# Function core::arch::x86::_mm_maskz_fmadd_sd[−][src]

    pub unsafe fn _mm_maskz_fmadd_sd(
        k: __mmask8,
        a: __m128d,
        b: __m128d,
        c: __m128d
    ) -> __m128d

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

Multiply the lower double-precision (64-bit) floating-point elements in a and b, and add the intermediate result to the lower element in c. Store the result in the lower element of dst using zeromask k (the element is zeroed out when mask bit 0 is not set), and copy the upper element from a to the upper element of dst.

Intel’s documentation