bytecodes.cpp revision 9056:dc9930a04ab0
1/* 2 * Copyright (c) 1997, 2014, 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/bytes.hpp" 30 31 32#if defined(WIN32) && (defined(_MSC_VER) && (_MSC_VER < 1600)) 33// Windows AMD64 Compiler Hangs compiling this file 34// unless optimization is off 35#ifdef _M_AMD64 36#pragma optimize ("", off) 37#endif 38#endif 39 40 41bool Bytecodes::_is_initialized = false; 42const char* Bytecodes::_name [Bytecodes::number_of_codes]; 43BasicType Bytecodes::_result_type [Bytecodes::number_of_codes]; 44s_char Bytecodes::_depth [Bytecodes::number_of_codes]; 45u_char Bytecodes::_lengths [Bytecodes::number_of_codes]; 46Bytecodes::Code Bytecodes::_java_code [Bytecodes::number_of_codes]; 47u_short Bytecodes::_flags [(1<<BitsPerByte)*2]; 48 49#ifdef ASSERT 50bool Bytecodes::check_method(const Method* method, address bcp) { 51 return method->contains(bcp); 52} 53#endif 54 55bool Bytecodes::check_must_rewrite(Bytecodes::Code code) { 56 assert(can_rewrite(code), "post-check only"); 57 58 // Some codes are conditionally rewriting. Look closely at them. 59 switch (code) { 60 case Bytecodes::_aload_0: 61 // Even if RewriteFrequentPairs is turned on, 62 // the _aload_0 code might delay its rewrite until 63 // a following _getfield rewrites itself. 64 return false; 65 66 case Bytecodes::_lookupswitch: 67 return false; // the rewrite is not done by the interpreter 68 69 case Bytecodes::_new: 70 // (Could actually look at the class here, but the profit would be small.) 71 return false; // the rewrite is not always done 72 } 73 74 // No other special cases. 75 return true; 76} 77 78Bytecodes::Code Bytecodes::code_at(Method* method, int bci) { 79 return code_at(method, method->bcp_from(bci)); 80} 81 82Bytecodes::Code Bytecodes::non_breakpoint_code_at(const Method* method, address bcp) { 83 assert(method != NULL, "must have the method for breakpoint conversion"); 84 assert(method->contains(bcp), "must be valid bcp in method"); 85 return method->orig_bytecode_at(method->bci_from(bcp)); 86} 87 88int Bytecodes::special_length_at(Bytecodes::Code code, address bcp, address end) { 89 switch (code) { 90 case _wide: 91 if (end != NULL && bcp + 1 >= end) { 92 return -1; // don't read past end of code buffer 93 } 94 return wide_length_for(cast(*(bcp + 1))); 95 case _tableswitch: 96 { address aligned_bcp = (address)round_to((intptr_t)bcp + 1, jintSize); 97 if (end != NULL && aligned_bcp + 3*jintSize >= end) { 98 return -1; // don't read past end of code buffer 99 } 100 jlong lo = (jint)Bytes::get_Java_u4(aligned_bcp + 1*jintSize); 101 jlong hi = (jint)Bytes::get_Java_u4(aligned_bcp + 2*jintSize); 102 jlong len = (aligned_bcp - bcp) + (3 + hi - lo + 1)*jintSize; 103 // only return len if it can be represented as a positive int; 104 // return -1 otherwise 105 return (len > 0 && len == (int)len) ? len : -1; 106 } 107 108 case _lookupswitch: // fall through 109 case _fast_binaryswitch: // fall through 110 case _fast_linearswitch: 111 { address aligned_bcp = (address)round_to((intptr_t)bcp + 1, jintSize); 112 if (end != NULL && aligned_bcp + 2*jintSize >= end) { 113 return -1; // don't read past end of code buffer 114 } 115 jlong npairs = (jint)Bytes::get_Java_u4(aligned_bcp + jintSize); 116 jlong len = (aligned_bcp - bcp) + (2 + 2*npairs)*jintSize; 117 // only return len if it can be represented as a positive int; 118 // return -1 otherwise 119 return (len > 0 && len == (int)len) ? len : -1; 120 } 121 } 122 // Note: Length functions must return <=0 for invalid bytecodes. 