1 /*
2 * Copyright 2002-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 package sun.jvm.hotspot.asm.x86;
26
27 import sun.jvm.hotspot.asm.*;
28
29 public class GRPDecoder extends InstructionDecoder {
30
31 final private int number;
32 //Please refer to IA-32 Intel Architecture Software Developer's Manual Volume 2
33 //APPENDIX A - Table A-4. Opcode Extensions for One and Two-byte Opcodes by Group Number.
34 private static final InstructionDecoder grpTable[][] = {
35 {
36 new ArithmeticDecoder("addb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_ADD),
37 new LogicalDecoder("orb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_OR),
38 new ArithmeticDecoder("adcb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_ADDC),
39 new ArithmeticDecoder("sbbb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_SUBC),
40 new LogicalDecoder("andb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_AND),
41 new ArithmeticDecoder("subb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_SUB),
42 new LogicalDecoder("xorb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_XOR),
43 new InstructionDecoder("cmpb", ADDR_E, b_mode, ADDR_I, b_mode)
44 },
45 {
46 new ArithmeticDecoder("addS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_ADD),
47 new LogicalDecoder("orS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_OR),
48 new ArithmeticDecoder("adcS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_ADDC),
49 new ArithmeticDecoder("sbbS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_SUBC),
50 new LogicalDecoder("andS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_AND),
51 new ArithmeticDecoder("subS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_SUB),
52 new LogicalDecoder("xorS", ADDR_E, v_mode, ADDR_I, v_mode, RTLOP_XOR),
53 new InstructionDecoder("cmpS", ADDR_E, v_mode, ADDR_I, v_mode)
54 },
55 {
56 new ArithmeticDecoder("addS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_ADD), /*note: sIb here*/
57 new LogicalDecoder("orS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_OR),
58 new ArithmeticDecoder("adcS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_ADDC),
59 new ArithmeticDecoder("sbbS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_SUBC),
60 new LogicalDecoder("andS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_AND),
61 new ArithmeticDecoder("subS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_SUB),
62 new LogicalDecoder("xorS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_XOR),
63 new InstructionDecoder("cmpS", ADDR_E, v_mode, ADDR_I, b_mode)
64 },
65 {
66 new RotateDecoder("rolb", ADDR_E, b_mode, ADDR_I, b_mode),
67 new RotateDecoder("rorb", ADDR_E, b_mode, ADDR_I, b_mode),
68 new RotateDecoder("rclb", ADDR_E, b_mode, ADDR_I, b_mode),
69 new RotateDecoder("rcrb", ADDR_E, b_mode, ADDR_I, b_mode),
70 new ShiftDecoder("shlb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_SLL),
71 new ShiftDecoder("shrb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_SRL),
72 null,
73 new ShiftDecoder("sarb", ADDR_E, b_mode, ADDR_I, b_mode, RTLOP_SRA),
74 },
75 {
76 new RotateDecoder("rolS", ADDR_E, v_mode, ADDR_I, b_mode),
77 new RotateDecoder("rorS", ADDR_E, v_mode, ADDR_I, b_mode),
78 new RotateDecoder("rclS", ADDR_E, v_mode, ADDR_I, b_mode),
79 new RotateDecoder("rcrS", ADDR_E, v_mode, ADDR_I, b_mode),
80 new ShiftDecoder("shlS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_SLL),
81 new ShiftDecoder("shrS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_SRL),
82 null,
83 new ShiftDecoder("sarS", ADDR_E, v_mode, ADDR_I, b_mode, RTLOP_SRA)
84 },
85 {
86 new RotateDecoder("rolb", ADDR_E, b_mode),
87 new RotateDecoder("rorb", ADDR_E, b_mode),
88 new RotateDecoder("rclb", ADDR_E, b_mode),
89 new RotateDecoder("rcrb", ADDR_E, b_mode),
90 new ShiftDecoder("shlb", ADDR_E, b_mode, RTLOP_SLL),
