gcc/config/i386/dragonfly.h

   1 /* Definitions for Intel 386 running DragonFly with ELF format
   2    Copyright (C) 2014-2017 Free Software Foundation, Inc.
   3    Contributed by John Marino <gnugcc@marino.st>
   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 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26
  27 /* Override the default comment-starter of "/".  */
  28 #undef  ASM_COMMENT_START
  29 #define ASM_COMMENT_START "#"
  30
  31 #undef  ASM_APP_ON
  32 #define ASM_APP_ON "#APP\n"
  33
  34 #undef  ASM_APP_OFF
  35 #define ASM_APP_OFF "#NO_APP\n"
  36
  37 #undef  DBX_REGISTER_NUMBER
  38 #define DBX_REGISTER_NUMBER(n) \
  39   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  40
  41 #undef  NO_PROFILE_COUNTERS
  42 #define NO_PROFILE_COUNTERS     1
  43
  44 /* Tell final.c that we don't need a label passed to mcount.  */
  45
  46 #undef  MCOUNT_NAME
  47 #define MCOUNT_NAME ".mcount"
  48
  49 /* Make gcc agree with <machine/ansi.h>.  */
  50
  51 #undef  SIZE_TYPE
  52 #define SIZE_TYPE       (TARGET_64BIT ? "long unsigned int" : "unsigned int")
  53
  54 #undef  PTRDIFF_TYPE
  55 #define PTRDIFF_TYPE    (TARGET_64BIT ? "long int" : "int")
  56
  57 #undef  WCHAR_TYPE_SIZE
  58 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD)
  59
  60 #undef  SUBTARGET_EXTRA_SPECS   /* i386.h bogusly defines it.  */
  61 #define SUBTARGET_EXTRA_SPECS \
  62   { "dfbsd_dynamic_linker", DFBSD_DYNAMIC_LINKER }
  63
  64 /* A C statement to output to the stdio stream FILE an assembler
  65    command to advance the location counter to a multiple of 1<<LOG
  66    bytes if it is within MAX_SKIP bytes.
  67
  68    This is used to align code labels according to Intel recommendations.  */
  69
  70 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  71 #undef  ASM_OUTPUT_MAX_SKIP_ALIGN
  72 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)                                  \
  73   if ((LOG) != 0) {                                                                                                             \
  74     if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));    \
  75     else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));    \
  76   }
  77 #endif
  78
  79 /* Don't default to pcc-struct-return, we want to retain compatibility with
  80    older gcc versions AND pcc-struct-return is nonreentrant.
  81    (even though the SVR4 ABI for the i386 says that records and unions are
  82    returned in memory).  */
  83
  84 #undef  DEFAULT_PCC_STRUCT_RETURN
  85 #define DEFAULT_PCC_STRUCT_RETURN 0
  86
  87 /* DragonFly sets the rounding precision of the FPU to 53 bits.  Let the
  88    compiler get the contents of <float.h> and std::numeric_limits correct.  */
  89 #undef TARGET_96_ROUND_53_LONG_DOUBLE
  90 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
  91
  92 /* Static stack checking is supported by means of probes.  */
  93 #define STACK_CHECK_STATIC_BUILTIN 1
  94
  95 /* Support for i386 was removed from DragonFly in 2007  */
  96 #define SUBTARGET32_DEFAULT_CPU "i486"
  97
  98 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack