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/*! \file
    \brief Unit tests Generic CuTe Layouts
*/

#include "../../common/cutlass_unit_test.h"
#include "cutlass/cutlass.h"
#include "cutlass/layout/layout.h"
#include "cutlass/matrix_coord.h"

// Cute includes
#include <cute/layout.hpp>
#include <cute/int_tuple.hpp>

using namespace cutlass;
using namespace cute;

namespace test {
namespace layout {

template <typename GenericLayout, typename Layout> 
  struct Testbed {


    Testbed() {}

    bool run() {
      GenericLayout generic_layout;
      Layout layout = Layout::packed({size<0>(generic_layout), size<1>(generic_layout)});

      for (int m = 0; m < size<0>(generic_layout); m++) {
        for (int n = 0; n < size<1>(generic_layout); n++) {
          if (generic_layout(m, n) != layout({m, n})) return false;
        }
      }

      return true;
    }
  };

}
}

//////////////////////////////////////////////////////////////////////////
//                      Test Generic CuTe Layouts
//////////////////////////////////////////////////////////////////////////

/// Canonical Layouts

TEST(GenericLayout, ColumnMajor) {
  using GenericLayout = cute::Layout<Shape<_8, _4>, Stride<_1, _8>>;
  using Layout = cutlass::layout::ColumnMajor;

  test::layout::Testbed<GenericLayout, Layout> testbed;

  EXPECT_TRUE(testbed.run());
}
//////////////////////////////////////////////////////////////////////////

TEST(GenericLayout, RowMajor) {
  using GenericLayout = cute::Layout<Shape<_8, _4>, Stride<_4, _1>>;
  using Layout = cutlass::layout::RowMajor;

  test::layout::Testbed<GenericLayout, Layout> testbed;

  EXPECT_TRUE(testbed.run());
}
//////////////////////////////////////////////////////////////////////////


/// Swizzle Shared Memory layouts

TEST(GenericLayout, RowMajorTensorOpMultiplicandCrosswise) {

  using GenericLayout = decltype(
        composition(
          Swizzle<3,3,3>{},
          Layout<Shape<_128, _64>, Stride<_64, _1>>{})
  );

  using Layout = cutlass::layout::RowMajorTensorOpMultiplicandCrosswise<
      cutlass::sizeof_bits<cutlass::half_t>::value, 64>;

  test::layout::Testbed<GenericLayout, Layout> testbed;

  EXPECT_TRUE(testbed.run());
}
//////////////////////////////////////////////////////////////////////////

TEST(GenericLayout, ColumnMajorTensorOpMultiplicandCongruous) {

  using GenericLayout = decltype(
        composition(
          Swizzle<3,3,4>{},
          Layout<Shape<_128, _64>>{})
  );

  using Layout = cutlass::layout::ColumnMajorTensorOpMultiplicandCongruous<
    cutlass::sizeof_bits<cutlass::half_t>::value, 64>;


  test::layout::Testbed<GenericLayout, Layout> testbed;

  EXPECT_TRUE(testbed.run());
}
//////////////////////////////////////////////////////////////////////////
