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PQScanMultiPassNoPrecomputed.cuh
1 /**
2  * Copyright (c) 2015-present, Facebook, Inc.
3  * All rights reserved.
4  *
5  * This source code is licensed under the BSD+Patents license found in the
6  * LICENSE file in the root directory of this source tree.
7  */
8 
9 
10 #pragma once
11 
12 #include "../GpuIndicesOptions.h"
13 #include "../utils/Tensor.cuh"
14 #include <thrust/device_vector.h>
15 
16 namespace faiss { namespace gpu {
17 
18 class GpuResources;
19 
20 /// For no precomputed codes, is this a supported number of dimensions
21 /// per subquantizer?
22 bool isSupportedNoPrecomputedSubDimSize(int dims);
23 
24 void runPQScanMultiPassNoPrecomputed(Tensor<float, 2, true>& queries,
25  Tensor<float, 2, true>& centroids,
26  Tensor<float, 3, true>& pqCentroidsInnermostCode,
27  Tensor<int, 2, true>& topQueryToCentroid,
28  bool useFloat16Lookup,
29  int bytesPerCode,
30  int numSubQuantizers,
31  int numSubQuantizerCodes,
32  thrust::device_vector<void*>& listCodes,
33  thrust::device_vector<void*>& listIndices,
34  IndicesOptions indicesOptions,
35  thrust::device_vector<int>& listLengths,
36  int maxListLength,
37  int k,
38  // output
39  Tensor<float, 2, true>& outDistances,
40  // output
41  Tensor<long, 2, true>& outIndices,
42  GpuResources* res);
43 
44 } } // namespace