# Function _mm_rsqrt14_sd

1.89.0 · Source

    pub fn _mm_rsqrt14_sd(a: __m128d, b: __m128d) -> __m128d

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, 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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