aoqi@0: /*
aoqi@0:  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@0: /**
aoqi@0:  * @test
aoqi@0:  * @bug 8031321
aoqi@0:  * @summary Verify that results of computations are the same w/
aoqi@0:  *          and w/o usage of BLSR instruction
aoqi@0:  * @library /testlibrary /testlibrary/whitebox
aoqi@0:  * @build TestBlsrL BMITestRunner Expr
aoqi@0:  * @run main ClassFileInstaller sun.hotspot.WhiteBox
aoqi@0:  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
aoqi@0:  *                   -XX:+WhiteBoxAPI TestBlsrL
aoqi@0:  */
aoqi@0: 
aoqi@0: import sun.hotspot.cpuinfo.CPUInfo;
aoqi@0: 
aoqi@0: public class TestBlsrL {
aoqi@0: 
aoqi@0:     public static void main(String args[]) throws Throwable {
aoqi@0:         if (!CPUInfo.hasFeature("bmi1")) {
aoqi@0:             System.out.println("CPU does not support bmi1 feature. " +
aoqi@0:                                "Test skipped.");
aoqi@0:             return;
aoqi@0:         }
aoqi@0: 
aoqi@0:         BMITestRunner.runTests(BlsrLExpr.class, args,
aoqi@0:                                "-XX:+UseBMI1Instructions");
aoqi@0:         BMITestRunner.runTests(BlsrLCommutativeExpr.class, args,
aoqi@0:                                "-XX:+UseBMI1Instructions");
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static class BlsrLExpr extends Expr.BMIUnaryLongExpr {
aoqi@0: 
aoqi@0:         public long longExpr(long src) {
aoqi@0:             return (src - 1) & src;
aoqi@0:         }
aoqi@0: 
aoqi@0:         public long longExpr(Expr.MemL src) {
aoqi@0:             return (src.value - 1) & src.value;
aoqi@0:         }
aoqi@0: 
aoqi@0:     }
aoqi@0: 
aoqi@0:     public static class BlsrLCommutativeExpr extends Expr.BMIUnaryLongExpr {
aoqi@0: 
aoqi@0:         public long longExpr(long src) {
aoqi@0:             return src & (src - 1);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public long longExpr(Expr.MemL src) {
aoqi@0:             return src.value & (src.value - 1);
aoqi@0:         }
aoqi@0: 
aoqi@0:     }
aoqi@0: 
aoqi@0: }