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## _mm256_sha512rnds2_epi64

# Function _mm256_sha512rnds2_epi64

1.89.0 · Source

    pub fn _mm256_sha512rnds2_epi64(a: __m256i, b: __m256i, k: __m128i) -> __m256i

Available on x86-64 and target feature `avx` and target feature `sha512` and (x86 or x86-64) only.
Expand description

This intrinsic performs two rounds of SHA512 operation using initial SHA512 state `(C,D,G,H)` from `a`, an initial SHA512 state `(A,B,E,F)` from `b`, and a pre-computed sum of the next two round message qwords and the corresponding round constants from `c` (only the two lower qwords of the third operand). The updated SHA512 state `(A,B,E,F)` is written to dst, and dst can be used as the updated state `(C,D,G,H)` in later rounds.

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