gcc/config/sparc/sp64-elf.h

   1 /* Definitions of target machine for GNU compiler, for SPARC64, ELF.
   2    Copyright (C) 1994, 1995, 1996, 1997, 1998, 2000
   3    Free Software Foundation, Inc.
   4    Contributed by Doug Evans, dje@cygnus.com.
   5
   6 This file is part of GNU CC.
   7
   8 GNU CC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GNU CC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU CC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 /* ??? We're taking the scheme of including another file and then overriding
  24    the values we don't like a bit too far here.  The alternative is to more or
  25    less duplicate all of svr4.h, sparc/sysv4.h, and sparc/sol2.h here
  26    (suitably cleaned up).  */
  27
  28 #undef TARGET_VERSION
  29 #define TARGET_VERSION fprintf (stderr, " (sparc64-elf)")
  30
  31 /* A 64 bit v9 compiler in a Medium/Anywhere code model environment.  */
  32
  33 #undef TARGET_DEFAULT
  34 #define TARGET_DEFAULT \
  35 (MASK_V9 + MASK_PTR64 + MASK_64BIT + MASK_HARD_QUAD \
  36  + MASK_APP_REGS + MASK_FPU + MASK_STACK_BIAS + MASK_LONG_DOUBLE_128)
  37
  38 #undef SPARC_DEFAULT_CMODEL
  39 #define SPARC_DEFAULT_CMODEL CM_EMBMEDANY
  40
  41 #undef CPP_PREDEFINES
  42 #define CPP_PREDEFINES "-Dsparc -D__ELF__ -Acpu=sparc -Amachine=sparc"
  43
  44 /* __svr4__ is used by the C library (FIXME) */
  45 #undef CPP_SUBTARGET_SPEC
  46 #define CPP_SUBTARGET_SPEC "-D__svr4__"
  47
  48 #undef MD_EXEC_PREFIX
  49 #undef MD_STARTFILE_PREFIX
  50
  51 #undef ASM_SPEC
  52 #define ASM_SPEC "\
  53 %{v:-V} -s %{fpic:-K PIC} %{fPIC:-K PIC} \
  54 %{mlittle-endian:-EL} \
  55 %(asm_cpu) %(asm_arch) \
  56 "
  57
  58 /* This is taken from sol2.h.  */
  59 #undef LINK_SPEC
  60 #define LINK_SPEC "\
  61 %{v:-V} \
  62 %{mlittle-endian:-EL} \
  63 "
  64
  65 /* We need something a little simpler for the embedded environment.
  66    Profiling doesn't really work yet so we just copy the default.  */
  67 #undef STARTFILE_SPEC
  68 #define STARTFILE_SPEC "\
  69 %{!shared:%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}} \
  70 crtbegin.o%s \
  71 "
  72
  73 #undef ENDFILE_SPEC
  74 #define ENDFILE_SPEC \
  75   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  76    crtend.o%s"
  77
  78 /* Use the default (for now).  */
  79 #undef LIB_SPEC
  80
  81 /* V9 chips can handle either endianness.  */
  82 #undef SUBTARGET_SWITCHES
  83 #define SUBTARGET_SWITCHES \
  84 {"big-endian", -MASK_LITTLE_ENDIAN, N_("Generate code for big endian") }, \
  85 {"little-endian", MASK_LITTLE_ENDIAN, N_("Generate code for little endian") },
  86
  87 #undef BYTES_BIG_ENDIAN
  88 #define BYTES_BIG_ENDIAN (! TARGET_LITTLE_ENDIAN)
  89
  90 #undef WORDS_BIG_ENDIAN
  91 #define WORDS_BIG_ENDIAN (! TARGET_LITTLE_ENDIAN)
  92
  93 /* ??? This should be 32 bits for v9 but what can we do?  */
  94 #undef WCHAR_TYPE
  95 #define WCHAR_TYPE "short unsigned int"
  96
  97 #undef WCHAR_TYPE_SIZE
  98 #define WCHAR_TYPE_SIZE 16
  99
 100 #undef LONG_DOUBLE_TYPE_SIZE
 101 #define LONG_DOUBLE_TYPE_SIZE 128
 102
 103 /* The medium/anywhere code model practically requires us to put jump tables
 104    in the text section as gcc is unable to distinguish LABEL_REF's of jump
 105    tables from other label refs (when we need to).  */
 106 /* But we now defer the tables to the end of the function, so we make
 107    this 0 to not confuse the branch shortening code.  */
 108 #undef JUMP_TABLES_IN_TEXT_SECTION
 109 #define JUMP_TABLES_IN_TEXT_SECTION 0
 110
 111 /* System V Release 4 uses DWARF debugging info.
 112    GDB doesn't support 64 bit stabs yet and the desired debug format is DWARF
 113    anyway so it is the default.  */
 114
 115 #define DBX_DEBUGGING_INFO 1
 116
 117 #undef PREFERRED_DEBUGGING_TYPE
 118 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG