TestBlsmskL.java

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/**
 * @test
 * @bug 8031321
 * @summary Verify that results of computations are the same w/
 *          and w/o usage of BLSMSK instruction
 * @library /testlibrary /testlibrary/whitebox
 * @build TestBlsmskL BMITestRunner Expr
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI TestBlsmskL
 */

import sun.hotspot.cpuinfo.CPUInfo;

public class TestBlsmskL {

    public static void main(String args[]) throws Throwable {
        if (!CPUInfo.hasFeature("bmi1")) {
            System.out.println("INFO: CPU does not support bmi1 feature.");
        }

        BMITestRunner.runTests(BlsmskLExpr.class, args,
                               "-XX:+IgnoreUnrecognizedVMOptions",
                               "-XX:+UseBMI1Instructions");
        BMITestRunner.runTests(BlsmskLCommutativeExpr.class, args,
                               "-XX:+IgnoreUnrecognizedVMOptions",
                               "-XX:+UseBMI1Instructions");
    }

    public static class BlsmskLExpr
        extends Expr.BMIUnaryLongExpr {

        public long longExpr(long src) {
            return (src - 1) ^ src;
        }

        public long longExpr(Expr.MemL src) {
            return (src.value - 1) ^ src.value;
        }

    }

    public static class BlsmskLCommutativeExpr
        extends Expr.BMIUnaryLongExpr {

        public long longExpr(long src) {
            return src ^ (src - 1);
        }

        public long longExpr(Expr.MemL src) {
            return src.value ^ (src.value - 1);
        }

    }

}