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;;;; the VM definition arithmetic VOPs for the Alpha
;;;; 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")
;;;; unary operations
(define-vop (fixnum-unop)
(:args (x :scs (any-reg)))
(:results (res :scs (any-reg)))
(:note "inline fixnum arithmetic")
(:arg-types tagged-num)
(:result-types tagged-num)
(:policy :fast-safe))
(define-vop (signed-unop)
(:args (x :scs (signed-reg)))
(:results (res :scs (signed-reg)))
(:note "inline (signed-byte 64) arithmetic")
(:arg-types signed-num)
(:result-types signed-num)
(:policy :fast-safe))
(define-vop (fast-negate/fixnum fixnum-unop)
(:translate %negate)
(:generator 1
(inst subq zero-tn x res)))
(define-vop (fast-negate/signed signed-unop)
(:translate %negate)
(:generator 2
(inst subq zero-tn x res)))
(define-vop (fast-lognot/fixnum fixnum-unop)
(:translate lognot)
(:generator 2
(inst eqv x zero-tn res)))
(define-vop (fast-lognot/signed signed-unop)
(:translate lognot)
(:generator 1
(inst not x res)))
;;;; binary fixnum operations
;;; Assume that any constant operand is the second arg...
(define-vop (fast-fixnum-binop)
(:args (x :target r :scs (any-reg))
(y :target r :scs (any-reg)))
(:arg-types tagged-num tagged-num)
(:results (r :scs (any-reg)))
(:result-types tagged-num)
(:note "inline fixnum arithmetic")
(:effects)
(:affected)
(:policy :fast-safe))
(define-vop (fast-unsigned-binop)
(:args (x :target r :scs (unsigned-reg))
(y :target r :scs (unsigned-reg)))
(:arg-types unsigned-num unsigned-num)
(:results (r :scs (unsigned-reg)))
(:result-types unsigned-num)
(:note "inline (unsigned-byte 64) arithmetic")
(:effects)
(:affected)
(:policy :fast-safe))
(define-vop (fast-signed-binop)
(:args (x :target r :scs (signed-reg))
(y :target r :scs (signed-reg)))
(:arg-types signed-num signed-num)
(:results (r :scs (signed-reg)))
(:result-types signed-num)
(:note "inline (signed-byte 64) arithmetic")
(:effects)
(:affected)
(:policy :fast-safe))
(define-vop (fast-fixnum-c-binop fast-fixnum-binop)
(:args (x :target r :scs (any-reg)))
(:info y)
(:arg-types tagged-num (:constant integer)))
(define-vop (fast-signed-c-binop fast-signed-binop)
(:args (x :target r :scs (signed-reg)))
(:info y)
(:arg-types tagged-num (:constant integer)))
(define-vop (fast-unsigned-c-binop fast-unsigned-binop)
(:args (x :target r :scs (unsigned-reg)))
(:info y)
(:arg-types tagged-num (:constant integer)))
(defmacro define-binop (translate cost untagged-cost op
tagged-type untagged-type
&optional arg-swap restore-fixnum-mask)
`(progn
(define-vop (,(symbolicate "FAST-" translate "/FIXNUM=>FIXNUM")
fast-fixnum-binop)
,@(when restore-fixnum-mask
`((:temporary (:sc non-descriptor-reg) temp)))
(:args (x ,@(unless restore-fixnum-mask `(:target r)) :scs (any-reg))
(y ,@(unless restore-fixnum-mask `(:target r)) :scs (any-reg)))
(:translate ,translate)
(:generator ,(1+ cost)
,(if arg-swap
`(inst ,op y x ,(if restore-fixnum-mask 'temp 'r))
`(inst ,op x y ,(if restore-fixnum-mask 'temp 'r)))
,@(when restore-fixnum-mask
`((inst bic temp #.(ash lowtag-mask -1) r)))))
(define-vop (,(symbolicate "FAST-" translate "/SIGNED=>SIGNED")
fast-signed-binop)
(:args (x :target r :scs (signed-reg))
(y :target r :scs (signed-reg)))
(:translate ,translate)
(:generator ,(1+ untagged-cost)
,(if arg-swap
`(inst ,op y x r)
`(inst ,op x y r))))
(define-vop (,(symbolicate "FAST-" translate "/UNSIGNED=>UNSIGNED")
