
| 11 | define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY. | |
| 12 | Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems, | |
| 13 | so we define PCC_BITFIELD_TYPE_MATTERS. */ | |
| 14 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
| 15 | ||
| 16 | /* Undef PCC_STATIC_STRUCT_RETURN so that we get a re-entrant calling | |
| 17 | convention. */ | |
| 18 | #undef PCC_STATIC_STRUCT_RETURN | |
| 19 | ||
| 20 | /* Don't default to pcc-struct-return, so that we can return small structures | |
| 21 | and unions in registers, which is slightly more efficient. */ | |
| 22 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
| 23 | ||
| 24 | /* Return floating point values in a fp register. This make fp code a | |
| 25 | little bit faster. It also makes -msoft-float code incompatible with | |
| 26 | -m68881 code, so people have to be careful not to mix the two. */ | |
| 27 | #undef FUNCTION_VALUE | |
| 28 | #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) | |
| 29 | ||
| 30 | #undef LIBCALL_VALUE | |
| c5c76735 JL |
31 | #define LIBCALL_VALUE(MODE) \ |
| 32 | gen_rtx_REG ((MODE), \ | |
| 33 | ((TARGET_68881 \ | |
| 34 | && ((MODE) == SFmode || (MODE) == DFmode \ | |
| 35 | || (MODE) == XFmode)) \ | |
| 0d64f74c DE |
36 | ? 16 : 0)) |
| 37 | ||
| 38 | #undef FUNCTION_VALUE_REGNO_P | |
| 39 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16)) | |
| 40 | ||
| 41 | #undef NEEDS_UNTYPED_CALL | |
| 42 | #define NEEDS_UNTYPED_CALL 1 | |
| 9b3b5e8d | 43 | |
| a7fbe404 NB |
44 | /* Target OS builtins. */ |
| 45 | #define TARGET_OS_CPP_BUILTINS() \ | |
| 46 | do \ | |
| 47 | { \ | |
| 48 | builtin_define_std ("mc68000"); \ | |
| 49 | builtin_define ("__embedded__"); \ | |
| 50 | } \ | |
| 51 | while (0) | |
| 77c871e6 | 52 | |
| 0f220a3e | 53 | /* Override the default LIB_SPEC from gcc.c. We don't currently support |
| 2ebfd230 | 54 | profiling, or libg.a. */ |
| 77c871e6 | 55 | |
| f5c4bc60 | 56 | #undef LIB_SPEC |
| 0f220a3e | 57 | #define LIB_SPEC "-lc" |
| 77c871e6 | 58 | |
| 0f220a3e JW |
59 | /* Make this be null, since we want the crt0.o to come from the linker |
| 60 | script */ | |
| 77c871e6 | 61 | |
| f5c4bc60 | 62 | #undef STARTFILE_SPEC |
| 0f220a3e | 63 | #define STARTFILE_SPEC "" |