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Annotation of gcc/config/i386/sco.h, revision 1.1.1.1

1.1       root        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: /* 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: #undef VALUE_REGNO
                     64: #define VALUE_REGNO(MODE) \
                     65:   ((TARGET_80387 && ((MODE) == SFmode || (MODE) == DFmode))
                     66:    ? FIRST_FLOAT_REG : 0)
                     67: 
                     68: #undef HARD_REGNO_MODE_OK
                     69: #define HARD_REGNO_MODE_OK(REGNO, MODE)                                          \
                     70:   ((REGNO) < 2 ? 1                                                       \
                     71:    : (REGNO) < 4 ? 1                                                     \
                     72:    : FP_REGNO_P (REGNO) ? ((GET_MODE_CLASS (MODE) == MODE_FLOAT                  \
                     73:                           || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
                     74:                          && TARGET_80387                                 \
                     75:                          && GET_MODE_UNIT_SIZE (MODE) <= 8)              \
                     76:    : (MODE) != QImode)
                     77: #endif
                     78: 
                     79: /* caller has to pop the extra argument passed to functions that return
                     80:    structures. */
                     81: 
                     82: #undef RETURN_POPS_ARGS
                     83: #define RETURN_POPS_ARGS(FUNTYPE,SIZE)   \
                     84:   (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0                  \
                     85:    : (TARGET_RTD                                               \
                     86:       && (TYPE_ARG_TYPES (FUNTYPE) == 0                                \
                     87:          || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) \
                     88:              == void_type_node))) ? (SIZE)                     \
                     89:    : 0)
                     90: /* On other 386 systems, the last line looks like this:
                     91:    : (aggregate_value_p (FUNTYPE)) ? GET_MODE_SIZE (Pmode) : 0)  */

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