powerpc: Remove power7 strstr optimization

The optimization is not faster than the generic algorithm,
using the bench-strstr the geometric mean running on a POWER10 machine
using gcc 13.1.1 is 482.47 while the default __strstr_ppc is 340.97
(which uses the generic implementation).

Also, there is no need to redirect the internal str*/mem* call
to optimized version, internal ifunc is supported and enabled
for internal calls (meaning that the generic implementation
will use any asm optimization if available).

Checked on powerpc64le-linux-gnu.
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>

1 files changed, 0 insertions, 9 deletions

diff --git a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
index 5b2d6a90ab..e3e6f5fd10 100644
--- a/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
@@ -432,15 +432,6 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
              IFUNC_IMPL_ADD (array, i, strcspn, 1,
                              __strcspn_ppc))
 
-  /* Support sysdeps/powerpc/powerpc64/multiarch/strstr.c.  */
-  IFUNC_IMPL (i, name, strstr,
-             IFUNC_IMPL_ADD (array, i, strstr,
-                             hwcap & PPC_FEATURE_ARCH_2_06,
-                             __strstr_power7)
-             IFUNC_IMPL_ADD (array, i, strstr, 1,
-                             __strstr_ppc))
-
-
   /* Support sysdeps/powerpc/powerpc64/multiarch/strcasestr.c.  */
   IFUNC_IMPL (i, name, strcasestr,
 	      IFUNC_IMPL_ADD (array, i, strcasestr,