# Function _ktestc_mask64_u8

Source

    pub fn _ktestc_mask64_u8(a: __mmask64, b: __mmask64) -> u8

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512` #111137)
Available on (x86 or x86-64) and target feature `avx512bw` and x86 only.
Expand description

Compute the bitwise NOT of 64-bit mask a and then AND with 8-bit mask b, if the result is all zeros, store 1 in dst, otherwise store 0 in dst.

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