Function _selectUnitProc

source/backend/cpu/CPURaster.cpp:175–205

}

static BlitProc _selectUnitProc(int bytes, int stride, int ds) {
    auto core = MNNGetCoreFunctions();
    auto proc = core->MNN1BitcopyFast;
    switch (bytes) {
        case 4:
            if (ds == 1 && (stride == 1 || stride == 0)) {
                proc = core->MNN4BitcopyFast;
            } else {
                proc = core->MNN4BitcopyWithStride;
            }
            break;
        case 2:
            if (ds == 1 && (stride == 1 || stride == 0)) {
                proc = core->MNN2BitcopyFast;
            } else {
                proc = core->MNN2BitcopyWithStride;
            }
            break;
        case 1:
            if (ds == 1 && (stride == 1 || stride == 0)) {
                proc = core->MNN1BitcopyFast;
            } else {
                proc = core->MNN1BitcopyWithStride;
            }
            break;
        default:
            MNN_ASSERT(false);
            break;
    }
    return proc;
}
static void _zero(const Tensor::InsideDescribe::Region& slice, int bytes, uint8_t* dstPtr) {
    for (int z=0; z<slice.size[0]; ++z) {
        auto dstZ = dstPtr + (z) * slice.dst.stride[0] * bytes;