1 /*
2 * Copyright (c) 1997, 2022, 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 #include "precompiled.hpp"
26 #include "interpreter/bytecodes.hpp"
27 #include "memory/resourceArea.hpp"
28 #include "oops/method.hpp"
29 #include "utilities/align.hpp"
30 #include "utilities/bytes.hpp"
31
32 bool Bytecodes::_is_initialized = false;
33 const char* Bytecodes::_name [Bytecodes::number_of_codes];
34 BasicType Bytecodes::_result_type [Bytecodes::number_of_codes];
35 s_char Bytecodes::_depth [Bytecodes::number_of_codes];
36 u_char Bytecodes::_lengths [Bytecodes::number_of_codes];
37 Bytecodes::Code Bytecodes::_java_code [Bytecodes::number_of_codes];
38 unsigned short Bytecodes::_flags [(1<<BitsPerByte)*2];
39
40 #ifdef ASSERT
41 bool Bytecodes::check_method(const Method* method, address bcp) {
42 return method->contains(bcp);
43 }
44 #endif
45
46 bool Bytecodes::check_must_rewrite(Bytecodes::Code code) {
47 assert(can_rewrite(code), "post-check only");
48
49 // Some codes are conditionally rewriting. Look closely at them.
50 switch (code) {
51 case Bytecodes::_aload_0:
52 // Even if RewriteFrequentPairs is turned on,
53 // the _aload_0 code might delay its rewrite until
54 // a following _getfield rewrites itself.
55 return false;
56
57 case Bytecodes::_lookupswitch:
58 return false; // the rewrite is not done by the interpreter
59
60 case Bytecodes::_new:
61 // (Could actually look at the class here, but the profit would be small.)
62 return false; // the rewrite is not always done
63
64 default:
65 // No other special cases.
66 return true;
67 }
68 }
69
70 Bytecodes::Code Bytecodes::code_at(Method* method, int bci) {
71 return code_at(method, method->bcp_from(bci));
72 }
73
74 Bytecodes::Code Bytecodes::non_breakpoint_code_at(const Method* method, address bcp) {
75 assert(method != NULL, "must have the method for breakpoint conversion");
76 assert(method->contains(bcp), "must be valid bcp in method");
77 return method->orig_bytecode_at(method->bci_from(bcp));
78 }
79
80 int Bytecodes::special_length_at(Bytecodes::Code code, address bcp, address end) {
81 switch (code) {
82 case _wide:
83 if (end != NULL && bcp + 1 >= end) {
84 return -1; // don't read past end of code buffer
85 }
86 return wide_length_for(cast(*(bcp + 1)));
87 case _tableswitch:
88 { address aligned_bcp = align_up(bcp + 1, jintSize);
89 if (end != NULL && aligned_bcp + 3*jintSize >= end) {
90 return -1; // don't read past end of code buffer
91 }
92 jlong lo = (jint)Bytes::get_Java_u4(aligned_bcp + 1*jintSize);
93 jlong hi = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize);
94 jlong len = (aligned_bcp - bcp) + (3 + hi - lo + 1)*jintSize;
95 // only return len if it can be represented as a positive int;
96 // return -1 otherwise
97 return (len > 0 && len == (int)len) ? len : -1;
98 }
99
100 case _lookupswitch: // fall through
101 case _fast_binaryswitch: // fall through
102 case _fast_linearswitch:
103 { address aligned_bcp = align_up(bcp + 1, jintSize);
104 if (end != NULL && aligned_bcp + 2*jintSize >= end) {
105 return -1; // don't read past end of code buffer
106 }
107 jlong npairs = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize);
108 jlong len = (aligned_bcp - bcp) + (2 + 2*npairs)*jintSize;
109 // only return len if it can be represented as a positive int;
110 // return -1 otherwise
111 return (len > 0 && len == (int)len) ? len : -1;
112 }
113 default:
114 // Note: Length functions must return <=0 for invalid bytecodes.
115 return 0;
116 }
117 }
118
119 // At a breakpoint instruction, this returns the breakpoint's length,
120 // otherwise, it's the same as special_length_at(). This is used by
121 // the RawByteCodeStream, which wants to see the actual bytecode
122 // values (including breakpoint). RawByteCodeStream is used by the
123 // verifier when reading in bytecode to verify. Other mechanisms that
124 // run at runtime (such as generateOopMaps) need to iterate over the code
125 // and don't expect to see breakpoints: they want to see the instruction
126 // which was replaced so that they can get the correct length and find
127 // the next bytecode.
