public IEnumerable <IXILMapping> TryMap(ITransactionSite taSite, XILInstr instr, TypeDescriptor[] operandTypes, TypeDescriptor[] resultTypes)
{
var fu = taSite.Host;
BCU bcu = fu as BCU;
if (bcu != _host)
{
yield break;
}
switch (instr.Name)
{
case InstructionCodes.Goto:
case InstructionCodes.BranchIfTrue:
case InstructionCodes.BranchIfFalse:
{
var target = (BranchLabel)instr.Operand;
switch (instr.Name)
{
case InstructionCodes.Goto:
yield return(new GotoMapping(bcu, target));
yield break;
case InstructionCodes.BranchIfTrue:
yield return(new BranchIfMapping(bcu, target));
yield break;
case InstructionCodes.BranchIfFalse:
yield return(new BranchIfNotMapping(bcu, target));
yield break;
default:
throw new NotImplementedException();
}
}
default:
yield break;
}
}
public BCUMapping(BCU bcu, BranchLabel target)
{
_bcu = bcu;
_target = target;
}
public BCUTransactionSite(BCU host) :
base(host)
{
_host = host;
}
/// <summary>
/// Constructs an instance
/// </summary>
/// <param name="host">the branch control unit</param>
/// <param name="latency">desired latency</param>
public BCUMapper(BCU host, int latency = 1)
{
_host = host;
_latency = latency;
}
public BranchIfNotMapping(BCU bcu, BranchLabel target) :
base(bcu, target)
{
}
public GotoMapping(BCU bcu, BranchLabel target) :
base(bcu, target)
{
}