static List<CStatement> Bclr_C(uint pc, uint instruction)
{
Instruction i = new Instruction(instruction);
List<CStatement> stats = new List<CStatement>();
if ((i.BO() & 4) == 0)
{
CStatement ctrSub = new CStatement(CStatement.Kinds.Subtraction, "CTR", 1);
CStatement ctrAss = new CStatement(CStatement.Kinds.Assignment, "CTR", ctrSub);
stats.Add(ctrAss);
}
CStatement final = ConditionCheck(i);
CStatement branch = new CStatement();
if (i.LK())
{
branch.Kind = CStatement.Kinds.Assignment;
branch.Op1 = new CStatement.COperand("r3");
CStatement realBranch = new CStatement(CStatement.Kinds.Call);
realBranch.CallFuncName = "lr";
realBranch.BranchDestinationRegister = "lr";
branch.Op2 = new CStatement.COperand(realBranch);
}
else
branch.Kind = CStatement.Kinds.Return;
if (final == null)
final = branch;
else
{
final.InnerBlock = new List<CStatement>();
final.InnerBlock.Add(branch);
}
stats.Add(final);
return stats;
}
static List<CStatement> Bc_C(uint pc, uint instruction)
{
Instruction i = new Instruction(instruction);
List<CStatement> stats = new List<CStatement>();
if ((i.BO() & 4) == 0)
{
CStatement ctrSub = new CStatement(CStatement.Kinds.Subtraction, "CTR", 1);
CStatement ctrAss = new CStatement(CStatement.Kinds.Assignment, "CTR", ctrSub);
stats.Add(ctrAss);
}
CStatement final = ConditionCheck(i);
uint destination = (uint)(int)(short)(i.BD() << 2);
if ((instruction & 2) != 2)
destination += pc;
Function f = decompiler.Functions.Find(delegate(Function fn) { return fn.Address == destination; });
String destName;
if (f != null)
destName = f.Name;
else
destName = "L" + destination.ToString("X8");
CStatement branch = new CStatement();
if (i.LK())
{
if (f != null && decompiler.IgnoredCalls.Contains(f))
return new List<CStatement>();
if (f != null && f.Returns.Name == "void" && f.Returns.Kind == CType.TypeKind.ValueType)
{
branch.Kind = CStatement.Kinds.Call;
branch.CallFuncName = destName;
branch.CalledFunction = f;
}
else
{
branch.Kind = CStatement.Kinds.Assignment;
branch.Op1 = new CStatement.COperand("r3");
CStatement realBranch = new CStatement(CStatement.Kinds.Call);
realBranch.CallFuncName = destName;
realBranch.CalledFunction = f;
branch.Op2 = new CStatement.COperand(realBranch);
}
}
else
{
if (f != null && decompiler.CallIsRet.Contains(f))
branch.Kind = CStatement.Kinds.Return;
else
{
branch.Kind = CStatement.Kinds.Goto;
branch.BranchDestination = destName;
branch.BranchDestinationAddr = destination;
}
}
if (final == null)
final = branch;
else
{
final.InnerBlock = new List<CStatement>();
final.InnerBlock.Add(branch);
}
stats.Add(final);
return stats;
}
private static CStatement ConditionCheck(Instruction i)
{
CStatement CtrCondition = null;
CStatement CrCondition = null;
if ((i.BO() & 4) == 0)
{
CtrCondition = new CStatement();
}
if ((i.BO() & 0x10) == 0)
{
CrCondition = new CStatement();
CrCondition.Kind = CStatement.Kinds.Comparison;
uint cr = i.BI() / 4;
uint fld = i.BI() % 4;
CrCondition.Op1 = new CStatement.COperand("cr" + cr);
CrCondition.Op2 = new CStatement.COperand(0);
bool bo = ((i.BO() >> 3) & 1) == 1;
switch (fld)
{
case 0:
if (bo)
CrCondition.ConditionSign = CStatement.Conditions.LessThan;
else
CrCondition.ConditionSign = CStatement.Conditions.GreaterEqualThan;
break;
case 1:
if (bo)
CrCondition.ConditionSign = CStatement.Conditions.GreaterThan;
else
CrCondition.ConditionSign = CStatement.Conditions.LessEqualThan;
break;
case 2:
if (bo)
CrCondition.ConditionSign = CStatement.Conditions.Equal;
else
CrCondition.ConditionSign = CStatement.Conditions.NotEqual;
break;
case 3:
if (bo)
CrCondition.ConditionSign = CStatement.Conditions.Overflow;
else
CrCondition.ConditionSign = CStatement.Conditions.NotOverflow;
break;
}
}
CStatement final = null;
if (CrCondition != null)
{
if (CtrCondition != null)
{
CStatement composite = new CStatement(CStatement.Kinds.CompositeCondition, CrCondition, CtrCondition);
composite.ConditionSign = CStatement.Conditions.And;
final = new CStatement();
final.Kind = CStatement.Kinds.Conditional;
final.Condition = composite;
}
else
{
final = new CStatement();
final.Kind = CStatement.Kinds.Conditional;
final.Condition = CrCondition;
}
}
else if (CtrCondition != null)
{
final = new CStatement();
final.Kind = CStatement.Kinds.Conditional;
final.Condition = CtrCondition;
}
return final;
}