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| author | Stefan Liebler <stli@linux.ibm.com> | 2019-03-22 11:14:08 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-03-22 11:14:08 +0100 |
| commit | 6f47401bd5fc71209219779a0426170a9a7395b0 (patch) | |
| tree | 2051a4e99c19afffe4e58521aca5bded7c913a73 /sysdeps/s390/multiarch | |
| parent | 96fbb9a328232e42814334d6e29a9a9c7995c01d (diff) | |
| download | glibc-6f47401bd5fc71209219779a0426170a9a7395b0.tar.gz glibc-6f47401bd5fc71209219779a0426170a9a7395b0.tar.xz glibc-6f47401bd5fc71209219779a0426170a9a7395b0.zip | |
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.
Diffstat (limited to 'sysdeps/s390/multiarch')
| -rw-r--r-- | sysdeps/s390/multiarch/ifunc-impl-list.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/s390/multiarch/ifunc-impl-list.c b/sysdeps/s390/multiarch/ifunc-impl-list.c index d742d66a6a..75289b582b 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) |