1 ;;;; the VM definition arithmetic VOPs for MIPS
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
14 ;;;; Unary operations.
16 (define-vop (fixnum-unop)
17 (:args (x :scs (any-reg)))
18 (:results (res :scs (any-reg)))
19 (:note "inline fixnum arithmetic")
20 (:arg-types tagged-num)
21 (:result-types tagged-num)
24 (define-vop (signed-unop)
25 (:args (x :scs (signed-reg)))
26 (:results (res :scs (signed-reg)))
27 (:note "inline (signed-byte 32) arithmetic")
28 (:arg-types signed-num)
29 (:result-types signed-num)
32 (define-vop (fast-negate/fixnum fixnum-unop)
35 (inst subu res zero-tn x)))
37 (define-vop (fast-negate/signed signed-unop)
40 (inst subu res zero-tn x)))
42 (define-vop (fast-lognot/fixnum fixnum-unop)
43 (:temporary (:scs (any-reg) :type fixnum :to (:result 0))
47 (inst li temp (fixnumize -1))
48 (inst xor res x temp)))
50 (define-vop (fast-lognot/signed signed-unop)
53 (inst nor res x zero-tn)))
57 ;;;; Binary fixnum operations.
59 ;;; Assume that any constant operand is the second arg...
61 (define-vop (fast-fixnum-binop)
62 (:args (x :target r :scs (any-reg))
63 (y :target r :scs (any-reg)))
64 (:arg-types tagged-num tagged-num)
65 (:results (r :scs (any-reg)))
66 (:result-types tagged-num)
67 (:note "inline fixnum arithmetic")
72 (define-vop (fast-unsigned-binop)
73 (:args (x :target r :scs (unsigned-reg))
74 (y :target r :scs (unsigned-reg)))
75 (:arg-types unsigned-num unsigned-num)
76 (:results (r :scs (unsigned-reg)))
77 (:result-types unsigned-num)
78 (:note "inline (unsigned-byte 32) arithmetic")
83 (define-vop (fast-signed-binop)
84 (:args (x :target r :scs (signed-reg))
85 (y :target r :scs (signed-reg)))
86 (:arg-types signed-num signed-num)
87 (:results (r :scs (signed-reg)))
88 (:result-types signed-num)
89 (:note "inline (signed-byte 32) arithmetic")
94 (define-vop (fast-fixnum-c-binop fast-fixnum-binop)
95 (:args (x :target r :scs (any-reg)))
97 (:arg-types tagged-num (:constant integer)))
99 (define-vop (fast-signed-c-binop fast-signed-binop)
100 (:args (x :target r :scs (signed-reg)))
102 (:arg-types tagged-num (:constant integer)))
104 (define-vop (fast-unsigned-c-binop fast-unsigned-binop)
105 (:args (x :target r :scs (unsigned-reg)))
107 (:arg-types tagged-num (:constant integer)))
109 (defmacro define-binop (translate cost untagged-cost op
110 tagged-type untagged-type)
112 (define-vop (,(symbolicate "FAST-" translate "/FIXNUM=>FIXNUM")
114 (:args (x :target r :scs (any-reg))
115 (y :target r :scs (any-reg)))
116 (:translate ,translate)
117 (:generator ,(1+ cost)
119 (define-vop (,(symbolicate "FAST-" translate "/SIGNED=>SIGNED")
121 (:args (x :target r :scs (signed-reg))
122 (y :target r :scs (signed-reg)))
123 (:translate ,translate)
124 (:generator ,(1+ untagged-cost)
126 (define-vop (,(symbolicate "FAST-" translate "/UNSIGNED=>UNSIGNED")
128 (:args (x :target r :scs (unsigned-reg))
129 (y :target r :scs (unsigned-reg)))
130 (:translate ,translate)
131 (:generator ,(1+ untagged-cost)
134 `((define-vop (,(symbolicate "FAST-" translate "-C/FIXNUM=>FIXNUM")
136 (:arg-types tagged-num (:constant ,tagged-type))
137 (:translate ,translate)
139 (inst ,op r x (fixnumize y))))))
140 ,@(when untagged-type
141 `((define-vop (,(symbolicate "FAST-" translate "-C/SIGNED=>SIGNED")
143 (:arg-types signed-num (:constant ,untagged-type))
144 (:translate ,translate)
