# Function _mm512_castph256_ph512

Source

    pub fn _mm512_castph256_ph512(a: __m256h) -> __m512h

🔬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 `__m256h` to type `__m512h`. The upper 16 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.

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