/*

 * 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.

 */

package org.graalvm.compiler.jtt.lang;

import org.graalvm.compiler.jtt.JTTTest;

import org.graalvm.compiler.options.OptionValues;

import org.graalvm.compiler.serviceprovider.JavaVersionUtil;

import jdk.vm.ci.meta.ResolvedJavaMethod;

public abstract class UnaryMath extends JTTTest {

    private static final long STEP = Long.MAX_VALUE / 100_000;

    /**

     * Tests a unary {@link Math} method on a wide range of values.

     */

    void testManyValues(OptionValues options, ResolvedJavaMethod method) throws AssertionError {

        if (JavaVersionUtil.JAVA_SPEC > 8) {

            /*

             * GR-8276: Allow for variance on JVMCI > 8 until a JVMCI version that includes

             * https://github.com/graalvm/graal-jvmci-8/commit/

             * c86fb66f86b8d52a08dd2495d34879d3730f9987 or Graal has stubs that a monotonic with

             * other HotSpot implementations of these Math routines.

             */

            ulpDelta = 2D;

        } else {

            /*

             * Forces the assertion message shows the ulps by which a computed result is wrong.

             */

            ulpDelta = 0D;

        }

        Object receiver = null;

        long testIteration = 0;

        for (long l = Long.MIN_VALUE;; l += STEP) {

            double d = Double.longBitsToDouble(l);

            Result expect = executeExpected(method, receiver, d);

            try {

                testAgainstExpected(options, method, expect, EMPTY, receiver, d);

                testIteration++;

            } catch (AssertionError e) {

                throw new AssertionError(String.format("%d: While testing %g [long: %d, hex: %x]", testIteration, d, l, l), e);

            }

            if (Long.MAX_VALUE - STEP < l) {

                break;

            }

        }

    }

}