1 ;;;; the VM definition arithmetic VOPs for the Alpha
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.
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 64) arithmetic")
28 (:arg-types signed-num)
29 (:result-types signed-num)
32 (define-vop (fast-negate/fixnum fixnum-unop)
35 (inst subq zero-tn x res)))
37 (define-vop (fast-negate/signed signed-unop)
40 (inst subq zero-tn x res)))
42 (define-vop (fast-lognot/fixnum fixnum-unop)
45 (inst eqv x zero-tn res)))
47 (define-vop (fast-lognot/signed signed-unop)
52 ;;;; binary fixnum operations
54 ;;; Assume that any constant operand is the second arg...
56 (define-vop (fast-fixnum-binop)
57 (:args (x :target r :scs (any-reg))
58 (y :target r :scs (any-reg)))
59 (:arg-types tagged-num tagged-num)
60 (:results (r :scs (any-reg)))
61 (:result-types tagged-num)
62 (:note "inline fixnum arithmetic")
67 (define-vop (fast-unsigned-binop)
68 (:args (x :target r :scs (unsigned-reg))
69 (y :target r :scs (unsigned-reg)))
70 (:arg-types unsigned-num unsigned-num)
71 (:results (r :scs (unsigned-reg)))
72 (:result-types unsigned-num)
73 (:note "inline (unsigned-byte 64) arithmetic")
78 (define-vop (fast-signed-binop)
79 (:args (x :target r :scs (signed-reg))
80 (y :target r :scs (signed-reg)))
81 (:arg-types signed-num signed-num)
82 (:results (r :scs (signed-reg)))
83 (:result-types signed-num)
84 (:note "inline (signed-byte 64) arithmetic")
89 (define-vop (fast-fixnum-c-binop fast-fixnum-binop)
90 (:args (x :target r :scs (any-reg)))
92 (:arg-types tagged-num (:constant integer)))
94 (define-vop (fast-signed-c-binop fast-signed-binop)
95 (:args (x :target r :scs (signed-reg)))
97 (:arg-types signed-num (:constant integer)))
99 (define-vop (fast-unsigned-c-binop fast-unsigned-binop)
100 (:args (x :target r :scs (unsigned-reg)))
102 (:arg-types unsigned-num (:constant integer)))
104 (defmacro define-binop (translate cost untagged-cost op
105 tagged-type untagged-type
106 &optional arg-swap restore-fixnum-mask)
108 (define-vop (,(symbolicate "FAST-" translate "/FIXNUM=>FIXNUM")
110 ,@(when restore-fixnum-mask
111 `((:temporary (:sc non-descriptor-reg) temp)))
112 (:args (x ,@(unless restore-fixnum-mask `(:target r)) :scs (any-reg))
113 (y ,@(unless restore-fixnum-mask `(:target r)) :scs (any-reg)))
114 (:translate ,translate)
115 (:generator ,(1+ cost)
117 `(inst ,op y x ,(if restore-fixnum-mask 'temp 'r))
118 `(inst ,op x y ,(if restore-fixnum-mask 'temp 'r)))
119 ,@(when restore-fixnum-mask
120 `((inst bic temp #.(ash lowtag-mask -1) r)))))
121 (define-vop (,(symbolicate "FAST-" translate "/SIGNED=>SIGNED")
123 (:args (x :target r :scs (signed-reg))
124 (y :target r :scs (signed-reg)))
125 (:translate ,translate)
126 (:generator ,(1+ untagged-cost)
130 (define-vop (,(symbolicate "FAST-" translate "/UNSIGNED=>UNSIGNED")
132 (:args (x :target r :scs (unsigned-reg))
133 (y :target r :scs (unsigned-reg)))
134 (:translate ,translate)
135 (:generator ,(1+ untagged-cost)
139 ,@(when (and tagged-type (not arg-swap))
140 `((define-vop (,(symbolicate "FAST-" translate "-C/FIXNUM=>FIXNUM")
142 (:args (x ,@(unless restore-fixnum-mask `(:target r))
144 (:arg-types tagged-num (:constant ,tagged-type))
145 ,@(when restore-fixnum-mask
146 `((:temporary (:sc non-descriptor-reg) temp)))
147 (:translate ,translate)
149 (inst ,op x (fixnumize y) ,(if restore-fixnum-mask 'temp 'r))
150 ,@(when restore-fixnum-mask
151 `((inst bic temp #.(ash lowtag-mask -1) r)))))))
152 ,@(when (and untagged-type (not arg-swap))
153 `((define-vop (,(symbolicate "FAST-" translate "-C/SIGNED=>SIGNED")
155 (:arg-types signed-num (:constant ,untagged-type))
