test/tools/javac/lambda/LambdaTestStrictFPMethod.java

Mon, 23 Jun 2014 13:14:32 -0700

author
rfield
date
Mon, 23 Jun 2014 13:14:32 -0700
changeset 2528
eb284abd64fe
permissions
-rw-r--r--

8046060: Different results of floating point multiplication for lambda code block
Summary: propogate strictfp into lambda body
Reviewed-by: vromero, jlahoda

     1 /*
     2  * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     4  *
     5  * This code is free software; you can redistribute it and/or modify it
     6  * under the terms of the GNU General Public License version 2 only, as
     7  * published by the Free Software Foundation.
     8  *
     9  * This code is distributed in the hope that it will be useful, but WITHOUT
    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    12  * version 2 for more details (a copy is included in the LICENSE file that
    13  * accompanied this code).
    14  *
    15  * You should have received a copy of the GNU General Public License version
    16  * 2 along with this work; if not, write to the Free Software Foundation,
    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    18  *
    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    20  * or visit www.oracle.com if you need additional information or have any
    21  * questions.
    22  */
    24 /*
    25  * @test
    26  * @bug 8046060
    27  * @summary Different results of floating point multiplication for lambda code block
    28  */
    30 public class LambdaTestStrictFPMethod {
    32     public static void main(String args[]) {
    33         new LambdaTestStrictFPMethod().test();
    34     }
    36     strictfp void test() {
    37         double result = eval(() -> {
    38             double x = Double.longBitsToDouble(0x1e7ee00000000000L);
    39             double y = Double.longBitsToDouble(0x2180101010101010L);
    41             return x * y;
    42         });
    43         {
    44             double x = Double.longBitsToDouble(0x1e7ee00000000000L);
    45             double y = Double.longBitsToDouble(0x2180101010101010L);
    47             double z = x * y;
    48             check(z, result, "method");
    49         }
    50     }
    52     strictfp void check(double expected, double got, String where) {
    53         if (got != expected) {
    54             throw new AssertionError(where + ": Non-strictfp " + got + " != " + expected);
    55         }
    56     }
    58     static double eval(Face arg) {
    59         return arg.m();
    60     }
    62     interface Face {
    63         double m();
    64     }
    65 }

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