mirror of
https://github.com/Leonmmcoset/CMLeonOS.git
synced 2026-03-03 15:30:27 +00:00
1284 lines
30 KiB
C#
1284 lines
30 KiB
C#
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using NotImplementedException = System.NotImplementedException;
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namespace UniLua
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{
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using InstructionPtr = Pointer<Instruction>;
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using Math = System.Math;
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using Exception = System.Exception;
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public struct Instruction
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{
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public uint Value;
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public Instruction( uint val )
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{
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Value = val;
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}
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public static explicit operator Instruction( uint val )
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{
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return new Instruction(val);
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}
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public static explicit operator uint( Instruction i )
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{
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return i.Value;
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}
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public override string ToString()
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{
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var op = GET_OPCODE();
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var a = GETARG_A();
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var b = GETARG_B();
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var c = GETARG_C();
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var ax = GETARG_Ax();
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var bx = GETARG_Bx();
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var sbx = GETARG_sBx();
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var mode = OpCodeInfo.GetMode( op );
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switch( mode.OpMode )
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{
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case OpMode.iABC:
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{
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string ret = string.Format( "{0,-9} {1}"
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, op
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, a );
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if( mode.BMode != OpArgMask.OpArgN )
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ret += " " + (ISK(b) ? MYK(INDEXK(b)) : b);
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if( mode.CMode != OpArgMask.OpArgN )
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ret += " " + (ISK(c) ? MYK(INDEXK(c)) : c);
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return ret;
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}
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case OpMode.iABx:
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{
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string ret = string.Format( "{0,-9} {1}"
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, op
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, a );
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if( mode.BMode == OpArgMask.OpArgK )
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ret += " " + MYK(bx);
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else if( mode.BMode == OpArgMask.OpArgU )
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ret += " " + bx;
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return ret;
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}
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case OpMode.iAsBx:
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{
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return string.Format( "{0,-9} {1} {2}"
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, op
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, a
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, sbx );
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}
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case OpMode.iAx:
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{
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return string.Format( "{0,-9} {1}"
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, op
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, MYK(ax) );
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}
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default:
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throw new System.NotImplementedException();
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}
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}
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public const int SIZE_C = 9;
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public const int SIZE_B = 9;
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public const int SIZE_Bx = (SIZE_C + SIZE_B);
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public const int SIZE_A = 8;
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public const int SIZE_Ax = (SIZE_C + SIZE_B + SIZE_A);
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public const int SIZE_OP = 6;
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public const int POS_OP = 0;
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public const int POS_A = (POS_OP + SIZE_OP);
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public const int POS_C = (POS_A + SIZE_A);
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public const int POS_B = (POS_C + SIZE_C);
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public const int POS_Bx = POS_C;
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public const int POS_Ax = POS_A;
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#pragma warning disable 0429
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public const int MAXARG_Bx = SIZE_Bx<LuaConf.LUAI_BITSINT
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? ((1<<SIZE_Bx)-1)
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: LuaLimits.MAX_INT
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;
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public const int MAXARG_sBx = SIZE_Bx<LuaConf.LUAI_BITSINT
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? (MAXARG_Bx>>1)
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: LuaLimits.MAX_INT
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;
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#pragma warning restore 0429
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public const int MAXARG_Ax = ((1<<SIZE_Ax) - 1);
