// amd64/v3:`MOVBEW`,-`ROLW`
	// arm64:`MOVH`,`REV16W`,-`MOVB`
	// ppc64le:`MOVHBR`
	// ppc64:`MOVH\s`
	// s390x:`MOVH\s.*\(.*\)$`,-`SRW\s`,-`SRD\s`
	binary.BigEndian.PutUint16(b, x)
}

func store_be16_idx(b []byte, x uint16, idx int) {
	// amd64/v1,amd64/v2:`ROLW\s\$8`,-`SHR.`
	// amd64/v3:`MOVBEW\t[A-Z]+[0-9]*, \([A-Z]+[0-9]*\)\([A-Z]+[0-9]*\*1\)`
	// arm64:`MOVH\sR[0-9]+,\s\(R[0-9]+\)\(R[0-9]+\)`,`REV16W`,-`MOVB`