1 /* |
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2 * Copyright (c) 2002, 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 */ |
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24 |
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25 package sun.jvm.hotspot.asm.sparc; |
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26 |
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27 import sun.jvm.hotspot.asm.Register; |
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28 import sun.jvm.hotspot.utilities.Assert; |
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29 |
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30 public class SPARCFloatRegister extends SPARCRegister { |
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31 |
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32 public SPARCFloatRegister(int number) { |
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33 super(number); |
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34 } |
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35 |
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36 public int getNumber() { |
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37 return number; |
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38 } |
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39 |
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40 public static final int SINGLE_PRECISION = 1; |
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41 public static final int DOUBLE_PRECISION = 2; |
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42 public static final int QUAD_PRECISION = 3; |
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43 |
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44 public int getNumber(int width) { |
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45 switch (width) { |
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46 case SINGLE_PRECISION: |
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47 Assert.that(number < 32, "bad single-prec fp register"); |
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48 return number; |
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49 |
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50 case DOUBLE_PRECISION: |
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51 Assert.that(number < 64 && (number & 1) == 0, "bad double-prec fp register"); |
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52 return number & 0x1e | (number & 0x20) >> 5; |
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53 |
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54 case QUAD_PRECISION: |
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55 Assert.that(number < 64 && (number & 3) == 0, "bad quad-prec fp register"); |
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56 return number & 0x1c | (number & 0x20) >> 5; |
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57 } |
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58 throw new RuntimeException("Invalid floating point width supplied"); |
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59 } |
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60 |
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61 private static final int nofRegisters = 63; |
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62 public int getNumberOfRegisters() { |
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63 return nofRegisters; |
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64 } |
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65 |
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66 public boolean isFloat() { |
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67 return true; |
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68 } |
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69 |
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70 public boolean isFramePointer() { |
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71 return false; |
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72 } |
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73 |
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74 public boolean isStackPointer() { |
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75 return false; |
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76 } |
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77 |
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78 public boolean isV9Only() { |
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79 return number > 31; |
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80 } |
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81 |
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82 public boolean isValid() { |
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83 return number >= 0 && number < nofRegisters; |
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84 } |
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85 |
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86 public String toString() { |
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87 return SPARCFloatRegisters.getRegisterName(number); |
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88 } |
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89 |
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90 } |
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