[PATCH v1 12/23] x86: Fix fallback for wcsncmp_avx2 in strcmp-avx2.S [BZ #28896]

[H.J. Lu]

On Wed, Mar 23, 2022 at 3:01 PM Noah Goldstein <goldstein.w.n@gmail.com> wrote:
>
> Overflow case for __wcsncmp_avx2_rtm should be __wcscmp_avx2_rtm not
> __wcscmp_avx2.
>
> All string/memory tests pass.
> ---
>  sysdeps/x86_64/multiarch/strcmp-avx2.S | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/sysdeps/x86_64/multiarch/strcmp-avx2.S b/sysdeps/x86_64/multiarch/strcmp-avx2.S
> index 52ff5ad724..86a86b68e3 100644
> --- a/sysdeps/x86_64/multiarch/strcmp-avx2.S
> +++ b/sysdeps/x86_64/multiarch/strcmp-avx2.S
> @@ -122,7 +122,7 @@ ENTRY(STRCMP)
>            are cases where length is large enough that it can never be a
>            bound on valid memory so just use wcscmp.  */
>         shrq    $56, %rcx
> -       jnz     __wcscmp_avx2
> +       jnz     OVERFLOW_STRCMP
>
>         leaq    (, %rdx, 4), %rdx
>  #  endif
> --
> 2.25.1
>

Isn't it a bug?  Is there a glibc bug? Should this also be fixed on release
branches?

-- 
H.J.