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(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 32) arithmetic")
(:arg-types signed-num)
(:result-types signed-num)
(:policy :fast-safe))
(define-vop (fast-negate/fixnum fixnum-unop)
(:translate %negate)
(:generator 1
(inst subu res zero-tn x)))
(define-vop (fast-negate/signed signed-unop)
(:translate %negate)
(:generator 2
(inst subu res zero-tn x)))
(define-vop (fast-lognot/fixnum fixnum-unop)
(:temporary (:scs (any-reg) :type fixnum :to (:result 0))
temp)
(:translate lognot)
(:generator 2
(inst li temp (fixnumize -1))
(inst xor res x temp)))
(define-vop (fast-lognot/signed signed-unop)
(:translate lognot)
(:generator 1
(inst nor res x zero-tn)))
;;;; 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 32) 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 32) 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)
`(progn
(define-vop (,(symbolicate "FAST-" translate "/FIXNUM=>FIXNUM")
fast-fixnum-binop)
(:args (x :target r :scs (any-reg))
(y :target r :scs (any-reg)))
(:translate ,translate)
(:generator ,(1+ cost)
(inst ,op r x y)))
(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)
(inst ,op r x y)))
(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)
(inst ,op r x y)))
,@(when tagged-type
`((define-vop (,(symbolicate "FAST-" translate "-C/FIXNUM=>FIXNUM")
fast-fixnum-c-binop)
(:arg-types tagged-num (:constant ,tagged-type))
(:translate ,translate)
(:generator ,cost
(inst ,op r x (fixnumize y))))))
,@(when untagged-type
`((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 r x y)))
(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 r x y)))))))
(define-binop + 1 5 addu (signed-byte 14) (signed-byte 16))
(define-binop - 1 5 subu
(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))
;;; Special case fixnum + and - that trap on overflow. Useful when we don't
;;; know that the result is going to be a fixnum.
#+nil
(progn
(define-vop (fast-+/fixnum fast-+/fixnum=>fixnum)
(:results (r :scs (any-reg descriptor-reg)))
(:result-types (:or signed-num unsigned-num))
(:note nil)
(:generator 4
(inst add r x y)))
(define-vop (fast-+-c/fixnum fast-+-c/fixnum=>fixnum)
(:results (r :scs (any-reg descriptor-reg)))
(:result-types (:or signed-num unsigned-num))
(:note nil)
(:generator 3
(inst add r x (fixnumize y))))
(define-vop (fast--/fixnum fast--/fixnum=>fixnum)
(:results (r :scs (any-reg descriptor-reg)))
(:result-types (:or signed-num unsigned-num))
(:note nil)
(:generator 4
(inst sub r x y)))
(define-vop (fast---c/fixnum fast---c/fixnum=>fixnum)
(:results (r :scs (any-reg descriptor-reg)))
(:result-types (:or signed-num unsigned-num))
(:note nil)
(:generator 3
(inst sub r x (fixnumize y))))
) ; bogus trap-to-c-land +/-
;;; Shifting
(define-vop (fast-ash/unsigned=>unsigned)
(:note "inline ASH")
(:args (number :scs (unsigned-reg) :to :save)
(amount :scs (signed-reg) :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)
(:temporary (:sc non-descriptor-reg :to :eval) temp)
(:generator 3
(inst bgez amount positive)
(inst subu ndesc zero-tn amount)
(inst slt temp ndesc 32)
(inst bne temp zero-tn done)
(inst srl result number ndesc)
(inst b done)
(inst move result zero-tn)
POSITIVE
;; The result-type assures us that this shift will not overflow.
(inst sll result number amount)
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 :to :eval) temp)
(:generator 3
(inst bgez amount positive)
(inst subu ndesc zero-tn amount)
(inst slt temp ndesc 31)
(inst bne temp zero-tn done)
(inst sra result number ndesc)
(inst b done)
(inst sra result number 31)
POSITIVE
;; The result-type assures us that this shift will not overflow.
