aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  *
aoqi@0:  */
aoqi@0: 
aoqi@1: /*
aoqi@1:  * This file has been modified by Loongson Technology in 2015. These
aoqi@1:  * modifications are Copyright (c) 2015 Loongson Technology, and are made
aoqi@1:  * available on the same license terms set forth above.
aoqi@1:  */
aoqi@1: 
aoqi@0: #ifndef SHARE_VM_INTERPRETER_BYTECODES_HPP
aoqi@0: #define SHARE_VM_INTERPRETER_BYTECODES_HPP
aoqi@0: 
aoqi@0: #include "memory/allocation.hpp"
aoqi@0: #include "utilities/top.hpp"
aoqi@0: 
aoqi@0: // Bytecodes specifies all bytecodes used in the VM and
aoqi@0: // provides utility functions to get bytecode attributes.
aoqi@0: 
aoqi@0: // NOTE: replicated in SA in vm/agent/sun/jvm/hotspot/interpreter/Bytecodes.java
aoqi@0: class Bytecodes: AllStatic {
aoqi@0:  public:
aoqi@0:   enum Code {
aoqi@0:     _illegal              =  -1,
aoqi@0: 
aoqi@0:     // Java bytecodes
aoqi@0:     _nop                  =   0, // 0x00
aoqi@0:     _aconst_null          =   1, // 0x01
aoqi@0:     _iconst_m1            =   2, // 0x02
aoqi@0:     _iconst_0             =   3, // 0x03
aoqi@0:     _iconst_1             =   4, // 0x04
aoqi@0:     _iconst_2             =   5, // 0x05
aoqi@0:     _iconst_3             =   6, // 0x06
aoqi@0:     _iconst_4             =   7, // 0x07
aoqi@0:     _iconst_5             =   8, // 0x08
aoqi@0:     _lconst_0             =   9, // 0x09
aoqi@0:     _lconst_1             =  10, // 0x0a
aoqi@0:     _fconst_0             =  11, // 0x0b
aoqi@0:     _fconst_1             =  12, // 0x0c
aoqi@0:     _fconst_2             =  13, // 0x0d
aoqi@0:     _dconst_0             =  14, // 0x0e
aoqi@0:     _dconst_1             =  15, // 0x0f
aoqi@0:     _bipush               =  16, // 0x10
aoqi@0:     _sipush               =  17, // 0x11
aoqi@0:     _ldc                  =  18, // 0x12
aoqi@0:     _ldc_w                =  19, // 0x13
aoqi@0:     _ldc2_w               =  20, // 0x14
aoqi@0:     _iload                =  21, // 0x15
aoqi@0:     _lload                =  22, // 0x16
aoqi@0:     _fload                =  23, // 0x17
aoqi@0:     _dload                =  24, // 0x18
aoqi@0:     _aload                =  25, // 0x19
aoqi@0:     _iload_0              =  26, // 0x1a
aoqi@0:     _iload_1              =  27, // 0x1b
aoqi@0:     _iload_2              =  28, // 0x1c
aoqi@0:     _iload_3              =  29, // 0x1d
aoqi@0:     _lload_0              =  30, // 0x1e
aoqi@0:     _lload_1              =  31, // 0x1f
aoqi@0:     _lload_2              =  32, // 0x20
aoqi@0:     _lload_3              =  33, // 0x21
aoqi@0:     _fload_0              =  34, // 0x22
aoqi@0:     _fload_1              =  35, // 0x23
aoqi@0:     _fload_2              =  36, // 0x24
aoqi@0:     _fload_3              =  37, // 0x25
aoqi@0:     _dload_0              =  38, // 0x26
aoqi@0:     _dload_1              =  39, // 0x27
aoqi@0:     _dload_2              =  40, // 0x28
aoqi@0:     _dload_3              =  41, // 0x29
aoqi@0:     _aload_0              =  42, // 0x2a
aoqi@0:     _aload_1              =  43, // 0x2b
