OpenBLAS/interface/lapack/laswp.c

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#include <stdio.h>
#include "common.h"
#ifdef FUNCTION_PROFILE
#include "functable.h"
#endif

static int (*laswp[])(BLASLONG, BLASLONG, BLASLONG, FLOAT, FLOAT *, BLASLONG, FLOAT *, BLASLONG, blasint *, BLASLONG) = {
#ifdef XDOUBLE
  qlaswp_plus, qlaswp_minus,
#elif defined(DOUBLE)
  dlaswp_plus, dlaswp_minus,
#else
  slaswp_plus, slaswp_minus,
#endif
};

int NAME(blasint *N, FLOAT *a, blasint *LDA, blasint *K1, blasint *K2, blasint *ipiv, blasint *INCX){

  blasint n    = *N;
  blasint lda  = *LDA;
  blasint k1   = *K1;
  blasint k2   = *K2;
  blasint incx = *INCX;
  int flag;

#ifdef SMP
  int mode, nthreads;
  FLOAT dummyalpha[2] = {ZERO, ZERO};
#endif

  PRINT_DEBUG_NAME;

  if (incx == 0 || n <= 0) return 0;

  IDEBUG_START;

  FUNCTION_PROFILE_START();

  flag = (incx < 0);

#ifdef SMP
  nthreads = num_cpu_avail(1);

  if (nthreads == 1) {
#endif

  (laswp[flag])(n, k1, k2, ZERO, a, lda, NULL, 0, ipiv, incx);

#ifdef SMP
  } else {

#ifdef XDOUBLE
  mode  =  BLAS_XDOUBLE | BLAS_REAL;
#elif defined(DOUBLE)
  mode  =  BLAS_DOUBLE  | BLAS_REAL;
#else
  mode  =  BLAS_SINGLE  | BLAS_REAL;
#endif

  blas_level1_thread(mode, n, k1, k2, dummyalpha,
		     a, lda, NULL, 0, ipiv, incx,
		     (int(*)())laswp[flag], nthreads);
  }
#endif

  FUNCTION_PROFILE_END(COMPSIZE, n * (k2 - k1), 0);

  IDEBUG_END;

  return 0;

}