#include "kernel_SimpleRadialCalib_update_r.h"
#include "memops.cuh"
#include <cooperative_groups.h>
#include <cooperative_groups/details/partitioning.h>
#include <cooperative_groups/memcpy_async.h>
#include <cooperative_groups/reduce.h>
#include <cuda_runtime.h>

namespace cg = cooperative_groups;

namespace caspar {

__global__ void __launch_bounds__(1024, 1) SimpleRadialCalibUpdateRKernel(
    double* SimpleRadialCalib_r_k,
    unsigned int SimpleRadialCalib_r_k_num_alloc,
    double* SimpleRadialCalib_w,
    unsigned int SimpleRadialCalib_w_num_alloc,
    const double* const negalpha,
    double* out_SimpleRadialCalib_r_kp1,
    unsigned int out_SimpleRadialCalib_r_kp1_num_alloc,
    double* const out_SimpleRadialCalib_r_kp1_norm2_tot,
    size_t problem_size) {
  const int global_thread_idx = blockIdx.x * blockDim.x + threadIdx.x;
  __shared__ uint8_t inout_shared[8192];

  __shared__ double out_SimpleRadialCalib_r_kp1_norm2_tot_local[1];

  double r0, r1, r2, r3, r4, r5, r6;

  if (global_thread_idx < problem_size) {
    ReadIdx2<1024, double, double, double2>(SimpleRadialCalib_r_k,
                                            0 * SimpleRadialCalib_r_k_num_alloc,
                                            global_thread_idx,
                                            r0,
                                            r1);
    ReadIdx2<1024, double, double, double2>(SimpleRadialCalib_w,
                                            0 * SimpleRadialCalib_w_num_alloc,
                                            global_thread_idx,
                                            r2,
                                            r3);
  };
  LoadUnique<1, double, double>(negalpha, 0, (double*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared1<double>((double*)inout_shared, 0, r4);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r2 = fma(r2, r4, r0);
    r3 = fma(r3, r4, r1);
    WriteIdx2<1024, double, double, double2>(
        out_SimpleRadialCalib_r_kp1,
        0 * out_SimpleRadialCalib_r_kp1_num_alloc,
        global_thread_idx,
        r2,
        r3);
    ReadIdx2<1024, double, double, double2>(SimpleRadialCalib_r_k,
                                            2 * SimpleRadialCalib_r_k_num_alloc,
                                            global_thread_idx,
                                            r1,
                                            r0);
    ReadIdx2<1024, double, double, double2>(SimpleRadialCalib_w,
                                            2 * SimpleRadialCalib_w_num_alloc,
                                            global_thread_idx,
                                            r5,
                                            r6);
    r5 = fma(r5, r4, r1);
    r4 = fma(r6, r4, r0);
    WriteIdx2<1024, double, double, double2>(
        out_SimpleRadialCalib_r_kp1,
        2 * out_SimpleRadialCalib_r_kp1_num_alloc,
        global_thread_idx,
        r5,
        r4);
    r2 = fma(r2, r2, r4 * r4);
    r2 = fma(r5, r5, r2);
    r2 = fma(r3, r3, r2);
  };
  SumStore<double>(out_SimpleRadialCalib_r_kp1_norm2_tot_local,
                   (double*)inout_shared,
                   0,
                   global_thread_idx < problem_size,
                   r2);
  SumFlushFinal<double>(out_SimpleRadialCalib_r_kp1_norm2_tot_local,
                        out_SimpleRadialCalib_r_kp1_norm2_tot,
                        1);
}

void SimpleRadialCalibUpdateR(
    double* SimpleRadialCalib_r_k,
    unsigned int SimpleRadialCalib_r_k_num_alloc,
    double* SimpleRadialCalib_w,
    unsigned int SimpleRadialCalib_w_num_alloc,
    const double* const negalpha,
    double* out_SimpleRadialCalib_r_kp1,
    unsigned int out_SimpleRadialCalib_r_kp1_num_alloc,
    double* const out_SimpleRadialCalib_r_kp1_norm2_tot,
    size_t problem_size) {
  if (problem_size == 0) {
    return;
  }

  const int n_blocks = (problem_size + 1024 - 1) / 1024;
  SimpleRadialCalibUpdateRKernel<<<n_blocks, 1024>>>(
      SimpleRadialCalib_r_k,
      SimpleRadialCalib_r_k_num_alloc,
      SimpleRadialCalib_w,
      SimpleRadialCalib_w_num_alloc,
      negalpha,
      out_SimpleRadialCalib_r_kp1,
      out_SimpleRadialCalib_r_kp1_num_alloc,
      out_SimpleRadialCalib_r_kp1_norm2_tot,
      problem_size);
}

}  // namespace caspar