X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Farith.pure.lisp;h=3452abea638a676e5ff0a39535e932117f5be43f;hb=ba02429b75951fc407be01c44fdcb01ff2908707;hp=7493d4ef672129dcc951892776de5d182e1ca048;hpb=3bc5fbfb7f1528cb2c2e49b2d15fcaa6c62f5b49;p=sbcl.git

diff --git a/tests/arith.pure.lisp b/tests/arith.pure.lisp
index 7493d4e..3452abe 100644
--- a/tests/arith.pure.lisp
+++ b/tests/arith.pure.lisp
@@ -102,3 +102,46 @@
 		   (= (funcall fn 2) x2)
 		   (= (funcall fn 3) x3))
 	(error "bad results for ~D" x)))))
+
+;;; Bugs reported by Paul Dietz:
+
+;;; (GCD 0 x) must return (abs x)
+(dolist (x (list -10 (* 3 most-negative-fixnum)))
+  (assert (= (gcd 0 x) (abs x))))
+;;; LCM returns a non-negative number
+(assert (= (lcm 4 -10) 20))
+(assert (= (lcm 0 0) 0))
+
+;;; PPC bignum arithmetic bug:
+(multiple-value-bind (quo rem)
+    (truncate 291351647815394962053040658028983955 10000000000000000000000000)
+  (assert (= quo 29135164781))
+  (assert (= rem 5394962053040658028983955)))
+
+;;; x86 LEA bug:
+(assert (= (funcall
+	    (compile nil '(lambda (x) (declare (bit x)) (+ x #xf0000000)))
+	    1)
+	   #xf0000001))
+
+;;; LOGBITP on bignums:
+(dolist (x '(((1+ most-positive-fixnum) 1 nil)
+	     ((1+ most-positive-fixnum) -1 t)
+	     ((1+ most-positive-fixnum) (1+ most-positive-fixnum) nil)
+	     ((1+ most-positive-fixnum) (1- most-negative-fixnum) t)
+	     (1 (ash most-negative-fixnum 1) nil)
+	     (29 most-negative-fixnum t)
+	     (30 (ash most-negative-fixnum 1) t)
+	     (31 (ash most-negative-fixnum 1) t)
+	     (64 (ash most-negative-fixnum 36) nil)
+	     (65 (ash most-negative-fixnum 36) t)))
+  (destructuring-bind (index int result) x
+    (assert (eq (eval `(logbitp ,index ,int)) result))))
+
+;;; off-by-1 type inference error for %DPB and %DEPOSIT-FIELD:
+(let ((f (compile nil '(lambda (b)
+                        (integer-length (dpb b (byte 4 28) -1005))))))
+  (assert (= (funcall f 1230070) 32)))
+(let ((f (compile nil '(lambda (b)
+                        (integer-length (deposit-field b (byte 4 28) -1005))))))
+  (assert (= (funcall f 1230070) 32)))