gcc-4.1.2/gcc/config/i386/lynx.h

   1 /* Definitions for LynxOS on i386.
   2    Copyright (C) 1993, 1995, 1996, 2002, 2004, 2005
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC 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 GCC 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 GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 #define TARGET_VERSION fputs (" (i386/LynxOS)", stderr);
  23
  24 #define TARGET_OS_CPP_BUILTINS()                \
  25   do                                            \
  26     {                                           \
  27       builtin_define ("__LITTLE_ENDIAN__");     \
  28       builtin_define ("__x86__");               \
  29     }                                           \
  30   while (0)
  31
  32 /* The svr4 ABI for the i386 says that records and unions are returned
  33    in memory.  */
  34
  35 #define DEFAULT_PCC_STRUCT_RETURN 1
  36
  37 /* BSS_SECTION_ASM_OP gets defined i386/unix.h.  */
  38
  39 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  40   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  41
  42 /* LynxOS's GDB counts the floating point registers from 16.  */
  43
  44 #undef DBX_REGISTER_NUMBER
  45 #define DBX_REGISTER_NUMBER(n)                                          \
  46   (TARGET_64BIT ? dbx64_register_map[n]                                 \
  47    : (n) == 0 ? 0                                                       \
  48    : (n) == 1 ? 2                                                       \
  49    : (n) == 2 ? 1                                                       \
  50    : (n) == 3 ? 3                                                       \
  51    : (n) == 4 ? 6                                                       \
  52    : (n) == 5 ? 7                                                       \
  53    : (n) == 6 ? 5                                                       \
  54    : (n) == 7 ? 4                                                       \
  55    : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) + 8        \
  56    : (-1))
  57
  58 /* A C statement to output to the stdio stream FILE an assembler
  59    command to advance the location counter to a multiple of 1<<LOG
  60    bytes if it is within MAX_SKIP bytes.
  61
  62    This is used to align code labels according to Intel recommendations.  */
  63
  64 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  65 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  66   do {                                                                  \
  67     if ((LOG) != 0) {                                                   \
  68       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  69       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));  \
  70     }                                                                   \
  71   } while (0)
  72 #endif
  73
  74 /* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway.  We define it in
  75    config/lynx.h.  */
  76
  77 #undef SUBTARGET_EXTRA_SPECS
  78
  79 /* Undefine the definition from att.h to enable our default.  */
  80
  81 #undef ASM_OUTPUT_ALIGN
  82
  83 /* Undefine the definition from elfos.h to enable our default.  */
  84
  85 #undef PREFERRED_DEBUGGING_TYPE
  86
  87 /* The file i386.c defines TARGET_HAVE_TLS unconditionally if
  88    HAVE_AS_TLS is defined.  HAVE_AS_TLS is defined as gas support for
  89    TLS is detected by configure.  We undefine it here.  */
  90
  91 #undef HAVE_AS_TLS