rjx-mirror/Ryujinx/Cpu/Decoder/AOpCodeAluImm.cs
2018-02-04 20:08:20 -03:00

41 lines
No EOL
983 B
C#

using ChocolArm64.Instruction;
using System;
namespace ChocolArm64.Decoder
{
class AOpCodeAluImm : AOpCodeAlu, IAOpCodeAluImm
{
public long Imm { get; private set; }
public AOpCodeAluImm(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
{
if (DataOp == ADataOp.Arithmetic)
{
Imm = (OpCode >> 10) & 0xfff;
int Shift = (OpCode >> 22) & 3;
//Assert Shift < 2
Imm <<= Shift * 12;
}
else if (DataOp == ADataOp.Logical)
{
var BM = ADecoderHelper.DecodeBitMask(OpCode, true);
if (BM.IsUndefined)
{
Emitter = AInstEmit.Und;
return;
}
Imm = BM.WMask;
}
else
{
throw new ArgumentException(nameof(OpCode));
}
}
}
}