aoqi@0:     _aload_2              =  44, // 0x2c
aoqi@0:     _aload_3              =  45, // 0x2d
aoqi@0:     _iaload               =  46, // 0x2e
aoqi@0:     _laload               =  47, // 0x2f
aoqi@0:     _faload               =  48, // 0x30
aoqi@0:     _daload               =  49, // 0x31
aoqi@0:     _aaload               =  50, // 0x32
aoqi@0:     _baload               =  51, // 0x33
aoqi@0:     _caload               =  52, // 0x34
aoqi@0:     _saload               =  53, // 0x35
aoqi@0:     _istore               =  54, // 0x36
aoqi@0:     _lstore               =  55, // 0x37
aoqi@0:     _fstore               =  56, // 0x38
aoqi@0:     _dstore               =  57, // 0x39
aoqi@0:     _astore               =  58, // 0x3a
aoqi@0:     _istore_0             =  59, // 0x3b
aoqi@0:     _istore_1             =  60, // 0x3c
aoqi@0:     _istore_2             =  61, // 0x3d
aoqi@0:     _istore_3             =  62, // 0x3e
aoqi@0:     _lstore_0             =  63, // 0x3f
aoqi@0:     _lstore_1             =  64, // 0x40
aoqi@0:     _lstore_2             =  65, // 0x41
aoqi@0:     _lstore_3             =  66, // 0x42
aoqi@0:     _fstore_0             =  67, // 0x43
aoqi@0:     _fstore_1             =  68, // 0x44
aoqi@0:     _fstore_2             =  69, // 0x45
aoqi@0:     _fstore_3             =  70, // 0x46
aoqi@0:     _dstore_0             =  71, // 0x47
aoqi@0:     _dstore_1             =  72, // 0x48
aoqi@0:     _dstore_2             =  73, // 0x49
aoqi@0:     _dstore_3             =  74, // 0x4a
aoqi@0:     _astore_0             =  75, // 0x4b
aoqi@0:     _astore_1             =  76, // 0x4c
aoqi@0:     _astore_2             =  77, // 0x4d
aoqi@0:     _astore_3             =  78, // 0x4e
aoqi@0:     _iastore              =  79, // 0x4f
aoqi@0:     _lastore              =  80, // 0x50
aoqi@0:     _fastore              =  81, // 0x51
aoqi@0:     _dastore              =  82, // 0x52
aoqi@0:     _aastore              =  83, // 0x53
aoqi@0:     _bastore              =  84, // 0x54
aoqi@0:     _castore              =  85, // 0x55
aoqi@0:     _sastore              =  86, // 0x56
aoqi@0:     _pop                  =  87, // 0x57
aoqi@0:     _pop2                 =  88, // 0x58
aoqi@0:     _dup                  =  89, // 0x59
aoqi@0:     _dup_x1               =  90, // 0x5a
aoqi@0:     _dup_x2               =  91, // 0x5b
aoqi@0:     _dup2                 =  92, // 0x5c
aoqi@0:     _dup2_x1              =  93, // 0x5d
aoqi@0:     _dup2_x2              =  94, // 0x5e
aoqi@0:     _swap                 =  95, // 0x5f
aoqi@0:     _iadd                 =  96, // 0x60
aoqi@0:     _ladd                 =  97, // 0x61
aoqi@0:     _fadd                 =  98, // 0x62
aoqi@0:     _dadd                 =  99, // 0x63
aoqi@0:     _isub                 = 100, // 0x64
aoqi@0:     _lsub                 = 101, // 0x65
aoqi@0:     _fsub                 = 102, // 0x66
aoqi@0:     _dsub                 = 103, // 0x67
aoqi@0:     _imul                 = 104, // 0x68
aoqi@0:     _lmul                 = 105, // 0x69
aoqi@0:     _fmul                 = 106, // 0x6a
