Mercurial > hg > graal-jvmci-8
annotate graal/com.oracle.graal.asm/src/com/oracle/graal/asm/NumUtil.java @ 10910:b61c13ad27d0
use aligned memory accesses for vectorized array copy
author | twisti |
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date | Mon, 29 Jul 2013 17:13:00 -0700 |
parents | 5e3d1a68664e |
children | feca840a7d81 |
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1 /* |
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2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.graal.asm; |
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24 |
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25 // JaCoCo Exclude |
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26 |
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27 /** |
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28 * A collection of static utility functions that check ranges of numbers. |
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29 */ |
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30 public class NumUtil { |
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31 |
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32 public static boolean isShiftCount(int x) { |
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33 return 0 <= x && x < 32; |
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34 } |
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35 |
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36 /** |
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37 * Determines if a given {@code int} value is the range of unsigned byte values. |
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38 */ |
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39 public static boolean isUByte(int x) { |
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40 return (x & 0xff) == x; |
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41 } |
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42 |
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43 /** |
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44 * Determines if a given {@code int} value is the range of signed byte values. |
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45 */ |
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46 public static boolean isByte(int x) { |
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47 return (byte) x == x; |
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48 } |
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49 |
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50 /** |
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51 * Determines if a given {@code long} value is the range of unsigned byte values. |
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52 */ |
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53 public static boolean isUByte(long x) { |
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54 return (x & 0xffL) == x; |
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55 } |
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56 |
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57 /** |
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58 * Determines if a given {@code long} value is the range of signed byte values. |
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59 */ |
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60 public static boolean isByte(long l) { |
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61 return (byte) l == l; |
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62 } |
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63 |
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64 /** |
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65 * Determines if a given {@code long} value is the range of unsigned int values. |
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66 */ |
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67 public static boolean isUInt(long x) { |
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68 return (x & 0xffffffffL) == x; |
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69 } |
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70 |
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71 /** |
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72 * Determines if a given {@code long} value is the range of signed int values. |
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73 */ |
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74 public static boolean isInt(long l) { |
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75 return (int) l == l; |
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76 } |
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77 |
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78 /** |
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79 * Determines if a given {@code int} value is the range of signed short values. |
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80 */ |
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81 public static boolean isShort(int x) { |
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82 return (short) x == x; |
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83 } |
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84 |
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85 public static boolean isUShort(int s) { |
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86 return s == (s & 0xFFFF); |
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87 } |
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88 |
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89 public static boolean is32bit(long x) { |
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90 return -0x80000000L <= x && x < 0x80000000L; |
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91 } |
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92 |
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93 public static short safeToShort(int v) { |
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94 assert isShort(v); |
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95 return (short) v; |
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96 } |
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97 |
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98 public static int roundUp(int number, int mod) { |
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99 return ((number + mod - 1) / mod) * mod; |
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100 } |
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101 |
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102 public static long roundUp(long number, long mod) { |
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103 return ((number + mod - 1L) / mod) * mod; |
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104 } |
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105 } |