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public const int MAXARG_A = ((1<<SIZE_A) - 1);
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public const int MAXARG_B = ((1<<SIZE_B) - 1);
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public const int MAXARG_C = ((1<<SIZE_C) - 1);
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public const int BITRK = (1 << (SIZE_B - 1));
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public const int MAXINDEXRK = (BITRK - 1);
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public static int RKASK( int x )
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{
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return (x | BITRK );
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}
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public static bool ISK( int x )
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{
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return ((x) & BITRK ) != 0;
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}
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public static int INDEXK( int r )
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{
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return ((int)r & ~BITRK );
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}
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public static int MYK( int x )
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{
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return (-1-x);
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}
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public static uint MASK1( int size, int pos )
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{
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return ((~((~((uint)0)) << size)) << pos);
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}
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public static uint MASK0( int size, int pos )
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{
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return (~MASK1(size, pos));
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}
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public OpCode GET_OPCODE()
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{
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return (OpCode)( (Value >> POS_OP) & MASK1(SIZE_OP, 0) );
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}
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public Instruction SET_OPCODE( OpCode op )
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{
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Value = (Value & MASK0(SIZE_OP, POS_OP)) |
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((((uint)op) << POS_OP) & MASK1(SIZE_OP, POS_OP));
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return this;
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}
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public int GETARG( int pos, int size )
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{
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return (int)( (Value >> pos) & MASK1(size, 0) );
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}
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public Instruction SETARG( int value, int pos, int size )
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{
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Value = ((Value & MASK0(size, pos)) |
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(((uint)value << pos) & MASK1(size, pos)));
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return this;
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}
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public int GETARG_A() { return GETARG( POS_A, SIZE_A ); }
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public Instruction SETARG_A(int value) {
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return SETARG( value, POS_A, SIZE_A );
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}
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public int GETARG_B() { return GETARG( POS_B, SIZE_B ); }
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public Instruction SETARG_B(int value) {
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return SETARG( value, POS_B, SIZE_B );
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}
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public int GETARG_C() { return GETARG( POS_C, SIZE_C ); }
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public Instruction SETARG_C(int value) {
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return SETARG( value, POS_C, SIZE_C );
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}
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public int GETARG_Bx() { return GETARG( POS_Bx, SIZE_Bx ); }
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public Instruction SETARG_Bx(int value) {
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return SETARG( value, POS_Bx, SIZE_Bx );
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}
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public int GETARG_Ax() { return GETARG( POS_Ax, SIZE_Ax ); }
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public Instruction SETARG_Ax(int value) {
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return SETARG( value, POS_Ax, SIZE_Ax );
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}
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public int GETARG_sBx() { return GETARG_Bx() - MAXARG_sBx; }
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public Instruction SETARG_sBx(int value) {
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return SETARG_Bx(value+MAXARG_sBx);
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}
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public static Instruction CreateABC( OpCode op, int a, int b, int c )
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{
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return (Instruction)( (((uint)op) << POS_OP)
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| ((uint)a << POS_A)
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| ((uint)b << POS_B)
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| ((uint)c << POS_C));
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}
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public static Instruction CreateABx( OpCode op, int a, uint bc )
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{
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return (Instruction)( (((uint)op) << POS_OP)
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| ((uint)a << POS_A)
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| ((uint)bc << POS_Bx));
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}
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public static Instruction CreateAx( OpCode op, int a )
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{
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return (Instruction)( (((uint)op) << POS_OP)
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| ((uint)a << POS_Ax));
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}
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}
