0.8.13.56:

	Fix for (gcd 1 10000000000000000000000) problem (returning a
	small bignum)
	... %normalize the thing if it has length 1 (all other lengths
		are automatically catered for);
	... include automatically generated tests.

diff --git a/src/code/bignum.lisp b/src/code/bignum.lisp
index a607f58..e50ec32 100644 (file)
--- a/src/code/bignum.lisp
+++ b/src/code/bignum.lisp
@@ -541,6 +541,14 @@
                    ((oddp or-digits) (+ (* i digit-size) j))
                  (declare (type (mod #.sb!vm:n-word-bits) j))))))))
 
+;;; Allocate a single word bignum that holds fixnum. This is useful when
+;;; we are trying to mix fixnum and bignum operands.
+#!-sb-fluid (declaim (inline make-small-bignum))
+(defun make-small-bignum (fixnum)
+  (let ((res (%allocate-bignum 1)))
+    (setf (%bignum-ref res 0) (%fixnum-to-digit fixnum))
+    res))
+
 (defun bignum-gcd (a b)
   (let* ((a (if (%bignum-0-or-plusp a (%bignum-length a))
                a
@@ -570,7 +578,9 @@
                (setf a (make-small-bignum rem))
                (setf a rem))
            (rotatef a b)))
-    a))
+    (if (= (%bignum-length a) 1)
+       (%normalize-bignum a 1)
+       a)))
   
 (defun bignum-binary-gcd (a b)
   (declare (type bignum-type a b))
@@ -2263,14 +2273,6 @@ IS LESS EFFICIENT BUT EASIER TO MAINTAIN. BILL SAYS THIS CODE CERTAINLY WORKS!
 \f
 ;;;; general utilities
 
-;;; Allocate a single word bignum that holds fixnum. This is useful when
-;;; we are trying to mix fixnum and bignum operands.
-#!-sb-fluid (declaim (inline make-small-bignum))
-(defun make-small-bignum (fixnum)
-  (let ((res (%allocate-bignum 1)))
-    (setf (%bignum-ref res 0) (%fixnum-to-digit fixnum))
-    res))
-
 ;;; Internal in-place operations use this to fixup remaining digits in the
 ;;; incoming data, such as in-place shifting. This is basically the same as
 ;;; the first form in %NORMALIZE-BIGNUM, but we return the length of the buffer

diff --git a/tests/gcd.pure.lisp b/tests/gcd.pure.lisp
new file mode 100644 (file)
index 0000000..ae66887
--- /dev/null
+++ b/tests/gcd.pure.lisp
@@ -0,0 +1,566 @@
+;;;; tests of GCD with no side effects
+
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; While most of SBCL is derived from the CMU CL system, the test
+;;;; files (like this one) were written from scratch after the fork
+;;;; from CMU CL.
+;;;; 
+;;;; This software is in the public domain and is provided with
+;;;; absolutely no warranty. See the COPYING and CREDITS files for
+;;;; more information.
+
+(cl:in-package :cl-user)
+
+;;; note: the below were generated automatically from the following
+;;; program:
+#+nil
+(progn
+  (defun random-factor (n)
+    (let ((accum 1))
+      (dotimes (i n accum)
+       (setf accum (* accum (nth (random 20)
+                                 '(2 2 2 3 3
+                                   5 7 11 13 17
+                                   19 23 29 31 37
+                                   41 43 47 53 59)))))))
+  
+  (with-open-file (s "tests/gcd.impure.lisp"
+                    :direction :output :if-exists :supersede)
+    (dotimes (i 40)
+      (dotimes (j (ceiling i 2))
+       (let ((x (random-factor i))
+             (y (random-factor j)))
+         (format s "~&~S~%" `(assert (= (gcd ,x ,y) ,(gcd x y)))))))))
+;;; run from a different lisp implementation.  As such, if you get a
+;;; failure, check (by hand!) who is right.  -- CSR, 2004-08-10
