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/*
* Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
* 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.
*/
/*
* @test
* @bug 6274390 7082971
* @summary Verify {float, double}Value methods work with condensed representation
* @run main FloatDoubleValueTests
* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+EliminateAutoBox -XX:AutoBoxCacheMax=20000 FloatDoubleValueTests
*/
import java.math.*;
public class FloatDoubleValueTests {
private static final long two2the24 = 1L<<23;
private static final long two2the53 = 1L<<52;
// Largest long that fits exactly in a float
private static final long maxFltLong = (long)(Integer.MAX_VALUE & ~(0xff));
// Largest long that fits exactly in a double
private static final long maxDblLong = Long.MAX_VALUE & ~(0x7ffL);
static void testDoubleValue0(long i, BigDecimal bd) {
if (bd.doubleValue() != i ||
bd.longValue() != i)
throw new RuntimeException("Unexpected equality failure for " +
i + "\t" + bd);
}
static void testFloatValue0(long i, BigDecimal bd) {
if (bd.floatValue() != i ||
bd.longValue() != i)
throw new RuntimeException("Unexpected equality failure for " +
i + "\t" + bd);
}
static void checkFloat(BigDecimal bd, float f) {
float fbd = bd.floatValue();
if (f != fbd ) {
String message = String.format("Bad conversion:"+
"got %g (%a)\texpected %g (%a)",
f, f, fbd, fbd);
throw new RuntimeException(message);
}
}
static void checkDouble(BigDecimal bd, double d) {
double dbd = bd.doubleValue();
if (d != dbd ) {
String message = String.format("Bad conversion:"+
"got %g (%a)\texpected %g (%a)",
d, d, dbd, dbd);
throw new RuntimeException(message);
}
}
// Test integral values that will convert exactly to both float
// and double.
static void testFloatDoubleValue() {
long longValues[] = {
Long.MIN_VALUE, // -2^63
0,
1,
2,
two2the24-1,
two2the24,
two2the24+1,
maxFltLong-1,
maxFltLong,
maxFltLong+1,
};
for(long i : longValues) {
BigDecimal bd1 = new BigDecimal(i);
BigDecimal bd2 = new BigDecimal(-i);
testDoubleValue0( i, bd1);
testDoubleValue0(-i, bd2);
testFloatValue0( i, bd1);
testFloatValue0(-i, bd2);
}
}
static void testDoubleValue() {
long longValues[] = {
Integer.MAX_VALUE-1,
Integer.MAX_VALUE,
(long)Integer.MAX_VALUE+1,
two2the53-1,
two2the53,
two2the53+1,
maxDblLong,
};
// Test integral values that will convert exactly to double
// but not float.
for(long i : longValues) {
BigDecimal bd1 = new BigDecimal(i);
BigDecimal bd2 = new BigDecimal(-i);
testDoubleValue0( i, bd1);
testDoubleValue0(-i, bd2);
checkFloat(bd1, (float)i);
checkFloat(bd2, -(float)i);
}
// Now check values that should not convert the same in double
for(long i = maxDblLong; i < Long.MAX_VALUE; i++) {
BigDecimal bd1 = new BigDecimal(i);
BigDecimal bd2 = new BigDecimal(-i);
checkDouble(bd1, (double)i);
checkDouble(bd2, -(double)i);
checkFloat(bd1, (float)i);
checkFloat(bd2, -(float)i);
}
checkDouble(new BigDecimal(Long.MIN_VALUE), (double)Long.MIN_VALUE);
checkDouble(new BigDecimal(Long.MAX_VALUE), (double)Long.MAX_VALUE);
}
static void testFloatValue() {
// Now check values that should not convert the same in float
for(long i = maxFltLong; i <= Integer.MAX_VALUE; i++) {
BigDecimal bd1 = new BigDecimal(i);
BigDecimal bd2 = new BigDecimal(-i);
checkFloat(bd1, (float)i);
checkFloat(bd2, -(float)i);
testDoubleValue0( i, bd1);
testDoubleValue0(-i, bd2);
}
}
static void testFloatValue1() {
checkFloat(new BigDecimal("85070591730234615847396907784232501249"), 8.507059e+37f);
checkFloat(new BigDecimal("7784232501249e12"), 7.7842326e24f);
checkFloat(new BigDecimal("907784232501249e-12"),907.78424f);
checkFloat(new BigDecimal("7784e8"),7.7839997e11f);
checkFloat(new BigDecimal("9077e-8"),9.077e-5f);
}
static void testDoubleValue1() {
checkDouble(new BigDecimal("85070591730234615847396907784232501249"), 8.507059173023462e37);
checkDouble(new BigDecimal("7784232501249e12"), 7.784232501249e24);
checkDouble(new BigDecimal("907784232501249e-12"), 907.784232501249);
checkDouble(new BigDecimal("7784e8"), 7.784e11);
checkDouble(new BigDecimal("9077e-8"), 9.077e-5);
}
public static void main(String[] args) throws Exception {
testFloatDoubleValue();
testDoubleValue();
testFloatValue();
testFloatValue1();
testDoubleValue1();
}
}
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