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                                                 \
  45       /* C89 namespace violation! */            \
  46       builtin_define ("CPU_FAMILY=PPC");        \
  47     }                                           \
  48   while (0)
  49
  50 /* Only big endian PPC is supported by VxWorks.  */
  51 #undef BYTES_BIG_ENDIAN
  52 #define BYTES_BIG_ENDIAN 1
  53
  54 /* We have to kill off the entire specs set created by rs6000/sysv4.h
  55    and substitute our own set.  The top level vxworks.h has done some
  56    of this for us.  */
  57
  58 #undef SUBTARGET_EXTRA_SPECS
  59 #undef CPP_SPEC
  60 #undef CC1_SPEC
  61 #undef ASM_SPEC
  62
  63 #define SUBTARGET_EXTRA_SPECS /* none needed */
  64
  65 /* FIXME: The only reason we allow no -mcpu switch at all is because
  66    config-ml.in insists on a "." multilib. */
  67 #define CPP_SPEC \
  68 "%{!DCPU=*:               \
  69    %{mcpu=403 : -DCPU=PPC403  ; \
  70      mcpu=405 : -DCPU=PPC405  ; \
  71      mcpu=440 : -DCPU=PPC440  ; \
  72      mcpu=603 : -DCPU=PPC603  ; \
  73      mcpu=604 : -DCPU=PPC604  ; \
  74      mcpu=860 : -DCPU=PPC860  ; \
  75      mcpu=8540: -DCPU=PPC85XX ; \
  76               : -DCPU=PPC604  }}" \
  77 VXWORKS_ADDITIONAL_CPP_SPEC
  78
  79 #define CC1_SPEC                                                \
  80 "%{G*} %{mno-sdata:-msdata=none} %{msdata:-msdata=default}      \
  81  %{mlittle|mlittle-endian:-mstrict-align}                       \
  82  %{profile: -p}         \
  83  %{fvec:-maltivec} %{fvec-eabi:-maltivec -mabi=altivec}"
  84
  85 #define ASM_SPEC \
  86 "%(asm_cpu) \
  87  %{.s: %{mregnames} %{mno-regnames}} %{.S: %{mregnames} %{mno-regnames}} \
  88  %{v:-v} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
  89  %{mrelocatable} %{mrelocatable-lib} %{fpic:-K PIC} %{fPIC:-K PIC} -mbig"
  90
  91 #undef  LIB_SPEC
  92 #define LIB_SPEC VXWORKS_LIB_SPEC
  93 #undef  LINK_SPEC
  94 #define LINK_SPEC VXWORKS_LINK_SPEC
  95 #undef  STARTFILE_SPEC
  96 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC
  97 #undef  ENDFILE_SPEC
  98 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC
  99
 100 /* There is no default multilib.  */
 101 #undef MULTILIB_DEFAULTS
 102
 103 #undef TARGET_DEFAULT
 104 #define TARGET_DEFAULT \
 105   (MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_EABI | MASK_STRICT_ALIGN)
 106
 107 #undef PROCESSOR_DEFAULT
 108 #define PROCESSOR_DEFAULT PROCESSOR_PPC604
 109
 110 /* Nor sdata, for kernel mode.  We use this in
 111    SUBSUBTARGET_INITIALIZE_OPTIONS, after rs6000_rtp has been initialized.  */
 112 #undef SDATA_DEFAULT_SIZE
 113 #define SDATA_DEFAULT_SIZE (TARGET_VXWORKS_RTP ? 8 : 0)
 114
 115 #undef  STACK_BOUNDARY
 116 #define STACK_BOUNDARY (16*BITS_PER_UNIT)
 117 /* Override sysv4.h, reset to the default.  */
 118 #undef  PREFERRED_STACK_BOUNDARY
 119
 120 /* Enable SPE */
 121 #undef TARGET_SPE_ABI
 122 #undef TARGET_SPE
 123 #undef TARGET_E500
 124 #undef TARGET_ISEL
 125 #undef TARGET_FPRS
 126
 127 #define TARGET_SPE_ABI rs6000_spe_abi
 128 #define TARGET_SPE rs6000_spe
 129 #define TARGET_E500 (rs6000_cpu == PROCESSOR_PPC8540)
 130 #define TARGET_ISEL rs6000_isel
 131 #define TARGET_FPRS (!rs6000_float_gprs)
 132
 133 /* Make -mcpu=8540 imply SPE.  ISEL is automatically enabled, the
 134    others must be done by hand.  Handle -mrtp.  Disable -fPIC
 135    for -mrtp - the VxWorks PIC model is not compatible with it.  */
 136 #undef SUBSUBTARGET_OVERRIDE_OPTIONS
 137 #define SUBSUBTARGET_OVERRIDE_OPTIONS           \
 138   do {                                          \
 139     if (TARGET_E500)                            \
 140       {                                         \
 141         rs6000_spe = 1;                         \
 142         rs6000_spe_abi = 1;                     \
 143         rs6000_float_gprs = 1;                  \
 144       }                                         \
 145                                                 \
 146   if (!g_switch_set)                            \
 147     g_switch_value = SDATA_DEFAULT_SIZE;        \
 148   VXWORKS_OVERRIDE_OPTIONS;                     \
 149   } while (0)
 150
 151 /* No _mcount profiling on VxWorks.  */
 152 #undef FUNCTION_PROFILER
 153 #define FUNCTION_PROFILER(FILE,LABELNO) VXWORKS_FUNCTION_PROFILER(FILE,LABELNO)