71 lines
2.5 KiB
Plaintext
71 lines
2.5 KiB
Plaintext
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT 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/DeviceTensor.cuh"
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#include "../utils/Float16.cuh"
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namespace faiss { namespace gpu {
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class GpuResources;
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/// Calculates brute-force L2 distance between `vectors` and
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/// `queries`, returning the k closest results seen
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void runL2Distance(GpuResources* resources,
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Tensor<float, 2, true>& vectors,
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bool vectorsRowMajor,
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// can be optionally pre-computed; nullptr if we
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// have to compute it upon the call
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Tensor<float, 1, true>* vectorNorms,
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Tensor<float, 2, true>& queries,
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bool queriesRowMajor,
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int k,
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Tensor<float, 2, true>& outDistances,
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Tensor<int, 2, true>& outIndices,
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// Do we care about `outDistances`? If not, we can
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// take shortcuts.
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bool ignoreOutDistances = false);
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/// Calculates brute-force inner product distance between `vectors`
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/// and `queries`, returning the k closest results seen
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void runIPDistance(GpuResources* resources,
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Tensor<float, 2, true>& vectors,
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bool vectorsRowMajor,
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Tensor<float, 2, true>& queries,
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bool queriesRowMajor,
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int k,
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Tensor<float, 2, true>& outDistances,
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Tensor<int, 2, true>& outIndices);
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#ifdef FAISS_USE_FLOAT16
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void runIPDistance(GpuResources* resources,
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Tensor<half, 2, true>& vectors,
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bool vectorsRowMajor,
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Tensor<half, 2, true>& queries,
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bool queriesRowMajor,
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int k,
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Tensor<half, 2, true>& outDistances,
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Tensor<int, 2, true>& outIndices,
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bool useHgemm);
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void runL2Distance(GpuResources* resources,
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Tensor<half, 2, true>& vectors,
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bool vectorsRowMajor,
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Tensor<half, 1, true>* vectorNorms,
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Tensor<half, 2, true>& queries,
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bool queriesRowMajor,
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int k,
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Tensor<half, 2, true>& outDistances,
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Tensor<int, 2, true>& outIndices,
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bool useHgemm,
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bool ignoreOutDistances = false);
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#endif
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} } // namespace
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