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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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.
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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;
            }
        }
    }
}