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public static class Coder
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{
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public const int NO_JUMP = -1;
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private const int NO_REG = ((1<<Instruction.SIZE_A) - 1);
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private static void FreeReg( FuncState fs, int reg )
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{
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if( !Instruction.ISK(reg) && reg >= fs.NumActVar )
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{
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fs.FreeReg--;
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Utl.Assert( reg == fs.FreeReg );
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}
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}
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private static void FreeExp( FuncState fs, ExpDesc e )
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{
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if( e.Kind == ExpKind.VNONRELOC )
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{
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FreeReg( fs, e.Info );
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}
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}
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private static bool IsNumeral( ExpDesc e )
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{
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return e.Kind == ExpKind.VKNUM
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&& e.ExitTrue == NO_JUMP
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&& e.ExitFalse == NO_JUMP;
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}
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private static bool ConstFolding( OpCode op, ExpDesc e1, ExpDesc e2 )
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{
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if( !IsNumeral(e1) || !IsNumeral(e2) )
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return false;
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if( (op == OpCode.OP_DIV || op == OpCode.OP_MOD)
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&& e2.NumberValue == 0.0 )
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{
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return false; // do not attempt to divide by 0
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}
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switch( op )
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{
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case OpCode.OP_ADD:
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e1.NumberValue = e1.NumberValue + e2.NumberValue;
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break;
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case OpCode.OP_SUB:
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e1.NumberValue = e1.NumberValue - e2.NumberValue;
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break;
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case OpCode.OP_MUL:
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e1.NumberValue = e1.NumberValue * e2.NumberValue;
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break;
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case OpCode.OP_DIV:
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e1.NumberValue = e1.NumberValue / e2.NumberValue;
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break;
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case OpCode.OP_MOD:
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var v1 = e1.NumberValue;
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var v2 = e2.NumberValue;
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e1.NumberValue = v1 - Math.Floor(v1/v2) * v2;
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break;
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case OpCode.OP_POW:
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e1.NumberValue = Math.Pow( e1.NumberValue, e2.NumberValue );
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break;
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case OpCode.OP_UNM:
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e1.NumberValue = -e1.NumberValue;
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break;
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default:
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throw new Exception("ConstFolding unknown op" + op);
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}
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return true;
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}
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public static void FixLine( FuncState fs, int line )
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{
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fs.Proto.LineInfo[ fs.Pc-1 ] = line;
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}
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private static void CodeArith( FuncState fs, OpCode op,
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ExpDesc e1, ExpDesc e2, int line )
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{
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if( ConstFolding( op, e1, e2 ) )
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return;
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int o2 = ( op != OpCode.OP_UNM && op != OpCode.OP_LEN )
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? Exp2RK( fs, e2 ) : 0;
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int o1 = Exp2RK( fs, e1 );
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if( o1 > o2 )
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{
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FreeExp( fs, e1 );
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FreeExp( fs, e2 );
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}
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else
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{
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FreeExp( fs, e2 );
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FreeExp( fs, e1 );
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}
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e1.Info = CodeABC( fs, op, 0, o1, o2 );
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e1.Kind = ExpKind.VRELOCABLE;
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FixLine( fs, line );
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}
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public static bool TestTMode( OpCode op )
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{
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return OpCodeInfo.GetMode( op ).TMode;
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}
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public static bool TestAMode( OpCode op )
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{
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return OpCodeInfo.GetMode( op ).AMode;
