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annotate src/share/vm/asm/register.hpp @ 4724:0841c0ec2ed6
7123810: new hotspot build - hs23-b10
Reviewed-by: jcoomes
author | amurillo |
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date | Fri, 23 Dec 2011 15:29:34 -0800 |
parents | f95d63e2154a |
children | 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_ASM_REGISTER_HPP |
26 #define SHARE_VM_ASM_REGISTER_HPP | |
27 | |
28 #include "utilities/top.hpp" | |
29 | |
0 | 30 // Use AbstractRegister as shortcut |
31 class AbstractRegisterImpl; | |
32 typedef AbstractRegisterImpl* AbstractRegister; | |
33 | |
34 | |
35 // The super class for platform specific registers. Instead of using value objects, | |
36 // registers are implemented as pointers. Subclassing is used so all registers can | |
37 // use the debugging suport below. No virtual functions are used for efficiency. | |
38 // They are canonicalized; i.e., registers are equal if their pointers are equal, | |
39 // and vice versa. A concrete implementation may just map the register onto 'this'. | |
40 | |
41 class AbstractRegisterImpl { | |
42 protected: | |
43 int value() const { return (int)(intx)this; } | |
44 }; | |
45 | |
46 | |
47 // | |
48 // Macros for use in defining Register instances. We'd like to be | |
49 // able to simply define const instances of the RegisterImpl* for each | |
50 // of the registers needed on a system in a header file. However many | |
51 // compilers don't handle this very well and end up producing a | |
52 // private definition in every file which includes the header file. | |
53 // Along with the static constructors necessary for initialization it | |
54 // can consume a significant amount of space in the result library. | |
55 // | |
56 // The following macros allow us to declare the instance in a .hpp and | |
57 // produce an enumeration value which has the same number. Then in a | |
58 // .cpp the the register instance can be defined using the enumeration | |
59 // value. This avoids the use of static constructors and multiple | |
60 // definitions per .cpp. In addition #defines for the register can be | |
61 // produced so that the constant registers can be inlined. These | |
62 // macros should not be used inside other macros, because you may get | |
63 // multiple evaluations of the macros which can give bad results. | |
64 // | |
65 // Here are some example uses and expansions. Note that the macro | |
66 // invocation is terminated with a ;. | |
67 // | |
68 // CONSTANT_REGISTER_DECLARATION(Register, G0, 0); | |
69 // | |
70 // extern const Register G0 ; | |
71 // enum { G0_RegisterEnumValue = 0 } ; | |
72 // | |
73 // REGISTER_DECLARATION(Register, Gmethod, G5); | |
74 // | |
75 // extern const Register Gmethod ; | |
76 // enum { Gmethod_RegisterEnumValue = G5_RegisterEnumValue } ; | |
77 // | |
78 // REGISTER_DEFINITION(Register, G0); | |
79 // | |
80 // const Register G0 = ( ( Register ) G0_RegisterEnumValue ) ; | |
81 // | |
82 | |
83 #define AS_REGISTER(type,name) ((type)name##_##type##EnumValue) | |
84 | |
85 #define CONSTANT_REGISTER_DECLARATION(type, name, value) \ | |
86 extern const type name; \ | |
87 enum { name##_##type##EnumValue = (value) } | |
88 | |
89 #define REGISTER_DECLARATION(type, name, value) \ | |
90 extern const type name; \ | |
91 enum { name##_##type##EnumValue = value##_##type##EnumValue } | |
92 | |
93 #define REGISTER_DEFINITION(type, name) \ | |
94 const type name = ((type)name##_##type##EnumValue) | |
95 | |
96 | |
97 | |
98 // Debugging support | |
99 | |
100 inline void assert_different_registers( | |
101 AbstractRegister a, | |
102 AbstractRegister b | |
103 ) { | |
104 assert( | |
105 a != b, | |
106 "registers must be different" | |
107 ); | |
108 } | |
109 | |
110 | |
111 inline void assert_different_registers( | |
112 AbstractRegister a, | |
113 AbstractRegister b, | |
114 AbstractRegister c | |
115 ) { | |
116 assert( | |
117 a != b && a != c | |
118 && b != c, | |
119 "registers must be different" | |
120 ); | |
121 } | |
122 | |
123 | |
124 inline void assert_different_registers( | |
125 AbstractRegister a, | |
126 AbstractRegister b, | |
127 AbstractRegister c, | |
128 AbstractRegister d | |
129 ) { | |
130 assert( | |
131 a != b && a != c && a != d | |
132 && b != c && b != d | |
133 && c != d, | |
134 "registers must be different" | |
135 ); | |
136 } | |
137 | |
138 | |
139 inline void assert_different_registers( | |
140 AbstractRegister a, | |
141 AbstractRegister b, | |
142 AbstractRegister c, | |
143 AbstractRegister d, | |
144 AbstractRegister e | |
145 ) { | |
146 assert( | |
147 a != b && a != c && a != d && a != e | |
148 && b != c && b != d && b != e | |
149 && c != d && c != e | |
150 && d != e, | |
151 "registers must be different" | |
152 ); | |
153 } | |
154 | |
155 | |
156 inline void assert_different_registers( | |
157 AbstractRegister a, | |
158 AbstractRegister b, | |
159 AbstractRegister c, | |
160 AbstractRegister d, | |
161 AbstractRegister e, | |
162 AbstractRegister f | |
163 ) { | |
164 assert( | |
165 a != b && a != c && a != d && a != e && a != f | |
166 && b != c && b != d && b != e && b != f | |
167 && c != d && c != e && c != f | |
168 && d != e && d != f | |
169 && e != f, | |
170 "registers must be different" | |
171 ); | |
172 } | |
173 | |
174 | |
175 inline void assert_different_registers( | |
176 AbstractRegister a, | |
177 AbstractRegister b, | |
178 AbstractRegister c, | |
179 AbstractRegister d, | |
180 AbstractRegister e, | |
181 AbstractRegister f, | |
182 AbstractRegister g | |
183 ) { | |
184 assert( | |
185 a != b && a != c && a != d && a != e && a != f && a != g | |
186 && b != c && b != d && b != e && b != f && b != g | |
187 && c != d && c != e && c != f && c != g | |
188 && d != e && d != f && d != g | |
189 && e != f && e != g | |
190 && f != g, | |
191 "registers must be different" | |
192 ); | |
193 } | |
194 | |
195 | |
196 inline void assert_different_registers( | |
197 AbstractRegister a, | |
198 AbstractRegister b, | |
199 AbstractRegister c, | |
200 AbstractRegister d, | |
201 AbstractRegister e, | |
202 AbstractRegister f, | |
203 AbstractRegister g, | |
204 AbstractRegister h | |
205 ) { | |
206 assert( | |
207 a != b && a != c && a != d && a != e && a != f && a != g && a != h | |
208 && b != c && b != d && b != e && b != f && b != g && b != h | |
209 && c != d && c != e && c != f && c != g && c != h | |
210 && d != e && d != f && d != g && d != h | |
211 && e != f && e != g && e != h | |
212 && f != g && f != h | |
213 && g != h, | |
214 "registers must be different" | |
215 ); | |
216 } | |
1972 | 217 |
218 #endif // SHARE_VM_ASM_REGISTER_HPP |