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x86-64: Implement strcmp family IFUNC selectors in C
Implement strcmp family IFUNC selectors in C. All internal calls within libc.so can use IFUNC on x86-64 since unlike x86, x86-64 supports PC-relative addressing to access the GOT entry so that it can call via PLT without using an extra register. For libc.a, we can't use IFUNC for functions which are called before IFUNC has been initialized. Use IFUNC internally reduces the icache footprint since libc.so and other codes in the process use the same implementations. This patch uses IFUNC for strcmp family functions within libc. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strcmp-sse2, strcmp-sse4_2, strncmp-sse2, strncmp-sse4_2, strcasecmp_l-sse2, strcasecmp_l-sse4_2, strcasecmp_l-avx, strncase_l-sse2, strncase_l-sse4_2 and strncase_l-avx. * sysdeps/x86_64/multiarch/ifunc-strcasecmp.h: New file. * sysdeps/x86_64/multiarch/strcasecmp.c: Likewise. * sysdeps/x86_64/multiarch/strcasecmp_l-avx.S: Likewise. * sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S: Likewise. * sysdeps/x86_64/multiarch/strcasecmp_l.c: Likewise. * sysdeps/x86_64/multiarch/strcmp-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strcmp-sse4_2.S: Likewise. * sysdeps/x86_64/multiarch/strcmp.c: Likewise. * sysdeps/x86_64/multiarch/strncase.c: Likewise. * sysdeps/x86_64/multiarch/strncase_l-avx.S : Likewise. * sysdeps/x86_64/multiarch/strncase_l-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strncase_l-sse4_2.S: Likewise. * sysdeps/x86_64/multiarch/strncase_l.c: Likewise. * sysdeps/x86_64/multiarch/strncmp-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strncmp-sse4_2.S: Likewise. * sysdeps/x86_64/multiarch/strncmp.c: Likewise. * sysdeps/x86_64/multiarch/strcasecmp_l.S: Removed. * sysdeps/x86_64/multiarch/strcmp.S: Likewise. * sysdeps/x86_64/multiarch/strncase_l.S: Likewise. * sysdeps/x86_64/multiarch/strncmp.S: Likewise. * sysdeps/x86_64/multiarch/strcmp-sse42.S: Include <sysdep.h>. (STRCMP_SSE42): New. Defined to __strcmp_sse42 if not defined. [USE_AS_STRCASECMP_L || USE_AS_STRNCASECMP_L]: Include "locale-defines.h". (UPDATE_STRNCMP_COUNTER): New. (SECTION): Likewise. (GLABEL): Likewise. (LABEL): Likewise. * sysdeps/x86_64/multiarch/strncmp-ssse3.S: Rewrite and enable for libc.a.
This commit is contained in:
H.J. Lu
parent
9649350d2e
commit
11ffcacb64
38
ChangeLog
38
ChangeLog
@ -1,3 +1,41 @@
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2017-06-21 H.J. Lu <hongjiu.lu@intel.com>
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* sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add
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strcmp-sse2, strcmp-sse4_2, strncmp-sse2, strncmp-sse4_2,
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strcasecmp_l-sse2, strcasecmp_l-sse4_2, strcasecmp_l-avx,
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strncase_l-sse2, strncase_l-sse4_2 and strncase_l-avx.
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* sysdeps/x86_64/multiarch/ifunc-strcasecmp.h: New file.
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* sysdeps/x86_64/multiarch/strcasecmp.c: Likewise.
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* sysdeps/x86_64/multiarch/strcasecmp_l-avx.S: Likewise.
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* sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S: Likewise.
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* sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S: Likewise.
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* sysdeps/x86_64/multiarch/strcasecmp_l.c: Likewise.
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* sysdeps/x86_64/multiarch/strcmp-sse2.S: Likewise.
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* sysdeps/x86_64/multiarch/strcmp-sse4_2.S: Likewise.
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* sysdeps/x86_64/multiarch/strcmp.c: Likewise.
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* sysdeps/x86_64/multiarch/strncase.c: Likewise.
