Function vrsubhn_high_u32 

pub fn vrsubhn_high_u32(
    a: uint16x4_t,
    b: uint32x4_t,
    c: uint32x4_t,
) -> uint16x8_t

Available on (AArch64 or target_arch=arm64ec) and little-endian and target feature neon only.

Rounding subtract returning high narrow Arm’s documentation