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}
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private static void FixJump( FuncState fs, int pc, int dest )
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{
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Instruction jmp = fs.Proto.Code[pc];
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int offset = dest - (pc + 1);
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Utl.Assert( dest != NO_JUMP );
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if( Math.Abs(offset) > Instruction.MAXARG_sBx )
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fs.Lexer.SyntaxError("control structure too long");
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jmp.SETARG_sBx( offset );
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fs.Proto.Code[pc] = jmp;
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}
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// returns current `pc' and mark it as a jump target
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// (to avoid wrong optimizations with consecutive
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// instructions not in the same basic block)
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public static int GetLabel( FuncState fs )
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{
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fs.LastTarget = fs.Pc;
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return fs.Pc;
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}
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private static int GetJump( FuncState fs, int pc )
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{
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int offset = fs.Proto.Code[pc].GETARG_sBx();
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if( offset == NO_JUMP ) // point to itself represents end of list
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return NO_JUMP; // end of list
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else
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return (pc+1) + offset; // turn offset into absolute position
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}
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private static InstructionPtr GetJumpControl( FuncState fs, int pc )
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{
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InstructionPtr pi = new InstructionPtr( fs.Proto.Code, pc );
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if( pc >= 1 && TestTMode( (pi-1).Value.GET_OPCODE() ))
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return (pi-1);
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else
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return pi;
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}
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// check whether list has any jump that do not produce a value
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// (or produce an inverted value)
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private static bool NeedValue( FuncState fs, int list )
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{
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for( ; list != NO_JUMP; list = GetJump( fs, list ) )
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|
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{
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Instruction i = GetJumpControl( fs, list ).Value;
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if( i.GET_OPCODE() != OpCode.OP_TESTSET )
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return true;
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}
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return false;
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}
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private static bool PatchTestReg( FuncState fs, int node, int reg )
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||
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{
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InstructionPtr pi = GetJumpControl( fs, node );
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||
|
|
if( pi.Value.GET_OPCODE() != OpCode.OP_TESTSET )
|
||
|
|
return false; // cannot patch other instructions
|
||
|
|
|
||
|
|
if( reg != NO_REG && reg != pi.Value.GETARG_B() )
|
||
|
|
pi.Value = pi.Value.SETARG_A( reg );
|
||
|
|
else
|
||
|
|
pi.Value = Instruction.CreateABC( OpCode.OP_TEST,
|
||
|
|
pi.Value.GETARG_B(), 0, pi.Value.GETARG_C() );
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void RemoveValues( FuncState fs, int list )
|
||
|
|
{
|
||
|
|
for(; list != NO_JUMP; list = GetJump( fs, list ) )
|
||
|
|
PatchTestReg( fs, list, NO_REG );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void PatchListAux( FuncState fs, int list, int vtarget,
|
||
|
|
int reg, int dtarget )
|
||
|
|
{
|
||
|
|
while( list != NO_JUMP )
|
||
|
|
{
|
||
|
|
int next = GetJump( fs, list );
|
||
|
|
if( PatchTestReg( fs, list, reg ) )
|
||
|
|
FixJump( fs, list, vtarget );
|
||
|
|
else
|
||
|
|
FixJump( fs, list, dtarget ); // jump to default target
|
||
|
|
list = next;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void DischargeJpc( FuncState fs )
|
||
|
|
{
|
||
|
|
PatchListAux( fs, fs.Jpc, fs.Pc, NO_REG, fs.Pc );
|
||
|
|
fs.Jpc = NO_JUMP;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void InvertJump( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
InstructionPtr pc = GetJumpControl( fs, e.Info );
|
||
|
|
Utl.Assert( TestTMode( pc.Value.GET_OPCODE() )
|
||
|
|
&& pc.Value.GET_OPCODE() != OpCode.OP_TESTSET
|
||
|
|
&& pc.Value.GET_OPCODE() != OpCode.OP_TEST );
|
||
|
|
pc.Value = pc.Value.SETARG_A( pc.Value.GETARG_A() == 0 ? 1 : 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int JumpOnCond( FuncState fs, ExpDesc e, bool cond )
|
||
|
|
{
|
||
|
|
if( e.Kind == ExpKind.VRELOCABLE )
|
||
|
|
{
|
||
|
|
Instruction ie = fs.GetCode( e ).Value;
|
||
|
|
if( ie.GET_OPCODE() == OpCode.OP_NOT )
|
||
|
|
{
|
||
|
|
fs.Pc--; // remove previous OP_NOT
|
||
|
|
return CondJump( fs, OpCode.OP_TEST, ie.GETARG_B(), 0,
|
||
|
|
(cond ? 0 : 1) );
|
||
|
|
}
|
||
|
|
// else go through
|
||
|
|
}
|
||
|
|
Discharge2AnyReg( fs, e );
|
||
|
|
FreeExp( fs, e );
|
||
|
|
return CondJump( fs, OpCode.OP_TESTSET, NO_REG, e.Info,
|
||
|
|
(cond ? 1 : 0) );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void GoIfTrue( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
int pc; // pc of last jump
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VJMP:
|
||
|
|
InvertJump( fs, e );
|
||
|
|
pc = e.Info;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VK:
|
||
|
|
case ExpKind.VKNUM:
|
||
|
|
case ExpKind.VTRUE:
|
||
|
|
pc = NO_JUMP;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
pc = JumpOnCond( fs, e, false );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// insert last jump in `f' list
|
||
|
|
e.ExitFalse = Concat( fs, e.ExitFalse, pc );
|
||
|
|
PatchToHere( fs, e.ExitTrue );
|
||
|
|
e.ExitTrue = NO_JUMP;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void GoIfFalse( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
