H.J. Lu dc485ceb2a x86-64: Optimize strlen/strnlen/wcslen/wcsnlen with AVX2 ... Optimize strlen/strnlen/wcslen/wcsnlen with AVX2 to check 32 bytes with a single vector compare instruction. It is as fast as SSE2 versions for size <= 16 bytes and up to 1X faster for or size > 16 bytes on Haswell. Select AVX2 version on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast. NB: It uses TZCNT instead of BSF since TZCNT produces the same result as BSF for non-zero input. TZCNT is faster than BSF and is executed as BSF if machine doesn't support TZCNT. * sysdeps/x86_64/multiarch/Makefile (sysdep_routines): Add strlen-sse2, strnlen-sse2, strlen-avx2, strnlen-avx2, wcslen-sse2, wcslen-avx2 and wcsnlen-avx2. * sysdeps/x86_64/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add tests for __strlen_avx2, __strlen_sse2, __strnlen_avx2, __strnlen_sse2, __wcslen_avx2, __wcslen_sse2 and __wcsnlen_avx2. * sysdeps/x86_64/multiarch/strlen-avx2.S: New file. * sysdeps/x86_64/multiarch/strlen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strlen.c: Likewise. * sysdeps/x86_64/multiarch/strnlen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/strnlen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/strnlen.c: Likewise. * sysdeps/x86_64/multiarch/wcslen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcslen-sse2.S: Likewise. * sysdeps/x86_64/multiarch/wcslen.c: Likewise. * sysdeps/x86_64/multiarch/wcsnlen-avx2.S: Likewise. * sysdeps/x86_64/multiarch/wcsnlen.c (OPTIMIZE (avx2)): New. (IFUNC_SELECTOR): Return OPTIMIZE (avx2) on AVX2 machines where vzeroupper is preferred and AVX unaligned load is fast.		2017-06-09 05:18:18 -07:00
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aarch64	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
alpha	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
arm	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
generic	ld.so: Consolidate 2 strtouls into _dl_strtoul [BZ #21528]	2017-06-08 12:52:42 -07:00
gnu	Regenerate sysdeps/gnu/errlist.c.	2017-06-04 15:27:14 -04:00
hppa	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
i386	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
ia64	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
ieee754	float128: Add strfromf128	2017-06-07 17:08:21 -03:00
init_array	Update copyright dates with scripts/update-copyrights.	2017-01-01 00:14:16 +00:00
m68k	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
mach	Fix struct sigaltstack namespace (bug 21517).	2017-06-05 10:17:46 +00:00
microblaze	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
mips	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
nios2	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
nptl	fork: Remove bogus parent PID assertions [BZ #21386]	2017-05-12 16:04:16 +02:00
posix	getaddrinfo: Eliminate another strdup call	2017-06-03 08:37:31 +02:00
powerpc	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
pthread	Remove __need macros from signal.h.	2017-05-20 19:04:43 -04:00
s390	S390: Use generic spinlock code.	2017-06-06 09:41:56 +02:00
sh	Move shared pthread definitions to common headers	2017-05-09 17:49:17 -03:00
sparc	Make LD_HWCAP_MASK usable for static binaries	2017-06-07 11:11:40 +05:30
tile	Optimize generic spinlock code and use C11 like atomic macros.	2017-06-06 09:41:56 +02:00
unix	aarch64: Fix undefined behavior in _dl_procinfo	2017-06-09 14:18:12 +05:30
wordsize-32	Build divdi3 only for architecture that required it	2017-04-06 15:14:34 -03:00
wordsize-64	Add missing header files throughout the testsuite.	2017-02-16 17:33:18 -05:00
x86	Make LD_HWCAP_MASK usable for static binaries	2017-06-07 11:11:40 +05:30
x86_64	x86-64: Optimize strlen/strnlen/wcslen/wcsnlen with AVX2	2017-06-09 05:18:18 -07:00