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eigen/unsupported/Eigen/CXX11/src/Tensor/TensorMacros.h
Deven Desai b6cc0961b1 updates based on PR feedback
There are two major changes (and a few minor ones which are not listed here...see PR discussion for details)

1. Eigen::half implementations for HIP and CUDA have been merged.
This means that
- `CUDA/Half.h` and `HIP/hcc/Half.h` got merged to a new file `GPU/Half.h`
- `CUDA/PacketMathHalf.h` and `HIP/hcc/PacketMathHalf.h` got merged to a new file `GPU/PacketMathHalf.h`
- `CUDA/TypeCasting.h` and `HIP/hcc/TypeCasting.h` got merged to a new file `GPU/TypeCasting.h`

After this change the `HIP/hcc` directory only contains one file `math_constants.h`. That will go away too once that file becomes a part of the HIP install.

2. new macros EIGEN_GPUCC, EIGEN_GPU_COMPILE_PHASE and EIGEN_HAS_GPU_FP16 have been added and the code has been updated to use them where appropriate.
- `EIGEN_GPUCC` is the same as `(EIGEN_CUDACC || EIGEN_HIPCC)`
- `EIGEN_GPU_DEVICE_COMPILE` is the same as `(EIGEN_CUDA_ARCH || EIGEN_HIP_DEVICE_COMPILE)`
- `EIGEN_HAS_GPU_FP16` is the same as `(EIGEN_HAS_CUDA_FP16 or EIGEN_HAS_HIP_FP16)`
2018-06-14 10:21:54 -04:00

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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2015 Benoit Steiner <benoit.steiner.goog@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef EIGEN_CXX11_TENSOR_TENSOR_META_MACROS_H
#define EIGEN_CXX11_TENSOR_TENSOR_META_MACROS_H
/** use this macro in sfinae selection in templated functions
*
* template<typename T,
* typename std::enable_if< isBanana<T>::value , int >::type = 0
* >
* void foo(){}
*
* becomes =>
*
* template<typename TopoType,
* SFINAE_ENABLE_IF( isBanana<T>::value )
* >
* void foo(){}
*/
// SFINAE requires variadic templates
#if !defined(EIGEN_GPUCC)
#if EIGEN_HAS_VARIADIC_TEMPLATES
// SFINAE doesn't work for gcc <= 4.7
#ifdef EIGEN_COMP_GNUC
#if EIGEN_GNUC_AT_LEAST(4,8)
#define EIGEN_HAS_SFINAE
#endif
#else
#define EIGEN_HAS_SFINAE
#endif
#endif
#endif
#define EIGEN_SFINAE_ENABLE_IF( __condition__ ) \
typename internal::enable_if< ( __condition__ ) , int >::type = 0
#if EIGEN_HAS_CONSTEXPR
#define EIGEN_CONSTEXPR constexpr
#else
#define EIGEN_CONSTEXPR
#endif
#if EIGEN_OS_WIN || EIGEN_OS_WIN64
#define EIGEN_SLEEP(n) Sleep(n)
#elif EIGEN_OS_GNULINUX
#define EIGEN_SLEEP(n) usleep(n * 1000);
#else
#define EIGEN_SLEEP(n) sleep(std::max<unsigned>(1, n/1000))
#endif
#endif