/*
* The MIT License (MIT)
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* Copyright (c) 2015-2022 Advanced Micro Devices, Inc. All rights reserved.
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* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
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#ifndef MIGRAPHX_GUARD_KERNELS_CK_GEMM_HPP
#define MIGRAPHX_GUARD_KERNELS_CK_GEMM_HPP

#include <migraphx/kernels/index.hpp>
#include <migraphx/kernels/algorithm.hpp>
#include <migraphx/kernels/integral_constant.hpp>
#include <migraphx/kernels/tensor_view.hpp>
#include <migraphx/kernels/ck.hpp>
#include <migraphx/kernels/gemm_batcher.hpp>

namespace migraphx {

// In CK, the B matrix is ordered as N,K instead of K,N
template <class Dims>
constexpr auto ck_transposeb_dims(Dims dims)
{
   return unpack(dims, [](auto k, auto n) { return make_const_array(n, k); });
}

template <class Tensor>
using ck_transposeb = decltype(make_shape(ck_transposeb_dims(get_shape_c<Tensor>{}.lens),
                                         ck_transposeb_dims(get_shape_c<Tensor>{}.strides)));

using clock_value_t = long long;

__device__ void sleep(clock_value_t sleep_cycles)
{
   clock_value_t start = clock64();
   clock_value_t cycles_elapsed;
   do { cycles_elapsed = clock64() - start; }
   while (cycles_elapsed < sleep_cycles);
}

template <class G, class E, class A, class B, class... Ds>
__device__ void ck_gemm_matrix(E e, A a, B b, Ds... ds)
{
   constexpr auto desc = G::make_descriptor(to_ck_tensor<A>(),
                                            to_ck_tensor<ck_transposeb<B>>(),
                                            ck::make_tuple(to_ck_tensor<Ds>()...),
                                            to_ck_tensor<E>());

   //static_assert(desc.is_valid, "Invalid ck gemm.");
   if constexpr(not desc.is_valid)
   {
       sleep(10000000);
       return;
   }
   G::Run(desc,
          to_ck_const_pointer(a.data()),
          to_ck_const_pointer(b.data()),
          ck::make_tuple(to_ck_const_pointer(ds.data())...),
          to_ck_pointer(e.data()));
}

template <class G, index_int BlocksPerBatch, class... Ts>
__device__ void ck_gemm(Ts... xs)
{
   gemm_batch_args(make_index(), _c<BlocksPerBatch>, xs...)(
       [](auto... ys) { ck_gemm_matrix<G>(ys...); });
}

} // namespace migraphx
#endif

 
