Mercurial > hg > graal-compiler
view graal/com.oracle.max.asm/src/com/oracle/max/asm/NumUtil.java @ 4387:1bd28959b8b8
Merge.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
---|---|
date | Sat, 28 Jan 2012 00:40:18 +0100 |
parents | e233f5660da4 |
children | 681e969888a7 |
line wrap: on
line source
/* * 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.asm; /** * 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; } 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; } }