opcode.java

java 到c的转换程序的原代码.对喜欢C程序而不懂JAVA程序的人很有帮助

//  Opcode.java -- definitions of Java bytecode operations

package toba.classfile;

import java.io.*;



public class Opcode {



    // instance variables
    public int code;            // The exact bytecode for this instruction
    public int length;		// instruction length (0 if variable)
    public int kind;		// kind (classification) of operation
    public int flags;		// flag bits
    public int var;		// variant for distinguishing similar ops
    public int pop;		// number of words popped
    public String push;		// number and types of words pushed
    public String name;		// mnemonic name
    public String opr;		// operator for use in generated code



// global opcode table

static Opcode table[];	



// instruction flags

public static final int I8   = 0x0001;	// instr has 8-bit signed arg
public static final int I16  = 0x0002;	// instr has 16-bit signed arg
public static final int I32  = 0x0004;	// instr has 16-bit signed arg
public static final int U8   = 0x0010;	// instr has 8-bit unsigned arg
public static final int U16  = 0x0020;	// instr has 16-bit unsigned arg
public static final int MORE = 0x0080;	// instr has further additional args

public static final int NFT  = 0x0100;	// no fallthrough to following instr
public static final int PC   = 0x0200;	// argument is PC relative
public static final int CTAB = 0x0800;	// argument indexes constant table

public static final int UNS  = 0x1000;	// unsigned variant of a shift
public static final int SWCH = 0x2000;	// switch instruction
public static final int INST = 0x4000;	// instanceof (including cast & aastore)
public static final int JSRI = 0x8000;	// JSR instruction flag



// newarray types

public static final int T_BOOLEAN	=  4;
public static final int T_CHAR		=  5;
public static final int T_FLOAT		=  6;
public static final int T_DOUBLE	=  7;
public static final int T_BYTE		=  8;
public static final int T_SHORT		=  9;
public static final int T_INT		= 10;
public static final int T_LONG		= 11;



// symbolic definitions of operations and classes of operations
// (these generally don't have to match Java bytecode codes, although many do)
// Constants are defined for wide classes of similar instructions, and 
// specific instances of those instructions are listed under the class.
// The translator can deal with simliar instructions all at once, while
// the interpreter deals with each individual instruction.


public static final int NOP  =  0; // Class of opcodes that do nothing in the 
public static final int POP  = 87; // translator, and their specific numbers
public static final int POP2 = 88;

public static final int CONST       =  1; // constant load class of ops
public static final int ACONST_NULL =  1; // and specific bytecode of the class
public static final int ICONST_M1   =  2;
public static final int ICONST_0    =  3;
public static final int ICONST_1    =  4;
public static final int ICONST_2    =  5;
public static final int ICONST_3    =  6;
public static final int ICONST_4    =  7;
public static final int ICONST_5    =  8;
public static final int LCONST_0    =  9;
public static final int LCONST_1    = 10;
public static final int FCONST_0    = 11;
public static final int FCONST_1    = 12;
public static final int FCONST_2    = 13;
public static final int DCONST_0    = 14;
public static final int DCONST_1    = 15;
public static final int BIPUSH      = 16;
public static final int SIPUSH      = 17;

public static final int LDC         = 18;	// ldc, ldc2, ldc2_w
public static final int LDC_W       = 19;      
public static final int LDC2_W      = 20;

public static final int LOAD        = 21;	// all non-array loads
public static final int ILOAD       = 21;      // and specific instances
public static final int LLOAD       = 22;
public static final int FLOAD       = 23;
public static final int DLOAD       = 24;
public static final int ALOAD       = 25;
public static final int ILOAD_0     = 26;
public static final int ILOAD_1     = 27;
public static final int ILOAD_2     = 28;
public static final int ILOAD_3     = 29;
public static final int LLOAD_0     = 30;
public static final int LLOAD_1     = 31;
public static final int LLOAD_2     = 32;
public static final int LLOAD_3     = 33;
public static final int FLOAD_0     = 34;
public static final int FLOAD_1     = 35;
public static final int FLOAD_2     = 36;
public static final int FLOAD_3     = 37;
public static final int DLOAD_0     = 38;
public static final int DLOAD_1     = 39;
public static final int DLOAD_2     = 40;
public static final int DLOAD_3     = 41;
public static final int ALOAD_0     = 42;
public static final int ALOAD_1     = 43;
public static final int ALOAD_2     = 44;
public static final int ALOAD_3     = 45;

public static final int STORE        = 54;	// all simple store operations
public static final int ISTORE       = 54;      // and specific instances
public static final int LSTORE       = 55;
public static final int FSTORE       = 56;
public static final int DSTORE       = 57;
public static final int ASTORE       = 58;
public static final int ISTORE_0     = 59;
public static final int ISTORE_1     = 60;
public static final int ISTORE_2     = 61;
public static final int ISTORE_3     = 62;
public static final int LSTORE_0     = 63;
public static final int LSTORE_1     = 64;
public static final int LSTORE_2     = 65;
public static final int LSTORE_3     = 66;
public static final int FSTORE_0     = 67;
public static final int FSTORE_1     = 68;
public static final int FSTORE_2     = 69;
public static final int FSTORE_3     = 70;
public static final int DSTORE_0     = 71;
public static final int DSTORE_1     = 72;
public static final int DSTORE_2     = 73;
public static final int DSTORE_3     = 74;
public static final int ASTORE_0     = 75;
public static final int ASTORE_1     = 76;
public static final int ASTORE_2     = 77;
public static final int ASTORE_3     = 78;

