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 20 bits used, but they are bits 12..31.  */
  27 #define _DL_HWCAP_FIRST         9
  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     7
  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
  50 static inline const char *
  51 __attribute__ ((unused))
  52 _dl_hwcap_string (int idx)
  53 {
  54   return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
  55 }
  56
  57 static inline const char *
  58 __attribute__ ((unused))
  59 _dl_platform_string (int idx)
  60 {
  61   return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
  62 }
  63
  64 static inline int
  65 __attribute__ ((unused))
  66 _dl_string_hwcap (const char *str)
  67 {
  68   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
  69     if (strcmp (str, _dl_hwcap_string (i)) == 0)
  70       return i;
  71   return -1;
  72 }
  73
  74 static inline int
  75 __attribute__ ((unused, always_inline))
  76 _dl_string_platform (const char *str)
  77 {
  78   if (str == NULL)
  79     return -1;
  80
  81   if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
  82     {
  83       int ret;
  84       str += 5;
  85       switch (*str)
  86         {
  87         case '4':
  88           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
  89           break;
  90         case '5':
  91           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
  92           if (str[1] == '+')
  93             {
  94               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
  95               ++str;
  96             }
  97           break;
  98         case '6':
  99           ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
 100           if (str[1] == 'x')
 101             {
 102               ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
 103               ++str;
 104             }
 105           break;
 106         default:
 107           return -1;
 108         }
 109       if (str[1] == '\0')
 110         return ret;
 111     }
 112   else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
 113                     3) == 0)
 114     {
 115       if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
 116                            + 3) == 0)
 117         return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
 118       else if (strcmp (str + 3,
 119                        GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
 120                == 0)
 121         return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
 122     }
 123
 124   return -1;
 125 }
 126
 127 #ifdef IS_IN_rtld
 128 static inline int
 129 __attribute__ ((unused))
 130 _dl_procinfo (int word)
 131 {
 132   _dl_printf ("AT_HWCAP:       ");
 133
 134   for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
 135     if (word & (1 << i))
 136       _dl_printf (" %s", _dl_hwcap_string (i));
 137
 138   _dl_printf ("\n");
 139
 140   return 0;
 141 }
 142 #endif
 143
 144 #endif /* dl-procinfo.h */