sysdeps/powerpc/dl-procinfo.h

   1 /* Processor capability information handling macros.  PowerPC version.
   2    Copyright (C) 2005, 2006 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _DL_PROCINFO_H
  21 #define _DL_PROCINFO_H  1
  22
  23 #include <ldsodefs.h>
  24 #include <sysdep.h>             /* This defines the PPC_FEATURE_* macros.  */
  25
  26 /* There are 25 bits used, but they are bits 7..31.  */
  27 #define _DL_HWCAP_FIRST         7
  28 #define _DL_HWCAP_COUNT         32
  29
  30 /* These bits influence library search.  */
  31 #define HWCAP_IMPORTANT         (PPC_FEATURE_HAS_ALTIVEC \
  32                                 + PPC_FEATURE_HAS_DFP)
  33
  34 #define _DL_PLATFORMS_COUNT     8
  35
  36 #define _DL_FIRST_PLATFORM      32
  37 /* Mask to filter out platforms.  */
  38 #define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
  39                                  << _DL_FIRST_PLATFORM)
  40
  41 /* Platform bits (relative to _DL_FIRST_PLATFORM).  */
  42 #define PPC_PLATFORM_POWER4             0
  43 #define PPC_PLATFORM_PPC970             1
  44 #define PPC_PLATFORM_POWER5             2
  45 #define PPC_PLATFORM_POWER5_PLUS        3
  46 #define PPC_PLATFORM_POWER6             4
  47 #define PPC_PLATFORM_CELL_BE            5
  48 #define PPC_PLATFORM_POWER6X            6
  49 #define PPC_PLATFORM_POWER7             7
  50
  51 static inline const char *
  52 __attribute__ ((unused))
  53 _dl_hwcap_string (int idx)
  54 {
  55   return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
  56 }
  57
  58 static inline const char *
  59 __attribute__ ((unused))
  60 _dl_platform_string (int idx)
  61 {
  62   return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
  63 }
  64
  65 static inline int
  66 __attribute__ ((unused))
  67 _dl_string_hwcap (const char *str)
  68 {
  69   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
  70     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  71       return i;
  72   return -1;
  73 }
  74
  75 static inline int
  76 __attribute__ ((unused, always_inline))
  77 _dl_string_platform (const char *str)
  78 {
  79   if (str == NULL)
  80     return -1;
  81
  82   if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
  83     {
  84       int ret;
  85       str += 5;
  86       switch (*str)
  87         {
  88         case '4':
  89           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
  90           break;
  91         case '5':
  92           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
  93           if (str[1] == '+')
  94             {
  95               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
  96               ++str;
  97             }
  98           break;
  99         case '6':
 100           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 101           if (str[1] == 'x')
 102             {
 103               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 104               ++str;
 105             }
 106           break;
 107         case '7':
 108           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
 109           break;
 110         default:
 111           return -1;
 112         }
 113       if (str[1] == '\0')
 114         return ret;
 115     }
 116   else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
 117                     3) == 0)
 118     {
 119       if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
 120                            + 3) == 0)
 121         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 122       else if (strcmp (str + 3,
 123                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
 124                == 0)
 125         return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 126     }
 127
 128   return -1;
 129 }
 130
 131 #ifdef IS_IN_rtld
 132 static inline int
 133 __attribute__ ((unused))
 134 _dl_procinfo (int word)
 135 {
 136   _dl_printf ("AT_HWCAP:       ");
 137
 138   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
 139     if (word & (1 << i))
 140       _dl_printf (" %s", _dl_hwcap_string (i));
 141
 142   _dl_printf ("\n");
 143
 144   return 0;
 145 }
 146 #endif
 147
 148 #endif /* dl-procinfo.h */