# [−][src]Function core::arch::x86_64::_mm_movemask_pi8

    pub unsafe fn _mm_movemask_pi8(a: __m64) -> i32

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
This is supported on x86-64 and target feature `sse,mmx` only.

Takes the most significant bit from each 8-bit element in a 64-bit integer vector to create a 16-bit mask value. Zero-extends the value to 32-bit integer and writes it to the destination.