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3ec7c02cc3
glibc/string
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Florian Weimer 3ec7c02cc3 x86-64: memcmp-avx2-movbe.S needs saturating subtraction [BZ #21662] 
This code:

L(between_2_3):
	/* Load as big endian with overlapping loads and bswap to avoid
	   branches.  */
	movzwl	-2(%rdi, %rdx), %eax
	movzwl	-2(%rsi, %rdx), %ecx
	shll	$16, %eax
	shll	$16, %ecx
	movzwl	(%rdi), %edi
	movzwl	(%rsi), %esi
	orl	%edi, %eax
	orl	%esi, %ecx
	bswap	%eax
	bswap	%ecx
	subl	%ecx, %eax
	ret

needs a saturating subtract because the full register is used.
With this commit, only the lower 24 bits of the register are used,
so a regular subtraction suffices.

The test case change adds coverage for these kinds of bugs.
2017-06-23 17:24:40 +02:00
..
bits Remove bits/string.h. 2017-06-20 08:21:24 -04:00
_strerror.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-addsep.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-append.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-count.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-create.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-ctsep.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-delete.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-extract.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-insert.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-next.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-replace.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz-stringify.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
argz.h Remove __need macros from errno.h (__need_Emath, __need_error_t). 2017-06-14 08:14:34 -04:00
basename.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bcopy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bug-envz1.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
bug-strcoll1.c
bug-strcoll2.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
bug-strncat1.c
bug-strpbrk1.c
bug-strspn1.c
bug-strtok1.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
byteswap.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
bzero.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Depend
endian.h Make endian-conversion macros always return correct types (bug 16458). 2017-01-11 15:28:08 +00:00
envz.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
envz.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
explicit_bzero.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
ffsll.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
inl-tester.c
Makefile Remove bits/string.h. 2017-06-20 08:21:24 -04:00
memccpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memchr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memfrob.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memmem.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memmove.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memory.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
mempcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memrchr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
memset.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
noinl-tester.c
rawmemchr.c Fix rawmemchr build with GCC 8. 2017-05-10 00:25:59 +00:00
stpcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stpncpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
str-two-way.h Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
stratcliff.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
strcasecmp_l.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcasecmp.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strcasestr.c Miscellaneous low-risk changes preparing for _ISOMAC testsuite. 2017-03-01 20:32:50 -05:00
strcat.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strchr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strchrnul.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcoll_l.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strcoll.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strcspn.c Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
strdup.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strerror_l.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strerror.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strfry.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
string-inlines.c Remove bits/string.h. 2017-06-20 08:21:24 -04:00
string.h Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strings.h Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strlen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncase_l.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncase.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strncat.c Remove bits/string.h. 2017-06-20 08:21:24 -04:00
strncmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strncpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strndup.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strnlen.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strpbrk.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strrchr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strsep.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strsignal.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strspn.c Narrowing the visibility of libc-internal.h even further. 2017-03-01 20:33:46 -05:00
strstr.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strtok_r.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strtok.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strverscmp.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
strxfrm_l.c Use locale_t, not __locale_t, throughout glibc 2017-06-20 20:30:06 -04:00
strxfrm.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
swab.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-bcopy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-bzero.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-endian-types.c Make endian-conversion macros always return correct types (bug 16458). 2017-01-11 15:28:08 +00:00
test-explicit_bzero.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-ffs.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-memccpy.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-memchr.c Add memchr tests for n == 0 2017-05-25 11:38:01 -07:00
test-memcmp.c x86-64: memcmp-avx2-movbe.S needs saturating subtraction [BZ #21662] 2017-06-23 17:24:40 +02:00
test-memcpy.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-memmem.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-memmove.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-mempcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-memrchr.c Add more tests for memchr 2017-06-08 09:56:01 -07:00
test-memset.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-rawmemchr.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-stpcpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-stpncpy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-strcasecmp.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strcasestr.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strcat.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strchr.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strchrnul.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-strcmp.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strcpy.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strcspn.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
test-string.h Suppress internal declarations for most of the testsuite. 2017-05-11 19:27:59 -04:00
test-strlen.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strncasecmp.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strncat.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strncmp.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strncpy.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strnlen.c Add page tests to string/test-strnlen. 2017-04-05 10:28:41 -03:00
test-strpbrk.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strrchr.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strspn.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
test-strstr.c Suppress internal declarations for most of the testsuite. 2017-05-11 19:27:59 -04:00
testcopy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
tester.c Split DIAG_* macros to new header libc-diag.h. 2017-02-25 09:59:46 -05:00
tst-bswap.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-cmp.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-endian.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-inlcall.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strcoll-overflow.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strfry.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strlen.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strtok_r.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strtok.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strxfrm2.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-strxfrm.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-svc2.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-svc.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-svc.expect * string/strverscmp.c (__strverscmp): Fix last cleanups. 2009-04-07 06:51:59 +00:00
tst-svc.input * string/strverscmp.c (__strverscmp): Fix last cleanups. 2009-04-07 06:51:59 +00:00
tst-xbzero-opt.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
Versions New string function explicit_bzero (from OpenBSD). 2016-12-16 16:21:54 -05:00
wordcopy.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00
xpg-strerror.c Update copyright dates with scripts/update-copyrights. 2017-01-01 00:14:16 +00:00