// s390x:-"RISBGZ",-"AND",-"LOCGR"
	return v << (s & 63)
}

func rshMask64Ux64(v uint64, s uint64) uint64 {
	// arm64:"LSR",-"AND",-"CSEL"
	// ppc64x:"RLDICL",-"ORN",-"ISEL"
	// riscv64:"SRL\t",-"AND\t",-"SLTIU"
	// s390x:-"RISBGZ",-"AND",-"LOCGR"
	return v >> (s & 63)
}

func rshMask64x64(v int64, s uint64) int64 {
	// arm64:"ASR",-"AND",-"CSEL"
	// ppc64x:"RLDICL",-"ORN",-"ISEL"