128 //
129 // 'end' indicates the end of the code buffer, which we should not try to read
130 // past.
131 int Bytecodes::raw_special_length_at(address bcp, address end) {
132 Code code = code_or_bp_at(bcp);
133 if (code == _breakpoint) {
134 return 1;
135 } else {
136 return special_length_at(code, bcp, end);
137 }
138 }
139
140
141
142 void Bytecodes::def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap) {
143 def(code, name, format, wide_format, result_type, depth, can_trap, code);
144 }
145
146
147 void Bytecodes::def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap, Code java_code) {
148 assert(wide_format == NULL || format != NULL, "short form must exist if there's a wide form");
149 int len = (format != NULL ? (int) strlen(format) : 0);
150 int wlen = (wide_format != NULL ? (int) strlen(wide_format) : 0);
151 _name [code] = name;
152 _result_type [code] = result_type;
153 _depth [code] = depth;
154 _lengths [code] = (wlen << 4) | (len & 0xF);
155 _java_code [code] = java_code;
156 int bc_flags = 0;
157 if (can_trap) bc_flags |= _bc_can_trap;
158 if (java_code != code) bc_flags |= _bc_can_rewrite;
159 _flags[(u1)code+0*(1<<BitsPerByte)] = compute_flags(format, bc_flags);
160 _flags[(u1)code+1*(1<<BitsPerByte)] = compute_flags(wide_format, bc_flags);
161 assert(is_defined(code) == (format != NULL), "");
162 assert(wide_is_defined(code) == (wide_format != NULL), "");
163 assert(length_for(code) == len, "");
164 assert(wide_length_for(code) == wlen, "");
165 }
166
167
168 // Format strings interpretation:
169 //
170 // b: bytecode
171 // c: signed constant, Java byte-ordering
172 // i: unsigned local index, Java byte-ordering (I = native byte ordering)
173 // j: unsigned CP cache index, Java byte-ordering (J = native byte ordering)
174 // k: unsigned CP index, Java byte-ordering
175 // o: branch offset, Java byte-ordering
176 // _: unused/ignored
177 // w: wide bytecode
178 //
179 // Note: The format strings are used for 2 purposes:
180 // 1. to specify the length of the bytecode
181 // (= number of characters in format string)
182 // 2. to derive bytecode format flags (_fmt_has_k, etc.)
183 //
184 // Note: For bytecodes with variable length, the format string is the empty string.
185
186 int Bytecodes::compute_flags(const char* format, int more_flags) {
187 if (format == NULL) return 0; // not even more_flags
188 int flags = more_flags;
189 const char* fp = format;
190 switch (*fp) {
191 case '\0':
192 flags |= _fmt_not_simple; // but variable
193 break;
194 case 'b':
195 flags |= _fmt_not_variable; // but simple
196 ++fp; // skip 'b'
197 break;
198 case 'w':
199 flags |= _fmt_not_variable | _fmt_not_simple;
200 ++fp; // skip 'w'
201 guarantee(*fp == 'b', "wide format must start with 'wb'");
202 ++fp; // skip 'b'
203 break;
204 }
205
206 int has_nbo = 0, has_jbo = 0, has_size = 0;
207 for (;;) {
208 int this_flag = 0;
209 char fc = *fp++;
210 switch (fc) {
211 case '\0': // end of string
212 assert(flags == (jchar)flags, "change _format_flags");
213 return flags;
214
215 case '_': continue; // ignore these
216
217 case 'j': this_flag = _fmt_has_j; has_jbo = 1; break;
218 case 'k': this_flag = _fmt_has_k; has_jbo = 1; break;
