🔬 This is a nightly-only experimental API. (
This is supported on x86-64 and target feature
Shuffle 16-bit integers in the low 64 bits of 128-bit lanes of a using the control in imm8. Store the results in the low 64 bits of 128-bit lanes of dst, with the high 64 bits of 128-bit lanes being copied from from a to dst.