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d3496c9f4f
glibc/string
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Wilco Dijkstra d3496c9f4f Improve generic strcspn performance 
Improve strcspn performance using a much faster algorithm.  It is kept simple
so it works well on most targets.  It is generally at least 10 times faster
than the existing implementation on bench-strcspn on a few AArch64
implementations, and for some tests 100 times as fast (repeatedly calling
strchr on a small string is extremely slow...).

In fact the string/bits/string2.h inlines make no longer sense, as GCC
already uses strlen if reject is an empty string, strchrnul is 5 times as
fast as __strcspn_c1, while __strcspn_c2 and __strcspn_c3 are slower than
the strcspn main loop for large strings (though reject length 2-4 could be
special cased in the future to gain even more performance).

Tested on x86_64, i686, and aarch64.

	* string/Version (libc): Add GLIBC_2.24.
	* string/strcspn.c (strcspn): Rewrite function.
	* string/bits/string2.h (strcspn): Use __builtin_strcspn.
	(__strcspn_c1): Remove inline function.
	(__strcspn_c2): Likewise.
	(__strcspn_c3): Likewise.
	* string/string-inline.c
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c1): Add
	compatibility symbol.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c2):
	Likewise.
	[SHLIB_COMPAT(libc, GLIBC_2_1_1, GLIBC_2_24)] (__strcspn_c3):
	Likewise.
	* sysdeps/i386/string-inlines.c: Include generic string-inlines.c.
2016-04-01 10:44:40 -03:00
..
bits Improve generic strcspn performance 2016-04-01 10:44:40 -03:00
_strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-addsep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-append.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-count.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-create.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-ctsep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-delete.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-extract.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-insert.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-next.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-replace.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz-stringify.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
argz.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
basename.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug-envz1.c
bug-strcoll1.c
bug-strcoll2.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bug-strncat1.c
bug-strpbrk1.c
bug-strspn1.c
bug-strtok1.c
byteswap.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
bzero.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
Depend
endian.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
envz.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
envz.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
ffsll.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
inl-tester.c
Makefile Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memccpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memfrob.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memmem.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memmove.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memory.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
mempcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
memset.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
noinl-tester.c
rawmemchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stpcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stpncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
str-two-way.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
stratcliff.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasecmp_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcasestr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strchrnul.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcoll_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcoll.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strcspn.c Improve generic strcspn performance 2016-04-01 10:44:40 -03:00
strdup.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strerror_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strfry.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
string-inlines.c Improve generic strcspn performance 2016-04-01 10:44:40 -03:00
string.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strings.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncase_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncase.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strndup.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strnlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strpbrk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strsep.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strsignal.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strspn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strstr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strtok_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strtok.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strverscmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strxfrm_l.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
strxfrm.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
swab.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-bcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-bzero.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-ffs.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memccpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memmem.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memmove.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-mempcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-memset.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-rawmemchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-stpcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-stpncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcasestr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strchrnul.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strcspn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-string.h Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncasecmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncat.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncmp.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strncpy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strnlen.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strpbrk.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strrchr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strspn.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
test-strstr.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
testcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tester.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-bswap.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-endian.c S390: Fix build failure in test string/tst-endian.c with gcc 6. 2016-01-25 12:44:46 +01:00
tst-inlcall.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strcoll-overflow.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strfry.c
tst-strlen.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-strtok_r.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
tst-strtok.c
tst-strxfrm2.c Let 'make check subdirs=string' succeed even when it's invoked 2015-09-28 16:55:57 -04:00
tst-strxfrm.c
tst-svc2.c
tst-svc.c Modify several tests to use test-skeleton.c 2015-08-06 02:59:04 -04:00
tst-svc.expect
tst-svc.input
Versions Improve generic strcspn performance 2016-04-01 10:44:40 -03:00
wordcopy.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00
xpg-strerror.c Update copyright dates with scripts/update-copyrights. 2016-01-04 16:05:18 +00:00