(inst sll result number amount)
DONE))
(define-vop (fast-ash-c/unsigned=>unsigned)
(:policy :fast-safe)
(:translate ash)
(:note "inline ASH")
(: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 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)))))
(define-vop (fast-ash-c/signed=>signed)
(:policy :fast-safe)
(:translate ash)
(:note "inline ASH")
(: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)
;; 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)))))
(define-vop (signed-byte-32-len)
(:translate integer-length)
(:note "inline (signed-byte 32) integer-length")
(:policy :fast-safe)
(:args (arg :scs (signed-reg) :target shift))
(:arg-types signed-num)
(:results (res :scs (any-reg)))
(:result-types positive-fixnum)
(:temporary (:scs (non-descriptor-reg) :from (:argument 0)) shift)
(:generator 30
(let ((loop (gen-label))
(test (gen-label)))
(move shift arg)
(inst bgez shift test)
(move res zero-tn)
(inst b test)
(inst nor shift shift)
(emit-label loop)
(inst add res (fixnumize 1))
(emit-label test)
(inst bne shift loop)
(inst srl shift 1))))
(define-vop (unsigned-byte-32-count)
(:translate logcount)
(:note "inline (unsigned-byte 32) 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 30
(inst li mask #x55555555)
(inst srl temp arg 1)
(inst and num arg mask)
(inst and temp mask)
(inst addu num temp)
(inst li mask #x33333333)
(inst srl temp num 2)
(inst and num mask)
(inst and temp mask)
(inst addu num temp)
(inst li mask #x0f0f0f0f)
(inst srl temp num 4)
(inst and num mask)
(inst and temp mask)
(inst addu num temp)
(inst li mask #x00ff00ff)
(inst srl temp num 8)
(inst and num mask)
(inst and temp mask)
(inst addu num temp)
(inst li mask #x0000ffff)
(inst srl temp num 16)
(inst and num mask)
(inst and temp mask)
(inst addu res num temp)))
;;; Multiply and Divide.
(define-vop (fast-*/fixnum=>fixnum fast-fixnum-binop)
(:temporary (:scs (non-descriptor-reg)) temp)
(:translate *)
(:generator 4
(inst sra temp y 2)
(inst mult x temp)
(inst mflo r)))
(define-vop (fast-*/signed=>signed fast-signed-binop)
(:translate *)
(:generator 3
(inst mult x y)
(inst mflo r)))
(define-vop (fast-*/unsigned=>unsigned fast-unsigned-binop)
(:translate *)
(:generator 3
(inst multu x y)
(inst mflo r)))
(define-vop (fast-truncate/fixnum fast-fixnum-binop)
(:translate truncate)
(:results (q :scs (any-reg))
(r :scs (any-reg)))
(:result-types tagged-num tagged-num)
(:temporary (:scs (non-descriptor-reg) :to :eval) temp)
(:vop-var vop)
(:save-p :compute-only)
(:generator 11
(let ((zero (generate-error-code vop division-by-zero-error x y)))
(inst beq y zero-tn zero))
(inst nop)
(inst div x y)
(inst mflo temp)
(inst sll q temp 2)
(inst mfhi r)))
(define-vop (fast-truncate/unsigned fast-unsigned-binop)
(:translate truncate)
(:results (q :scs (unsigned-reg))
(r :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:vop-var vop)
(:save-p :compute-only)
(:generator 12
(let ((zero (generate-error-code vop division-by-zero-error x y)))
(inst beq y zero-tn zero))
(inst nop)
(inst divu x y)
(inst mflo q)
(inst mfhi r)))
(define-vop (fast-truncate/signed fast-signed-binop)
(:translate truncate)
(:results (q :scs (signed-reg))
(r :scs (signed-reg)))
(:result-types signed-num signed-num)
(:vop-var vop)
(:save-p :compute-only)
(:generator 12
(let ((zero (generate-error-code vop division-by-zero-error x y)))
(inst beq y zero-tn zero))
(inst nop)
(inst div x y)
(inst mflo q)
(inst mfhi r)))
;;;; 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 (signed-byte-with-a-bite-out 14 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 32) comparison"))
