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     9
  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 #define PPC_PLATFORM_PPCA2              8
  51
  52 static inline const char *
  53 __attribute__ ((unused))
  54 _dl_hwcap_string (int idx)
  55 {
  56   return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
  57 }
  58
  59 static inline const char *
  60 __attribute__ ((unused))
  61 _dl_platform_string (int idx)
  62 {
  63   return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
  64 }
  65
  66 static inline int
  67 __attribute__ ((unused))
  68 _dl_string_hwcap (const char *str)
  69 {
  70   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
  71     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  72       return i;
  73   return -1;
  74 }
  75
  76 static inline int
  77 __attribute__ ((unused, always_inline))
  78 _dl_string_platform (const char *str)
  79 {
  80   if (str == NULL)
  81     return -1;
  82
  83   if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
  84     {
  85       int ret;
  86       str += 5;
  87       switch (*str)
  88         {
  89         case '4':
  90           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
  91           break;
  92         case '5':
  93           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
  94           if (str[1] == '+')
  95             {
  96               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
  97               ++str;
  98             }
  99           break;
 100         case '6':
 101           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 102           if (str[1] == 'x')
 103             {
 104               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 105               ++str;
 106             }
 107           break;
 108         case '7':
 109           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
 110           break;
 111         default:
 112           return -1;
 113         }
 114       if (str[1] == '\0')
 115         return ret;
 116     }
 117   else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
 118                     3) == 0)
 119     {
 120       if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
 121                            + 3) == 0)
 122         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 123       else if (strcmp (str + 3,
 124                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
 125                == 0)
 126         return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 127       else if (strcmp (str + 3,
 128                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPCA2] + 3)
 129                == 0)
 130         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPCA2;
 131     }
 132
 133   return -1;
 134 }
 135
 136 #ifdef IS_IN_rtld
 137 static inline int
 138 __attribute__ ((unused))
 139 _dl_procinfo (int word)
 140 {
 141   _dl_printf ("AT_HWCAP:       ");
 142
 143   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
 144     if (word & (1 << i))
 145       _dl_printf (" %s", _dl_hwcap_string (i));
 146
 147   _dl_printf ("\n");
 148
 149   return 0;
 150 }
 151 #endif
 152
 153 #endif /* dl-procinfo.h */