+     
+(ASSERT (= (GCD 3 1) 1))
+(ASSERT (= (GCD 9 1) 1))
+(ASSERT (= (GCD 1353 1) 1))
+(ASSERT (= (GCD 2755 13) 1))
+(ASSERT (= (GCD 3146 1) 1))
+(ASSERT (= (GCD 56 2) 2))
+(ASSERT (= (GCD 223706 1) 1))
+(ASSERT (= (GCD 148665 2) 1))
+(ASSERT (= (GCD 71862 203) 203))
+(ASSERT (= (GCD 14464263 1) 1))
+(ASSERT (= (GCD 21568911 41) 41))
+(ASSERT (= (GCD 15295874 111) 37))
+(ASSERT (= (GCD 167524732 1) 1))
+(ASSERT (= (GCD 20430054 41) 41))
+(ASSERT (= (GCD 248255254 767) 13))
+(ASSERT (= (GCD 510104442 5453) 1))
+(ASSERT (= (GCD 100809345 1) 1))
+(ASSERT (= (GCD 242162410 41) 1))
+(ASSERT (= (GCD 660070972 74) 74))
+(ASSERT (= (GCD 6542405452 117) 1))
+(ASSERT (= (GCD 4641925173847 1) 1))
+(ASSERT (= (GCD 629448534 2) 2))
+(ASSERT (= (GCD 163873565922 155) 31))
+(ASSERT (= (GCD 1563464979842 442) 34))
+(ASSERT (= (GCD 3712337724 576173) 23))
+(ASSERT (= (GCD 4429248 1) 1))
+(ASSERT (= (GCD 4380921044390 5) 5))
+(ASSERT (= (GCD 4097970629150 86) 2))
+(ASSERT (= (GCD 2090198664 1118) 2))
+(ASSERT (= (GCD 5275411661289 31857) 21))
+(ASSERT (= (GCD 17015415976168 1) 1))
+(ASSERT (= (GCD 38602581835881 19) 1))
+(ASSERT (= (GCD 82578867500655 319) 29))
+(ASSERT (= (GCD 363169800 20) 20))
+(ASSERT (= (GCD 2033404107084 23374) 2))
+(ASSERT (= (GCD 7438317458260 31213) 13))
+(ASSERT (= (GCD 20223947479736 1) 1))
+(ASSERT (= (GCD 390609000 11) 1))
+(ASSERT (= (GCD 406117800 57) 3))
+(ASSERT (= (GCD 1008217762344 4403) 37))
+(ASSERT (= (GCD 136581511784536 67022) 62))
+(ASSERT (= (GCD 43293168048 1344610) 2))
+(ASSERT (= (GCD 154378910321790 1) 1))
+(ASSERT (= (GCD 608503422693864 47) 47))
+(ASSERT (= (GCD 6945109296864 779) 19))
+(ASSERT (= (GCD 1346702251365156 435) 87))
+(ASSERT (= (GCD 1388225063690465 644) 7))
+(ASSERT (= (GCD 1200780158492850 91686) 354))
+(ASSERT (= (GCD 1551193257090906 2656731) 1749))
+(ASSERT (= (GCD 2453369841000 1) 1))
+(ASSERT (= (GCD 386512944051107445 17) 17))
+(ASSERT (= (GCD 1111364125679340 6) 6))
+(ASSERT (= (GCD 15858537083857314 21793) 21793))
+(ASSERT (= (GCD 44179338013272 280645) 41))
+(ASSERT (= (GCD 64149298745840 43808357) 35131))
+(ASSERT (= (GCD 4412914630225794 515823) 46893))
+(ASSERT (= (GCD 7518817068019302045 1) 1))
+(ASSERT (= (GCD 169216424701305960 17) 1))
+(ASSERT (= (GCD 178335507754891305 817) 817))
+(ASSERT (= (GCD 460683358924445799142 518) 518))
+(ASSERT (= (GCD 113021475230160 74635) 6785))
+(ASSERT (= (GCD 74228340534140364 363909) 1677))
+(ASSERT (= (GCD 69242022961311060 48305942) 60458))
+(ASSERT (= (GCD 286967952870300 2273388) 156))
+(ASSERT (= (GCD 10593379420837191160 1) 1))
+(ASSERT (= (GCD 302822258393413362492399 29) 29))
+(ASSERT (= (GCD 10491072879382200 133) 133))
+(ASSERT (= (GCD 167206737423420464 609) 7))
+(ASSERT (= (GCD 72212583812867784 4888799) 47))
+(ASSERT (= (GCD 4170116471639397292390 1798025) 359605))
+(ASSERT (= (GCD 83910330283522050 35224) 238))
+(ASSERT (= (GCD 275373383775647594346 66884092) 104834))
+(ASSERT (= (GCD 24798951106800092040 1) 1))
+(ASSERT (= (GCD 14656657495570695990 37) 1))
+(ASSERT (= (GCD 95470974177676509874110 1219) 1219))
+(ASSERT (= (GCD 619506317623001424 5957) 7))
+(ASSERT (= (GCD 11268171656665155960 9858) 186))
+(ASSERT (= (GCD 6172860073826160 5167394) 3074))
+(ASSERT (= (GCD 26457493095663264 1491412) 3956))
+(ASSERT (= (GCD 8481384175941103284 313836405) 51))
+(ASSERT (= (GCD 60356595775749199080 176098815946) 1716346))
