glibc/sysdeps/mach
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
..
htl
hurd String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
i386
include
sys
_strerror.c
adjtime.c
clock_gettime.c
clock_nanosleep.c
configure
configure.ac
getloadavg.c
getpagesize.c
getsysstats.c misc: Add __get_nprocs_sched 2021-09-27 09:13:06 -03:00
libc-lock.h mach lll_lock/unlock: Explicitly request private locking 2021-09-15 01:36:08 +02:00
libmachuser.abilist
Makefile
mprotect.c
msync.c
munmap.c
pagecopy.h
readonly-area.c
sched_yield.c
sleep.c
strerror_l.c
Subdirs
sysdep.h
thread_state.h
usleep.c
xpg-strerror.c