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Annotation of GNUtools/cc/config/i386/sequent.h, revision 1.1

1.1     ! root        1: /* Definitions for Sequent Intel 386.
        !             2:    Copyright (C) 1988 Free Software Foundation, Inc.
        !             3: 
        !             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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            19: 
        !            20: #include "i386/i386.h"
        !            21: 
        !            22: /* Use the BSD assembler syntax.  */
        !            23: 
        !            24: #include "i386/bsd.h"
        !            25: 
        !            26: /* By default, don't use IEEE compatible arithmetic comparisons
        !            27:    because the assembler can't handle the fucom insn.
        !            28:    Return float values in the 387.
        !            29:    (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387) */
        !            30: 
        !            31: #undef TARGET_DEFAULT
        !            32: #define TARGET_DEFAULT 0201
        !            33: 
        !            34: /* Specify predefined symbols in preprocessor.  */
        !            35: 
        !            36: #define CPP_PREDEFINES "-Dunix -Di386 -Dsequent -Asystem(unix) -Acpu(i386) -Amachine(i386)"
        !            37: 
        !            38: /* Pass -Z and -ZO options to the linker.  */
        !            39: 
        !            40: #define LINK_SPEC "%{Z*}"
        !            41: 
        !            42: #if 0 /* Dynix 3.1 is said to accept -L.  */
        !            43: /* Dynix V3.0.12 doesn't accept -L at all.  */
        !            44: 
        !            45: #define LINK_LIBGCC_SPECIAL
        !            46: #endif
        !            47: 
        !            48: /* Link with libg.a when debugging, for dbx's sake.  */
        !            49: 
        !            50: #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
        !            51: 
        !            52: /* We don't want to output SDB debugging information.  */
        !            53: 
        !            54: #undef SDB_DEBUGGING_INFO
        !            55: 
        !            56: /* We want to output DBX debugging information.  */
        !            57: 
        !            58: #define DBX_DEBUGGING_INFO
        !            59: 
        !            60: /* Sequent Symmetry has size_t defined as int in /usr/include/sys/types.h */
        !            61: #define SIZE_TYPE "int"
        !            62: 
        !            63: /* gcc order is ax, dx, cx, bx, si, di, bp, sp, st, st.
        !            64:  * dbx order is ax, dx, cx, st(0), st(1), bx, si, di, st(2), st(3),
        !            65:  *             st(4), st(5), st(6), st(7), sp, bp  */
        !            66: 
        !            67: /* ??? The right thing would be to change the ordering of the
        !            68:    registers to correspond to the conventions of this system,
        !            69:    and get rid of DBX_REGISTER_NUMBER.  */
        !            70: 
        !            71: #undef DBX_REGISTER_NUMBER
        !            72: #define DBX_REGISTER_NUMBER(n)         \
        !            73: ((n) < 3 ? (n) : (n) < 6 ? (n) + 2     \
        !            74:  : (n) == 6 ? 15 : (n) == 7 ? 14 : 3)
        !            75: 
        !            76: /* [email protected] says these two definitions
        !            77:    fix trouble in dbx.  */
        !            78: #undef DBX_OUTPUT_LBRAC
        !            79: #define DBX_OUTPUT_LBRAC(file,name)    \
        !            80:              fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_LBRAC, depth); \
        !            81:              assemble_name (asmfile, buf); \
        !            82:              fprintf (asmfile, "\n");
        !            83: 
        !            84: #undef DBX_OUTPUT_RBRAC
        !            85: #define DBX_OUTPUT_RBRAC(file,name)    \
        !            86:              fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_RBRAC, depth); \
        !            87:              assemble_name (asmfile, buf); \
        !            88:              fprintf (asmfile, "\n");
        !            89: 
        !            90: /* Prevent anything from being allocated in the register pair cx/bx,
        !            91:    since that would confuse GDB.  */
        !            92: 
        !            93: #undef HARD_REGNO_MODE_OK
        !            94: #define HARD_REGNO_MODE_OK(REGNO, MODE) \
        !            95:   (((REGNO) < 2 ? 1                                                    \
        !            96:     : (REGNO) < 4 ? 1                                                  \
        !            97:     : FP_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_FLOAT         \
        !            98:                            || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
        !            99:     : (MODE) != QImode)                                                        \
        !           100:    && ! (REGNO == 2 && GET_MODE_UNIT_SIZE (MODE) > 4))
        !           101: 
        !           102: /* Output assembler code to FILE to increment profiler label # LABELNO
        !           103:    for profiling a function entry. */
        !           104: 
        !           105: #undef FUNCTION_PROFILER
        !           106: #define FUNCTION_PROFILER(FILE, LABELNO)  \
        !           107:    fprintf (FILE, "\tmovl $.LP%d,%%eax\n\tcall mcount\n", (LABELNO));
        !           108: 
        !           109: /* Assembler pseudo-op for shared data segment. */
        !           110: #define SHARED_SECTION_ASM_OP ".shdata"
        !           111: 
        !           112: /* A C statement or statements which output an assembler instruction
        !           113:    opcode to the stdio stream STREAM.  The macro-operand PTR is a
        !           114:    variable of type `char *' which points to the opcode name in its
        !           115:    "internal" form--the form that is written in the machine description.
        !           116: 
        !           117:    The Sequent assembler (identified as "Balance 8000 Assembler
        !           118:    07/17/85 3.90" by "as -v") does not understand the `movs[bwl]' string
        !           119:    move mnemonics - it uses `smov[bwl]' instead.  Change "movs" into
        !           120:    "smov", carefully avoiding the sign-extend opcodes.  */
        !           121: 
        !           122: #define ASM_OUTPUT_OPCODE(STREAM, PTR) \
        !           123: {                                                                      \
        !           124:   if ((PTR)[0] == 'm'                                                  \
        !           125:       && (PTR)[1] == 'o'                                               \
        !           126:       && (PTR)[2] == 'v'                                               \
        !           127:       && (PTR)[3] == 's'                                               \
        !           128:       && ((PTR)[4] == 'b' || (PTR)[4] == 'w' || (PTR)[4] == 'l')       \
        !           129:       && ((PTR)[5] == ' ' || (PTR)[5] == '\t'|| (PTR)[5] == '\0'))     \
        !           130:     {                                                                  \
        !           131:       fprintf (STREAM, "smov");                                                \
        !           132:       (PTR) += 4;                                                      \
        !           133:     }                                                                  \
        !           134: }
        !           135: 
        !           136: /* 10-Aug-92 pes  Local labels are prefixed with ".L" */
        !           137: #undef LPREFIX
        !           138: #define LPREFIX ".L"
        !           139: 
        !           140: #undef ASM_GENERATE_INTERNAL_LABEL
        !           141: #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)\
        !           142:   sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
        !           143: 
        !           144: #undef ASM_OUTPUT_INTERNAL_LABEL
        !           145: #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)\
        !           146:   fprintf (FILE, ".%s%d:\n", PREFIX, NUM)

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