Function _mm256_sha512msg2_epi64

#[target_feature(enable = "sha512", enable = "avx")]
pub fn _mm256_sha512msg2_epi64(a: __m256i, b: __m256i) -> __m256i

This intrinsic is one of the two SHA512 message scheduling instructions. The intrinsic performs the final calculation for the next four SHA512 message qwords. The calculated results are stored in dst.

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