Function vdup_laneq_p8 

pub fn vdup_laneq_p8(a: poly8x16_t, const N: i32) -> poly8x8_t

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

Available on (AArch64 or target_arch=arm64ec) and target feature neon and target feature v7 only.

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