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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
public class TestIsNan {
/// CHECK-START: boolean TestIsNan.isNaN32(float) builder (after)
/// CHECK-DAG: <<Result:z\d+>> NotEqual
/// CHECK-DAG: Return [<<Result>>]
//
/// CHECK-START: boolean TestIsNan.isNaN32(float) builder (after)
/// CHECK-NOT: InvokeStaticOrDirect
private static boolean isNaN32(float x) {
return Float.isNaN(x);
}
/// CHECK-START: boolean TestIsNan.isNaN64(double) builder (after)
/// CHECK-DAG: <<Result:z\d+>> NotEqual
/// CHECK-DAG: Return [<<Result>>]
//
/// CHECK-START: boolean TestIsNan.isNaN64(double) builder (after)
/// CHECK-NOT: InvokeStaticOrDirect
private static boolean isNaN64(double x) {
return Double.isNaN(x);
}
public static void main() {
// A few distinct numbers.
expectFalse(isNaN32(Float.NEGATIVE_INFINITY));
expectFalse(isNaN32(-1.0f));
expectFalse(isNaN32(-0.0f));
expectFalse(isNaN32(0.0f));
expectFalse(isNaN32(1.0f));
expectFalse(isNaN32(Float.POSITIVE_INFINITY));
// A few distinct subnormal numbers.
expectFalse(isNaN32(Float.intBitsToFloat(0x00400000)));
expectFalse(isNaN32(Float.intBitsToFloat(0x80400000)));
expectFalse(isNaN32(Float.intBitsToFloat(0x00000001)));
expectFalse(isNaN32(Float.intBitsToFloat(0x80000001)));
// A few NaN numbers.
expectTrue(isNaN32(Float.NaN));
expectTrue(isNaN32(0.0f / 0.0f));
expectTrue(isNaN32((float)Math.sqrt(-1.0f)));
float[] fvals = {
Float.intBitsToFloat(0x7f800001),
Float.intBitsToFloat(0x7fa00000),
Float.intBitsToFloat(0x7fc00000),
Float.intBitsToFloat(0x7fffffff),
Float.intBitsToFloat(0xff800001),
Float.intBitsToFloat(0xffa00000),
Float.intBitsToFloat(0xffc00000),
Float.intBitsToFloat(0xffffffff)
};
for (int i = 0; i < fvals.length; i++) {
expectTrue(isNaN32(fvals[i]));
}
// A few distinct numbers.
expectFalse(isNaN64(Double.NEGATIVE_INFINITY));
expectFalse(isNaN32(-1.0f));
expectFalse(isNaN64(-0.0d));
expectFalse(isNaN64(0.0d));
expectFalse(isNaN64(1.0d));
expectFalse(isNaN64(Double.POSITIVE_INFINITY));
// A few distinct subnormal numbers.
expectFalse(isNaN64(Double.longBitsToDouble(0x0008000000000000l)));
expectFalse(isNaN64(Double.longBitsToDouble(0x8008000000000000l)));
expectFalse(isNaN64(Double.longBitsToDouble(0x0000000000000001l)));
expectFalse(isNaN64(Double.longBitsToDouble(0x8000000000000001l)));
// A few NaN numbers.
expectTrue(isNaN64(Double.NaN));
expectTrue(isNaN64(0.0d / 0.0d));
expectTrue(isNaN64(Math.sqrt(-1.0d)));
double[] dvals = {
Double.longBitsToDouble(0x7ff0000000000001L),
Double.longBitsToDouble(0x7ff4000000000000L),
Double.longBitsToDouble(0x7ff8000000000000L),
Double.longBitsToDouble(0x7fffffffffffffffL),
Double.longBitsToDouble(0xfff0000000000001L),
Double.longBitsToDouble(0xfff4000000000000L),
Double.longBitsToDouble(0xfff8000000000000L),
Double.longBitsToDouble(0xffffffffffffffffL)
};
for (int i = 0; i < dvals.length; i++) {
expectTrue(isNaN64(dvals[i]));
}
System.out.println("TestIsNan passed");
}
private static void expectTrue(boolean value) {
if (!value) {
throw new Error("Expected True");
}
}
private static void expectFalse(boolean value) {
if (value) {
throw new Error("Expected False");
}
}
}