145 (:generator ,untagged-cost
147 (define-vop (,(symbolicate "FAST-" translate
148 "-C/UNSIGNED=>UNSIGNED")
149 fast-unsigned-c-binop)
150 (:arg-types unsigned-num (:constant ,untagged-type))
151 (:translate ,translate)
152 (:generator ,untagged-cost
153 (inst ,op r x y)))))))
155 (define-binop + 1 5 addu (signed-byte 14) (signed-byte 16))
156 (define-binop - 1 5 subu
157 (integer #.(- (1- (ash 1 14))) #.(ash 1 14))
158 (integer #.(- (1- (ash 1 16))) #.(ash 1 16)))
159 (define-binop logior 1 3 or (unsigned-byte 14) (unsigned-byte 16))
160 (define-binop logand 1 3 and (unsigned-byte 14) (unsigned-byte 16))
161 (define-binop logxor 1 3 xor (unsigned-byte 14) (unsigned-byte 16))
163 ;;; KLUDGE: no FIXNUM VOP for LOGNOR, because there's no efficient way
164 ;;; of restoring the tag bits. (No -C/ VOPs for LOGNOR because the
165 ;;; NOR instruction doesn't take immediate args). -- CSR, 2003-09-11
166 (define-vop (fast-lognor/signed=>signed fast-signed-binop)
168 (:args (x :target r :scs (signed-reg))
169 (y :target r :scs (signed-reg)))
172 (define-vop (fast-lognor/unsigned=>unsigned fast-unsigned-binop)
174 (:args (x :target r :scs (unsigned-reg))
175 (y :target r :scs (unsigned-reg)))
179 ;;; Special case fixnum + and - that trap on overflow. Useful when we don't
180 ;;; know that the result is going to be a fixnum.
183 (define-vop (fast-+/fixnum fast-+/fixnum=>fixnum)
184 (:results (r :scs (any-reg descriptor-reg)))
185 (:result-types (:or signed-num unsigned-num))
190 (define-vop (fast-+-c/fixnum fast-+-c/fixnum=>fixnum)
191 (:results (r :scs (any-reg descriptor-reg)))
192 (:result-types (:or signed-num unsigned-num))
195 (inst add r x (fixnumize y))))
197 (define-vop (fast--/fixnum fast--/fixnum=>fixnum)
198 (:results (r :scs (any-reg descriptor-reg)))
199 (:result-types (:or signed-num unsigned-num))
204 (define-vop (fast---c/fixnum fast---c/fixnum=>fixnum)
205 (:results (r :scs (any-reg descriptor-reg)))
206 (:result-types (:or signed-num unsigned-num))
209 (inst sub r x (fixnumize y))))
210 ) ; bogus trap-to-c-land +/-
214 (define-vop (fast-ash/unsigned=>unsigned)
216 (:args (number :scs (unsigned-reg) :to :save)
217 (amount :scs (signed-reg) :to :save))
218 (:arg-types unsigned-num signed-num)
219 (:results (result :scs (unsigned-reg)))
220 (:result-types unsigned-num)
223 (:temporary (:sc non-descriptor-reg) ndesc)
224 (:temporary (:sc non-descriptor-reg :to :eval) temp)
226 (inst bgez amount positive)
227 (inst subu ndesc zero-tn amount)
228 (inst slt temp ndesc 32)
229 (inst bne temp zero-tn done)
230 (inst srl result number ndesc)
232 (inst move result zero-tn)
235 ;; The result-type assures us that this shift will not overflow.
236 (inst sll result number amount)
240 (define-vop (fast-ash/signed=>signed)
242 (:args (number :scs (signed-reg) :to :save)
243 (amount :scs (signed-reg)))
244 (:arg-types signed-num signed-num)
245 (:results (result :scs (signed-reg)))
246 (:result-types signed-num)
249 (:temporary (:sc non-descriptor-reg) ndesc)
250 (:temporary (:sc non-descriptor-reg :to :eval) temp)
252 (inst bgez amount positive)
253 (inst subu ndesc zero-tn amount)
254 (inst slt temp ndesc 31)
255 (inst bne temp zero-tn done)
256 (inst sra result number ndesc)
258 (inst sra result number 31)
261 ;; The result-type assures us that this shift will not overflow.
