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1010
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1 /*
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2 * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * Copyright 2007 Red Hat, Inc.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
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22 * have any questions.
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23 *
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24 */
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25
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26 class VMRegImpl;
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27 typedef VMRegImpl* VMReg;
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28
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29 // Use Register as shortcut
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30 class RegisterImpl;
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31 typedef RegisterImpl* Register;
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32
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33 inline Register as_Register(int encoding) {
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34 return (Register)(intptr_t) encoding;
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35 }
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36
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37 // The implementation of integer registers for the zero architecture
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38 class RegisterImpl : public AbstractRegisterImpl {
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39 public:
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40 enum {
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41 number_of_registers = 0
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42 };
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43
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44 // construction
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45 inline friend Register as_Register(int encoding);
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46 VMReg as_VMReg();
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47
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48 // derived registers, offsets, and addresses
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49 Register successor() const {
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50 return as_Register(encoding() + 1);
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51 }
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52
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53 // accessors
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54 int encoding() const {
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55 assert(is_valid(), "invalid register");
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56 return (intptr_t)this;
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57 }
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58 bool is_valid() const {
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59 return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;
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60 }
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61 const char* name() const;
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62 };
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63
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64 // Use FloatRegister as shortcut
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65 class FloatRegisterImpl;
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66 typedef FloatRegisterImpl* FloatRegister;
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67
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68 inline FloatRegister as_FloatRegister(int encoding) {
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69 return (FloatRegister)(intptr_t) encoding;
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70 }
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71
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72 // The implementation of floating point registers for the zero architecture
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73 class FloatRegisterImpl : public AbstractRegisterImpl {
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74 public:
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75 enum {
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76 number_of_registers = 0
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77 };
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78
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79 // construction
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80 inline friend FloatRegister as_FloatRegister(int encoding);
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81 VMReg as_VMReg();
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82
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83 // derived registers, offsets, and addresses
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84 FloatRegister successor() const {
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85 return as_FloatRegister(encoding() + 1);
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86 }
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87
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88 // accessors
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89 int encoding() const {
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90 assert(is_valid(), "invalid register");
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91 return (intptr_t)this;
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92 }
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93 bool is_valid() const {
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94 return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;
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95 }
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96 const char* name() const;
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97 };
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98
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99 class ConcreteRegisterImpl : public AbstractRegisterImpl {
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100 public:
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101 enum {
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102 number_of_registers = RegisterImpl::number_of_registers +
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103 FloatRegisterImpl::number_of_registers
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104 };
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105
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106 static const int max_gpr;
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107 static const int max_fpr;
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108 };
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109
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110 CONSTANT_REGISTER_DECLARATION(Register, noreg, (-1));
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