added state initialisers #374
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note it's not presently clear how using cuStateVec's Accessor functionality (for modifying amplitudes) is compares (performance-wise) to direct CUDA writes (like memcpy). So far, we have avoided using cuStateVec's Accessor functions to be explicit about, and fully aware of, the involved temporary memory
It's likely that initialisations statevec_setWeightedQureg(), statevec_initStateOfSingleQubit() (and potentially the substantially more complicated densmatr_initPureState()) can also be done concisely with Thrust. Alas, my evening was derailed by the stream-ordered memory pool tanking for >=1 MiB allocs :(
and a patch to a previous issue in our use of thrust, where we were defining complex operator overloads as (implicitly) host-only
although we are missing imports to avoid git conflict: # include <thrust/sequence.h> # include <thrust/iterator/zip_iterator.h> # include <thrust/for_each.h>
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