74 lines
2.7 KiB
Plaintext
74 lines
2.7 KiB
Plaintext
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/**
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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 CC-by-NC 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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// Copyright 2004-present Facebook. All Rights Reserved.
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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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// 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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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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// Hint to use a different sized tile for
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// multi-streaming the queries. If <= 0, we use the
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// default (256)
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int tileSize = -1);
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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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Tensor<float, 2, true>& queries,
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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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// Hint to use a different sized tile for
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// multi-streaming the queries. If <= 0, we use the
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// default (256)
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int tileSize = -1);
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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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Tensor<half, 2, true>& queries,
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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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int tileSize = -1);
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void runL2Distance(GpuResources* resources,
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Tensor<half, 2, true>& vectors,
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Tensor<half, 1, true>* vectorNorms,
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Tensor<half, 2, true>& queries,
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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 ignoreOutDistances = false,
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int tileSize = -1);
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#endif
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} } // namespace
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