LAPACK  3.6.1 LAPACK: Linear Algebra PACKage
 lapack_int LAPACKE_zgbtrf_work ( int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, lapack_complex_double * ab, lapack_int ldab, lapack_int * ipiv )

Definition at line 36 of file lapacke_zgbtrf_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_zgbtrf( &m, &n, &kl, &ku, ab, &ldab, ipiv, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldab_t = MAX(1,2*kl+ku+1);
50  lapack_complex_double* ab_t = NULL;
51  /* Check leading dimension(s) */
52  if( ldab < n ) {
53  info = -7;
54  LAPACKE_xerbla( "LAPACKE_zgbtrf_work", info );
55  return info;
56  }
57  /* Allocate memory for temporary array(s) */
58  ab_t = (lapack_complex_double*)
59  LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
60  if( ab_t == NULL ) {
62  goto exit_level_0;
63  }
64  /* Transpose input matrices */
65  LAPACKE_zgb_trans( matrix_layout, m, n, kl, kl+ku, ab, ldab, ab_t,
66  ldab_t );
67  /* Call LAPACK function and adjust info */
68  LAPACK_zgbtrf( &m, &n, &kl, &ku, ab_t, &ldab_t, ipiv, &info );
69  if( info < 0 ) {
70  info = info - 1;
71  }
72  /* Transpose output matrices */
73  LAPACKE_zgb_trans( LAPACK_COL_MAJOR, m, n, kl, kl+ku, ab_t, ldab_t, ab,
74  ldab );
75  /* Release memory and exit */
76  LAPACKE_free( ab_t );
77 exit_level_0:
78  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
79  LAPACKE_xerbla( "LAPACKE_zgbtrf_work", info );
80  }
81  } else {
82  info = -1;
83  LAPACKE_xerbla( "LAPACKE_zgbtrf_work", info );
84  }
85  return info;
86 }
void LAPACK_zgbtrf(lapack_int *m, lapack_int *n, lapack_int *kl, lapack_int *ku, lapack_complex_double *ab, lapack_int *ldab, lapack_int *ipiv, lapack_int *info)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define lapack_complex_double
Definition: lapacke.h:90
void LAPACKE_zgb_trans(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const lapack_complex_double *in, lapack_int ldin, lapack_complex_double *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_free(p)
Definition: lapacke.h:113
#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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