-(in-package "SB!VM")
+;;;; the VM definition arithmetic VOPs for MIPS
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
+(in-package "SB!VM")
\f
;;;; Unary operations.
(integer #.(- (1- (ash 1 14))) #.(ash 1 14))
(integer #.(- (1- (ash 1 16))) #.(ash 1 16)))
(define-binop logior 1 3 or (unsigned-byte 14) (unsigned-byte 16))
-(define-binop lognor 1 3 nor nil nil)
(define-binop logand 1 3 and (unsigned-byte 14) (unsigned-byte 16))
(define-binop logxor 1 3 xor (unsigned-byte 14) (unsigned-byte 16))
+;;; KLUDGE: no FIXNUM VOP for LOGNOR, because there's no efficient way
+;;; of restoring the tag bits. (No -C/ VOPs for LOGNOR because the
+;;; NOR instruction doesn't take immediate args). -- CSR, 2003-09-11
+(define-vop (fast-lognor/signed=>signed fast-signed-binop)
+ (:translate lognor)
+ (:args (x :target r :scs (signed-reg))
+ (y :target r :scs (signed-reg)))
+ (:generator 4
+ (inst nor r x y)))
+(define-vop (fast-lognor/unsigned=>unsigned fast-unsigned-binop)
+ (:translate lognor)
+ (:args (x :target r :scs (unsigned-reg))
+ (y :target r :scs (unsigned-reg)))
+ (:generator 4
+ (inst nor r x y)))
+
;;; Special case fixnum + and - that trap on overflow. Useful when we don't
;;; know that the result is going to be a fixnum.
#+nil
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 1
- (cond ((< count 0)
- ;; It is a right shift.
- (inst srl result number (min (- count) 31)))
- ((> count 0)
- ;; It is a left shift.
- (inst sll result number (min count 31)))
- (t
- ;; Count=0? Shouldn't happen, but it's easy:
- (move result number)))))
+ (cond
+ ((< count -31) (move result zero-tn))
+ ((< count 0) (inst srl result number (min (- count) 31)))
+ ((> count 0) (inst sll result number (min count 31)))
+ (t (bug "identity ASH not transformed away")))))
(define-vop (fast-ash-c/signed=>signed)
(:policy :fast-safe)
(:results (result :scs (signed-reg)))
(:result-types signed-num)
(:generator 1
- (cond ((< count 0)
- ;; It is a right shift.
- (inst sra result number (min (- count) 31)))
- ((> count 0)
- ;; It is a left shift.
- (inst sll result number (min count 31)))
- (t
- ;; Count=0? Shouldn't happen, but it's easy:
- (move result number)))))
+ (cond
+ ((< count 0) (inst sra result number (min (- count) 31)))
+ ((> count 0) (inst sll result number (min count 31)))
+ (t (bug "identity ASH not transformed away")))))
(define-vop (signed-byte-32-len)
(:translate integer-length)
(emit-label done)
(move result res))))
+(define-source-transform 32bit-logical-not (x)
+ `(logand (lognot (the (unsigned-byte 32) ,x)) #.(1- (ash 1 32))))
-(define-vop (32bit-logical)
- (:args (x :scs (unsigned-reg))
- (y :scs (unsigned-reg)))
- (:arg-types unsigned-num unsigned-num)
- (:results (r :scs (unsigned-reg)))
- (:result-types unsigned-num)
- (:policy :fast-safe))
-
-(define-vop (32bit-logical-not 32bit-logical)
- (:translate 32bit-logical-not)
- (:args (x :scs (unsigned-reg)))
- (:arg-types unsigned-num)
- (:generator 1
- (inst nor r x zero-tn)))
-
-(define-vop (32bit-logical-and 32bit-logical)
- (:translate 32bit-logical-and)
- (:generator 1
- (inst and r x y)))
-
-(deftransform 32bit-logical-nand ((x y) (* *))
