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+/*
+ * Copyright (c) 2014, 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 8031321
+ * @summary Verify that results of computations are the same w/
+ * and w/o usage of intrinsic
+ * @library /testlibrary /testlibrary/whitebox
+ * @build TestLzcntI BMITestRunner Expr
+ * @run main ClassFileInstaller sun.hotspot.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
+ * -XX:+WhiteBoxAPI TestLzcntI
+ */
+
+import sun.hotspot.cpuinfo.CPUInfo;
+
+public class TestLzcntI {
+
+ public static void main(String args[]) throws Throwable {
+ if (!CPUInfo.hasFeature("lzcnt")) {
+ System.out.println("CPU does not support lzcnt feature. " +
+ "Test skipped.");
+ return;
+ }
+
+ BMITestRunner.runTests(LzcntIExpr.class, args,
+ "-XX:+UseCountLeadingZerosInstruction");
+ }
+
+ public static class LzcntIExpr extends Expr.BitCountingIntExpr {
+
+ public int intExpr(int src) {
+ return Integer.numberOfLeadingZeros(src);
+ }
+
+ }
+
+}