Mercurial > hg > truffle
annotate graal/com.oracle.graal.snippets/src/com/oracle/graal/snippets/MathSnippetsX86.java @ 6382:9b6b8626983a
factored out access to LIRGenerator lock scope for external use in LIR lowering
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 13 Sep 2012 11:05:37 +0200 |
parents | 8e6622e1fb7e |
children | 2a0c9f20baa1 |
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1 /* |
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2 * Copyright (c) 2011, 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.snippets; |
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24 |
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25 import com.oracle.graal.api.code.*; |
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26 import com.oracle.graal.nodes.extended.*; |
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27 import com.oracle.graal.snippets.nodes.*; |
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28 import com.oracle.graal.snippets.nodes.MathIntrinsicNode.Operation; |
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29 |
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30 /** |
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31 * Snippets for {@link java.lang.Math} methods. |
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32 */ |
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33 @ClassSubstitution(java.lang.Math.class) |
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34 public class MathSnippetsX86 implements SnippetsInterface { |
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35 |
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36 private static final double PI_4 = 0.7853981633974483; |
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37 |
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38 public static double abs(double x) { |
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39 return MathIntrinsicNode.compute(x, Operation.ABS); |
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40 } |
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41 |
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42 public static double sqrt(double x) { |
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43 return MathIntrinsicNode.compute(x, Operation.SQRT); |
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44 } |
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45 |
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46 public static double log(double x) { |
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47 return MathIntrinsicNode.compute(x, Operation.LOG); |
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48 } |
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49 |
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50 public static double log10(double x) { |
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51 return MathIntrinsicNode.compute(x, Operation.LOG10); |
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52 } |
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53 |
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54 // NOTE on snippets below: |
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55 // Math.sin(), .cos() and .tan() guarantee a value within 1 ULP of the |
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56 // exact result, but x87 trigonometric FPU instructions are only that |
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57 // accurate within [-pi/4, pi/4]. Examine the passed value and provide |
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58 // a slow path for inputs outside of that interval. |
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59 |
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60 public static double sin(double x) { |
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61 if (abs(x) < PI_4) { |
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62 return MathIntrinsicNode.compute(x, Operation.SIN); |
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63 } else { |
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64 return RuntimeCallNode.callDouble(RuntimeCall.ArithmeticSin, x); |
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65 } |
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66 } |
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67 |
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68 public static double cos(double x) { |
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69 if (abs(x) < PI_4) { |
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70 return MathIntrinsicNode.compute(x, Operation.COS); |
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71 } else { |
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72 return RuntimeCallNode.callDouble(RuntimeCall.ArithmeticCos, x); |
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73 } |
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74 } |
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75 |
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76 public static double tan(double x) { |
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77 if (abs(x) < PI_4) { |
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78 return MathIntrinsicNode.compute(x, Operation.TAN); |
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79 } else { |
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80 return RuntimeCallNode.callDouble(RuntimeCall.ArithmeticTan, x); |
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81 } |
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82 } |
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83 |
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84 } |