aoqi@0:     _dmul                 = 107, // 0x6b
aoqi@0:     _idiv                 = 108, // 0x6c
aoqi@0:     _ldiv                 = 109, // 0x6d
aoqi@0:     _fdiv                 = 110, // 0x6e
aoqi@0:     _ddiv                 = 111, // 0x6f
aoqi@0:     _irem                 = 112, // 0x70
aoqi@0:     _lrem                 = 113, // 0x71
aoqi@0:     _frem                 = 114, // 0x72
aoqi@0:     _drem                 = 115, // 0x73
aoqi@0:     _ineg                 = 116, // 0x74
aoqi@0:     _lneg                 = 117, // 0x75
aoqi@0:     _fneg                 = 118, // 0x76
aoqi@0:     _dneg                 = 119, // 0x77
aoqi@0:     _ishl                 = 120, // 0x78
aoqi@0:     _lshl                 = 121, // 0x79
aoqi@0:     _ishr                 = 122, // 0x7a
aoqi@0:     _lshr                 = 123, // 0x7b
aoqi@0:     _iushr                = 124, // 0x7c
aoqi@0:     _lushr                = 125, // 0x7d
aoqi@0:     _iand                 = 126, // 0x7e
aoqi@0:     _land                 = 127, // 0x7f
aoqi@0:     _ior                  = 128, // 0x80
aoqi@0:     _lor                  = 129, // 0x81
aoqi@0:     _ixor                 = 130, // 0x82
aoqi@0:     _lxor                 = 131, // 0x83
aoqi@0:     _iinc                 = 132, // 0x84
aoqi@0:     _i2l                  = 133, // 0x85
aoqi@0:     _i2f                  = 134, // 0x86
aoqi@0:     _i2d                  = 135, // 0x87
aoqi@0:     _l2i                  = 136, // 0x88
aoqi@0:     _l2f                  = 137, // 0x89
aoqi@0:     _l2d                  = 138, // 0x8a
aoqi@0:     _f2i                  = 139, // 0x8b
aoqi@0:     _f2l                  = 140, // 0x8c
aoqi@0:     _f2d                  = 141, // 0x8d
aoqi@0:     _d2i                  = 142, // 0x8e
aoqi@0:     _d2l                  = 143, // 0x8f
aoqi@0:     _d2f                  = 144, // 0x90
aoqi@0:     _i2b                  = 145, // 0x91
aoqi@0:     _i2c                  = 146, // 0x92
aoqi@0:     _i2s                  = 147, // 0x93
aoqi@0:     _lcmp                 = 148, // 0x94
aoqi@0:     _fcmpl                = 149, // 0x95
aoqi@0:     _fcmpg                = 150, // 0x96
aoqi@0:     _dcmpl                = 151, // 0x97
aoqi@0:     _dcmpg                = 152, // 0x98
aoqi@0:     _ifeq                 = 153, // 0x99
aoqi@0:     _ifne                 = 154, // 0x9a
aoqi@0:     _iflt                 = 155, // 0x9b
aoqi@0:     _ifge                 = 156, // 0x9c
aoqi@0:     _ifgt                 = 157, // 0x9d
aoqi@0:     _ifle                 = 158, // 0x9e
aoqi@0:     _if_icmpeq            = 159, // 0x9f
aoqi@0:     _if_icmpne            = 160, // 0xa0
aoqi@0:     _if_icmplt            = 161, // 0xa1
aoqi@0:     _if_icmpge            = 162, // 0xa2
aoqi@0:     _if_icmpgt            = 163, // 0xa3
aoqi@0:     _if_icmple            = 164, // 0xa4
aoqi@0:     _if_acmpeq            = 165, // 0xa5
aoqi@0:     _if_acmpne            = 166, // 0xa6
aoqi@0:     _goto                 = 167, // 0xa7
aoqi@0:     _jsr                  = 168, // 0xa8
aoqi@0:     _ret                  = 169, // 0xa9