219 case 'i': this_flag = _fmt_has_i; has_jbo = 1; break;
220 case 'c': this_flag = _fmt_has_c; has_jbo = 1; break;
221 case 'o': this_flag = _fmt_has_o; has_jbo = 1; break;
222
223 // uppercase versions mark native byte order (from Rewriter)
224 // actually, only the 'J' case happens currently
225 case 'J': this_flag = _fmt_has_j; has_nbo = 1; break;
226 case 'K': this_flag = _fmt_has_k; has_nbo = 1; break;
227 case 'I': this_flag = _fmt_has_i; has_nbo = 1; break;
228 case 'C': this_flag = _fmt_has_c; has_nbo = 1; break;
229 case 'O': this_flag = _fmt_has_o; has_nbo = 1; break;
230 default: guarantee(false, "bad char in format");
231 }
232
233 flags |= this_flag;
234
235 guarantee(!(has_jbo && has_nbo), "mixed byte orders in format");
236 if (has_nbo)
237 flags |= _fmt_has_nbo;
238
239 int this_size = 1;
240 if (*fp == fc) {
241 // advance beyond run of the same characters
242 this_size = 2;
243 while (*++fp == fc) this_size++;
244 switch (this_size) {
245 case 2: flags |= _fmt_has_u2; break;
246 case 4: flags |= _fmt_has_u4; break;
247 default: guarantee(false, "bad rep count in format");
248 }
249 }
250 guarantee(has_size == 0 || // no field yet
251 this_size == has_size || // same size
252 this_size < has_size && *fp == '\0', // last field can be short
253 "mixed field sizes in format");
254 has_size = this_size;
255 }
256 }
257
258 void Bytecodes::initialize() {
259 if (_is_initialized) return;
260 assert(number_of_codes <= 256, "too many bytecodes");
261
262 // initialize bytecode tables - didn't use static array initializers
263 // (such as {}) so we can do additional consistency checks and init-
264 // code is independent of actual bytecode numbering.
265 //
266 // Note 1: NULL for the format string means the bytecode doesn't exist
267 // in that form.
268 //
269 // Note 2: The result type is T_ILLEGAL for bytecodes where the top of stack
270 // type after execution is not only determined by the bytecode itself.
271
272 // Java bytecodes
273 // bytecode bytecode name format wide f. result tp stk traps
274 def(_nop , "nop" , "b" , NULL , T_VOID , 0, false);
275 def(_aconst_null , "aconst_null" , "b" , NULL , T_OBJECT , 1, false);
276 def(_iconst_m1 , "iconst_m1" , "b" , NULL , T_INT , 1, false);
277 def(_iconst_0 , "iconst_0" , "b" , NULL , T_INT , 1, false);
278 def(_iconst_1 , "iconst_1" , "b" , NULL , T_INT , 1, false);
279 def(_iconst_2 , "iconst_2" , "b" , NULL , T_INT , 1, false);
280 def(_iconst_3 , "iconst_3" , "b" , NULL , T_INT , 1, false);
281 def(_iconst_4 , "iconst_4" , "b" , NULL , T_INT , 1, false);
282 def(_iconst_5 , "iconst_5" , "b" , NULL , T_INT , 1, false);
283 def(_lconst_0 , "lconst_0" , "b" , NULL , T_LONG , 2, false);
284 def(_lconst_1 , "lconst_1" , "b" , NULL , T_LONG , 2, false);
285 def(_fconst_0 , "fconst_0" , "b" , NULL , T_FLOAT , 1, false);
286 def(_fconst_1 , "fconst_1" , "b" , NULL , T_FLOAT , 1, false);
287 def(_fconst_2 , "fconst_2" , "b" , NULL , T_FLOAT , 1, false);
288 def(_dconst_0 , "dconst_0" , "b" , NULL , T_DOUBLE , 2, false);
289 def(_dconst_1 , "dconst_1" , "b" , NULL , T_DOUBLE , 2, false);
290 def(_bipush , "bipush" , "bc" , NULL , T_INT , 1, false);
291 def(_sipush , "sipush" , "bcc" , NULL , T_INT , 1, false);
