gcc/config/i386/sequent.h

   1 /* Definitions for Sequent Intel 386.
   2    Copyright (C) 1988, 1994 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, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "i386/i386.h"
  22
  23 /* Use the BSD assembler syntax.  */
  24
  25 #include "i386/bsd.h"
  26
  27 /* By default, don't use IEEE compatible arithmetic comparisons
  28    because the assembler can't handle the fucom insn.
  29    Return float values in the 387.
  30    (TARGET_80387 | TARGET_FLOAT_RETURNS_IN_80387) */
  31
  32 #undef TARGET_DEFAULT
  33 #define TARGET_DEFAULT 0201
  34
  35 /* Specify predefined symbols in preprocessor.  */
  36
  37 #define CPP_PREDEFINES "-Dunix -Di386 -Dsequent -Asystem(unix) -Acpu(i386) -Amachine(i386)"
  38
  39 /* Pass -Z and -ZO options to the linker.  */
  40
  41 #define LINK_SPEC "%{Z*}"
  42
  43 #if 0 /* Dynix 3.1 is said to accept -L.  */
  44 /* Dynix V3.0.12 doesn't accept -L at all.  */
  45
  46 #define LINK_LIBGCC_SPECIAL
  47 #endif
  48
  49 /* Link with libg.a when debugging, for dbx's sake.  */
  50
  51 #define LIB_SPEC "%{g:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} "
  52
  53 /* We don't want to output SDB debugging information.  */
  54
  55 #undef SDB_DEBUGGING_INFO
  56
  57 /* We want to output DBX debugging information.  */
  58
  59 #define DBX_DEBUGGING_INFO
  60
  61 /* Sequent Symmetry has size_t defined as int in /usr/include/sys/types.h */
  62 #define SIZE_TYPE "int"
  63
  64 /* gcc order is ax, dx, cx, bx, si, di, bp, sp, st, st.
  65  * dbx order is ax, dx, cx, st(0), st(1), bx, si, di, st(2), st(3),
  66  *              st(4), st(5), st(6), st(7), sp, bp  */
  67
  68 /* ??? The right thing would be to change the ordering of the
  69    registers to correspond to the conventions of this system,
  70    and get rid of DBX_REGISTER_NUMBER.  */
  71
  72 #undef DBX_REGISTER_NUMBER
  73 #define DBX_REGISTER_NUMBER(n)          \
  74 ((n) < 3 ? (n) : (n) < 6 ? (n) + 2      \
  75  : (n) == 6 ? 15 : (n) == 7 ? 14 : 3)
  76
  77 /* malcolmp@hydra.maths.unsw.EDU.AU says these two definitions
  78    fix trouble in dbx.  */
  79 #undef DBX_OUTPUT_LBRAC
  80 #define DBX_OUTPUT_LBRAC(file,name)     \
  81               fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_LBRAC, depth); \
  82               assemble_name (asmfile, buf); \
  83               fprintf (asmfile, "\n");
  84
  85 #undef DBX_OUTPUT_RBRAC
  86 #define DBX_OUTPUT_RBRAC(file,name)     \
  87               fprintf (asmfile, "%s %d,0,%d,", ASM_STABN_OP, N_RBRAC, depth); \
  88               assemble_name (asmfile, buf); \
  89               fprintf (asmfile, "\n");
  90
  91 /* Prevent anything from being allocated in the register pair cx/bx,
  92    since that would confuse GDB.  */
  93
  94 #undef HARD_REGNO_MODE_OK
  95 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
  96   (((REGNO) < 2 ? 1                                                     \
  97     : (REGNO) < 4 ? 1                                                   \
  98     : FP_REGNO_P (REGNO) ? (GET_MODE_CLASS (MODE) == MODE_FLOAT         \
  99                             || GET_MODE_CLASS (MODE) == MODE_COMPLEX_FLOAT) \
 100     : (MODE) != QImode)                                                 \
 101    && ! (REGNO == 2 && GET_MODE_UNIT_SIZE (MODE) > 4))
 102
 103 /* Output assembler code to FILE to increment profiler label # LABELNO
 104    for profiling a function entry. */
 105
 106 #undef FUNCTION_PROFILER
 107 #define FUNCTION_PROFILER(FILE, LABELNO)  \
 108    fprintf (FILE, "\tmovl $.LP%d,%%eax\n\tcall mcount\n", (LABELNO));
 109
 110 /* Assembler pseudo-op for shared data segment. */
 111 #define SHARED_SECTION_ASM_OP ".shdata"
 112
 113 /* A C statement or statements which output an assembler instruction
 114    opcode to the stdio stream STREAM.  The macro-operand PTR is a
 115    variable of type `char *' which points to the opcode name in its
 116    "internal" form--the form that is written in the machine description.
 117
 118    The Sequent assembler (identified as "Balance 8000 Assembler
 119    07/17/85 3.90" by "as -v") does not understand the `movs[bwl]' string
 120    move mnemonics - it uses `smov[bwl]' instead.  Change "movs" into
 121    "smov", carefully avoiding the sign-extend opcodes.  */
 122
 123 #define ASM_OUTPUT_OPCODE(STREAM, PTR)  \
 124 {                                                                       \
 125   if ((PTR)[0] == 'm'                                                   \
 126       && (PTR)[1] == 'o'                                                \
 127       && (PTR)[2] == 'v'                                                \
 128       && (PTR)[3] == 's'                                                \
 129       && ((PTR)[4] == 'b' || (PTR)[4] == 'w' || (PTR)[4] == 'l')        \
 130       && ((PTR)[5] == ' ' || (PTR)[5] == '\t'|| (PTR)[5] == '\0'))      \
 131     {                                                                   \
 132       fprintf (STREAM, "smov");                                         \
 133       (PTR) += 4;                                                       \
 134     }                                                                   \
 135 }
 136
 137 /* 10-Aug-92 pes  Local labels are prefixed with ".L" */
 138 #undef LPREFIX
 139 #define LPREFIX ".L"
 140
 141 #undef ASM_GENERATE_INTERNAL_LABEL
 142 #define ASM_GENERATE_INTERNAL_LABEL(BUF,PREFIX,NUMBER)\
 143   sprintf ((BUF), "*.%s%d", (PREFIX), (NUMBER))
 144
 145 #undef ASM_OUTPUT_INTERNAL_LABEL
 146 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)\
 147   fprintf (FILE, ".%s%d:\n", PREFIX, NUM)
 148
 149 /* The native compiler passes the address of the returned structure in eax. */
 150 #undef STRUCT_VALUE
 151 #undef STRUCT_VALUE_INCOMING
 152 #define STRUCT_VALUE_REGNUM     0