;; GCD used to sometimes return negative values. The following did, on 32 bit
;; builds.
(with-test (:name :gcd)
+ ;; from lp#413680
(assert (plusp (gcd 20286123923750474264166990598656
- 680564733841876926926749214863536422912))))
+ 680564733841876926926749214863536422912)))
+ ;; from lp#516750
+ (assert (plusp (gcd 2596102012663483082521318626691873
+ 2596148429267413814265248164610048))))
(with-test (:name :expt-zero-zero)
;; Check that (expt 0.0 0.0) and (expt 0 0.0) signal error, but (expt 0.0 0)
(declare (type (integer -3 57216651) a))
(ldb (byte 9 27) a)))))
(assert (= 0 (- (funcall one 10) (funcall two 10))))))
+
+;; The ISQRT implementation is sufficiently complicated that it should
+;; be tested.
+(with-test (:name :isqrt)
+ (labels ((test (x)
+ (let* ((r (isqrt x))
+ (r2 (expt r 2))
+ (s2 (expt (1+ r) 2)))
+ (unless (and (<= r2 x)
+ (> s2 x))
+ (error "isqrt failure for ~a" x))))
+ (tests (x)
+ (test x)
+ (let ((x2 (expt x 2)))
+ (test x2)
+ (test (1+ x2))
+ (test (1- x2)))))
+ (test most-positive-fixnum)
+ (test (1+ most-positive-fixnum))
+ (loop for i from 1 to 200
+ for pow = (expt 2 (1- i))
+ for j = (+ pow (random pow))
+ do
+ (tests i)
+ (tests j))
+ (dotimes (i 10)
+ (tests (random (expt 2 (+ 1000 (random 10000))))))))
+
+;; bug 1026634 (reported by Eric Marsden on sbcl-devel)
+(with-test (:name :recursive-cut-to-width)
+ (assert (eql (funcall
+ (compile nil
+ `(lambda (x)
+ (declare (optimize (space 3))
+ (type (integer 12417236377505266230
+ 12417274239874990070) x))
+ (logand 8459622733968096971 x)))
+ 12417237222845306758)
+ 2612793697039849090)))