292 def(_ldc , "ldc" , "bk" , NULL , T_ILLEGAL, 1, true );
293 def(_ldc_w , "ldc_w" , "bkk" , NULL , T_ILLEGAL, 1, true );
294 def(_ldc2_w , "ldc2_w" , "bkk" , NULL , T_ILLEGAL, 2, true );
295 def(_iload , "iload" , "bi" , "wbii" , T_INT , 1, false);
296 def(_lload , "lload" , "bi" , "wbii" , T_LONG , 2, false);
297 def(_fload , "fload" , "bi" , "wbii" , T_FLOAT , 1, false);
298 def(_dload , "dload" , "bi" , "wbii" , T_DOUBLE , 2, false);
299 def(_aload , "aload" , "bi" , "wbii" , T_OBJECT , 1, false);
300 def(_iload_0 , "iload_0" , "b" , NULL , T_INT , 1, false);
301 def(_iload_1 , "iload_1" , "b" , NULL , T_INT , 1, false);
302 def(_iload_2 , "iload_2" , "b" , NULL , T_INT , 1, false);
303 def(_iload_3 , "iload_3" , "b" , NULL , T_INT , 1, false);
304 def(_lload_0 , "lload_0" , "b" , NULL , T_LONG , 2, false);
305 def(_lload_1 , "lload_1" , "b" , NULL , T_LONG , 2, false);
306 def(_lload_2 , "lload_2" , "b" , NULL , T_LONG , 2, false);
307 def(_lload_3 , "lload_3" , "b" , NULL , T_LONG , 2, false);
308 def(_fload_0 , "fload_0" , "b" , NULL , T_FLOAT , 1, false);
309 def(_fload_1 , "fload_1" , "b" , NULL , T_FLOAT , 1, false);
310 def(_fload_2 , "fload_2" , "b" , NULL , T_FLOAT , 1, false);
311 def(_fload_3 , "fload_3" , "b" , NULL , T_FLOAT , 1, false);
312 def(_dload_0 , "dload_0" , "b" , NULL , T_DOUBLE , 2, false);
313 def(_dload_1 , "dload_1" , "b" , NULL , T_DOUBLE , 2, false);
314 def(_dload_2 , "dload_2" , "b" , NULL , T_DOUBLE , 2, false);
315 def(_dload_3 , "dload_3" , "b" , NULL , T_DOUBLE , 2, false);
316 def(_aload_0 , "aload_0" , "b" , NULL , T_OBJECT , 1, true ); // rewriting in interpreter
317 def(_aload_1 , "aload_1" , "b" , NULL , T_OBJECT , 1, false);
318 def(_aload_2 , "aload_2" , "b" , NULL , T_OBJECT , 1, false);
319 def(_aload_3 , "aload_3" , "b" , NULL , T_OBJECT , 1, false);
320 def(_iaload , "iaload" , "b" , NULL , T_INT , -1, true );
321 def(_laload , "laload" , "b" , NULL , T_LONG , 0, true );
322 def(_faload , "faload" , "b" , NULL , T_FLOAT , -1, true );
323 def(_daload , "daload" , "b" , NULL , T_DOUBLE , 0, true );
324 def(_aaload , "aaload" , "b" , NULL , T_OBJECT , -1, true );
325 def(_baload , "baload" , "b" , NULL , T_INT , -1, true );
326 def(_caload , "caload" , "b" , NULL , T_INT , -1, true );
327 def(_saload , "saload" , "b" , NULL , T_INT , -1, true );
328 def(_istore , "istore" , "bi" , "wbii" , T_VOID , -1, false);
329 def(_lstore , "lstore" , "bi" , "wbii" , T_VOID , -2, false);
330 def(_fstore , "fstore" , "bi" , "wbii" , T_VOID , -1, false);
331 def(_dstore , "dstore" , "bi" , "wbii" , T_VOID , -2, false);
332 def(_astore , "astore" , "bi" , "wbii" , T_VOID , -1, false);
333 def(_istore_0 , "istore_0" , "b" , NULL , T_VOID , -1, false);
334 def(_istore_1 , "istore_1" , "b" , NULL , T_VOID , -1, false);
335 def(_istore_2 , "istore_2" , "b" , NULL , T_VOID , -1, false);
336 def(_istore_3 , "istore_3" , "b" , NULL , T_VOID , -1, false);
337 def(_lstore_0 , "lstore_0" , "b" , NULL , T_VOID , -2, false);
338 def(_lstore_1 , "lstore_1" , "b" , NULL , T_VOID , -2, false);
339 def(_lstore_2 , "lstore_2" , "b" , NULL , T_VOID , -2, false);
340 def(_lstore_3 , "lstore_3" , "b" , NULL , T_VOID , -2, false);
341 def(_fstore_0 , "fstore_0" , "b" , NULL , T_VOID , -1, false);