91 new ShiftDecoder("shrb", ADDR_E, b_mode, RTLOP_SRL),
92 null,
93 new ShiftDecoder("sarb", ADDR_E, b_mode, RTLOP_SRA)
94 },
95 {
96 new RotateDecoder("rolS", ADDR_E, v_mode),
97 new RotateDecoder("rorS", ADDR_E, v_mode),
98 new RotateDecoder("rclS", ADDR_E, v_mode),
99 new RotateDecoder("rcrS", ADDR_E, v_mode),
100 new ShiftDecoder("shlS", ADDR_E, v_mode, RTLOP_SLL),
101 new ShiftDecoder("shrS", ADDR_E, v_mode, RTLOP_SRL),
102 null,
103 new ShiftDecoder("sarS", ADDR_E, v_mode, RTLOP_SRA)
104 },
105 {
106 new RotateDecoder("rolb", ADDR_E, b_mode, ADDR_REG, CL),
107 new RotateDecoder("rorb", ADDR_E, b_mode, ADDR_REG, CL),
108 new RotateDecoder("rclb", ADDR_E, b_mode, ADDR_REG, CL),
109 new RotateDecoder("rcrb", ADDR_E, b_mode, ADDR_REG, CL),
110 new ShiftDecoder( "shlb", ADDR_E, b_mode, ADDR_REG, CL, RTLOP_SLL),
111 new ShiftDecoder("shrb", ADDR_E, b_mode, ADDR_REG, CL, RTLOP_SRL),
112 null,
113 new ShiftDecoder("sarb", ADDR_E, b_mode, ADDR_REG, CL, RTLOP_SRA)
114 },
115 {
116 new RotateDecoder("rolS", ADDR_E, v_mode, ADDR_REG, CL),
117 new RotateDecoder("rorS", ADDR_E, v_mode, ADDR_REG, CL),
118 new RotateDecoder("rclS", ADDR_E, v_mode, ADDR_REG, CL),
119 new RotateDecoder("rcrS", ADDR_E, v_mode, ADDR_REG, CL),
120 new ShiftDecoder("shlS", ADDR_E, v_mode, ADDR_REG, CL, RTLOP_SLL),
121 new ShiftDecoder("shrS", ADDR_E, v_mode, ADDR_REG, CL, RTLOP_SRL),
122 null,
123 new ShiftDecoder("sarS", ADDR_E, v_mode, ADDR_REG, CL, RTLOP_SRA)
124 },
125 {
126 new InstructionDecoder("testb", ADDR_E, b_mode, ADDR_I, b_mode),
127 null, /*new InstructionDecoder("(bad)", ADDR_E, b_mode)*/
128 new LogicalDecoder("notb", ADDR_E, b_mode, RTLOP_NOT),
129 new InstructionDecoder("negb", ADDR_E, b_mode),
130 new ArithmeticDecoder("mulb", ADDR_REG, AL, ADDR_E, b_mode, RTLOP_UMUL),
131 new ArithmeticDecoder("imulb", ADDR_REG, AL, ADDR_E, b_mode, RTLOP_SMUL),
132 new ArithmeticDecoder("divb", ADDR_REG, AL, ADDR_E, b_mode, RTLOP_UDIV),
133 new ArithmeticDecoder("idivb", ADDR_REG, AL, ADDR_E, b_mode, RTLOP_SDIV)
134 },
135 {
136 new InstructionDecoder("testS", ADDR_E, v_mode, ADDR_I, v_mode),
137 null,
138 new LogicalDecoder("notS", ADDR_E, v_mode, RTLOP_NOT),
139 new InstructionDecoder("negS", ADDR_E, v_mode),
140 new ArithmeticDecoder("mulS", ADDR_REG, EAX, ADDR_E, v_mode, RTLOP_UMUL),
141 new ArithmeticDecoder("imulS", ADDR_REG, EAX, ADDR_E, v_mode, RTLOP_SMUL),
142 new ArithmeticDecoder("divS", ADDR_REG, EAX, ADDR_E, v_mode, RTLOP_SDIV),
143 new ArithmeticDecoder("idivS", ADDR_REG, EAX, ADDR_E, v_mode, RTLOP_SDIV)
144 },
145 {
146 new ArithmeticDecoder("incb", ADDR_E, b_mode, RTLOP_ADD),
147 new ArithmeticDecoder("decb", ADDR_E, b_mode, RTLOP_SUB),
148 null,
149 null,
150 null,
151 null,
152 null,
153 null
154 },
155 {
156 new ArithmeticDecoder("incS", ADDR_E, v_mode, RTLOP_ADD),
157 new ArithmeticDecoder("decS", ADDR_E, v_mode, RTLOP_SUB),
158 new CallDecoder("call", ADDR_E, v_mode),
159 new CallDecoder("lcall", ADDR_E, p_mode),
160 new JmpDecoder("jmp", ADDR_E, v_mode),
161 new JmpDecoder("ljmp", ADDR_E, p_mode),
162 new InstructionDecoder("pushS", ADDR_E, v_mode),
163 null
164 },
165 {
166 new InstructionDecoder("sldt", ADDR_E, w_mode),
167 new InstructionDecoder("str", ADDR_E, w_mode),
168 new InstructionDecoder("lldt", ADDR_E, w_mode),
169 new InstructionDecoder("ltr", ADDR_E, w_mode),
170 new InstructionDecoder("verr", ADDR_E, w_mode),
171 new InstructionDecoder("verw", ADDR_E, w_mode),
172 null,
173 null
174 },
175 {
176 new InstructionDecoder("sgdt", ADDR_E, w_mode),
177 new InstructionDecoder("sidt", ADDR_E, w_mode),
178 new InstructionDecoder("lgdt", ADDR_E, w_mode),
179 new InstructionDecoder("lidt", ADDR_E, w_mode),
180 new InstructionDecoder("smsw", ADDR_E, w_mode),
181 null,
182 new InstructionDecoder("lmsw", ADDR_E, w_mode),
183 new InstructionDecoder("invlpg", ADDR_E, w_mode)
184 },
185 {
186 null,