aoqi@0:     _tableswitch          = 170, // 0xaa
aoqi@0:     _lookupswitch         = 171, // 0xab
aoqi@0:     _ireturn              = 172, // 0xac
aoqi@0:     _lreturn              = 173, // 0xad
aoqi@0:     _freturn              = 174, // 0xae
aoqi@0:     _dreturn              = 175, // 0xaf
aoqi@0:     _areturn              = 176, // 0xb0
aoqi@0:     _return               = 177, // 0xb1
aoqi@0:     _getstatic            = 178, // 0xb2
aoqi@0:     _putstatic            = 179, // 0xb3
aoqi@0:     _getfield             = 180, // 0xb4
aoqi@0:     _putfield             = 181, // 0xb5
aoqi@0:     _invokevirtual        = 182, // 0xb6
aoqi@0:     _invokespecial        = 183, // 0xb7
aoqi@0:     _invokestatic         = 184, // 0xb8
aoqi@0:     _invokeinterface      = 185, // 0xb9
aoqi@0:     _invokedynamic        = 186, // 0xba     // if EnableInvokeDynamic
aoqi@0:     _new                  = 187, // 0xbb
aoqi@0:     _newarray             = 188, // 0xbc
aoqi@0:     _anewarray            = 189, // 0xbd
aoqi@0:     _arraylength          = 190, // 0xbe
aoqi@0:     _athrow               = 191, // 0xbf
aoqi@0:     _checkcast            = 192, // 0xc0
aoqi@0:     _instanceof           = 193, // 0xc1
aoqi@0:     _monitorenter         = 194, // 0xc2
aoqi@0:     _monitorexit          = 195, // 0xc3
aoqi@0:     _wide                 = 196, // 0xc4
aoqi@0:     _multianewarray       = 197, // 0xc5
aoqi@0:     _ifnull               = 198, // 0xc6
aoqi@0:     _ifnonnull            = 199, // 0xc7
aoqi@0:     _goto_w               = 200, // 0xc8
aoqi@0:     _jsr_w                = 201, // 0xc9
aoqi@0:     _breakpoint           = 202, // 0xca
aoqi@0: 
aoqi@0:     number_of_java_codes,
aoqi@0: 
aoqi@0:     // JVM bytecodes
aoqi@0:     _fast_agetfield       = number_of_java_codes,
aoqi@0:     _fast_bgetfield       ,
aoqi@0:     _fast_cgetfield       ,
aoqi@0:     _fast_dgetfield       ,
aoqi@0:     _fast_fgetfield       ,
aoqi@0:     _fast_igetfield       ,
aoqi@0:     _fast_lgetfield       ,
aoqi@0:     _fast_sgetfield       ,
aoqi@0: 
aoqi@0:     _fast_aputfield       ,
aoqi@0:     _fast_bputfield       ,
aoqi@0:     _fast_cputfield       ,
aoqi@0:     _fast_dputfield       ,
aoqi@0:     _fast_fputfield       ,
aoqi@0:     _fast_iputfield       ,
aoqi@0:     _fast_lputfield       ,
aoqi@0:     _fast_sputfield       ,
aoqi@0: 
aoqi@0:     _fast_aload_0         ,
aoqi@0:     _fast_iaccess_0       ,
aoqi@0:     _fast_aaccess_0       ,
aoqi@0:     _fast_faccess_0       ,
aoqi@0: 
aoqi@0:     _fast_iload           ,
aoqi@0:     _fast_iload2          ,
aoqi@0:     _fast_icaload         ,
aoqi@0: 
aoqi@0:     _fast_invokevfinal    ,
aoqi@0:     _fast_linearswitch    ,
aoqi@0:     _fast_binaryswitch    ,
aoqi@0: 
aoqi@0:     // special handling of oop constants:
aoqi@0:     _fast_aldc            ,
aoqi@0:     _fast_aldc_w          ,
aoqi@0: 
aoqi@0:     _return_register_finalizer    ,
aoqi@0: 
aoqi@0:     // special handling of signature-polymorphic methods:
aoqi@0:     _invokehandle         ,
aoqi@0: 
aoqi@0:     _shouldnotreachhere,      // For debugging