fast-unsigned-binop)
(:args (x :target r :scs (unsigned-reg))
(y :target r :scs (unsigned-reg)))
(:translate ,translate)
(:generator ,(1+ untagged-cost)
,(if arg-swap
`(inst ,op y x r)
`(inst ,op x y r))))
,@(when (and tagged-type (not arg-swap))
`((define-vop (,(symbolicate "FAST-" translate "-C/FIXNUM=>FIXNUM")
fast-fixnum-c-binop)
(:arg-types tagged-num (:constant ,tagged-type))
,@(when restore-fixnum-mask
`((:temporary (:sc non-descriptor-reg) temp)))
(:translate ,translate)
(:generator ,cost
(inst ,op x (fixnumize y) ,(if restore-fixnum-mask 'temp 'r))
,@(when restore-fixnum-mask
`((inst bic temp #.(ash lowtag-mask -1) r)))))))
,@(when (and untagged-type (not arg-swap))
`((define-vop (,(symbolicate "FAST-" translate "-C/SIGNED=>SIGNED")
fast-signed-c-binop)
(:arg-types signed-num (:constant ,untagged-type))
(:translate ,translate)
(:generator ,untagged-cost
(inst ,op x y r)))
(define-vop (,(symbolicate "FAST-" translate
"-C/UNSIGNED=>UNSIGNED")
fast-unsigned-c-binop)
(:arg-types unsigned-num (:constant ,untagged-type))
(:translate ,translate)
(:generator ,untagged-cost
(inst ,op x y r)))))))
(define-binop + 1 5 addq (unsigned-byte 6) (unsigned-byte 8))
(define-binop - 1 5 subq (unsigned-byte 6) (unsigned-byte 8))
(define-binop logand 1 3 and (unsigned-byte 6) (unsigned-byte 8))
(define-binop logandc1 1 3 bic (unsigned-byte 6) (unsigned-byte 8) t)
(define-binop logandc2 1 3 bic (unsigned-byte 6) (unsigned-byte 8))
(define-binop logior 1 3 bis (unsigned-byte 6) (unsigned-byte 8))
(define-binop logorc1 1 3 ornot (unsigned-byte 6) (unsigned-byte 8) t t)
(define-binop logorc2 1 3 ornot (unsigned-byte 6) (unsigned-byte 8) nil t)
(define-binop logxor 1 3 xor (unsigned-byte 6) (unsigned-byte 8))
(define-binop logeqv 1 3 eqv (unsigned-byte 6) (unsigned-byte 8) nil t)
;;; special cases for LOGAND where we can use a mask operation
(define-vop (fast-logand-c-mask/unsigned=>unsigned fast-unsigned-c-binop)
(:translate logand)
(:arg-types unsigned-num
(:constant (or (integer #xffffffff #xffffffff)
(integer #xffffffff00000000 #xffffffff00000000))))
(:generator 1
(ecase y
(#xffffffff (inst mskll x 4 r))
(#xffffffff00000000 (inst mskll x 0 r)))))
;;;; shifting
(define-vop (fast-ash/unsigned=>unsigned)
(:note "inline ASH")
(:args (number :scs (unsigned-reg) :to :save)
(amount :scs (signed-reg)))
(: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)
(:temporary (:sc non-descriptor-reg) temp)
(:generator 3
(inst bge amount positive)
(inst subq zero-tn amount ndesc)
(inst cmplt ndesc 64 temp)
(inst srl number ndesc result)
;; FIXME: this looks like a candidate for a conditional move --
;; CSR, 2003-09-10
(inst bne temp done)
(move zero-tn result)
(inst br zero-tn done)
POSITIVE
(inst sll number amount result)
DONE))
(define-vop (fast-ash/signed=>signed)
(:note "inline ASH")
(:args (number :scs (signed-reg) :to :save)
(amount :scs (signed-reg)))
(: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)
(:temporary (:sc non-descriptor-reg) temp)
(:generator 3
(inst bge amount positive)
(inst subq zero-tn amount ndesc)
(inst cmplt ndesc 63 temp)
(inst sra number ndesc result)
(inst bne temp done)
(inst sra number 63 result)
(inst br zero-tn done)
POSITIVE
(inst sll number amount result)
DONE))
(define-vop (fast-ash-c/signed=>signed)
(:policy :fast-safe)
(:translate ash)
(:note nil)
(:args (number :scs (signed-reg)))
(:info count)
(:arg-types signed-num (:constant integer))
