# Function core::arch::x86_64::_mm512_mask_mullox_epi64

source · [−]

    pub unsafe fn _mm512_mask_mullox_epi64(
        src: __m512i,
        k: __mmask8,
        a: __m512i,
        b: __m512i
    ) -> __m512i

🔬 This is a nightly-only experimental API. (`stdsimd` #48556)
Available on x86-64 and target feature `avx512f` only.
Expand description

Multiplies elements in packed 64-bit integer vectors a and b together, storing the lower 64 bits of the result in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

Intel’s documentation

This intrinsic generates a sequence of instructions, which may perform worse than a native instruction. Consider the performance impact of this intrinsic.