gcc/config/i386/sequent.h

   1 /* Definitions for Sequent Intel 386.
   2    Copyright (C) 1988, 1994, 1999 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
  31 #undef TARGET_DEFAULT
  32 #define TARGET_DEFAULT (MASK_80387 | MASK_FLOAT_RETURNS)
  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 /* malcolmp@hydra.maths.unsw.EDU.AU 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)
 147
 148 /* The native compiler passes the address of the returned structure in eax. */
 149 #undef STRUCT_VALUE
 150 #undef STRUCT_VALUE_INCOMING
 151 #define STRUCT_VALUE_REGNUM     0