/***************************************************************************************************
 * Copyright (c) 2017 - 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 **************************************************************************************************/

/*! \file
    \brief 
      Default kernel-level GEMM definitions combine threadblock-scoped matrix multiply-add with
      the appropriate threadblock-scoped epilogue.
  
      Note, CUTLASS epilogues universally target row-major outputs. Column-major outputs are
      accommodated by exchanging A and B operands and assuming transposed layouts. Partial
      specializations here choose 'device::GemmTransposed' to implement this functionality.

*/

#pragma once

#include "cutlass/cutlass.h"

#include "cutlass/complex.h"
#include "cutlass/layout/matrix.h"
#include "cutlass/numeric_types.h"

#include "cutlass/gemm/kernel/gemm_planar_complex.h"
#include "cutlass/gemm/kernel/gemm_planar_complex_array.h"
#include "cutlass/gemm/kernel/default_gemm.h"
#include "cutlass/gemm/kernel/default_gemm_complex.h"

#include "cutlass/epilogue/threadblock/default_epilogue_planar_complex.h"
#include "cutlass/gemm/threadblock/default_mma_planar_complex_pipelined.h"
#include "cutlass/gemm/threadblock/default_mma_planar_complex_multistage.h" 

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

namespace cutlass {
namespace gemm {
namespace kernel {

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

template <
    /// Element type for A matrix operand
    typename ElementA,
    /// Layout type for A matrix operand
    typename LayoutA,
    /// Complex elementwise transformation on A operand
    ComplexTransform TransformA,
    /// Access granularity of A matrix in units of elements
    int kAlignmentA,
    /// Element type for B matrix operand
    typename ElementB,
    /// Layout type for B matrix operand
    typename LayoutB,
    /// Complex elementwise transformation on B operand
    ComplexTransform TransformB,
    /// Access granularity of B matrix in units of elements
    int kAlignmentB,
    /// Element type for C and D matrix operands
    typename ElementC,
    /// Layout type for C and D matrix operands
    typename LayoutC,
    /// Element type for internal accumulation
    typename ElementAccumulator,
    /// Operator class tag
    typename OperatorClass,
    /// Tag indicating architecture to tune for
    typename ArchTag,
    /// Threadblock-level tile size (concept: GemmShape)
    typename ThreadblockShape,
    /// Warp-level tile size (concept: GemmShape)
    typename WarpShape,
    /// Warp-level tile size (concept: GemmShape)
    typename InstructionShape,
    /// Epilogue output operator
    typename EpilogueOutputOp,
    /// Threadblock-level swizzling operator
    typename ThreadblockSwizzle,
    /// Number of stages used in the pipelined mainloop
    int Stages,
    /// Math operation performed by GEMM (e.g. arch::OpMultiplyAdd)
    typename Operator,
    /// Conditional enabling to switch between stages
    typename Enable = void
  >
struct DefaultGemmPlanarComplexUniversal;

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

/// Partial specialization for pipelined mainloop
template <
    /// Element type for A matrix operand
    typename ElementA,
    /// Layout type for A matrix operand
    typename LayoutA,
    /// Complex elementwise transformation on A operand
    ComplexTransform TransformA,
    /// Access granularity of A matrix in units of elements
    int kAlignmentA,
    /// Element type for B matrix operand
    typename ElementB,
    /// Layout type for B matrix operand
    typename LayoutB,
    /// Complex elementwise transformation on B operand
    ComplexTransform TransformB,
    /// Access granularity of B matrix in units of elements
    int kAlignmentB,
    /// Element type for C and D matrix operands
    typename ElementC,
    /// Layout type for C and D matrix operands
    typename LayoutC,
    /// Element type for internal accumulation
    typename ElementAccumulator,
    /// Operator class tag
    typename OperatorClass,
    /// Tag indicating architecture to tune for
    typename ArchTag,
    /// Threadblock-level tile size (concept: GemmShape)
    typename ThreadblockShape,
    /// Warp-level tile size (concept: GemmShape)
    typename WarpShape,
    /// Warp-level tile size (concept: GemmShape)
    typename InstructionShape,
    /// Epilogue output operator
    typename EpilogueOutputOp,
    /// Threadblock-level swizzling operator
    typename ThreadblockSwizzle,
    /// Number of stages used in the pipelined mainloop
    int Stages,
    /// Operation performed by GEMM
    typename Operator
  >
struct DefaultGemmPlanarComplexUniversal<
  ElementA,
  LayoutA,
  TransformA,
  kAlignmentA,
  ElementB,
  LayoutB,
  TransformB,
  kAlignmentB,
  ElementC,
  LayoutC,
  ElementAccumulator,
  OperatorClass,
  ArchTag,
  ThreadblockShape,
  WarpShape,
  InstructionShape,
  EpilogueOutputOp,
  ThreadblockSwizzle,
  Stages,
  Operator,
  typename platform::enable_if<(Stages <= 2)>::type 
> {

