Function vcopyq_lane_s8

pub unsafe fn vcopyq_lane_s8(
    a: int8x16_t,
    const LANE1: i32,
    b: int8x8_t,
    const LANE2: i32,
) -> int8x16_t

Available on (AArch64 or target_arch="arm64ec") and target feature neon only.

Insert vector element from another vector element

Arm’s documentation