int pc; // pc of last jump
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VJMP:
|
||
|
|
pc = e.Info;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VNIL:
|
||
|
|
case ExpKind.VFALSE:
|
||
|
|
pc = NO_JUMP;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
pc = JumpOnCond( fs, e, true );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// insert last jump in `t' list
|
||
|
|
e.ExitTrue = Concat( fs, e.ExitTrue, pc );
|
||
|
|
PatchToHere( fs, e.ExitFalse );
|
||
|
|
e.ExitFalse = NO_JUMP;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void CodeNot( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VNIL:
|
||
|
|
case ExpKind.VFALSE:
|
||
|
|
e.Kind = ExpKind.VTRUE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VK:
|
||
|
|
case ExpKind.VKNUM:
|
||
|
|
case ExpKind.VTRUE:
|
||
|
|
e.Kind = ExpKind.VFALSE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VJMP:
|
||
|
|
InvertJump( fs, e );
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VRELOCABLE:
|
||
|
|
case ExpKind.VNONRELOC:
|
||
|
|
Discharge2AnyReg( fs, e );
|
||
|
|
FreeExp( fs, e );
|
||
|
|
e.Info = CodeABC( fs, OpCode.OP_NOT, 0, e.Info, 0 );
|
||
|
|
e.Kind = ExpKind.VRELOCABLE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
throw new Exception("CodeNot unknown e.Kind:" + e.Kind);
|
||
|
|
}
|
||
|
|
|
||
|
|
// interchange true and false lists
|
||
|
|
{ int temp = e.ExitFalse; e.ExitFalse = e.ExitTrue; e.ExitTrue = temp; }
|
||
|
|
|
||
|
|
RemoveValues( fs, e.ExitFalse );
|
||
|
|
RemoveValues( fs, e.ExitTrue );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void CodeComp( FuncState fs, OpCode op, int cond,
|
||
|
|
ExpDesc e1, ExpDesc e2 )
|
||
|
|
{
|
||
|
|
int o1 = Exp2RK( fs, e1 );
|
||
|
|
int o2 = Exp2RK( fs, e2 );
|
||
|
|
FreeExp( fs, e2 );
|
||
|
|
FreeExp( fs, e1 );
|
||
|
|
|
||
|
|
// exchange args to replace by `<' or `<='
|
||
|
|
if( cond == 0 && op != OpCode.OP_EQ ) {
|
||
|
|
int temp;
|
||
|
|
temp = o1; o1 = o2; o2 = temp; // o1 <==> o2
|
||
|
|
cond = 1;
|
||
|
|
}
|
||
|
|
e1.Info = CondJump( fs, op, cond, o1, o2 );
|
||
|
|
e1.Kind = ExpKind.VJMP;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Prefix( FuncState fs, UnOpr op, ExpDesc e, int line )
|
||
|
|
{
|
||
|
|
ExpDesc e2 = new ExpDesc();
|
||
|
|
e2.ExitTrue = NO_JUMP;
|
||
|
|
e2.ExitFalse = NO_JUMP;
|
||
|
|
e2.Kind = ExpKind.VKNUM;
|
||
|
|
e2.NumberValue = 0.0;
|
||
|
|
|
||
|
|
switch( op )
|
||
|
|
{
|
||
|
|
case UnOpr.MINUS: {
|
||
|
|
if( IsNumeral( e ) ) // minus constant?
|
||
|
|
{
|
||
|
|
e.NumberValue = -e.NumberValue;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Exp2AnyReg( fs, e );
|
||
|
|
CodeArith( fs, OpCode.OP_UNM, e, e2, line );
|
||
|
|
}
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case UnOpr.NOT: {
|
||
|
|
CodeNot( fs, e );
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case UnOpr.LEN: {
|
||
|
|
Exp2AnyReg( fs, e ); // cannot operate on constants
|
||
|
|
CodeArith( fs, OpCode.OP_LEN, e, e2, line );
|
||
|
|
} break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
throw new Exception("[Coder]Prefix Unknown UnOpr:" + op);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Infix( FuncState fs, BinOpr op, ExpDesc e )
|
||
|
|
{
|
||
|
|
switch( op )
|
||
|
|
{
|
||
|
|
case BinOpr.AND: {
|
||
|
|
GoIfTrue( fs, e );
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case BinOpr.OR: {
|
||
|
|
GoIfFalse( fs, e );
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case BinOpr.CONCAT: {
|
||
|
|
Exp2NextReg( fs, e ); // operand must be on the `stack'
|
||
|
|
} break;
|
||
|
|
|
||
|
|
case BinOpr.ADD:
|
||
|
|
case BinOpr.SUB:
|
||
|
|
case BinOpr.MUL:
|
||
|
|
case BinOpr.DIV:
|
||
|
|
case BinOpr.MOD:
|
||
|
|
case BinOpr.POW: {
|
||
|
|
if( !IsNumeral(e) )
|
||
|
|
Exp2RK( fs, e );
|
||
|
|
} break;
|
||
|
|
|
||
|
|
default: {
|
||
|
|
Exp2RK( fs, e );
|
||
|
|
} break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Posfix( FuncState fs, BinOpr op,
|
||
|
|
ExpDesc e1, ExpDesc e2, int line )
|
||
|
|
{
|
||
|
|
switch( op )
|
||
|
|
{
|
||
|
|
case BinOpr.AND: {
|
||
|
|
Utl.Assert( e1.ExitTrue == NO_JUMP );
|
||
|
|
DischargeVars( fs, e2 );
|
||
|
|
e2.ExitFalse = Concat( fs, e2.ExitFalse, e1.ExitFalse );
|
||
|
|
e1.CopyFrom( e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.OR: {
|
||
|
|
Utl.Assert( e1.ExitFalse == NO_JUMP );
|
||
|
|
DischargeVars( fs, e2 );
|
||
|
|
e2.ExitTrue = Concat( fs, e2.ExitTrue, e1.ExitTrue );
|
||
|
|
e1.CopyFrom( e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.CONCAT: {
|
||
|
|
Exp2Val( fs, e2 );
|
||
|
|
var pe2 = fs.GetCode( e2 );
|
||
|
|
if( e2.Kind == ExpKind.VRELOCABLE &&
|
||
|
|
pe2.Value.GET_OPCODE() == OpCode.OP_CONCAT )
|
||
|
|
{
|
||
|
|
Utl.Assert( e1.Info == pe2.Value.GETARG_B()-1 );
|
||
|
|
FreeExp( fs, e1 );
|
||
|
|
pe2.Value = pe2.Value.SETARG_B( e1.Info );
|
||
|
|
e1.Kind = ExpKind.VRELOCABLE;
|
||
|
|
e1.Info = e2.Info;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// operand must be on the `stack'
|
||
|
|
Exp2NextReg( fs, e2 );
|
||
|
|
CodeArith( fs, OpCode.OP_CONCAT, e1, e2, line );
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.ADD: {
|
||
|
|
CodeArith( fs, OpCode.OP_ADD, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.SUB: {
|
||
|
|
CodeArith( fs, OpCode.OP_SUB, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.MUL: {
|
||
|
|
CodeArith( fs, OpCode.OP_MUL, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.DIV: {
|
||
|
|
CodeArith( fs, OpCode.OP_DIV, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.MOD: {
|
||
|
|
CodeArith( fs, OpCode.OP_MOD, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.POW: {
|
||
|
|
CodeArith( fs, OpCode.OP_POW, e1, e2, line);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.EQ: {
|
||
|
|
CodeComp( fs, OpCode.OP_EQ, 1, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.LT: {
|
||
|
|
CodeComp( fs, OpCode.OP_LT, 1, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.LE: {
|
||
|
|
CodeComp( fs, OpCode.OP_LE, 1, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.NE: {
|
||
|
|
CodeComp( fs, OpCode.OP_EQ, 0, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.GT: {
|
||
|
|
CodeComp( fs, OpCode.OP_LT, 0, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case BinOpr.GE: {
|
||
|
|
CodeComp( fs, OpCode.OP_LE, 0, e1, e2 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
default: Utl.Assert(false); break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int Jump( FuncState fs )
|
||
|
|
{
|
||
|
|
int jpc = fs.Jpc; // save list of jumps to here
|
||
|
|
fs.Jpc = NO_JUMP;
|
||
|
|
int j = CodeAsBx( fs, OpCode.OP_JMP, 0, NO_JUMP );
|
||
|
|
j = Concat( fs, j, jpc );
|
||
|
|
return j;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void JumpTo( FuncState fs, int target )
|
||
|
|
{
|
||
|
|
PatchList( fs, Jump(fs), target );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Ret( FuncState fs, int first, int nret )
|
||
|
|
{
|
||
|
|
CodeABC( fs, OpCode.OP_RETURN, first, nret+1, 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int CondJump( FuncState fs, OpCode op, int a, int b, int c )
|
||
|
|
{
|
||
|
|
CodeABC( fs, op, a, b, c );
|
||
|
|
return Jump( fs );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void PatchList( FuncState fs, int list, int target )
