glibc/sysdeps/unix/sysv/linux/sh
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
..
be String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
bits
le String: Add support for __memcmpeq() ABI on all targets 2021-10-26 16:51:29 -05:00
sh3
sh4
sys
Implies
Makefile
Versions
____longjmp_chk.S
adaptive_spin_count.h
arch-syscall.h Update syscall lists for Linux 5.14 2021-09-08 12:42:06 +00:00
atomic-machine.h
c++-types.data
clone.S
configure
configure.ac
jmp_buf-macros.h
kernel-features.h linux: Consolidate Linux setsockopt implementation 2021-07-06 11:45:35 -03:00
kernel_sigaction.h
kernel_stat.h
localplt.data mtrace: Wean away from malloc hooks 2021-07-22 18:38:06 +05:30
lowlevel-atomic.h
makecontext.S
pipe.S
register-dump.h
shlib-versions Move malloc hooks into a compat DSO 2021-07-22 18:37:59 +05:30
sigaltstack-offsets.sym
sigcontextinfo.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
syscall.S
syscalls.list
sysdep.S
sysdep.h Remove "Contributed by" lines 2021-09-03 22:06:44 +05:30
time64-compat.h
vfork.S