156 (:translate ,translate)
157 (:generator ,untagged-cost
159 (define-vop (,(symbolicate "FAST-" translate
160 "-C/UNSIGNED=>UNSIGNED")
161 fast-unsigned-c-binop)
162 (:arg-types unsigned-num (:constant ,untagged-type))
163 (:translate ,translate)
164 (:generator ,untagged-cost
165 (inst ,op x y r)))))))
167 (define-binop + 1 5 addq (unsigned-byte 6) (unsigned-byte 8))
168 (define-binop - 1 5 subq (unsigned-byte 6) (unsigned-byte 8))
169 (define-binop logand 1 3 and (unsigned-byte 6) (unsigned-byte 8))
170 (define-binop logandc1 1 3 bic (unsigned-byte 6) (unsigned-byte 8) t)
171 (define-binop logandc2 1 3 bic (unsigned-byte 6) (unsigned-byte 8))
172 (define-binop logior 1 3 bis (unsigned-byte 6) (unsigned-byte 8))
173 (define-binop logorc1 1 3 ornot (unsigned-byte 6) (unsigned-byte 8) t t)
174 (define-binop logorc2 1 3 ornot (unsigned-byte 6) (unsigned-byte 8) nil t)
175 (define-binop logxor 1 3 xor (unsigned-byte 6) (unsigned-byte 8))
176 (define-binop logeqv 1 3 eqv (unsigned-byte 6) (unsigned-byte 8) nil t)
178 ;;; special cases for LOGAND where we can use a mask operation
179 (define-vop (fast-logand-c-mask/unsigned=>unsigned fast-unsigned-c-binop)
181 (:arg-types unsigned-num
182 (:constant (or (integer #xffffffff #xffffffff)
183 (integer #xffffffff00000000 #xffffffff00000000))))
186 (#xffffffff (inst mskll x 4 r))
187 (#xffffffff00000000 (inst mskll x 0 r)))))
191 (define-vop (fast-ash/unsigned=>unsigned)
193 (:args (number :scs (unsigned-reg) :to :save)
194 (amount :scs (signed-reg)))
195 (:arg-types unsigned-num signed-num)
196 (:results (result :scs (unsigned-reg)))
197 (:result-types unsigned-num)
200 (:temporary (:sc non-descriptor-reg) ndesc)
201 (:temporary (:sc non-descriptor-reg) temp)
203 (inst bge amount positive)
204 (inst subq zero-tn amount ndesc)
205 (inst cmplt ndesc 64 temp)
206 (inst srl number ndesc result)
207 ;; FIXME: this looks like a candidate for a conditional move --
210 (move zero-tn result)
211 (inst br zero-tn done)
214 (inst sll number amount result)
218 (define-vop (fast-ash/signed=>signed)
220 (:args (number :scs (signed-reg) :to :save)
221 (amount :scs (signed-reg)))
222 (:arg-types signed-num signed-num)
223 (:results (result :scs (signed-reg)))
224 (:result-types signed-num)
227 (:temporary (:sc non-descriptor-reg) ndesc)
228 (:temporary (:sc non-descriptor-reg) temp)
230 (inst bge amount positive)
231 (inst subq zero-tn amount ndesc)
232 (inst cmplt ndesc 63 temp)
233 (inst sra number ndesc result)
235 (inst sra number 63 result)
236 (inst br zero-tn done)
239 (inst sll number amount result)
243 (define-vop (fast-ash-c/signed=>signed)
247 (:args (number :scs (signed-reg)))
249 (:arg-types signed-num (:constant integer))
250 (:results (result :scs (signed-reg)))
251 (:result-types signed-num)
254 ((< count 0) (inst sra number (min 63 (- count)) result))
255 ((> count 0) (inst sll number (min 63 count) result))
256 (t (bug "identity ASH not transformed away")))))
258 (define-vop (fast-ash-c/unsigned=>unsigned)
262 (:args (number :scs (unsigned-reg)))
264 (:arg-types unsigned-num (:constant integer))
265 (:results (result :scs (unsigned-reg)))
266 (:result-types unsigned-num)
269 ((< count -63) (move zero-tn result))
270 ((< count 0) (inst sra number (- count) result))
271 ((> count 0) (inst sll number (min 63 count) result))
272 (t (bug "identity ASH not transformed away")))))
274 (macrolet ((def (name sc-type type result-type cost)
278 (:args (number :scs (,sc-type))
279 (amount :scs (signed-reg unsigned-reg immediate)))
280 (:arg-types ,type positive-fixnum)
281 (:results (result :scs (,result-type)))
282 (:result-types ,type)
