Function core::arch::x86::_mm_mask_rsqrt14_sd
source · pub unsafe fn _mm_mask_rsqrt14_sd(
src: __m128d,
k: __mmask8,
a: __m128d,
b: __m128d
) -> __m128d
🔬This is a nightly-only experimental API. (
stdsimd
#48556)Available on (x86 or x86-64) and target feature
avx512f
and x86 only.Expand description
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 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.