X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=tests%2Farith.pure.lisp;h=db7cbe5d63991d20063a6ac63413a46c043659cd;hb=33b3c0e45a34f035fa918682832f1affa6747930;hp=bef097cc95250c706e8fd1abcf3dea8c5c1fd8ca;hpb=178128629005f3b6b8c40bbb510b498d7552f13c;p=sbcl.git

diff --git a/tests/arith.pure.lisp b/tests/arith.pure.lisp
index bef097c..db7cbe5 100644
--- a/tests/arith.pure.lisp
+++ b/tests/arith.pure.lisp
@@ -73,3 +73,17 @@ ASSERTion fails, probably in something related to bug #194.
 (assert (null (ignore-errors (max 3 #'max))))
 (assert (= (max -3 0) 0))
 ||#
+
+;;; (CEILING x 2^k) was optimized incorrectly
+(loop for divisor in '(-4 4)
+   for ceiler = (compile nil `(lambda (x)
+                                (declare (fixnum x))
+                                (declare (optimize (speed 3)))
+                                (ceiling x ,divisor)))
+   do (loop for i from -5 to 5
+         for exact-q = (/ i divisor)
+         do (multiple-value-bind (q r)
+                (funcall ceiler i)
+              (assert (= (+ (* q divisor) r) i))
+              (assert (<= exact-q q))
+              (assert (< q (1+ exact-q))))))