286 ((signed-reg unsigned-reg)
287 (inst sll number amount result))
289 (let ((amount (tn-value amount)))
291 (inst sll number amount result))))))))
292 (def fast-ash-left/fixnum=>fixnum any-reg tagged-num any-reg 2)
293 (def fast-ash-left/signed=>signed signed-reg signed-num signed-reg 3)
294 (def fast-ash-left/unsigned=>unsigned unsigned-reg unsigned-num unsigned-reg 3))
296 (define-vop (signed-byte-64-len)
297 (:translate integer-length)
298 (:note "inline (signed-byte 64) integer-length")
300 (:args (arg :scs (signed-reg) :to (:argument 1)))
301 (:arg-types signed-num)
302 (:results (res :scs (any-reg)))
303 (:result-types positive-fixnum)
304 (:temporary (:scs (non-descriptor-reg) :from (:argument 0)) shift)
307 (inst cmovge arg arg shift)
308 (inst subq zero-tn (fixnumize 1) res)
309 (inst sll shift 1 shift)
311 (inst addq res (fixnumize 1) res)
312 (inst srl shift 1 shift)
313 (inst bne shift loop)))
315 (define-vop (unsigned-byte-64-count)
316 (:translate logcount)
317 (:note "inline (unsigned-byte 64) logcount")
319 (:args (arg :scs (unsigned-reg)))
320 (:arg-types unsigned-num)
321 (:results (res :scs (unsigned-reg)))
322 (:result-types positive-fixnum)
323 (:guard (member :cix *backend-subfeatures*))
325 (inst ctpop zero-tn arg res)))
327 (define-vop (unsigned-byte-64-count)
328 (:translate logcount)
329 (:note "inline (unsigned-byte 64) logcount")
331 (:args (arg :scs (unsigned-reg) :target num))
332 (:arg-types unsigned-num)
333 (:results (res :scs (unsigned-reg)))
334 (:result-types positive-fixnum)
335 (:temporary (:scs (non-descriptor-reg) :from (:argument 0) :to (:result 0)
337 (:temporary (:scs (non-descriptor-reg)) mask temp)
339 ;; FIXME: now this looks expensive, what with these 64bit loads.
340 ;; Maybe a loop and count would be faster? -- CSR, 2003-09-10
341 (inst li #x5555555555555555 mask)
342 (inst srl arg 1 temp)
343 (inst and arg mask num)
344 (inst and temp mask temp)
345 (inst addq num temp num)
346 (inst li #x3333333333333333 mask)
347 (inst srl num 2 temp)
348 (inst and num mask num)
349 (inst and temp mask temp)
350 (inst addq num temp num)
351 (inst li #x0f0f0f0f0f0f0f0f mask)
352 (inst srl num 4 temp)
353 (inst and num mask num)
354 (inst and temp mask temp)
355 (inst addq num temp num)
356 (inst li #x00ff00ff00ff00ff mask)
357 (inst srl num 8 temp)
358 (inst and num mask num)
359 (inst and temp mask temp)
360 (inst addq num temp num)
361 (inst li #x0000ffff0000ffff mask)
362 (inst srl num 16 temp)
363 (inst and num mask num)
364 (inst and temp mask temp)
365 (inst addq num temp num)
366 (inst li #x00000000ffffffff mask)
367 (inst srl num 32 temp)
368 (inst and num mask num)
369 (inst and temp mask temp)
370 (inst addq num temp res)))
374 (define-vop (fast-*/fixnum=>fixnum fast-fixnum-binop)
375 (:temporary (:scs (non-descriptor-reg)) temp)
378 (inst sra y n-fixnum-tag-bits temp)
379 (inst mulq x temp r)))
381 (define-vop (fast-*/signed=>signed fast-signed-binop)
386 (define-vop (fast-*/unsigned=>unsigned fast-unsigned-binop)
391 ;;;; Modular functions:
392 (define-modular-fun lognot-mod64 (x) lognot 64)
393 (define-vop (lognot-mod64/unsigned=>unsigned)
394 (:translate lognot-mod64)
395 (:args (x :scs (unsigned-reg)))
396 (:arg-types unsigned-num)
397 (:results (res :scs (unsigned-reg)))
398 (:result-types unsigned-num)
403 (define-vop (fast-ash-left-mod64-c/unsigned=>unsigned
404 fast-ash-c/unsigned=>unsigned)
405 (:translate ash-left-mod64))
406 (define-vop (fast-ash-left-mod64/unsigned=>unsigned
407 fast-ash-left/unsigned=>unsigned))
408 (deftransform ash-left-mod64 ((integer count)
409 ((unsigned-byte 64) (unsigned-byte 6)))
