gnu/dist/gcc4/gcc/config/rs6000/vxworks.h

   1 /* Definitions of target machine for GNU compiler.  Vxworks PowerPC version.
   2    Copyright (C) 1996, 2000, 2002, 2003, 2004, 2005
   3    Free Software Foundation, Inc.
   4    Contributed by CodeSourcery, LLC.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 /* Note to future editors: VxWorks is mostly an EABI target.  We do
  24    not use rs6000/eabi.h because we would have to override most of
  25    it anyway.  However, if you change that file, consider making
  26    analogous changes here too.  */
  27
  28 #undef TARGET_VERSION
  29 #define TARGET_VERSION fprintf (stderr, " (PowerPC VxWorks)");
  30
  31 /* CPP predefined macros.  */
  32
  33 #undef TARGET_OS_CPP_BUILTINS
  34 #define TARGET_OS_CPP_BUILTINS()                \
  35   do                                            \
  36     {                                           \
  37       builtin_define ("__ppc");                 \
  38       builtin_define ("__EABI__");              \
  39       builtin_define ("__ELF__");               \
  40       builtin_define ("__vxworks");             \
  41       builtin_define ("__VXWORKS__");           \
  42       if (!TARGET_SOFT_FLOAT)                   \
  43         builtin_define ("__hardfp");            \
  44       if (flag_pic == 2)                        \
  45         {                                       \
  46           builtin_define ("__PIC__=2");         \
  47           builtin_define ("__pic__=2");         \
  48         }                                       \
  49       else if (flag_pic == 1)                   \
  50         {                                       \
  51           builtin_define ("__PIC__=1");         \
  52           builtin_define ("__pic__=1");         \
  53         }                                       \
  54                                                 \
  55       /* C89 namespace violation! */            \
  56       builtin_define ("CPU_FAMILY=PPC");        \
  57     }                                           \
  58   while (0)
  59
  60 /* Only big endian PPC is supported by VxWorks.  */
  61 #undef BYTES_BIG_ENDIAN
  62 #define BYTES_BIG_ENDIAN 1
  63
  64 /* We have to kill off the entire specs set created by rs6000/sysv4.h
  65    and substitute our own set.  The top level vxworks.h has done some
  66    of this for us.  */
  67
  68 #undef SUBTARGET_EXTRA_SPECS
  69 #undef CPP_SPEC
  70 #undef CC1_SPEC
  71 #undef ASM_SPEC
  72
  73 #define SUBTARGET_EXTRA_SPECS /* none needed */
  74
  75 /* FIXME: The only reason we allow no -mcpu switch at all is because
  76    config-ml.in insists on a "." multilib. */
  77 #define CPP_SPEC \
  78 "%{!DCPU=*:               \
  79    %{mcpu=403 : -DCPU=PPC403  ; \
  80      mcpu=405 : -DCPU=PPC405  ; \
  81      mcpu=440 : -DCPU=PPC440  ; \
  82      mcpu=603 : -DCPU=PPC603  ; \
  83      mcpu=604 : -DCPU=PPC604  ; \
  84      mcpu=860 : -DCPU=PPC860  ; \
  85      mcpu=8540: -DCPU=PPC85XX ; \
  86               : -DCPU=PPC604  }}" \
  87 VXWORKS_ADDITIONAL_CPP_SPEC
  88
  89 #define CC1_SPEC                                                \
  90 "%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default}      \
  91  %{mlittle|mlittle-endian:-mstrict-align}                       \
  92  %{profile: -p}         \
  93  %{fvec:-maltivec} %{fvec-eabi:-maltivec -mabi=altivec}"
  94
  95 #define ASM_SPEC \
  96 "%(asm_cpu) \
  97  %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
  98  %{v:-v} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
  99  %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} -mbig"
 100
 101 #undef  LIB_SPEC
 102 #define LIB_SPEC VXWORKS_LIB_SPEC
 103 #undef  LINK_SPEC
 104 #define LINK_SPEC VXWORKS_LINK_SPEC
 105 #undef  STARTFILE_SPEC
 106 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
 107 #undef  ENDFILE_SPEC
 108 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
 109
 110 /* There is no default multilib.  */
 111 #undef MULTILIB_DEFAULTS
 112
 113 #undef TARGET_DEFAULT
 114 #define TARGET_DEFAULT \
 115   (MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_EABI | MASK_STRICT_ALIGN)
 116
 117 #undef PROCESSOR_DEFAULT
 118 #define PROCESSOR_DEFAULT PROCESSOR_PPC604
 119
 120 /* Nor sdata, for kernel mode.  We use this in
 121    SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized.  */
 122 #undef SDATA_DEFAULT_SIZE
 123 #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0)
 124
 125 #undef  STACK_BOUNDARY
 126 #define STACK_BOUNDARY (16*BITS_PER_UNIT)
 127 /* Override sysv4.h, reset to the default.  */
 128 #undef  PREFERRED_STACK_BOUNDARY
 129
 130 /* Enable SPE */
 131 #undef TARGET_SPE_ABI
 132 #undef TARGET_SPE
 133 #undef TARGET_E500
 134 #undef TARGET_ISEL
 135 #undef TARGET_FPRS
 136
 137 #define TARGET_SPE_ABI rs6000_spe_abi
 138 #define TARGET_SPE rs6000_spe
 139 #define TARGET_E500 (rs6000_cpu == PROCESSOR_PPC8540)
 140 #define TARGET_ISEL rs6000_isel
 141 #define TARGET_FPRS (!rs6000_float_gprs)
 142
 143 /* Make -mcpu=8540 imply SPE.  ISEL is automatically enabled, the
 144    others must be done by hand.  Handle -mrtp.  Disable -fPIC
 145    for -mrtp - the VxWorks PIC model is not compatible with it.  */
 146 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
 147 #define SUBSUBTARGET_OVERRIDE_OPTIONS           \
 148   do {                                          \
 149     if (TARGET_E500)                            \
 150       {                                         \
 151         rs6000_spe = 1;                         \
 152         rs6000_spe_abi = 1;                     \
 153         rs6000_float_gprs = 1;                  \
 154       }                                         \
 155                                                 \
 156   if (!g_switch_set)                            \
 157     g_switch_value = SDATA_DEFAULT_SIZE;        \
 158   VXWORKS_OVERRIDE_OPTIONS;                     \
 159   } while (0)
 160
 161 /* No _mcount profiling on VxWorks.  */
 162 #undef FUNCTION_PROFILER
 163 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)