bytecodes.hpp revision 3602:da91efe96a93
1215976Sjmallett/* 2232812Sjmallett * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3215976Sjmallett * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4215976Sjmallett * 5215976Sjmallett * This code is free software; you can redistribute it and/or modify it 6215976Sjmallett * under the terms of the GNU General Public License version 2 only, as 7215976Sjmallett * published by the Free Software Foundation. 8215976Sjmallett * 9215976Sjmallett * This code is distributed in the hope that it will be useful, but WITHOUT 10215976Sjmallett * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11215976Sjmallett * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12215976Sjmallett * version 2 for more details (a copy is included in the LICENSE file that 13215976Sjmallett * accompanied this code). 14215976Sjmallett * 15215976Sjmallett * You should have received a copy of the GNU General Public License version 16215976Sjmallett * 2 along with this work; if not, write to the Free Software Foundation, 17215976Sjmallett * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18232812Sjmallett * 19215976Sjmallett * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20215976Sjmallett * or visit www.oracle.com if you need additional information or have any 21215976Sjmallett * questions. 22215976Sjmallett * 23215976Sjmallett */ 24215976Sjmallett 25215976Sjmallett#ifndef SHARE_VM_INTERPRETER_BYTECODES_HPP 26215976Sjmallett#define SHARE_VM_INTERPRETER_BYTECODES_HPP 27215976Sjmallett 28215976Sjmallett#include "memory/allocation.hpp" 29232812Sjmallett#include "utilities/top.hpp" 30215976Sjmallett 31215976Sjmallett// Bytecodes specifies all bytecodes used in the VM and 32215976Sjmallett// provides utility functions to get bytecode attributes. 33215976Sjmallett 34215976Sjmallett// NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/interpreter/Bytecodes.java 35215976Sjmallettclass Bytecodes: AllStatic { 36215976Sjmallett public: 37215976Sjmallett enum Code { 38215976Sjmallett _illegal = -1, 39215976Sjmallett 40215976Sjmallett // Java bytecodes 41215976Sjmallett _nop = 0, // 0x00 42215976Sjmallett _aconst_null = 1, // 0x01 43215976Sjmallett _iconst_m1 = 2, // 0x02 44215976Sjmallett _iconst_0 = 3, // 0x03 45215976Sjmallett _iconst_1 = 4, // 0x04 46215976Sjmallett _iconst_2 = 5, // 0x05 47215976Sjmallett _iconst_3 = 6, // 0x06 48215976Sjmallett _iconst_4 = 7, // 0x07 49215976Sjmallett _iconst_5 = 8, // 0x08 50215976Sjmallett _lconst_0 = 9, // 0x09 51215976Sjmallett _lconst_1 = 10, // 0x0a 52232812Sjmallett _fconst_0 = 11, // 0x0b 53232812Sjmallett _fconst_1 = 12, // 0x0c 54215976Sjmallett _fconst_2 = 13, // 0x0d 55215976Sjmallett _dconst_0 = 14, // 0x0e 56215976Sjmallett _dconst_1 = 15, // 0x0f 57215976Sjmallett _bipush = 16, // 0x10 58215976Sjmallett _sipush = 17, // 0x11 59215976Sjmallett _ldc = 18, // 0x12 60215976Sjmallett _ldc_w = 19, // 0x13 61215976Sjmallett _ldc2_w = 20, // 0x14 62215976Sjmallett _iload = 21, // 0x15 63215976Sjmallett _lload = 22, // 0x16 64215976Sjmallett _fload = 23, // 0x17 65215976Sjmallett _dload = 24, // 0x18 66215976Sjmallett _aload = 25, // 0x19 