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0d64f74c DE |
1 | /* Definitions of target machine for GNU compiler. "embedded" 68XXX. |
2 | This is meant to be included after m68k.h. | |
9b3b5e8d | 3 | Copyright (C) 1994, 1995 Free Software Foundation, Inc. */ |
0d64f74c DE |
4 | |
5 | #define PTRDIFF_TYPE "long int" | |
6 | #define SIZE_TYPE "long unsigned int" | |
7 | ||
8 | /* In order for bitfields to work on a 68000, or with -mnobitfield, we must | |
9 | define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY. | |
10 | Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems, | |
11 | so we define PCC_BITFIELD_TYPE_MATTERS. */ | |
12 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
13 | ||
14 | /* Undef PCC_STATIC_STRUCT_RETURN so that we get a re-entrant calling | |
15 | convention. */ | |
16 | #undef PCC_STATIC_STRUCT_RETURN | |
17 | ||
18 | /* Don't default to pcc-struct-return, so that we can return small structures | |
19 | and unions in registers, which is slightly more efficient. */ | |
20 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
21 | ||
22 | /* Return floating point values in a fp register. This make fp code a | |
23 | little bit faster. It also makes -msoft-float code incompatible with | |
24 | -m68881 code, so people have to be careful not to mix the two. */ | |
25 | #undef FUNCTION_VALUE | |
26 | #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE)) | |
27 | ||
28 | #undef LIBCALL_VALUE | |
29 | #define LIBCALL_VALUE(MODE) \ | |
30 | gen_rtx (REG, (MODE), \ | |
31 | ((TARGET_68881 \ | |
32 | && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) \ | |
33 | ? 16 : 0)) | |
34 | ||
35 | #undef FUNCTION_VALUE_REGNO_P | |
36 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16)) | |
37 | ||
38 | #undef NEEDS_UNTYPED_CALL | |
39 | #define NEEDS_UNTYPED_CALL 1 | |
9b3b5e8d RK |
40 | |
41 | /* crt0.o should be specified in the linker script. */ | |
42 | #undef STARTFILE_SPEC | |
43 | #define STARTFILE_SPEC "" |