| /* | |
| * Copyright (c) 2015, 2022, 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 | |
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| */ | |
| import sun.java2d.marlin.FloatMath; | |
| /* | |
| * @test | |
| * @summary Check for correct implementation of FloatMath.ceil/floor | |
| * @run main CeilAndFloorTests | |
| * @modules java.desktop/sun.java2d.marlin | |
| */ | |
| public class CeilAndFloorTests { | |
| public static String toHexString(double f) { | |
| if (!Double.isNaN(f)) { | |
| return Double.toHexString(f); | |
| } else { | |
| return "NaN(0x" + Long.toHexString(Double.doubleToRawLongBits(f)) + ")"; | |
| } | |
| } | |
| public static int test(String testName, double input, | |
| double result, double expected) { | |
| if (Double.compare(expected, result) != 0) { | |
| System.err.println("Failure for " + testName + ":\n" + | |
| "\tFor input " + input + "\t(" + toHexString(input) + ")\n" + | |
| "\texpected " + expected + "\t(" + toHexString(expected) + ")\n" + | |
| "\tgot " + result + "\t(" + toHexString(result) + ")."); | |
| return 1; | |
| } | |
| else | |
| return 0; | |
| } | |
| public static int test_skip_0(String testName, double input, | |
| double result, double expected) | |
| { | |
| // floor_int does not distinguish +0f and -0f | |
| // but it is not critical for Marlin | |
| if (Double.compare(expected, result) != 0 && (expected != 0.0)) | |
| { | |
| System.err.println("Failure for " + testName + ":\n" + | |
| "\tFor input " + input + "\t(" + toHexString(input) + ")\n" + | |
| "\texpected " + expected + "\t(" + toHexString(expected) + ")\n" + | |
| "\tgot " + result + "\t(" + toHexString(result) + ")."); | |
| return 1; | |
| } | |
| else | |
| return 0; | |
| } | |
| private static int testCeilCase(double input, double expected) { | |
| int failures = 0; | |
| // int result: | |
| failures += test("FloatMath.ceil_int", input, FloatMath.ceil_int(input), (int)expected); | |
| return failures; | |
| } | |
| private static int testFloorCase(double input, double expected) { | |
| int failures = 0; | |
| // ignore difference between +0f and -0f: | |
| failures += test_skip_0("FloatMath.floor_int", input, FloatMath.floor_int(input), (int)expected); | |
| return failures; | |
| } | |
| private static int nearIntegerTests() { | |
| int failures = 0; | |
| double [] fixedPoints = { | |
| -0.0, | |
| 0.0, | |
| -1.0, | |
| 1.0, | |
| -0x1.0p52, | |
| 0x1.0p52, | |
| -Float.MAX_VALUE, | |
| Float.MAX_VALUE, | |
| Float.NEGATIVE_INFINITY, | |
| Float.POSITIVE_INFINITY, | |
| Float.NaN, | |
| }; | |
| for(double fixedPoint : fixedPoints) { | |
| failures += testCeilCase(fixedPoint, fixedPoint); | |
| failures += testFloorCase(fixedPoint, fixedPoint); | |
| } | |
| for(int i = Float.MIN_EXPONENT; i <= Float.MAX_EXPONENT; i++) { | |
| double powerOfTwo = Math.scalb(1.0f, i); | |
| double neighborDown = Math.nextDown(powerOfTwo); | |
| double neighborUp = Math.nextUp(powerOfTwo); | |
| if (i < 0) { | |
| failures += testCeilCase( powerOfTwo, 1.0); | |
| failures += testCeilCase(-powerOfTwo, -0.0); | |
| failures += testFloorCase( powerOfTwo, 0.0); | |
| failures += testFloorCase(-powerOfTwo, -1.0); | |
| failures += testCeilCase( neighborDown, 1.0); | |
| failures += testCeilCase(-neighborDown, -0.0); | |
