Function localiser_statevec_setAmps

quest/src/core/localiser.cpp:592–610

void localiser_statevec_setAmps(qcomp* inAmps, Qureg qureg, qindex globalStartInd, qindex globalNumAmps) {

    // we do not assert Qureg is a state-vector, since the 
    // density matrix routine leverages this function

    // always embarrassingly parallel, since inAmps is duplicated on every node;
    // nodes simply determine which amps overlap their partition, and use them

    if (!qureg.isDistributed) {
        accel_statevec_setAmps_sub(inAmps, qureg, globalStartInd, globalNumAmps);
        return;
    }

    if (!util_areAnyVectorElemsWithinNode(qureg.rank, qureg.numAmpsPerNode, globalStartInd, globalNumAmps))
        return;

    auto range = util_getLocalIndRangeOfVectorElemsWithinNode(qureg.rank, qureg.numAmpsPerNode, globalStartInd, globalNumAmps);
    accel_statevec_setAmps_sub(&inAmps[range.localDuplicStartInd], qureg, range.localDistribStartInd, range.numElems);
}


void localiser_densmatr_setAmps(qcomp** inAmps, Qureg qureg, qindex startRow, qindex startCol, qindex numRows, qindex numCols) {