| /* Multiple versions of strncmp. |
| All versions must be listed in ifunc-impl-list.c. |
| Copyright (C) 2017-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* Define multiple versions only for the definition in libc. */ |
| #if IS_IN (libc) |
| # define strncmp __redirect_strncmp |
| # include <string.h> |
| # undef strncmp |
| |
| # define SYMBOL_NAME strncmp |
| # include <init-arch.h> |
| |
| extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; |
| extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden; |
| extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden; |
| |
| static inline void * |
| IFUNC_SELECTOR (void) |
| { |
| const struct cpu_features* cpu_features = __get_cpu_features (); |
| |
| if (CPU_FEATURES_CPU_P (cpu_features, SSE4_2) |
| && !CPU_FEATURES_ARCH_P (cpu_features, Slow_SSE4_2)) |
| return OPTIMIZE (sse42); |
| |
| if (CPU_FEATURES_CPU_P (cpu_features, SSSE3)) |
| return OPTIMIZE (ssse3); |
| |
| return OPTIMIZE (sse2); |
| } |
| |
| libc_ifunc_redirected (__redirect_strncmp, strncmp, IFUNC_SELECTOR ()); |
| |
| # ifdef SHARED |
| __hidden_ver1 (strncmp, __GI_strncmp, __redirect_strncmp) |
| __attribute__ ((visibility ("hidden"))); |
| # endif |
| #endif |
