#include "hip/hip_runtime.h"
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/*! \file
    \brief Template for generic HYTLASS kernel.
*/

#pragma once

#if defined(__HIP_DEVICE_COMPILE__) && !defined(__HIPCC__)
#  define HYTLASS_GRID_CONSTANT_ENABLED
#endif

#if ! defined(HYTLASS_GRID_CONSTANT)
#  if defined(HYTLASS_GRID_CONSTANT_ENABLED)
#    define HYTLASS_GRID_CONSTANT __grid_constant__
#  else
#    define HYTLASS_GRID_CONSTANT
#  endif
#endif

////////////////////////////////////////////////////////////////////////////////

namespace hytlass {

////////////////////////////////////////////////////////////////////////////////


template<typename Operator, typename=void>
struct GetThreadCount {
    static constexpr unsigned value = 1024;
};
template<typename Operator>
struct GetThreadCount<Operator, std::void_t<decltype(Operator::kThreadCount)>> {
    static constexpr unsigned value = Operator::kThreadCount;
};

/// Generic HYTLASS kernel template.
template <typename Operator>
HYTLASS_GLOBAL
#ifdef __HIPCC__
__launch_bounds__(GetThreadCount<Operator>::value)
#endif
void Kernel(typename Operator::Params params) {
  // Dynamic shared memory base pointer
  extern __shared__ int SharedStorageBase[];
  // Declare pointer to dynamic shared memory.
  typename Operator::SharedStorage *shared_storage =
      reinterpret_cast<typename Operator::SharedStorage *>(SharedStorageBase);

  Operator op;

  op(params, *shared_storage);
}


/// Generic HYTLASS kernel template.
template <typename Operator>
HYTLASS_GLOBAL
#ifdef __HIPCC__
__launch_bounds__(GetThreadCount<Operator>::value)
#endif
void Kernel2(typename Operator::Params params) {
  // Dynamic shared memory base pointer
  extern __shared__ int SharedStorageBase[];
  // Declare pointer to dynamic shared memory.
  typename Operator::SharedStorage *shared_storage =
      reinterpret_cast<typename Operator::SharedStorage *>(SharedStorageBase);

  Operator::invoke(params, *shared_storage);
}


////////////////////////////////////////////////////////////////////////////////
//
// 3.0 specific launch
//
////////////////////////////////////////////////////////////////////////////////

/// Generic HYTLASS kernel template.
template <typename Operator>
HYTLASS_GLOBAL
#ifdef __HIPCC__
// Enclosing this in __HIPCC__ suppresses MSVC warnings.
__launch_bounds__(Operator::MaxThreadsPerBlock, Operator::MinBlocksPerMultiprocessor)
#endif // __HIPCC__
void device_kernel(HYTLASS_GRID_CONSTANT typename Operator::Params const params)
{
  // Dynamic shared memory base pointer
  extern __shared__ char smem[];
  Operator op;
  op(params, smem);
}

////////////////////////////////////////////////////////////////////////////////
} /// namespace hytlass