aoqi@0: 
aoqi@0:     // Platform specific JVM bytecodes
aoqi@0: #ifdef TARGET_ARCH_x86
aoqi@0: # include "bytecodes_x86.hpp"
aoqi@0: #endif
aoqi@1: #ifdef TARGET_ARCH_mips
aoqi@1: # include "bytecodes_mips.hpp"
aoqi@1: #endif
aoqi@0: #ifdef TARGET_ARCH_sparc
aoqi@0: # include "bytecodes_sparc.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_zero
aoqi@0: # include "bytecodes_zero.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_arm
aoqi@0: # include "bytecodes_arm.hpp"
aoqi@0: #endif
aoqi@0: #ifdef TARGET_ARCH_ppc
aoqi@0: # include "bytecodes_ppc.hpp"
aoqi@0: #endif
aoqi@0: 
aoqi@0: 
aoqi@0:     number_of_codes
aoqi@0:   };
aoqi@0: 
aoqi@0:   // Flag bits derived from format strings, can_trap, can_rewrite, etc.:
aoqi@0:   enum Flags {
aoqi@0:     // semantic flags:
aoqi@0:     _bc_can_trap      = 1<<0,     // bytecode execution can trap or block
aoqi@0:     _bc_can_rewrite   = 1<<1,     // bytecode execution has an alternate form
aoqi@0: 
aoqi@0:     // format bits (determined only by the format string):
aoqi@0:     _fmt_has_c        = 1<<2,     // constant, such as sipush "bcc"
aoqi@0:     _fmt_has_j        = 1<<3,     // constant pool cache index, such as getfield "bjj"
aoqi@0:     _fmt_has_k        = 1<<4,     // constant pool index, such as ldc "bk"
aoqi@0:     _fmt_has_i        = 1<<5,     // local index, such as iload
aoqi@0:     _fmt_has_o        = 1<<6,     // offset, such as ifeq
aoqi@0:     _fmt_has_nbo      = 1<<7,     // contains native-order field(s)
aoqi@0:     _fmt_has_u2       = 1<<8,     // contains double-byte field(s)
aoqi@0:     _fmt_has_u4       = 1<<9,     // contains quad-byte field
aoqi@0:     _fmt_not_variable = 1<<10,    // not of variable length (simple or wide)
aoqi@0:     _fmt_not_simple   = 1<<11,    // either wide or variable length
aoqi@0:     _all_fmt_bits     = (_fmt_not_simple*2 - _fmt_has_c),
aoqi@0: 
aoqi@0:     // Example derived format syndromes:
aoqi@0:     _fmt_b      = _fmt_not_variable,
aoqi@0:     _fmt_bc     = _fmt_b | _fmt_has_c,
aoqi@0:     _fmt_bi     = _fmt_b | _fmt_has_i,
aoqi@0:     _fmt_bkk    = _fmt_b | _fmt_has_k | _fmt_has_u2,
aoqi@0:     _fmt_bJJ    = _fmt_b | _fmt_has_j | _fmt_has_u2 | _fmt_has_nbo,
aoqi@0:     _fmt_bo2    = _fmt_b | _fmt_has_o | _fmt_has_u2,
aoqi@0:     _fmt_bo4    = _fmt_b | _fmt_has_o | _fmt_has_u4
aoqi@0:   };
aoqi@0: 
aoqi@0:  private:
aoqi@0:   static bool        _is_initialized;
aoqi@0:   static const char* _name          [number_of_codes];
aoqi@0:   static BasicType   _result_type   [number_of_codes];
aoqi@0:   static s_char      _depth         [number_of_codes];
aoqi@0:   static u_char      _lengths       [number_of_codes];
aoqi@0:   static Code        _java_code     [number_of_codes];
aoqi@0:   static jchar       _flags         [(1<<BitsPerByte)*2]; // all second page for wide formats
aoqi@0: 
aoqi@0:   static void        def(Code code, const char* name, const char* format, const char* wide_format, BasicType result_type, int depth, bool can_trap);
aoqi@0:   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);
