Function localiser_fullstatediagmatr_setElems

quest/src/core/localiser.cpp:652–669

void localiser_fullstatediagmatr_setElems(FullStateDiagMatr matr, qindex startInd, qcomp* in, qindex numElems) {

    // modification of a FullStateDiagMatr is identical to that of a 
    // statevector Qureg, so we spoof an identically-deployed Qureg
    Qureg spoof = getSpoofedBufferlessQuregFromFullStateDiagMatr(matr);

    // invoke the Qureg setter, which will modify matr's memory
    localiser_statevec_setAmps(in, spoof, startInd, numElems);

    // note that FullStateDiagMatr needs its CPU and GPU memories
    // to always be consistent with one another (like all matrix
    // types), since this is a precondition assumed by accelerator.cpp.
    // So if the above function modified GPU mem, we also trigger CPU.
    if (spoof.isGpuAccelerated) {
        spoof.isGpuAccelerated = 0;
        localiser_statevec_setAmps(in, spoof, startInd, numElems);
    }
}


void localiser_fullstatediagmatr_setElemsToPauliStrSum(FullStateDiagMatr out, PauliStrSum in) {