(:results (result :scs (signed-reg)))
(:result-types signed-num)
(:generator 1
(cond
((< count 0) (inst sra number (min 63 (- count)) result))
((> count 0) (inst sll number (min 63 count) result))
(t (bug "identity ASH not transformed away")))))
(define-vop (fast-ash-c/unsigned=>unsigned)
(:policy :fast-safe)
(:translate ash)
(:note nil)
(:args (number :scs (unsigned-reg)))
(:info count)
(:arg-types unsigned-num (:constant integer))
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 1
(cond
((< count -63) (move zero-tn result))
((< count 0) (inst sra number (- count) result))
((> count 0) (inst sll number (min 63 count) result))
(t (bug "identity ASH not transformed away")))))
(define-vop (signed-byte-64-len)
(:translate integer-length)
(:note "inline (signed-byte 64) integer-length")
(:policy :fast-safe)
(:args (arg :scs (signed-reg) :to (:argument 1)))
(:arg-types signed-num)
(:results (res :scs (any-reg)))
(:result-types positive-fixnum)
(:temporary (:scs (non-descriptor-reg) :from (:argument 0)) shift)
(:generator 30
(inst not arg shift)
(inst cmovge arg arg shift)
(inst subq zero-tn (fixnumize 1) res)
(inst sll shift 1 shift)
LOOP
(inst addq res (fixnumize 1) res)
(inst srl shift 1 shift)
(inst bne shift loop)))
(define-vop (unsigned-byte-64-count)
(:translate logcount)
(:note "inline (unsigned-byte 64) logcount")
(:policy :fast-safe)
(:args (arg :scs (unsigned-reg) :target num))
(:arg-types unsigned-num)
(:results (res :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:temporary (:scs (non-descriptor-reg) :from (:argument 0) :to (:result 0)
:target res) num)
(:temporary (:scs (non-descriptor-reg)) mask temp)
(:generator 60
;; FIXME: now this looks expensive, what with these 64bit loads.
;; Maybe a loop and count would be faster? -- CSR, 2003-09-10
(inst li #x5555555555555555 mask)
(inst srl arg 1 temp)
(inst and arg mask num)
(inst and temp mask temp)
(inst addq num temp num)
(inst li #x3333333333333333 mask)
(inst srl num 2 temp)
(inst and num mask num)
(inst and temp mask temp)
(inst addq num temp num)
(inst li #x0f0f0f0f0f0f0f0f mask)
(inst srl num 4 temp)
(inst and num mask num)
(inst and temp mask temp)
(inst addq num temp num)
(inst li #x00ff00ff00ff00ff mask)
(inst srl num 8 temp)
(inst and num mask num)
(inst and temp mask temp)
(inst addq num temp num)
(inst li #x0000ffff0000ffff mask)
(inst srl num 16 temp)
(inst and num mask num)
(inst and temp mask temp)
(inst addq num temp num)
(inst li #x00000000ffffffff mask)
(inst srl num 32 temp)
(inst and num mask num)
(inst and temp mask temp)
(inst addq num temp res)))
;;;; multiplying
(define-vop (fast-*/fixnum=>fixnum fast-fixnum-binop)
(:temporary (:scs (non-descriptor-reg)) temp)
(:translate *)
(:generator 4
(inst sra y 2 temp)
(inst mulq x temp r)))
(define-vop (fast-*/signed=>signed fast-signed-binop)
(:translate *)
(:generator 3
(inst mulq x y r)))
(define-vop (fast-*/unsigned=>unsigned fast-unsigned-binop)
(:translate *)
(:generator 3
(inst mulq x y r)))
;;;; Modular functions:
(define-modular-fun lognot-mod64 (x) lognot 64)
(define-vop (lognot-mod64/unsigned=>unsigned)
(:translate lognot-mod64)
(:args (x :scs (unsigned-reg)))
(:arg-types unsigned-num)
(:results (res :scs (unsigned-reg)))
(:result-types unsigned-num)
(:policy :fast-safe)
(:generator 1
(inst not x res)))
(macrolet
((define-modular-backend (fun &optional constantp)
(let ((mfun-name (symbolicate fun '-mod64))
