sysdeps/x86/dl-hwcap.h

   1 /* x86 version of hardware capability information handling macros.
   2    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _DL_HWCAP_H
  19 #define _DL_HWCAP_H
  20
  21 #if IS_IN (ldconfig)
  22 /* Since ldconfig processes both i386 and x86-64 libraries, it needs
  23    to cover all platforms and hardware capabilities.  */
  24 # define HWCAP_PLATFORMS_START  0
  25 # define HWCAP_PLATFORMS_COUNT  4
  26 # define HWCAP_START            0
  27 # define HWCAP_COUNT            3
  28 # define HWCAP_IMPORTANT \
  29   (HWCAP_X86_SSE2 | HWCAP_X86_64 | HWCAP_X86_AVX512_1)
  30 #elif defined __x86_64__
  31 /* For 64 bit, only cover x86-64 platforms and capabilities.  */
  32 # define HWCAP_PLATFORMS_START  2
  33 # define HWCAP_PLATFORMS_COUNT  4
  34 # define HWCAP_START            1
  35 # define HWCAP_COUNT            3
  36 # define HWCAP_IMPORTANT        (HWCAP_X86_64 | HWCAP_X86_AVX512_1)
  37 #else
  38 /* For 32 bit, only cover i586, i686 and SSE2.  */
  39 # define HWCAP_PLATFORMS_START  0
  40 # define HWCAP_PLATFORMS_COUNT  2
  41 # define HWCAP_START            0
  42 # define HWCAP_COUNT            1
  43 # define HWCAP_IMPORTANT        (HWCAP_X86_SSE2)
  44 #endif
  45
  46 enum
  47 {
  48   HWCAP_X86_SSE2                = 1 << 0,
  49   HWCAP_X86_64                  = 1 << 1,
  50   HWCAP_X86_AVX512_1            = 1 << 2
  51 };
  52
  53 static inline const char *
  54 __attribute__ ((unused))
  55 _dl_hwcap_string (int idx)
  56 {
  57   return GLRO(dl_x86_hwcap_flags)[idx];
  58 };
  59
  60 static inline int
  61 __attribute__ ((unused, always_inline))
  62 _dl_string_hwcap (const char *str)
  63 {
  64   int i;
  65
  66   for (i = HWCAP_START; i < HWCAP_COUNT; i++)
  67     {
  68       if (strcmp (str, GLRO(dl_x86_hwcap_flags)[i]) == 0)
  69         return i;
  70     }
  71   return -1;
  72 };
  73
  74 /* We cannot provide a general printing function.  */
  75 #define _dl_procinfo(type, word) -1
  76
  77 #endif /* dl-hwcap.h */