From 6f47401bd5fc71209219779a0426170a9a7395b0 Mon Sep 17 00:00:00 2001 From: Stefan Liebler Date: Fri, 22 Mar 2019 11:14:08 +0100 Subject: S390: Add arch13 strstr ifunc variant. This patch introduces the new arch13 ifunc variant for strstr. For needles longer than 9 charachters it is relying on the common-code implementation. For shorter needles it is using the new vstrs instruction which is able to search a substring within a vector register. ChangeLog: * sysdeps/s390/Makefile (sysdep_routines): Add strstr-arch13. * sysdeps/s390/ifunc-strstr.h (HAVE_STRSTR_ARCH13, STRSTR_ARCH13, STRSTR_Z13_ONLY_USED_AS_FALLBACK, HAVE_STRSTR_IFUNC_AND_ARCH13_SUPPORT): New defines. * sysdeps/s390/multiarch/ifunc-impl-list.c (__libc_ifunc_impl_list): Add ifunc variant for arch13 strstr. * sysdeps/s390/strstr-arch13.S: New file. * sysdeps/s390/strstr-vx.c: Omit GI symbol for z13 strstr ifunc variant if it is only used as fallback. * sysdeps/s390/strstr.c (strstr): Add arch13 variant in ifunc selector. --- sysdeps/s390/multiarch/ifunc-impl-list.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'sysdeps/s390/multiarch') diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index d742d66..75289b5 100644 --- a/sysdeps/s390/multiarch/ifunc-impl-list.c +++ b/sysdeps/s390/multiarch/ifunc-impl-list.c @@ -186,6 +186,10 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array, #if HAVE_STRSTR_IFUNC IFUNC_IMPL (i, name, strstr, +# if HAVE_STRSTR_ARCH13 + IFUNC_IMPL_ADD (array, i, strstr, + dl_hwcap & HWCAP_S390_VXRS_EXT2, STRSTR_ARCH13) +# endif # if HAVE_STRSTR_Z13 IFUNC_IMPL_ADD (array, i, strstr, dl_hwcap & HWCAP_S390_VX, STRSTR_Z13) -- cgit v1.1