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S390: Optimize memccpy.

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This patch provides optimized versions of memccpy with the z13 vector
instructions.

ChangeLog:

	* sysdeps/s390/multiarch/memccpy-c.c: New File.
	* sysdeps/s390/multiarch/memccpy-vx.S: Likewise.
	* sysdeps/s390/multiarch/memccpy.c: Likewise.
	* sysdeps/s390/multiarch/Makefile
	(sysdep_routines): Add memccpy functions.
	* sysdeps/s390/multiarch/ifunc-impl-list-common.c
	(__libc_ifunc_impl_list_common): Add ifunc test for memccpy.
	* string/memccpy.c: Use MEMCCPY if defined.
This commit is contained in:
Stefan Liebler
2015-08-26 10:26:25 +02:00
committed by Andreas Krebbel
parent 88eefd344b
commit 9b593dc305
7 changed files with 228 additions and 1 deletions
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4
string/memccpy.c
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@ -20,6 +20,10 @@
#undef __memccpy
#undef memccpy
#ifdef MEMCCPY
# define __memccpy MEMCCPY
#endif
/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
Return the position in DEST one byte past where C was copied, or
NULL if C was not found in the first N bytes of SRC. */