(modvop (symbolicate 'fast- fun '-mod64/unsigned=>unsigned))
(modcvop (symbolicate 'fast- fun 'mod64-c/unsigned=>unsigned))
(vop (symbolicate 'fast- fun '/unsigned=>unsigned))
(cvop (symbolicate 'fast- fun '-c/unsigned=>unsigned)))
`(progn
(define-modular-fun ,mfun-name (x y) ,fun 64)
(define-vop (,modvop ,vop)
(:translate ,mfun-name))
,@(when constantp
`((define-vop (,modcvop ,cvop)
(:translate ,mfun-name))))))))
(define-modular-backend + t)
(define-modular-backend logxor t)
(define-modular-backend logeqv t)
(define-modular-backend logandc1)
(define-modular-backend logandc2 t)
(define-modular-backend logorc1)
(define-modular-backend logorc2 t))
(define-source-transform lognand (x y)
`(lognot (logand ,x ,y)))
(define-source-transform lognor (x y)
`(lognot (logior ,x ,y)))
;;;; binary conditional VOPs
(define-vop (fast-conditional)
(:conditional)
(:info target not-p)
(:effects)
(:affected)
(:temporary (:scs (non-descriptor-reg)) temp)
(:policy :fast-safe))
(define-vop (fast-conditional/fixnum fast-conditional)
(:args (x :scs (any-reg))
(y :scs (any-reg)))
(:arg-types tagged-num tagged-num)
(:note "inline fixnum comparison"))
(define-vop (fast-conditional-c/fixnum fast-conditional/fixnum)
(:args (x :scs (any-reg)))
(:arg-types tagged-num (:constant (unsigned-byte-with-a-bite-out 6 4)))
(:info target not-p y))
(define-vop (fast-conditional/signed fast-conditional)
(:args (x :scs (signed-reg))
(y :scs (signed-reg)))
(:arg-types signed-num signed-num)
(:note "inline (signed-byte 64) comparison"))
(define-vop (fast-conditional-c/signed fast-conditional/signed)
(:args (x :scs (signed-reg)))
(:arg-types signed-num (:constant (unsigned-byte-with-a-bite-out 8 1)))
(:info target not-p y))
(define-vop (fast-conditional/unsigned fast-conditional)
(:args (x :scs (unsigned-reg))
(y :scs (unsigned-reg)))
(:arg-types unsigned-num unsigned-num)
(:note "inline (unsigned-byte 64) comparison"))
(define-vop (fast-conditional-c/unsigned fast-conditional/unsigned)
(:args (x :scs (unsigned-reg)))
(:arg-types unsigned-num (:constant (unsigned-byte-with-a-bite-out 8 1)))
(:info target not-p y))
(defmacro define-conditional-vop (translate &rest generator)
`(progn
,@(mapcar (lambda (suffix cost signed)
(unless (and (member suffix '(/fixnum -c/fixnum))
(eq translate 'eql))
`(define-vop (,(intern (format nil "~:@(FAST-IF-~A~A~)"
translate suffix))
,(intern
(format nil "~:@(FAST-CONDITIONAL~A~)"
suffix)))
(:translate ,translate)
(:generator ,cost
(let* ((signed ,signed)
(-c/fixnum ,(eq suffix '-c/fixnum))
(y (if -c/fixnum (fixnumize y) y)))
,@generator)))))
'(/fixnum -c/fixnum /signed -c/signed /unsigned -c/unsigned)
'(3 2 5 4 5 4)
'(t t t t nil nil))))
(define-conditional-vop <
(cond ((and signed (eql y 0))
(if not-p
(inst bge x target)
(inst blt x target)))
(t
(if signed
(inst cmplt x y temp)
(inst cmpult x y temp))
(if not-p
(inst beq temp target)
(inst bne temp target)))))
(define-conditional-vop >
(cond ((and signed (eql y 0))
(if not-p
(inst ble x target)
(inst bgt x target)))
((integerp y)
(let ((y (+ y (if -c/fixnum (fixnumize 1) 1))))
(if signed
(inst cmplt x y temp)
(inst cmpult x y temp))
(if not-p
(inst bne temp target)
(inst beq temp target))))
(t
(if signed
(inst cmplt y x temp)
(inst cmpult y x temp))
(if not-p
(inst beq temp target)
(inst bne temp target)))))
;;; EQL/FIXNUM is funny because the first arg can be of any type, not
;;; just a known fixnum.
