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8302800: Augment NaN handling tests of FDLIBM methods
Reviewed-by: mbaesken Backport-of: dfce4e1943f2f95b74b5a9cdde9d738dcffd0b43
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Amos Shi
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Aug 26, 2024
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| /* | ||
| * Copyright (c) 2003, 2023, 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 8302026 | ||
| * @build Tests | ||
| * @build InverseTrigTests | ||
| * @run main InverseTrigTests | ||
| * @summary Tests for {Math, StrictMath}.{asin, acos, atan} | ||
| */ | ||
|
|
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| import static java.lang.Double.longBitsToDouble; | ||
|
|
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| public class InverseTrigTests { | ||
| private InverseTrigTests(){} | ||
|
|
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| public static void main(String... args) { | ||
| int failures = 0; | ||
|
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| failures += testAsinSpecialCases(); | ||
| failures += testAcosSpecialCases(); | ||
| failures += testAtanSpecialCases(); | ||
|
|
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| if (failures > 0) { | ||
| System.err.println("Testing inverse trig mthods incurred " | ||
| + failures + " failures."); | ||
| throw new RuntimeException(); | ||
| } | ||
| } | ||
|
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| private static final double InfinityD = Double.POSITIVE_INFINITY; | ||
| private static final double NaNd = Double.NaN; | ||
|
|
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| /** | ||
| * From the spec for Math.asin: | ||
| * | ||
| * "Special cases: | ||
| * | ||
| * If the argument is NaN or its absolute value is greater than 1, | ||
| * then the result is NaN. | ||
| * | ||
| * If the argument is zero, then the result is a zero with the | ||
| * same sign as the argument." | ||
| */ | ||
| private static int testAsinSpecialCases() { | ||
| int failures = 0; | ||
|
|
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| for(double nan : Tests.NaNs) { | ||
| failures += testAsinCase(nan, NaNd); | ||
| } | ||
|
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| double [][] testCases = { | ||
| {Math.nextUp(1.0), NaNd}, | ||
| {Math.nextDown(-1.0), NaNd}, | ||
| { InfinityD, NaNd}, | ||
| {-InfinityD, NaNd}, | ||
|
|
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| {-0.0, -0.0}, | ||
| {+0.0, +0.0}, | ||
| }; | ||
|
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| for(int i = 0; i < testCases.length; i++) { | ||
| failures += testAsinCase(testCases[i][0], | ||
| testCases[i][1]); | ||
| } | ||
|
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| return failures; | ||
| } | ||
|
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| private static int testAsinCase(double input, double expected) { | ||
| int failures=0; | ||
|
|
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| failures += Tests.test("Math.asin", input, Math::asin, expected); | ||
| failures += Tests.test("StrictMath.asin", input, StrictMath::asin, expected); | ||
|
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| return failures; | ||
| } | ||
|
|
||
| /** | ||
| * From the spec for Math.acos: | ||
| * | ||
| * "Special case: | ||
| * | ||
| * If the argument is NaN or its absolute value is greater than 1, | ||
| * then the result is NaN. | ||
| * | ||
| * If the argument is 1.0, the result is positive zero." | ||
| */ | ||
| private static int testAcosSpecialCases() { | ||
| int failures = 0; | ||
|
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| for(double nan : Tests.NaNs) { | ||
| failures += testAcosCase(nan, NaNd); | ||
| } | ||
|
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| double [][] testCases = { | ||
| {Math.nextUp(1.0), NaNd}, | ||
| {Math.nextDown(-1.0), NaNd}, | ||
| {InfinityD, NaNd}, | ||
| {-InfinityD, NaNd}, | ||
|
|
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| {1.0, +0.0}, | ||
| }; | ||
|
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| for(int i = 0; i < testCases.length; i++) { | ||
| failures += testAcosCase(testCases[i][0], | ||
| testCases[i][1]); | ||
| } | ||
|
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| return failures; | ||
| } | ||
|
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| private static int testAcosCase(double input, double expected) { | ||
| int failures=0; | ||
|
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| failures += Tests.test("Math.acos", input, Math::acos, expected); | ||
| failures += Tests.test("StrictMath.acos", input, StrictMath::acos, expected); | ||
|
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| return failures; | ||
| } | ||
|
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| /** | ||
| * From the spec for Math.atan: | ||
| * | ||
| * "Special cases: | ||
| * | ||
| * If the argument is NaN, then the result is NaN. | ||
| * | ||
| * If the argument is zero, then the result is a zero with the | ||
| * same sign as the argument. | ||
| * | ||
| * If the argument is infinite, then the result is the closest | ||
| * value to pi/2 with the same sign as the input." | ||
| */ | ||
| private static int testAtanSpecialCases() { | ||
| int failures = 0; | ||
|
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| for(double nan : Tests.NaNs) { | ||
| failures += testAtanCase(nan, NaNd); | ||
| } | ||
|
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| double [][] testCases = { | ||
| {-0.0, -0.0}, | ||
| {+0.0, +0.0}, | ||
|
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| { InfinityD, +Math.PI/2.0}, | ||
| {-InfinityD, -Math.PI/2.0}, | ||
| }; | ||
|
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| for(int i = 0; i < testCases.length; i++) { | ||
| failures += testAtanCase(testCases[i][0], | ||
| testCases[i][1]); | ||
| } | ||
|
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| return failures; | ||
| } | ||
|
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| private static int testAtanCase(double input, double expected) { | ||
| int failures=0; | ||
|
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| failures += Tests.test("Math.atan", input, Math::atan, expected); | ||
| failures += Tests.test("StrictMath.atan", input, StrictMath::atan, expected); | ||
|
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| return failures; | ||
| } | ||
| } |
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