sysdeps/aarch64/multiarch/ifunc-impl-list.c

   1 /* Enumerate available IFUNC implementations of a function.  AARCH64 version.
   2    Copyright (C) 2017-2021 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <assert.h>
  20 #include <string.h>
  21 #include <wchar.h>
  22 #include <ldsodefs.h>
  23 #include <ifunc-impl-list.h>
  24 #include <init-arch.h>
  25 #include <stdio.h>
  26
  27 /* Maximum number of IFUNC implementations.  */
  28 #define MAX_IFUNC       4
  29
  30 size_t
  31 __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
  32                         size_t max)
  33 {
  34   assert (max >= MAX_IFUNC);
  35
  36   size_t i = 0;
  37
  38   INIT_ARCH ();
  39
  40   /* Support sysdeps/aarch64/multiarch/memcpy.c and memmove.c.  */
  41   IFUNC_IMPL (i, name, memcpy,
  42               IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_thunderx)
  43               IFUNC_IMPL_ADD (array, i, memcpy, !bti, __memcpy_thunderx2)
  44               IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_falkor)
  45               IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_simd)
  46               IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))
  47   IFUNC_IMPL (i, name, memmove,
  48               IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_thunderx)
  49               IFUNC_IMPL_ADD (array, i, memmove, !bti, __memmove_thunderx2)
  50               IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_falkor)
  51               IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_simd)
  52               IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_generic))
  53   IFUNC_IMPL (i, name, memset,
  54               /* Enable this on non-falkor processors too so that other cores
  55                  can do a comparative analysis with __memset_generic.  */
  56               IFUNC_IMPL_ADD (array, i, memset, (zva_size == 64), __memset_falkor)
  57               IFUNC_IMPL_ADD (array, i, memset, (zva_size == 64), __memset_emag)
  58               IFUNC_IMPL_ADD (array, i, memset, 1, __memset_kunpeng)
  59               IFUNC_IMPL_ADD (array, i, memset, 1, __memset_generic))
  60   IFUNC_IMPL (i, name, memchr,
  61               IFUNC_IMPL_ADD (array, i, memchr, !mte, __memchr_nosimd)
  62               IFUNC_IMPL_ADD (array, i, memchr, 1, __memchr_generic))
  63
  64   IFUNC_IMPL (i, name, strlen,
  65               IFUNC_IMPL_ADD (array, i, strlen, !mte, __strlen_asimd)
  66               IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_mte))
  67
  68   return i;
  69 }