342 def(_fstore_1 , "fstore_1" , "b" , NULL , T_VOID , -1, false);
343 def(_fstore_2 , "fstore_2" , "b" , NULL , T_VOID , -1, false);
344 def(_fstore_3 , "fstore_3" , "b" , NULL , T_VOID , -1, false);
345 def(_dstore_0 , "dstore_0" , "b" , NULL , T_VOID , -2, false);
346 def(_dstore_1 , "dstore_1" , "b" , NULL , T_VOID , -2, false);
347 def(_dstore_2 , "dstore_2" , "b" , NULL , T_VOID , -2, false);
348 def(_dstore_3 , "dstore_3" , "b" , NULL , T_VOID , -2, false);
349 def(_astore_0 , "astore_0" , "b" , NULL , T_VOID , -1, false);
350 def(_astore_1 , "astore_1" , "b" , NULL , T_VOID , -1, false);
351 def(_astore_2 , "astore_2" , "b" , NULL , T_VOID , -1, false);
352 def(_astore_3 , "astore_3" , "b" , NULL , T_VOID , -1, false);
353 def(_iastore , "iastore" , "b" , NULL , T_VOID , -3, true );
354 def(_lastore , "lastore" , "b" , NULL , T_VOID , -4, true );
355 def(_fastore , "fastore" , "b" , NULL , T_VOID , -3, true );
356 def(_dastore , "dastore" , "b" , NULL , T_VOID , -4, true );
357 def(_aastore , "aastore" , "b" , NULL , T_VOID , -3, true );
358 def(_bastore , "bastore" , "b" , NULL , T_VOID , -3, true );
359 def(_castore , "castore" , "b" , NULL , T_VOID , -3, true );
360 def(_sastore , "sastore" , "b" , NULL , T_VOID , -3, true );
361 def(_pop , "pop" , "b" , NULL , T_VOID , -1, false);
362 def(_pop2 , "pop2" , "b" , NULL , T_VOID , -2, false);
363 def(_dup , "dup" , "b" , NULL , T_VOID , 1, false);
364 def(_dup_x1 , "dup_x1" , "b" , NULL , T_VOID , 1, false);
365 def(_dup_x2 , "dup_x2" , "b" , NULL , T_VOID , 1, false);
366 def(_dup2 , "dup2" , "b" , NULL , T_VOID , 2, false);
367 def(_dup2_x1 , "dup2_x1" , "b" , NULL , T_VOID , 2, false);
368 def(_dup2_x2 , "dup2_x2" , "b" , NULL , T_VOID , 2, false);
369 def(_swap , "swap" , "b" , NULL , T_VOID , 0, false);
370 def(_iadd , "iadd" , "b" , NULL , T_INT , -1, false);
371 def(_ladd , "ladd" , "b" , NULL , T_LONG , -2, false);
372 def(_fadd , "fadd" , "b" , NULL , T_FLOAT , -1, false);
373 def(_dadd , "dadd" , "b" , NULL , T_DOUBLE , -2, false);
374 def(_isub , "isub" , "b" , NULL , T_INT , -1, false);
375 def(_lsub , "lsub" , "b" , NULL , T_LONG , -2, false);
376 def(_fsub , "fsub" , "b" , NULL , T_FLOAT , -1, false);
377 def(_dsub , "dsub" , "b" , NULL , T_DOUBLE , -2, false);
378 def(_imul , "imul" , "b" , NULL , T_INT , -1, false);
379 def(_lmul , "lmul" , "b" , NULL , T_LONG , -2, false);
380 def(_fmul , "fmul" , "b" , NULL , T_FLOAT , -1, false);
381 def(_dmul , "dmul" , "b" , NULL , T_DOUBLE , -2, false);
382 def(_idiv , "idiv" , "b" , NULL , T_INT , -1, true );
383 def(_ldiv , "ldiv" , "b" , NULL , T_LONG , -2, true );
384 def(_fdiv , "fdiv" , "b" , NULL , T_FLOAT , -1, false);
385 def(_ddiv , "ddiv" , "b" , NULL , T_DOUBLE , -2, false);
386 def(_irem , "irem" , "b" , NULL , T_INT , -1, true );
387 def(_lrem , "lrem" , "b" , NULL , T_LONG , -2, true );
388 def(_frem , "frem" , "b" , NULL , T_FLOAT , -1, false);
389 def(_drem , "drem" , "b" , NULL , T_DOUBLE , -2, false);
390 def(_ineg , "ineg" , "b" , NULL , T_INT , 0, false);
391 def(_lneg , "lneg" , "b" , NULL , T_LONG , 0, false);
392 def(_fneg , "fneg" , "b" , NULL , T_FLOAT , 0, false);
393 def(_dneg , "dneg" , "b" , NULL , T_DOUBLE , 0, false);
