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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 "i386v.h"
7:
1.1.1.4 ! root 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:
1.1 root 19: /* Use crt1.o as a startup file and crtn.o as a closing file. */
20:
21: #undef STARTFILE_SPEC
1.1.1.4 ! root 22: #define STARTFILE_SPEC \
! 23: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s"
1.1 root 24:
1.1.1.2 root 25: #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
1.1 root 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:
1.1.1.2 root 38: #undef CPP_SPEC
1.1 root 39: #define CPP_SPEC "%{scointl:-DM_INTERNAT}"
40:
1.1.1.4 ! root 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:
1.1.1.2 root 52: /* Use atexit for static destructors, instead of defining
53: our own exit function. */
54: #define HAVE_ATEXIT
55:
1.1.1.3 root 56: /* Specify the size_t type. */
57: #define SIZE_TYPE "unsigned int"
58:
1.1 root 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
1.1.1.2 root 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) */
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