ktestz - Robuta Search

https://doc.rust-lang.org/beta/core/arch/x86/fn._ktestz_mask32_u8.html _ktestz_mask32_u8 in core::arch::x86 - Rust Compute the bitwise AND of 32-bit masks a and b, if the result is all zeros, store 1 in dst, otherwise store 0 in dst. core arch rust