Function _mm_shldi_epi64

pub unsafe fn _mm_shldi_epi64<const IMM8: i32>(
    a: __m128i,
    b: __m128i,
) -> __m128i

🔬This is a nightly-only experimental API. (stdarch_x86_avx512)

Available on x86 only.

Concatenate packed 64-bit integers in a and b producing an intermediate 128-bit result. Shift the result left by imm8 bits, and store the upper 64-bits in dst).

Intel’s documentation