/// <summary>
/// Decodes the specified instruction.
/// </summary>
/// <param name="ctx">The context.</param>
/// <param name="decoder">The instruction decoder, which holds the code stream.</param>
public override void Decode(Context ctx, IInstructionDecoder decoder)
{
// Decode base classes first
base.Decode(ctx, decoder);
SigType type;
object value;
// Opcode specific handling
switch (_opcode)
{
case OpCode.Ldc_i4: {
int i;
decoder.Decode(out i);
type = new SigType(CilElementType.I4);
value = i;
}
break;
case OpCode.Ldc_i4_s: {
sbyte sb;
decoder.Decode(out sb);
type = new SigType(CilElementType.I4);
value = sb;
}
break;
case OpCode.Ldc_i8: {
long l;
decoder.Decode(out l);
type = new SigType(CilElementType.I8);
value = l;
}
break;
case OpCode.Ldc_r4: {
float f;
decoder.Decode(out f);
type = new SigType(CilElementType.R4);
value = f;
}
break;
case OpCode.Ldc_r8: {
double d;
decoder.Decode(out d);
type = new SigType(CilElementType.R8);
value = d;
}
break;
case OpCode.Ldnull:
ctx.Result = ConstantOperand.GetNull();
return;
case OpCode.Ldc_i4_0:
ctx.Result = ConstantOperand.FromValue(0);
return;
case OpCode.Ldc_i4_1:
ctx.Result = ConstantOperand.FromValue(1);
return;
case OpCode.Ldc_i4_2:
ctx.Result = ConstantOperand.FromValue(2);
return;
case OpCode.Ldc_i4_3:
ctx.Result = ConstantOperand.FromValue(3);
return;
case OpCode.Ldc_i4_4:
ctx.Result = ConstantOperand.FromValue(4);
return;
case OpCode.Ldc_i4_5:
ctx.Result = ConstantOperand.FromValue(5);
return;
case OpCode.Ldc_i4_6:
ctx.Result = ConstantOperand.FromValue(6);
return;
case OpCode.Ldc_i4_7:
ctx.Result = ConstantOperand.FromValue(7);
return;
case OpCode.Ldc_i4_8:
ctx.Result = ConstantOperand.FromValue(8);
return;
case OpCode.Ldc_i4_m1:
ctx.Result = ConstantOperand.FromValue(-1);
return;
default:
throw new NotImplementedException();
}
ctx.Result = new ConstantOperand(type, value);
ctx.Ignore = true;
}
/// <summary>
/// Decodes the specified instruction.
/// </summary>
/// <param name="ctx">The context.</param>
/// <param name="decoder">The instruction decoder, which holds the code stream.</param>
public override void Decode(Context ctx, IInstructionDecoder decoder)
{
// Decode base classes first
base.Decode(ctx, decoder);
ConstantOperand constantValueOperand;
// Opcode specific handling
switch (opcode)
{
case OpCode.Ldc_i4:
{
int i = decoder.DecodeInt();
constantValueOperand = new ConstantOperand(new SigType(CilElementType.I4), i);
}
break;
case OpCode.Ldc_i4_s:
{
sbyte sb = decoder.DecodeSByte();
constantValueOperand = new ConstantOperand(new SigType(CilElementType.I4), sb);
}
break;
case OpCode.Ldc_i8:
{
long l = decoder.DecodeLong();
constantValueOperand = new ConstantOperand(new SigType(CilElementType.I8), l);
}
break;
case OpCode.Ldc_r4:
{
float f = decoder.DecodeFloat();
constantValueOperand = new ConstantOperand(new SigType(CilElementType.R4), f);
}
break;
case OpCode.Ldc_r8:
{
double d = decoder.DecodeDouble();
constantValueOperand = new ConstantOperand(new SigType(CilElementType.R8), d);
}
break;
case OpCode.Ldnull:
constantValueOperand = ConstantOperand.GetNull();
break;
case OpCode.Ldc_i4_0:
constantValueOperand = ConstantOperand.FromValue(0);
break;
case OpCode.Ldc_i4_1:
constantValueOperand = ConstantOperand.FromValue(1);
break;
case OpCode.Ldc_i4_2:
constantValueOperand = ConstantOperand.FromValue(2);
break;
case OpCode.Ldc_i4_3:
constantValueOperand = ConstantOperand.FromValue(3);
break;
case OpCode.Ldc_i4_4:
constantValueOperand = ConstantOperand.FromValue(4);
break;
case OpCode.Ldc_i4_5:
constantValueOperand = ConstantOperand.FromValue(5);
break;
case OpCode.Ldc_i4_6:
constantValueOperand = ConstantOperand.FromValue(6);
break;
case OpCode.Ldc_i4_7:
constantValueOperand = ConstantOperand.FromValue(7);
break;
case OpCode.Ldc_i4_8:
constantValueOperand = ConstantOperand.FromValue(8);
break;
case OpCode.Ldc_i4_m1:
constantValueOperand = ConstantOperand.FromValue(-1);
break;
default:
throw new System.NotImplementedException();
}
ctx.Operand1 = constantValueOperand;
ctx.Result = decoder.Compiler.CreateTemporary(constantValueOperand.Type);
}
