Function vext_u8 

pub fn vext_u8(a: uint8x8_t, b: uint8x8_t, const N: i32) -> uint8x8_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.

Extract vector from pair of vectors Arm’s documentation