public void OnPrimitiveOperation(int id, object[] qubitsTraceData, double primitiveOperationDuration)
{
IEnumerable <QubitTimeMetrics> qubitsMetrics = qubitsTraceData.Cast <QubitTimeMetrics>();
if (optimizeDepth)
{
// When we optimize for depth we may need to adjust qubit start times in addition to qubit end times.
if (qubitsTraceData.Length == 1)
{
// Single qubit gate always advances end time by operation duration
// in case qubit is fixed or not fixed in time.
((QubitTimeMetrics)qubitsTraceData[0]).EndTime =
((QubitTimeMetrics)qubitsTraceData[0]).EndTime.AdvanceBy(primitiveOperationDuration);
}
else
{
// Multi-qubit gate fixes all qubits in time and advances end time
// First, figure out what time it is. It's max over fixed and not fixed times.
ComplexTime maxEndTime = ComplexTime.Zero;
foreach (QubitTimeMetrics q in qubitsMetrics)
{
maxEndTime = ComplexTime.Max(maxEndTime, q.EndTime);
}
// Now we fix qubits that are not yet fixed by adjusting their start time.
// And adjust end time for all qubits involved.
foreach (QubitTimeMetrics q in qubitsMetrics)
{
if (q.StartTime.IsEqualTo(ComplexTime.MinValue))
{
q.StartTime = maxEndTime.Subtract(q.EndTime);
}
q.EndTime = maxEndTime.AdvanceBy(primitiveOperationDuration);
}
}
}
else
{
// When we don't optimize for depth we use max availability time
// as gate execution time and then adjust availability time of qubits involved
double startTime = MaxAvailableTime(qubitsMetrics);
foreach (QubitTimeMetrics q in qubitsMetrics)
{
qubitAvailabilityTime[q.QubitId] = startTime + primitiveOperationDuration;
}
}
}
/// <summary>
/// Compares Time field of two nodes. Also updates MaxLowerBound and MinUpperBound.
/// </summary>
/// <returns>Result of comparison of Time field of QubitTimeNode</returns>
public int Compare(QubitTimeNode a, QubitTimeNode b)
{
// Note that comparison of a and b nodes to Sample is "by reference" in this function.
int result = ComplexTime.Compare(a.Time, b.Time);
if (result > 0)
{
if (a == Sample && b != Sample)
{
MaxLowerBound = ComplexTime.Max(MaxLowerBound, b.Time);
}
else if (a != Sample && b == Sample)
{
MinUpperBound = ComplexTime.Min(MinUpperBound, a.Time);
}
}
else if (result < 0)
{
if (a == Sample && b != Sample)
{
MinUpperBound = ComplexTime.Min(MinUpperBound, b.Time);
}
else if (a != Sample && b == Sample)
{
MaxLowerBound = ComplexTime.Max(MaxLowerBound, a.Time);
}
}
else
{
// We found the value if one argument is the sample and the other is not.
if ((a == Sample) != (b == Sample))
{
MaxLowerBound = b.Time;
MinUpperBound = b.Time;
}
}
return(result);
}