262 (inst sll result number amount)
267 (define-vop (fast-ash-c/unsigned=>unsigned)
271 (:args (number :scs (unsigned-reg)))
273 (:arg-types unsigned-num (:constant integer))
274 (:results (result :scs (unsigned-reg)))
275 (:result-types unsigned-num)
278 ((< count -31) (move result zero-tn))
279 ((< count 0) (inst srl result number (min (- count) 31)))
280 ((> count 0) (inst sll result number (min count 31)))
281 (t (bug "identity ASH not transformed away")))))
283 (define-vop (fast-ash-c/signed=>signed)
287 (:args (number :scs (signed-reg)))
289 (:arg-types signed-num (:constant integer))
290 (:results (result :scs (signed-reg)))
291 (:result-types signed-num)
294 ((< count 0) (inst sra result number (min (- count) 31)))
295 ((> count 0) (inst sll result number (min count 31)))
296 (t (bug "identity ASH not transformed away")))))
298 (macrolet ((def (name sc-type type result-type cost)
302 (:args (number :scs (,sc-type))
303 (amount :scs (signed-reg unsigned-reg immediate)))
304 (:arg-types ,type positive-fixnum)
305 (:results (result :scs (,result-type)))
306 (:result-types ,type)
310 ((signed-reg unsigned-reg)
311 (inst sll result number amount))
313 (let ((amount (tn-value amount)))
315 (inst sll result number amount))))))))
316 (def fast-ash-left/fixnum=>fixnum any-reg tagged-num any-reg 2)
317 (def fast-ash-left/signed=>signed signed-reg signed-num signed-reg 3)
318 (def fast-ash-left/unsigned=>unsigned unsigned-reg unsigned-num unsigned-reg 3))
320 (define-vop (signed-byte-32-len)
321 (:translate integer-length)
322 (:note "inline (signed-byte 32) integer-length")
324 (:args (arg :scs (signed-reg) :target shift))
325 (:arg-types signed-num)
326 (:results (res :scs (any-reg)))
327 (:result-types positive-fixnum)
328 (:temporary (:scs (non-descriptor-reg) :from (:argument 0)) shift)
330 (let ((loop (gen-label))
333 (inst bgez shift test)
336 (inst nor shift shift)
339 (inst add res (fixnumize 1))
342 (inst bne shift loop)
343 (inst srl shift 1))))
345 (define-vop (unsigned-byte-32-count)
346 (:translate logcount)
347 (:note "inline (unsigned-byte 32) logcount")
349 (:args (arg :scs (unsigned-reg) :target num))
350 (:arg-types unsigned-num)
351 (:results (res :scs (unsigned-reg)))
352 (:result-types positive-fixnum)
353 (:temporary (:scs (non-descriptor-reg) :from (:argument 0) :to (:result 0)
355 (:temporary (:scs (non-descriptor-reg)) mask temp)
357 (inst li mask #x55555555)
358 (inst srl temp arg 1)
359 (inst and num arg mask)
362 (inst li mask #x33333333)
363 (inst srl temp num 2)
367 (inst li mask #x0f0f0f0f)
368 (inst srl temp num 4)
372 (inst li mask #x00ff00ff)
373 (inst srl temp num 8)
377 (inst li mask #x0000ffff)
378 (inst srl temp num 16)
381 (inst addu res num temp)))
384 ;;; Multiply and Divide.
