-;;;; the VM definition arithmetic VOPs for the Alpha
+;;;; the VM definition arithmetic VOPs for the SPARC
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;; Shifting
-(macrolet
- ((frob (name sc-type type shift-right-inst)
- `(define-vop (,name)
- (:note "inline ASH")
- (:args (number :scs (,sc-type) :to :save)
- (amount :scs (signed-reg immediate)))
- (:arg-types ,type signed-num)
- (:results (result :scs (,sc-type)))
- (:result-types ,type)
- (:translate ash)
- (:policy :fast-safe)
- (:temporary (:sc non-descriptor-reg) ndesc)
- (:generator 5
- (sc-case amount
- (signed-reg
- (cond
- ;; FIXME: These two don't look different enough.
- ((member :sparc-v9 *backend-subfeatures*)
- (let ((done (gen-label))
- (positive (gen-label)))
- (inst cmp amount)
- (inst b :ge positive)
- (inst neg ndesc amount)
- ;; ndesc = max(-amount, 31)
- (inst cmp ndesc 31)
- (inst cmove :ge ndesc 31)
- (inst b done)
- (inst ,shift-right-inst result number ndesc)
- (emit-label positive)
- ;; The result-type assures us that this shift will
- ;; not overflow.
- (inst sll result number amount)
- ;; We want a right shift of the appropriate size.
- (emit-label done)))
- (t
- (let ((positive (gen-label))
- (done (gen-label)))
- (inst cmp amount)
- (inst b :ge positive)
- (inst neg ndesc amount)
- (inst cmp ndesc 31)
- (inst b :le done)
- (inst ,shift-right-inst result number ndesc)
- (inst b done)
- (inst ,shift-right-inst result number 31)
- (emit-label positive)
- ;; The result-type assures us that this shift will
- ;; not overflow.
- (inst sll result number amount)
- (emit-label done)))))
- (immediate
- (let ((amount (tn-value amount)))
- (if (minusp amount)
- (let ((amount (min 31 (- amount))))
- (inst ,shift-right-inst result number amount))
- (inst sll result number amount)))))))))
- (frob fast-ash/signed=>signed signed-reg signed-num sra)
- (frob fast-ash/unsigned=>unsigned unsigned-reg unsigned-num srl))
+(define-vop (fast-ash/signed=>signed)
+ (:note "inline ASH")
+ (:args (number :scs (signed-reg) :to :save)
+ (amount :scs (signed-reg immediate) :to :save))
+ (:arg-types signed-num signed-num)
+ (:results (result :scs (signed-reg)))
+ (:result-types signed-num)
+ (:translate ash)
+ (:policy :fast-safe)
+ (:temporary (:sc non-descriptor-reg) ndesc)
+ (:generator 5
+ (sc-case amount
+ (signed-reg
+ (let ((done (gen-label)))
+ (inst cmp amount)
+ (inst b :ge done)
+ ;; The result-type assures us that this shift will not
+ ;; overflow.
+ (inst sll result number amount)
+ (inst neg ndesc amount)
+ (inst cmp ndesc 31)
+ (if (member :sparc-v9 *backend-subfeatures*)
+ (progn
+ (inst cmove :ge ndesc 31)
+ (inst sra result number ndesc))
+ (progn
+ (inst b :le done)
+ (inst sra result number ndesc)
+ (inst sra result number 31)))
+ (emit-label done)))
+ (immediate
+ (bug "IMMEDIATE case in ASH VOP; should have been transformed")))))
+
+(define-vop (fast-ash/unsigned=>unsigned)
+ (:note "inline ASH")
+ (:args (number :scs (unsigned-reg) :to :save)
+ (amount :scs (signed-reg immediate) :to :save))
+ (:arg-types unsigned-num signed-num)
+ (:results (result :scs (unsigned-reg)))
+ (:result-types unsigned-num)
+ (:translate ash)
+ (:policy :fast-safe)
+ (:temporary (:sc non-descriptor-reg) ndesc)
+ (:generator 5
+ (sc-case amount
+ (signed-reg
+ (let ((done (gen-label)))
+ (inst cmp amount)
+ (inst b :ge done)
+ ;; The result-type assures us that this shift will not
+ ;; overflow.
