Function _mm256_mask_cvtepi16_ph
#[target_feature(enable = "avx512fp16", enable = "avx512vl")]
pub fn _mm256_mask_cvtepi16_ph(src: __m256h, k: __mmask16, a: __m256i) -> __m256hConvert packed signed 16-bit integers in a to packed half-precision (16-bit) floating-point elements, and store the results in dst using writemask k (elements are copied from src to dst when the corresponding mask bit is not set).