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* sysdeps/x86_64/multiarch/strncase_l-avx.S : Likewise.
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* sysdeps/x86_64/multiarch/strncase_l-sse2.S: Likewise.
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* sysdeps/x86_64/multiarch/strncase_l-sse4_2.S: Likewise.
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* sysdeps/x86_64/multiarch/strncase_l.c: Likewise.
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* sysdeps/x86_64/multiarch/strncmp-sse2.S: Likewise.
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* sysdeps/x86_64/multiarch/strncmp-sse4_2.S: Likewise.
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* sysdeps/x86_64/multiarch/strncmp.c: Likewise.
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* sysdeps/x86_64/multiarch/strcasecmp_l.S: Removed.
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* sysdeps/x86_64/multiarch/strcmp.S: Likewise.
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* sysdeps/x86_64/multiarch/strncase_l.S: Likewise.
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* sysdeps/x86_64/multiarch/strncmp.S: Likewise.
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* sysdeps/x86_64/multiarch/strcmp-sse42.S: Include <sysdep.h>.
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(STRCMP_SSE42): New. Defined to __strcmp_sse42 if not defined.
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[USE_AS_STRCASECMP_L || USE_AS_STRNCASECMP_L]: Include
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"locale-defines.h".
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(UPDATE_STRNCMP_COUNTER): New.
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(SECTION): Likewise.
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(GLABEL): Likewise.
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(LABEL): Likewise.
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* sysdeps/x86_64/multiarch/strncmp-ssse3.S: Rewrite and enable
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for libc.a.
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2017-06-21 Joseph Myers <joseph@codesourcery.com>
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[BZ #21622]
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@ -4,8 +4,10 @@ endif
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ifeq ($(subdir),string)
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sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \
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strcmp-sse2-unaligned strncmp-ssse3 \
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sysdep_routines += strncat-c stpncpy-c strncpy-c \
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strcmp-sse2 strcmp-sse2-unaligned strcmp-ssse3 \
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strcmp-sse4_2 \
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strncmp-sse2 strncmp-ssse3 strncmp-sse4_2 \
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memchr-sse2 rawmemchr-sse2 memchr-avx2 rawmemchr-avx2 \
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memrchr-sse2 memrchr-avx2 \
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memcmp-sse2 \
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@ -14,11 +16,15 @@ sysdep_routines += strncat-c stpncpy-c strncpy-c strcmp-ssse3 \
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memmove-ssse3 \
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memcpy-ssse3-back \
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memmove-ssse3-back \
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memmove-avx512-no-vzeroupper strcasecmp_l-ssse3 \
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memmove-avx512-no-vzeroupper \
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strcasecmp_l-sse2 strcasecmp_l-ssse3 \
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strcasecmp_l-sse4_2 strcasecmp_l-avx \
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strncase_l-sse2 strncase_l-ssse3 \
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strncase_l-sse4_2 strncase_l-avx \
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strchr-sse2 strchrnul-sse2 strchr-avx2 strchrnul-avx2 \
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strrchr-sse2 strrchr-avx2 \
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strlen-sse2 strnlen-sse2 strlen-avx2 strnlen-avx2 \
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strncase_l-ssse3 strcat-ssse3 strncat-ssse3\
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strcat-ssse3 strncat-ssse3\
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strcpy-sse2 stpcpy-sse2 \
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strcpy-ssse3 strncpy-ssse3 stpcpy-ssse3 stpncpy-ssse3 \
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strcpy-sse2-unaligned strncpy-sse2-unaligned \
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43
sysdeps/x86_64/multiarch/ifunc-strcasecmp.h
Normal file
43
sysdeps/x86_64/multiarch/ifunc-strcasecmp.h
Normal file
@ -0,0 +1,43 @@
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/* Common definition for strcasecmp famly ifunc selections.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <init-arch.h>
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extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx) attribute_hidden;
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static inline void *
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IFUNC_SELECTOR (void)
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{
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const struct cpu_features* cpu_features = __get_cpu_features ();
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if (CPU_FEATURES_ARCH_P (cpu_features, AVX_Usable))
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return OPTIMIZE (avx);
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if (CPU_FEATURES_CPU_P (cpu_features, SSE4_2)
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&& !CPU_FEATURES_ARCH_P (cpu_features, Slow_SSE4_2))
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return OPTIMIZE (sse42);
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if (CPU_FEATURES_CPU_P (cpu_features, SSSE3))
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return OPTIMIZE (ssse3);
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return OPTIMIZE (sse2);
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}
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39
sysdeps/x86_64/multiarch/strcasecmp.c
Normal file
39