67215976Sjmallett _iload_0 = 26, // 0x1a 68215976Sjmallett _iload_1 = 27, // 0x1b 69215976Sjmallett _iload_2 = 28, // 0x1c 70215976Sjmallett _iload_3 = 29, // 0x1d 71215976Sjmallett _lload_0 = 30, // 0x1e 72215976Sjmallett _lload_1 = 31, // 0x1f 73215976Sjmallett _lload_2 = 32, // 0x20 74215976Sjmallett _lload_3 = 33, // 0x21 75215976Sjmallett _fload_0 = 34, // 0x22 76215976Sjmallett _fload_1 = 35, // 0x23 77215976Sjmallett _fload_2 = 36, // 0x24 78215976Sjmallett _fload_3 = 37, // 0x25 79215976Sjmallett _dload_0 = 38, // 0x26 80215976Sjmallett _dload_1 = 39, // 0x27 81215976Sjmallett _dload_2 = 40, // 0x28 82215976Sjmallett _dload_3 = 41, // 0x29 83215976Sjmallett _aload_0 = 42, // 0x2a 84215976Sjmallett _aload_1 = 43, // 0x2b 85215976Sjmallett _aload_2 = 44, // 0x2c 86215976Sjmallett _aload_3 = 45, // 0x2d 87215976Sjmallett _iaload = 46, // 0x2e 88215976Sjmallett _laload = 47, // 0x2f 89215976Sjmallett _faload = 48, // 0x30 90215976Sjmallett _daload = 49, // 0x31 91215976Sjmallett _aaload = 50, // 0x32 92215976Sjmallett _baload = 51, // 0x33 93215976Sjmallett _caload = 52, // 0x34 94215976Sjmallett _saload = 53, // 0x35 95215976Sjmallett _istore = 54, // 0x36 96215976Sjmallett _lstore = 55, // 0x37 97215976Sjmallett _fstore = 56, // 0x38 98215976Sjmallett _dstore = 57, // 0x39 99215976Sjmallett _astore = 58, // 0x3a 100215976Sjmallett _istore_0 = 59, // 0x3b 101215976Sjmallett _istore_1 = 60, // 0x3c 102215976Sjmallett _istore_2 = 61, // 0x3d 103215976Sjmallett _istore_3 = 62, // 0x3e 104215976Sjmallett _lstore_0 = 63, // 0x3f 105215976Sjmallett _lstore_1 = 64, // 0x40 106215976Sjmallett _lstore_2 = 65, // 0x41 107215976Sjmallett _lstore_3 = 66, // 0x42 108215976Sjmallett _fstore_0 = 67, // 0x43 109215976Sjmallett _fstore_1 = 68, // 0x44 110215976Sjmallett _fstore_2 = 69, // 0x45 111215976Sjmallett _fstore_3 = 70, // 0x46 112215976Sjmallett _dstore_0 = 71, // 0x47 113215976Sjmallett _dstore_1 = 72, // 0x48 114215976Sjmallett _dstore_2 = 73, // 0x49 115215976Sjmallett _dstore_3 = 74, // 0x4a 116215976Sjmallett _astore_0 = 75, // 0x4b 117215976Sjmallett _astore_1 = 76, // 0x4c 118215976Sjmallett _astore_2 = 77, // 0x4d 119215976Sjmallett _astore_3 = 78, // 0x4e 120215976Sjmallett _iastore = 79, // 0x4f 121215976Sjmallett _lastore = 80, // 0x50 122215976Sjmallett _fastore = 81, // 0x51 123215976Sjmallett _dastore = 82, // 0x52 124215976Sjmallett _aastore = 83, // 0x53 125215976Sjmallett _bastore = 84, // 0x54 126215976Sjmallett _castore = 85, // 0x55 127215976Sjmallett _sastore = 86, // 0x56 128215976Sjmallett _pop = 87, // 0x57 129215976Sjmallett _pop2 = 88, // 0x58 130215976Sjmallett _dup = 89, // 0x59 131215976Sjmallett _dup_x1 = 90, // 0x5a 132215976Sjmallett _dup_x2 = 91, // 0x5b 133215976Sjmallett _dup2 = 92, // 0x5c 134215976Sjmallett _dup2_x1 = 93, // 0x5d 135215976Sjmallett _dup2_x2 = 94, // 0x5e 136215976Sjmallett _swap = 95, // 0x5f 137215976Sjmallett _iadd = 96, // 0x60 138215976Sjmallett _ladd = 97, // 0x61 139215976Sjmallett _fadd = 98, // 0x62 140215976Sjmallett _dadd = 99, // 0x63 141215976Sjmallett _isub = 100, // 0x64 142215976Sjmallett _lsub = 101, // 0x65 143215976Sjmallett _fsub = 102, // 0x66 