> _mm256_cvtps_epu32 that represent a low-level operation in a specific instruction set (this is a float to int cast from AVX2) That instruction is from AVX-51

> _mm256_cvtps_epu32 that represent a low-level operation in a specific instruction set (this is a float to int cast from AVX2) That instruction is from AVX-512. There’s no AVX2 float to int cast. There’s in AVX1, the int is signed and the instruction is _mm256_cvtps_epi32.