(:temporary (:sc any-reg :from (:argument 0)) src)
(:temporary (:sc any-reg :from (:argument 1)) dst end)
(:temporary (:sc descriptor-reg :from (:argument 1)) temp)
(:results (start :scs (any-reg))
(:temporary (:sc any-reg :from (:argument 0)) src)
(:temporary (:sc any-reg :from (:argument 1)) dst end)
(:temporary (:sc descriptor-reg :from (:argument 1)) temp)
(:results (start :scs (any-reg))