|
||
|
|
{
|
||
|
|
if( target == fs.Pc )
|
||
|
|
PatchToHere( fs, list );
|
||
|
|
else
|
||
|
|
{
|
||
|
|
Utl.Assert( target < fs.Pc );
|
||
|
|
PatchListAux( fs, list, target, NO_REG, target );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void PatchClose( FuncState fs, int list, int level )
|
||
|
|
{
|
||
|
|
level++; // argument is +1 to reserve 0 as non-op
|
||
|
|
while( list != NO_JUMP )
|
||
|
|
{
|
||
|
|
int next = GetJump( fs, list );
|
||
|
|
var pi = new InstructionPtr( fs.Proto.Code, list );;
|
||
|
|
Utl.Assert( pi.Value.GET_OPCODE() == OpCode.OP_JMP &&
|
||
|
|
( pi.Value.GETARG_A() == 0 ||
|
||
|
|
pi.Value.GETARG_A() >= level ) );
|
||
|
|
pi.Value = pi.Value.SETARG_A( level );
|
||
|
|
list = next;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void PatchToHere( FuncState fs, int list )
|
||
|
|
{
|
||
|
|
GetLabel( fs );
|
||
|
|
fs.Jpc = Concat( fs, fs.Jpc, list );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int Concat( FuncState fs, int l1, int l2 )
|
||
|
|
{
|
||
|
|
if( l2 == NO_JUMP )
|
||
|
|
return l1;
|
||
|
|
else if( l1 == NO_JUMP )
|
||
|
|
return l2;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int list = l1;
|
||
|
|
int next = GetJump( fs, list );
|
||
|
|
|
||
|
|
// find last element
|
||
|
|
while( next != NO_JUMP )
|
||
|
|
{
|
||
|
|
list = next;
|
||
|
|
next = GetJump( fs, list );
|
||
|
|
}
|
||
|
|
FixJump( fs, list, l2 );
|
||
|
|
return l1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int StringK( FuncState fs, string s )
|
||
|
|
{
|
||
|
|
var o = new TValue();
|
||
|
|
o.SetSValue(s);
|
||
|
|
return AddK( fs, ref o, ref o );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int NumberK( FuncState fs, double r )
|
||
|
|
{
|
||
|
|
var o = new TValue();
|
||
|
|
o.SetNValue(r);
|
||
|
|
return AddK( fs, ref o, ref o );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int BoolK( FuncState fs, bool b )
|
||
|
|
{
|
||
|
|
var o = new TValue();
|
||
|
|
o.SetBValue(b);
|
||
|
|
return AddK( fs, ref o, ref o );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int NilK( FuncState fs )
|
||
|
|
{
|
||
|
|
// // cannot use nil as key;
|
||
|
|
// // instead use table itself to represent nil
|
||
|
|
// var k = fs.H;
|
||
|
|
// var o = new LuaNil();
|
||
|
|
// return AddK( fs, k, o );
|
||
|
|
|
||
|
|
var o = new TValue();
|
||
|
|
o.SetNilValue();
|
||
|
|
return AddK( fs, ref o, ref o );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int AddK(FuncState fs, ref TValue key, ref TValue v)
|
||
|
|
{
|
||
|
|
int idx;
|
||
|
|
int keyHash = key.GetHashCode();
|
||
|
|
|
||
|
|
if (fs.H.TryGetValue(keyHash, out idx))
|
||
|
|
return idx;
|
||
|
|
|
||
|
|
idx = fs.Proto.K.Count;
|
||
|
|
fs.H.Add(keyHash, idx);
|
||
|
|
|
||
|
|
var newItem = new StkId();
|
||
|
|
newItem.V.SetObj(ref v);
|
||
|
|
fs.Proto.K.Add(newItem);
|
||
|
|
return idx;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Indexed( FuncState fs, ExpDesc t, ExpDesc k )
|
||
|
|
{
|
||
|
|
t.Ind.T = t.Info;
|
||
|
|
t.Ind.Idx = Exp2RK( fs, k );
|
||
|
|
t.Ind.Vt = (t.Kind == ExpKind.VUPVAL) ? ExpKind.VUPVAL
|
||
|
|
: ExpKind.VLOCAL; // FIXME
|
||
|
|
t.Kind = ExpKind.VINDEXED;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static bool HasJumps( ExpDesc e )
|
||
|
|
{
|
||
|
|
return e.ExitTrue != e.ExitFalse;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int CodeLabel( FuncState fs, int a, int b, int jump )
|
||
|
|
{
|
||
|
|
GetLabel( fs ); // those instructions may be jump targets
|
||
|
|
return CodeABC( fs, OpCode.OP_LOADBOOL, a, b, jump );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void Discharge2Reg( FuncState fs, ExpDesc e, int reg )
|
||
|
|
{
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VNIL: {
|
||
|
|
CodeNil( fs, reg, 1 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case ExpKind.VFALSE:
|
||
|
|
case ExpKind.VTRUE: {
|
||
|
|
CodeABC( fs, OpCode.OP_LOADBOOL, reg,
|
||
|
|
(e.Kind == ExpKind.VTRUE ? 1 : 0), 0 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case ExpKind.VK: {
|
||
|
|
CodeK( fs, reg, e.Info );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case ExpKind.VKNUM: {
|
||
|
|
CodeK( fs, reg, NumberK( fs, e.NumberValue ) );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case ExpKind.VRELOCABLE: {
|
||
|
|
InstructionPtr pi = fs.GetCode(e);
|
||
|
|
pi.Value = pi.Value.SETARG_A(reg);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
case ExpKind.VNONRELOC: {
|
||
|
|
if( reg != e.Info )
|
||
|
|
CodeABC( fs, OpCode.OP_MOVE, reg, e.Info, 0 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
default: {
|
||
|
|
Utl.Assert( e.Kind == ExpKind.VVOID || e.Kind == ExpKind.VJMP );
|
||
|
|
return; // nothing to do...
|
||
|
|
}
|
||
|
|
}
|
||
|
|
e.Info = reg;
|
||
|
|
e.Kind = ExpKind.VNONRELOC;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void CheckStack( FuncState fs, int n )
|
||
|
|
{
|
||
|
|
int newStack = fs.FreeReg + n;
|
||
|
|
if( newStack > fs.Proto.MaxStackSize )
|
||
|
|
{
|
||
|
|
if( newStack >= LuaLimits.MAXSTACK )
|
||
|
|
{
|
||
|
|
fs.Lexer.SyntaxError("function or expression too complex");
|
||
|
|
}
|
||
|
|
fs.Proto.MaxStackSize = (byte)newStack;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void ReserveRegs( FuncState fs, int n )
|
||
|
|
{
|
||
|
|
CheckStack( fs, n );
|
||
|
|
fs.FreeReg += n;
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void Discharge2AnyReg( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
if( e.Kind != ExpKind.VNONRELOC )
|
||
|
|
{
|
||
|
|
ReserveRegs( fs, 1 );
|
||
|
|
Discharge2Reg( fs, e, fs.FreeReg-1 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
private static void Exp2Reg( FuncState fs, ExpDesc e, int reg )
|
||
|
|
{
|
||
|
|
Discharge2Reg( fs, e, reg );
|
||
|
|
if( e.Kind == ExpKind.VJMP )
|
||
|
|
{
|
||
|
|
e.ExitTrue = Concat( fs, e.ExitTrue, e.Info );
|
||
|
|
}
|
||
|
|
|
||
|
|
if( HasJumps(e) )
|
||
|
|
{
|
||
|
|
int p_f = NO_JUMP;
|
||
|
|
int p_t = NO_JUMP;
|
||
|
|
if( NeedValue( fs, e.ExitTrue ) || NeedValue( fs, e.ExitFalse ) )
|
||
|
|
{
|
||
|
|
int fj = (e.Kind == ExpKind.VJMP) ? NO_JUMP : Jump( fs );
|
||
|
|
p_f = CodeLabel( fs, reg, 0, 1 );
|
||
|
|
p_t = CodeLabel( fs, reg, 1, 0 );
|
||
|
|
PatchToHere( fs, fj );
|
||
|
|
}
|
||
|
|
|
||
|
|
// position after whole expression
|
||
|
|
int final = GetLabel( fs );
|
||
|
|
PatchListAux( fs, e.ExitFalse, final, reg, p_f );
|
||
|
|
PatchListAux( fs, e.ExitTrue, final, reg, p_t );
|
||
|
|
}
|
||
|
|
|
||
|
|
e.ExitFalse = NO_JUMP;
|
||
|
|
e.ExitTrue = NO_JUMP;
|
||
|
|
e.Info = reg;
|
||
|
|
e.Kind = ExpKind.VNONRELOC;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Exp2NextReg( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
FreeExp( fs, e );
|
||
|
|
ReserveRegs( fs, 1 );
|
||
|
|
Exp2Reg( fs, e, fs.FreeReg-1 );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Exp2Val( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
if( HasJumps(e) )
|
||
|
|
Exp2AnyReg( fs, e );
|
||
|
|
else
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int Exp2RK( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
Exp2Val( fs, e );
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VTRUE:
|
||
|
|
case ExpKind.VFALSE:
|
||
|
|
case ExpKind.VNIL: {
|
||
|
|
// constant fits in RK operand?