144215976Sjmallett _dsub = 103, // 0x67 145215976Sjmallett _imul = 104, // 0x68 146215976Sjmallett _lmul = 105, // 0x69 147215976Sjmallett _fmul = 106, // 0x6a 148215976Sjmallett _dmul = 107, // 0x6b 149215976Sjmallett _idiv = 108, // 0x6c 150215976Sjmallett _ldiv = 109, // 0x6d 151215976Sjmallett _fdiv = 110, // 0x6e 152215976Sjmallett _ddiv = 111, // 0x6f 153215976Sjmallett _irem = 112, // 0x70 154215976Sjmallett _lrem = 113, // 0x71 155215976Sjmallett _frem = 114, // 0x72 156215976Sjmallett _drem = 115, // 0x73 157215976Sjmallett _ineg = 116, // 0x74 158215976Sjmallett _lneg = 117, // 0x75 159215976Sjmallett _fneg = 118, // 0x76 160215976Sjmallett _dneg = 119, // 0x77 161215976Sjmallett _ishl = 120, // 0x78 162215976Sjmallett _lshl = 121, // 0x79 163215976Sjmallett _ishr = 122, // 0x7a 164215976Sjmallett _lshr = 123, // 0x7b 165215976Sjmallett _iushr = 124, // 0x7c 166215976Sjmallett _lushr = 125, // 0x7d 167215976Sjmallett _iand = 126, // 0x7e 168215976Sjmallett _land = 127, // 0x7f 169215976Sjmallett _ior = 128, // 0x80 170215976Sjmallett _lor = 129, // 0x81 171215976Sjmallett _ixor = 130, // 0x82 172215976Sjmallett _lxor = 131, // 0x83 173215976Sjmallett _iinc = 132, // 0x84 174215976Sjmallett _i2l = 133, // 0x85 175215976Sjmallett _i2f = 134, // 0x86 176215976Sjmallett _i2d = 135, // 0x87 177215976Sjmallett _l2i = 136, // 0x88 178215976Sjmallett _l2f = 137, // 0x89 179215976Sjmallett _l2d = 138, // 0x8a 180215976Sjmallett _f2i = 139, // 0x8b 181215976Sjmallett _f2l = 140, // 0x8c 182215976Sjmallett _f2d = 141, // 0x8d 183215976Sjmallett _d2i = 142, // 0x8e 184215976Sjmallett _d2l = 143, // 0x8f 185215976Sjmallett _d2f = 144, // 0x90 186215976Sjmallett _i2b = 145, // 0x91 187215976Sjmallett _i2c = 146, // 0x92 188215976Sjmallett _i2s = 147, // 0x93 189215976Sjmallett _lcmp = 148, // 0x94 190215976Sjmallett _fcmpl = 149, // 0x95 191215976Sjmallett _fcmpg = 150, // 0x96 192215976Sjmallett _dcmpl = 151, // 0x97 193215976Sjmallett _dcmpg = 152, // 0x98 194232812Sjmallett _ifeq = 153, // 0x99 195215976Sjmallett _ifne = 154, // 0x9a 196232812Sjmallett _iflt = 155, // 0x9b 197232812Sjmallett _ifge = 156, // 0x9c 198215976Sjmallett _ifgt = 157, // 0x9d 199215976Sjmallett _ifle = 158, // 0x9e 200215976Sjmallett _if_icmpeq = 159, // 0x9f 201215976Sjmallett _if_icmpne = 160, // 0xa0 202215976Sjmallett _if_icmplt = 161, // 0xa1 203215976Sjmallett _if_icmpge = 162, // 0xa2 204215976Sjmallett _if_icmpgt = 163, // 0xa3 205215976Sjmallett _if_icmple = 164, // 0xa4 206215976Sjmallett _if_acmpeq = 165, // 0xa5 207215976Sjmallett _if_acmpne = 166, // 0xa6 208215976Sjmallett _goto = 167, // 0xa7 209215976Sjmallett _jsr = 168, // 0xa8 210215976Sjmallett _ret = 169, // 0xa9 211215976Sjmallett _tableswitch = 170, // 0xaa 212215976Sjmallett _lookupswitch = 171, // 0xab 213215976Sjmallett _ireturn = 172, // 0xac 214215976Sjmallett _lreturn = 173, // 0xad 215215976Sjmallett _freturn = 174, // 0xae 216215976Sjmallett _dreturn = 175, // 0xaf 217215976Sjmallett _areturn = 176, // 0xb0 218215976Sjmallett _return = 177, // 0xb1 219215976Sjmallett _getstatic = 178, // 0xb2 220215976Sjmallett _putstatic = 179, // 0xb3 221215976Sjmallett _getfield = 180, // 0xb4 222215976Sjmallett _putfield = 181, // 0xb5 223215976Sjmallett _invokevirtual = 182, // 0xb6 224215976Sjmallett _invokespecial = 183, // 0xb7 225215976Sjmallett _invokestatic = 184, // 0xb8 226215976Sjmallett _invokeinterface = 185, // 0xb9 227215976Sjmallett _invokedynamic = 186, // 0xba // if EnableInvokeDynamic 228215976Sjmallett _new = 187, // 0xbb 229215976Sjmallett _newarray = 188, // 0xbc 230215976Sjmallett _anewarray = 189, // 0xbd 231215976Sjmallett _arraylength = 190, // 0xbe 232215976Sjmallett _athrow = 191, // 0xbf 233215976Sjmallett _checkcast = 192, // 0xc0 234215976Sjmallett _instanceof = 193, // 0xc1 235215976Sjmallett _monitorenter = 194, // 0xc2 236215976Sjmallett _monitorexit = 195, // 0xc3 237215976Sjmallett _wide = 196, // 0xc4 238215976Sjmallett _multianewarray = 197, // 0xc5 239215976Sjmallett _ifnull = 198, // 0xc6 240215976Sjmallett _ifnonnull = 199, // 0xc7 241215976Sjmallett _goto_w = 200, // 0xc8 242215976Sjmallett _jsr_w = 201, // 0xc9 243215976Sjmallett _breakpoint = 202, // 0xca 244215976Sjmallett 245232812Sjmallett number_of_java_codes, 246215976Sjmallett 247232812Sjmallett // JVM bytecodes 248232812Sjmallett _fast_agetfield = number_of_java_codes, 249215976Sjmallett _fast_bgetfield , 250215976Sjmallett _fast_cgetfield , 251215976Sjmallett _fast_dgetfield , 252215976Sjmallett _fast_fgetfield , 253215976Sjmallett _fast_igetfield , 254215976Sjmallett _fast_lgetfield , 255215976Sjmallett _fast_sgetfield , 256215976Sjmallett 257215976Sjmallett _fast_aputfield , 258215976Sjmallett _fast_bputfield , 259215976Sjmallett _fast_cputfield , 260215976Sjmallett _fast_dputfield , 261215976Sjmallett _fast_fputfield , 262215976Sjmallett _fast_iputfield , 263215976Sjmallett _fast_lputfield , 264215976Sjmallett _fast_sputfield , 265215976Sjmallett 266215976Sjmallett _fast_aload_0 , 267215976Sjmallett _fast_iaccess_0 , 268215976Sjmallett _fast_aaccess_0 , 269215976Sjmallett _fast_faccess_0 , 270215976Sjmallett 271215976Sjmallett _fast_iload , 272215976Sjmallett _fast_iload2 , 273215976Sjmallett _fast_icaload , 274215976Sjmallett 275215976Sjmallett _fast_invokevfinal , 276215976Sjmallett _fast_linearswitch , 277215976Sjmallett _fast_binaryswitch , 278215976Sjmallett 279215976Sjmallett // special handling of oop constants: 280215976Sjmallett _fast_aldc , 281215976Sjmallett _fast_aldc_w , 282215976Sjmallett 283215976Sjmallett _return_register_finalizer , 284215976Sjmallett 285215976Sjmallett // special handling of signature-polymorphic methods: 286215976Sjmallett _invokehandle , 287215976Sjmallett 288215976Sjmallett _shouldnotreachhere, // For debugging 289215976Sjmallett 290232812Sjmallett // Platform specific JVM bytecodes 291215976Sjmallett#ifdef TARGET_ARCH_x86 292232812Sjmallett# include "bytecodes_x86.hpp" 293232812Sjmallett#endif 294215976Sjmallett#ifdef TARGET_ARCH_sparc 295215976Sjmallett# include "bytecodes_sparc.hpp" 296215976Sjmallett#endif 297215976Sjmallett#ifdef TARGET_ARCH_zero 298215976Sjmallett# include "bytecodes_zero.hpp" 299215976Sjmallett#endif 300215976Sjmallett#ifdef TARGET_ARCH_arm 301215976Sjmallett# include "bytecodes_arm.hpp" 302215976Sjmallett#endif 