--- old/src/jdk.vm.ci/share/classes/jdk.vm.ci.code/src/jdk/vm/ci/code/UnsignedMath.java 2015-11-02 17:07:42.000000000 -1000 +++ /dev/null 2015-11-02 17:07:42.000000000 -1000 @@ -1,124 +0,0 @@ -/* - * Copyright (c) 2011, 2011, 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. - */ -package jdk.vm.ci.code; - -import java.math.*; - -//JaCoCo Exclude - -/** - * Utilities for unsigned comparisons. All methods have correct, but slow, standard Java - * implementations so that they can be used with compilers not supporting the intrinsics. - */ -public class UnsignedMath { - - private static final long MASK = 0xffffffffL; - - /** - * Unsigned comparison aboveThan for two numbers. - */ - public static boolean aboveThan(int a, int b) { - return (a & MASK) > (b & MASK); - } - - /** - * Unsigned comparison aboveOrEqual for two numbers. - */ - public static boolean aboveOrEqual(int a, int b) { - return (a & MASK) >= (b & MASK); - } - - /** - * Unsigned comparison belowThan for two numbers. - */ - public static boolean belowThan(int a, int b) { - return (a & MASK) < (b & MASK); - } - - /** - * Unsigned comparison belowOrEqual for two numbers. - */ - public static boolean belowOrEqual(int a, int b) { - return (a & MASK) <= (b & MASK); - } - - /** - * Unsigned comparison aboveThan for two numbers. - */ - public static boolean aboveThan(long a, long b) { - return (a > b) ^ ((a < 0) != (b < 0)); - } - - /** - * Unsigned comparison aboveOrEqual for two numbers. - */ - public static boolean aboveOrEqual(long a, long b) { - return (a >= b) ^ ((a < 0) != (b < 0)); - } - - /** - * Unsigned comparison belowThan for two numbers. - */ - public static boolean belowThan(long a, long b) { - return (a < b) ^ ((a < 0) != (b < 0)); - } - - /** - * Unsigned comparison belowOrEqual for two numbers. - */ - public static boolean belowOrEqual(long a, long b) { - return (a <= b) ^ ((a < 0) != (b < 0)); - } - - /** - * Unsigned division for two numbers. - */ - public static int divide(int a, int b) { - return (int) ((a & MASK) / (b & MASK)); - } - - /** - * Unsigned remainder for two numbers. - */ - public static int remainder(int a, int b) { - return (int) ((a & MASK) % (b & MASK)); - } - - /** - * Unsigned division for two numbers. - */ - public static long divide(long a, long b) { - return bi(a).divide(bi(b)).longValue(); - } - - /** - * Unsigned remainder for two numbers. - */ - public static long remainder(long a, long b) { - return bi(a).remainder(bi(b)).longValue(); - } - - private static BigInteger bi(long unsigned) { - return unsigned >= 0 ? BigInteger.valueOf(unsigned) : BigInteger.valueOf(unsigned & 0x7fffffffffffffffL).setBit(63); - } -}