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/svr3.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 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
  20
  21 #undef STARTFILE_SPEC
  22 #define STARTFILE_SPEC \
  23  "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
  24
  25 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  26
  27 /* Library spec, including SCO international language support. */
  28
  29 #undef LIB_SPEC
  30 #define LIB_SPEC \
  31  "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} %{scointl:libintl.a%s} -lc"
  32
  33 /* Specify predefined symbols in preprocessor.  */
  34
  35 #undef CPP_PREDEFINES
  36 #define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP"
  37
  38 #undef CPP_SPEC
  39 #define CPP_SPEC "%{scointl:-DM_INTERNAT}"
  40
  41 /* This spec is used for telling cpp whether char is signed or not.  */
  42
  43 #undef SIGNED_CHAR_SPEC
  44 #if DEFAULT_SIGNED_CHAR
  45 #define SIGNED_CHAR_SPEC \
  46  "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
  47 #else
  48 #define SIGNED_CHAR_SPEC \
  49  "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}"
  50 #endif
  51
  52 /* Use atexit for static destructors, instead of defining
  53    our own exit function.  */
  54 #define HAVE_ATEXIT
  55
  56 /* Specify the size_t type.  */
  57 #define SIZE_TYPE "unsigned int"
  58
  59 #if 0 /* Not yet certain whether this is needed.  */
  60 /* If no 387, use the general regs to return floating values,
  61    since this system does not emulate the 80387.  */
  62
  63 #define VALUE_REGNO(MODE) \
  64   ((TARGET_80387 && ((MODE) == SFmode || (MODE) == DFmode))
  65    ? FIRST_FLOAT_REG : 0)
  66
  67 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
  68   ((REGNO) < 2 ? 1                                                      \
  69    : (REGNO) < 4 ? 1                                                    \
  70    : (REGNO) >= 8 ? ((GET_MODE_CLASS (MODE) == MODE_FLOAT               \
  71                       || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT)   \
  72                      && TARGET_80387                                    \
  73                      && GET_MODE_UNIT_SIZE (MODE) <= 8)                 \
  74    : (MODE) != QImode)
  75 #endif
  76
  77 /* caller has to pop the extra argument passed to functions that return
  78    structures. */
  79
  80 #undef RETURN_POPS_ARGS
  81 #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
  82   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0                   \
  83    : (TARGET_RTD                                                \
  84       && (TYPE_ARG_TYPES (FUNTYPE) == 0                         \
  85           || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) \
  86               == void_type_node))) ? (SIZE)                     \
  87    : 0)
  88 /* On other 386 systems, the last line looks like this:
  89    : (aggregate_value_p (FUNTYPE)) ? GET_MODE_SIZE (Pmode) : 0)  */