|
0
|
1 /* Definitions of target machine for GNU compiler. "embedded" 68XXX.
|
|
|
2 This is meant to be included after m68k.h.
|
|
131
|
3 Copyright (C) 1994-2018 Free Software Foundation, Inc. */
|
|
0
|
4
|
|
|
5 /* Override the SVR4 ABI for this target. */
|
|
|
6
|
|
|
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 /* Don't default to pcc-struct-return, so that we can return small structures
|
|
|
17 and unions in registers, which is slightly more efficient. */
|
|
|
18 #define DEFAULT_PCC_STRUCT_RETURN 0
|
|
|
19
|
|
|
20 #undef FUNCTION_VALUE
|
|
|
21 #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
|
|
|
22
|
|
|
23 #undef LIBCALL_VALUE
|
|
|
24 #define LIBCALL_VALUE(MODE) \
|
|
|
25 m68k_libcall_value (MODE)
|
|
|
26
|
|
|
27 #undef FUNCTION_VALUE_REGNO_P
|
|
|
28 #define FUNCTION_VALUE_REGNO_P(N) \
|
|
|
29 ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG))
|
|
|
30
|
|
|
31 #undef NEEDS_UNTYPED_CALL
|
|
|
32 #define NEEDS_UNTYPED_CALL 1
|
|
|
33
|
|
|
34 /* Target OS builtins. */
|
|
|
35 #define TARGET_OS_CPP_BUILTINS() \
|
|
|
36 do \
|
|
|
37 { \
|
|
|
38 builtin_define ("__embedded__"); \
|
|
|
39 } \
|
|
|
40 while (0)
|
|
|
41
|
|
|
42 /* Override the default LIB_SPEC from gcc.c. We don't currently support
|
|
|
43 profiling, or libg.a. */
|
|
|
44
|
|
|
45 #undef LIB_SPEC
|
|
|
46 #define LIB_SPEC "-lc"
|
|
|
47
|
|
|
48 /* Make this be null, since we want the crt0.o to come from the linker
|
|
|
49 script */
|
|
|
50
|
|
|
51 #undef STARTFILE_SPEC
|
|
|
52 #define STARTFILE_SPEC ""
|
