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Comparators.cuh
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the CC-by-NC license found in the
* LICENSE file in the root directory of this source tree.
*/
// Copyright 2004-present Facebook. All Rights Reserved.
#pragma once
#include <cuda.h>
#include "Float16.cuh"
namespace faiss { namespace gpu {
template <typename T>
struct Comparator {
__device__ static inline bool lt(T a, T b) {
return a < b;
}
__device__ static inline bool gt(T a, T b) {
return a > b;
}
};
#ifdef FAISS_USE_FLOAT16
template <>
struct Comparator<half> {
__device__ static inline bool lt(half a, half b) {
#if FAISS_USE_FULL_FLOAT16
return __hlt(a, b);
#else
return __half2float(a) < __half2float(b);
#endif // FAISS_USE_FULL_FLOAT16
}
__device__ static inline bool gt(half a, half b) {
#if FAISS_USE_FULL_FLOAT16
return __hgt(a, b);
#else
return __half2float(a) > __half2float(b);
#endif // FAISS_USE_FULL_FLOAT16
}
};
#endif // FAISS_USE_FLOAT16
} } // namespace
faiss::gpu::Comparator
Definition: Comparators.cuh:20