hpc-2022-g3/OpenMP/linear-algebra/kernels/bicg/bicg.c

#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>

/* Include polybench common header. */
#include <polybench.h>

/* Include benchmark-specific header. */
/* Default data type is double, default size is 4000. */
#include "bicg.h"

/* Array initialization. */
static void init_array(int nx, int ny,
                       DATA_TYPE POLYBENCH_2D(A, NX, NY, nx, ny),
                       DATA_TYPE POLYBENCH_1D(r, NX, nx),
                       DATA_TYPE POLYBENCH_1D(p, NY, ny))
{
  int i, j;

  for (i = 0; i < ny; i++)
    p[i] = i * M_PI;
  for (i = 0; i < nx; i++)
  {
    r[i] = i * M_PI;
    for (j = 0; j < ny; j++)
      A[i][j] = ((DATA_TYPE)i * (j + 1)) / nx;
  }
}

/* DCE code. Must scan the entire live-out data.
   Can be used also to check the correctness of the output. */
static void print_array(int nx, int ny,
                        DATA_TYPE POLYBENCH_1D(s, NY, ny),
                        DATA_TYPE POLYBENCH_1D(q, NX, nx))

{
  int i;

  for (i = 0; i < ny; i++)
  {
    fprintf(stderr, DATA_PRINTF_MODIFIER, s[i]);
    if (i % 20 == 0)
      fprintf(stderr, "\n");
  }
  for (i = 0; i < nx; i++)
  {
    fprintf(stderr, DATA_PRINTF_MODIFIER, q[i]);
    if (i % 20 == 0)
      fprintf(stderr, "\n");
  }
  fprintf(stderr, "\n");
}

/* Main computational kernel. The whole function will be timed,
   including the call and return. */
static void kernel_bicg(int nx, int ny,
                        DATA_TYPE POLYBENCH_2D(A, NX, NY, nx, ny),
                        DATA_TYPE POLYBENCH_1D(s, NY, ny),
                        DATA_TYPE POLYBENCH_1D(q, NX, nx),
                        DATA_TYPE POLYBENCH_1D(p, NY, ny),
                        DATA_TYPE POLYBENCH_1D(r, NX, nx))
{
  int i, j;

  for (i = 0; i < _PB_NY; i++)
    s[i] = 0;
  for (i = 0; i < _PB_NX; i++)
  {
    q[i] = 0;
    for (j = 0; j < _PB_NY; j++)
    {
      s[j] = s[j] + r[i] * A[i][j];
      q[i] = q[i] + A[i][j] * p[j];
    }
  }
}

int main(int argc, char **argv)
{
  /* Retrieve problem size. */
  int nx = NX;
  int ny = NY;

  /* Variable declaration/allocation. */
  POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, NX, NY, nx, ny);
  POLYBENCH_1D_ARRAY_DECL(s, DATA_TYPE, NY, ny);
  POLYBENCH_1D_ARRAY_DECL(q, DATA_TYPE, NX, nx);
  POLYBENCH_1D_ARRAY_DECL(p, DATA_TYPE, NY, ny);
  POLYBENCH_1D_ARRAY_DECL(r, DATA_TYPE, NX, nx);

  /* Initialize array(s). */
  init_array(nx, ny,
             POLYBENCH_ARRAY(A),
             POLYBENCH_ARRAY(r),
             POLYBENCH_ARRAY(p));

  /* Start timer. */
  polybench_start_instruments;

  /* Run kernel. */
  kernel_bicg(nx, ny,
              POLYBENCH_ARRAY(A),
              POLYBENCH_ARRAY(s),
              POLYBENCH_ARRAY(q),
              POLYBENCH_ARRAY(p),
              POLYBENCH_ARRAY(r));

  /* Stop and print timer. */
  polybench_stop_instruments;
  polybench_print_instruments;

  /* Prevent dead-code elimination. All live-out data must be printed
     by the function call in argument. */
  polybench_prevent_dce(print_array(nx, ny, POLYBENCH_ARRAY(s), POLYBENCH_ARRAY(q)));

  /* Be clean. */
  POLYBENCH_FREE_ARRAY(A);
  POLYBENCH_FREE_ARRAY(s);
  POLYBENCH_FREE_ARRAY(q);
  POLYBENCH_FREE_ARRAY(p);
  POLYBENCH_FREE_ARRAY(r);

  return 0;
}