Comment 6 for bug 2001932

(In reply to Sunil Pandey from comment #4)
> Created attachment 12601 [details]
> strncmp_avx2 patch for pr25933
>
> Tested attached patch on
>
> https://gitlab.com/x86-glibc/glibc/-/commits/users/hjl/pr25933/master

Looks good. Please try this

diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2.S b/sysdeps/x86_64/multiarch/strcmp-avx2.S
index 48d03a9f46..dabc3e7590 100644
--- a/sysdeps/x86_64/multiarch/strcmp-avx2.S
+++ b/sysdeps/x86_64/multiarch/strcmp-avx2.S
@@ -256,6 +256,11 @@ L(next_3_vectors):
   vpmovmskb %ymm0, %ecx
   testl %ecx, %ecx
   jne L(return_3_vec_size)
+# ifdef USE_AS_STRNCMP
+ /* Check if VEC_SIZE * 4 already exceeded max compare count %r11 */
+ cmpq $(VEC_SIZE * 4), %r11
+ jbe L(zero)
+# endif
 L(main_loop_header):
   leaq (VEC_SIZE * 4)(%rdi), %rdx
   movl $PAGE_SIZE, %ecx