#include "kernel_PinholePrincipalPoint_pred_decrease_times_two.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)
    PinholePrincipalPointPredDecreaseTimesTwoKernel(
        float* PinholePrincipalPoint_step,
        unsigned int PinholePrincipalPoint_step_num_alloc,
        float* PinholePrincipalPoint_precond_diag,
        unsigned int PinholePrincipalPoint_precond_diag_num_alloc,
        const float* const diag,
        float* PinholePrincipalPoint_njtr,
        unsigned int PinholePrincipalPoint_njtr_num_alloc,
        float* const out_PinholePrincipalPoint_pred_dec,
        size_t problem_size) {
  const int global_thread_idx = blockIdx.x * blockDim.x + threadIdx.x;
  __shared__ uint8_t inout_shared[4096];

  __shared__ float out_PinholePrincipalPoint_pred_dec_local[1];

  float r0, r1, r2, r3, r4, r5, r6, r7;

  if (global_thread_idx < problem_size) {
    ReadIdx2<1024, float, float, float2>(
        PinholePrincipalPoint_step,
        0 * PinholePrincipalPoint_step_num_alloc,
        global_thread_idx,
        r0,
        r1);
    ReadIdx2<1024, float, float, float2>(
        PinholePrincipalPoint_njtr,
        0 * PinholePrincipalPoint_njtr_num_alloc,
        global_thread_idx,
        r2,
        r3);
    ReadIdx2<1024, float, float, float2>(
        PinholePrincipalPoint_precond_diag,
        0 * PinholePrincipalPoint_precond_diag_num_alloc,
        global_thread_idx,
        r4,
        r5);
    r6 = r0 * r4;
  };
  LoadUnique<1, float, float>(diag, 0, (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared1<float>((float*)inout_shared, 0, r7);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r6 = fmaf(r7, r6, r2);
    r2 = r1 * r5;
    r2 = fmaf(r7, r2, r3);
    r2 = fmaf(r1, r2, r0 * r6);
  };
  SumStore<float>(out_PinholePrincipalPoint_pred_dec_local,
                  (float*)inout_shared,
                  0,
                  global_thread_idx < problem_size,
                  r2);
  SumFlushFinal<float>(out_PinholePrincipalPoint_pred_dec_local,
                       out_PinholePrincipalPoint_pred_dec,
                       1);
}

void PinholePrincipalPointPredDecreaseTimesTwo(
    float* PinholePrincipalPoint_step,
    unsigned int PinholePrincipalPoint_step_num_alloc,
    float* PinholePrincipalPoint_precond_diag,
    unsigned int PinholePrincipalPoint_precond_diag_num_alloc,
    const float* const diag,
    float* PinholePrincipalPoint_njtr,
    unsigned int PinholePrincipalPoint_njtr_num_alloc,
    float* const out_PinholePrincipalPoint_pred_dec,
    size_t problem_size) {
  if (problem_size == 0) {
    return;
  }

  const int n_blocks = (problem_size + 1024 - 1) / 1024;
  PinholePrincipalPointPredDecreaseTimesTwoKernel<<<n_blocks, 1024>>>(
      PinholePrincipalPoint_step,
      PinholePrincipalPoint_step_num_alloc,
      PinholePrincipalPoint_precond_diag,
      PinholePrincipalPoint_precond_diag_num_alloc,
      diag,
      PinholePrincipalPoint_njtr,
      PinholePrincipalPoint_njtr_num_alloc,
      out_PinholePrincipalPoint_pred_dec,
      problem_size);
}

}  // namespace caspar