386 (define-vop (fast-*/fixnum=>fixnum fast-fixnum-binop)
387 (:temporary (:scs (non-descriptor-reg)) temp)
394 (define-vop (fast-*/signed=>signed fast-signed-binop)
400 (define-vop (fast-*/unsigned=>unsigned fast-unsigned-binop)
408 (define-vop (fast-truncate/fixnum fast-fixnum-binop)
409 (:translate truncate)
410 (:results (q :scs (any-reg))
412 (:result-types tagged-num tagged-num)
413 (:temporary (:scs (non-descriptor-reg) :to :eval) temp)
415 (:save-p :compute-only)
417 (let ((zero (generate-error-code vop division-by-zero-error x y)))
418 (inst beq y zero-tn zero))
425 (define-vop (fast-truncate/unsigned fast-unsigned-binop)
426 (:translate truncate)
427 (:results (q :scs (unsigned-reg))
428 (r :scs (unsigned-reg)))
429 (:result-types unsigned-num unsigned-num)
431 (:save-p :compute-only)
433 (let ((zero (generate-error-code vop division-by-zero-error x y)))
434 (inst beq y zero-tn zero))
440 (define-vop (fast-truncate/signed fast-signed-binop)
441 (:translate truncate)
442 (:results (q :scs (signed-reg))
443 (r :scs (signed-reg)))
444 (:result-types signed-num signed-num)
446 (:save-p :compute-only)
448 (let ((zero (generate-error-code vop division-by-zero-error x y)))
449 (inst beq y zero-tn zero))
457 ;;;; Binary conditional VOPs:
459 (define-vop (fast-conditional)
464 (:temporary (:scs (non-descriptor-reg)) temp)
465 (:policy :fast-safe))
467 (define-vop (fast-conditional/fixnum fast-conditional)
468 (:args (x :scs (any-reg))
470 (:arg-types tagged-num tagged-num)
471 (:note "inline fixnum comparison"))
473 (define-vop (fast-conditional-c/fixnum fast-conditional/fixnum)
474 (:args (x :scs (any-reg)))
475 (:arg-types tagged-num (:constant (signed-byte-with-a-bite-out 14 4)))
476 (:info target not-p y))
478 (define-vop (fast-conditional/signed fast-conditional)
479 (:args (x :scs (signed-reg))
480 (y :scs (signed-reg)))
481 (:arg-types signed-num signed-num)
482 (:note "inline (signed-byte 32) comparison"))
484 (define-vop (fast-conditional-c/signed fast-conditional/signed)
485 (:args (x :scs (signed-reg)))
486 (:arg-types signed-num (:constant (signed-byte-with-a-bite-out 16 1)))
487 (:info target not-p y))
489 (define-vop (fast-conditional/unsigned fast-conditional)
490 (:args (x :scs (unsigned-reg))
491 (y :scs (unsigned-reg)))
492 (:arg-types unsigned-num unsigned-num)
493 (:note "inline (unsigned-byte 32) comparison"))
495 (define-vop (fast-conditional-c/unsigned fast-conditional/unsigned)
496 (:args (x :scs (unsigned-reg)))
497 (:arg-types unsigned-num (:constant (and (signed-byte-with-a-bite-out 16 1)
499 (:info target not-p y))
502 (defmacro define-conditional-vop (translate &rest generator)
504 ,@(mapcar #'(lambda (suffix cost signed)
505 (unless (and (member suffix '(/fixnum -c/fixnum))
507 `(define-vop (,(intern (format nil "~:@(FAST-IF-~A~A~)"
510 (format nil "~:@(FAST-CONDITIONAL~A~)"
512 (:translate ,translate)
514 (let* ((signed ,signed)
515 (-c/fixnum ,(eq suffix '-c/fixnum))
516 (y (if -c/fixnum (fixnumize y) y)))
517 (declare (ignorable signed -c/fixnum y))
519 '(/fixnum -c/fixnum /signed -c/signed /unsigned -c/unsigned)
521 '(t t t t nil nil))))
523 (define-conditional-vop <
524 (cond ((and signed (eql y 0))
527 (inst bltz x target)))
531 (inst sltu temp x y))
533 (inst beq temp zero-tn target)
534 (inst bne temp zero-tn target))))
537 (define-conditional-vop >
538 (cond ((and signed (eql y 0))
541 (inst bgtz x target)))
543 (let ((y (+ y (if -c/fixnum (fixnumize 1) 1))))
546 (inst sltu temp x y))
548 (inst bne temp zero-tn target)
549 (inst beq temp zero-tn target))))
553 (inst sltu temp y x))
555 (inst beq temp zero-tn target)
556 (inst bne temp zero-tn target))))
559 ;;; EQL/FIXNUM is funny because the first arg can be of any type, not just a
562 (define-conditional-vop eql
563 (declare (ignore signed))
568 (inst bne x y target)
569 (inst beq x y target))
572 ;;; These versions specify a fixnum restriction on their first arg. We have
573 ;;; also generic-eql/fixnum VOPs which are the same, but have no restriction on
574 ;;; the first arg and a higher cost. The reason for doing this is to prevent
575 ;;; fixnum specific operations from being used on word integers, spuriously
576 ;;; consing the argument.
