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/*! \file
    \brief Tests for device-wide GEMM interface
*/

#include <iostream>

#include "cutlass/cutlass.h"
#include "cutlass/functional.h"

#include "cutlass/gemm/kernel/default_gemm_with_reduction.h"
#include "cutlass/gemm/device/gemm_universal_adapter.h"

#include "cutlass/epilogue/thread/linear_combination_drelu.h"
#include "cutlass/epilogue/thread/linear_combination_dgelu.h"

#include "../../common/cutlass_unit_test.h"

#include "cutlass/util/host_tensor.h"
#include "cutlass/util/tensor_view_io.h"
#include "cutlass/util/reference/host/tensor_fill.h"
#include "cutlass/util/reference/host/tensor_copy.h"
#include "cutlass/util/reference/host/tensor_compare.h"
#include "cutlass/util/reference/host/gemm.h"

#include "testbed_gemm_with_reduction.h"

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

#if defined(CUTLASS_ARCH_MMA_SM80_SUPPORTED)

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

struct dReluLambda {
  float operator()(float d_y, float t) {
    if (t <= 0) {
      d_y = 0;
    }
    return d_y;
  }
};

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

TEST(SM80_Device_GemmWithReduction_dReLU_bGrad_f16t_f16n_f16n_tensor_op_f32, 128x128x32_64x64x32) {
  
  using EpilogueOutputOp = cutlass::epilogue::thread::LinearCombinationDRelu<
    float,
    float,
    cutlass::half_t,
    cutlass::half_t,
    8
  >;

  using GemmKernel = 
    typename cutlass::gemm::kernel::DefaultGemmWithReduction<
      cutlass::half_t, cutlass::layout::RowMajor, cutlass::ComplexTransform::kNone, 8,    // transposed B operand
      cutlass::half_t, cutlass::layout::ColumnMajor, cutlass::ComplexTransform::kNone, 8,    // transposed A operand
      cutlass::half_t, cutlass::layout::RowMajor,
      float,
      cutlass::arch::OpClassTensorOp,
      cutlass::arch::Sm80,
      cutlass::gemm::GemmShape<128, 128, 32>,
      cutlass::gemm::GemmShape<64, 64, 32>,
      cutlass::gemm::GemmShape<16, 8, 16>,
      EpilogueOutputOp,
      cutlass::plus<float>,
      cutlass::gemm::threadblock::GemmIdentityThreadblockSwizzle<8>,
      5,
      cutlass::arch::OpMultiplyAdd
  >::GemmKernel;

  using Gemm = cutlass::gemm::device::GemmUniversalAdapter<GemmKernel>;

  using ReferenceOp = test::gemm::device::GemmWithReductionReference<
    Gemm, 
    dReluLambda
  >;

  test::gemm::device::TestGemmWithReduction<Gemm, ReferenceOp>(
    {136, 6920, 512},
    cutlass::gemm::GemmUniversalMode::kGemm
  );
}

#endif  // if defined(CUTLASS_ARCH_MMA_SM80_SUPPORTED)

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