--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/floatingpoint/TestRound.java Mon Aug 21 07:08:40 2017 -0700
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/**
+ * @test
+ * @bug 4755500
+ * @summary calling Math.round(NaN) can break subsequent calls to Math.round()
+ * @run main compiler.floatingpoint.TestRound
+ */
+
+package compiler.floatingpoint;
+
+public class TestRound {
+ public static void main(String[] args) {
+ // Note: it's really only necessary to run this loop 8 times to
+ // reproduce the bug, but the 10000-length loop causes compilation
+ // of Math.round() without any other command-line flags.
+ // A bug in the d2l NaN case was causing overflow of the FPU
+ // stack, yielding subsequent wrong results for flds.
+ for (int i = 0; i < 10_000; i++) {
+ Math.round(Double.NaN);
+ }
+ if (Math.round(1d) != 1) {
+ throw new AssertionError("TEST FAILED");
+ }
+ System.out.println("Test passed.");
+ }
+}
+