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S390: Optimize memrchr.

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This patch provides optimized version of memrchr with the z13 vector
instructions.

ChangeLog:

	* sysdeps/s390/multiarch/memrchr-c.c: New File.
	* sysdeps/s390/multiarch/memrchr-vx.S: Likewise.
	* sysdeps/s390/multiarch/memrchr.c: Likewise.
	* sysdeps/s390/multiarch/Makefile
	(sysdep_routines): Add memrchr functions.
	* sysdeps/s390/multiarch/ifunc-impl-list-common.c
	(__libc_ifunc_impl_list_common): Add ifunc test for memrchr.
This commit is contained in:
Stefan Liebler
2015-08-26 10:26:26 +02:00
committed by Andreas Krebbel
parent f21216015b
commit 798f5b4b5d
6 changed files with 227 additions and 1 deletions
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2
sysdeps/s390/multiarch/ifunc-impl-list.c
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@@ -137,6 +137,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
IFUNC_VX_IMPL (wmemcmp);
IFUNC_VX_IMPL (memrchr);
#endif /* HAVE_S390_VX_ASM_SUPPORT */
return i;