hotspot/test/compiler/floatingpoint/NaNTest.java
changeset 32391 01e2f5e916c7
child 40059 c2304140ed64
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/compiler/floatingpoint/NaNTest.java	Wed Aug 19 08:55:18 2015 +0200
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2015, 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 8076373
+ * @summary Verify if signaling NaNs are preserved.
+ * @run main NaNTest
+ */
+public class NaNTest {
+    static void testFloat() {
+        int originalValue = 0x7f800001;
+        int readBackValue = Float.floatToRawIntBits(Float.intBitsToFloat(originalValue));
+        if (originalValue != readBackValue) {
+            String errorMessage = String.format("Original and read back float values mismatch\n0x%X 0x%X\n",
+                                                originalValue,
+                                                readBackValue);
+            throw new RuntimeException(errorMessage);
+        } else {
+            System.out.printf("Written and read back float values match\n0x%X 0x%X\n",
+                              originalValue,
+                              readBackValue);
+        }
+    }
+
+    static void testDouble() {
+        long originalValue = 0xFFF0000000000001L;
+        long readBackValue = Double.doubleToRawLongBits(Double.longBitsToDouble(originalValue));
+        if (originalValue != readBackValue) {
+            String errorMessage = String.format("Original and read back double values mismatch\n0x%X 0x%X\n",
+                                                originalValue,
+                                                readBackValue);
+            throw new RuntimeException(errorMessage);
+        } else {
+            System.out.printf("Written and read back double values match\n0x%X 0x%X\n",
+                              originalValue,
+                              readBackValue);
+        }
+
+    }
+
+    public static void main(String args[]) {
+        System.out.println("### NanTest started");
+
+        testFloat();
+        testDouble();
+
+        System.out.println("### NanTest ended");
+    }
+}