410 (when (sb!c::constant-lvar-p count)
411 (sb!c::give-up-ir1-transform))
412 '(%primitive fast-ash-left-mod64/unsigned=>unsigned integer count))
415 ((define-modular-backend (fun &optional constantp)
416 (let ((mfun-name (symbolicate fun '-mod64))
417 (modvop (symbolicate 'fast- fun '-mod64/unsigned=>unsigned))
418 (modcvop (symbolicate 'fast- fun '-mod64-c/unsigned=>unsigned))
419 (vop (symbolicate 'fast- fun '/unsigned=>unsigned))
420 (cvop (symbolicate 'fast- fun '-c/unsigned=>unsigned)))
422 (define-modular-fun ,mfun-name (x y) ,fun 64)
423 (define-vop (,modvop ,vop)
424 (:translate ,mfun-name))
426 `((define-vop (,modcvop ,cvop)
427 (:translate ,mfun-name))))))))
428 (define-modular-backend + t)
429 (define-modular-backend - t)
430 (define-modular-backend logxor t)
431 (define-modular-backend logeqv t)
432 (define-modular-backend logandc1)
433 (define-modular-backend logandc2 t)
434 (define-modular-backend logorc1)
435 (define-modular-backend logorc2 t))
437 (define-source-transform lognand (x y)
438 `(lognot (logand ,x ,y)))
439 (define-source-transform lognor (x y)
440 `(lognot (logior ,x ,y)))
442 ;;;; binary conditional VOPs
444 (define-vop (fast-conditional)
449 (:temporary (:scs (non-descriptor-reg)) temp)
450 (:policy :fast-safe))
452 (define-vop (fast-conditional/fixnum fast-conditional)
453 (:args (x :scs (any-reg))
455 (:arg-types tagged-num tagged-num)
456 (:note "inline fixnum comparison"))
458 (define-vop (fast-conditional-c/fixnum fast-conditional/fixnum)
459 (:args (x :scs (any-reg)))
460 (:arg-types tagged-num (:constant (unsigned-byte-with-a-bite-out 6 4)))
461 (:info target not-p y))
463 (define-vop (fast-conditional/signed fast-conditional)
464 (:args (x :scs (signed-reg))
465 (y :scs (signed-reg)))
466 (:arg-types signed-num signed-num)
467 (:note "inline (signed-byte 64) comparison"))
469 (define-vop (fast-conditional-c/signed fast-conditional/signed)
470 (:args (x :scs (signed-reg)))
471 (:arg-types signed-num (:constant (unsigned-byte-with-a-bite-out 8 1)))
472 (:info target not-p y))
474 (define-vop (fast-conditional/unsigned fast-conditional)
475 (:args (x :scs (unsigned-reg))
476 (y :scs (unsigned-reg)))
477 (:arg-types unsigned-num unsigned-num)
478 (:note "inline (unsigned-byte 64) comparison"))
480 (define-vop (fast-conditional-c/unsigned fast-conditional/unsigned)
481 (:args (x :scs (unsigned-reg)))
482 (:arg-types unsigned-num (:constant (unsigned-byte-with-a-bite-out 8 1)))
483 (:info target not-p y))
486 (defmacro define-conditional-vop (translate &rest generator)
488 ,@(mapcar (lambda (suffix cost signed)
489 (unless (and (member suffix '(/fixnum -c/fixnum))
491 `(define-vop (,(intern (format nil "~:@(FAST-IF-~A~A~)"
494 (format nil "~:@(FAST-CONDITIONAL~A~)"
496 (:translate ,translate)
498 (let* ((signed ,signed)
499 (-c/fixnum ,(eq suffix '-c/fixnum))
500 (y (if -c/fixnum (fixnumize y) y)))
502 '(/fixnum -c/fixnum /signed -c/signed /unsigned -c/unsigned)
504 '(t t t t nil nil))))
506 (define-conditional-vop <
507 (cond ((and signed (eql y 0))
510 (inst blt x target)))
513 (inst cmplt x y temp)
514 (inst cmpult x y temp))
516 (inst beq temp target)
517 (inst bne temp target)))))
519 (define-conditional-vop >
520 (cond ((and signed (eql y 0))
523 (inst bgt x target)))
525 (let ((y (+ y (if -c/fixnum (fixnumize 1) 1))))
527 (inst cmplt x y temp)
528 (inst cmpult x y temp))
530 (inst bne temp target)
531 (inst beq temp target))))
534 (inst cmplt y x temp)
535 (inst cmpult y x temp))
537 (inst beq temp target)
538 (inst bne temp target)))))
540 ;;; EQL/FIXNUM is funny because the first arg can be of any type, not
541 ;;; just a known fixnum.