sysdeps/x86_64/multiarch/strcasecmp.c
Normal file
@ -0,0 +1,39 @@
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/* Multiple versions of strcasecmp.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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# define strcasecmp __redirect_strcasecmp
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# define __strcasecmp __redirect___strcasecmp
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# include <string.h>
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# undef strcasecmp
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# undef __strcasecmp
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# define SYMBOL_NAME strcasecmp
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# include "ifunc-strcasecmp.h"
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libc_ifunc_redirected (__redirect_strcasecmp, __strcasecmp,
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IFUNC_SELECTOR ());
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weak_alias (__strcasecmp, strcasecmp)
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# ifdef SHARED
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__hidden_ver1 (__strcasecmp, __GI___strcasecmp, __redirect___strcasecmp)
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__attribute__ ((visibility ("hidden")));
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# endif
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#endif
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22
sysdeps/x86_64/multiarch/strcasecmp_l-avx.S
Normal file
22
sysdeps/x86_64/multiarch/strcasecmp_l-avx.S
Normal file
@ -0,0 +1,22 @@
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/* strcasecmp_l optimized with AVX.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define STRCMP_SSE42 __strcasecmp_l_avx
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#define USE_AVX 1
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#define USE_AS_STRCASECMP_L
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#include "strcmp-sse42.S"
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23
sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S
Normal file
23
sysdeps/x86_64/multiarch/strcasecmp_l-sse2.S
Normal file
@ -0,0 +1,23 @@
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/* strcasecmp_l optimized with SSE2.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define STRCMP __strcasecmp_l_sse2
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#define USE_AS_STRCASECMP_L
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#define NO_NOLOCALE_ALIAS
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#define __strcasecmp __strcasecmp_sse2
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#include <sysdeps/x86_64/strcmp.S>
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21
sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S
Normal file
21
sysdeps/x86_64/multiarch/strcasecmp_l-sse4_2.S
Normal file
@ -0,0 +1,21 @@
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/* strcasecmp_l optimized with SSE4.2.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define STRCMP_SSE42 __strcasecmp_l_sse42
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#define USE_AS_STRCASECMP_L
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#include "strcmp-sse42.S"
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@ -1,8 +0,0 @@
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/* Multiple versions of strcasecmp and strcasecmp_l
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All versions must be listed in ifunc-impl-list.c. */
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#define STRCMP __strcasecmp_l
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#define USE_AS_STRCASECMP_L
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#include "strcmp.S"
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weak_alias (__strcasecmp_l, strcasecmp_l)
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libc_hidden_def (strcasecmp_l)
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40
sysdeps/x86_64/multiarch/strcasecmp_l.c
Normal file
40
sysdeps/x86_64/multiarch/strcasecmp_l.c
Normal file
@ -0,0 +1,40 @@
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/* Multiple versions of strcasecmp_l.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
|
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version 2.1 of the License, or (at your option) any later version.
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|
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
|
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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# define strcasecmp_l __redirect_strcasecmp_l
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# define __strcasecmp_l __redirect___strcasecmp_l
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# include <string.h>
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# undef strcasecmp_l
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# undef __strcasecmp_l
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# define SYMBOL_NAME strcasecmp_l
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# include "ifunc-strcasecmp.h"
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libc_ifunc_redirected (__redirect_strcasecmp_l, __strcasecmp_l,
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IFUNC_SELECTOR ());
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weak_alias (__strcasecmp_l, strcasecmp_l)
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# ifdef SHARED
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__hidden_ver1 (__strcasecmp_l, __GI___strcasecmp_l,
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__redirect___strcasecmp_l)
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__attribute__ ((visibility ("hidden")));
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# endif
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#endif
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28
sysdeps/x86_64/multiarch/strcmp-sse2.S
Normal file
28
sysdeps/x86_64/multiarch/strcmp-sse2.S
Normal file
@ -0,0 +1,28 @@
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/* strcmp optimized with SSE2.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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|
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The GNU C Library is free software; you can redistribute it and/or
|
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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.