+(ASSERT (= (GCD 2062895192248935732930 1) 1))
+(ASSERT (= (GCD 611492274956002440 37) 37))
+(ASSERT (= (GCD 164614611843685080 1711) 59))
+(ASSERT (= (GCD 93177516542679418720 62197) 37))
+(ASSERT (= (GCD 938959746797519770440 127558) 127558))
+(ASSERT (= (GCD 137670522526899326250 200) 50))
+(ASSERT (= (GCD 852063402206742880 41643478) 58406))
+(ASSERT (= (GCD 55947291202307909360 188546228) 6364))
+(ASSERT (= (GCD 12877971214039423262680 9832253830) 121730))
+(ASSERT (= (GCD 2217480094627700577948 1) 1))
+(ASSERT (= (GCD 192158415774146059920 53) 53))
+(ASSERT (= (GCD 902814024155808960 1829) 31))
+(ASSERT (= (GCD 1265864304573235487120 4921) 259))
+(ASSERT (= (GCD 14172662463567665400 95817) 57))
+(ASSERT (= (GCD 32171996211745702482324 2368555) 259))
+(ASSERT (= (GCD 971324258606045826300 4576748) 236))
+(ASSERT (= (GCD 2400649320046378377000 1704690) 930))
+(ASSERT (= (GCD 953233796456393760 18342152493) 574287))
+(ASSERT (= (GCD 28906333140964843080 236206740) 823020))
+(ASSERT (= (GCD 19478907070569571633008 1) 1))
+(ASSERT (= (GCD 775403093708557121609032 41) 41))
+(ASSERT (= (GCD 12587009808135760402860 2491) 47))
+(ASSERT (= (GCD 510685807527370566909720 76) 4))
+(ASSERT (= (GCD 9842598153710524682146590 10089) 3363))
+(ASSERT (= (GCD 44936631038618189620242012 30740) 6148))
+(ASSERT (= (GCD 934589372977008750144 373650) 282))
+(ASSERT (= (GCD 33027125273398900134069150 840577803) 840577803))
+(ASSERT (= (GCD 4428219127938822420288 1695783782) 12502))
+(ASSERT (= (GCD 29316428815807608915440 560764380) 153340))
+(ASSERT (= (GCD 2366157559867828791011766 1) 1))
+(ASSERT (= (GCD 1364397376360544429904 19) 19))
+(ASSERT (= (GCD 4991450791697293128313385277 329) 7))
+(ASSERT (= (GCD 75448279792981695149550 3009) 3))
+(ASSERT (= (GCD 181031604499464166188731133 3364) 1))
+(ASSERT (= (GCD 405831142402606479845286 2746214) 161542))
+(ASSERT (= (GCD 89170366469003867207160 25337230) 11470))
+(ASSERT (= (GCD 13523725766340619200 1490114045) 28595))
+(ASSERT (= (GCD 104705939487154940255412 192200052) 26196))
+(ASSERT (= (GCD 7232591421499800642000 16584679460) 7820))
+(ASSERT (= (GCD 14043796716396386984750160 33382708236) 358953852))
+(ASSERT (= (GCD 11835771070979649489696 1) 1))
+(ASSERT (= (GCD 13894638105872256412416 23) 23))
+(ASSERT (= (GCD 147611447155643499428400 118) 2))
+(ASSERT (= (GCD 13356594697070649024 4558) 106))
+(ASSERT (= (GCD 15089731174706036171537760 90) 30))
+(ASSERT (= (GCD 307230141273924828960 1971507) 1581))
+(ASSERT (= (GCD 2582563944548247741930009096 22873474) 1759498))
+(ASSERT (= (GCD 1074296602920111687342072 146235518) 21758))
+(ASSERT (= (GCD 774058642832724262993980 407557010) 2531410))
+(ASSERT (= (GCD 291091930213008490369569480 13412544348) 26508))
+(ASSERT (= (GCD 2089068565149831833568 7302038455228) 68171356))
+(ASSERT (= (GCD 15874791883700662031579460 1) 1))
+(ASSERT (= (GCD 1064437567441124038217970656 5) 1))
+(ASSERT (= (GCD 142557826750459447787460 1333) 31))
+(ASSERT (= (GCD 311779340580033594160200 23693) 23693))
+(ASSERT (= (GCD 29314187023691666530559664 110143) 110143))
+(ASSERT (= (GCD 222003853016244177637944900 857463) 857463))
+(ASSERT (= (GCD 6247776111945111006243552 77976501) 2515371))
+(ASSERT (= (GCD 1140058514761397155259712 5530338) 502758))
+(ASSERT (= (GCD 580962736822969724865449808 55686036) 1505028))
+(ASSERT (= (GCD 4100502596989506786787500 45333475410) 563730))
