# Function core::arch::x86::_mm_mask_rcp14_sd
[−][src]

    pub unsafe fn _mm_mask_rcp14_sd(
        src: __m128d,
        k: __mmask8,
        a: __m128d,
        b: __m128d
    ) -> __m128d

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

Compute the approximate reciprocal of the lower double-precision (64-bit) floating-point element in b, store the result in the lower element of dst using writemask k (the element is copied from src when mask bit 0 is not set), and copy the upper element from a to the upper element of dst. The maximum relative error for this approximation is less than 2^-14.

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