register_zero.hpp revision 1010:354d3184f6b2 
1/*
2 * Copyright 2000-2007 Sun Microsystems, Inc.  All Rights Reserved.
3 * Copyright 2007 Red Hat, Inc.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 */
25
26class VMRegImpl;
27typedef VMRegImpl* VMReg;
28
29// Use Register as shortcut
30class RegisterImpl;
31typedef RegisterImpl* Register;
32
33inline Register as_Register(int encoding) {
34  return (Register)(intptr_t) encoding;
35}
36
37// The implementation of integer registers for the zero architecture
38class RegisterImpl : public AbstractRegisterImpl {
39 public:
40  enum {
41    number_of_registers = 0
42  };
43
44  // construction
45  inline friend Register as_Register(int encoding);
46  VMReg as_VMReg();
47
48  // derived registers, offsets, and addresses
49  Register successor() const {
50    return as_Register(encoding() + 1);
51  }
52
53  // accessors
54  int encoding() const {
55    assert(is_valid(), "invalid register");
56    return (intptr_t)this;
57  }
58  bool is_valid() const {
59    return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;
60  }
61  const char* name() const;
62};
63
64// Use FloatRegister as shortcut
65class FloatRegisterImpl;
66typedef FloatRegisterImpl* FloatRegister;
67
68inline FloatRegister as_FloatRegister(int encoding) {
69  return (FloatRegister)(intptr_t) encoding;
70}
71
72// The implementation of floating point registers for the zero architecture
73class FloatRegisterImpl : public AbstractRegisterImpl {
74 public:
75  enum {
76    number_of_registers = 0
77  };
78
79  // construction
80  inline friend FloatRegister as_FloatRegister(int encoding);
81  VMReg as_VMReg();
82
83  // derived registers, offsets, and addresses
84  FloatRegister successor() const {
85    return as_FloatRegister(encoding() + 1);
86  }
87
88  // accessors
89  int encoding() const {
90    assert(is_valid(), "invalid register");
91    return (intptr_t)this;
92  }
93  bool is_valid() const {
94    return 0 <= (intptr_t) this && (intptr_t)this < number_of_registers;
95  }
96  const char* name() const;
97};
98
99class ConcreteRegisterImpl : public AbstractRegisterImpl {
100 public:
101  enum {
102    number_of_registers = RegisterImpl::number_of_registers +
103                          FloatRegisterImpl::number_of_registers
104  };
105
106  static const int max_gpr;
107  static const int max_fpr;
108};
109
110CONSTANT_REGISTER_DECLARATION(Register, noreg, (-1));
111