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comparison gcc/config/m68k/m68kemb.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 04ced10e8804
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-1:000000000000 0:a06113de4d67
1 /* Definitions of target machine for GNU compiler. "embedded" 68XXX.
2 This is meant to be included after m68k.h.
3 Copyright (C) 1994, 1995, 1998, 1999, 2004, 2006
4 Free Software Foundation, Inc. */
5
6 /* Override the SVR4 ABI for this target. */
7
8 #define PTRDIFF_TYPE "long int"
9 #define SIZE_TYPE "long unsigned int"
10
11 /* In order for bitfields to work on a 68000, or with -mnobitfield, we must
12 define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY.
13 Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems,
14 so we define PCC_BITFIELD_TYPE_MATTERS. */
15 #define PCC_BITFIELD_TYPE_MATTERS 1
16
17 /* Don't default to pcc-struct-return, so that we can return small structures
18 and unions in registers, which is slightly more efficient. */
19 #define DEFAULT_PCC_STRUCT_RETURN 0
20
21 #undef FUNCTION_VALUE
22 #define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
23
24 #undef LIBCALL_VALUE
25 #define LIBCALL_VALUE(MODE) \
26 m68k_libcall_value (MODE)
27
28 #undef FUNCTION_VALUE_REGNO_P
29 #define FUNCTION_VALUE_REGNO_P(N) \
30 ((N) == D0_REG || (TARGET_68881 && (N) == FP0_REG))
31
32 #undef NEEDS_UNTYPED_CALL
33 #define NEEDS_UNTYPED_CALL 1
34
35 /* Target OS builtins. */
36 #define TARGET_OS_CPP_BUILTINS() \
37 do \
38 { \
39 builtin_define ("__embedded__"); \
40 } \
41 while (0)
42
43 /* Override the default LIB_SPEC from gcc.c. We don't currently support
44 profiling, or libg.a. */
45
46 #undef LIB_SPEC
47 #define LIB_SPEC "-lc"
48
49 /* Make this be null, since we want the crt0.o to come from the linker
50 script */
51
52 #undef STARTFILE_SPEC
53 #define STARTFILE_SPEC ""