[Bug target/126429] [i386] _mm512_{mask,maskz}_dpbf16_ps only honor the low 8 bits of the __mmask16 (kmovb instead of kmovw)

[haochen.jiang at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126429

--- Comment #1 from Haochen Jiang <haochen.jiang at intel dot com> ---
Confirmed. It should not emit kmovb under -mavx512dq -mavx512bf16.

https://godbolt.org/z/T46G4deG7

A quick patch underway after I did a test.