x86-64: Require BMI2 for __strlen_evex and __strnlen_evex

Since __strlen_evex and __strnlen_evex added by

commit 1fd8c163a83d96ace1ff78fa6bac7aee084f6f77
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Mar 5 06:24:52 2021 -0800

    x86-64: Add ifunc-avx2.h functions with 256-bit EVEX

use sarx:

c4 e2 6a f7 c0       	sarx   %edx,%eax,%eax

require BMI2 for __strlen_evex and __strnlen_evex in ifunc-impl-list.c.
ifunc-avx2.h already requires BMI2 for EVEX implementation.

(cherry picked from commit 55bf411b451c13f0fb7ff3d3bf9a820020b45df1)

diff --git a/sysdeps/x86_64/multiarch/ifunc-impl-list.c b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
index 11e9e258209c71703de59044b83a2a5ed1f10101..e5af769869b8ab57033608870bd32747f538b9b6 100644 (file)
--- a/sysdeps/x86_64/multiarch/ifunc-impl-list.c
+++ b/sysdeps/x86_64/multiarch/ifunc-impl-list.c
@@ -295,7 +295,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
                              __strlen_avx2_rtm)
              IFUNC_IMPL_ADD (array, i, strlen,
                              (CPU_FEATURE_USABLE (AVX512VL)
-                              && CPU_FEATURE_USABLE (AVX512BW)),
+                              && CPU_FEATURE_USABLE (AVX512BW)
+                              && CPU_FEATURE_USABLE (BMI2)),
                              __strlen_evex)
              IFUNC_IMPL_ADD (array, i, strlen, 1, __strlen_sse2))
 
@@ -312,7 +313,8 @@ __libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
                              __strnlen_avx2_rtm)
              IFUNC_IMPL_ADD (array, i, strnlen,
                              (CPU_FEATURE_USABLE (AVX512VL)
-                              && CPU_FEATURE_USABLE (AVX512BW)),
+                              && CPU_FEATURE_USABLE (AVX512BW)
+                              && CPU_FEATURE_USABLE (BMI2)),
                              __strnlen_evex)
              IFUNC_IMPL_ADD (array, i, strnlen, 1, __strnlen_sse2))