amax.c

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#include "bench.h"

#undef AMAX

#ifdef COMPLEX
#ifdef DOUBLE
#define AMAX BLASFUNC(dzamax)
#else
#define AMAX BLASFUNC(scamax)
#endif
#else
#ifdef DOUBLE
#define AMAX BLASFUNC(damax)
#else
#define AMAX BLASFUNC(samax)
#endif
#endif

int main(int argc, char *argv[])
{

  FLOAT *x;
  blasint m, i;
  blasint inc_x = 1;
  int loops = 1;
  int l;
  char *p;

  int from = 1;
  int to = 200;
  int step = 1;

  double time1, timeg;

  argc--;
  argv++;

  if (argc > 0)
  {
    from = atol(*argv);
    argc--;
    argv++;
  }
  if (argc > 0)
  {
    to = MAX(atol(*argv), from);
    argc--;
    argv++;
  }
  if (argc > 0)
  {
    step = atol(*argv);
    argc--;
    argv++;
  }

  if ((p = getenv("OPENBLAS_LOOPS")))
    loops = atoi(p);
  if ((p = getenv("OPENBLAS_INCX")))
    inc_x = atoi(p);

  fprintf(stderr, "From : %3d  To : %3d Step = %3d Inc_x = %d Loops = %d\n", from, to, step, inc_x, loops);

  if ((x = (FLOAT *)malloc(sizeof(FLOAT) * to * abs(inc_x) * COMPSIZE)) == NULL)
  {
    fprintf(stderr, "Out of Memory!!\n");
    exit(1);
  }

#ifdef __linux
  srandom(getpid());
#endif

  fprintf(stderr, "   SIZE       Flops\n");

  for (m = from; m <= to; m += step)
  {

    timeg = 0;
    fprintf(stderr, " %6d : ", (int)m);

    for (l = 0; l < loops; l++)
    {

      for (i = 0; i < m * COMPSIZE * abs(inc_x); i++)
      {
        x[i] = ((FLOAT)rand() / (FLOAT)RAND_MAX) - 0.5;
      }

      begin();
      AMAX(&m, x, &inc_x);
      end();
      timeg += getsec();
    }

    timeg /= loops;

    fprintf(stderr,
            " %10.2f MFlops %10.6f sec\n",
            COMPSIZE * sizeof(FLOAT) * 1. * (double)m / timeg * 1.e-6, timeg);
  }

  return 0;
}

// void main(int argc, char *argv[]) __attribute__((weak, alias("MAIN__")));