  /// Define planar complex valued variants instead
  using Mma = typename gemm::threadblock::DefaultMmaPlanarComplexPipelined<
    ElementA,
    LayoutA,
    kAlignmentA,
    ElementB,
    LayoutB,
    kAlignmentB,
    ElementAccumulator,
    LayoutC,
    OperatorClass,
    ArchTag,
    ThreadblockShape,
    WarpShape,
    InstructionShape,
    Stages,
    TransformA,
    TransformB,
    Operator
  >::ThreadblockMma;

  /// Planar complex epilogue
  using Epilogue = typename epilogue::threadblock::DefaultEpiloguePlanarComplex<
    ThreadblockShape,
    typename Mma::Policy::Operator,
    OperatorClass,
    ArchTag,
    ThreadblockShape::kK / WarpShape::kK,
    EpilogueOutputOp,
    EpilogueOutputOp::kCount  
  >::Epilogue;

  /// Define the kernel in terms of the default kernel
  using GemmKernel = kernel::GemmPlanarComplex<
    Mma,
    Epilogue, 
    ThreadblockSwizzle
  >;

  // Array variant
  using GemmArrayKernel = kernel::GemmPlanarComplexArray<
    Mma,
    Epilogue,
    ThreadblockSwizzle
  >;
};
  
/////////////////////////////////////////////////////////////////////////////////////////////////

/// Partial specialization for multiple pipeline stages.
template <
    /// Element type for A matrix operand
    typename ElementA,
    /// Layout type for A matrix operand
    typename LayoutA,
    /// Complex elementwise transformation on A operand
    ComplexTransform TransformA,
    /// Access granularity of A matrix in units of elements
    int kAlignmentA,
    /// Element type for B matrix operand
    typename ElementB,
    /// Layout type for B matrix operand
    typename LayoutB,
    /// Complex elementwise transformation on B operand
    ComplexTransform TransformB,
    /// Access granularity of B matrix in units of elements
    int kAlignmentB,
    /// Element type for C and D matrix operands
    typename ElementC,
    /// Layout type for C and D matrix operands
    typename LayoutC,
    /// Element type for internal accumulation
    typename ElementAccumulator,
    /// Operator class tag
    typename OperatorClass,
    /// Tag indicating architecture to tune for
    typename ArchTag,
    /// Threadblock-level tile size (concept: GemmShape)
    typename ThreadblockShape,
    /// Warp-level tile size (concept: GemmShape)
    typename WarpShape,
    /// Warp-level tile size (concept: GemmShape)
    typename InstructionShape,
    /// Epilogue output operator
    typename EpilogueOutputOp,
    /// Threadblock-level swizzling operator
    typename ThreadblockSwizzle,
    /// Number of stages used in the pipelined mainloop
    int Stages,
    /// Operation performed by GEMM
    typename Operator
  >
struct DefaultGemmPlanarComplexUniversal<
  ElementA,
  LayoutA,
  TransformA,
  kAlignmentA,
  ElementB,
  LayoutB,
  TransformB,
  kAlignmentB,
  ElementC,
  LayoutC,
  ElementAccumulator,
  OperatorClass,
  ArchTag,
  ThreadblockShape,
  WarpShape,
  InstructionShape,
  EpilogueOutputOp,
  ThreadblockSwizzle,
  Stages,
  Operator,
  typename platform::enable_if<(Stages > 2)>::type 
> {

  /// Define planar complex valued variants instead
  using Mma = typename gemm::threadblock::DefaultMmaPlanarComplexMultistage<
    ElementA,
    LayoutA,
    kAlignmentA,
    ElementB,
    LayoutB,
    kAlignmentB,
    ElementAccumulator,
    LayoutC,
    OperatorClass,
    ArchTag,
    ThreadblockShape,
    WarpShape,
    InstructionShape,
    Stages,
    TransformA,
    TransformB,
    Operator
  >::ThreadblockMma;

  /// Planar complex epilogue
  using Epilogue = typename epilogue::threadblock::DefaultEpiloguePlanarComplex<
    ThreadblockShape,
    typename Mma::Policy::Operator,
    OperatorClass,
    ArchTag,
    ThreadblockShape::kK / WarpShape::kK,
    EpilogueOutputOp,
    EpilogueOutputOp::kCount  
  >::Epilogue;

  /// Define the kernel in terms of the default kernel
  using GemmKernel = kernel::GemmPlanarComplex<
    Mma,
    Epilogue, 
    ThreadblockSwizzle
  >;

  // Array variant
  using GemmArrayKernel = kernel::GemmPlanarComplexArray<
    Mma,
    Epilogue,
    ThreadblockSwizzle
  >;
};

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

}  // namespace kernel
}  // namespace gemm
}  // namespace cutlass

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