Function core::arch::x86_64::_mm_maskz_rsqrt14_sd

pub unsafe fn _mm_maskz_rsqrt14_sd(
    k: __mmask8, 
    a: __m128d, 
    b: __m128d
) -> __m128d

🔬 This is a nightly-only experimental API. (stdsimd #48556)

Available on x86-64 and target feature avx512f only.

Compute the approximate reciprocal square root of the lower double-precision (64-bit) floating-point element in b, 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. The maximum relative error for this approximation is less than 2^-14.

Intel’s documentation