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 // SPDX-License-Identifier: MIT
 // Copyright (c) 2018-2025, Advanced Micro Devices, Inc. All rights reserved.
  
 #pragma once
  
 #include "ck/utility/data_type.hpp"
 #include "ck/tensor_operation/gpu/element/element_wise_operation.hpp"
  
 namespace ck {
 namespace tensor_operation {
 namespace element_wise {
  
 struct Add
 {
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y& y, const X0& x0, const X1& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const float& x1) const
     {
         y = x0 + x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double>(double& y, const double& x0, const double& x1) const
     {
         y = x0 + x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const half_t& x1) const
     {
         y = x0 + type_convert<half_t>(x1);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const float& x0, const float& x1) const
     {
         y = type_convert<half_t>(x0 + x1);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const float& x0, const half_t& x1) const
     {
         y = x0 + type_convert<float>(x1);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         y = x0 + x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x1);
         y                  = x0 + x1_tmp;
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x0);
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x1_tmp + x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const float& x0, const bhalf_t& x1) const
     {
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x0 + x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         y = x0 + x1;
     };
 };
  
 struct Max
 {
     template <typename Y, typename X0, typename X1>
     __host__ __device__ void operator()(Y& y, const X0& x0, const X1& x1) const
     {
         const Y x0_converted = type_convert<Y>(x0);
         const Y x1_converted = type_convert<Y>(x1);
         y                    = ck::math::max(x0_converted, x1_converted);
     }
 };
  
 struct Min
 {
     template <typename Y, typename X0, typename X1>
     __host__ __device__ void operator()(Y& y, const X0& x0, const X1& x1) const
     {
         const Y x0_converted = type_convert<Y>(x0);
         const Y x1_converted = type_convert<Y>(x1);
         y                    = ck::math::min(x0_converted, x1_converted);
     }
 };
  
 struct Multiply
 {
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y& y, const X0& x0, const X1& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const float& x1) const
     {
         y = x0 * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double>(double& y, const double& x0, const double& x1) const
     {
         y = x0 * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const half_t& x1) const
     {
         y = x0 * type_convert<half_t>(x1);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const float& x0, const float& x1) const
     {
         y = type_convert<half_t>(x0 * x1);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const float& x0, const half_t& x1) const
     {
         y = type_convert<half_t>(x0) * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         y = x0 * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x1);
         y                  = x0 * x1_tmp;
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x0);
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x1_tmp * x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const int8_t& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x0);
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x1_tmp * x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const float& x0, const bhalf_t& x1) const
     {
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x0 * x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         y = x0 * x1;
     };
 };
  
 struct ScaleAdd
 {
     __host__ __device__ ScaleAdd(float scale = 1.f) : scale_(scale) {}
  
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y& y, const X0& x0, const X1& x1) const
     {
         y = ck::type_convert<Y>(scale_ * ck::type_convert<float>(x0) + ck::type_convert<float>(x1));
     }
  
     template <>
     __host__ __device__ void
     operator()<float, float, half_t>(float& y, const float& x0, const half_t& x1) const
     {
         y = scale_ * x0 + ck::type_convert<float>(x1);
     };
  
     template <>
     __host__ __device__ void
     operator()<float, float, bhalf_t>(float& y, const float& x0, const bhalf_t& x1) const
     {
         y = scale_ * x0 + ck::type_convert<float>(x1);
     };
  
     float scale_;
 };
  
 struct Subtract
 {
     template <typename T>
     __host__ __device__ constexpr void operator()(T& y, const T& x0, const T& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const float& x1) const
     {
         y = x0 - x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double>(double& y, const double& x0, const double& x1) const
     {
         y = x0 - x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         y = x0 - x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x0);
         const float x2_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = x1_tmp - x2_tmp;
         y                  = ck::type_convert<bhalf_t>(y_tmp);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         y = x0 - x1;
     };
 };
  
 struct Bilinear
 {
     Bilinear(float alpha = 1.f, float beta = 1.f) : alpha_(alpha), beta_(beta){};
  
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y&, const X0&, const X1&) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<double, double, double>(double& y, const double& x0, const double& x1) const
     {
         y = alpha_ * x0 + beta_ * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& y, const float& x0, const float& x1) const
     {
         y = alpha_ * x0 + beta_ * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t, int8_t, int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         y = type_convert<int8_t>(alpha_ * type_convert<float>(x0) +
                                  beta_ * type_convert<float>(x1));
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         y = type_convert<half_t>(alpha_) * x0 + type_convert<half_t>(beta_) * x1;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& y, const float& x0, const half_t& x1) const
     {
         y = type_convert<half_t>(alpha_ * x0 + beta_ * ck::type_convert<float>(x1));
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, bhalf_t, bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float x0_tmp = type_convert<float>(x0);
         const float x1_tmp = type_convert<float>(x1);
         const float y_tmp  = alpha_ * x0_tmp + beta_ * x1_tmp;
         y                  = type_convert<bhalf_t>(y_tmp);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& y, const float& x0, const bhalf_t& x1) const
     {
         const float x1_tmp = ck::type_convert<float>(x1);
         const float y_tmp  = alpha_ * x0 + beta_ * x1_tmp;
         y                  = y_tmp;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t, int32_t, int8_t>(int8_t& y, const int32_t& x0, const int8_t& x1) const
     {
         y = type_convert<int8_t>(alpha_ * type_convert<float>(x0) +
                                  beta_ * type_convert<float>(x1));
     };
  
