Function _mm256_sm4rnds4_epi32

#[target_feature(enable = "sm4", enable = "avx")]
pub fn _mm256_sm4rnds4_epi32(a: __m256i, b: __m256i) -> __m256i

This intrinsic performs four rounds of SM4 encryption. The intrinsic operates on independent 128-bit lanes. The calculated results are stored in dst.

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