303215976Sjmallett#ifdef TARGET_ARCH_ppc 304215976Sjmallett# include "bytecodes_ppc.hpp" 305215976Sjmallett#endif 306215976Sjmallett 307215976Sjmallett 308215976Sjmallett number_of_codes 309215976Sjmallett }; 310215976Sjmallett 311215976Sjmallett // Flag bits derived from format strings, can_trap, can_rewrite, etc.: 312215976Sjmallett enum Flags { 313215976Sjmallett // semantic flags: 314215976Sjmallett _bc_can_trap = 1<<0, // bytecode execution can trap or block 315215976Sjmallett _bc_can_rewrite = 1<<1, // bytecode execution has an alternate form 316215976Sjmallett 317215976Sjmallett // format bits (determined only by the format string): 318215976Sjmallett _fmt_has_c = 1<<2, // constant, such as sipush "bcc" 319215976Sjmallett _fmt_has_j = 1<<3, // constant pool cache index, such as getfield "bjj" 320215976Sjmallett _fmt_has_k = 1<<4, // constant pool index, such as ldc "bk" 321215976Sjmallett _fmt_has_i = 1<<5, // local index, such as iload 322215976Sjmallett _fmt_has_o = 1<<6, // offset, such as ifeq 323215976Sjmallett _fmt_has_nbo = 1<<7, // contains native-order field(s) 324215976Sjmallett _fmt_has_u2 = 1<<8, // contains double-byte field(s) 325215976Sjmallett _fmt_has_u4 = 1<<9, // contains quad-byte field 326215976Sjmallett _fmt_not_variable = 1<<10, // not of variable length (simple or wide) 327215976Sjmallett _fmt_not_simple = 1<<11, // either wide or variable length 328215976Sjmallett _all_fmt_bits = (_fmt_not_simple*2 - _fmt_has_c), 329215976Sjmallett 330215976Sjmallett // Example derived format syndromes: 331215976Sjmallett _fmt_b = _fmt_not_variable, 332215976Sjmallett _fmt_bc = _fmt_b | _fmt_has_c, 333215976Sjmallett _fmt_bi = _fmt_b | _fmt_has_i, 334215976Sjmallett _fmt_bkk = _fmt_b | _fmt_has_k | _fmt_has_u2, 335232812Sjmallett _fmt_bJJ = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo, 336215976Sjmallett _fmt_bo2 = _fmt_b | _fmt_has_o | _fmt_has_u2, 337232812Sjmallett _fmt_bo4 = _fmt_b | _fmt_has_o | _fmt_has_u4 338232812Sjmallett }; 339215976Sjmallett 340215976Sjmallett private: 341215976Sjmallett static bool _is_initialized; 342215976Sjmallett static const char* _name [number_of_codes]; 343215976Sjmallett static BasicType _result_type [number_of_codes]; 344215976Sjmallett static s_char _depth [number_of_codes]; 345215976Sjmallett static u_char _lengths [number_of_codes]; 346215976Sjmallett static Code _java_code [number_of_codes]; 347215976Sjmallett static jchar _flags [(1<<BitsPerByte)*2]; // all second page for wide formats 348215976Sjmallett 349215976Sjmallett static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap); 350215976Sjmallett static void def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap, Code java_code); 351215976Sjmallett static void pd_initialize(); // platform specific initialization 352215976Sjmallett static Code pd_base_code_for(Code code); // platform specific base_code_for implementation 353215976Sjmallett 354215976Sjmallett // Verify that bcp points into method 355215976Sjmallett#ifdef ASSERT 356215976Sjmallett static bool check_method(const Method* method, address bcp); 357215976Sjmallett#endif 358215976Sjmallett static bool check_must_rewrite(Bytecodes::Code