Function vdupq_lane_p16 

pub fn vdupq_lane_p16(a: poly16x4_t, const N: i32) -> poly16x8_t

🔬This is a nightly-only experimental API. (stdarch_arm_neon_intrinsics #111800)

Available on ARM and (AArch64 or ARM64EC or target feature v7) and (ARM or AArch64 or ARM64EC) and target feature neon only.

Set all vector lanes to the same value Arm’s documentation