Function _mm_shldv_epi64 

pub fn _mm_shldv_epi64(a: __m128i, b: __m128i, c: __m128i) -> __m128i

Available on x86-64 and target feature avx512vbmi2 and target feature avx512vl only.

Concatenate packed 64-bit integers in a and b producing an intermediate 128-bit result. Shift the result left by the amount specified in the corresponding element of c, and store the upper 64-bits in dst.

Intel’s documentation