bc); 359215976Sjmallett 360215976Sjmallett public: 361215976Sjmallett // Conversion 362215976Sjmallett static void check (Code code) { assert(is_defined(code), err_msg("illegal code: %d", (int)code)); } 363215976Sjmallett static void wide_check (Code code) { assert(wide_is_defined(code), err_msg("illegal code: %d", (int)code)); } 364215976Sjmallett static Code cast (int code) { return (Code)code; } 365215976Sjmallett 366215976Sjmallett 367215976Sjmallett // Fetch a bytecode, hiding breakpoints as necessary. The method 368215976Sjmallett // argument is used for conversion of breakpoints into the original 369215976Sjmallett // bytecode. The CI uses these methods but guarantees that 370215976Sjmallett // breakpoints are hidden so the method argument should be passed as 371215976Sjmallett // NULL since in that case the bcp and Method* are unrelated 372215976Sjmallett // memory. 373215976Sjmallett static Code code_at(const Method* method, address bcp) { 374215976Sjmallett assert(method == NULL || check_method(method, bcp), "bcp must point into method"); 375215976Sjmallett Code code = cast(*bcp); 376215976Sjmallett assert(code != _breakpoint || method != NULL, "need Method* to decode breakpoint"); 377215976Sjmallett return (code != _breakpoint) ? code : non_breakpoint_code_at(method, bcp); 378215976Sjmallett } 379215976Sjmallett static Code java_code_at(const Method* method, address bcp) { 380215976Sjmallett return java_code(code_at(method, bcp)); 381232812Sjmallett } 382215976Sjmallett 383232812Sjmallett // Fetch a bytecode or a breakpoint: 384232812Sjmallett static Code code_or_bp_at(address bcp) { return (Code)cast(*bcp); } 385215976Sjmallett 386215976Sjmallett static Code code_at(Method* method, int bci); 387215976Sjmallett static bool is_active_breakpoint_at(address bcp) { return (Code)*bcp == _breakpoint; } 388215976Sjmallett 389215976Sjmallett // find a bytecode, behind a breakpoint if necessary: 390215976Sjmallett static Code non_breakpoint_code_at(const Method* method, address bcp); 391215976Sjmallett 392215976Sjmallett // Bytecode attributes 393215976Sjmallett static bool is_defined (int code) { return 0 <= code && code < number_of_codes && flags(code, false) != 0; } 394215976Sjmallett static bool wide_is_defined(int code) { return is_defined(code) && flags(code, true) != 0; } 395215976Sjmallett static const char* name (Code code) { check(code); return _name [code]; } 396215976Sjmallett static BasicType result_type (Code code) { check(code); return _result_type [code]; } 397215976Sjmallett static int depth (Code code) { check(code); return _depth [code]; } 398215976Sjmallett // Note: Length functions must return <=0 for invalid bytecodes. 399215976Sjmallett // Calling check(code) in length functions would throw an unwanted assert. 