     float alpha_;
     float beta_;
 };
  
 struct AddClamp
 {
     AddClamp(float floor = 0.f, float ceil = NumericLimits<float>::Max())
         : floor_(floor), ceil_(ceil){};
  
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y& y, const X0& x0, const X1& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& y, const float& x0, const float& x1) const
     {
         const float a = x0 + x1;
         y             = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double, double, double>(double& y, const double& x0, const double& x1) const
     {
         const double a = x0 + x1;
         y              = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         const half_t floor = type_convert<half_t>(floor_);
         const half_t ceil  = type_convert<half_t>(ceil_);
         const half_t a     = x0 + x1;
         y                  = a > floor ? (a < ceil ? a : ceil) : floor;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& y, const float& x0, const half_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         const float b = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
         y             = type_convert<half_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, half_t>(float& y, const float& x0, const half_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         y             = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& y, const float& x0, const bhalf_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         const float b = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
         y             = type_convert<bhalf_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, bhalf_t, bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float a = type_convert<float>(x0) + type_convert<float>(x1);
         const float b = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
         y             = type_convert<bhalf_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int, int, int8_t>(int& y, const int& x0, const int8_t& x1) const
     {
         const int8_t a = x0 + x1;
         y              = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t, int8_t, int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         const int8_t a = x0 + x1;
         y              = a > floor_ ? (a < ceil_ ? a : ceil_) : floor_;
     };
  
     const float floor_;
     const float ceil_;
 };
  
 struct AddRelu
 {
     template <typename Y, typename X0, typename X1>
     __host__ __device__ constexpr void operator()(Y& y, const X0& x0, const X1& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& y, const float& x0, const float& x1) const
     {
         const float a = x0 + x1;
         y             = a > 0.0f ? a : 0.0f;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double, double, double>(double& y, const double& x0, const double& x1) const
     {
         const double a = x0 + x1;
         y              = a > 0.0 ? a : 0.0;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         const half_t a = x0 + x1;
         y              = a > type_convert<half_t>(0.0f) ? a : type_convert<half_t>(0.0f);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& y, const float& x0, const half_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         const float b = a > 0.0f ? a : 0.0f;
         y             = type_convert<half_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, half_t>(float& y, const float& x0, const half_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         y             = a > 0.0f ? a : 0.0f;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& y, const float& x0, const bhalf_t& x1) const
     {
         const float a = x0 + type_convert<float>(x1);
         const float b = a > 0.0f ? a : 0.0f;
         y             = type_convert<bhalf_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, bhalf_t, bhalf_t>(bhalf_t& y, const bhalf_t& x0, const bhalf_t& x1) const
     {
         const float a = type_convert<float>(x0) + type_convert<float>(x1);
         const float b = a > 0.0f ? a : 0.0f;
         y             = type_convert<bhalf_t>(b);
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int, int, int8_t>(int& y, const int& x0, const int8_t& x1) const
     {
         const int8_t a = x0 + x1;
         y              = a > 0 ? a : 0;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<int8_t, int8_t, int8_t>(int8_t& y, const int8_t& x0, const int8_t& x1) const
     {
         const int8_t a = x0 + x1;
         y              = a > 0 ? a : 0;
     };
 };
  
 struct AddHardswish
 {
     template <typename T>
     __host__ __device__ constexpr void operator()(T& y, const T& x0, const T& x1) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float>(float& y, const float& x0, const float& x1) const
     {
         float a = x0 + x1;
         float b = a + float{3};
         float c = (b > 0) * (b > 6.0f ? 6.0f : b) * a * 0.166667f;
         y       = c;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<double>(double& y, const double& x0, const double& x1) const
     {
         double a = x0 + x1;
         double b = a + 3.0;
         double c = (b > 0) * (b > 6.0 ? 6.0 : b) * a * 0.166667;
         y        = c;
     };
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t>(half_t& y, const half_t& x0, const half_t& x1) const
     {
         float a = x0 + x1;
         float b = a + 3.0f;
         float c = (b > 0) * (b > 6.0f ? 6.0f : b) * a * 0.166667f;
         y       = c;
     };
 };
  
 // E = FastGelu(C + D)
 struct AddFastGelu
 {
     template <typename E, typename C, typename D>
     __host__ __device__ constexpr void operator()(E& e, const C& c, const D& d) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& e, const float& c, const float& d) const
     {
         const float x = c + d;
  
