LambdaTestStrictFPMethod.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 */

/*
 * @test
 * @bug 8046060
 * @summary Different results of floating point multiplication for lambda code block
 */

public class LambdaTestStrictFPMethod {

    public static void main(String args[]) {
        new LambdaTestStrictFPMethod().test();
    }

    strictfp void test() {
        double result = eval(() -> {
            double x = Double.longBitsToDouble(0x1e7ee00000000000L);
            double y = Double.longBitsToDouble(0x2180101010101010L);

            return x * y;
        });
        {
            double x = Double.longBitsToDouble(0x1e7ee00000000000L);
            double y = Double.longBitsToDouble(0x2180101010101010L);

            double z = x * y;
            check(z, result, "method");
        }
    }

    strictfp void check(double expected, double got, String where) {
        if (got != expected) {
            throw new AssertionError(where + ": Non-strictfp " + got + " != " + expected);
        }
    }

    static double eval(Face arg) {
        return arg.m();
    }

    interface Face {
        double m();
    }
}