aoqi@0:   static void        pd_initialize();              // platform specific initialization
aoqi@0:   static Code        pd_base_code_for(Code code);  // platform specific base_code_for implementation
aoqi@0: 
aoqi@0:   // Verify that bcp points into method
aoqi@0: #ifdef ASSERT
aoqi@0:   static bool        check_method(const Method* method, address bcp);
aoqi@0: #endif
aoqi@0:   static bool check_must_rewrite(Bytecodes::Code bc);
aoqi@0: 
aoqi@0:  public:
aoqi@0:   // Conversion
aoqi@0:   static void        check          (Code code)    { assert(is_defined(code),      err_msg("illegal code: %d", (int)code)); }
aoqi@0:   static void        wide_check     (Code code)    { assert(wide_is_defined(code), err_msg("illegal code: %d", (int)code)); }
aoqi@0:   static Code        cast           (int  code)    { return (Code)code; }
aoqi@0: 
aoqi@0: 
aoqi@0:   // Fetch a bytecode, hiding breakpoints as necessary.  The method
aoqi@0:   // argument is used for conversion of breakpoints into the original
aoqi@0:   // bytecode.  The CI uses these methods but guarantees that
aoqi@0:   // breakpoints are hidden so the method argument should be passed as
aoqi@0:   // NULL since in that case the bcp and Method* are unrelated
aoqi@0:   // memory.
aoqi@0:   static Code       code_at(const Method* method, address bcp) {
aoqi@0:     assert(method == NULL || check_method(method, bcp), "bcp must point into method");
aoqi@0:     Code code = cast(*bcp);
aoqi@0:     assert(code != _breakpoint || method != NULL, "need Method* to decode breakpoint");
aoqi@0:     return (code != _breakpoint) ? code : non_breakpoint_code_at(method, bcp);
aoqi@0:   }
aoqi@0:   static Code       java_code_at(const Method* method, address bcp) {
aoqi@0:     return java_code(code_at(method, bcp));
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Fetch a bytecode or a breakpoint:
aoqi@0:   static Code       code_or_bp_at(address bcp)    { return (Code)cast(*bcp); }
aoqi@0: 
aoqi@0:   static Code       code_at(Method* method, int bci);
aoqi@0:   static bool       is_active_breakpoint_at(address bcp) { return (Code)*bcp == _breakpoint; }
aoqi@0: 
aoqi@0:   // find a bytecode, behind a breakpoint if necessary:
aoqi@0:   static Code       non_breakpoint_code_at(const Method* method, address bcp);
aoqi@0: 
aoqi@0:   // Bytecode attributes
aoqi@0:   static bool        is_defined     (int  code)    { return 0 <= code && code < number_of_codes && flags(code, false) != 0; }
aoqi@0:   static bool        wide_is_defined(int  code)    { return is_defined(code) && flags(code, true) != 0; }
aoqi@0:   static const char* name           (Code code)    { check(code);      return _name          [code]; }
aoqi@0:   static BasicType   result_type    (Code code)    { check(code);      return _result_type   [code]; }
aoqi@0:   static int         depth          (Code code)    { check(code);      return _depth         [code]; }
aoqi@0:   // Note: Length functions must return <=0 for invalid bytecodes.
aoqi@0:   // Calling check(code) in length functions would throw an unwanted assert.
