- (cond ((zerop (tn-offset value))
- ;; Value is in ST0
- (inst fst (make-ea :dword :base sap :disp offset))
- (unless (zerop (tn-offset result))
- ;; Value is in ST0 but not result.
- (inst fst result)))
- (t
- ;; Value is not in ST0.
- (inst fxch value)
- (inst fst (make-ea :dword :base sap :disp offset))
- (cond ((zerop (tn-offset result))
- ;; The result is in ST0.
- (inst fst value))
- (t
- ;; Neither value or result are in ST0
- (unless (location= value result)
- (inst fst result))
- (inst fxch value)))))))
-\f
-;;;; SAP-REF-LONG
-#+nil
-(define-vop (sap-ref-long)
- (:translate sap-ref-long)
- (:policy :fast-safe)
- (:args (sap :scs (sap-reg))
- (offset :scs (signed-reg)))
- (:arg-types system-area-pointer signed-num)
- (:results (result :scs (#!+long-float long-reg #!-long-float double-reg)))
- (:result-types #!+long-float long-float #!-long-float double-float)
- (:generator 5
- (with-empty-tn@fp-top(result)
- (inst fldl (make-ea :qword :base sap :index offset)))))
-#+nil
-(define-vop (sap-ref-long-c)
- (:translate sap-ref-long)
- (:policy :fast-safe)
- (:args (sap :scs (sap-reg)))
- (:arg-types system-area-pointer (:constant (signed-byte 64)))
- (:info offset)
- (:results (result :scs (#!+long-float long-reg #!-long-float double-reg)))
- (:result-types #!+long-float long-float #!-long-float double-float)
- (:generator 4
- (with-empty-tn@fp-top(result)
- (inst fldl (make-ea :qword :base sap :disp offset)))))