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This patch provides optimized versions of strchrnul and wcschrnul with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/strchrnul-c.c: New File.
* sysdeps/s390/multiarch/strchrnul-vx.S: Likewise.
* sysdeps/s390/multiarch/strchrnul.c: Likewise.
* sysdeps/s390/multiarch/wcschrnul-c.c: Likewise.
* sysdeps/s390/multiarch/wcschrnul-vx.S: Likewise.
* sysdeps/s390/multiarch/wcschrnul.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strchrnul and
wcschrnul functions.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for strchrnul, wcschrnul.
* wcsmbs/wcschrnul.c: Use WCSCHRNUL if defined.
* string/test-strchr.c: Add wcschrnul support.
* wcsmbs/test-wcschrnul.c: New File.
* wcsmbs/Makefile (strop-tests): Add wcschrnul.
* benchtests/bench-strchr.c: Add wcschrnul support.
* benchtests/bench-wcschrnul.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcschrnul.
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