Mercurial > hg > graal-jvmci-8
diff graal/com.oracle.max.cri/src/com/oracle/max/cri/intrinsics/UnsignedMath.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Sat, 17 Dec 2011 19:59:18 +0100 |
parents | |
children |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.max.cri/src/com/oracle/max/cri/intrinsics/UnsignedMath.java Sat Dec 17 19:59:18 2011 +0100 @@ -0,0 +1,142 @@ +/* + * 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 com.oracle.max.cri.intrinsics; + +import static com.oracle.max.cri.intrinsics.IntrinsicIDs.*; + +import java.math.*; + +import com.sun.max.annotate.*; + +/** + * {@link INTRINSIC} method definitions 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; + + /** + * @see IntrinsicIDs#UCMP_AT + */ + @INTRINSIC(UCMP_AT) + public static boolean aboveThan(int a, int b) { + return (a & MASK) > (b & MASK); + } + + /** + * @see IntrinsicIDs#UCMP_AE + */ + @INTRINSIC(UCMP_AE) + public static boolean aboveOrEqual(int a, int b) { + return (a & MASK) >= (b & MASK); + } + + /** + * @see IntrinsicIDs#UCMP_BT + */ + @INTRINSIC(UCMP_BT) + public static boolean belowThan(int a, int b) { + return (a & MASK) < (b & MASK); + } + + /** + * @see IntrinsicIDs#UCMP_BE + */ + @INTRINSIC(UCMP_BE) + public static boolean belowOrEqual(int a, int b) { + return (a & MASK) <= (b & MASK); + } + + + /** + * @see IntrinsicIDs#UCMP_AT + */ + @INTRINSIC(UCMP_AT) + public static boolean aboveThan(long a, long b) { + return (a > b) ^ ((a < 0) != (b < 0)); + } + + /** + * @see IntrinsicIDs#UCMP_AE + */ + @INTRINSIC(UCMP_AE) + public static boolean aboveOrEqual(long a, long b) { + return (a >= b) ^ ((a < 0) != (b < 0)); + } + + /** + * @see IntrinsicIDs#UCMP_BT + */ + @INTRINSIC(UCMP_BT) + public static boolean belowThan(long a, long b) { + return (a < b) ^ ((a < 0) != (b < 0)); + } + + /** + * @see IntrinsicIDs#UCMP_BE + */ + @INTRINSIC(UCMP_BE) + public static boolean belowOrEqual(long a, long b) { + return (a <= b) ^ ((a < 0) != (b < 0)); + } + + + /** + * @see IntrinsicIDs#UDIV + */ + @INTRINSIC(UDIV) + public static int divide(int a, int b) { + return (int) ((a & MASK) / (b & MASK)); + } + + /** + * @see IntrinsicIDs#UREM + */ + @INTRINSIC(UREM) + public static int remainder(int a, int b) { + return (int) ((a & MASK) % (b & MASK)); + } + + + /** + * @see IntrinsicIDs#UDIV + */ + @INTRINSIC(UDIV) + public static long divide(long a, long b) { + return bi(a).divide(bi(b)).longValue(); + } + + /** + * @see IntrinsicIDs#UREM + */ + @INTRINSIC(UREM) + 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); + } +} +