40 lines
1.6 KiB
C
40 lines
1.6 KiB
C
/* Definitions of target machine for GNU compiler. "embedded" 68XXX.
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This is meant to be included after m68k.h.
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Copyright (C) 1994 Free Software Foundation, Inc. */
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#define PTRDIFF_TYPE "long int"
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#define SIZE_TYPE "long unsigned int"
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/* In order for bitfields to work on a 68000, or with -mnobitfield, we must
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define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY.
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Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems,
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so we define PCC_BITFIELD_TYPE_MATTERS. */
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#define PCC_BITFIELD_TYPE_MATTERS 1
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/* Undef PCC_STATIC_STRUCT_RETURN so that we get a re-entrant calling
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convention. */
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#undef PCC_STATIC_STRUCT_RETURN
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/* Don't default to pcc-struct-return, so that we can return small structures
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and unions in registers, which is slightly more efficient. */
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#define DEFAULT_PCC_STRUCT_RETURN 0
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/* Return floating point values in a fp register. This make fp code a
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little bit faster. It also makes -msoft-float code incompatible with
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-m68881 code, so people have to be careful not to mix the two. */
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#undef FUNCTION_VALUE
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#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))
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#undef LIBCALL_VALUE
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#define LIBCALL_VALUE(MODE) \
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gen_rtx (REG, (MODE), \
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((TARGET_68881 \
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&& ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) \
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? 16 : 0))
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#undef FUNCTION_VALUE_REGNO_P
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#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16))
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#undef NEEDS_UNTYPED_CALL
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#define NEEDS_UNTYPED_CALL 1
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