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43 lines
1.5 KiB
Plaintext
43 lines
1.5 KiB
Plaintext
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD+Patents license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#pragma once
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#include "../utils/Tensor.cuh"
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#include "../utils/NoTypeTensor.cuh"
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#include <cublas_v2.h>
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namespace faiss { namespace gpu {
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class DeviceMemory;
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/// pqCentroids is of the form (sub q)(sub dim)(code id)
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/// Calculates the distance from the (query - centroid) residual to
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/// each sub-code vector, for the given list of query results in
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/// topQueryToCentroid
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void runPQCodeDistances(Tensor<float, 3, true>& pqCentroids,
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Tensor<float, 2, true>& queries,
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Tensor<float, 2, true>& coarseCentroids,
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Tensor<int, 2, true>& topQueryToCentroid,
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NoTypeTensor<4, true>& outCodeDistances,
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bool useFloat16Lookup,
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cudaStream_t stream);
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void runPQCodeDistancesMM(Tensor<float, 3, true>& pqCentroids,
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Tensor<float, 2, true>& queries,
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Tensor<float, 2, true>& coarseCentroids,
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Tensor<int, 2, true>& topQueryToCentroid,
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NoTypeTensor<4, true>& outCodeDistances,
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bool useFloat16Lookup,
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DeviceMemory& mem,
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cublasHandle_t handle,
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cudaStream_t stream);
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} } // namespace
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