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44829b3ddb
glibc/string
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Noah Goldstein 44829b3ddb String: Add support for __memcmpeq() ABI on all targets 
No bug.

This commit adds support for __memcmpeq() as a new ABI for all
targets. In this commit __memcmpeq() is implemented only as an alias
to the corresponding targets memcmp() implementation. __memcmpeq() is
added as a new symbol starting with GLIBC_2.35 and defined in string.h
with comments explaining its behavior. Basic tests that it is callable
and works where added in string/tester.c

As discussed in the proposal "Add new ABI '__memcmpeq()' to libc"
__memcmpeq() is essentially a reserved namespace for bcmp(). The means
is shares the same specifications as memcmp() except the return value
for non-equal byte sequences is any non-zero value. This is less
strict than memcmp()'s return value specification and can be better
optimized when a boolean return is all that is needed.

__memcmpeq() is meant to only be called by compilers if they can prove
that the return value of a memcmp() call is only used for its boolean
value.

All tests in string/tester.c passed. As well build succeeds on
x86_64-linux-gnu target.
2021-10-26 16:51:29 -05:00
..
bits Don't add access size hints to fortifiable functions 2021-10-20 08:33:31 +05:30
_strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
argz-addsep.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-append.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-count.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-create.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-ctsep.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-delete.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-extract.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-insert.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-next.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-replace.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz-stringify.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
argz.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
basename.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
bcopy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
bug-envz1.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
bug-strcoll1.c Update. 2001-04-26 20:45:18 +00:00
bug-strcoll2.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
bug-strncat1.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
bug-strpbrk1.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
bug-strspn1.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
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 2021-01-02 12:17:34 -08:00
bzero.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
Depend Update. 2001-03-19 21:40:15 +00:00
endian.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
envz.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
envz.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
explicit_bzero.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
ffs.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
ffsll.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
inl-tester.c Update. 1997-09-11 12:09:10 +00:00
Makefile dlfcn: Cleanups after -ldl is no longer required 2021-06-03 09:11:45 +02:00
memccpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memchr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memcmp.c String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
memcpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
memfrob.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memmem.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memmove.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
memory.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
mempcpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memrchr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
memset.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
noinl-tester.c Update. 1997-09-16 00:42:43 +00:00
rawmemchr.c string: Work around GCC PR 98512 in rawmemchr 2021-02-19 13:29:00 +01:00
sigabbrev_np.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
sigdescr_np.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stpcpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stpncpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
str-two-way.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
stratcliff.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strcasecmp_l.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcasecmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcasestr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcat.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strchr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strchrnul.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcoll_l.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strcoll.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strcpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strcspn.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strdup.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strerror_l.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strerrordesc_np.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strerrorname_np.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strfry.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
string-inlines.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
string.h String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
strings.h Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strlen.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strncase_l.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strncase.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strncat.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strncmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strncpy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strndup.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strnlen.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strpbrk.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strrchr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strsep.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strsignal.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strspn.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strstr.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strtok_r.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strtok.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strverscmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
strxfrm_l.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
strxfrm.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
swab.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-bcopy.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-bzero.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-endian-file-scope.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-endian-sign-conversion.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-endian-types.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-explicit_bzero.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-ffs.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memccpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memchr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memcmp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memcpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memmem.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memmove.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-mempcpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memrchr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-memset.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-rawmemchr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-sig_np.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-stpcpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-stpncpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strcasecmp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strcasestr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strcat.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strchr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strchrnul.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-strcmp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strcpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strcspn.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strerror-errno.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
test-string.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strlen.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strncasecmp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strncat.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strncmp.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strncpy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strnlen.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strpbrk.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strrchr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strspn.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
test-strstr.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
testcopy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tester.c String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
tst-bswap.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
tst-cmp.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-endian.c Update string tests to use the support test driver. 2017-03-23 11:32:29 -03:00
tst-inlcall.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-memmove-overflow.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-strcoll-overflow.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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-strsignal.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
tst-strtok_r.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00
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 2021-01-02 12:17:34 -08:00
Versions String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
wordcopy.c Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
xpg-strerror.c Update copyright dates with scripts/update-copyrights 2021-01-02 12:17:34 -08:00