/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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// Note that $opt$ is a marker for the optimizing compiler to test
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// it does compile the method, and that $noinline$ is a marker to
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// test that it does not inline it.
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public class NegTest {
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public static void assertEquals(int expected, int result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertEquals(long expected, long result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertEquals(float expected, float result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertEquals(String expected, float result) {
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if (!expected.equals(new Float(result).toString())) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertEquals(double expected, double result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertEquals(String expected, double result) {
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if (!expected.equals(new Double(result).toString())) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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public static void assertIsNaN(float result) {
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if (!Float.isNaN(result)) {
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throw new Error("Expected NaN: " + result);
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}
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}
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public static void assertIsNaN(double result) {
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if (!Double.isNaN(result)) {
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throw new Error("Expected NaN: " + result);
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}
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}
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public static void main() {
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negInt();
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$opt$noinline$InplaceNegOneInt(1);
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negLong();
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$opt$noinline$InplaceNegOneLong(1L);
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negFloat();
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negDouble();
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}
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private static void negInt() {
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assertEquals(-1, $opt$noinline$NegInt(1));
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assertEquals(1, $opt$noinline$NegInt(-1));
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assertEquals(0, $opt$noinline$NegInt(0));
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assertEquals(51, $opt$noinline$NegInt(-51));
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assertEquals(-51, $opt$noinline$NegInt(51));
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assertEquals(2147483647, $opt$noinline$NegInt(-2147483647)); // -(2^31 - 1)
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assertEquals(-2147483647, $opt$noinline$NegInt(2147483647)); // 2^31 - 1
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// From the Java 7 SE Edition specification:
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// http://docs.oracle.com/javase/specs/jls/se7/html/jls-15.html#jls-15.15.4
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//
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// For integer values, negation is the same as subtraction from
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// zero. The Java programming language uses two's-complement
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// representation for integers, and the range of two's-complement
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// values is not symmetric, so negation of the maximum negative
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// int or long results in that same maximum negative number.
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// Overflow occurs in this case, but no exception is thrown.
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// For all integer values x, -x equals (~x)+1.''
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assertEquals(-2147483648, $opt$noinline$NegInt(-2147483648)); // -(2^31)
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}
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private static void negLong() {
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assertEquals(-1L, $opt$noinline$NegLong(1L));
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assertEquals(1L, $opt$noinline$NegLong(-1L));
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assertEquals(0L, $opt$noinline$NegLong(0L));
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assertEquals(51L, $opt$noinline$NegLong(-51L));
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assertEquals(-51L, $opt$noinline$NegLong(51L));
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assertEquals(2147483647L, $opt$noinline$NegLong(-2147483647L)); // -(2^31 - 1)
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assertEquals(-2147483647L, $opt$noinline$NegLong(2147483647L)); // (2^31 - 1)
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assertEquals(2147483648L, $opt$noinline$NegLong(-2147483648L)); // -(2^31)
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assertEquals(-2147483648L, $opt$noinline$NegLong(2147483648L)); // 2^31
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assertEquals(9223372036854775807L, $opt$noinline$NegLong(-9223372036854775807L)); // -(2^63 - 1)
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assertEquals(-9223372036854775807L, $opt$noinline$NegLong(9223372036854775807L)); // 2^63 - 1
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// See remark regarding the negation of the maximum negative
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// (long) value in negInt().