|
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|
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The GNU C Library is distributed in the hope that it will be useful,
|
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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Lesser General Public License for more details.
|
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|
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You should have received a copy of the GNU Lesser General Public
|
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License along with the GNU C Library; if not, see
|
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<http://www.gnu.org/licenses/>. */
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#if IS_IN (libc)
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# include <sysdep.h>
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# define STRCMP __strcmp_sse2
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# undef libc_hidden_builtin_def
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# define libc_hidden_builtin_def(strcmp)
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#endif
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#include <sysdeps/x86_64/strcmp.S>
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@ -17,6 +17,40 @@
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#ifndef STRCMP_SSE42
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# define STRCMP_SSE42 __strcmp_sse42
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#endif
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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# include "locale-defines.h"
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#endif
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#if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
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/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
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if the new counter > the old one or is 0. */
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# define UPDATE_STRNCMP_COUNTER \
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/* calculate left number to compare */ \
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lea -16(%rcx, %r11), %r9; \
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cmp %r9, %r11; \
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jb LABEL(strcmp_exitz); \
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test %r9, %r9; \
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je LABEL(strcmp_exitz); \
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mov %r9, %r11
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#else
|
||||
# define UPDATE_STRNCMP_COUNTER
|
||||
#endif
|
||||
|
||||
#ifdef USE_AVX
|
||||
# define SECTION avx
|
||||
# define GLABEL(l) l##_avx
|
||||
#else
|
||||
# define SECTION sse4.2
|
||||
# define GLABEL(l) l##_sse42
|
||||
#endif
|
||||
|
||||
#define LABEL(l) .L##l
|
||||
|
||||
/* We use 0x1a:
|
||||
_SIDD_SBYTE_OPS
|
||||
|
||||
21
sysdeps/x86_64/multiarch/strcmp-sse4_2.S
Normal file
21
sysdeps/x86_64/multiarch/strcmp-sse4_2.S
Normal file
@ -0,0 +1,21 @@
|
||||
/* strcmp optimized with SSE4.2.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
#if IS_IN (libc)
|
||||
# include "strcmp-sse42.S"
|