|
||
|
|
if( fs.Proto.K.Count <= Instruction.MAXINDEXRK )
|
||
|
|
{
|
||
|
|
e.Info = (e.Kind == ExpKind.VNIL) ? NilK(fs)
|
||
|
|
: BoolK( fs, (e.Kind == ExpKind.VTRUE ) );
|
||
|
|
e.Kind = ExpKind.VK;
|
||
|
|
return Instruction.RKASK( e.Info );
|
||
|
|
}
|
||
|
|
else break;
|
||
|
|
}
|
||
|
|
case ExpKind.VKNUM:
|
||
|
|
case ExpKind.VK:
|
||
|
|
{
|
||
|
|
if( e.Kind == ExpKind.VKNUM )
|
||
|
|
{
|
||
|
|
e.Info = NumberK( fs, e.NumberValue );
|
||
|
|
e.Kind = ExpKind.VK;
|
||
|
|
}
|
||
|
|
|
||
|
|
if( e.Info <= Instruction.MAXINDEXRK )
|
||
|
|
return Instruction.RKASK( e.Info );
|
||
|
|
else break;
|
||
|
|
}
|
||
|
|
|
||
|
|
default: break;
|
||
|
|
}
|
||
|
|
|
||
|
|
return Exp2AnyReg( fs, e );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int Exp2AnyReg( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
DischargeVars( fs, e );
|
||
|
|
if( e.Kind == ExpKind.VNONRELOC )
|
||
|
|
{
|
||
|
|
// exp is already in a register
|
||
|
|
if( ! HasJumps( e ) )
|
||
|
|
return e.Info;
|
||
|
|
|
||
|
|
// reg. is not a local?
|
||
|
|
if( e.Info >= fs.NumActVar )
|
||
|
|
{
|
||
|
|
Exp2Reg( fs, e, e.Info );
|
||
|
|
return e.Info;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
Exp2NextReg( fs, e ); // default
|
||
|
|
return e.Info;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Exp2AnyRegUp( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
if( e.Kind != ExpKind.VUPVAL || HasJumps( e ) )
|
||
|
|
{
|
||
|
|
Exp2AnyReg( fs, e );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void DischargeVars( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
switch( e.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VLOCAL:
|
||
|
|
e.Kind = ExpKind.VNONRELOC;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VUPVAL:
|
||
|
|
e.Info = CodeABC( fs, OpCode.OP_GETUPVAL, 0, e.Info, 0 );
|
||
|
|
e.Kind = ExpKind.VRELOCABLE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VINDEXED:
|
||
|
|
OpCode op = OpCode.OP_GETTABUP;
|
||
|
|
FreeReg( fs, e.Ind.Idx );
|
||
|
|
if( e.Ind.Vt == ExpKind.VLOCAL )
|
||
|
|
{
|
||
|
|
FreeReg( fs, e.Ind.T );
|
||
|
|
op = OpCode.OP_GETTABLE;
|
||
|
|
}
|
||
|
|
e.Info = CodeABC( fs, op, 0, e.Ind.T, e.Ind.Idx );
|
||
|
|
e.Kind = ExpKind.VRELOCABLE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ExpKind.VVARARG:
|
||
|
|
case ExpKind.VCALL:
|
||
|
|
SetOneRet( fs, e );
|
||
|
|
break;
|
||
|
|
|
||
|
|
default: break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void SetReturns( FuncState fs, ExpDesc e, int nResults )
|
||
|
|
{
|
||
|
|
if( e.Kind == ExpKind.VCALL ) { // expression is an open function call?
|
||
|
|
var pi = fs.GetCode(e);
|
||
|
|
pi.Value = pi.Value.SETARG_C( nResults+1 );
|
||
|
|
}
|
||
|
|
else if( e.Kind == ExpKind.VVARARG ) {
|
||
|
|
var pi = fs.GetCode(e);
|
||
|
|
pi.Value = pi.Value.SETARG_B( nResults+1 ).SETARG_A( fs.FreeReg );
|
||
|
|
ReserveRegs( fs, 1 );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void SetMultiRet( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
SetReturns( fs, e, LuaDef.LUA_MULTRET );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void SetOneRet( FuncState fs, ExpDesc e )
|
||
|
|
{
|
||
|
|
// expression is an open function call?
|
||
|
|
if( e.Kind == ExpKind.VCALL )
|
||
|
|
{
|
||
|
|
e.Kind = ExpKind.VNONRELOC;
|
||
|
|
e.Info = ( fs.GetCode( e ) ).Value.GETARG_A();
|
||
|
|
}
|
||
|
|
else if( e.Kind == ExpKind.VVARARG )
|
||
|
|
{
|
||
|
|
var pi = fs.GetCode( e );
|
||
|
|
pi.Value = pi.Value.SETARG_B( 2 );
|
||
|
|
e.Kind = ExpKind.VRELOCABLE; // can relocate its simple result
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void StoreVar( FuncState fs, ExpDesc v, ExpDesc e )
|
||
|
|
{
|
||
|
|
switch( v.Kind )
|
||
|
|
{
|
||
|
|
case ExpKind.VLOCAL: {
|
||
|
|
FreeExp( fs, e );
|
||
|
|
Exp2Reg( fs, e, v.Info );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
case ExpKind.VUPVAL: {
|
||
|
|
int c = Exp2AnyReg( fs, e );
|
||
|
|
CodeABC( fs, OpCode.OP_SETUPVAL, c, v.Info, 0 );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
case ExpKind.VINDEXED: {
|
||
|
|
OpCode op = (v.Ind.Vt == ExpKind.VLOCAL)
|
||
|
|
? OpCode.OP_SETTABLE
|
||
|
|
: OpCode.OP_SETTABUP;
|
||
|
|
int c = Exp2RK( fs, e );
|
||
|
|
CodeABC( fs, op, v.Ind.T, v.Ind.Idx, c );
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
{
|
||
|
|
