Function _mm_mask_rsqrt_sh

pub unsafe fn _mm_mask_rsqrt_sh(
    src: __m128h,
    k: __mmask8,
    a: __m128h,
    b: __m128h,
) -> __m128h

🔬This is a nightly-only experimental API. (stdarch_x86_avx512_f16 #127213)

Available on (x86 or x86-64) and target feature avx512fp16 and x86 only.

Compute the approximate reciprocal square root of the lower half-precision (16-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 7 packed elements from a to the upper elements of dst. The maximum relative error for this approximation is less than 1.5*2^-12.

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