gcc/config/i386/lynx.h

   1 /* Definitions for LynxOS on i386.
   2    Copyright (C) 1993, 1995, 1996, 2002, 2004, 2005, 2007
   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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define TARGET_VERSION fputs (" (i386/LynxOS)", stderr);
  22
  23 #define TARGET_OS_CPP_BUILTINS()                \
  24   do                                            \
  25     {                                           \
  26       builtin_define ("__LITTLE_ENDIAN__");     \
  27       builtin_define ("__x86__");               \
  28     }                                           \
  29   while (0)
  30
  31 /* The svr4 ABI for the i386 says that records and unions are returned
  32    in memory.  */
  33
  34 #define DEFAULT_PCC_STRUCT_RETURN 1
  35
  36 /* BSS_SECTION_ASM_OP gets defined i386/unix.h.  */
  37
  38 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  39   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  40
  41 /* LynxOS's GDB counts the floating point registers from 16.  */
  42
  43 #undef DBX_REGISTER_NUMBER
  44 #define DBX_REGISTER_NUMBER(n)                                          \
  45   (TARGET_64BIT ? dbx64_register_map[n]                                 \
  46    : (n) == 0 ? 0                                                       \
  47    : (n) == 1 ? 2                                                       \
  48    : (n) == 2 ? 1                                                       \
  49    : (n) == 3 ? 3                                                       \
  50    : (n) == 4 ? 6                                                       \
  51    : (n) == 5 ? 7                                                       \
  52    : (n) == 6 ? 5                                                       \
  53    : (n) == 7 ? 4                                                       \
  54    : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) + 8        \
  55    : (-1))
  56
  57 /* A C statement to output to the stdio stream FILE an assembler
  58    command to advance the location counter to a multiple of 1<<LOG
  59    bytes if it is within MAX_SKIP bytes.
  60
  61    This is used to align code labels according to Intel recommendations.  */
  62
  63 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  64 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  65   do {                                                                  \
  66     if ((LOG) != 0) {                                                   \
  67       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  68       else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));  \
  69     }                                                                   \
  70   } while (0)
  71 #endif
  72
  73 /* Undefine SUBTARGET_EXTRA_SPECS it is empty anyway.  We define it in
  74    config/lynx.h.  */
  75
  76 #undef SUBTARGET_EXTRA_SPECS
  77
  78 /* Undefine the definition from att.h to enable our default.  */
  79
  80 #undef ASM_OUTPUT_ALIGN
  81
  82 /* Undefine the definition from elfos.h to enable our default.  */
  83
  84 #undef PREFERRED_DEBUGGING_TYPE
  85
  86 /* The file i386.c defines TARGET_HAVE_TLS unconditionally if
  87    HAVE_AS_TLS is defined.  HAVE_AS_TLS is defined as gas support for
  88    TLS is detected by configure.  We undefine it here.  */
  89
  90 #undef HAVE_AS_TLS