| failures += testFloorCase( neighborUp, 0.0); | |
| failures += testFloorCase(-neighborUp, -1.0); | |
| } else { | |
| failures += testCeilCase(powerOfTwo, powerOfTwo); | |
| failures += testFloorCase(powerOfTwo, powerOfTwo); | |
| if (neighborDown==Math.rint(neighborDown)) { | |
| failures += testCeilCase( neighborDown, neighborDown); | |
| failures += testCeilCase(-neighborDown, -neighborDown); | |
| failures += testFloorCase( neighborDown, neighborDown); | |
| failures += testFloorCase(-neighborDown,-neighborDown); | |
| } else { | |
| failures += testCeilCase( neighborDown, powerOfTwo); | |
| failures += testFloorCase(-neighborDown, -powerOfTwo); | |
| } | |
| if (neighborUp==Math.rint(neighborUp)) { | |
| failures += testCeilCase(neighborUp, neighborUp); | |
| failures += testCeilCase(-neighborUp, -neighborUp); | |
| failures += testFloorCase(neighborUp, neighborUp); | |
| failures += testFloorCase(-neighborUp, -neighborUp); | |
| } else { | |
| failures += testFloorCase(neighborUp, powerOfTwo); | |
| failures += testCeilCase(-neighborUp, -powerOfTwo); | |
| } | |
| } | |
| } | |
| for(int i = -(0x10000); i <= 0x10000; i++) { | |
| double f = (double) i; | |
| double neighborDown = Math.nextDown(f); | |
| double neighborUp = Math.nextUp(f); | |
| failures += testCeilCase( f, f); | |
| failures += testCeilCase(-f, -f); | |
| failures += testFloorCase( f, f); | |
| failures += testFloorCase(-f, -f); | |
| if (Math.abs(f) > 1.0) { | |
| failures += testCeilCase( neighborDown, f); | |
| failures += testCeilCase(-neighborDown, -f+1); | |
| failures += testFloorCase( neighborUp, f); | |
| failures += testFloorCase(-neighborUp, -f-1); | |
| } | |
| } | |
| return failures; | |
| } | |
| public static int roundingTests() { | |
| int failures = 0; | |
| double [][] testCases = { | |
| { Float.MIN_VALUE, 1.0}, | |
| {-Float.MIN_VALUE, -0.0}, | |
| { Math.nextDown(Float.MIN_NORMAL), 1.0}, | |
| {-Math.nextDown(Float.MIN_NORMAL), -0.0}, | |
| { Float.MIN_NORMAL, 1.0}, | |
| {-Float.MIN_NORMAL, -0.0}, | |
| { 0.1, 1.0}, | |
| {-0.1, -0.0}, | |
| { 0.5, 1.0}, | |
| {-0.5, -0.0}, | |
| { 1.5, 2.0}, | |
| {-1.5, -1.0}, | |
| { 2.5, 3.0}, | |
| {-2.5, -2.0}, | |
| { 12.3456789, 13.0}, | |
| {-12.3456789, -12.0}, | |
| { Math.nextDown(1.0), 1.0}, | |
| { Math.nextDown(-1.0), -1.0}, | |
| { Math.nextUp(1.0), 2.0}, | |
| { Math.nextUp(-1.0), -0.0}, | |
| { 0x1.0p22, 0x1.0p22}, | |
| {-0x1.0p22, -0x1.0p22}, | |
| { Math.nextDown(0x1.0p22), 0x1.0p22}, | |
| {-Math.nextUp(0x1.0p22), -0x1.0p22}, | |
| { Math.nextUp(0x1.0p22), 0x1.0p22 + 1.0}, | |
| {-Math.nextDown(0x1.0p22), -0x1.0p22 + 1.0} | |
| }; | |
| for(double[] testCase : testCases) { | |
| failures += testCeilCase(testCase[0], testCase[1]); | |
| failures += testFloorCase(-testCase[0], -testCase[1]); | |
| } | |
| return failures; | |
| } | |
| public static void main(String... args) { | |
| int failures = 0; | |
| System.out.println("nearIntegerTests"); | |
| failures += nearIntegerTests(); | |
| System.out.println("roundingTests"); | |
| failures += roundingTests(); | |
| if (failures > 0) { | |
| System.err.println("Testing {FloatMath}.ceil/floor incurred " | |
| + failures + " failures."); | |
| throw new RuntimeException(); | |
| } | |
| } | |
| } |