123 return 0; 124} 125 126// At a breakpoint instruction, this returns the breakpoint's length, 127// otherwise, it's the same as special_length_at(). This is used by 128// the RawByteCodeStream, which wants to see the actual bytecode 129// values (including breakpoint). RawByteCodeStream is used by the 130// verifier when reading in bytecode to verify. Other mechanisms that 131// run at runtime (such as generateOopMaps) need to iterate over the code 132// and don't expect to see breakpoints: they want to see the instruction 133// which was replaced so that they can get the correct length and find 134// the next bytecode. 135// 136// 'end' indicates the end of the code buffer, which we should not try to read 137// past. 138int Bytecodes::raw_special_length_at(address bcp, address end) { 139 Code code = code_or_bp_at(bcp); 140 if (code == _breakpoint) { 141 return 1; 142 } else { 143 return special_length_at(code, bcp, end); 144 } 145} 146 147 148 149void Bytecodes::def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap) { 150 def(code, name, format, wide_format, result_type, depth, can_trap, code); 151} 152 153 154void 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) { 155 assert(wide_format == NULL || format != NULL, "short form must exist if there's a wide form"); 156 int len = (format != NULL ? (int) strlen(format) : 0); 157 int wlen = (wide_format != NULL ? (int) strlen(wide_format) : 0); 158 _name [code] = name; 159 _result_type [code] = result_type; 160 _depth [code] = depth; 161 _lengths [code] = (wlen << 4) | (len & 0xF); 162 _java_code [code] = java_code; 163 int bc_flags = 0; 164 if (can_trap) bc_flags |= _bc_can_trap; 165 if (java_code != code) bc_flags |= _bc_can_rewrite; 166 _flags[(u1)code+0*(1<<BitsPerByte)] = compute_flags(format, bc_flags); 167 _flags[(u1)code+1*(1<<BitsPerByte)] = compute_flags(wide_format, bc_flags); 168 assert(is_defined(code) == (format != NULL), ""); 169 assert(wide_is_defined(code) == (wide_format != NULL), ""); 170 assert(length_for(code) == len, ""); 171 assert(wide_length_for(code) == wlen, ""); 172} 173 174 175// Format strings interpretation: 176// 177// b: bytecode 178// c: signed constant, Java byte-ordering 179// i: unsigned local index, Java byte-ordering (I = native byte ordering) 180// j: unsigned CP cache index, Java byte-ordering (J = native byte ordering) 181// k: unsigned CP index, Java byte-ordering 182// o: branch offset, Java byte-ordering 183// _: unused/ignored 184// w: wide bytecode 185// 186// Note: The format strings are used for 2 purposes: 187// 1. to specify the length of the bytecode 188// (= number of characters in format string) 189// 2. to derive bytecode format flags (_fmt_has_k, etc.) 190// 191// Note: For bytecodes with variable length, the format string is the empty string. 