Mercurial > hg > truffle
diff graal/com.oracle.jvmci.asm/src/com/oracle/jvmci/asm/NumUtil.java @ 21708:6df25b1418be
moved com.oracle.asm.** to jvmci-util.jar (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 03 Jun 2015 18:06:44 +0200 |
parents | graal/com.oracle.graal.asm/src/com/oracle/graal/asm/NumUtil.java@feca840a7d81 |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.asm/src/com/oracle/jvmci/asm/NumUtil.java Wed Jun 03 18:06:44 2015 +0200 @@ -0,0 +1,112 @@ +/* + * Copyright (c) 2011, 2013, 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.jvmci.asm; + +// JaCoCo Exclude + +/** + * A collection of static utility functions that check ranges of numbers. + */ +public class NumUtil { + + public static boolean isShiftCount(int x) { + return 0 <= x && x < 32; + } + + /** + * Determines if a given {@code int} value is the range of unsigned byte values. + */ + public static boolean isUByte(int x) { + return (x & 0xff) == x; + } + + /** + * Determines if a given {@code int} value is the range of signed byte values. + */ + public static boolean isByte(int x) { + return (byte) x == x; + } + + /** + * Determines if a given {@code long} value is the range of unsigned byte values. + */ + public static boolean isUByte(long x) { + return (x & 0xffL) == x; + } + + /** + * Determines if a given {@code long} value is the range of signed byte values. + */ + public static boolean isByte(long l) { + return (byte) l == l; + } + + /** + * Determines if a given {@code long} value is the range of unsigned int values. + */ + public static boolean isUInt(long x) { + return (x & 0xffffffffL) == x; + } + + /** + * Determines if a given {@code long} value is the range of signed int values. + */ + public static boolean isInt(long l) { + return (int) l == l; + } + + /** + * Determines if a given {@code int} value is the range of signed short values. + */ + public static boolean isShort(int x) { + return (short) x == x; + } + + /** + * Determines if a given {@code long} value is the range of signed short values. + */ + public static boolean isShort(long x) { + return (short) x == x; + } + + public static boolean isUShort(int s) { + return s == (s & 0xFFFF); + } + + public static boolean is32bit(long x) { + return -0x80000000L <= x && x < 0x80000000L; + } + + public static short safeToShort(int v) { + assert isShort(v); + return (short) v; + } + + public static int roundUp(int number, int mod) { + return ((number + mod - 1) / mod) * mod; + } + + public static long roundUp(long number, long mod) { + return ((number + mod - 1L) / mod) * mod; + } +}