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| author | Stefan Liebler <stli@linux.ibm.com> | 2019-03-22 11:14:09 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-03-22 11:14:09 +0100 |
| commit | 421749d693c4147017bc55f5ac3227c3a6e4bf31 (patch) | |
| tree | 54c7b37b16907efbe5459e720c38b5f9e56fa088 /sysdeps/s390/memmem.c | |
| parent | 6f47401bd5fc71209219779a0426170a9a7395b0 (diff) | |
| download | glibc-421749d693c4147017bc55f5ac3227c3a6e4bf31.zip glibc-421749d693c4147017bc55f5ac3227c3a6e4bf31.tar.gz glibc-421749d693c4147017bc55f5ac3227c3a6e4bf31.tar.bz2 | |
S390: Add arch13 memmem ifunc variant.
This patch introduces the new arch13 ifunc variant for memmem.
For needles longer than 9 bytes 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 memmem-arch13.
* sysdeps/s390/ifunc-memmem.h (HAVE_MEMMEM_ARCH13, MEMMEM_ARCH13,
MEMMEM_Z13_ONLY_USED_AS_FALLBACK, HAVE_MEMMEM_IFUNC_AND_ARCH13_SUPPORT):
New defines.
* sysdeps/s390/memmem-arch13.S: New file.
* sysdeps/s390/memmem-vx.c: Omit GI symbol for z13 memmem ifunc variant
if it is only used as fallback.
* sysdeps/s390/memmem.c (memmem): Add arch13 variant in ifunc selector.
* sysdeps/s390/multiarch/ifunc-impl-list.c
(__libc_ifunc_impl_list): Add ifunc variant for arch13 memmem.
Diffstat (limited to 'sysdeps/s390/memmem.c')
| -rw-r--r-- | sysdeps/s390/memmem.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/sysdeps/s390/memmem.c b/sysdeps/s390/memmem.c index fe9598e..cf029a7 100644 --- a/sysdeps/s390/memmem.c +++ b/sysdeps/s390/memmem.c @@ -34,8 +34,14 @@ extern __typeof (__redirect_memmem) MEMMEM_C attribute_hidden; extern __typeof (__redirect_memmem) MEMMEM_Z13 attribute_hidden; # endif +# if HAVE_MEMMEM_ARCH13 +extern __typeof (__redirect_memmem) MEMMEM_ARCH13 attribute_hidden; +# endif + s390_libc_ifunc_expr (__redirect_memmem, __memmem, - (HAVE_MEMMEM_Z13 && (hwcap & HWCAP_S390_VX)) + (HAVE_MEMMEM_ARCH13 && (hwcap & HWCAP_S390_VXRS_EXT2)) + ? MEMMEM_ARCH13 + : (HAVE_MEMMEM_Z13 && (hwcap & HWCAP_S390_VX)) ? MEMMEM_Z13 : MEMMEM_DEFAULT ) |