gcc/config/i860/sysv3.h

   1 /* Target definitions for GNU compiler for Intel 80860 running System V.3
   2    Copyright (C) 1991, 1996, 2000 Free Software Foundation, Inc.
   3    Contributed by Ron Guilmette (rfg@monkeys.com).
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #undef TARGET_VERSION
  23 #define TARGET_VERSION fprintf (stderr, " (i860, System V Release 3)")
  24
  25 /* Provide a set of pre-definitions and pre-assertions appropriate for
  26    the i860 running svr3.  */
  27 #define CPP_PREDEFINES "-Di860 -Dunix -D__svr3__ -Asystem=unix -Asystem=svr3 -Acpu=i860 -Amachine=i860"
  28
  29 /* Use crt1.o as a startup file and crtn.o as a closing file.  */
  30
  31 #define STARTFILE_SPEC  \
  32   "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}"
  33
  34 #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s"
  35
  36 /* Special flags for the linker.  I don't know what they do.  */
  37
  38 #define LINK_SPEC "%{T*} %{z:-lm}"
  39
  40 /* The prefix to be used in assembler output for all names of registers.
  41    None is needed in V.3.  */
  42
  43 #define I860_REG_PREFIX ""
  44
  45 /* Delimiter that starts comments in the assembler code.  */
  46
  47 #define ASM_COMMENT_START "//"
  48
  49 /* Output the special word the System V SDB wants to see just before
  50    the first word of each function's prologue code.  */
  51
  52 extern const char *current_function_original_name;
  53
  54 /* This special macro is used to output a magic word just before the
  55    first word of each function.  On some versions of UNIX running on
  56    the i860, this word can be any word that looks like a NOP, however
  57    under svr4, this neds to be an `shr r0,r0,r0' instruction in which
  58    the normally unused low-order bits contain the length of the function
  59    prologue code (in bytes).  This is needed to make the System V SDB
  60    debugger happy.  */
  61
  62 #undef ASM_OUTPUT_FUNCTION_PREFIX
  63 #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME)                        \
  64   do {  ASM_OUTPUT_ALIGN (FILE, 2);                                     \
  65         fprintf ((FILE), "\t.long\t.ep.");                              \
  66         assemble_name (FILE, FNNAME);                                   \
  67         fprintf (FILE, "-");                                            \
  68         assemble_name (FILE, FNNAME);                                   \
  69         fprintf (FILE, "+0xc8000000\n");                                \
  70         current_function_original_name = (FNNAME);                      \
  71   } while (0)
  72
  73 /* Output the special label that must go just after each function's
  74    prologue code to support svr4 SDB.  */
  75
  76 #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE)                                \
  77   do {  fprintf (FILE, ".ep.");                                         \
  78         assemble_name (FILE, current_function_original_name);           \
  79         fprintf (FILE, ":\n");                                          \
  80   } while (0)
  81
  82 /* This says how to output an assembler line
  83    to define a local common symbol.
  84    The difference from svr3.h is we don't limit align to 2.  */
  85
  86 #undef ASM_OUTPUT_LOCAL
  87 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)     \
  88   do {                                                  \
  89     int align = exact_log2 (ROUNDED);                   \
  90     data_section ();                                    \
  91     ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \
  92     ASM_OUTPUT_LABEL ((FILE), (NAME));                  \
  93     fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED));     \
  94   } while (0)
  95
  96 /* The routine used to output string literals.  */
  97
  98 #define ASCII_DATA_ASM_OP       "\t.byte\t"
  99
 100 #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH)                             \
 101   do                                                                    \
 102     {                                                                   \
 103       register const unsigned char *str = (const unsigned char *) (STR); \
 104       register const unsigned char *limit = str + (LENGTH);             \
 105       register unsigned bytes_in_chunk = 0;                             \
 106       for (; str < limit; str++)                                        \
 107         {                                                               \
 108           register unsigned ch = *str;                                  \
 109           if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127)          \
 110             {                                                           \
 111               if (bytes_in_chunk > 0)                                   \
 112                 {                                                       \
 113                   fprintf ((FILE), "\"\n");                             \
 114                   bytes_in_chunk = 0;                                   \
 115                 }                                                       \
 116               assemble_aligned_integer (1, GEN_INT (ch));               \
 117             }                                                           \
 118           else                                                          \
 119             {                                                           \
 120               if (bytes_in_chunk >= 60)                                 \
 121                 {                                                       \
 122                   fprintf ((FILE), "\"\n");                             \
 123                   bytes_in_chunk = 0;                                   \
 124                 }                                                       \
 125               if (bytes_in_chunk == 0)                                  \
 126                 fprintf ((FILE), "%s\"", ASCII_DATA_ASM_OP);            \
 127               putc (ch, (FILE));                                        \
 128               bytes_in_chunk++;                                         \
 129             }                                                           \
 130         }                                                               \
 131       if (bytes_in_chunk > 0)                                           \
 132         fprintf ((FILE), "\"\n");                                       \
 133     }                                                                   \
 134   while (0)
 135
 136
 137 #undef CTORS_SECTION_ASM_OP
 138 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors,\"x\""
 139 #undef DTORS_SECTION_ASM_OP
 140 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors,\"x\""
 141
 142 /* Add definitions to support the .tdesc section as specified in the svr4
 143    ABI for the i860.  */
 144
 145 #define TDESC_SECTION_ASM_OP    "\t.section\t.tdesc"
 146
 147 #undef EXTRA_SECTIONS
 148 #define EXTRA_SECTIONS in_const, in_tdesc
 149
 150 #undef EXTRA_SECTION_FUNCTIONS
 151 #define EXTRA_SECTION_FUNCTIONS                                         \
 152   CONST_SECTION_FUNCTION                                                \
 153   TDESC_SECTION_FUNCTION
 154
 155 #define TDESC_SECTION_FUNCTION                                          \
 156 void                                                                    \
 157 tdesc_section ()                                                        \
 158 {                                                                       \
 159   if (in_section != in_tdesc)                                           \
 160     {                                                                   \
 161       fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP);             \
 162       in_section = in_tdesc;                                            \
 163     }                                                                   \
 164 }
 165
 166 /* Enable the `const' section that svr3.h defines how to use.  */
 167 #undef USE_CONST_SECTION
 168 #define USE_CONST_SECTION       1