Function _mm_mask_getexp_ph 

pub fn _mm_mask_getexp_ph(src: __m128h, k: __mmask8, a: __m128h) -> __m128h

Available on x86 and target feature avx512fp16 and target feature avx512vl only.

Convert the exponent of each packed half-precision (16-bit) floating-point element in a to a half-precision (16-bit) floating-point number representing the integer exponent, and store the results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set). This intrinsic essentially calculates floor(log2(x)) for each element.

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