LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_slaswp_work()

lapack_int LAPACKE_slaswp_work ( int  matrix_layout,
lapack_int  n,
float *  a,
lapack_int  lda,
lapack_int  k1,
lapack_int  k2,
const lapack_int ipiv,
lapack_int  incx 
)

Definition at line 36 of file lapacke_slaswp_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_slaswp( &n, a, &lda, &k1, &k2, ipiv, &incx );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int lda_t = MAX(1,k2);
49  lapack_int i;
50  for( i = k1; i <= k2; i++ ) {
51  lda_t = MAX( lda_t, ipiv[k1 + ( i - k1 ) * ABS( incx ) - 1] );
52  }
53  float* a_t = NULL;
54  /* Check leading dimension(s) */
55  if( lda < n ) {
56  info = -4;
57  LAPACKE_xerbla( "LAPACKE_slaswp_work", info );
58  return info;
59  }
60  /* Allocate memory for temporary array(s) */
61  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
62  if( a_t == NULL ) {
64  goto exit_level_0;
65  }
66  /* Transpose input matrices */
67  LAPACKE_sge_trans( matrix_layout, lda_t, n, a, lda, a_t, lda_t );
68  /* Call LAPACK function and adjust info */
69  LAPACK_slaswp( &n, a_t, &lda_t, &k1, &k2, ipiv, &incx );
70  info = 0; /* LAPACK call is ok! */
71  /* Transpose output matrices */
72  LAPACKE_sge_trans( LAPACK_COL_MAJOR, lda_t, n, a_t, lda_t, a, lda );
73  /* Release memory and exit */
74  LAPACKE_free( a_t );
75 exit_level_0:
76  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
77  LAPACKE_xerbla( "LAPACKE_slaswp_work", info );
78  }
79  } else {
80  info = -1;
81  LAPACKE_xerbla( "LAPACKE_slaswp_work", info );
82  }
83  return info;
84 }
void LAPACK_slaswp(lapack_int *n, float *a, lapack_int *lda, lapack_int *k1, lapack_int *k2, const lapack_int *ipiv, lapack_int *incx)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define ABS(x)
Definition: lapacke_utils.h:44
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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