(define-vop (fast-conditional-c/signed fast-conditional/signed)
(:args (x :scs (signed-reg)))
(:arg-types signed-num (:constant (signed-byte-with-a-bite-out 16 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 32) comparison"))
(define-vop (fast-conditional-c/unsigned fast-conditional/unsigned)
(:args (x :scs (unsigned-reg)))
(:arg-types unsigned-num (:constant (and (signed-byte-with-a-bite-out 16 1)
unsigned-byte)))
(: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)))
(declare (ignorable signed -c/fixnum 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 bgez x target)
(inst bltz x target)))
(t
(if signed
(inst slt temp x y)
(inst sltu temp x y))
(if not-p
(inst beq temp zero-tn target)
(inst bne temp zero-tn target))))
(inst nop))
(define-conditional-vop >
(cond ((and signed (eql y 0))
(if not-p
(inst blez x target)
(inst bgtz x target)))
((integerp y)
(let ((y (+ y (if -c/fixnum (fixnumize 1) 1))))
(if signed
(inst slt temp x y)
(inst sltu temp x y))
(if not-p
(inst bne temp zero-tn target)
(inst beq temp zero-tn target))))
(t
(if signed
(inst slt temp y x)
(inst sltu temp y x))
(if not-p
(inst beq temp zero-tn target)
(inst bne temp zero-tn target))))
(inst nop))
;;; 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 temp y)
(setf y temp))
(if not-p
(inst bne x y target)
(inst beq x y target))
(inst nop))
;;; 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)
(:ignore temp)
(:generator 3
(if not-p
(inst bne x y target)
(inst beq x y target))
(inst nop)))
;;;
(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 14)))
(:info target not-p y)
(:translate eql)
(:generator 2
(let ((y (cond ((eql y 0) zero-tn)
(t
(inst li temp (fixnumize y))
temp))))
(if not-p
(inst bne x y target)
(inst beq x y target))
(inst nop))))
;;;
(define-vop (generic-eql-c/fixnum fast-eql-c/fixnum)
(:args (x :scs (any-reg descriptor-reg)))
(:arg-types * (:constant (signed-byte 14)))
(: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 beq shift done)
(inst srl res next shift)
(inst subu temp zero-tn shift)
(inst sll temp prev temp)
(inst or res res temp)
(emit-label done)
(move result res))))
(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)))
(define-vop (32bit-logical-or 32bit-logical)
(:translate 32bit-logical-or)
(:generator 1
(inst or r x y)))
(define-vop (32bit-logical-nor 32bit-logical)
(:translate 32bit-logical-nor)
(:generator 1
(inst nor r x y)))
(define-vop (32bit-logical-xor 32bit-logical)
(:translate 32bit-logical-xor)
(:generator 1
(inst xor r x y)))
(deftransform 32bit-logical-eqv ((x y) (* *))
'(32bit-logical-not (32bit-logical-xor x y)))
(deftransform 32bit-logical-andc1 ((x y) (* *))
'(32bit-logical-and (32bit-logical-not x) y))
(deftransform 32bit-logical-andc2 ((x y) (* *))
'(32bit-logical-and x (32bit-logical-not y)))
(deftransform 32bit-logical-orc1 ((x y) (* *))
'(32bit-logical-or (32bit-logical-not x) y))
(deftransform 32bit-logical-orc2 ((x y) (* *))
'(32bit-logical-or x (32bit-logical-not 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")
(:generator 1
(ecase *backend-byte-order*
(:big-endian
(inst sll r num amount))
(:little-endian
(inst srl r num amount)))))
(define-vop (shift-towards-end shift-towards-someplace)
(:translate shift-towards-end)
(:note "SHIFT-TOWARDS-END")
(:generator 1
(ecase *backend-byte-order*
(:big-endian
(inst srl r num amount))
(:little-endian
(inst sll r num amount)))))
;;;; 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)
(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)
(:conditional)
(:info target not-p)
(:generator 2
(if not-p
(inst bltz digit target)