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assertEquals(-9223372036854775808L, $opt$noinline$NegLong(-9223372036854775808L)); // -(2^63)
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}
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private static void negFloat() {
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assertEquals("-0.0", $opt$noinline$NegFloat(0F));
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assertEquals("0.0", $opt$noinline$NegFloat(-0F));
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assertEquals(-1F, $opt$noinline$NegFloat(1F));
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assertEquals(1F, $opt$noinline$NegFloat(-1F));
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assertEquals(51F, $opt$noinline$NegFloat(-51F));
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assertEquals(-51F, $opt$noinline$NegFloat(51F));
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assertEquals(-0.1F, $opt$noinline$NegFloat(0.1F));
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assertEquals(0.1F, $opt$noinline$NegFloat(-0.1F));
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assertEquals(343597.38362F, $opt$noinline$NegFloat(-343597.38362F));
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assertEquals(-343597.38362F, $opt$noinline$NegFloat(343597.38362F));
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assertEquals(-Float.MIN_NORMAL, $opt$noinline$NegFloat(Float.MIN_NORMAL));
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assertEquals(Float.MIN_NORMAL, $opt$noinline$NegFloat(-Float.MIN_NORMAL));
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assertEquals(-Float.MIN_VALUE, $opt$noinline$NegFloat(Float.MIN_VALUE));
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assertEquals(Float.MIN_VALUE, $opt$noinline$NegFloat(-Float.MIN_VALUE));
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assertEquals(-Float.MAX_VALUE, $opt$noinline$NegFloat(Float.MAX_VALUE));
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assertEquals(Float.MAX_VALUE, $opt$noinline$NegFloat(-Float.MAX_VALUE));
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assertEquals(Float.NEGATIVE_INFINITY, $opt$noinline$NegFloat(Float.POSITIVE_INFINITY));
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assertEquals(Float.POSITIVE_INFINITY, $opt$noinline$NegFloat(Float.NEGATIVE_INFINITY));
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assertIsNaN($opt$noinline$NegFloat(Float.NaN));
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}
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private static void negDouble() {
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assertEquals("-0.0", $opt$noinline$NegDouble(0D));
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assertEquals("0.0", $opt$noinline$NegDouble(-0D));
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assertEquals(-1D, $opt$noinline$NegDouble(1D));
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assertEquals(1D, $opt$noinline$NegDouble(-1D));
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assertEquals(51D, $opt$noinline$NegDouble(-51D));
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assertEquals(-51D, $opt$noinline$NegDouble(51D));
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assertEquals(-0.1D, $opt$noinline$NegDouble(0.1D));
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assertEquals(0.1D, $opt$noinline$NegDouble(-0.1D));
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assertEquals(343597.38362D, $opt$noinline$NegDouble(-343597.38362D));
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assertEquals(-343597.38362D, $opt$noinline$NegDouble(343597.38362D));
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assertEquals(-Double.MIN_NORMAL, $opt$noinline$NegDouble(Double.MIN_NORMAL));
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assertEquals(Double.MIN_NORMAL, $opt$noinline$NegDouble(-Double.MIN_NORMAL));
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assertEquals(-Double.MIN_VALUE, $opt$noinline$NegDouble(Double.MIN_VALUE));
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assertEquals(Double.MIN_VALUE, $opt$noinline$NegDouble(-Double.MIN_VALUE));
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assertEquals(-Double.MAX_VALUE, $opt$noinline$NegDouble(Double.MAX_VALUE));
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assertEquals(Double.MAX_VALUE, $opt$noinline$NegDouble(-Double.MAX_VALUE));
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assertEquals(Double.NEGATIVE_INFINITY, $opt$noinline$NegDouble(Double.POSITIVE_INFINITY));
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assertEquals(Double.POSITIVE_INFINITY, $opt$noinline$NegDouble(Double.NEGATIVE_INFINITY));
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assertIsNaN($opt$noinline$NegDouble(Double.NaN));
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}
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private static void $opt$noinline$InplaceNegOneInt(int a) {
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a = -a;
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assertEquals(-1, a);
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}
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private static void $opt$noinline$InplaceNegOneLong(long a) {
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a = -a;
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assertEquals(-1L, a);
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}
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private static int $opt$noinline$NegInt(int a){
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return -a;
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}
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private static long $opt$noinline$NegLong(long a){
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return -a;
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}
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private static float $opt$noinline$NegFloat(float a){
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return -a;
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}
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private static double $opt$noinline$NegDouble(double a){
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return -a;
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}
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}
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