LAPACK  3.10.0
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 35 of file lapacke_sggbak_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_sggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v, &ldv,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldv_t = MAX(1,n);
50  float* v_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldv < m ) {
53  info = -11;
54  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
55  return info;
56  }
57  /* Allocate memory for temporary array(s) */
58  v_t = (float*)LAPACKE_malloc( sizeof(float) * ldv_t * MAX(1,m) );
59  if( v_t == NULL ) {
61  goto exit_level_0;
62  }
63  /* Transpose input matrices */
64  LAPACKE_sge_trans( matrix_layout, n, m, v, ldv, v_t, ldv_t );
65  /* Call LAPACK function and adjust info */
66  LAPACK_sggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v_t,
67  &ldv_t, &info );
68  if( info < 0 ) {
69  info = info - 1;
70  }
71  /* Transpose output matrices */
72  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, m, v_t, ldv_t, v, ldv );
73  /* Release memory and exit */
74  LAPACKE_free( v_t );
75 exit_level_0:
76  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
77  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
78  }
79  } else {
80  info = -1;
81  LAPACKE_xerbla( "LAPACKE_sggbak_work", info );
82  }
83  return info;
84 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_sggbak(...)
Definition: lapack.h:4251
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_xerbla(const char *name, lapack_int info)
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:46
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