Function _mm256_maskz_getexp_ph
#[target_feature(enable = "avx512fp16", enable = "avx512vl")]
pub fn _mm256_maskz_getexp_ph(k: __mmask16, a: __m256h) -> __m256hConvert 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 zeromask
k (elements are zeroed out when the corresponding mask bit is not set). This intrinsic essentially calculates
floor(log2(x)) for each element.