Function _mm_cvtsepi32_epi8 

pub fn _mm_cvtsepi32_epi8(a: __m128i) -> __m128i

Available on x86-64 and target feature avx512f and target feature avx512vl only.

Convert packed signed 32-bit integers in a to packed 8-bit integers with signed saturation, and store the results in dst.

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