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This patch provides optimized versions of strncpy and wcsncpy with the z13
vector instructions.
ChangeLog:
* sysdeps/s390/multiarch/strncpy-vx.S: New File.
* sysdeps/s390/multiarch/strncpy.c: Likewise.
* sysdeps/s390/multiarch/wcsncpy-c.c: Likewise.
* sysdeps/s390/multiarch/wcsncpy-vx.S: Likewise.
* sysdeps/s390/multiarch/wcsncpy.c: Likewise.
* sysdeps/s390/s390-32/multiarch/strncpy.c: Likewise.
* sysdeps/s390/s390-64/multiarch/strncpy.c: Likewise.
* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strncpy and
wcsncpy functions.
* wcsmbs/wcsncpy.c: Use WCSNCPY if defined.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc test for strncpy, wcsncpy.
* string/test-strncpy.c: Add wcsncpy support.
* wcsmbs/test-wcsncpy.c: New File.
* wcsmbs/Makefile (strop-tests): Add wcsncpy.
* benchtests/bench-strncpy.c: Add wcsncpy support.
* benchtests/bench-wcsncpy.c: New File.
* benchtests/Makefile (wcsmbs-bench): Add wcsncpy
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