gcc/config/i386/isc.h

   1 /* Assembler-independent definitions for an Intel 386 running
   2    Interactive Unix System V. Specifically, this is for recent versions
   3    that support POSIX.  */
   4
   5 /* Use crt1.o, not crt0.o, as a startup file, and crtn.o as a closing file. */
   6 #undef STARTFILE_SPEC
   7 #define STARTFILE_SPEC \
   8   "%{!shlib:%{posix:%{pg:mcrtp1.o%s}%{!pg:%{p:mcrtp1.o%s}%{!p:crtp1.o%s}}}\
   9    %{!posix:%{pg:mcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}\
  10    %{p:-L/lib/libp} %{pg:-L/lib/libp}}}\
  11    %{shlib:%{posix:crtp1.o%s}%{!posix:crt1.o%s}} crtbegin.o%s"
  12
  13 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  14
  15 /* Library spec */
  16 #undef LIB_SPEC
  17 #define LIB_SPEC "%{shlib:-lc_s} %{posix:-lcposix} -lc -lg"
  18
  19 /* ISC 2.2 uses `char' for `wchar_t'.  */
  20 #undef WCHAR_TYPE
  21 #define WCHAR_TYPE "char"
  22
  23 #undef WCHAR_TYPE_SIZE
  24 #define WCHAR_TYPE_SIZE BITS_PER_UNIT
  25
  26 #if 0
  27 /* This is apparently not true: ISC versions up to 3.0, at least, use
  28    the standard calling sequence in which the called function pops the
  29    extra arg.  */
  30 /* caller has to pop the extra argument passed to functions that return
  31    structures. */
  32
  33 #undef RETURN_POPS_ARGS
  34 #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
  35   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0                   \
  36    : (TARGET_RTD                                                \
  37       && (TYPE_ARG_TYPES (FUNTYPE) == 0                         \
  38           || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) \
  39               == void_type_node))) ? (SIZE)                     \
  40    : 0)
  41 /* On other 386 systems, the last line looks like this:
  42    : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0)  */
  43 #endif
  44
  45 /* Handle #pragma pack and #pragma weak.  */
  46 #define HANDLE_SYSV_PRAGMA
  47
  48 /* By default, target has a 80387, uses IEEE compatible arithmetic,
  49    and returns float values in the 387, ie,
  50    (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387)
  51
  52    ISC's software emulation of a 387 fails to handle the `fucomp'
  53    opcode.  fucomp is only used when generating IEEE compliant code.
  54    So don't make TARGET_IEEE_FP default for ISC. */
  55
  56 #undef TARGET_DEFAULT
  57 #define TARGET_DEFAULT 0201
  58
  59 /* The ISC 2.0.2 software FPU emulator apparently can't handle
  60    80-bit XFmode insns, so don't generate them.  */
  61 #undef LONG_DOUBLE_TYPE_SIZE
  62 #define LONG_DOUBLE_TYPE_SIZE 64
  63
  64 /* The ISC assembler does not like a .file directive with a name
  65    longer than 14 characters.  Truncating it will not permit
  66    debugging to work properly, but at least we won't get an error
  67    message.  */
  68
  69 #undef ASM_FILE_START
  70 #define ASM_FILE_START(FILE)                     \
  71   do {                                           \
  72    char c;                                       \
  73    int max = 0;                                  \
  74    char *string = dump_base_name;                \
  75                                                  \
  76     fputs ("\t.file\t\"", FILE);                                 \
  77                                                  \
  78     while ((c = *string++) != 0 && max++ < 14) { \
  79        if (c == '\"' || c == '\\')               \
  80          putc ('\\', FILE);                      \
  81        putc (c, FILE);                           \
  82     }                                            \
  83     fputs ("\"\n", FILE);                        \
  84   } while (0)