ports/sysdeps/powerpc/dl-procinfo.h

   1 /* Processor capability information handling macros.  PowerPC version.
   2    Copyright (C) 2005-2012 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library.  If not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _DL_PROCINFO_H
  20 #define _DL_PROCINFO_H 1
  21
  22 #include <ldsodefs.h>
  23 #include <sysdep.h>            /* This defines the PPC_FEATURE_* macros.  */
  24
  25 /* There are 25 bits used, but they are bits 7..31.  */
  26 #define _DL_HWCAP_FIRST                7
  27 #define _DL_HWCAP_COUNT                32
  28
  29 /* These bits influence library search.  */
  30 #define HWCAP_IMPORTANT                (PPC_FEATURE_HAS_ALTIVEC \
  31                                + PPC_FEATURE_HAS_DFP)
  32
  33 #define _DL_PLATFORMS_COUNT    13
  34
  35 #define _DL_FIRST_PLATFORM     32
  36 /* Mask to filter out platforms.  */
  37 #define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
  38                                << _DL_FIRST_PLATFORM)
  39
  40 /* Platform bits (relative to _DL_FIRST_PLATFORM).  */
  41 #define PPC_PLATFORM_POWER4          0
  42 #define PPC_PLATFORM_PPC970          1
  43 #define PPC_PLATFORM_POWER5          2
  44 #define PPC_PLATFORM_POWER5_PLUS      3
  45 #define PPC_PLATFORM_POWER6          4
  46 #define PPC_PLATFORM_CELL_BE         5
  47 #define PPC_PLATFORM_POWER6X         6
  48 #define PPC_PLATFORM_POWER7          7
  49 #define PPC_PLATFORM_PPCA2           8
  50 #define PPC_PLATFORM_PPC405          9
  51 #define PPC_PLATFORM_PPC440          10
  52 #define PPC_PLATFORM_PPC464          11
  53 #define PPC_PLATFORM_PPC476          12
  54
  55 static inline const char *
  56 __attribute__ ((unused))
  57 _dl_hwcap_string (int idx)
  58 {
  59   return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
  60 }
  61
  62 static inline const char *
  63 __attribute__ ((unused))
  64 _dl_platform_string (int idx)
  65 {
  66   return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
  67 }
  68
  69 static inline int
  70 __attribute__ ((unused))
  71 _dl_string_hwcap (const char *str)
  72 {
  73   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
  74     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  75       return i;
  76   return -1;
  77 }
  78
  79 static inline int
  80 __attribute__ ((unused, always_inline))
  81 _dl_string_platform (const char *str)
  82 {
  83   if (str == NULL)
  84     return -1;
  85
  86   if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
  87     {
  88       int ret;
  89       str += 5;
  90       switch (*str)
  91        {
  92        case '4':
  93          ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
  94          break;
  95        case '5':
  96          ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
  97          if (str[1] == '+')
  98            {
  99              ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
 100              ++str;
 101            }
 102          break;
 103        case '6':
 104          ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 105          if (str[1] == 'x')
 106            {
 107              ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 108              ++str;
 109            }
 110          break;
 111        case '7':
 112          ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
 113          break;
 114        default:
 115          return -1;
 116        }
 117       if (str[1] == '\0')
 118        return ret;
 119     }
 120   else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
 121                    3) == 0)
 122     {
 123       if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
 124                           + 3) == 0)
 125        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 126       else if (strcmp (str + 3,
 127                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
 128               == 0)
 129        return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 130       else if (strcmp (str + 3,
 131                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPCA2] + 3)
 132               == 0)
 133        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
 134       else if (strcmp (str + 3,
 135                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC405] + 3)
 136               == 0)
 137        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
 138       else if (strcmp (str + 3,
 139                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC440] + 3)
 140               == 0)
 141        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
 142       else if (strcmp (str + 3,
 143                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC464] + 3)
 144               == 0)
 145        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
 146       else if (strcmp (str + 3,
 147                       GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC476] + 3)
 148               == 0)
 149        return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
 150     }
 151
 152   return -1;
 153 }
 154
 155 #ifdef IS_IN_rtld
 156 static inline int
 157 __attribute__ ((unused))
 158 _dl_procinfo (int word)
 159 {
 160   _dl_printf ("AT_HWCAP:       ");
 161
 162   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
 163     if (word & (1 << i))
 164       _dl_printf (" %s", _dl_hwcap_string (i));
 165
 166   _dl_printf ("\n");
 167
 168   return 0;
 169 }
 170 #endif
 171
 172 #endif /* dl-procinfo.h */