578 (define-vop (fast-eql/fixnum fast-conditional)
579 (:args (x :scs (any-reg))
581 (:arg-types tagged-num tagged-num)
582 (:note "inline fixnum comparison")
587 (inst bne x y target)
588 (inst beq x y target))
591 (define-vop (generic-eql/fixnum fast-eql/fixnum)
592 (:args (x :scs (any-reg descriptor-reg))
594 (:arg-types * tagged-num)
597 (define-vop (fast-eql-c/fixnum fast-conditional/fixnum)
598 (:args (x :scs (any-reg)))
599 (:arg-types tagged-num (:constant (signed-byte 14)))
600 (:info target not-p y)
603 (let ((y (cond ((eql y 0) zero-tn)
605 (inst li temp (fixnumize y))
608 (inst bne x y target)
609 (inst beq x y target))
612 (define-vop (generic-eql-c/fixnum fast-eql-c/fixnum)
613 (:args (x :scs (any-reg descriptor-reg)))
614 (:arg-types * (:constant (signed-byte 14)))
618 ;;;; 32-bit logical operations
620 (define-vop (merge-bits)
621 (:translate merge-bits)
622 (:args (shift :scs (signed-reg unsigned-reg))
623 (prev :scs (unsigned-reg))
624 (next :scs (unsigned-reg)))
625 (:arg-types tagged-num unsigned-num unsigned-num)
626 (:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
627 (:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
628 (:results (result :scs (unsigned-reg)))
629 (:result-types unsigned-num)
632 (let ((done (gen-label)))
633 (inst beq shift done)
634 (inst srl res next shift)
635 (inst subu temp zero-tn shift)
636 (inst sll temp prev temp)
637 (inst or res res temp)
641 (define-vop (shift-towards-someplace)
643 (:args (num :scs (unsigned-reg))
644 (amount :scs (signed-reg)))
645 (:arg-types unsigned-num tagged-num)
646 (:results (r :scs (unsigned-reg)))
647 (:result-types unsigned-num))
649 (define-vop (shift-towards-start shift-towards-someplace)
650 (:translate shift-towards-start)
651 (:note "SHIFT-TOWARDS-START")
653 (ecase *backend-byte-order*
655 (inst sll r num amount))
657 (inst srl r num amount)))))
659 (define-vop (shift-towards-end shift-towards-someplace)
660 (:translate shift-towards-end)
661 (:note "SHIFT-TOWARDS-END")
663 (ecase *backend-byte-order*
665 (inst srl r num amount))
667 (inst sll r num amount)))))
669 ;;;; Modular arithmetic
670 (define-modular-fun +-mod32 (x y) + 32)
671 (define-vop (fast-+-mod32/unsigned=>unsigned fast-+/unsigned=>unsigned)
672 (:translate +-mod32))
673 (define-vop (fast-+-mod32-c/unsigned=>unsigned fast-+-c/unsigned=>unsigned)
674 (:translate +-mod32))
675 (define-modular-fun --mod32 (x y) - 32)
676 (define-vop (fast---mod32/unsigned=>unsigned fast--/unsigned=>unsigned)
677 (:translate --mod32))
678 (define-vop (fast---mod32-c/unsigned=>unsigned fast---c/unsigned=>unsigned)
679 (:translate --mod32))
681 (define-vop (fast-ash-left-mod32-c/unsigned=>unsigned
682 fast-ash-c/unsigned=>unsigned)
683 (:translate ash-left-mod32))
685 (define-vop (fast-ash-left-mod32/unsigned=>unsigned
686 fast-ash-left/unsigned=>unsigned))
687 (deftransform ash-left-mod32 ((integer count)
688 ((unsigned-byte 32) (unsigned-byte 5)))
689 (when (sb!c::constant-lvar-p count)
690 (sb!c::give-up-ir1-transform))
691 '(%primitive fast-ash-left-mod32/unsigned=>unsigned integer count))
693 ;;; logical operations
694 (define-modular-fun lognot-mod32 (x) lognot 32)
695 (define-vop (lognot-mod32/unsigned=>unsigned)
696 (:translate lognot-mod32)
697 (:args (x :scs (unsigned-reg)))
698 (:arg-types unsigned-num)
699 (:results (r :scs (unsigned-reg)))
700 (:result-types unsigned-num)
703 (inst nor r x zero-tn)))
705 (define-modular-fun logxor-mod32 (x y) logxor 32)
706 (define-vop (fast-logxor-mod32/unsigned=>unsigned
707 fast-logxor/unsigned=>unsigned)