543 (define-conditional-vop eql
544 (declare (ignore signed))
548 (inst cmpeq x y temp)
550 (inst beq temp target)
551 (inst bne temp target)))
553 ;;; These versions specify a fixnum restriction on their first arg. We
554 ;;; have also generic-eql/fixnum VOPs which are the same, but have no
555 ;;; restriction on the first arg and a higher cost. The reason for
556 ;;; doing this is to prevent fixnum specific operations from being
557 ;;; used on word integers, spuriously consing the argument.
558 (define-vop (fast-eql/fixnum fast-conditional)
559 (:args (x :scs (any-reg))
561 (:arg-types tagged-num tagged-num)
562 (:note "inline fixnum comparison")
565 (cond ((equal y zero-tn)
568 (inst beq x target)))
570 (inst cmpeq x y temp)
572 (inst beq temp target)
573 (inst bne temp target))))))
576 (define-vop (generic-eql/fixnum fast-eql/fixnum)
577 (:args (x :scs (any-reg descriptor-reg))
579 (:arg-types * tagged-num)
582 (define-vop (fast-eql-c/fixnum fast-conditional/fixnum)
583 (:args (x :scs (any-reg)))
584 (:arg-types tagged-num (:constant (signed-byte 6)))
585 (:temporary (:scs (non-descriptor-reg)) temp)
586 (:info target not-p y)
589 (let ((y (cond ((eql y 0) zero-tn)
591 (inst li (fixnumize y) temp)
593 (inst cmpeq x y temp)
595 (inst beq temp target)
596 (inst bne temp target)))))
598 (define-vop (generic-eql-c/fixnum fast-eql-c/fixnum)
599 (:args (x :scs (any-reg descriptor-reg)))
600 (:arg-types * (:constant (signed-byte 6)))
604 ;;;; 32-bit logical operations
606 (define-vop (merge-bits)
607 (:translate merge-bits)
608 (:args (shift :scs (signed-reg unsigned-reg))
609 (prev :scs (unsigned-reg))
610 (next :scs (unsigned-reg)))
611 (:arg-types tagged-num unsigned-num unsigned-num)
612 (:temporary (:scs (unsigned-reg) :to (:result 0)) temp)
613 (:temporary (:scs (unsigned-reg) :to (:result 0) :target result) res)
614 (:results (result :scs (unsigned-reg)))
615 (:result-types unsigned-num)
618 (let ((done (gen-label)))
619 (inst srl next shift res)
620 (inst beq shift done)
621 (inst subq zero-tn shift temp)
622 (inst sll prev temp temp)
623 (inst bis res temp res)
627 (define-vop (shift-towards-someplace)
629 (:args (num :scs (unsigned-reg))
630 (amount :scs (signed-reg)))
631 (:arg-types unsigned-num tagged-num)
632 (:results (r :scs (unsigned-reg)))
633 (:result-types unsigned-num))
635 (define-vop (shift-towards-start shift-towards-someplace)
636 (:translate shift-towards-start)
637 (:note "SHIFT-TOWARDS-START")
638 (:temporary (:sc non-descriptor-reg) temp)
640 (inst and amount #x1f temp)
641 (inst srl num temp r)))
643 (define-vop (shift-towards-end shift-towards-someplace)
644 (:translate shift-towards-end)
645 (:note "SHIFT-TOWARDS-END")
646 (:temporary (:sc non-descriptor-reg) temp)
648 (inst and amount #x1f temp)
649 (inst sll num temp r)))
653 (define-vop (bignum-length get-header-data)
654 (:translate sb!bignum:%bignum-length)
655 (:policy :fast-safe))
657 (define-vop (bignum-set-length set-header-data)
658 (:translate sb!bignum:%bignum-set-length)
659 (:policy :fast-safe))
661 (define-full-reffer bignum-ref * bignum-digits-offset other-pointer-lowtag