aoqi@0:   static int         length_for     (Code code)    { /*no check*/      return _lengths       [code] & 0xF; }
aoqi@0:   static int         wide_length_for(Code code)    { /*no check*/      return _lengths       [code] >> 4; }
aoqi@0:   static bool        can_trap       (Code code)    { check(code);      return has_all_flags(code, _bc_can_trap, false); }
aoqi@0:   static Code        java_code      (Code code)    { check(code);      return _java_code     [code]; }
aoqi@0:   static bool        can_rewrite    (Code code)    { check(code);      return has_all_flags(code, _bc_can_rewrite, false); }
aoqi@0:   static bool        must_rewrite(Bytecodes::Code code) { return can_rewrite(code) && check_must_rewrite(code); }
aoqi@0:   static bool        native_byte_order(Code code)  { check(code);      return has_all_flags(code, _fmt_has_nbo, false); }
aoqi@0:   static bool        uses_cp_cache  (Code code)    { check(code);      return has_all_flags(code, _fmt_has_j, false); }
aoqi@0:   // if 'end' is provided, it indicates the end of the code buffer which
aoqi@0:   // should not be read past when parsing.
aoqi@0:   static int         special_length_at(Bytecodes::Code code, address bcp, address end = NULL);
aoqi@0:   static int         special_length_at(Method* method, address bcp, address end = NULL) { return special_length_at(code_at(method, bcp), bcp, end); }
aoqi@0:   static int         raw_special_length_at(address bcp, address end = NULL);
aoqi@0:   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); }
aoqi@0:   static int         length_at      (Method* method, address bcp)  { return length_for_code_at(code_at(method, bcp), bcp); }
aoqi@0:   static int         java_length_at (Method* method, address bcp)  { return length_for_code_at(java_code_at(method, bcp), bcp); }
aoqi@0:   static bool        is_java_code   (Code code)    { return 0 <= code && code < number_of_java_codes; }
aoqi@0: 
aoqi@0:   static bool        is_aload       (Code code)    { return (code == _aload  || code == _aload_0  || code == _aload_1
aoqi@0:                                                                              || code == _aload_2  || code == _aload_3); }
aoqi@0:   static bool        is_astore      (Code code)    { return (code == _astore || code == _astore_0 || code == _astore_1
aoqi@0:                                                                              || code == _astore_2 || code == _astore_3); }
aoqi@0: 
aoqi@0:   static bool        is_zero_const  (Code code)    { return (code == _aconst_null || code == _iconst_0
aoqi@0:                                                            || code == _fconst_0 || code == _dconst_0); }
aoqi@0:   static bool        is_invoke      (Code code)    { return (_invokevirtual <= code && code <= _invokedynamic); }
aoqi@0:   static bool        has_receiver   (Code code)    { assert(is_invoke(code), "");  return code == _invokevirtual ||
aoqi@0:                                                                                           code == _invokespecial ||
aoqi@0:                                                                                           code == _invokeinterface; }
aoqi@0:   static bool        has_optional_appendix(Code code) { return code == _invokedynamic || code == _invokehandle; }
aoqi@0: 
aoqi@0:   static int         compute_flags  (const char* format, int more_flags = 0);  // compute the flags
aoqi@0:   static int         flags          (int code, bool is_wide) {
aoqi@0:     assert(code == (u_char)code, "must be a byte");
aoqi@0:     return _flags[code + (is_wide ? (1<<BitsPerByte) : 0)];
aoqi@0:   }
aoqi@0:   static int         format_bits    (Code code, bool is_wide) { return flags(code, is_wide) & _all_fmt_bits; }
aoqi@0:   static bool        has_all_flags  (Code code, int test_flags, bool is_wide) {
aoqi@0:     return (flags(code, is_wide) & test_flags) == test_flags;
aoqi@0:   }
aoqi@0: 
aoqi@0:   // Initialization
aoqi@0:   static void        initialize     ();
aoqi@0: };
aoqi@0: 
aoqi@0: #endif // SHARE_VM_INTERPRETER_BYTECODES_HPP