708 (:translate logxor-mod32))
709 (define-vop (fast-logxor-mod32-c/unsigned=>unsigned
710 fast-logxor-c/unsigned=>unsigned)
711 (:translate logxor-mod32))
713 (define-modular-fun lognor-mod32 (x y) lognor 32)
714 (define-vop (fast-lognor-mod32/unsigned=>unsigned
715 fast-lognor/unsigned=>unsigned)
716 (:translate lognor-mod32))
718 (define-source-transform logeqv (&rest args)
719 (if (oddp (length args))
721 `(lognot (logxor ,@args))))
722 (define-source-transform logandc1 (x y)
723 `(logand (lognot ,x) ,y))
724 (define-source-transform logandc2 (x y)
725 `(logand ,x (lognot ,y)))
726 (define-source-transform logorc1 (x y)
727 `(logior (lognot ,x) ,y))
728 (define-source-transform logorc2 (x y)
729 `(logior ,x (lognot ,y)))
730 (define-source-transform lognand (x y)
731 `(lognot (logand ,x ,y)))
734 (define-vop (bignum-length get-header-data)
735 (:translate sb!bignum:%bignum-length)
736 (:policy :fast-safe))
738 (define-vop (bignum-set-length set-header-data)
739 (:translate sb!bignum:%bignum-set-length)
740 (:policy :fast-safe))
742 (define-full-reffer bignum-ref * bignum-digits-offset other-pointer-lowtag
743 (unsigned-reg) unsigned-num sb!bignum:%bignum-ref)
745 (define-full-setter bignum-set * bignum-digits-offset other-pointer-lowtag
746 (unsigned-reg) unsigned-num sb!bignum:%bignum-set)
748 (define-vop (digit-0-or-plus)
749 (:translate sb!bignum:%digit-0-or-plusp)
751 (:args (digit :scs (unsigned-reg)))
752 (:arg-types unsigned-num)
757 (inst bltz digit target)
758 (inst bgez digit target))
761 (define-vop (add-w/carry)
762 (:translate sb!bignum:%add-with-carry)
764 (:args (a :scs (unsigned-reg))
765 (b :scs (unsigned-reg))
767 (:arg-types unsigned-num unsigned-num positive-fixnum)
768 (:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
769 (:results (result :scs (unsigned-reg))
770 (carry :scs (unsigned-reg) :from :eval))
771 (:result-types unsigned-num positive-fixnum)
772 (:temporary (:scs (non-descriptor-reg)) temp)
774 (let ((carry-in (gen-label))
776 (inst bne c carry-in)
780 (inst sltu carry res b)
782 (emit-label carry-in)
784 (inst nor temp a zero-tn)
785 (inst sltu carry b temp)
791 (define-vop (sub-w/borrow)
792 (:translate sb!bignum:%subtract-with-borrow)
794 (:args (a :scs (unsigned-reg))
795 (b :scs (unsigned-reg))
797 (:arg-types unsigned-num unsigned-num positive-fixnum)
798 (:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
799 (:results (result :scs (unsigned-reg))
800 (borrow :scs (unsigned-reg) :from :eval))
801 (:result-types unsigned-num positive-fixnum)
803 (let ((no-borrow-in (gen-label))
806 (inst bne c no-borrow-in)
811 (inst sltu borrow b a)
813 (emit-label no-borrow-in)
814 (inst sltu borrow a b)
820 (define-vop (bignum-mult-and-add-3-arg)
821 (:translate sb!bignum:%multiply-and-add)
823 (:args (x :scs (unsigned-reg))
824 (y :scs (unsigned-reg))
825 (carry-in :scs (unsigned-reg) :to :save))
826 (:arg-types unsigned-num unsigned-num unsigned-num)
827 (:temporary (:scs (unsigned-reg) :from (:argument 1)) temp)
828 (:results (hi :scs (unsigned-reg))
829 (lo :scs (unsigned-reg)))
830 (:result-types unsigned-num unsigned-num)
834 (inst addu lo temp carry-in)
835 (inst sltu temp lo carry-in)
837 (inst addu hi temp)))
839 (define-vop (bignum-mult-and-add-4-arg)
840 (:translate sb!bignum:%multiply-and-add)
842 (:args (x :scs (unsigned-reg))
843 (y :scs (unsigned-reg))
844 (prev :scs (unsigned-reg))
845 (carry-in :scs (unsigned-reg) :to :save))
846 (:arg-types unsigned-num unsigned-num unsigned-num unsigned-num)
