Function __crc32ch 

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

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

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