+;;;; Modular arithmetic
+(define-modular-fun +-mod32 (x y) + :untagged nil 32)
+(define-vop (fast-+-mod32/unsigned=>unsigned fast-+/unsigned=>unsigned)
+ (:translate +-mod32))
+(define-vop (fast-+-mod32-c/unsigned=>unsigned fast-+-c/unsigned=>unsigned)
+ (:translate +-mod32))
+(define-modular-fun --mod32 (x y) - :untagged nil 32)
+(define-vop (fast---mod32/unsigned=>unsigned fast--/unsigned=>unsigned)
+ (:translate --mod32))
+(define-vop (fast---mod32-c/unsigned=>unsigned fast---c/unsigned=>unsigned)
+ (:translate --mod32))
+
+(define-vop (fast-ash-left-mod32-c/unsigned=>unsigned
+ fast-ash-c/unsigned=>unsigned)
+ (:translate ash-left-mod32))
+
+(define-vop (fast-ash-left-mod32/unsigned=>unsigned
+ fast-ash-left/unsigned=>unsigned))
+(deftransform ash-left-mod32 ((integer count)
+ ((unsigned-byte 32) (unsigned-byte 5)))
+ (when (sb!c::constant-lvar-p count)
+ (sb!c::give-up-ir1-transform))
+ '(%primitive fast-ash-left-mod32/unsigned=>unsigned integer count))
+
+;;; logical operations
+(define-modular-fun lognot-mod32 (x) lognot :untagged nil 32)
+(define-vop (lognot-mod32/unsigned=>unsigned)
+ (:translate lognot-mod32)
+ (:args (x :scs (unsigned-reg)))
+ (:arg-types unsigned-num)
+ (:results (r :scs (unsigned-reg)))
+ (:result-types unsigned-num)
+ (:policy :fast-safe)
+ (:generator 1
+ (inst nor r x zero-tn)))
+
+(define-modular-fun lognor-mod32 (x y) lognor :untagged nil 32)
+(define-vop (fast-lognor-mod32/unsigned=>unsigned
+ fast-lognor/unsigned=>unsigned)
+ (:translate lognor-mod32))
+
+(define-source-transform logeqv (&rest args)
+ (if (oddp (length args))
+ `(logxor ,@args)
+ `(lognot (logxor ,@args))))
+(define-source-transform logandc1 (x y)
+ `(logand (lognot ,x) ,y))
+(define-source-transform logandc2 (x y)
+ `(logand ,x (lognot ,y)))
+(define-source-transform logorc1 (x y)
+ `(logior (lognot ,x) ,y))
+(define-source-transform logorc2 (x y)
+ `(logior ,x (lognot ,y)))
+(define-source-transform lognand (x y)
+ `(lognot (logand ,x ,y)))