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// Tags: JDK1.5
// This file is part of Mauve.
// update for strictfp modifier Pavel Tisnovsky <ptisnovs@redhat.com>
// Mauve is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
// Mauve 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 for more details.
// You should have received a copy of the GNU General Public License
// along with Mauve; see the file COPYING. If not, write to
// the Free Software Foundation, 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
package gnu.testlet.java.lang.Math.strictfp_modifier;
import gnu.testlet.Testlet;
import gnu.testlet.TestHarness;
/**
* Test for a static method Math.expm1()
* by using strictfp modifier.
*/
public strictfp class expm1 implements Testlet
{
/**
* Function (=static method) checked by this test.
*/
private static double testedFunction(double input)
{
return Math.expm1(input);
}
/**
* These values are used as arguments to expm1.
* The values are somewhat arbitrary, but ensure that all code paths
* are tested.
*/
private static double[] inputValues =
{
0.0,
Double.NaN,
Double.POSITIVE_INFINITY,
Double.NEGATIVE_INFINITY,
0.0000000000000000277555756156289135105, // ~ 2^-55
-0.0000000000000000277555756156289135105, // ~ -2^55
0.6 * 0.6931471805599453 + 0.05, // 0.6 * ln(2) + 0.05
-0.6 * 0.6931471805599453 - 0.05, // -0.6 * ln(2) - 0.05
0.25 * 0.6931471805599453 + 0.03, // 0.25 * ln(2) + 0.03
-0.25 * 0.6931471805599453 - 0.03, // -0.25 * ln(2) - 0.03
0.44,
-0.44,
2.3 * 0.6931471805599453 + 0.05, // 2.3 * ln(2) + 0.05
-2.3 * 0.6931471805599453 - 0.05, // -2.3 * ln(2) - 0.05
7 * 0.6931471805599453 + 0.03, // 7 * ln(2) + 0.03
-9 * 0.6931471805599453 - 0.03, // -9 * ln(2) - 0.03
29 * 0.6931471805599453 + 0.03, // 29 * ln(2) + 0.03
-27 * 0.6931471805599453 - 0.03, // -27 * ln(2) - 0.03
709.782712893384, // EXP_LIMIT_H
709.782712893384 + 3.423e-5, // EXP_LIMIT_H + 3.423e-5
709.782712893384 - 3.423e-5, // EXP_LIMIT_H - 3.423e-5
-709.782712893384, // -EXP_LIMIT_H
-709.782712893384 - 3.423e-5, // -EXP_LIMIT_H - 3.423e-5
-709.782712893384 + 3.423e-5 // -EXP_LIMIT_H + 3.423e-5
};
/**
* These values are the expected results, obtained from the RI.
*/
private static double[] outputValues =
{
0.0,
Double.NaN,
Double.POSITIVE_INFINITY,
-1.0,
2.7755575615628914E-17,
-2.7755575615628914E-17,
0.5934290166706889,
-0.3724226247056801,
0.22542386346433524,
-0.1839558296400811,
0.5527072185113361,
-0.35596357891685865,
4.177066148857307,
-0.806840405116183,
130.89818034605017,
-0.9981045985672881,
5.532210644181606E8,
-0.9999999927696174,
1.7976931348622732E308,
Double.POSITIVE_INFINITY,
1.7976316008794578E308,
-1.0,
-1.0,
-1.0
};
/**
* These values represent various NaN
*/
private static long[] NaNValues =
{
0x7fff800000000000L,
0xffff800000000000L,
0x7fff812345abcdefL,
0xffff812345abcdefL,
0x7fff000000000001L,
0xffff000000000001L,
0x7fff7654321fedcbL,
0xffff7654321fedcbL
};
/**
* Test not NaN values.
*/
private void testInputValues(TestHarness harness)
{
double res;
for (int i = 0; i < inputValues.length; ++i)
{
res = testedFunction(inputValues[i]);
// exact equality
harness.check(Double.doubleToLongBits(res), Double.doubleToLongBits(outputValues[i]));
}
}
/**
* Test if input NaN is returned unchanged.
*/
private void testNaN(TestHarness harness)
{
long bitsNaN;
double valNaN;
for (int i = 0; i < NaNValues.length; ++i)
{
bitsNaN = NaNValues[i];
valNaN = Double.longBitsToDouble(bitsNaN);
// exact equality
harness.check(Double.doubleToRawLongBits(testedFunction(valNaN)),
bitsNaN);
}
}
/**
* Entry point to a test.
*/
public void test(TestHarness harness)
{
testInputValues(harness);
testNaN(harness);
}
/**
* Run this on the RI to obtain the expected output values.
*/
public static void main(String[] argv)
{
for (int i = 0; i < inputValues.length; ++i)
{
double input = inputValues[i];
double output = testedFunction(inputValues[i]);
System.out.println(" " + Double.toString(output) + ", // " + input);
}
}
}
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