662 (unsigned-reg) unsigned-num sb!bignum:%bignum-ref)
664 (define-full-setter bignum-set * bignum-digits-offset other-pointer-lowtag
665 (unsigned-reg) unsigned-num sb!bignum:%bignum-set #!+gengc nil)
667 (define-vop (digit-0-or-plus)
668 (:translate sb!bignum:%digit-0-or-plusp)
670 (:args (digit :scs (unsigned-reg)))
671 (:arg-types unsigned-num)
672 (:temporary (:sc non-descriptor-reg) temp)
676 (inst sll digit 32 temp)
678 (inst blt temp target)
679 (inst bge temp target))))
681 (define-vop (add-w/carry)
682 (:translate sb!bignum:%add-with-carry)
684 (:args (a :scs (unsigned-reg))
685 (b :scs (unsigned-reg))
686 (c :scs (unsigned-reg)))
687 (:arg-types unsigned-num unsigned-num positive-fixnum)
688 (:results (result :scs (unsigned-reg) :from :load)
689 (carry :scs (unsigned-reg) :from :eval))
690 (:result-types unsigned-num positive-fixnum)
692 (inst addq a b result)
693 (inst addq result c result)
694 (inst sra result 32 carry)
695 (inst mskll result 4 result)))
697 (define-vop (sub-w/borrow)
698 (:translate sb!bignum:%subtract-with-borrow)
700 (:args (a :scs (unsigned-reg))
701 (b :scs (unsigned-reg))
702 (c :scs (unsigned-reg)))
703 (:arg-types unsigned-num unsigned-num positive-fixnum)
704 (:results (result :scs (unsigned-reg) :from :load)
705 (borrow :scs (unsigned-reg) :from :eval))
706 (:result-types unsigned-num positive-fixnum)
708 (inst xor c 1 result)
709 (inst subq a result result)
710 (inst subq result b result)
711 (inst srl result 63 borrow)
712 (inst xor borrow 1 borrow)
713 (inst mskll result 4 result)))
715 (define-vop (bignum-mult-and-add-3-arg)
716 (:translate sb!bignum:%multiply-and-add)
718 (:args (x :scs (unsigned-reg))
719 (y :scs (unsigned-reg))
720 (carry-in :scs (unsigned-reg) :to :save))
721 (:arg-types unsigned-num unsigned-num unsigned-num)
722 (:results (hi :scs (unsigned-reg))
723 (lo :scs (unsigned-reg)))
724 (:result-types unsigned-num unsigned-num)
727 (inst addq lo carry-in lo)
729 (inst mskll lo 4 lo)))
732 (define-vop (bignum-mult-and-add-4-arg)
733 (:translate sb!bignum:%multiply-and-add)
735 (:args (x :scs (unsigned-reg))
736 (y :scs (unsigned-reg))
737 (prev :scs (unsigned-reg))
738 (carry-in :scs (unsigned-reg) :to :save))
739 (:arg-types unsigned-num unsigned-num unsigned-num unsigned-num)
740 (:results (hi :scs (unsigned-reg))
741 (lo :scs (unsigned-reg)))
742 (:result-types unsigned-num unsigned-num)
745 (inst addq lo prev lo)
746 (inst addq lo carry-in lo)
748 (inst mskll lo 4 lo)))
750 (define-vop (bignum-mult)
751 (:translate sb!bignum:%multiply)
753 (:args (x :scs (unsigned-reg))
754 (y :scs (unsigned-reg)))
755 (:arg-types unsigned-num unsigned-num)
756 (:results (hi :scs (unsigned-reg))
757 (lo :scs (unsigned-reg)))
758 (:result-types unsigned-num unsigned-num)
762 (inst mskll lo 4 lo)))
764 (define-vop (bignum-lognot)
765 (:translate sb!bignum:%lognot)
767 (:args (x :scs (unsigned-reg)))
768 (:arg-types unsigned-num)
769 (:results (r :scs (unsigned-reg)))
770 (:result-types unsigned-num)
775 (define-vop (fixnum-to-digit)
776 (:translate sb!bignum:%fixnum-to-digit)