394 def(_ishl , "ishl" , "b" , NULL , T_INT , -1, false);
395 def(_lshl , "lshl" , "b" , NULL , T_LONG , -1, false);
396 def(_ishr , "ishr" , "b" , NULL , T_INT , -1, false);
397 def(_lshr , "lshr" , "b" , NULL , T_LONG , -1, false);
398 def(_iushr , "iushr" , "b" , NULL , T_INT , -1, false);
399 def(_lushr , "lushr" , "b" , NULL , T_LONG , -1, false);
400 def(_iand , "iand" , "b" , NULL , T_INT , -1, false);
401 def(_land , "land" , "b" , NULL , T_LONG , -2, false);
402 def(_ior , "ior" , "b" , NULL , T_INT , -1, false);
403 def(_lor , "lor" , "b" , NULL , T_LONG , -2, false);
404 def(_ixor , "ixor" , "b" , NULL , T_INT , -1, false);
405 def(_lxor , "lxor" , "b" , NULL , T_LONG , -2, false);
406 def(_iinc , "iinc" , "bic" , "wbiicc", T_VOID , 0, false);
407 def(_i2l , "i2l" , "b" , NULL , T_LONG , 1, false);
408 def(_i2f , "i2f" , "b" , NULL , T_FLOAT , 0, false);
409 def(_i2d , "i2d" , "b" , NULL , T_DOUBLE , 1, false);
410 def(_l2i , "l2i" , "b" , NULL , T_INT , -1, false);
411 def(_l2f , "l2f" , "b" , NULL , T_FLOAT , -1, false);
412 def(_l2d , "l2d" , "b" , NULL , T_DOUBLE , 0, false);
413 def(_f2i , "f2i" , "b" , NULL , T_INT , 0, false);
414 def(_f2l , "f2l" , "b" , NULL , T_LONG , 1, false);
415 def(_f2d , "f2d" , "b" , NULL , T_DOUBLE , 1, false);
416 def(_d2i , "d2i" , "b" , NULL , T_INT , -1, false);
417 def(_d2l , "d2l" , "b" , NULL , T_LONG , 0, false);
418 def(_d2f , "d2f" , "b" , NULL , T_FLOAT , -1, false);
419 def(_i2b , "i2b" , "b" , NULL , T_BYTE , 0, false);
420 def(_i2c , "i2c" , "b" , NULL , T_CHAR , 0, false);
421 def(_i2s , "i2s" , "b" , NULL , T_SHORT , 0, false);
422 def(_lcmp , "lcmp" , "b" , NULL , T_VOID , -3, false);
423 def(_fcmpl , "fcmpl" , "b" , NULL , T_VOID , -1, false);
424 def(_fcmpg , "fcmpg" , "b" , NULL , T_VOID , -1, false);
425 def(_dcmpl , "dcmpl" , "b" , NULL , T_VOID , -3, false);
426 def(_dcmpg , "dcmpg" , "b" , NULL , T_VOID , -3, false);
427 def(_ifeq , "ifeq" , "boo" , NULL , T_VOID , -1, false);
428 def(_ifne , "ifne" , "boo" , NULL , T_VOID , -1, false);
429 def(_iflt , "iflt" , "boo" , NULL , T_VOID , -1, false);
430 def(_ifge , "ifge" , "boo" , NULL , T_VOID , -1, false);
431 def(_ifgt , "ifgt" , "boo" , NULL , T_VOID , -1, false);
432 def(_ifle , "ifle" , "boo" , NULL , T_VOID , -1, false);
433 def(_if_icmpeq , "if_icmpeq" , "boo" , NULL , T_VOID , -2, false);
434 def(_if_icmpne , "if_icmpne" , "boo" , NULL , T_VOID , -2, false);
435 def(_if_icmplt , "if_icmplt" , "boo" , NULL , T_VOID , -2, false);
436 def(_if_icmpge , "if_icmpge" , "boo" , NULL , T_VOID , -2, false);
437 def(_if_icmpgt , "if_icmpgt" , "boo" , NULL , T_VOID , -2, false);
438 def(_if_icmple , "if_icmple" , "boo" , NULL , T_VOID , -2, false);
439 def(_if_acmpeq , "if_acmpeq" , "boo" , NULL , T_VOID , -2, false);
440 def(_if_acmpne , "if_acmpne" , "boo" , NULL , T_VOID , -2, false);
441 def(_goto , "goto" , "boo" , NULL , T_VOID , 0, false);
442 def(_jsr , "jsr" , "boo" , NULL , T_INT , 0, false);
443 def(_ret , "ret" , "bi" , "wbii" , T_VOID , 0, false);
444 def(_tableswitch , "tableswitch" , "" , NULL , T_VOID , -1, false); // may have backward branches
445 def(_lookupswitch , "lookupswitch" , "" , NULL , T_VOID , -1, false); // rewriting in interpreter
