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PQCodeDistances.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 // Copyright 2004-present Facebook. All Rights Reserved.
10
11 #pragma once
12
13 #include "../utils/Tensor.cuh"
14 #include "../utils/NoTypeTensor.cuh"
15 #include <cublas_v2.h>
16
17 namespace faiss { namespace gpu {
18
19 class DeviceMemory;
20
21 /// pqCentroids is of the form (sub q)(sub dim)(code id)
22 /// Calculates the distance from the (query - centroid) residual to
23 /// each sub-code vector, for the given list of query results in
24 /// topQueryToCentroid
25 void runPQCodeDistances(Tensor<float, 3, true>& pqCentroids,
26 Tensor<float, 2, true>& queries,
27 Tensor<float, 2, true>& coarseCentroids,
28 Tensor<int, 2, true>& topQueryToCentroid,
29 NoTypeTensor<4, true>& outCodeDistances,
30 bool useFloat16Lookup,
31 cudaStream_t stream);
32
33 void runPQCodeDistancesMM(Tensor<float, 3, true>& pqCentroids,
34 Tensor<float, 2, true>& queries,
35 Tensor<float, 2, true>& coarseCentroids,
36 Tensor<int, 2, true>& topQueryToCentroid,
37 NoTypeTensor<4, true>& outCodeDistances,
38 bool useFloat16Lookup,
39 DeviceMemory& mem,
40 cublasHandle_t handle,
41 cudaStream_t stream);
42
43 } } // namespace