sysdeps/s390/multiarch/ifunc-impl-list.c

   1 /* Enumerate available IFUNC implementations of a function. s390/s390x version.
   2    Copyright (C) 2015 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 #include <assert.h>
  20 #include <string.h>
  21 #include <wchar.h>
  22 #include <ifunc-impl-list.h>
  23 #include <ifunc-resolve.h>
  24
  25 /* Maximum number of IFUNC implementations.  */
  26 #define MAX_IFUNC       3
  27
  28 /* Fill ARRAY of MAX elements with IFUNC implementations for function
  29    NAME supported on target machine and return the number of valid
  30    entries.  */
  31 size_t
  32 __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
  33                         size_t max)
  34 {
  35   assert (max >= MAX_IFUNC);
  36
  37   size_t i = 0;
  38
  39   /* Get hardware information.  */
  40   unsigned long int dl_hwcap = GLRO (dl_hwcap);
  41   unsigned long long stfle_bits = 0ULL;
  42   if ((dl_hwcap & HWCAP_S390_STFLE)
  43         && (dl_hwcap & HWCAP_S390_ZARCH)
  44         && (dl_hwcap & HWCAP_S390_HIGH_GPRS))
  45     {
  46       S390_STORE_STFLE (stfle_bits);
  47     }
  48
  49   IFUNC_IMPL (i, name, memset,
  50               IFUNC_IMPL_ADD (array, i, memset,
  51                               S390_IS_Z196 (stfle_bits), __memset_z196)
  52               IFUNC_IMPL_ADD (array, i, memset,
  53                               S390_IS_Z10 (stfle_bits), __memset_z10)
  54               IFUNC_IMPL_ADD (array, i, memset, 1, __memset_default))
  55
  56   IFUNC_IMPL (i, name, memcmp,
  57               IFUNC_IMPL_ADD (array, i, memcmp,
  58                               S390_IS_Z196 (stfle_bits), __memcmp_z196)
  59               IFUNC_IMPL_ADD (array, i, memcmp,
  60                               S390_IS_Z10 (stfle_bits), __memcmp_z10)
  61               IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_default))
  62
  63 #ifdef SHARED
  64
  65   IFUNC_IMPL (i, name, memcpy,
  66               IFUNC_IMPL_ADD (array, i, memcpy,
  67                               S390_IS_Z196 (stfle_bits), __memcpy_z196)
  68               IFUNC_IMPL_ADD (array, i, memcpy,
  69                               S390_IS_Z10 (stfle_bits), __memcpy_z10)
  70               IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_default))
  71
  72 #endif /* SHARED */
  73
  74 #ifdef HAVE_S390_VX_ASM_SUPPORT
  75
  76 # define IFUNC_VX_IMPL(FUNC)                                            \
  77   IFUNC_IMPL (i, name, FUNC,                                            \
  78               IFUNC_IMPL_ADD (array, i, FUNC, dl_hwcap & HWCAP_S390_VX, \
  79                               __##FUNC##_vx)                            \
  80               IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
  81
  82   IFUNC_VX_IMPL (strlen);
  83   IFUNC_VX_IMPL (wcslen);
  84
  85   IFUNC_VX_IMPL (strnlen);
  86   IFUNC_VX_IMPL (wcsnlen);
  87
  88   IFUNC_VX_IMPL (strcpy);
  89   IFUNC_VX_IMPL (wcscpy);
  90
  91   IFUNC_VX_IMPL (stpcpy);
  92   IFUNC_VX_IMPL (wcpcpy);
  93
  94   IFUNC_VX_IMPL (strncpy);
  95   IFUNC_VX_IMPL (wcsncpy);
  96
  97   IFUNC_VX_IMPL (stpncpy);
  98   IFUNC_VX_IMPL (wcpncpy);
  99
 100   IFUNC_VX_IMPL (strcat);
 101   IFUNC_VX_IMPL (wcscat);
 102
 103   IFUNC_VX_IMPL (strncat);
 104   IFUNC_VX_IMPL (wcsncat);
 105
 106   IFUNC_VX_IMPL (strcmp);
 107   IFUNC_VX_IMPL (wcscmp);
 108
 109   IFUNC_VX_IMPL (strncmp);
 110   IFUNC_VX_IMPL (wcsncmp);
 111
 112   IFUNC_VX_IMPL (strchr);
 113   IFUNC_VX_IMPL (wcschr);
 114
 115   IFUNC_VX_IMPL (strchrnul);
 116   IFUNC_VX_IMPL (wcschrnul);
 117
 118   IFUNC_VX_IMPL (strrchr);
 119   IFUNC_VX_IMPL (wcsrchr);
 120
 121   IFUNC_VX_IMPL (strspn);
 122   IFUNC_VX_IMPL (wcsspn);
 123
 124   IFUNC_VX_IMPL (strpbrk);
 125   IFUNC_VX_IMPL (wcspbrk);
 126
 127   IFUNC_VX_IMPL (strcspn);
 128   IFUNC_VX_IMPL (wcscspn);
 129
 130   IFUNC_VX_IMPL (memchr);
 131   IFUNC_VX_IMPL (wmemchr);
 132   IFUNC_VX_IMPL (rawmemchr);
 133
 134   IFUNC_VX_IMPL (memccpy);
 135
 136   IFUNC_VX_IMPL (wmemset);
 137 #endif /* HAVE_S390_VX_ASM_SUPPORT */
 138
 139   return i;
 140 }