446 def(_ireturn , "ireturn" , "b" , NULL , T_INT , -1, true);
447 def(_lreturn , "lreturn" , "b" , NULL , T_LONG , -2, true);
448 def(_freturn , "freturn" , "b" , NULL , T_FLOAT , -1, true);
449 def(_dreturn , "dreturn" , "b" , NULL , T_DOUBLE , -2, true);
450 def(_areturn , "areturn" , "b" , NULL , T_OBJECT , -1, true);
451 def(_return , "return" , "b" , NULL , T_VOID , 0, true);
452 def(_getstatic , "getstatic" , "bJJ" , NULL , T_ILLEGAL, 1, true );
453 def(_putstatic , "putstatic" , "bJJ" , NULL , T_ILLEGAL, -1, true );
454 def(_getfield , "getfield" , "bJJ" , NULL , T_ILLEGAL, 0, true );
455 def(_putfield , "putfield" , "bJJ" , NULL , T_ILLEGAL, -2, true );
456 def(_invokevirtual , "invokevirtual" , "bJJ" , NULL , T_ILLEGAL, -1, true);
457 def(_invokespecial , "invokespecial" , "bJJ" , NULL , T_ILLEGAL, -1, true);
458 def(_invokestatic , "invokestatic" , "bJJ" , NULL , T_ILLEGAL, 0, true);
459 def(_invokeinterface , "invokeinterface" , "bJJ__", NULL , T_ILLEGAL, -1, true);
460 def(_invokedynamic , "invokedynamic" , "bJJJJ", NULL , T_ILLEGAL, 0, true );
461 def(_new , "new" , "bkk" , NULL , T_OBJECT , 1, true );
462 def(_newarray , "newarray" , "bc" , NULL , T_OBJECT , 0, true );
463 def(_anewarray , "anewarray" , "bkk" , NULL , T_OBJECT , 0, true );
464 def(_arraylength , "arraylength" , "b" , NULL , T_INT , 0, true );
465 def(_athrow , "athrow" , "b" , NULL , T_VOID , -1, true );
466 def(_checkcast , "checkcast" , "bkk" , NULL , T_OBJECT , 0, true );
467 def(_instanceof , "instanceof" , "bkk" , NULL , T_INT , 0, true );
468 def(_monitorenter , "monitorenter" , "b" , NULL , T_VOID , -1, true );
469 def(_monitorexit , "monitorexit" , "b" , NULL , T_VOID , -1, true );
470 def(_wide , "wide" , "" , NULL , T_VOID , 0, false);
471 def(_multianewarray , "multianewarray" , "bkkc" , NULL , T_OBJECT , 1, true );
472 def(_ifnull , "ifnull" , "boo" , NULL , T_VOID , -1, false);
473 def(_ifnonnull , "ifnonnull" , "boo" , NULL , T_VOID , -1, false);
474 def(_goto_w , "goto_w" , "boooo", NULL , T_VOID , 0, false);
475 def(_jsr_w , "jsr_w" , "boooo", NULL , T_INT , 0, false);
476 def(_breakpoint , "breakpoint" , "" , NULL , T_VOID , 0, true);
477
478 // JVM bytecodes
479 // bytecode bytecode name format wide f. result tp stk traps std code
480
481 def(_fast_agetfield , "fast_agetfield" , "bJJ" , NULL , T_OBJECT , 0, true , _getfield );
482 def(_fast_bgetfield , "fast_bgetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield );
483 def(_fast_cgetfield , "fast_cgetfield" , "bJJ" , NULL , T_CHAR , 0, true , _getfield );
484 def(_fast_dgetfield , "fast_dgetfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _getfield );
485 def(_fast_fgetfield , "fast_fgetfield" , "bJJ" , NULL , T_FLOAT , 0, true , _getfield );
486 def(_fast_igetfield , "fast_igetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield );
487 def(_fast_lgetfield , "fast_lgetfield" , "bJJ" , NULL , T_LONG , 0, true , _getfield );
488 def(_fast_sgetfield , "fast_sgetfield" , "bJJ" , NULL , T_SHORT , 0, true , _getfield );
489
490 def(_fast_aputfield , "fast_aputfield" , "bJJ" , NULL , T_OBJECT , 0, true , _putfield );
491 def(_fast_bputfield , "fast_bputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield );
