LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zggbak_work()

lapack_int LAPACKE_zggbak_work ( int  matrix_layout,
char  job,
char  side,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
const double *  lscale,
const double *  rscale,
lapack_int  m,
lapack_complex_double v,
lapack_int  ldv 
)

Definition at line 36 of file lapacke_zggbak_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_zggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v, &ldv,
46  &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ldv_t = MAX(1,n);
52  lapack_complex_double* v_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldv < m ) {
55  info = -11;
56  LAPACKE_xerbla( "LAPACKE_zggbak_work", info );
57  return info;
58  }
59  /* Allocate memory for temporary array(s) */
60  v_t = (lapack_complex_double*)
61  LAPACKE_malloc( sizeof(lapack_complex_double) * ldv_t * MAX(1,m) );
62  if( v_t == NULL ) {
64  goto exit_level_0;
65  }
66  /* Transpose input matrices */
67  LAPACKE_zge_trans( matrix_layout, n, m, v, ldv, v_t, ldv_t );
68  /* Call LAPACK function and adjust info */
69  LAPACK_zggbak( &job, &side, &n, &ilo, &ihi, lscale, rscale, &m, v_t,
70  &ldv_t, &info );
71  if( info < 0 ) {
72  info = info - 1;
73  }
74  /* Transpose output matrices */
75  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, m, v_t, ldv_t, v, ldv );
76  /* Release memory and exit */
77  LAPACKE_free( v_t );
78 exit_level_0:
79  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
80  LAPACKE_xerbla( "LAPACKE_zggbak_work", info );
81  }
82  } else {
83  info = -1;
84  LAPACKE_xerbla( "LAPACKE_zggbak_work", info );
85  }
86  return info;
87 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_double
Definition: lapacke.h:90
void LAPACK_zggbak(char *job, char *side, lapack_int *n, lapack_int *ilo, lapack_int *ihi, const double *lscale, const double *rscale, lapack_int *m, lapack_complex_double *v, lapack_int *ldv, lapack_int *info)
#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
void LAPACKE_zge_trans(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
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