Function vsetq_lane_s16 

pub fn vsetq_lane_s16(a: i16, b: int16x8_t, const LANE: i32) -> int16x8_t

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

Insert vector element from another vector element Arm’s documentation