492 def(_fast_zputfield , "fast_zputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield );
493 def(_fast_cputfield , "fast_cputfield" , "bJJ" , NULL , T_CHAR , 0, true , _putfield );
494 def(_fast_dputfield , "fast_dputfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _putfield );
495 def(_fast_fputfield , "fast_fputfield" , "bJJ" , NULL , T_FLOAT , 0, true , _putfield );
496 def(_fast_iputfield , "fast_iputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield );
497 def(_fast_lputfield , "fast_lputfield" , "bJJ" , NULL , T_LONG , 0, true , _putfield );
498 def(_fast_sputfield , "fast_sputfield" , "bJJ" , NULL , T_SHORT , 0, true , _putfield );
499
500 def(_fast_aload_0 , "fast_aload_0" , "b" , NULL , T_OBJECT , 1, true , _aload_0 );
501 def(_fast_iaccess_0 , "fast_iaccess_0" , "b_JJ" , NULL , T_INT , 1, true , _aload_0 );
502 def(_fast_aaccess_0 , "fast_aaccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 );
503 def(_fast_faccess_0 , "fast_faccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 );
504
505 def(_fast_iload , "fast_iload" , "bi" , NULL , T_INT , 1, false, _iload);
506 def(_fast_iload2 , "fast_iload2" , "bi_i" , NULL , T_INT , 2, false, _iload);
507 def(_fast_icaload , "fast_icaload" , "bi_" , NULL , T_INT , 0, false, _iload);
508
509 // Faster method invocation.
510 def(_fast_invokevfinal , "fast_invokevfinal" , "bJJ" , NULL , T_ILLEGAL, -1, true, _invokevirtual );
511
512 def(_fast_linearswitch , "fast_linearswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch );
513 def(_fast_binaryswitch , "fast_binaryswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch );
514
515 def(_return_register_finalizer , "return_register_finalizer" , "b" , NULL , T_VOID , 0, true, _return);
516
517 def(_invokehandle , "invokehandle" , "bJJ" , NULL , T_ILLEGAL, -1, true, _invokevirtual );
518
519 def(_fast_aldc , "fast_aldc" , "bj" , NULL , T_OBJECT, 1, true, _ldc );
520 def(_fast_aldc_w , "fast_aldc_w" , "bJJ" , NULL , T_OBJECT, 1, true, _ldc_w );
521
522 def(_nofast_getfield , "nofast_getfield" , "bJJ" , NULL , T_ILLEGAL, 0, true, _getfield );
523 def(_nofast_putfield , "nofast_putfield" , "bJJ" , NULL , T_ILLEGAL, -2, true , _putfield );
524
525 def(_nofast_aload_0 , "nofast_aload_0" , "b" , NULL , T_OBJECT, 1, true , _aload_0 );
526 def(_nofast_iload , "nofast_iload" , "bi" , NULL , T_INT, 1, false, _iload );
527
528 def(_shouldnotreachhere , "_shouldnotreachhere" , "b" , NULL , T_VOID , 0, false);
529
530 // compare can_trap information for each bytecode with the
531 // can_trap information for the corresponding base bytecode
532 // (if a rewritten bytecode can trap, so must the base bytecode)
533 #ifdef ASSERT
534 { for (int i = 0; i < number_of_codes; i++) {
535 if (is_defined(i)) {
536 Code code = cast(i);
537 Code java = java_code(code);
538 if (can_trap(code) && !can_trap(java))
539 fatal("%s can trap => %s can trap, too", name(code), name(java));
540 }
541 }
542 }
543 #endif
544
545 // initialization successful
546 _is_initialized = true;
547 }
548
549
550 void bytecodes_init() {
551 Bytecodes::initialize();
552 }
553
554 // Restore optimization
555 #ifdef _M_AMD64
556 #pragma optimize ("", on)
557 #endif