||||
#endif
|
||||
@ -1,209 +0,0 @@
|
||||
/* Multiple versions of strcmp
|
||||
Copyright (C) 2009-2017 Free Software Foundation, Inc.
|
||||
Contributed by Intel Corporation.
|
||||
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/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
#include <init-arch.h>
|
||||
|
||||
#ifdef USE_AS_STRNCMP
|
||||
/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
|
||||
if the new counter > the old one or is 0. */
|
||||
# define UPDATE_STRNCMP_COUNTER \
|
||||
/* calculate left number to compare */ \
|
||||
lea -16(%rcx, %r11), %r9; \
|
||||
cmp %r9, %r11; \
|
||||
jb LABEL(strcmp_exitz); \
|
||||
test %r9, %r9; \
|
||||
je LABEL(strcmp_exitz); \
|
||||
mov %r9, %r11
|
||||
|
||||
# define STRCMP_SSE42 __strncmp_sse42
|
||||
# define STRCMP_SSSE3 __strncmp_ssse3
|
||||
# define STRCMP_SSE2 __strncmp_sse2
|
||||
# define __GI_STRCMP __GI_strncmp
|
||||
#elif defined USE_AS_STRCASECMP_L
|
||||
# include "locale-defines.h"
|
||||
|
||||
# define UPDATE_STRNCMP_COUNTER
|
||||
|
||||
# define STRCMP_AVX __strcasecmp_l_avx
|
||||
# define STRCMP_SSE42 __strcasecmp_l_sse42
|
||||
# define STRCMP_SSSE3 __strcasecmp_l_ssse3
|
||||
# define STRCMP_SSE2 __strcasecmp_l_sse2
|
||||
# define __GI_STRCMP __GI___strcasecmp_l
|
||||
#elif defined USE_AS_STRNCASECMP_L
|
||||
# include "locale-defines.h"
|
||||
|
||||
/* Since the counter, %r11, is unsigned, we branch to strcmp_exitz
|
||||
if the new counter > the old one or is 0. */
|
||||
# define UPDATE_STRNCMP_COUNTER \
|
||||
/* calculate left number to compare */ \
|
||||
lea -16(%rcx, %r11), %r9; \
|
||||
cmp %r9, %r11; \
|
||||
jb LABEL(strcmp_exitz); \
|
||||
test %r9, %r9; \
|
||||
je LABEL(strcmp_exitz); \
|
||||
mov %r9, %r11
|
||||
|
||||
# define STRCMP_AVX __strncasecmp_l_avx
|
||||
# define STRCMP_SSE42 __strncasecmp_l_sse42
|
||||
# define STRCMP_SSSE3 __strncasecmp_l_ssse3
|
||||
# define STRCMP_SSE2 __strncasecmp_l_sse2
|
||||
# define __GI_STRCMP __GI___strncasecmp_l
|
||||
#else
|
||||
# define USE_AS_STRCMP
|
||||
# define UPDATE_STRNCMP_COUNTER
|
||||
# ifndef STRCMP
|
||||
# define STRCMP strcmp
|
||||
# define STRCMP_SSE42 __strcmp_sse42
|
||||
# define STRCMP_SSSE3 __strcmp_ssse3
|
||||
# define STRCMP_SSE2 __strcmp_sse2
|
||||
# define __GI_STRCMP __GI_strcmp
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* Define multiple versions only for the definition in libc. Don't
|
||||
define multiple versions for strncmp in static library since we
|
||||
need strncmp before the initialization happened. */
|
||||
#if (defined SHARED || !defined USE_AS_STRNCMP) && IS_IN (libc)
|
||||
.text
|
||||
ENTRY(STRCMP)
|
||||
.type STRCMP, @gnu_indirect_function
|
||||
LOAD_RTLD_GLOBAL_RO_RDX
|
||||
#ifdef USE_AS_STRCMP
|
||||
leaq __strcmp_sse2_unaligned(%rip), %rax
|
||||
HAS_ARCH_FEATURE (Fast_Unaligned_Load)
|
||||
jnz 3f
|
||||
#else
|
||||
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
||||
jnz 2f
|
||||
leaq STRCMP_SSE42(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSE4_2)
|
||||
jnz 3f
|
||||
#endif
|
||||
2: leaq STRCMP_SSSE3(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSSE3)
|
||||
jnz 3f
|
||||
leaq STRCMP_SSE2(%rip), %rax
|
||||
3: ret
|
||||
END(STRCMP)
|
||||
|
||||
# ifdef USE_AS_STRCASECMP_L
|
||||
ENTRY(__strcasecmp)
|
||||
.type __strcasecmp, @gnu_indirect_function
