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This patch provides optimized versions of strrchr and wcsrchr with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/strrchr-c.c: New File.
* sysdeps/s390/multiarch/strrchr-vx.S: Likewise.
* sysdeps/s390/multiarch/strrchr.c: Likewise.
* sysdeps/s390/multiarch/wcsrchr-c.c: Likewise.
* sysdeps/s390/multiarch/wcsrchr-vx.S: Likewise.
* sysdeps/s390/multiarch/wcsrchr.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strrchr and
wcsrchr functions.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for strrchr, wcsrchr.
* benchtests/bench-wcsrchr.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcsrchr.
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