1 /*
2 * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_ASM_REGISTER_HPP
26 #define SHARE_VM_ASM_REGISTER_HPP
27
28 #include "utilities/top.hpp"
29
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 #ifdef TARGET_ARCH_x86
97 # include "register_x86.hpp"
98 #endif
99 #ifdef TARGET_ARCH_sparc
100 # include "register_sparc.hpp"
101 #endif
102 #ifdef TARGET_ARCH_zero
103 # include "register_zero.hpp"
104 #endif
105 #ifdef TARGET_ARCH_arm
106 # include "register_arm.hpp"
107 #endif
108 #ifdef TARGET_ARCH_ppc
109 # include "register_ppc.hpp"
110 #endif
111
112
113 // Debugging support
114
115 inline void assert_different_registers(
116 AbstractRegister a,
117 AbstractRegister b
118 ) {
119 assert(
120 a != b,
121 err_msg_res("registers must be different: a=%d, b=%d",
122 a, b)
123 );
124 }
125
126
127 inline void assert_different_registers(
128 AbstractRegister a,
129 AbstractRegister b,
130 AbstractRegister c
131 ) {
132 assert(
133 a != b && a != c
134 && b != c,
135 err_msg_res("registers must be different: a=%d, b=%d, c=%d",
136 a, b, c)
137 );
138 }
139
140
141 inline void assert_different_registers(
142 AbstractRegister a,
143 AbstractRegister b,
144 AbstractRegister c,
145 AbstractRegister d
146 ) {
147 assert(
148 a != b && a != c && a != d
149 && b != c && b != d
150 && c != d,
151 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d",
152 a, b, c, d)
153 );
154 }
155
156
157 inline void assert_different_registers(
158 AbstractRegister a,
159 AbstractRegister b,
160 AbstractRegister c,
161 AbstractRegister d,
162 AbstractRegister e
163 ) {
164 assert(
165 a != b && a != c && a != d && a != e
166 && b != c && b != d && b != e
167 && c != d && c != e
168 && d != e,
169 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d, e=%d",
170 a, b, c, d, e)
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 ) {
183 assert(
184 a != b && a != c && a != d && a != e && a != f
185 && b != c && b != d && b != e && b != f
186 && c != d && c != e && c != f
187 && d != e && d != f
188 && e != f,
189 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d, e=%d, f=%d",
190 a, b, c, d, e, f)
191 );
192 }
193
194
195 inline void assert_different_registers(
196 AbstractRegister a,
197 AbstractRegister b,
198 AbstractRegister c,
199 AbstractRegister d,
200 AbstractRegister e,
201 AbstractRegister f,
202 AbstractRegister g
203 ) {
204 assert(
205 a != b && a != c && a != d && a != e && a != f && a != g
206 && b != c && b != d && b != e && b != f && b != g
207 && c != d && c != e && c != f && c != g
208 && d != e && d != f && d != g
209 && e != f && e != g
210 && f != g,
211 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d, e=%d, f=%d, g=%d",
212 a, b, c, d, e, f, g)
213 );
214 }
215
216
217 inline void assert_different_registers(
218 AbstractRegister a,
219 AbstractRegister b,
220 AbstractRegister c,
221 AbstractRegister d,
222 AbstractRegister e,
223 AbstractRegister f,
224 AbstractRegister g,
225 AbstractRegister h
226 ) {
227 assert(
228 a != b && a != c && a != d && a != e && a != f && a != g && a != h
229 && b != c && b != d && b != e && b != f && b != g && b != h
230 && c != d && c != e && c != f && c != g && c != h
231 && d != e && d != f && d != g && d != h
232 && e != f && e != g && e != h
233 && f != g && f != h
234 && g != h,
235 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d, e=%d, f=%d, g=%d, h=%d",
236 a, b, c, d, e, f, g, h)
237 );
238 }
239
240
241 inline void assert_different_registers(
242 AbstractRegister a,
243 AbstractRegister b,
244 AbstractRegister c,
245 AbstractRegister d,
246 AbstractRegister e,
247 AbstractRegister f,
248 AbstractRegister g,
249 AbstractRegister h,
250 AbstractRegister i
251 ) {
252 assert(
253 a != b && a != c && a != d && a != e && a != f && a != g && a != h && a != i
254 && b != c && b != d && b != e && b != f && b != g && b != h && b != i
255 && c != d && c != e && c != f && c != g && c != h && c != i
256 && d != e && d != f && d != g && d != h && d != i
257 && e != f && e != g && e != h && e != i
258 && f != g && f != h && f != i
259 && g != h && g != i
260 && h != i,
261 err_msg_res("registers must be different: a=%d, b=%d, c=%d, d=%d, e=%d, f=%d, g=%d, h=%d, i=%d",
262 a, b, c, d, e, f, g, h, i)
263 );
264 }
265
266 #endif // SHARE_VM_ASM_REGISTER_HPP