/*
//@HEADER
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//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
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#ifndef KOKKOS_ROCM_HPP
#define KOKKOS_ROCM_HPP

#include <Kokkos_Core_fwd.hpp>

#if defined( KOKKOS_ENABLE_ROCM )

class dim3 {
public:
int x,y,z;
dim3(int _x, int _y, int _z):x(_x),y(_y),z(_z) {};
};

#include <ROCm/hc_math_std.hpp>
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------

#include <cstddef>
#include <iosfwd>
#include <Kokkos_HostSpace.hpp>
#include <Kokkos_ROCmSpace.hpp>
#include <ROCm/Kokkos_ROCm_Exec.hpp>
#include <Kokkos_ScratchSpace.hpp>
#include <Kokkos_Parallel.hpp>
#include <Kokkos_Layout.hpp>
#include <impl/Kokkos_Tags.hpp>

/*--------------------------------------------------------------------------*/

#include <hc.hpp>
#include <hc_am.hpp>
#include <amp_math.h>

#if defined( __HCC_ACCELERATOR__ )

using namespace ::Concurrency::precise_math ;

#endif

/*--------------------------------------------------------------------------*/

namespace Kokkos {
namespace Impl {
class ROCmExec ;
} // namespace Impl
} // namespace Kokkos

/*--------------------------------------------------------------------------*/

namespace Kokkos {
namespace Experimental {
/// \class ROCm
/// \brief Kokkos device for multicore processors in the host memory space.
class ROCm {
public:
  //------------------------------------
  //! \name Type declarations that all Kokkos devices must provide.
  //@{

  //! Tag this class as a kokkos execution space
  typedef ROCm                  execution_space ;
  typedef ROCmSpace             memory_space ;
  typedef Kokkos::Device<execution_space,memory_space> device_type;

  typedef LayoutLeft            array_layout ;
  typedef HostSpace::size_type  size_type ;

  typedef ScratchMemorySpace< ROCm > scratch_memory_space ;

  ~ROCm() {}
  ROCm();
//  explicit ROCm( const int instance_id );

  ROCm( ROCm && ) = default ;
  ROCm( const ROCm & ) = default ;
  ROCm & operator = ( ROCm && ) = default ;
  ROCm & operator = ( const ROCm & ) = default ;


  //@}
  //------------------------------------
  //! \name Functions that all Kokkos devices must implement.
  //@{

  KOKKOS_INLINE_FUNCTION static int in_parallel() {
#if defined( __HCC_ACCELERATOR__ )
    return true;
#else
    return false;
#endif
  }

  /** \brief  Set the device in a "sleep" state. */
  static bool sleep() ;

  /** \brief Wake the device from the 'sleep' state. A noop for OpenMP. */
  static bool wake() ;

  /** \brief Wait until all dispatched functors complete. A noop for OpenMP. */
  static void impl_static_fence();

  #ifdef KOKKOS_ENABLE_DEPRECATED_CODE
  static void fence();
  #else
  void fence() const;
  #endif


  /// \brief Print configuration information to the given output stream.
  static void print_configuration( std::ostream & , const bool detail = false );

  /// \brief Free any resources being consumed by the device.
  static void finalize() ;

  /** \brief  Initialize the device.
   *
   */
  struct SelectDevice {
    int rocm_device_id ;
    SelectDevice() : rocm_device_id(1) {}
    explicit SelectDevice( int id ) : rocm_device_id( id+1 ) {}
  };

  int          rocm_device() const { return m_device ; }
  bool         isAPU();
  bool         isAPU(int device);

  static void initialize( const SelectDevice = SelectDevice());

  static int is_initialized();

//  static size_type device_arch();

//  static size_type detect_device_count();


  static int concurrency() ;
  static const char* name();
private:
  int          m_device ;

};
}
} // namespace Kokkos

namespace Kokkos {
namespace Impl {

template<>
struct MemorySpaceAccess
  < Kokkos::Experimental::ROCmSpace
  , Kokkos::Experimental::ROCm::scratch_memory_space
  >
{
  enum { assignable = false };
  enum { accessible = true };
  enum { deepcopy   = false };
};

template<>
struct VerifyExecutionCanAccessMemorySpace
  < Kokkos::Experimental::ROCm::memory_space
  , Kokkos::Experimental::ROCm::scratch_memory_space
  >
{
  enum { value = true };
  KOKKOS_INLINE_FUNCTION static void verify( void ) { }
  KOKKOS_INLINE_FUNCTION static void verify( const void * ) { }
};

template<>
struct VerifyExecutionCanAccessMemorySpace
  < Kokkos::HostSpace
  , Kokkos::Experimental::ROCm::scratch_memory_space
  >
{
  enum { value = false };
  inline static void verify( void ) { Kokkos::Experimental::ROCmSpace::access_error(); }
  inline static void verify( const void * p ) { Kokkos::Experimental::ROCmSpace::access_error(p); }
};

} // namespace Experimental
} // namespace Kokkos





#define threadIdx_x (hc_get_workitem_id(0))
#define threadIdx_y (hc_get_workitem_id(1))
#define threadIdx_z (hc_get_workitem_id(2))

#define blockIdx_x  (hc_get_group_id(0))
#define blockIdx_y  (hc_get_group_id(1))
#define blockIdx_z  (hc_get_group_id(2))

#define blockDim_x  (hc_get_group_size(0))
#define blockDim_y  (hc_get_group_size(1))
#define blockDim_z  (hc_get_group_size(2))

#define gridDim_x   (hc_get_num_groups(0))
#define gridDim_y   (hc_get_num_groups(1))
#define gridDim_z   (hc_get_num_groups(2))


#include <ROCm/Kokkos_ROCm_Parallel.hpp>
#include <ROCm/Kokkos_ROCm_Task.hpp>

#endif
#endif


