(ext_shift_insns, ext_shift_amounts): new arrays.

[thirdparty/gcc.git] / gcc / config / m68k / m68kemb.h

/* Definitions of target machine for GNU compiler.  "embedded" 68XXX.
   This is meant to be included after m68k.h.
   Copyright (C) 1994, 1995 Free Software Foundation, Inc.  */

#define PTRDIFF_TYPE "long int"
#define SIZE_TYPE "long unsigned int"

/* In order for bitfields to work on a 68000, or with -mnobitfield, we must
   define either PCC_BITFIELD_TYPE_MATTERS or STRUCTURE_SIZE_BOUNDARY.
   Defining STRUCTURE_SIZE_BOUNDARY results in structure packing problems,
   so we define PCC_BITFIELD_TYPE_MATTERS.  */
#define PCC_BITFIELD_TYPE_MATTERS 1

/* Undef PCC_STATIC_STRUCT_RETURN so that we get a re-entrant calling
   convention.  */
#undef PCC_STATIC_STRUCT_RETURN

/* Don't default to pcc-struct-return, so that we can return small structures
   and unions in registers, which is slightly more efficient.  */
#define DEFAULT_PCC_STRUCT_RETURN 0

/* Return floating point values in a fp register.  This make fp code a
   little bit faster.  It also makes -msoft-float code incompatible with
   -m68881 code, so people have to be careful not to mix the two.  */
#undef FUNCTION_VALUE
#define FUNCTION_VALUE(VALTYPE,FUNC) LIBCALL_VALUE (TYPE_MODE (VALTYPE))

#undef LIBCALL_VALUE
#define LIBCALL_VALUE(MODE)                                                \
 gen_rtx (REG, (MODE),                                                     \
          ((TARGET_68881                                                   \
            && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)) \
           ? 16 : 0))

#undef FUNCTION_VALUE_REGNO_P
#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (TARGET_68881 && (N) == 16))

#undef NEEDS_UNTYPED_CALL
#define NEEDS_UNTYPED_CALL 1

#undef CPP_PREDEFINES
#define CPP_PREDEFINES "-Dmc68000 -D__embedded__ -Asystem(embedded) \
  -Amachine(mc68000)"

#undef LINK_SPEC
#define LINK_SPEC "\
  %{midp: %{!Ttext*: -Ttext 0x00010000}} \
  %{mbcc: %{!Ttext*: -Ttext 0x00003000}} \
  %{mmvme135: %{!Ttext*: -Ttext 0x00005000}} \
  %{mmvme162: %{!Ttext*: -Ttext 0x00010000}}"

/* Use the target specific crt0 and libgloss/newlib libraries if desired */
#undef  STARTFILE_SPEC
#define STARTFILE_SPEC "\
  %{midp: idp-crt0.o} \
  %{mbcc: bcc-crt0.o} \
  %{mmvme135: mvme135-crt0.o} \
  %{mmvme162: mvme162-crt0.o}"

 /* We must always include -lc at least once.  If we use a board specific
    library, we must include -lc before and after the board specific
    library.  */
#undef  LIB_SPEC
#define LIB_SPEC "\
  -lc \
  %{mmvme135:-lmvme135 -lc} \
  %{mmvme162:-lmvme162 -lc} \
  %{midp:-lidp -lc} \
  %{mbcc:-lbcc -lc}"

#undef  SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES \
  { "mvme135", 0 }, \
  { "mvme162", 0 }, \
  { "bcc", 0}, \
  { "idp", 0 },