192 193int Bytecodes::compute_flags(const char* format, int more_flags) { 194 if (format == NULL) return 0; // not even more_flags 195 int flags = more_flags; 196 const char* fp = format; 197 switch (*fp) { 198 case '\0': 199 flags |= _fmt_not_simple; // but variable 200 break; 201 case 'b': 202 flags |= _fmt_not_variable; // but simple 203 ++fp; // skip 'b' 204 break; 205 case 'w': 206 flags |= _fmt_not_variable | _fmt_not_simple; 207 ++fp; // skip 'w' 208 guarantee(*fp == 'b', "wide format must start with 'wb'"); 209 ++fp; // skip 'b' 210 break; 211 } 212 213 int has_nbo = 0, has_jbo = 0, has_size = 0; 214 for (;;) { 215 int this_flag = 0; 216 char fc = *fp++; 217 switch (fc) { 218 case '\0': // end of string 219 assert(flags == (jchar)flags, "change _format_flags"); 220 return flags; 221 222 case '_': continue; // ignore these 223 224 case 'j': this_flag = _fmt_has_j; has_jbo = 1; break; 225 case 'k': this_flag = _fmt_has_k; has_jbo = 1; break; 226 case 'i': this_flag = _fmt_has_i; has_jbo = 1; break; 227 case 'c': this_flag = _fmt_has_c; has_jbo = 1; break; 228 case 'o': this_flag = _fmt_has_o; has_jbo = 1; break; 229 230 // uppercase versions mark native byte order (from Rewriter) 231 // actually, only the 'J' case happens currently 232 case 'J': this_flag = _fmt_has_j; has_nbo = 1; break; 233 case 'K': this_flag = _fmt_has_k; has_nbo = 1; break; 234 case 'I': this_flag = _fmt_has_i; has_nbo = 1; break; 235 case 'C': this_flag = _fmt_has_c; has_nbo = 1; break; 236 case 'O': this_flag = _fmt_has_o; has_nbo = 1; break; 237 default: guarantee(false, "bad char in format"); 238 } 239 240 flags |= this_flag; 241 242 guarantee(!(has_jbo && has_nbo), "mixed byte orders in format"); 243 if (has_nbo) 244 flags |= _fmt_has_nbo; 245 246 int this_size = 1; 247 if (*fp == fc) { 248 // advance beyond run of the same characters 249 this_size = 2; 250 while (*++fp == fc) this_size++; 251 switch (this_size) { 252 case 2: flags |= _fmt_has_u2; break; 253 case 4: flags |= _fmt_has_u4; break; 254 default: guarantee(false, "bad rep count in format"); 255 } 256 } 257 guarantee(has_size == 0 || // no field yet 258 this_size == has_size || // same size 259 this_size < has_size && *fp == '\0', // last field can be short 260 "mixed field sizes in format"); 261 has_size = this_size; 262 } 263} 264 265void Bytecodes::initialize() { 266 if (_is_initialized) return; 267 assert(number_of_codes <= 256, "too many bytecodes"); 268 269 // initialize bytecode tables - didn't use static array initializers 270 // (such as {}) so we can do additional consistency checks and init- 271 // code is independent of actual bytecode numbering. 272 // 273 // Note 1: NULL for the format string means the bytecode doesn't exist 274 // in that form. 275 // 276 // Note 2: The result type is T_ILLEGAL for bytecodes where the top of stack 277 // type after execution is not only determined by the bytecode itself. 278 279 // Java bytecodes 280 // bytecode bytecode name format wide f. result tp stk traps 281 def(_nop , "nop" , "b" , NULL , T_VOID , 0, false); 282 def(_aconst_null , "aconst_null" , "b" , NULL , T_OBJECT , 1, false); 283 def(_iconst_m1 , "iconst_m1" , "b" , NULL , T_INT , 1, false); 284 def(_iconst_0 , "iconst_0" , "b" , NULL , T_INT , 1, false); 285 def(_iconst_1 , "iconst_1" , "b" , NULL , T_INT , 1, false); 286 def(_iconst_2 , "iconst_2" , "b" , NULL , T_INT , 1, false); 287 def(_iconst_3 , "iconst_3" , "b" , NULL , T_INT , 1, false); 288 def(_iconst_4 , "iconst_4" , "b" , NULL , T_INT , 1, false); 289 def(_iconst_5 , "iconst_5" , "b" , NULL , T_INT , 1, false); 290 def(_lconst_0 , "lconst_0" , "b" , NULL , T_LONG , 2, false); 291 def(_lconst_1 , "lconst_1" , "b" , NULL , T_LONG , 2, false); 292 def(_fconst_0 , "fconst_0" , "b" , NULL , T_FLOAT , 1, false); 293 def(_fconst_1 , "fconst_1" , "b" , NULL , T_FLOAT , 1, false); 294 def(_fconst_2 , "fconst_2" , "b" , NULL , T_FLOAT , 1, false); 295 def(_dconst_0 , "dconst_0" , "b" , NULL , T_DOUBLE , 2, false); 296 def(_dconst_1 , "dconst_1" , "b" , NULL , T_DOUBLE , 2, false); 297 def(_bipush , "bipush" , "bc" , NULL , T_INT , 1, false); 298 def(_sipush , "sipush" , "bcc" , NULL , T_INT , 1, false); 299 def(_ldc , "ldc" , "bk" , NULL , T_ILLEGAL, 1, true ); 300 def(_ldc_w , "ldc_w" , "bkk" , NULL , T_ILLEGAL, 1, true ); 301 def(_ldc2_w , "ldc2_w" , "bkk" , NULL , T_ILLEGAL, 2, true ); 302 def(_iload , "iload" , "bi" , "wbii" , T_INT , 1, false); 303 def(_lload , "lload" , "bi" , "wbii" , T_LONG , 2, false); 304 def(_fload , "fload" , "bi" , "wbii" , T_FLOAT , 1, false); 305 def(_dload , "dload" , "bi" , "wbii" , T_DOUBLE , 2, false); 306 def(_aload , "aload" , "bi" , "wbii" , T_OBJECT , 1, false); 307 def(_iload_0 , "iload_0" , "b" , NULL , T_INT , 1, false); 308 def(_iload_1 , "iload_1" , "b" , NULL , T_INT , 1, false); 309 def(_iload_2 , "iload_2" , "b" , NULL , T_INT , 1, false); 310 def(_iload_3 , "iload_3" , "b" , NULL , T_INT , 1, false); 311 def(_lload_0 , "lload_0" , "b" , NULL , T_LONG , 2, false); 312 def(_lload_1 , "lload_1" , "b" , NULL , T_LONG , 2, false); 313 def(_lload_2 , "lload_2" , "b" , NULL , T_LONG , 2, false); 314 def(_lload_3 , "lload_3" , "b" , NULL , T_LONG , 2, false); 315 def(_fload_0 , "fload_0" , "b" , NULL , T_FLOAT , 1, false); 316 def(_fload_1 , "fload_1" , "b" , NULL , T_FLOAT , 1, false); 317 def(_fload_2 , "fload_2" , "b" , NULL , T_FLOAT , 1, false); 318 def(_fload_3 , "fload_3" , "b" , NULL , T_FLOAT , 1, false); 319 def(_dload_0 , "dload_0" , "b" , NULL , T_DOUBLE , 2, false); 320 def(_dload_1 , "dload_1" , "b" , NULL , T_DOUBLE , 2, false); 321 def(_dload_2 , "dload_2" , "b" , NULL , T_DOUBLE , 2, false); 322 def(_dload_3 , "dload_3" , "b" , NULL , T_DOUBLE , 2, false); 323 def(_aload_0 , "aload_0" , "b" , NULL , T_OBJECT , 1, true ); // rewriting in interpreter 324 def(_aload_1 , "aload_1" , "b" , NULL , T_OBJECT , 1, false); 325 def(_aload_2 , "aload_2" , "b" , NULL , T_OBJECT , 1, false); 326 def(_aload_3 , "aload_3" , "b" , NULL , T_OBJECT , 1, false); 327 def(_iaload , "iaload" , "b" , NULL , T_INT , -1, true ); 328 def(_laload , "laload" , "b" , NULL , T_LONG , 0, true ); 329 def(_faload , "faload" , "b" , NULL , T_FLOAT , -1, true ); 330 def(_daload , "daload" , "b" , NULL , T_DOUBLE , 0, true ); 331 def(_aaload , "aaload" , "b" , NULL , T_OBJECT , -1, true ); 332 def(_baload , "baload" , "b" , NULL , T_INT , -1, true ); 333 def(_caload , "caload" , "b" , NULL , T_INT , -1, true ); 334 def(_saload , "saload" , "b" , NULL , T_INT , -1, true ); 335 def(_istore , "istore" , "bi" , "wbii" , T_VOID , -1, false); 336 def(_lstore , "lstore" , "bi" , "wbii" , T_VOID , -2, false); 337 def(_fstore , "fstore" , "bi" , "wbii" , T_VOID , -1, false); 338 def(_dstore , "dstore" , "bi" , "wbii" , T_VOID , -2, false); 339 def(_astore , "astore" , "bi" , "wbii" , T_VOID , -1, false); 340 def(_istore_0 , "istore_0" , "b" , NULL , T_VOID , -1, false); 341 def(_istore_1 , "istore_1" , "b" , NULL , T_VOID , -1, false); 342 def(_istore_2 , "istore_2" , "b" , NULL , T_VOID , -1, false); 343 def(_istore_3 , "istore_3" , "b" , NULL , T_VOID , -1, false); 344 def(_lstore_0 , "lstore_0" , "b" , NULL , T_VOID , -2, false); 345 def(_lstore_1 , "lstore_1" , "b" , NULL , T_VOID , -2, false); 346 def(_lstore_2 , "lstore_2" , "b" , NULL , T_VOID , -2, false); 347 def(_lstore_3 , "lstore_3" , "b" , NULL , T_VOID , -2, false); 348 def(_fstore_0 , "fstore_0" , "b" , NULL , T_VOID , -1, false); 349 def(_fstore_1 , "fstore_1" , "b" , NULL , T_VOID , -1, false); 350 def(_fstore_2 , "fstore_2" , "b" , NULL , T_VOID , -1, false); 351 def(_fstore_3 , "fstore_3" , "b" , NULL , T_VOID , -1, false); 352 def(_dstore_0 , "dstore_0" , "b" , NULL , T_VOID , -2, false); 353 def(_dstore_1 , "dstore_1" , "b" , NULL , T_VOID , -2, false); 354 def(_dstore_2 , "dstore_2" , "b" , NULL , T_VOID , -2, false); 355 def(_dstore_3 , "dstore_3" , "b" , NULL , T_VOID , -2, false); 356 def(_astore_0 , "astore_0" , "b" , NULL , T_VOID , -1, false); 357 def(_astore_1 , "astore_1" , "b" , NULL , T_VOID , -1, false); 358 def(_astore_2 , "astore_2" , "b" , NULL , T_VOID , -1, false); 359 def(_astore_3 , "astore_3" , "b" , NULL , T_VOID , -1, false); 360 def(_iastore , "iastore" , "b" , NULL , T_VOID , -3, true ); 361 def(_lastore , "lastore" , "b" , NULL , T_VOID , -4, true ); 362 def(_fastore , "fastore" , "b" , NULL , T_VOID , -3, true ); 363 def(_dastore , "dastore" , "b" , NULL , T_VOID , -4, true ); 364 def(_aastore , "aastore" , "b" , NULL , T_VOID , -3, true ); 365 def(_bastore , "bastore" , "b" , NULL , T_VOID , -3, true ); 366 def(_castore , "castore" , "b" , NULL , T_VOID , -3, true ); 367 def(_sastore , "sastore" , "b" , NULL , T_VOID , -3, true ); 368 def(_pop , "pop" , "b" , NULL , T_VOID , -1, false); 369 def(_pop2 , "pop2" , "b" , NULL , T_VOID , -2, false); 370 def(_dup , "dup" , "b" , NULL , T_VOID , 1, false); 371 def(_dup_x1 , "dup_x1" , "b" , NULL , T_VOID , 1, false); 372 def(_dup_x2 , "dup_x2" , "b" , NULL , T_VOID , 1, false); 373 def(_dup2 , "dup2" , "b" , NULL , T_VOID , 2, false); 374 def(_dup2_x1 , "dup2_x1" , "b" , NULL , T_VOID , 2, false); 375 def(_dup2_x2 , "dup2_x2" , "b" , NULL , T_VOID , 2, false); 376 def(_swap , "swap" , "b" , NULL , T_VOID , 0, false); 377 def(_iadd , "iadd" , "b" , NULL , T_INT , -1, false); 378 def(_ladd , "ladd" , "b" , NULL , T_LONG , -2, false); 379 def(_fadd , "fadd" , "b" , NULL , T_FLOAT , -1, false); 380 def(_dadd , "dadd" , "b" , NULL , T_DOUBLE , -2, false); 381 def(_isub , "isub" , "b" , NULL , T_INT , -1, false); 382 def(_lsub , "lsub" , "b" , NULL , T_LONG , -2, false); 383 def(_fsub , "fsub" , "b" , NULL , T_FLOAT , -1, false); 384 def(_dsub , "dsub" , "b" , NULL , T_DOUBLE , -2, false); 385 def(_imul , "imul" , "b" , NULL , T_INT , -1, false); 386 def(_lmul , "lmul" , "b" , NULL , T_LONG , -2, false); 387 def(_fmul , "fmul" , "b" , NULL , T_FLOAT , -1, false); 388 def(_dmul , "dmul" , "b" , NULL , T_DOUBLE , -2, false); 389 def(_idiv , "idiv" , "b" , NULL , T_INT , -1, true ); 390 def(_ldiv , "ldiv" , "b" , NULL , T_LONG , -2, true ); 391 def(_fdiv , "fdiv" , "b" , NULL , T_FLOAT , -1, false); 392 def(_ddiv , "ddiv" , "b" , NULL , T_DOUBLE , -2, false); 393 def(_irem , "irem" , "b" , NULL , T_INT , -1, true ); 394 def(_lrem , "lrem" , "b" , NULL , T_LONG , -2, true ); 395 def(_frem , "frem" , "b" , NULL , T_FLOAT , -1, false); 396 def(_drem , "drem" , "b" , NULL , T_DOUBLE , -2, false); 397 def(_ineg , "ineg" , "b" , NULL , T_INT , 0, false); 398 def(_lneg , "lneg" , "b" , NULL , T_LONG , 0, false); 399 def(_fneg , "fneg" , "b" , NULL , T_FLOAT , 0, false); 400 def(_dneg , "dneg" , "b" , NULL , T_DOUBLE , 0, false); 401 def(_ishl , "ishl" , "b" , NULL , T_INT , -1, false); 402 def(_lshl , "lshl" , "b" , NULL , T_LONG , -1, false); 403 def(_ishr , "ishr" , "b" , NULL , T_INT , -1, false); 404 def(_lshr , "lshr" , "b" , NULL , T_LONG , -1, false); 405 def(_iushr , "iushr" , "b" , NULL , T_INT , -1, false); 406 def(_lushr , "lushr" , "b" , NULL , T_LONG , -1, false); 407 def(_iand , "iand" , "b" , NULL , T_INT , -1, false); 408 def(_land , "land" , "b" , NULL , T_LONG , -2, false); 409 def(_ior , "ior" , "b" , NULL , T_INT , -1, false); 410 def(_lor , "lor" , "b" , NULL , T_LONG , -2, false); 411 def(_ixor , "ixor" , "b" , NULL , T_INT , -1, false); 412 def(_lxor , "lxor" , "b" , NULL , T_LONG , -2, false); 413 def(_iinc , "iinc" , "bic" , "wbiicc", T_VOID , 0, false); 414 def(_i2l , "i2l" , "b" , NULL , T_LONG , 1, false); 415 def(_i2f , "i2f" , "b" , NULL , T_FLOAT , 0, false); 416 def(_i2d , "i2d" , "b" , NULL , T_DOUBLE , 1, false); 417 def(_l2i , "l2i" , "b" , NULL , T_INT , -1, false); 418 def(_l2f , "l2f" , "b" , NULL , T_FLOAT , -1, false); 419 def(_l2d , "l2d" , "b" , NULL , T_DOUBLE , 0, false); 420 def(_f2i , "f2i" , "b" , NULL , T_INT , 0, false); 421 def(_f2l , "f2l" , "b" , NULL , T_LONG , 1, false); 422 def(_f2d , "f2d" , "b" , NULL , T_DOUBLE , 1, false); 423 def(_d2i , "d2i" , "b" , NULL , T_INT , -1, false); 424 def(_d2l , "d2l" , "b" , NULL , T_LONG , 0, false); 425 def(_d2f , "d2f" , "b" , NULL , T_FLOAT , -1, false); 426 def(_i2b , "i2b" , "b" , NULL , T_BYTE , 0, false); 427 def(_i2c , "i2c" , "b" , NULL , T_CHAR , 0, false); 428 def(_i2s , "i2s" , "b" , NULL , T_SHORT , 0, false); 429 def(_lcmp , "lcmp" , "b" , NULL , T_VOID , -3, false); 430 def(_fcmpl , "fcmpl" , "b" , NULL , T_VOID , -1, false); 431 def(_fcmpg , "fcmpg" , "b" , NULL , T_VOID , -1, false); 432 def(_dcmpl , "dcmpl" , "b" , NULL , T_VOID , -3, false); 433 def(_dcmpg , "dcmpg" , "b" , NULL , T_VOID , -3, false); 434 def(_ifeq , "ifeq" , "boo" , NULL , T_VOID , -1, false); 435 def(_ifne , "ifne" , "boo" , NULL , T_VOID , -1, false); 436 def(_iflt , "iflt" , "boo" , NULL , T_VOID , -1, false); 437 def(_ifge , "ifge" , "boo" , NULL , T_VOID , -1, false); 438 def(_ifgt , "ifgt" , "boo" , NULL , T_VOID , -1, false); 439 def(_ifle , "ifle" , "boo" , NULL , T_VOID , -1, false); 440 def(_if_icmpeq , "if_icmpeq" , "boo" , NULL , T_VOID , -2, false); 441 def(_if_icmpne , "if_icmpne" , "boo" , NULL , T_VOID , -2, false); 442 def(_if_icmplt , "if_icmplt" , "boo" , NULL , T_VOID , -2, false); 443 def(_if_icmpge , "if_icmpge" , "boo" , NULL , T_VOID , -2, false); 444 def(_if_icmpgt , "if_icmpgt" , "boo" , NULL , T_VOID , -2, false); 445 def(_if_icmple , "if_icmple" , "boo" , NULL , T_VOID , -2, false); 446 def(_if_acmpeq , "if_acmpeq" , "boo" , NULL , T_VOID , -2, false); 447 def(_if_acmpne , "if_acmpne" , "boo" , NULL , T_VOID , -2, false); 448 def(_goto , "goto" , "boo" , NULL , T_VOID , 