400215976Sjmallett static int length_for (Code code) { /*no check*/ return _lengths [code] & 0xF; } 401215976Sjmallett static int wide_length_for(Code code) { /*no check*/ return _lengths [code] >> 4; } 402215976Sjmallett static bool can_trap (Code code) { check(code); return has_all_flags(code, _bc_can_trap, false); } 403215976Sjmallett static Code java_code (Code code) { check(code); return _java_code [code]; } 404215976Sjmallett static bool can_rewrite (Code code) { check(code); return has_all_flags(code, _bc_can_rewrite, false); } 405215976Sjmallett static bool must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); } 406215976Sjmallett static bool native_byte_order(Code code) { check(code); return has_all_flags(code, _fmt_has_nbo, false); } 407215976Sjmallett static bool uses_cp_cache (Code code) { check(code); return has_all_flags(code, _fmt_has_j, false); } 408215976Sjmallett // if 'end' is provided, it indicates the end of the code buffer which 409215976Sjmallett // should not be read past when parsing. 410215976Sjmallett static int special_length_at(Bytecodes::Code code, address bcp, address end = NULL); 411215976Sjmallett static int special_length_at(Method* method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); } 412215976Sjmallett static int raw_special_length_at(address bcp, address end = NULL); 413215976Sjmallett static int length_for_code_at(Bytecodes::Code code, address bcp) { int l = length_for(code); return l > 0 ? l : special_length_at(code, bcp); } 414215976Sjmallett static int length_at (Method* method, address bcp) { return length_for_code_at(code_at(method, bcp), bcp); } 415215976Sjmallett static int java_length_at (Method* method, address bcp) { return length_for_code_at(java_code_at(method, bcp), bcp); } 416215976Sjmallett static bool is_java_code (Code code) { return 0 <= code && code < number_of_java_codes; } 417215976Sjmallett 418215976Sjmallett static bool is_aload (Code code) { return (code == _aload || code == _aload_0 || code == _aload_1 419215976Sjmallett || code == _aload_2 || code == _aload_3); } 420215976Sjmallett static bool is_astore (Code code) { return (code == _astore || code == _astore_0 || code == _astore_1 421215976Sjmallett || code == _astore_2 || code == _astore_3); } 422215976Sjmallett 423215976Sjmallett static bool is_zero_const (Code code) { return (code == _aconst_null || code == _iconst_0 424215976Sjmallett || code == _fconst_0 || code == _dconst_0); } 425215976Sjmallett static bool is_invoke (Code code) { return (_invokevirtual <= code && code <= _invokedynamic); } 426215976Sjmallett 427215976Sjmallett static bool has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; } 428215976Sjmallett 429215976Sjmallett static int compute_flags (const char* format, int more_flags = 0); // compute the flags 430215976Sjmallett static int flags (int code, bool is_wide) { 431215976Sjmallett assert(code == (u_char)code, "must be a byte"); 432215976Sjmallett return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)]; 433215976Sjmallett } 434215976Sjmallett static int format_bits (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; } 435215976Sjmallett static bool has_all_flags (Code code, int test_flags, bool is_wide) { 436215976Sjmallett return (flags(code, is_wide) & test_flags) == test_flags; 437215976Sjmallett } 438215976Sjmallett 439215976Sjmallett // Initialization 440215976Sjmallett static void initialize (); 441215976Sjmallett}; 442215976Sjmallett 443232812Sjmallett#endif // SHARE_VM_INTERPRETER_BYTECODES_HPP 444215976Sjmallett