-;;;
-;;; Converted by William Lott.
-;;;
-
-(in-package "SB!VM")
+;;;; the VM definition arithmetic VOPs for the PPC
+;;;; 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.
(:effects)
(:affected))
-
(define-vop (fixnum-unop fast-safe-arith-op)
(:args (x :scs (any-reg)))
(:results (res :scs (any-reg)))
(:translate lognot)
(:generator 1
(inst not res x)))
-
-
\f
;;;; Binary fixnum operations.
(:result-types signed-num)
(:note "inline (signed-byte 32) arithmetic"))
-
(define-vop (fast-fixnum-binop-c fast-safe-arith-op)
(:args (x :target r :scs (any-reg zero)))
(:info y)
fixnum-additive-overflow-trap))
(emit-label no-overflow))))
+(define-vop (fast-*/fixnum=>fixnum fast-fixnum-binop)
+ (:temporary (:scs (non-descriptor-reg)) temp)
+ (:translate *)
+ (:generator 2
+ (inst srawi temp y 2)
+ (inst mullw r x temp)))
+
+(define-vop (fast-*-c/fixnum=>fixnum fast-fixnum-binop-c)
+ (:translate *)
+ (:arg-types tagged-num
+ (:constant (and (signed-byte 16) (not (integer 0 0)))))
+ (:generator 1
+ (inst mulli r x y)))
+
+(define-vop (fast-*-bigc/fixnum=>fixnum fast-fixnum-binop-c)
+ (:translate *)
+ (:arg-types tagged-num
+ (:constant (and fixnum (not (signed-byte 16)))))
+ (:temporary (:scs (non-descriptor-reg)) temp)
+ (:generator 1
+ (inst lr temp y)
+ (inst mullw r x temp)))
+
+(define-vop (fast-*/signed=>signed fast-signed-binop)
+ (:translate *)
+ (:generator 4
+ (inst mullw r x y)))
+(define-vop (fast-*-c/signed=>signed fast-signed-binop-c)
+ (:translate *)
+ (:generator 3
+ (inst mulli r x y)))
+
+(define-vop (fast-*/unsigned=>unsigned fast-unsigned-binop)
+ (:translate *)
+ (:generator 4
+ (inst mullw r x y)))
+
+(define-vop (fast-*-c/unsigned=>unsigned fast-unsigned-binop-c)
+ (:translate *)
+ (:generator 3
+ (inst mulli r x y)))
+\f
;;; Shifting
+(macrolet ((def (name sc-type type result-type cost)
+ `(define-vop (,name)
+ (:note "inline ASH")
+ (:translate ash)
+ (:args (number :scs (,sc-type))
+ (amount :scs (signed-reg unsigned-reg immediate)))
+ (:arg-types ,type positive-fixnum)
+ (:results (result :scs (,result-type)))
+ (:result-types ,type)
+ (:policy :fast-safe)
+ (:generator ,cost
+ (sc-case amount
+ ((signed-reg unsigned-reg)
+ (inst slw result number amount))
+ (immediate
+ (let ((amount (tn-value amount)))
+ (aver (> amount 0))
+ (inst slwi result number amount))))))))
+ ;; FIXME: There's the opportunity for a sneaky optimization here, I
+ ;; think: a FAST-ASH-LEFT-C/FIXNUM=>SIGNED vop. -- CSR, 2003-09-03
+ (def fast-ash-left/fixnum=>fixnum any-reg tagged-num any-reg 2)
+ (def fast-ash-left/signed=>signed signed-reg signed-num signed-reg 3)
+ (def fast-ash-left/unsigned=>unsigned unsigned-reg unsigned-num unsigned-reg 3))
+
(define-vop (fast-ash/unsigned=>unsigned)
(:note "inline ASH")
(:args (number :scs (unsigned-reg) :to :save)
(inst cmpwi ndesc 31)
(inst srw result number ndesc)
(inst ble done)
- (inst srwi result number 31)
+ (move result zero-tn)
(inst b done)
(emit-label positive)
(inst slw result number amount)
(emit-label done)))
-
(immediate
(let ((amount (tn-value amount)))
- (if (minusp amount)
- (let ((amount (min 31 (- amount))))
- (inst srwi result number amount))
- (inst slwi result number amount)))))))
-
+ (cond
+ ((and (minusp amount) (< amount -31)) (move result zero-tn))
+ ((minusp amount) (inst srwi result number (- amount)))
+ (t (inst slwi result number amount))))))))
(define-vop (fast-ash/signed=>signed)
(:note "inline ASH")
(:affected)
(:policy :fast-safe))
-(deftype integer-with-a-bite-out (s bite)
- (cond ((eq s '*) 'integer)
- ((and (integerp s) (> s 1))
- (let ((bound (ash 1 (1- s))))
- `(integer ,(- bound) ,(- bound bite 1))))
- (t
- (error "Bad size specified for SIGNED-BYTE type specifier: ~S." s))))
-
(define-vop (fast-conditional/fixnum fast-conditional)
(:args (x :scs (any-reg zero))
(y :scs (any-reg zero)))
(define-vop (bignum-mult)
(:translate sb!bignum::%multiply)
(:policy :fast-safe)
- (:args (x :scs (unsigned-reg) :to (:result 1))
- (y :scs (unsigned-reg) :to (:result 1)))
+ (:args (x :scs (unsigned-reg) :to (:eval 1))
+ (y :scs (unsigned-reg) :to (:eval 1)))
(:arg-types unsigned-num unsigned-num)
- (:results (hi :scs (unsigned-reg))
- (lo :scs (unsigned-reg)))
+ (:results (hi :scs (unsigned-reg) :from (:eval 1))
+ (lo :scs (unsigned-reg) :from (:eval 0)))
(:result-types unsigned-num unsigned-num)
(:generator 40
(inst mullw lo x y)
(define-static-fun two-arg-and (x y) :translate logand)
(define-static-fun two-arg-ior (x y) :translate logior)
(define-static-fun two-arg-xor (x y) :translate logxor)
+\f
+(in-package "SB!C")
+
+(deftransform * ((x y)
+ ((unsigned-byte 32) (constant-arg (unsigned-byte 32)))
+ (unsigned-byte 32))
+ "recode as shifts and adds"
+ (let ((y (lvar-value y)))
+ (multiple-value-bind (result adds shifts)
+ (ub32-strength-reduce-constant-multiply 'x y)
+ (cond
+ ((typep y '(signed-byte 16))
+ ;; a mulli instruction has a latency of 5.
+ (when (> (+ adds shifts) 4)
+ (give-up-ir1-transform)))
+ (t
+ ;; a mullw instruction also has a latency of 5, plus two
+ ;; instructions (in general) to load the immediate into a
+ ;; register.
+ (when (> (+ adds shifts) 6)
+ (give-up-ir1-transform))))
+ (or result 0))))
projects / sbcl.git / blobdiff