| /* |
| * Copyright (c) 2015, 2016, 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. |
| */ |
| |
| 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(float f) { |
| if (!Float.isNaN(f)) |
| return Float.toHexString(f); |
| else |
| return "NaN(0x" + Integer.toHexString(Float.floatToRawIntBits(f)) + ")"; |
| } |
| |
| public static int test(String testName, float input, |
| float result, float expected) { |
| if (Float.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, float input, |
| float result, float expected) |
| { |
| // floor_int does not distinguish +0f and -0f |
| // but it is not critical for Marlin |
| if (Float.compare(expected, result) != 0 && (expected != 0f)) |
| { |
| 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(float input, float expected) { |
| int failures = 0; |
| // float result: |
| failures += test("FloatMath.ceil_f", input, FloatMath.ceil_f(input), expected); |
| // int result: |
| failures += test("FloatMath.ceil_int", input, FloatMath.ceil_int(input), (int)expected); |
| failures += test("FloatMath.ceil_f (int)", input, (int)FloatMath.ceil_f(input), (int)expected); |
| return failures; |
| } |
| |
| private static int testFloorCase(float input, float expected) { |
| int failures = 0; |
| // float result: |
| failures += test ("FloatMath.floor_f", input, FloatMath.floor_f(input), expected); |
| // ignore difference between +0f and -0f: |
| failures += test_skip_0("FloatMath.floor_int", input, FloatMath.floor_int(input), (int)expected); |
| failures += test_skip_0("FloatMath.floor_f (int)", input, (int)FloatMath.floor_f(input), (int)expected); |
| return failures; |
| } |
| |
| private static int nearIntegerTests() { |
| int failures = 0; |
| |
| float [] fixedPoints = { |
| -0.0f, |
| 0.0f, |
| -1.0f, |
| 1.0f, |
| -0x1.0p52f, |
| 0x1.0p52f, |
| -Float.MAX_VALUE, |
| Float.MAX_VALUE, |
| Float.NEGATIVE_INFINITY, |
| Float.POSITIVE_INFINITY, |
| Float.NaN, |
| }; |
| |
| for(float fixedPoint : fixedPoints) { |
| failures += testCeilCase(fixedPoint, fixedPoint); |
| failures += testFloorCase(fixedPoint, fixedPoint); |
| } |
| |
| for(int i = Float.MIN_EXPONENT; i <= Float.MAX_EXPONENT; i++) { |
| float powerOfTwo = Math.scalb(1.0f, i); |
| float neighborDown = Math.nextDown(powerOfTwo); |
| float neighborUp = Math.nextUp(powerOfTwo); |
| |
| if (i < 0) { |
| failures += testCeilCase( powerOfTwo, 1.0f); |
| failures += testCeilCase(-powerOfTwo, -0.0f); |
| |
| failures += testFloorCase( powerOfTwo, 0.0f); |
| failures += testFloorCase(-powerOfTwo, -1.0f); |
| |
| failures += testCeilCase( neighborDown, 1.0f); |
| failures += testCeilCase(-neighborDown, -0.0f); |
| |
| failures += testFloorCase( neighborUp, 0.0f); |
| failures += testFloorCase(-neighborUp, -1.0f); |
| } 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++) { |
| float f = (float) i; |
| float neighborDown = Math.nextDown(f); |
| float 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; |
| float [][] testCases = { |
| { Float.MIN_VALUE, 1.0f}, |
| {-Float.MIN_VALUE, -0.0f}, |
| { Math.nextDown(Float.MIN_NORMAL), 1.0f}, |
| {-Math.nextDown(Float.MIN_NORMAL), -0.0f}, |
| { Float.MIN_NORMAL, 1.0f}, |
| {-Float.MIN_NORMAL, -0.0f}, |
| |
| { 0.1f, 1.0f}, |
| {-0.1f, -0.0f}, |
| |
| { 0.5f, 1.0f}, |
| {-0.5f, -0.0f}, |
| |
| { 1.5f, 2.0f}, |
| {-1.5f, -1.0f}, |
| |
| { 2.5f, 3.0f}, |
| {-2.5f, -2.0f}, |
| |
| { 12.3456789f, 13.0f}, |
| {-12.3456789f, -12.0f}, |
| |
| { Math.nextDown(1.0f), 1.0f}, |
| { Math.nextDown(-1.0f), -1.0f}, |
| |
| { Math.nextUp(1.0f), 2.0f}, |
| { Math.nextUp(-1.0f), -0.0f}, |
| |
| { 0x1.0p22f, 0x1.0p22f}, |
| {-0x1.0p22f, -0x1.0p22f}, |
| |
| { Math.nextDown(0x1.0p22f), 0x1.0p22f}, |
| {-Math.nextUp(0x1.0p22f), -0x1.0p22f}, |
| |
| { Math.nextUp(0x1.0p22f), 0x1.0p22f+1f}, |
| {-Math.nextDown(0x1.0p22f), -0x1.0p22f+1f}, |
| |
| { Math.nextDown(0x1.0p23f), 0x1.0p23f}, |
| {-Math.nextUp(0x1.0p23f), -0x1.0p23f-1f}, |
| |
| { Math.nextUp(0x1.0p23f), 0x1.0p23f+1f}, |
| {-Math.nextDown(0x1.0p23f), -0x1.0p23f+1f}, |
| }; |
| |
| for(float[] 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(); |
| } |
| } |
| } |