#include "kernel_SimpleRadialFocalAndExtra_normalize.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)
    SimpleRadialFocalAndExtraNormalizeKernel(
        float* precond_diag,
        unsigned int precond_diag_num_alloc,
        float* precond_tril,
        unsigned int precond_tril_num_alloc,
        float* njtr,
        unsigned int njtr_num_alloc,
        const float* const diag,
        float* out_normalized,
        unsigned int out_normalized_num_alloc,
        size_t problem_size) {
  const int global_thread_idx = blockIdx.x * blockDim.x + threadIdx.x;
  __shared__ uint8_t inout_shared[4096];

  float r0, r1, r2, r3, r4, r5;
  LoadUnique<1, float, float>(diag, 0, (float*)inout_shared);
  if (global_thread_idx < problem_size) {
    ReadShared1<float>((float*)inout_shared, 0, r0);
  };
  __syncthreads();
  if (global_thread_idx < problem_size) {
    r1 = 9.99999999999999955e-07;
    r1 = r0 * r1;
    ReadIdx2<1024, float, float, float2>(
        precond_diag, 0 * precond_diag_num_alloc, global_thread_idx, r2, r3);
    r4 = 1.00000000000000000e+00;
    r4 = r0 + r4;
    r3 = fmaf(r3, r4, r1);
    ReadIdx1<1024, float, float, float>(
        precond_tril, 0 * precond_tril_num_alloc, global_thread_idx, r0);
    r5 = -1.00000000000000000e+00;
    r5 = r0 * r5;
    r4 = fmaf(r2, r4, r1);
    r4 = 1.0 / r4;
    r5 = r5 * r4;
    r3 = fmaf(r0, r5, r3);
    r3 = 1.0 / r3;
    ReadIdx2<1024, float, float, float2>(
        njtr, 0 * njtr_num_alloc, global_thread_idx, r0, r2);
    r2 = fmaf(r0, r5, r2);
    r2 = r3 * r2;
    r5 = fmaf(r5, r2, r0 * r4);
    WriteIdx2<1024, float, float, float2>(out_normalized,
                                          0 * out_normalized_num_alloc,
                                          global_thread_idx,
                                          r5,
                                          r2);
  };
}

void SimpleRadialFocalAndExtraNormalize(float* precond_diag,
                                        unsigned int precond_diag_num_alloc,
                                        float* precond_tril,
                                        unsigned int precond_tril_num_alloc,
                                        float* njtr,
                                        unsigned int njtr_num_alloc,
                                        const float* const diag,
                                        float* out_normalized,
                                        unsigned int out_normalized_num_alloc,
                                        size_t problem_size) {
  if (problem_size == 0) {
    return;
  }

  const int n_blocks = (problem_size + 1024 - 1) / 1024;
  SimpleRadialFocalAndExtraNormalizeKernel<<<n_blocks, 1024>>>(
      precond_diag,
      precond_diag_num_alloc,
      precond_tril,
      precond_tril_num_alloc,
      njtr,
      njtr_num_alloc,
      diag,
      out_normalized,
      out_normalized_num_alloc,
      problem_size);
}

}  // namespace caspar