pub unsafe fn _mm256_castph128_ph256(a: __m128h) -> __m256h🔬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.Expand description
Cast vector of type __m128h to type __m256h. The upper 8 elements of the result are undefined.
In practice, the upper elements are zeroed. This intrinsic can generate the vzeroupper instruction,
but most of the time it does not generate any instructions.