+(ASSERT (= (GCD 1497378750311599979536944 262630276090) 361046))
+(ASSERT (= (GCD 105637634198318524045536 2633013240) 150072))
+(ASSERT (= (GCD 70489308475051480717893899280 1) 1))
+(ASSERT (= (GCD 11415822547029425161364106595632 7) 1))
+(ASSERT (= (GCD 198305933339312916107438448 177) 3))
+(ASSERT (= (GCD 3127415425979879537134790928 3335) 667))
+(ASSERT (= (GCD 589703503861221139260034914750 13209) 357))
+(ASSERT (= (GCD 3108579252052448504121792 14322) 462))
+(ASSERT (= (GCD 636976201153021006473464400 66264077) 3487583))
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+(ASSERT (= (GCD 90107067439719108194114160 28566806069714) 3408519994))
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+(ASSERT (= (GCD 21275338550698297089687698855820 3021) 3021))
+(ASSERT (= (GCD 417525245705449941528380320750068 5828) 5828))
+(ASSERT (= (GCD 1954871230146370370001829871352 22765249) 22765249))
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+(ASSERT (= (GCD 85664559165674439863772868932 322014) 322014))
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+(ASSERT (= (GCD 21253900104556838003127171970777418412 1182797770) 62698))
+(ASSERT
+ (= (GCD 3964268932242030284914943132662620 21244177854110) 18521515130))
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+ (= (GCD 56468122001858834917195045500 429400787158167902) 2090772606538))
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+ (= (GCD 4337552841738910859248770564912480 17722936528737830) 338114285990))
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+(ASSERT
+ (= (GCD 44890707654126305940250882318870941900 18329973480720) 1527497790060))
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+(ASSERT (= (GCD 17608179287674151740172985536160 980399424528) 91686096))
+(ASSERT
+ (= (GCD 43194437079731225735521919644800 178119261126453036) 80633436453804))
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+(ASSERT (= (GCD 427663965127849896842400211428345149025 234) 117))
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+(ASSERT
+ (= (GCD 210110141308655567793064872567302676320 720390430628) 468699044))
+(ASSERT (= (GCD 668425085137718599277317523827419000 19898594339442) 58711254))
+(ASSERT
+ (= (GCD 89533471731097208414073727453200 4173840860670546) 2257350384354))
+(ASSERT
+ (= (GCD 113987439157802480362236410675251462620 21548296273949445)
+  1134120856523655))
+(ASSERT
+ (= (GCD 48129335993995093308894209644253760 1009442888504820) 84891337020))
+(ASSERT
+ (= (GCD 3497836376962291922989777163497680 138736290091634664)
+  3383811953454504))
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+ (= (GCD 35941673649029587182509620977230062500 25622409466332) 525598668))
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+  11198041400))
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+  854667743111400))
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+  10157304590446104))
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+  3476056267530))
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diff --git a/version.lisp-expr b/version.lisp-expr
index 43d052a..f047785 100644 (file)
--- a/version.lisp-expr
+++ b/version.lisp-expr
@@ -17,4 +17,4 @@
 ;;; checkins which aren't released. (And occasionally for internal
 ;;; versions, especially for internal versions off the main CVS
 ;;; branch, it gets hairier, e.g. "0.pre7.14.flaky4.13".)
-"0.8.13.55"
+"0.8.13.56"