(define-conditional-vop eql
(declare (ignore signed))
(when (integerp y)
(inst li y temp)
(setf y temp))
(inst cmpeq x y temp)
(if not-p
(inst beq temp target)
(inst bne temp target)))
;;; These versions specify a fixnum restriction on their first arg. We
;;; have also generic-eql/fixnum VOPs which are the same, but have no
;;; restriction on the first arg and a higher cost. The reason for
;;; doing this is to prevent fixnum specific operations from being
;;; used on word integers, spuriously consing the argument.
(define-vop (fast-eql/fixnum fast-conditional)
(:args (x :scs (any-reg))
(y :scs (any-reg)))
(:arg-types tagged-num tagged-num)
(:note "inline fixnum comparison")
(:translate eql)
(:generator 3
(cond ((equal y zero-tn)
(if not-p
(inst bne x target)
(inst beq x target)))
(t
(inst cmpeq x y temp)
(if not-p
(inst beq temp target)
(inst bne temp target))))))
;;;
(define-vop (generic-eql/fixnum fast-eql/fixnum)
(:args (x :scs (any-reg descriptor-reg))
(y :scs (any-reg)))
(:arg-types * tagged-num)
(:variant-cost 7))
(define-vop (fast-eql-c/fixnum fast-conditional/fixnum)
(:args (x :scs (any-reg)))
(:arg-types tagged-num (:constant (signed-byte 6)))
(:temporary (:scs (non-descriptor-reg)) temp)
(:info target not-p y)
(:translate eql)
(:generator 2
(let ((y (cond ((eql y 0) zero-tn)
(t
(inst li (fixnumize y) temp)
temp))))
(inst cmpeq x y temp)
(if not-p
(inst beq temp target)
(inst bne temp target)))))
;;;
(define-vop (generic-eql-c/fixnum fast-eql-c/fixnum)
(:args (x :scs (any-reg descriptor-reg)))
(:arg-types * (:constant (signed-byte 6)))
(:variant-cost 6))
;;;; 32-bit logical operations
(define-vop (merge-bits)
(:translate merge-bits)
(:args (shift :scs (signed-reg unsigned-reg))
(prev :scs (unsigned-reg))
(next :scs (unsigned-reg)))
(:arg-types tagged-num unsigned-num unsigned-num)
(:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
(:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
(:results (result :scs (unsigned-reg)))
(:result-types unsigned-num)
(:policy :fast-safe)
(:generator 4
(let ((done (gen-label)))
(inst srl next shift res)
(inst beq shift done)
(inst subq zero-tn shift temp)
(inst sll prev temp temp)
(inst bis res temp res)
(emit-label done)
(move res result))))
(define-source-transform 32bit-logical-not (x)
`(logand (lognot (the (unsigned-byte 32) ,x)) #.(1- (ash 1 32))))
(deftransform 32bit-logical-and ((x y))
'(logand x y))
(define-source-transform 32bit-logical-nand (x y)
`(32bit-logical-not (32bit-logical-and ,x ,y)))
(deftransform 32bit-logical-or ((x y))
'(logior 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-xor ((x y))
'(logxor x y))
(define-source-transform 32bit-logical-eqv (x y)
`(logand (logeqv (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y))
#.(1- (ash 1 32))))
(define-source-transform 32bit-logical-orc1 (x y)
`(logand (logorc1 (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y))
#.(1- (ash 1 32))))
(define-source-transform 32bit-logical-orc2 (x y)
`(logand (logorc2 (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y))
#.(1- (ash 1 32))))
(define-source-transform 32bit-logical-andc1 (x y)
`(logandc1 (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y)))
(define-source-transform 32bit-logical-andc2 (x y)
`(logandc2 (the (unsigned-byte 32) ,x) (the (unsigned-byte 32) ,y)))
(define-vop (shift-towards-someplace)
(:policy :fast-safe)
(:args (num :scs (unsigned-reg))
