Function accel_statevec_setAmps_sub

quest/src/core/accelerator.cpp:205–217

void accel_statevec_setAmps_sub(qcomp* inAmps, Qureg qureg, qindex localStartInd, qindex numLocalAmps) {

    // in CPU settings, we use memory-copying rather than OpenMP
    // loop updating, because the latter is only faster when carefully
    // optimising parallelisation granularity with the memory
    // architecture, which we cannot reliably do in a platform
    // agnostic way (except via hwloc or something)

    // copy directly from inAmps to GPU/CPU
    (qureg.isGpuAccelerated)?
        gpu_copyCpuToGpu(inAmps, &qureg.gpuAmps[localStartInd], numLocalAmps): // (src, dest) = (cpu, gpu)
        cpu_copyArray(   &qureg.cpuAmps[localStartInd], inAmps, numLocalAmps); // (dest, src)
}


void accel_densmatr_setAmpsToPauliStrSum_sub(Qureg qureg, PauliStrSum sum) {