throw new NotImplementedException("invalid var kind to store");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
FreeExp( fs, e );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void Self( FuncState fs, ExpDesc e, ExpDesc key )
|
||
|
|
{
|
||
|
|
Exp2AnyReg( fs, e );
|
||
|
|
int ereg = e.Info; // register where `e' is placed
|
||
|
|
FreeExp( fs, e );
|
||
|
|
e.Info = fs.FreeReg; // base register for op_self
|
||
|
|
e.Kind = ExpKind.VNONRELOC;
|
||
|
|
ReserveRegs( fs, 2 );
|
||
|
|
CodeABC( fs, OpCode.OP_SELF, e.Info, ereg, Coder.Exp2RK(fs, key) );
|
||
|
|
FreeExp( fs, key );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void SetList( FuncState fs, int t, int nelems, int tostore )
|
||
|
|
{
|
||
|
|
int c = (nelems - 1) / LuaDef.LFIELDS_PER_FLUSH + 1;
|
||
|
|
int b = (tostore == LuaDef.LUA_MULTRET) ? 0 : tostore;
|
||
|
|
Utl.Assert( tostore != 0 );
|
||
|
|
|
||
|
|
if( c <= Instruction.MAXARG_C )
|
||
|
|
{
|
||
|
|
CodeABC( fs, OpCode.OP_SETLIST, t, b, c );
|
||
|
|
}
|
||
|
|
else if( c <= Instruction.MAXARG_Ax )
|
||
|
|
{
|
||
|
|
CodeABC( fs, OpCode.OP_SETLIST, t, b, 0 );
|
||
|
|
CodeExtraArg( fs, c );
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
fs.Lexer.SyntaxError("constructor too long");
|
||
|
|
}
|
||
|
|
|
||
|
|
// free registers with list values
|
||
|
|
fs.FreeReg = t + 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
public static void CodeNil( FuncState fs, int from, int n )
|
||
|
|
{
|
||
|
|
int l = from + n - 1; // last register to set nil
|
||
|
|
if( fs.Pc > fs.LastTarget ) // no jumps to current position?
|
||
|
|
{
|
||
|
|
var previous = new InstructionPtr( fs.Proto.Code, fs.Pc-1 );
|
||
|
|
if( previous.Value.GET_OPCODE() == OpCode.OP_LOADNIL )
|
||
|
|
{
|
||
|
|
int pfrom = previous.Value.GETARG_A();
|
||
|
|
int pl = pfrom + previous.Value.GETARG_B();
|
||
|
|
|
||
|
|
// can connect both?
|
||
|
|
if( (pfrom <= from && from <= pl + 1) ||
|
||
|
|
(from <= pfrom && pfrom <= l + 1))
|
||
|
|
{
|
||
|
|
if( pfrom < from ) from = pfrom; // from=min(from,pfrom)
|
||
|
|
if( pl > l ) l = pl; // l=max(l,pl)
|
||
|
|
previous.Value = previous.Value.SETARG_A( from );
|
||
|
|
previous.Value = previous.Value.SETARG_B( l - from );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// else go through
|
||
|
|
}
|
||
|
|
|
||
|
|
// else no optimization
|
||
|
|
CodeABC( fs, OpCode.OP_LOADNIL, from, n-1, 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
private static int CodeExtraArg( FuncState fs, int a )
|
||
|
|
{
|
||
|
|
Utl.Assert( a <= Instruction.MAXARG_Ax );
|
||
|
|
return Code( fs, Instruction.CreateAx( OpCode.OP_EXTRAARG, a ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int CodeK( FuncState fs, int reg, int k )
|
||
|
|
{
|
||
|
|
if( k <= Instruction.MAXARG_Bx )
|
||
|
|
return CodeABx( fs, OpCode.OP_LOADK, reg, (uint)k );
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int p = CodeABx( fs, OpCode.OP_LOADKX, reg, 0 );
|
||
|
|
CodeExtraArg( fs, k );
|
||
|
|
return p;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int CodeAsBx( FuncState fs, OpCode op, int a, int sBx )
|
||
|
|
{
|
||
|
|
return CodeABx( fs, op, a, ((uint)sBx)+Instruction.MAXARG_sBx);
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int CodeABx( FuncState fs, OpCode op, int a, uint bc )
|
||
|
|
{
|
||
|
|
var mode = OpCodeInfo.GetMode(op);
|
||
|
|
Utl.Assert( mode.OpMode == OpMode.iABx
|
||
|
|
|| mode.OpMode == OpMode.iAsBx );
|
||
|
|
Utl.Assert( mode.CMode == OpArgMask.OpArgN );
|
||
|
|
Utl.Assert( a < Instruction.MAXARG_A & bc <= Instruction.MAXARG_Bx );
|
||
|
|
return Code( fs, Instruction.CreateABx( op, a, bc ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int CodeABC( FuncState fs, OpCode op, int a, int b, int c )
|
||
|
|
{
|
||
|
|
return Code( fs, Instruction.CreateABC( op, a, b, c ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
public static int Code( FuncState fs, Instruction i )
|
||
|
|
{
|
||
|
|
DischargeJpc( fs ); // `pc' will change
|
||
|
|
|
||
|
|
while( fs.Proto.Code.Count <= fs.Pc )
|
||
|
|
{
|
||
|
|
fs.Proto.Code.Add( new Instruction(LuaLimits.MAX_INT) );
|
||
|
|
}
|
||
|
|
fs.Proto.Code[ fs.Pc ] = i;
|
||
|
|
|
||
|
|
while( fs.Proto.LineInfo.Count <= fs.Pc )
|
||
|
|
{
|
||
|
|
fs.Proto.LineInfo.Add( LuaLimits.MAX_INT );
|
||
|
|
}
|
||
|
|
fs.Proto.LineInfo[ fs.Pc ] = fs.Lexer.LastLine;
|
||
|
|
|
||
|
|
return fs.Pc++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|