OpenBLAS/benchmark/getri.c

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/* Copyright 2009, 2010 The University of Texas at Austin.           */
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#include "bench.h"

#undef GETRF
#undef GETRI

#ifndef COMPLEX
#ifdef XDOUBLE
#define GETRF   BLASFUNC(qgetrf)
#define GETRI   BLASFUNC(qgetri)
#elif defined(DOUBLE)
#define GETRF   BLASFUNC(dgetrf)
#define GETRI   BLASFUNC(dgetri)
#else
#define GETRF   BLASFUNC(sgetrf)
#define GETRI   BLASFUNC(sgetri)
#endif
#else
#ifdef XDOUBLE
#define GETRF   BLASFUNC(xgetrf)
#define GETRI   BLASFUNC(xgetri)
#elif defined(DOUBLE)
#define GETRF   BLASFUNC(zgetrf)
#define GETRI   BLASFUNC(zgetri)
#else
#define GETRF   BLASFUNC(cgetrf)
#define GETRI   BLASFUNC(cgetri)
#endif
#endif

extern void GETRI(blasint *m, FLOAT *a, blasint *lda, blasint *ipiv, FLOAT *work, blasint *lwork, blasint *info);

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

  FLOAT *a,*work;
  FLOAT wkopt[4];
  blasint *ipiv;
  blasint m, i, j, info,lwork;

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

  double time1;

  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++;}


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

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

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



    for(j = 0; j < to; j++){
      for(i = 0; i < to * COMPSIZE; i++){
	a[(long)i + (long)j * (long)to * COMPSIZE] = ((FLOAT) rand() / (FLOAT) RAND_MAX) - 0.5;
      }
    }


    lwork = -1;
    m=to;

  GETRI(&m, a, &m, ipiv, wkopt, &lwork, &info);

  lwork = (blasint)wkopt[0];
  if (( work = (FLOAT *)malloc(sizeof(FLOAT) * lwork * COMPSIZE)) == NULL){
    fprintf(stderr,"Out of Memory!!\n");exit(1);
  }


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

  fprintf(stderr, "   SIZE           FLops           Time          Lwork\n");

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

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

    GETRF (&m, &m, a, &m, ipiv, &info);

    if (info) {
      fprintf(stderr, "Matrix is not singular .. %d\n", info);
      exit(1);
    }

    begin();

    lwork = -1;
    GETRI(&m, a, &m, ipiv, wkopt, &lwork, &info);

    lwork = (blasint)wkopt[0];
    GETRI(&m, a, &m, ipiv, work, &lwork, &info);
    end();

    if (info) {
      fprintf(stderr, "failed compute inverse matrix .. %d\n", info);
      exit(1);
    }

    time1 = getsec();

    fprintf(stderr,
	    " %10.2f MFlops : %10.2f Sec : %d\n",
	    COMPSIZE * COMPSIZE * (4.0/3.0 * (double)m * (double)m *(double)m - (double)m *(double)m + 5.0/3.0* (double)m) / time1 * 1.e-6,time1,lwork);


  }

  return 0;
}

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