         FastGelu{}.template operator()<float, float>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& e, const half_t& c, const half_t& d) const
     {
         const half_t x = c + d;
  
         ck::tensor_operation::element_wise::FastGelu{}.template operator()<half_t, half_t>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& e, const float& c, const half_t& d) const
     {
         const float x0_f = c + d;
  
         float x1_f = 0;
  
         ck::tensor_operation::element_wise::FastGelu{}.template operator()<float, float>(x1_f,
                                                                                          x0_f);
  
         e = type_convert<half_t>(x1_f);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, bhalf_t, bhalf_t>(bhalf_t& e, const bhalf_t& c, const bhalf_t& d) const
     {
         const float x0_f = type_convert<float>(c) + type_convert<float>(d);
  
         float x1_f = 0;
  
         FastGelu{}.template operator()<float, float>(x1_f, x0_f);
  
         e = type_convert<bhalf_t>(x1_f);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& e, const float& c, const bhalf_t& d) const
     {
         const float x0_f = c + type_convert<float>(d);
  
         float x1_f = 0;
  
         FastGelu{}.template operator()<float, float>(x1_f, x0_f);
  
         e = type_convert<bhalf_t>(x1_f);
     }
 };
  
 // E = MultiplyFastGelu(C + D)
 struct MultiplyFastGelu
 {
     template <typename E, typename C, typename D>
     __host__ __device__ constexpr void operator()(E& e, const C& c, const D& d) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& e, const float& c, const float& d) const
     {
         const float x = c * d;
  
         FastGelu{}.template operator()<float, float>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& e, const half_t& c, const half_t& d) const
     {
         const half_t x = c * d;
  
         ck::tensor_operation::element_wise::FastGelu{}.template operator()<half_t, half_t>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& e, const float& c, const half_t& d) const
     {
         const float x0_f = c * d;
  
         float x1_f = 0;
  
         ck::tensor_operation::element_wise::FastGelu{}.template operator()<float, float>(x1_f,
                                                                                          x0_f);
  
         e = type_convert<half_t>(x1_f);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, bhalf_t, bhalf_t>(bhalf_t& e, const bhalf_t& c, const bhalf_t& d) const
     {
         const float x0_f = type_convert<float>(c) * type_convert<float>(d);
  
         float x1_f = 0;
  
         FastGelu{}.template operator()<float, float>(x1_f, x0_f);
  
         e = type_convert<bhalf_t>(x1_f);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& e, const float& c, const bhalf_t& d) const
     {
         const float x0_f = c * type_convert<float>(d);
  
         float x1_f = 0;
  
         FastGelu{}.template operator()<float, float>(x1_f, x0_f);
  
         e = type_convert<bhalf_t>(x1_f);
     }
 };
  
 // E = Silu(C + D)
 struct AddSilu
 {
     template <typename E, typename C, typename D>
     __host__ __device__ constexpr void operator()(E& e, const C& c, const D& d) const;
  
     template <>
     __host__ __device__ constexpr void
     operator()<float, float, float>(float& e, const float& c, const float& d) const
     {
         const float x = c + d;
  
         Silu{}.template operator()<float>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, half_t, half_t>(half_t& e, const half_t& c, const half_t& d) const
     {
         const half_t x = c + d;
  
         Silu{}.template operator()<half_t>(e, x);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<half_t, float, half_t>(half_t& e, const float& c, const half_t& d) const
     {
         const float x0_f = c + d;
  
         float x1_f = 0;
  
         Silu{}.template operator()<float>(x1_f, x0_f);
  
         e = type_convert<half_t>(x1_f);
     }
  
     template <>
     __host__ __device__ constexpr void
     operator()<bhalf_t, float, bhalf_t>(bhalf_t& e, const float& c, const bhalf_t& d) const
     {
         const float x0_f = c + type_convert<float>(d);
  
         float x1_f = 0;
  
         Silu{}.template operator()<float>(x1_f, x0_f);
  
         e = type_convert<bhalf_t>(x1_f);
     }
 };
  
 struct ConvScaleAdd
 {
     __host__ __device__ ConvScaleAdd(float scale_in  = 1.f,
                                      float scale_wei = 1.f,
                                      float scale_out = 1.f)
         : scale_in_(scale_in), scale_wei_(scale_wei), scale_out_(scale_out)
     {
     }
  
     template <typename E, typename C, typename D>
     __host__ __device__ void operator()(E& e, const C& c, const D& d) const;
  
     template <>
     __host__ __device__ void
     operator()<f8_t, float, float>(f8_t& e, const float& c, const float& d) const
     {
         float x;
         Add{}.template operator()<float>(x, c * scale_in_ * scale_wei_, d);
         e = type_convert<f8_t>(x * scale_out_);
     };
  
     float scale_in_;
     float scale_wei_;
     float scale_out_;
 };
  
 } // namespace element_wise
 } // namespace tensor_operation
 } // namespace ck