|
||||
LOAD_RTLD_GLOBAL_RO_RDX
|
||||
leaq __strcasecmp_avx(%rip), %rax
|
||||
HAS_ARCH_FEATURE (AVX_Usable)
|
||||
jnz 3f
|
||||
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
||||
jnz 2f
|
||||
leaq __strcasecmp_sse42(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSE4_2)
|
||||
jnz 3f
|
||||
2: leaq __strcasecmp_ssse3(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSSE3)
|
||||
jnz 3f
|
||||
leaq __strcasecmp_sse2(%rip), %rax
|
||||
3: ret
|
||||
END(__strcasecmp)
|
||||
weak_alias (__strcasecmp, strcasecmp)
|
||||
# endif
|
||||
# ifdef USE_AS_STRNCASECMP_L
|
||||
ENTRY(__strncasecmp)
|
||||
.type __strncasecmp, @gnu_indirect_function
|
||||
LOAD_RTLD_GLOBAL_RO_RDX
|
||||
leaq __strncasecmp_avx(%rip), %rax
|
||||
HAS_ARCH_FEATURE (AVX_Usable)
|
||||
jnz 3f
|
||||
HAS_ARCH_FEATURE (Slow_SSE4_2)
|
||||
jnz 2f
|
||||
leaq __strncasecmp_sse42(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSE4_2)
|
||||
jnz 3f
|
||||
2: leaq __strncasecmp_ssse3(%rip), %rax
|
||||
HAS_CPU_FEATURE (SSSE3)
|
||||
jnz 3f
|
||||
leaq __strncasecmp_sse2(%rip), %rax
|
||||
3: ret
|
||||
END(__strncasecmp)
|
||||
weak_alias (__strncasecmp, strncasecmp)
|
||||
# endif
|
||||
|
||||
# undef LABEL
|
||||
# define LABEL(l) .L##l##_sse42
|
||||
# define GLABEL(l) l##_sse42
|
||||
# define SECTION sse4.2
|
||||
# include "strcmp-sse42.S"
|
||||
|
||||
|
||||
# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
|
||||
# define LABEL(l) .L##l##_avx
|
||||
# define GLABEL(l) l##_avx
|
||||
# define USE_AVX 1
|
||||
# undef STRCMP_SSE42
|
||||
# define STRCMP_SSE42 STRCMP_AVX
|
||||
# define SECTION avx
|
||||
# include "strcmp-sse42.S"
|
||||
# endif
|
||||
|
||||
|
||||
# undef ENTRY
|
||||
# define ENTRY(name) \
|
||||
.type STRCMP_SSE2, @function; \
|
||||
.align 16; \
|
||||
.globl STRCMP_SSE2; \
|
||||
.hidden STRCMP_SSE2; \
|
||||
STRCMP_SSE2: cfi_startproc; \
|
||||
CALL_MCOUNT
|
||||
# undef END
|
||||
# define END(name) \
|
||||
cfi_endproc; .size STRCMP_SSE2, .-STRCMP_SSE2
|
||||
|
||||
# ifdef USE_AS_STRCASECMP_L
|
||||
# define ENTRY2(name) \
|
||||
.type __strcasecmp_sse2, @function; \
|
||||
.align 16; \
|
||||
.globl __strcasecmp_sse2; \
|
||||
.hidden __strcasecmp_sse2; \
|
||||
__strcasecmp_sse2: cfi_startproc; \
|
||||
CALL_MCOUNT
|
||||
# define END2(name) \
|
||||
cfi_endproc; .size __strcasecmp_sse2, .-__strcasecmp_sse2
|
||||
# endif
|
||||
|
||||
# ifdef USE_AS_STRNCASECMP_L
|
||||
# define ENTRY2(name) \
|
||||
.type __strncasecmp_sse2, @function; \
|
||||
.align 16; \
|
||||
.globl __strncasecmp_sse2; \
|
||||
.hidden __strncasecmp_sse2; \
|
||||
__strncasecmp_sse2: cfi_startproc; \
|
||||
CALL_MCOUNT
|
||||
# define END2(name) \
|
||||
cfi_endproc; .size __strncasecmp_sse2, .-__strncasecmp_sse2
|
||||
# endif
|
||||
|
||||
# undef libc_hidden_builtin_def
|
||||
/* It doesn't make sense to send libc-internal strcmp calls through a PLT.
|
||||
The speedup we get from using SSE4.2 instruction is likely eaten away
|
||||
by the indirect call in the PLT. */
|
||||
# define libc_hidden_builtin_def(name) \
|
||||
.globl __GI_STRCMP; __GI_STRCMP = STRCMP_SSE2
|
||||
#endif
|
||||
|
||||
#include "../strcmp.S"
|
||||
53
sysdeps/x86_64/multiarch/strcmp.c
Normal file
53
sysdeps/x86_64/multiarch/strcmp.c
Normal file
@ -0,0 +1,53 @@
|
||||
/* Multiple versions of strcmp.
