6539464: Math.log() produces inconsistent results between successive runs.

Reviewed-by: kvn

src/cpu/x86/vm/templateInterpreter_x86_64.cpp

@@ -1393,12 +1393,13 @@ address AbstractInterpreterGenerator::generate_method_entry(
   case Interpreter::empty                  : entry_point = ((InterpreterGenerator*) this)->generate_empty_entry();       break;
   case Interpreter::accessor               : entry_point = ((InterpreterGenerator*) this)->generate_accessor_entry();    break;
   case Interpreter::abstract               : entry_point = ((InterpreterGenerator*) this)->generate_abstract_entry();    break;
-  case Interpreter::java_lang_math_sin     :                                                                             break;
-  case Interpreter::java_lang_math_cos     :                                                                             break;
-  case Interpreter::java_lang_math_tan     :                                                                             break;
-  case Interpreter::java_lang_math_abs     :                                                                             break;
-  case Interpreter::java_lang_math_log     :                                                                             break;
-  case Interpreter::java_lang_math_log10   :                                                                             break;
+
+  case Interpreter::java_lang_math_sin     : // fall thru
+  case Interpreter::java_lang_math_cos     : // fall thru
+  case Interpreter::java_lang_math_tan     : // fall thru
+  case Interpreter::java_lang_math_abs     : // fall thru
+  case Interpreter::java_lang_math_log     : // fall thru
+  case Interpreter::java_lang_math_log10   : // fall thru
   case Interpreter::java_lang_math_sqrt    : entry_point = ((InterpreterGenerator*) this)->generate_math_entry(kind);    break;
   default                                  : ShouldNotReachHere();                                                       break;
   }

test/compiler/6539464/Test.java

+/*
+ * Copyright 2009 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/**
+ * @test
+ * @bug 6539464
+ * @summary Math.log() produces inconsistent results between successive runs.
+ *
+ * @run main/othervm -Xcomp -XX:CompileOnly=Test.main Test
+ */
+
+public class Test {
+    static double log_value = 17197;
+    static double log_result = Math.log(log_value);
+
+    public static void main(String[] args) throws Exception {
+        for (int i = 0; i < 1000000; i++) {
+            double log_result2 = Math.log(log_value);
+            if (log_result2 != log_result) {
+                throw new InternalError("Math.log produces inconsistent results: " + log_result2 + " != " + log_result);
+            }
+        }
+    }
+}