gcc/config/i386/sco.h

   1 /* Definitions for Intel 386 running SCO Unix System V.  */
   2
   3
   4 /* Mostly it's like AT&T Unix System V. */
   5
   6 #include "i386/sysv3.h"
   7
   8 /* By default, target has a 80387, uses IEEE compatible arithmetic,
   9    and returns float values in the 387, ie,
  10    (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387)
  11
  12    SCO's software emulation of a 387 fails to handle the `fucomp'
  13    opcode.  fucomp is only used when generating IEEE compliant code.
  14    So don't make TARGET_IEEE_FP default for SCO. */
  15
  16 #undef TARGET_DEFAULT
  17 #define TARGET_DEFAULT 0201
  18
  19 /* Let's guess that the SCO software FPU emulator can't handle
  20    80-bit XFmode insns, so don't generate them.  */
  21 #undef LONG_DOUBLE_TYPE_SIZE
  22 #define LONG_DOUBLE_TYPE_SIZE 64
  23
  24 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
  25
  26 #undef STARTFILE_SPEC
  27 #define STARTFILE_SPEC \
  28  "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
  29
  30 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  31
  32 /* Library spec, including SCO international language support. */
  33
  34 #undef LIB_SPEC
  35 #define LIB_SPEC \
  36  "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} %{scointl:libintl.a%s} -lc"
  37
  38 /* Specify predefined symbols in preprocessor.  */
  39
  40 #undef CPP_PREDEFINES
  41 #define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP -Asystem(unix) -Asystem(svr3) -Acpu(i386) -Amachine(i386)"
  42
  43 #undef CPP_SPEC
  44 #define CPP_SPEC "%{scointl:-DM_INTERNAT}"
  45
  46 /* This spec is used for telling cpp whether char is signed or not.  */
  47
  48 #undef SIGNED_CHAR_SPEC
  49 #if DEFAULT_SIGNED_CHAR
  50 #define SIGNED_CHAR_SPEC \
  51  "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
  52 #else
  53 #define SIGNED_CHAR_SPEC \
  54  "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
  55 #endif
  56
  57 /* Use atexit for static destructors, instead of defining
  58    our own exit function.  */
  59 #define HAVE_ATEXIT
  60
  61 /* Specify the size_t type.  */
  62 #define SIZE_TYPE "unsigned int"
  63
  64 #if 0 /* Not yet certain whether this is needed.  */
  65 /* If no 387, use the general regs to return floating values,
  66    since this system does not emulate the 80387.  */
  67
  68 #undef VALUE_REGNO
  69 #define VALUE_REGNO(MODE) \
  70   ((TARGET_80387
  71      && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode)
  72    ? FIRST_FLOAT_REG : 0)
  73
  74 #undef HARD_REGNO_MODE_OK
  75 #define HARD_REGNO_MODE_OK(REGNO, MODE)                                   \
  76   ((REGNO) < 2 ? 1                                                        \
  77    : (REGNO) < 4 ? 1                                                      \
  78    : FP_REGNO_P (REGNO) ? ((GET_MODE_CLASS (MODE) == MODE_FLOAT           \
  79                           || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
  80                          && TARGET_80387                                  \
  81                          && GET_MODE_UNIT_SIZE (MODE) <= 8)               \
  82    : (MODE) != QImode)
  83 #endif
  84
  85 /* caller has to pop the extra argument passed to functions that return
  86    structures. */
  87
  88 #undef RETURN_POPS_ARGS
  89 #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
  90   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0                   \
  91    : (TARGET_RTD                                                \
  92       && (TYPE_ARG_TYPES (FUNTYPE) == 0                         \
  93           || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) \
  94               == void_type_node))) ? (SIZE)                     \
  95    : 0)
  96 /* On other 386 systems, the last line looks like this:
  97    : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0)  */
  98
  99 /* Handle #pragma pack. */
 100 #define HANDLE_SYSV_PRAGMA