778 (:args (fixnum :scs (any-reg)))
779 (:arg-types tagged-num)
780 (:results (digit :scs (unsigned-reg)))
781 (:result-types unsigned-num)
783 (inst sra fixnum n-fixnum-tag-bits digit)))
785 (define-vop (bignum-floor)
786 (:translate sb!bignum:%floor)
788 (:args (num-high :scs (unsigned-reg))
789 (num-low :scs (unsigned-reg))
790 (denom-arg :scs (unsigned-reg) :target denom))
791 (:arg-types unsigned-num unsigned-num unsigned-num)
792 (:temporary (:scs (unsigned-reg) :from (:argument 2)) denom)
793 (:temporary (:scs (unsigned-reg) :from (:eval 0)) temp)
794 (:results (quo :scs (unsigned-reg) :from (:eval 0))
795 (rem :scs (unsigned-reg) :from (:argument 0)))
796 (:result-types unsigned-num unsigned-num)
797 (:generator 325 ; number of inst assuming targeting works.
798 (inst sll num-high 32 rem)
799 (inst bis rem num-low rem)
800 (inst sll denom-arg 32 denom)
801 (inst cmpule denom rem quo)
802 (inst beq quo shift1)
803 (inst subq rem denom rem)
806 (let ((shift2 (gen-label)))
807 (inst srl denom 1 denom)
808 (inst cmpule denom rem temp)
810 (inst beq temp shift2)
811 (inst subq rem denom rem)
813 (emit-label shift2)))))
815 (define-vop (signify-digit)
816 (:translate sb!bignum:%fixnum-digit-with-correct-sign)
818 (:args (digit :scs (unsigned-reg) :target res))
819 (:arg-types unsigned-num)
820 (:results (res :scs (any-reg signed-reg)))
821 (:result-types signed-num)
825 (inst sll digit 34 res)
826 (inst sra res 32 res))
828 (inst sll digit 32 res)
829 (inst sra res 32 res)))))
832 (define-vop (digit-ashr)
833 (:translate sb!bignum:%ashr)
835 (:args (digit :scs (unsigned-reg))
836 (count :scs (unsigned-reg)))
837 (:arg-types unsigned-num positive-fixnum)
838 (:results (result :scs (unsigned-reg) :from (:argument 0)))
839 (:result-types unsigned-num)
841 (inst sll digit 32 result)
842 (inst sra result count result)
843 (inst srl result 32 result)))
845 (define-vop (digit-lshr digit-ashr)
846 (:translate sb!bignum:%digit-logical-shift-right)
848 (inst srl digit count result)))
850 (define-vop (digit-ashl digit-ashr)
851 (:translate sb!bignum:%ashl)
853 (inst sll digit count result)))
855 ;;;; static functions
857 (define-static-fun two-arg-gcd (x y) :translate gcd)
858 (define-static-fun two-arg-lcm (x y) :translate lcm)
860 (define-static-fun two-arg-+ (x y) :translate +)
861 (define-static-fun two-arg-- (x y) :translate -)
862 (define-static-fun two-arg-* (x y) :translate *)
863 (define-static-fun two-arg-/ (x y) :translate /)
865 (define-static-fun two-arg-< (x y) :translate <)
866 (define-static-fun two-arg-<= (x y) :translate <=)
867 (define-static-fun two-arg-> (x y) :translate >)
868 (define-static-fun two-arg->= (x y) :translate >=)
869 (define-static-fun two-arg-= (x y) :translate =)
870 (define-static-fun two-arg-/= (x y) :translate /=)
872 (define-static-fun %negate (x) :translate %negate)
874 (define-static-fun two-arg-and (x y) :translate logand)
875 (define-static-fun two-arg-ior (x y) :translate logior)
876 (define-static-fun two-arg-xor (x y) :translate logxor)
877 (define-static-fun two-arg-eqv (x y) :translate logeqv)