#include "kernel_Point_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)
    PointNormalizeKernel(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, r6, r7, r8, r9, r10;
  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;
    ReadIdx3<1024, float, float, float4>(precond_diag,
                                         0 * precond_diag_num_alloc,
                                         global_thread_idx,
                                         r2,
                                         r3,
                                         r4);
    r5 = 1.00000000000000000e+00;
    r5 = r0 + r5;
    r4 = fmaf(r4, r5, r1);
    r0 = -1.00000000000000000e+00;
    ReadIdx3<1024, float, float, float4>(precond_tril,
                                         0 * precond_tril_num_alloc,
                                         global_thread_idx,
                                         r6,
                                         r7,
                                         r8);
    r2 = fmaf(r2, r5, r1);
    r2 = 1.0 / r2;
    r9 = r0 * r2;
    r10 = r6 * r9;
    r8 = fmaf(r7, r10, r8);
    r5 = fmaf(r3, r5, r1);
    r5 = fmaf(r6, r10, r5);
    r5 = 1.0 / r5;
    r6 = r8 * r5;
    r3 = r7 * r7;
    r3 = fmaf(r2, r3, r8 * r6);
    r4 = fmaf(r0, r3, r4);
    r4 = 1.0 / r4;
    ReadIdx3<1024, float, float, float4>(
        njtr, 0 * njtr_num_alloc, global_thread_idx, r3, r8, r1);
    r6 = r0 * r6;
    r8 = fmaf(r3, r10, r8);
    r1 = fmaf(r8, r6, r1);
    r0 = r7 * r3;
    r1 = fmaf(r9, r0, r1);
    r1 = r4 * r1;
    r6 = fmaf(r1, r6, r8 * r5);
    r5 = r7 * r9;
    r5 = fmaf(r1, r5, r3 * r2);
    r5 = fmaf(r6, r10, r5);
    WriteIdx3<1024, float, float, float4>(out_normalized,
                                          0 * out_normalized_num_alloc,
                                          global_thread_idx,
                                          r5,
                                          r6,
                                          r1);
  };
}

void PointNormalize(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;
  PointNormalizeKernel<<<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