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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 strcmp __redirect_strcmp
|
||||
# include <string.h>
|
||||
# undef strcmp
|
||||
|
||||
# define SYMBOL_NAME strcmp
|
||||
# include <init-arch.h>
|
||||
|
||||
extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
|
||||
extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) attribute_hidden;
|
||||
extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
|
||||
|
||||
static inline void *
|
||||
IFUNC_SELECTOR (void)
|
||||
{
|
||||
const struct cpu_features* cpu_features = __get_cpu_features ();
|
||||
|
||||
if (CPU_FEATURES_ARCH_P (cpu_features, Fast_Unaligned_Load))
|
||||
return OPTIMIZE (sse2_unaligned);
|
||||
|
||||
if (CPU_FEATURES_CPU_P (cpu_features, SSSE3))
|
||||
return OPTIMIZE (ssse3);
|
||||
|
||||
return OPTIMIZE (sse2);
|
||||
}
|
||||
|
||||
libc_ifunc_redirected (__redirect_strcmp, strcmp, IFUNC_SELECTOR ());
|
||||
|
||||
# ifdef SHARED
|
||||
__hidden_ver1 (strcmp, __GI_strcmp, __redirect_strcmp)
|
||||
__attribute__ ((visibility ("hidden")));
|
||||
# endif
|
||||
#endif
|
||||
35
sysdeps/x86_64/multiarch/strncase.c
Normal file
35
sysdeps/x86_64/multiarch/strncase.c
Normal file
@ -0,0 +1,35 @@
|
||||
/* Multiple versions of strncasecmp.
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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 strncasecmp __redirect_strncasecmp
|
||||
# define __strncasecmp __redirect___strncasecmp
|
||||
# include <string.h>
|
||||
# undef strncasecmp
|
||||
# undef __strncasecmp
|
||||
|
||||
# define SYMBOL_NAME strncasecmp
|
||||
# include "ifunc-strcasecmp.h"
|
||||
|
||||
libc_ifunc_redirected (__redirect_strncasecmp, __strncasecmp,
|
||||
IFUNC_SELECTOR ());
|
||||
|
||||
weak_alias (__strncasecmp, strncasecmp)
|
||||
#endif
|
||||
22
sysdeps/x86_64/multiarch/strncase_l-avx.S
Normal file
22
sysdeps/x86_64/multiarch/strncase_l-avx.S
Normal file
@ -0,0 +1,22 @@
|
||||
/* strncasecmp_l optimized with AVX.
|
||||
Copyright (C) 2017 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 STRCMP_SSE42 __strncasecmp_l_avx
|
||||
#define USE_AVX 1
|
||||
#define USE_AS_STRNCASECMP_L
|
||||
#include "strcmp-sse42.S"
|
||||
23
sysdeps/x86_64/multiarch/strncase_l-sse2.S
Normal file
23
sysdeps/x86_64/multiarch/strncase_l-sse2.S
Normal file
@ -0,0 +1,23 @@
|
||||
/* strncasecmp_l optimized with SSE2.
|
||||
Copyright (C) 2017 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 STRCMP __strncasecmp_l_sse2
|
||||
#define NO_NOLOCALE_ALIAS
|
||||
#define USE_AS_STRNCASECMP_L
|
||||
#define __strncasecmp __strncasecmp_sse2
|
||||
#include <sysdeps/x86_64/strcmp.S>
|
||||
21
sysdeps/x86_64/multiarch/strncase_l-sse4_2.S
Normal file
21
sysdeps/x86_64/multiarch/strncase_l-sse4_2.S
Normal file
@ -0,0 +1,21 @@
|
||||
/* strncasecmp_l optimized with SSE4.2.
|
||||
Copyright (C) 2017 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 STRCMP_SSE42 __strncasecmp_l_sse42
|
||||
#define USE_AS_STRNCASECMP_L
|
||||
#include "strcmp-sse42.S"
|
||||
@ -1,8 +0,0 @@
|
||||
/* Multiple versions of strncasecmp and strncasecmp_l
|
||||
All versions must be listed in ifunc-impl-list.c. */
|
||||
#define STRCMP __strncasecmp_l
|
||||
#define USE_AS_STRNCASECMP_L
|
||||
#include "strcmp.S"
|
||||
|
||||
weak_alias (__strncasecmp_l, strncasecmp_l)
|
||||
libc_hidden_def (strncasecmp_l)
|
||||
40
sysdeps/x86_64/multiarch/strncase_l.c
Normal file
40
sysdeps/x86_64/multiarch/strncase_l.c
Normal file
@ -0,0 +1,40 @@
|
||||
/* Multiple versions of strncasecmp_l.