(amount :scs (signed-reg)))
(:arg-types unsigned-num tagged-num)
(:results (r :scs (unsigned-reg)))
(:result-types unsigned-num))
(define-vop (shift-towards-start shift-towards-someplace)
(:translate shift-towards-start)
(:note "SHIFT-TOWARDS-START")
(:temporary (:sc non-descriptor-reg) temp)
(:generator 1
(inst and amount #x1f temp)
(inst srl num temp r)))
(define-vop (shift-towards-end shift-towards-someplace)
(:translate shift-towards-end)
(:note "SHIFT-TOWARDS-END")
(:temporary (:sc non-descriptor-reg) temp)
(:generator 1
(inst and amount #x1f temp)
(inst sll num temp r)))
;;;; bignum stuff
(define-vop (bignum-length get-header-data)
(:translate sb!bignum::%bignum-length)
(:policy :fast-safe))
(define-vop (bignum-set-length set-header-data)
(:translate sb!bignum::%bignum-set-length)
(:policy :fast-safe))
(define-full-reffer bignum-ref * bignum-digits-offset other-pointer-lowtag
(unsigned-reg) unsigned-num sb!bignum::%bignum-ref)
(define-full-setter bignum-set * bignum-digits-offset other-pointer-lowtag
(unsigned-reg) unsigned-num sb!bignum::%bignum-set #!+gengc nil)
(define-vop (digit-0-or-plus)
(:translate sb!bignum::%digit-0-or-plusp)
(:policy :fast-safe)
(:args (digit :scs (unsigned-reg)))
(:arg-types unsigned-num)
(:temporary (:sc non-descriptor-reg) temp)
(:conditional)
(:info target not-p)
(:generator 2
(inst sll digit 32 temp)
(if not-p
(inst blt temp target)
(inst bge temp target))))
(define-vop (add-w/carry)
(:translate sb!bignum::%add-with-carry)
(:policy :fast-safe)
(:args (a :scs (unsigned-reg))
(b :scs (unsigned-reg))
(c :scs (unsigned-reg)))
(:arg-types unsigned-num unsigned-num positive-fixnum)
(:results (result :scs (unsigned-reg) :from :load)
(carry :scs (unsigned-reg) :from :eval))
(:result-types unsigned-num positive-fixnum)
(:generator 5
(inst addq a b result)
(inst addq result c result)
(inst sra result 32 carry)
(inst mskll result 4 result)))
(define-vop (sub-w/borrow)
(:translate sb!bignum::%subtract-with-borrow)
(:policy :fast-safe)
(:args (a :scs (unsigned-reg))
(b :scs (unsigned-reg))
(c :scs (unsigned-reg)))
(:arg-types unsigned-num unsigned-num positive-fixnum)
(:results (result :scs (unsigned-reg) :from :load)
(borrow :scs (unsigned-reg) :from :eval))
(:result-types unsigned-num positive-fixnum)
(:generator 4
(inst xor c 1 result)
(inst subq a result result)
(inst subq result b result)
(inst srl result 63 borrow)
(inst xor borrow 1 borrow)
(inst mskll result 4 result)))
(define-vop (bignum-mult-and-add-3-arg)
(:translate sb!bignum::%multiply-and-add)
(:policy :fast-safe)
(:args (x :scs (unsigned-reg))
(y :scs (unsigned-reg))
(carry-in :scs (unsigned-reg) :to :save))
(:arg-types unsigned-num unsigned-num unsigned-num)
(:results (hi :scs (unsigned-reg))
(lo :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:generator 6
(inst mulq x y lo)
(inst addq lo carry-in lo)
(inst srl lo 32 hi)
(inst mskll lo 4 lo)))
(define-vop (bignum-mult-and-add-4-arg)
(:translate sb!bignum::%multiply-and-add)
(:policy :fast-safe)
(:args (x :scs (unsigned-reg))
(y :scs (unsigned-reg))
(prev :scs (unsigned-reg))
(carry-in :scs (unsigned-reg) :to :save))
(:arg-types unsigned-num unsigned-num unsigned-num unsigned-num)
(:results (hi :scs (unsigned-reg))
(lo :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:generator 9
(inst mulq x y lo)
(inst addq lo prev lo)
(inst addq lo carry-in lo)
(inst srl lo 32 hi)
(inst mskll lo 4 lo)))
(define-vop (bignum-mult)