+ (inst sll result number amount)
+ (inst neg ndesc amount)
+ (inst cmp ndesc 32)
+ (if (member :sparc-v9 *backend-subfeatures*)
+ (progn
+ (inst srl result number ndesc)
+ (inst cmove :ge result zero-tn))
+ (progn
+ (inst b :lt done)
+ (inst srl result number ndesc)
+ (move result zero-tn)))
+ (emit-label done)))
+ (immediate
+ (bug "IMMEDIATE case in ASH VOP; should have been transformed")))))
;; Some special cases where we know we want a left shift. Just do the
;; shift, instead of checking for the sign of the shift.
(:policy :fast-safe)
(:generator ,cost
;; The result-type assures us that this shift will not
- ;; overflow. And for fixnum's, the zero bits that get
+ ;; overflow. And for fixnums, the zero bits that get
;; shifted in are just fine for the fixnum tag.
(sc-case amount
((signed-reg unsigned-reg)
(inst sra temp y n-fixnum-tag-bits)
(inst smul r x temp)))
+(define-vop (fast-v8-*-c/fixnum=>fixnum fast-safe-arith-op)
+ (:args (x :target r :scs (any-reg zero)))
+ (:info y)
+ (:arg-types tagged-num
+ (:constant (and (signed-byte 13) (not (integer 0 0)))))
+ (:results (r :scs (any-reg)))
+ (:result-types tagged-num)
+ (:note "inline fixnum arithmetic")
+ (:translate *)
+ (:guard (or (member :sparc-v8 *backend-subfeatures*)
+ (and (member :sparc-v9 *backend-subfeatures*)
+ (not (member :sparc-64 *backend-subfeatures*)))))
+ (:generator 1
+ (inst smul r x y)))
+
(define-vop (fast-v8-*/signed=>signed fast-signed-binop)
(:translate *)
(:guard (or (member :sparc-v8 *backend-subfeatures*)
(:generator 3
(inst smul r x y)))
+(define-vop (fast-v8-*-c/signed=>signed fast-signed-binop-c)
+ (:translate *)
+ (:guard (or (member :sparc-v8 *backend-subfeatures*)
+ (and (member :sparc-v9 *backend-subfeatures*)
+ (not (member :sparc-64 *backend-subfeatures*)))))
+ (:generator 2
+ (inst smul r x y)))
+
(define-vop (fast-v8-*/unsigned=>unsigned fast-unsigned-binop)
(:translate *)
(:guard (or (member :sparc-v8 *backend-subfeatures*)
(:generator 3
(inst umul r x y)))
+(define-vop (fast-v8-*-c/unsigned=>unsigned fast-unsigned-binop-c)
+ (:translate *)
+ (:guard (or (member :sparc-v8 *backend-subfeatures*)
+ (and (member :sparc-v9 *backend-subfeatures*)
+ (not (member :sparc-64 *backend-subfeatures*)))))
+ (:generator 2
+ (inst umul r x y)))
+
;; The smul and umul instructions are deprecated on the Sparc V9. Use
;; mulx instead.
(define-vop (fast-v9-*/fixnum=>fixnum fast-fixnum-binop)
(defun ash-right-unsigned (num shuft)
(ash-right-unsigned num shift)))
+(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
+ ;; we assume, perhaps foolishly, that good SPARCs don't have an
+ ;; issue with multiplications. (Remember that there's a
+ ;; different transform for converting x*2^k to a shift).
+ ((member :sparc-64 *backend-subfeatures*) (give-up-ir1-transform))
+ ((or (member :sparc-v9 *backend-subfeatures*)
+ (member :sparc-v8 *backend-subfeatures*))
+ ;; breakeven point as measured by Raymond Toy
+ (when (> (+ adds shifts) 9)
+ (give-up-ir1-transform))))
+ (or result 0))))
+
;; If we can prove that we have a right shift, just do the right shift
;; instead of calling the inline ASH which has to check for the
;; direction of the shift at run-time.
-(in-package "SB!C")
-
(deftransform ash ((num shift) (integer integer))
- (let ((num-type (continuation-type num))
- (shift-type (continuation-type shift)))
+ (let ((num-type (lvar-type num))
+ (shift-type (lvar-type shift)))
;; Can only handle right shifts
(unless (csubtypep shift-type (specifier-type '(integer * 0)))
(give-up-ir1-transform))
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