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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 strncasecmp_l __redirect_strncasecmp_l
|
||||
# define __strncasecmp_l __redirect___strncasecmp_l
|
||||
# include <string.h>
|
||||
# undef strncasecmp_l
|
||||
# undef __strncasecmp_l
|
||||
|
||||
# define SYMBOL_NAME strncasecmp_l
|
||||
# include "ifunc-strcasecmp.h"
|
||||
|
||||
libc_ifunc_redirected (__redirect_strncasecmp_l, __strncasecmp_l,
|
||||
IFUNC_SELECTOR ());
|
||||
|
||||
weak_alias (__strncasecmp_l, strncasecmp_l)
|
||||
# ifdef SHARED
|
||||
__hidden_ver1 (__strncasecmp_l, __GI___strncasecmp_l,
|
||||
__redirect___strncasecmp_l)
|
||||
__attribute__ ((visibility ("hidden")));
|
||||
# endif
|
||||
#endif
|
||||
27
sysdeps/x86_64/multiarch/strncmp-sse2.S
Normal file
27
sysdeps/x86_64/multiarch/strncmp-sse2.S
Normal file
@ -0,0 +1,27 @@
|
||||
/* strcmp optimized with SSE2.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#define STRCMP __strncmp_sse2
|
||||
|
||||
#undef libc_hidden_builtin_def
|
||||
#define libc_hidden_builtin_def(strcmp)
|
||||
|
||||
#define USE_AS_STRNCMP
|
||||
#include <sysdeps/x86_64/strcmp.S>
|
||||
21
sysdeps/x86_64/multiarch/strncmp-sse4_2.S
Normal file
21
sysdeps/x86_64/multiarch/strncmp-sse4_2.S
Normal file
@ -0,0 +1,21 @@
|
||||
/* strncmp optimized with SSE4.2.
|
||||
Copyright (C) 2017 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 STRCMP_SSE42 __strncmp_sse42
|
||||
#define USE_AS_STRNCMP
|
||||
#include "strcmp-sse42.S"
|
||||
@ -1,6 +1,28 @@
|
||||
#ifdef SHARED
|
||||
# define USE_SSSE3 1
|
||||
# define STRCMP __strncmp_ssse3
|
||||
# define USE_AS_STRNCMP
|
||||
# include "../strcmp.S"
|
||||
#endif
|
||||
/* strcmp optimized with SSSE3.
|
||||
Copyright (C) 2017 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/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#define STRCMP __strncmp_ssse3
|
||||
|
||||
#undef libc_hidden_builtin_def
|
||||
#define libc_hidden_builtin_def(strcmp)
|
||||
|
||||
#define USE_SSSE3 1
|
||||
#define USE_AS_STRNCMP
|
||||
#include <sysdeps/x86_64/strcmp.S>
|
||||
|
||||
@ -1,5 +0,0 @@
|
||||
/* Multiple versions of strncmp
|
||||
All versions must be listed in ifunc-impl-list.c. */
|
||||
#define STRCMP strncmp
|
||||
#define USE_AS_STRNCMP
|
||||
#include "strcmp.S"
|
||||
54
sysdeps/x86_64/multiarch/strncmp.c
Normal file
54
sysdeps/x86_64/multiarch/strncmp.c
Normal file
@ -0,0 +1,54 @@
|
||||
/* Multiple versions of strncmp.
|
||||
All versions must be listed in ifunc-impl-list.c.
|
||||
Copyright (C) 2017 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
|
||||
Loading…
x
Reference in New Issue
Block a user