LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sggbak_work()

lapack_int LAPACKE_sggbak_work ( int  matrix_layout,
char  job,
char  side,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
const float *  lscale,
const float *  rscale,
lapack_int  m,
float *  v,
lapack_int  ldv 
)

Definition at line 36 of file lapacke_sggbak_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_sggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v, &ldv,
45  &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldv_t = MAX(1,n);
51  float* v_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldv < m ) {
54  info = -11;
55  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
56  return info;
57  }
58  /* Allocate memory for temporary array(s) */
59  v_t = (float*)LAPACKE_malloc( sizeof(float) * ldv_t * MAX(1,m) );
60  if( v_t == NULL ) {
62  goto exit_level_0;
63  }
64  /* Transpose input matrices */
65  LAPACKE_sge_trans( matrix_layout, n, m, v, ldv, v_t, ldv_t );
66  /* Call LAPACK function and adjust info */
67  LAPACK_sggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v_t,
68  &ldv_t, &info );
69  if( info < 0 ) {
70  info = info - 1;
71  }
72  /* Transpose output matrices */
73  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, m, v_t, ldv_t, v, ldv );
74  /* Release memory and exit */
75  LAPACKE_free( v_t );
76 exit_level_0:
77  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
78  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
79  }
80  } else {
81  info = -1;
82  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
83  }
84  return info;
85 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
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
void LAPACK_sggbak(char *job, char *side, lapack_int *n, lapack_int *ilo, lapack_int *ihi, const float *lscale, const float *rscale, lapack_int *m, float *v, lapack_int *ldv, lapack_int *info)
#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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