(:translate sb!bignum::%multiply)
(:policy :fast-safe)
(:args (x :scs (unsigned-reg))
(y :scs (unsigned-reg)))
(:arg-types unsigned-num unsigned-num)
(:results (hi :scs (unsigned-reg))
(lo :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:generator 3
(inst mulq x y lo)
(inst srl lo 32 hi)
(inst mskll lo 4 lo)))
(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 not x r)
(inst mskll r 4 r)))
(define-vop (fixnum-to-digit)
(:translate sb!bignum::%fixnum-to-digit)
(:policy :fast-safe)
(:args (fixnum :scs (any-reg)))
(:arg-types tagged-num)
(:results (digit :scs (unsigned-reg)))
(:result-types unsigned-num)
(:generator 1
(inst sra fixnum 2 digit)))
(define-vop (bignum-floor)
(:translate sb!bignum::%floor)
(:policy :fast-safe)
(:args (num-high :scs (unsigned-reg))
(num-low :scs (unsigned-reg))
(denom-arg :scs (unsigned-reg) :target denom))
(:arg-types unsigned-num unsigned-num unsigned-num)
(:temporary (:scs (unsigned-reg) :from (:argument 2)) denom)
(:temporary (:scs (unsigned-reg) :from (:eval 0)) temp)
(:results (quo :scs (unsigned-reg) :from (:eval 0))
(rem :scs (unsigned-reg) :from (:argument 0)))
(:result-types unsigned-num unsigned-num)
(:generator 325 ; number of inst assuming targeting works.
(inst sll num-high 32 rem)
(inst bis rem num-low rem)
(inst sll denom-arg 32 denom)
(inst cmpule denom rem quo)
(inst beq quo shift1)
(inst subq rem denom rem)
SHIFT1
(dotimes (i 32)
(let ((shift2 (gen-label)))
(inst srl denom 1 denom)
(inst cmpule denom rem temp)
(inst sll quo 1 quo)
(inst beq temp shift2)
(inst subq rem denom rem)
(inst bis quo 1 quo)
(emit-label shift2)))))
(define-vop (signify-digit)
(:translate sb!bignum::%fixnum-digit-with-correct-sign)
(:policy :fast-safe)
(:args (digit :scs (unsigned-reg) :target res))
(:arg-types unsigned-num)
(:results (res :scs (any-reg signed-reg)))
(:result-types signed-num)
(:generator 2
(sc-case res
(any-reg
(inst sll digit 34 res)
(inst sra res 32 res))
(signed-reg
(inst sll digit 32 res)
(inst sra res 32 res)))))
(define-vop (digit-ashr)
(:translate sb!bignum::%ashr)
(:policy :fast-safe)
(:args (digit :scs (unsigned-reg))
(count :scs (unsigned-reg)))
(:arg-types unsigned-num positive-fixnum)
(:results (result :scs (unsigned-reg) :from (:argument 0)))
(:result-types unsigned-num)
(:generator 1
(inst sll digit 32 result)
(inst sra result count result)
(inst srl result 32 result)))
(define-vop (digit-lshr digit-ashr)
(:translate sb!bignum::%digit-logical-shift-right)
(:generator 1
(inst srl digit count result)))
(define-vop (digit-ashl digit-ashr)
(:translate sb!bignum::%ashl)
(:generator 1
(inst sll digit count result)))
;;;; static functions
(define-static-fun two-arg-gcd (x y) :translate gcd)
(define-static-fun two-arg-lcm (x y) :translate lcm)
(define-static-fun two-arg-+ (x y) :translate +)
(define-static-fun two-arg-- (x y) :translate -)
(define-static-fun two-arg-* (x y) :translate *)
(define-static-fun two-arg-/ (x y) :translate /)
(define-static-fun two-arg-< (x y) :translate <)
(define-static-fun two-arg-<= (x y) :translate <=)
(define-static-fun two-arg-> (x y) :translate >)
(define-static-fun two-arg->= (x y) :translate >=)
(define-static-fun two-arg-= (x y) :translate =)
(define-static-fun two-arg-/= (x y) :translate /=)
(define-static-fun %negate (x) :translate %negate)
(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)
(define-static-fun two-arg-eqv (x y) :translate logeqv)