Function core::arch::x86::_mm_sllv_epi64

pub unsafe fn _mm_sllv_epi64(a: __m128i, count: __m128i) -> __m128i

This is supported on x86 and target feature avx2 only.

Shifts packed 64-bit integers in a left by the amount specified by the corresponding element in count while shifting in zeros, and returns the result.

Intel’s documentation