- '(32bit-logical-not (32bit-logical-and x y)))
+(deftransform 32bit-logical-and ((x y))
+ '(logand x y))
-(define-vop (32bit-logical-or 32bit-logical)
- (:translate 32bit-logical-or)
- (:generator 1
- (inst or r x y)))
+(define-source-transform 32bit-logical-nand (x y)
+ `(32bit-logical-not (32bit-logical-and ,x ,y)))
-(define-vop (32bit-logical-nor 32bit-logical)
- (:translate 32bit-logical-nor)
- (:generator 1
- (inst nor r x y)))
+(deftransform 32bit-logical-or ((x y))
+ '(logior x y))
-(define-vop (32bit-logical-xor 32bit-logical)
- (:translate 32bit-logical-xor)
- (:generator 1
- (inst xor r x y)))
+(define-source-transform 32bit-logical-nor (x y)
+ `(logand (lognor (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y))
+ #.(1- (ash 1 32))))
-(deftransform 32bit-logical-eqv ((x y) (* *))
- '(32bit-logical-not (32bit-logical-xor x y)))
+(deftransform 32bit-logical-xor ((x y))
+ '(logxor x y))
-(deftransform 32bit-logical-andc1 ((x y) (* *))
- '(32bit-logical-and (32bit-logical-not x) y))
+(define-source-transform 32bit-logical-eqv (x y)
+ `(32bit-logical-not (32bit-logical-xor ,x ,y)))
-(deftransform 32bit-logical-andc2 ((x y) (* *))
- '(32bit-logical-and x (32bit-logical-not y)))
+(define-source-transform 32bit-logical-orc1 (x y)
+ `(32bit-logical-or (32bit-logical-not ,x) ,y))
-(deftransform 32bit-logical-orc1 ((x y) (* *))
- '(32bit-logical-or (32bit-logical-not x) y))
+(define-source-transform 32bit-logical-orc2 (x y)
+ `(32bit-logical-or ,x (32bit-logical-not ,y)))
-(deftransform 32bit-logical-orc2 ((x y) (* *))
- '(32bit-logical-or x (32bit-logical-not y)))
+(define-source-transform 32bit-logical-andc1 (x y)
+ `(32bit-logical-and (32bit-logical-not ,x) ,y))
+(define-source-transform 32bit-logical-andc2 (x y)
+ `(32bit-logical-and ,x (32bit-logical-not ,y)))
(define-vop (shift-towards-someplace)
(:policy :fast-safe)
(inst srl r num amount))
(:little-endian
(inst sll r num amount)))))
-
-
\f
+;;;; Modular arithmetic
+(define-modular-fun +-mod32 (x y) + 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) - 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))
+
+;;; logical operations
+(define-modular-fun lognot-mod32 (x) lognot 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 logxor-mod32 (x y) logxor 32)
+(define-vop (fast-logxor-mod32/unsigned=>unsigned
+ fast-logxor/unsigned=>unsigned)
+ (:translate logxor-mod32))
+(define-vop (fast-logxor-mod32-c/unsigned=>unsigned
+ fast-logxor-c/unsigned=>unsigned)
+ (:translate logxor-mod32))
+
+(define-modular-fun lognor-mod32 (x y) lognor 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)))
;;;; Bignum stuff.
(define-vop (bignum-length get-header-data)
(inst mflo lo)
(inst mfhi hi)))
-(define-vop (bignum-lognot)
- (:translate sb!bignum::%lognot)
- (:policy :fast-safe)
- (:args (x :scs (unsigned-reg)))
- (:arg-types unsigned-num)
- (:results (r :scs (unsigned-reg)))
- (:result-types unsigned-num)
- (:generator 1
- (inst nor r x zero-tn)))
+(define-vop (bignum-lognot lognot-mod32/unsigned=>unsigned)
+ (:translate sb!bignum::%lognot))
(define-vop (fixnum-to-digit)
(:translate sb!bignum::%fixnum-to-digit)
projects / sbcl.git / blobdiff