public static final int ARRAYLOAD   = 46;	// array load operations
public static final int IALOAD      = 46;      // and specific instances
public static final int LALOAD      = 47;
public static final int FALOAD      = 48;
public static final int DALOAD      = 49;
public static final int AALOAD      = 50;
public static final int BALOAD      = 51;
public static final int CALOAD      = 52;
public static final int SALOAD      = 53;

public static final int ARRAYSTORE  = 79;	// array store operation
public static final int IASTOR      = 79;      // and specific instances
public static final int LASTOR      = 80;
public static final int FASTOR      = 81;
public static final int DASTOR      = 82;
public static final int AASTOR      = 83;
public static final int BASTOR      = 84;
public static final int CASTOR      = 85;
public static final int SASTOR      = 86;

public static final int DUP   = 89;	// dup
public static final int DUPX1 = 90;	// dup_x1
public static final int DUPX2 = 91;	// dup_x2
public static final int DUP2  = 92;	// dup2
public static final int D2X1  = 93;	// dup2_x1
public static final int D2X2  = 94;	// dup2_x2
public static final int SWAP  = 95;	// swap

public static final int BINOP = 96;	// binary operators 
public static final int IADD  = 96;    // and their specific instances
public static final int LADD  = 97;
public static final int FADD  = 98;
public static final int DADD  = 99;
public static final int ISUB  =100;
public static final int LSUB  =101;
public static final int FSUB  =102;
public static final int DSUB  =103;
public static final int IMUL  =104;
public static final int LMUL  =105;
public static final int FMUL  =106;
public static final int DMUL  =107;
public static final int FDIV  =110;
public static final int DDIV  =111;
public static final int IAND  = 126;
public static final int LAND  = 127;
public static final int IOR   = 128;
public static final int LOR   = 129;
public static final int IXOR  = 130;
public static final int LXOR  = 131;

public static final int IINC = 132;	// iinc (all by itself)

public static final int DIVOP = 108;	// division ops that throw division by
public static final int IDIV  = 108;    // zero exceptions
public static final int LDIV  = 109;   
public static final int IREM  = 112;   
public static final int LREM  = 113;   

public static final int FREM = 114;	// float (or double) remainder ops
public static final int DREM = 115;	// and the specific double variant

public static final int SHIFT = 120;	// shift operators
public static final int ISHL =  120;   // and the specific instances
public static final int LSHL =  121;
public static final int ISHR =  122;
public static final int LSHR =  123;
public static final int IUSHR = 124;
public static final int LUSHR = 125;

public static final int UNOP =    116;	// unary operators 
public static final int INEG =    116; // and the specific instances of that class
public static final int LNEG =	   117;
public static final int FNEG =	   118;
public static final int DNEG =	   119;
public static final int I2L =	   133;
public static final int I2F =	   134;
public static final int I2D =	   135;
public static final int L2I =	   136;
public static final int L2F =	   137;
public static final int L2D =	   138;
public static final int F2D =	   141;
public static final int D2F =	   144;
public static final int INT2BYTE =   145;
public static final int INT2CHAR =   146;
public static final int INT2SHORT =  147;

public static final int FTOI =  139;	// f2l, d2l, f2i, d2i conversions
public static final int F2I  =  139;   // and specific instances
public static final int F2L  =  140;
public static final int D2I  =  142;
public static final int D2L  =  143;

public static final int CMP   = 148;	// compares without branching
public static final int LCMP  = 148;
public static final int FCMPL = 149;
public static final int FCMPG = 150;
public static final int DCMPL = 151;
public static final int DCMPG = 152;

public static final int IFZRO =  153;	// compare to zero and branches
public static final int IFEQ   = 153;
public static final int IFNE   = 154;
public static final int IFLT   = 155;
public static final int IFGE   = 156;
public static final int IFGT   = 157;
public static final int IFLE   = 158;
public static final int IFNULL = 198;
public static final int IFNONNULL = 199;

public static final int IFCMP = 159;	// compare and branches
public static final int IF_ICMPEQ = 159;
public static final int IF_ICMPNE = 160;
public static final int IF_ICMPLT = 161;
public static final int IF_ICMPGE = 162;
public static final int IF_ICMPGT = 163;
public static final int IF_ICMPLE = 164;
public static final int IF_ACMPEQ = 165;
public static final int IF_ACMPNE = 166;

public static final int GOTO   = 167;	// goto, goto_w
public static final int GOTO_W = 200;

public static final int JSR   = 168;	// jsr, jsr_w
public static final int JSR_W = 201;

public static final int RET   = 169;	// ret, ret_w
public static final int TBLSW = 170;	// tableswitch
public static final int LKPSW = 171;	// lookupswitch

public static final int RETV    = 172;	// return value (iret, aret, etc.)
public static final int IRETURN = 172;
public static final int LRETURN = 173;
public static final int FRETURN = 174;
public static final int DRETURN = 175;
public static final int ARETURN = 176;

public static final int RETRN   = 177;	// return, no value

public static final int GETS = 178;	// getstatic
public static final int PUTS = 179;	// putstatic
public static final int GETF = 180;	// getfield