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Annotation of GNUtools/cc/config/i386/isc.h, revision 1.1.1.1

1.1       root        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

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