187 null,
188 null,
189 null,
190 new InstructionDecoder("btS", ADDR_E, v_mode, ADDR_I, b_mode),
191 new InstructionDecoder("btsS", ADDR_E, v_mode, ADDR_I, b_mode),
192 new InstructionDecoder("btrS", ADDR_E, v_mode, ADDR_I, b_mode),
193 new InstructionDecoder("btcS", ADDR_E, v_mode, ADDR_I, b_mode)
194 },
195 /*16*/
196 {
197 null,
198 new SSEInstructionDecoder("cmpxch8b", ADDR_W, q_mode),
199 null,
200 null,
201 null,
202 null,
203 null,
204 null
205 },
206 /*17*/
207 {
208 null,
209 null,
210 new SSEShiftDecoder("psrlw", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SRL),
211 null,
212 new SSEShiftDecoder("psraw", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SRA),
213 null,
214 new SSEShiftDecoder("psllw", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SLL),
215 null
216 },
217 /*18*/
218 {
219 null,
220 null,
221 new SSEShiftDecoder("psrld", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SRL),
222 null,
223 new SSEShiftDecoder("psrad", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SRA),
224 null,
225 new SSEShiftDecoder("pslld", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SLL),
226 null
227 },
228 /*19*/
229 {
230 null,
231 null,
232 new SSEShiftDecoder("psrlq", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SRL),
233 null,
234 null,
235 null,
236 new SSEShiftDecoder("psllq", ADDR_P, q_mode, ADDR_I, b_mode, RTLOP_SLL),
237 null
238 },
239 /*20 - Grp15*/
240 {
241 new SSEInstructionDecoder("fxsave"),
242 new SSEInstructionDecoder("fxrstor"),
243 new SSEInstructionDecoder("ldmxcsr"),
244 new SSEInstructionDecoder("stmxcsr"),
245 null,
246 null,
247 null,
248 new SSEInstructionDecoder("clflush")
249 },
250 /*21 - Grp16*/
251 {
252 new SSEInstructionDecoder("prefetchnta"),
253 new SSEInstructionDecoder("prefetcht0"),
254 new SSEInstructionDecoder("prefetcht1"),
255 new SSEInstructionDecoder("prefetcht2"),
256 null,
257 null,
258 null,
259 null
260 },
261 /*22 - Grp12:66*/
262 {
263 null,
264 null,
265 new SSEShiftDecoder("psrlw", ADDR_P, dq_mode, ADDR_I, b_mode, RTLOP_SRL),
266 null,
267 new SSEShiftDecoder("psraw", ADDR_P, dq_mode, ADDR_I, b_mode, RTLOP_SRA),
268 null,
269 new SSEShiftDecoder("psllw", ADDR_P, dq_mode, ADDR_I, b_mode, RTLOP_SLL),
270 null
271 },
272 /*23 - Grp13:66*/
273 {
274 null,
275 null,
276 new SSEShiftDecoder("psrld", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SRL),
277 null,
278 new SSEShiftDecoder("psrad", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SRA),
279 null,
280 new SSEShiftDecoder("pslld", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SLL),
281 null
282 },
283 /*24 - - Grp14:66*/
284 {
285 null,
286 null,
287 new SSEShiftDecoder("psrlq", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SRL),
288 new SSEShiftDecoder("psrldq", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SRL),
289 null,
290 null,
291 new SSEShiftDecoder("psllq", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SLL),
292 new SSEShiftDecoder("psllq", ADDR_W, dq_mode, ADDR_I, b_mode, RTLOP_SLL)
293 }
294 };
295
296 public GRPDecoder(String name, int number) {
297 super(name);
298 this.number = number;
299 }
300
301 public Instruction decode(byte[] bytesArray, int index, int instrStartIndex, int segmentOverride, int prefixes, X86InstructionFactory factory) {
302 this.byteIndex = index;
303 this.instrStartIndex = instrStartIndex;
304 this.prefixes = prefixes;
305
306 int ModRM = readByte(bytesArray, byteIndex);
307 int reg = (ModRM >> 3) & 7;
308
309 InstructionDecoder instrDecoder = grpTable[number][reg];
310 Instruction instr = null;
311 if(instrDecoder != null) {
312 instr = instrDecoder.decode(bytesArray, byteIndex, instrStartIndex, segmentOverride, prefixes, factory);
313 byteIndex = instrDecoder.getCurrentIndex();
314 } else {
315 instr = factory.newIllegalInstruction();
316 }
317
318 return instr;
319 }
320 }