rjx-mirror/ARMeilleure/Decoders/OpCodeT16IfThen.cs

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2022-02-17 22:39:45 +00:00
using System.Collections.Generic;
using System.Reflection.Emit;
namespace ARMeilleure.Decoders
{
class OpCodeT16IfThen : OpCodeT16
{
public Condition[] IfThenBlockConds { get; }
public int IfThenBlockSize { get { return IfThenBlockConds.Length; } }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT16IfThen(inst, address, opCode);
public OpCodeT16IfThen(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
List<Condition> conds = new();
int cond = (opCode >> 4) & 0xf;
int mask = opCode & 0xf;
conds.Add((Condition)cond);
while ((mask & 7) != 0)
{
int newLsb = (mask >> 3) & 1;
cond = (cond & 0xe) | newLsb;
mask <<= 1;
conds.Add((Condition)cond);
}
IfThenBlockConds = conds.ToArray();
}
}
}