(inst bgez digit target))
(inst nop)))
(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 (any-reg)))
(:arg-types unsigned-num unsigned-num positive-fixnum)
(:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
(:results (result :scs (unsigned-reg))
(carry :scs (unsigned-reg) :from :eval))
(:result-types unsigned-num positive-fixnum)
(:temporary (:scs (non-descriptor-reg)) temp)
(:generator 5
(let ((carry-in (gen-label))
(done (gen-label)))
(inst bne c carry-in)
(inst addu res a b)
(inst b done)
(inst sltu carry res b)
(emit-label carry-in)
(inst addu res 1)
(inst nor temp a zero-tn)
(inst sltu carry b temp)
(inst xor carry 1)
(emit-label done)
(move result res))))
(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 (any-reg)))
(:arg-types unsigned-num unsigned-num positive-fixnum)
(:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
(:results (result :scs (unsigned-reg))
(borrow :scs (unsigned-reg) :from :eval))
(:result-types unsigned-num positive-fixnum)
(:generator 4
(let ((no-borrow-in (gen-label))
(done (gen-label)))
(inst bne c no-borrow-in)
(inst subu res a b)
(inst subu res 1)
(inst b done)
(inst sltu borrow b a)
(emit-label no-borrow-in)
(inst sltu borrow a b)
(inst xor borrow 1)
(emit-label done)
(move result res))))
(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)
(:temporary (:scs (unsigned-reg) :from (:argument 1)) temp)
(:results (hi :scs (unsigned-reg))
(lo :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:generator 6
(inst multu x y)
(inst mflo temp)
(inst addu lo temp carry-in)
(inst sltu temp lo carry-in)
(inst mfhi hi)
(inst addu hi temp)))
(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)
(:temporary (:scs (unsigned-reg) :from (:argument 2)) temp)
(:results (hi :scs (unsigned-reg))
(lo :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:generator 9
(inst multu x y)
(inst addu lo prev carry-in)
(inst sltu temp lo carry-in)
(inst mfhi hi)
(inst addu hi temp)
(inst mflo temp)
(inst addu lo temp)
(inst sltu temp lo temp)
(inst addu hi temp)))
(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 multu x y)
(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 (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 digit fixnum 2)))
(define-vop (bignum-floor)
(:translate sb!bignum::%floor)
(:policy :fast-safe)
(:args (num-high :scs (unsigned-reg) :target rem)
(num-low :scs (unsigned-reg) :target rem-low)
(denom :scs (unsigned-reg) :to (:eval 1)))
(:arg-types unsigned-num unsigned-num unsigned-num)
(:temporary (:scs (unsigned-reg) :from (:argument 1)) rem-low)
(: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.
(move rem num-high)
(move rem-low num-low)
(flet ((maybe-subtract (&optional (guess temp))
(inst subu temp guess 1)
(inst and temp denom)
(inst subu rem temp)))
(inst sltu quo rem denom)
(maybe-subtract quo)
(dotimes (i 32)
(inst sll rem 1)
(inst srl temp rem-low 31)
(inst or rem temp)
(inst sll rem-low 1)
(inst sltu temp rem denom)
(inst sll quo 1)
(inst or quo temp)
(maybe-subtract)))
(inst nor quo zero-tn)))
(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 1
(sc-case res
(any-reg
(inst sll res digit 2))
(signed-reg
(move res digit)))))
(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)))
(:result-types unsigned-num)
(:generator 1
(inst sra result digit count)))
(define-vop (digit-lshr digit-ashr)
(:translate sb!bignum::%digit-logical-shift-right)
(:generator 1
(inst srl result digit count)))
(define-vop (digit-ashl digit-ashr)
(:translate sb!bignum::%ashl)
(:generator 1
(inst sll result digit count)))
;;;; 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)