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1.1.1.4 ! root 1: /* Definitions for Intel 386 running SCO Unix System V. ! 2: Copyright (C) 1988, 1992, 1994, 1995 Free Software Foundation, Inc. 1.1 root 3: 1.1.1.4 ! root 4: This file is part of GNU CC. ! 5: ! 6: GNU CC is free software; you can redistribute it and/or modify ! 7: it under the terms of the GNU General Public License as published by ! 8: the Free Software Foundation; either version 2, or (at your option) ! 9: any later version. ! 10: ! 11: GNU CC is distributed in the hope that it will be useful, ! 12: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 14: GNU General Public License for more details. ! 15: ! 16: You should have received a copy of the GNU General Public License ! 17: along with GNU CC; see the file COPYING. If not, write to ! 18: the Free Software Foundation, 59 Temple Place - Suite 330, ! 19: Boston, MA 02111-1307, USA. */ 1.1 root 20: 21: /* Mostly it's like AT&T Unix System V. */ 22: 23: #include "i386/sysv3.h" 24: 25: /* By default, target has a 80387, uses IEEE compatible arithmetic, 26: and returns float values in the 387, ie, 27: (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387) 28: 29: SCO's software emulation of a 387 fails to handle the `fucomp' 30: opcode. fucomp is only used when generating IEEE compliant code. 31: So don't make TARGET_IEEE_FP default for SCO. */ 32: 33: #undef TARGET_DEFAULT 34: #define TARGET_DEFAULT 0201 35: 1.1.1.2 root 36: /* Let's guess that the SCO software FPU emulator can't handle 37: 80-bit XFmode insns, so don't generate them. */ 38: #undef LONG_DOUBLE_TYPE_SIZE 39: #define LONG_DOUBLE_TYPE_SIZE 64 40: 1.1 root 41: /* Use crt1.o as a startup file and crtn.o as a closing file. */ 42: 43: #undef STARTFILE_SPEC 44: #define STARTFILE_SPEC \ 45: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} crtbegin.o%s" 46: 47: #define ENDFILE_SPEC "crtend.o%s crtn.o%s" 48: 49: /* Library spec, including SCO international language support. */ 50: 51: #undef LIB_SPEC 52: #define LIB_SPEC \ 53: "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} %{scointl:libintl.a%s} -lc" 54: 55: /* Specify predefined symbols in preprocessor. */ 56: 57: #undef CPP_PREDEFINES 1.1.1.2 root 58: #define CPP_PREDEFINES "-Dunix -Di386 -DM_UNIX -DM_I386 -DM_COFF -DM_WORDSWAP -Asystem(unix) -Asystem(svr3) -Acpu(i386) -Amachine(i386)" 1.1 root 59: 60: #undef CPP_SPEC 61: #define CPP_SPEC "%{scointl:-DM_INTERNAT}" 62: 63: /* This spec is used for telling cpp whether char is signed or not. */ 64: 65: #undef SIGNED_CHAR_SPEC 66: #if DEFAULT_SIGNED_CHAR 67: #define SIGNED_CHAR_SPEC \ 68: "%{funsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}" 69: #else 70: #define SIGNED_CHAR_SPEC \ 71: "%{!fsigned-char:-D__CHAR_UNSIGNED__ -D_CHAR_UNSIGNED}" 72: #endif 73: 74: /* Use atexit for static destructors, instead of defining 75: our own exit function. */ 76: #define HAVE_ATEXIT 77: 78: /* Specify the size_t type. */ 79: #define SIZE_TYPE "unsigned int" 80: 81: #if 0 /* Not yet certain whether this is needed. */ 82: /* If no 387, use the general regs to return floating values, 83: since this system does not emulate the 80387. */ 84: 85: #undef VALUE_REGNO 86: #define VALUE_REGNO(MODE) \ 1.1.1.2 root 87: ((TARGET_80387 88: && ((MODE) == SFmode || (MODE) == DFmode || (MODE) == XFmode) 1.1 root 89: ? FIRST_FLOAT_REG : 0) 90: 91: #undef HARD_REGNO_MODE_OK 92: #define HARD_REGNO_MODE_OK(REGNO, MODE) \ 93: ((REGNO) < 2 ? 1 \ 94: : (REGNO) < 4 ? 1 \ 95: : FP_REGNO_P (REGNO) ? ((GET_MODE_CLASS (MODE) == MODE_FLOAT \ 96: || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \ 97: && TARGET_80387 \ 98: && GET_MODE_UNIT_SIZE (MODE) <= 8) \ 99: : (MODE) != QImode) 100: #endif 101: 102: /* caller has to pop the extra argument passed to functions that return 103: structures. */ 104: 105: #undef RETURN_POPS_ARGS 1.1.1.4 ! root 106: #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) \ 1.1 root 107: (TREE_CODE (FUNTYPE) == IDENTIFIER_NODE ? 0 \ 108: : (TARGET_RTD \ 109: && (TYPE_ARG_TYPES (FUNTYPE) == 0 \ 110: || (TREE_VALUE (tree_last (TYPE_ARG_TYPES (FUNTYPE))) \ 111: == void_type_node))) ? (SIZE) \ 112: : 0) 113: /* On other 386 systems, the last line looks like this: 1.1.1.2 root 114: : (aggregate_value_p (TREE_TYPE (FUNTYPE))) ? GET_MODE_SIZE (Pmode) : 0) */ 1.1.1.3 root 115: 116: /* Handle #pragma pack. */ 117: #define HANDLE_SYSV_PRAGMA
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