0, false); 449 def(_jsr , "jsr" , "boo" , NULL , T_INT , 0, false); 450 def(_ret , "ret" , "bi" , "wbii" , T_VOID , 0, false); 451 def(_tableswitch , "tableswitch" , "" , NULL , T_VOID , -1, false); // may have backward branches 452 def(_lookupswitch , "lookupswitch" , "" , NULL , T_VOID , -1, false); // rewriting in interpreter 453 def(_ireturn , "ireturn" , "b" , NULL , T_INT , -1, true); 454 def(_lreturn , "lreturn" , "b" , NULL , T_LONG , -2, true); 455 def(_freturn , "freturn" , "b" , NULL , T_FLOAT , -1, true); 456 def(_dreturn , "dreturn" , "b" , NULL , T_DOUBLE , -2, true); 457 def(_areturn , "areturn" , "b" , NULL , T_OBJECT , -1, true); 458 def(_return , "return" , "b" , NULL , T_VOID , 0, true); 459 def(_getstatic , "getstatic" , "bJJ" , NULL , T_ILLEGAL, 1, true ); 460 def(_putstatic , "putstatic" , "bJJ" , NULL , T_ILLEGAL, -1, true ); 461 def(_getfield , "getfield" , "bJJ" , NULL , T_ILLEGAL, 0, true ); 462 def(_putfield , "putfield" , "bJJ" , NULL , T_ILLEGAL, -2, true ); 463 def(_invokevirtual , "invokevirtual" , "bJJ" , NULL , T_ILLEGAL, -1, true); 464 def(_invokespecial , "invokespecial" , "bJJ" , NULL , T_ILLEGAL, -1, true); 465 def(_invokestatic , "invokestatic" , "bJJ" , NULL , T_ILLEGAL, 0, true); 466 def(_invokeinterface , "invokeinterface" , "bJJ__", NULL , T_ILLEGAL, -1, true); 467 def(_invokedynamic , "invokedynamic" , "bJJJJ", NULL , T_ILLEGAL, 0, true ); 468 def(_new , "new" , "bkk" , NULL , T_OBJECT , 1, true ); 469 def(_newarray , "newarray" , "bc" , NULL , T_OBJECT , 0, true ); 470 def(_anewarray , "anewarray" , "bkk" , NULL , T_OBJECT , 0, true ); 471 def(_arraylength , "arraylength" , "b" , NULL , T_VOID , 0, true ); 472 def(_athrow , "athrow" , "b" , NULL , T_VOID , -1, true ); 473 def(_checkcast , "checkcast" , "bkk" , NULL , T_OBJECT , 0, true ); 474 def(_instanceof , "instanceof" , "bkk" , NULL , T_INT , 0, true ); 475 def(_monitorenter , "monitorenter" , "b" , NULL , T_VOID , -1, true ); 476 def(_monitorexit , "monitorexit" , "b" , NULL , T_VOID , -1, true ); 477 def(_wide , "wide" , "" , NULL , T_VOID , 0, false); 478 def(_multianewarray , "multianewarray" , "bkkc" , NULL , T_OBJECT , 1, true ); 479 def(_ifnull , "ifnull" , "boo" , NULL , T_VOID , -1, false); 480 def(_ifnonnull , "ifnonnull" , "boo" , NULL , T_VOID , -1, false); 481 def(_goto_w , "goto_w" , "boooo", NULL , T_VOID , 0, false); 482 def(_jsr_w , "jsr_w" , "boooo", NULL , T_INT , 0, false); 483 def(_breakpoint , "breakpoint" , "" , NULL , T_VOID , 0, true); 484 485 // JVM bytecodes 486 // bytecode bytecode name format wide f. result tp stk traps std code 487 488 def(_fast_agetfield , "fast_agetfield" , "bJJ" , NULL , T_OBJECT , 0, true , _getfield ); 489 def(_fast_bgetfield , "fast_bgetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield ); 490 def(_fast_cgetfield , "fast_cgetfield" , "bJJ" , NULL , T_CHAR , 0, true , _getfield ); 491 def(_fast_dgetfield , "fast_dgetfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _getfield ); 492 def(_fast_fgetfield , "fast_fgetfield" , "bJJ" , NULL , T_FLOAT , 0, true , _getfield ); 493 def(_fast_igetfield , "fast_igetfield" , "bJJ" , NULL , T_INT , 0, true , _getfield ); 494 def(_fast_lgetfield , "fast_lgetfield" , "bJJ" , NULL , T_LONG , 0, true , _getfield ); 495 def(_fast_sgetfield , "fast_sgetfield" , "bJJ" , NULL , T_SHORT , 0, true , _getfield ); 496 497 def(_fast_aputfield , "fast_aputfield" , "bJJ" , NULL , T_OBJECT , 0, true , _putfield ); 498 def(_fast_bputfield , "fast_bputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield ); 499 def(_fast_cputfield , "fast_cputfield" , "bJJ" , NULL , T_CHAR , 0, true , _putfield ); 500 def(_fast_dputfield , "fast_dputfield" , "bJJ" , NULL , T_DOUBLE , 0, true , _putfield ); 501 def(_fast_fputfield , "fast_fputfield" , "bJJ" , NULL , T_FLOAT , 0, true , _putfield ); 502 def(_fast_iputfield , "fast_iputfield" , "bJJ" , NULL , T_INT , 0, true , _putfield ); 503 def(_fast_lputfield , "fast_lputfield" , "bJJ" , NULL , T_LONG , 0, true , _putfield ); 504 def(_fast_sputfield , "fast_sputfield" , "bJJ" , NULL , T_SHORT , 0, true , _putfield ); 505 506 def(_fast_aload_0 , "fast_aload_0" , "b" , NULL , T_OBJECT , 1, true , _aload_0 ); 507 def(_fast_iaccess_0 , "fast_iaccess_0" , "b_JJ" , NULL , T_INT , 1, true , _aload_0 ); 508 def(_fast_aaccess_0 , "fast_aaccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 ); 509 def(_fast_faccess_0 , "fast_faccess_0" , "b_JJ" , NULL , T_OBJECT , 1, true , _aload_0 ); 510 511 def(_fast_iload , "fast_iload" , "bi" , NULL , T_INT , 1, false, _iload); 512 def(_fast_iload2 , "fast_iload2" , "bi_i" , NULL , T_INT , 2, false, _iload); 513 def(_fast_icaload , "fast_icaload" , "bi_" , NULL , T_INT , 0, false, _iload); 514 515 // Faster method invocation. 516 def(_fast_invokevfinal , "fast_invokevfinal" , "bJJ" , NULL , T_ILLEGAL, -1, true, _invokevirtual ); 517 518 def(_fast_linearswitch , "fast_linearswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch ); 519 def(_fast_binaryswitch , "fast_binaryswitch" , "" , NULL , T_VOID , -1, false, _lookupswitch ); 520 521 def(_return_register_finalizer , "return_register_finalizer" , "b" , NULL , T_VOID , 0, true, _return); 522 523 def(_invokehandle , "invokehandle" , "bJJ" , NULL , T_ILLEGAL, -1, true, _invokevirtual ); 524 525 def(_fast_aldc , "fast_aldc" , "bj" , NULL , T_OBJECT, 1, true, _ldc ); 526 def(_fast_aldc_w , "fast_aldc_w" , "bJJ" , NULL , T_OBJECT, 1, true, _ldc_w ); 527 528 def(_nofast_getfield , "nofast_getfield" , "bJJ" , NULL , T_ILLEGAL, 0, true, _getfield ); 529 def(_nofast_putfield , "nofast_putfield" , "bJJ" , NULL , T_ILLEGAL, -2, true , _putfield ); 530 531 def(_nofast_aload_0 , "nofast_aload_0" , "b" , NULL , T_ILLEGAL, 1, true , _aload_0 ); 532 def(_nofast_iload , "nofast_iload" , "bi" , NULL , T_ILLEGAL, 1, false, _iload ); 533 534 def(_shouldnotreachhere , "_shouldnotreachhere" , "b" , NULL , T_VOID , 0, false); 535 536 // compare can_trap information for each bytecode with the 537 // can_trap information for the corresponding base bytecode 538 // (if a rewritten bytecode can trap, so must the base bytecode) 539 #ifdef ASSERT 540 { for (int i = 0; i < number_of_codes; i++) { 541 if (is_defined(i)) { 542 Code code = cast(i); 543 Code java = java_code(code); 544 if (can_trap(code) && !can_trap(java)) 545 fatal("%s can trap => %s can trap, too", name(code), name(java)); 546 } 547 } 548 } 549 #endif 550 551 // initialization successful 552 _is_initialized = true; 553} 554 555 556void bytecodes_init() { 557 Bytecodes::initialize(); 558} 559 560// Restore optimization 561#ifdef _M_AMD64 562#pragma optimize ("", on) 563#endif 564