0.8.20.27:

[sbcl.git] / tests / arith.pure.lisp

diff --git a/tests/arith.pure.lisp b/tests/arith.pure.lisp
index 2b1266d..3cc17fa 100644 (file)
--- a/tests/arith.pure.lisp
+++ b/tests/arith.pure.lisp
@@ -224,3 +224,43 @@
   (frob /)
   (frob floor)
   (frob ceiling))
+
+;; Check that the logic in SB-KERNEL::BASIC-COMPARE for doing fixnum/float
+;; comparisons without rationalizing the floats still gives the right anwers
+;; in the edge cases (had a fencepost error).
+(macrolet ((test (range type sign)
+            `(let (ints
+                   floats
+                   (start (- ,(find-symbol (format nil
+                                                   "MOST-~A-EXACTLY-~A-FIXNUM"
+                                                   sign type)
+                                           :sb-kernel)
+                             ,range)))
+               (dotimes (i (1+ (* ,range 2)))
+                 (let* ((x (+ start i))
+                        (y (coerce x ',type)))
+                   (push x ints)
+                   (push y floats)))
+               (dolist (i ints)
+                 (dolist (f floats)
+                   (dolist (op '(< <= = >= >))
+                     (unless (eq (funcall op i f)
+                                 (funcall op i (rationalize f)))
+                       (error "(not (eq (~a ~a ~f) (~a ~a ~a)))~%"
+                              op i f
+                              op i (rationalize f)))
+                     (unless (eq (funcall op f i)
+                                 (funcall op (rationalize f) i))
+                       (error "(not (eq (~a ~f ~a) (~a ~a ~a)))~%"
+                              op f i
+                              op (rationalize f) i))))))))
+  (test 32 double-float negative)
+  (test 32 double-float positive)
+  (test 32 single-float negative)
+  (test 32 single-float positive))
+
+;; x86-64 sign-extension bug found using pfdietz's random tester.
+(assert (= 286142502
+          (funcall (lambda () 
+                     (declare (notinline logxor)) 
+                     (min (logxor 0 0 0 286142502))))))