847 (:temporary (:scs (unsigned-reg) :from (:argument 2)) temp)
848 (:results (hi :scs (unsigned-reg))
849 (lo :scs (unsigned-reg)))
850 (:result-types unsigned-num unsigned-num)
853 (inst addu lo prev carry-in)
854 (inst sltu temp lo carry-in)
859 (inst sltu temp lo temp)
860 (inst addu hi temp)))
862 (define-vop (bignum-mult)
863 (:translate sb!bignum:%multiply)
865 (:args (x :scs (unsigned-reg))
866 (y :scs (unsigned-reg)))
867 (:arg-types unsigned-num unsigned-num)
868 (:results (hi :scs (unsigned-reg))
869 (lo :scs (unsigned-reg)))
870 (:result-types unsigned-num unsigned-num)
876 (define-vop (bignum-lognot lognot-mod32/unsigned=>unsigned)
877 (:translate sb!bignum:%lognot))
879 (define-vop (fixnum-to-digit)
880 (:translate sb!bignum:%fixnum-to-digit)
882 (:args (fixnum :scs (any-reg)))
883 (:arg-types tagged-num)
884 (:results (digit :scs (unsigned-reg)))
885 (:result-types unsigned-num)
887 (inst sra digit fixnum 2)))
889 (define-vop (bignum-floor)
890 (:translate sb!bignum:%floor)
892 (:args (num-high :scs (unsigned-reg) :target rem)
893 (num-low :scs (unsigned-reg) :target rem-low)
894 (denom :scs (unsigned-reg) :to (:eval 1)))
895 (:arg-types unsigned-num unsigned-num unsigned-num)
896 (:temporary (:scs (unsigned-reg) :from (:argument 1)) rem-low)
897 (:temporary (:scs (unsigned-reg) :from (:eval 0)) temp)
898 (:results (quo :scs (unsigned-reg) :from (:eval 0))
899 (rem :scs (unsigned-reg) :from (:argument 0)))
900 (:result-types unsigned-num unsigned-num)
901 (:generator 325 ; number of inst assuming targeting works.
903 (move rem-low num-low)
904 (flet ((maybe-subtract (&optional (guess temp))
905 (inst subu temp guess 1)
906 (inst and temp denom)
907 (inst subu rem temp)))
908 (inst sltu quo rem denom)
912 (inst srl temp rem-low 31)
915 (inst sltu temp rem denom)
919 (inst nor quo zero-tn)))
921 (define-vop (signify-digit)
922 (:translate sb!bignum:%fixnum-digit-with-correct-sign)
924 (:args (digit :scs (unsigned-reg) :target res))
925 (:arg-types unsigned-num)
926 (:results (res :scs (any-reg signed-reg)))
927 (:result-types signed-num)
931 (inst sll res digit 2))
936 (define-vop (digit-ashr)
937 (:translate sb!bignum:%ashr)
939 (:args (digit :scs (unsigned-reg))
940 (count :scs (unsigned-reg)))
941 (:arg-types unsigned-num positive-fixnum)
942 (:results (result :scs (unsigned-reg)))
943 (:result-types unsigned-num)
945 (inst sra result digit count)))
947 (define-vop (digit-lshr digit-ashr)
948 (:translate sb!bignum:%digit-logical-shift-right)
950 (inst srl result digit count)))
952 (define-vop (digit-ashl digit-ashr)
953 (:translate sb!bignum:%ashl)
955 (inst sll result digit count)))
958 ;;;; Static functions.
960 (define-static-fun two-arg-gcd (x y) :translate gcd)
961 (define-static-fun two-arg-lcm (x y) :translate lcm)
963 (define-static-fun two-arg-+ (x y) :translate +)
964 (define-static-fun two-arg-- (x y) :translate -)
965 (define-static-fun two-arg-* (x y) :translate *)
966 (define-static-fun two-arg-/ (x y) :translate /)
968 (define-static-fun two-arg-< (x y) :translate <)
969 (define-static-fun two-arg-<= (x y) :translate <=)
970 (define-static-fun two-arg-> (x y) :translate >)
971 (define-static-fun two-arg->= (x y) :translate >=)
972 (define-static-fun two-arg-= (x y) :translate =)
973 (define-static-fun two-arg-/= (x y) :translate /=)
975 (define-static-fun %negate (x) :translate %negate)
977 (define-static-fun two-arg-and (x y) :translate logand)
978 (define-static-fun two-arg-ior (x y) :translate logior)
979 (define-static-fun two-arg-xor (x y) :translate logxor)