Function applyMultiStateControlledSwap

quest/src/api/operations.cpp:676–692

}

void applyMultiStateControlledSwap(Qureg qureg, int* controls, int* states, int numControls, int qubit1, int qubit2) {
    validate_quregFields(qureg, __func__);
    validate_controlsAndTwoTargets(qureg, controls, numControls, qubit1, qubit2, __func__);
    validate_controlStates(states, numControls, __func__); // permits states==nullptr

    auto ctrlVec = util_getVector(controls, numControls);
    auto stateVec = util_getVector(states, numControls); // empty if states==nullptr
    localiser_statevec_anyCtrlSwap(qureg, ctrlVec, stateVec, qubit1, qubit2);

    if (!qureg.isDensityMatrix)
        return;

    ctrlVec = util_getBraQubits(ctrlVec, qureg);
    qubit1 = util_getBraQubit(qubit1, qureg);
    qubit2 = util_getBraQubit(qubit2, qureg);
    localiser_statevec_anyCtrlSwap(qureg, ctrlVec, stateVec, qubit1, qubit2);
}

} // end de-mangler