Function __crc32ch 

pub fn __crc32ch(crc: u32, data: u16) -> u32

Available on target feature crc and (AArch64 or ARM or ARM64EC) and (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) only.

CRC32-C single round checksum for bytes (16 bits). Arm’s documentation