LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_zgttrs_work()

lapack_int LAPACKE_zgttrs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const lapack_complex_double dl,
const lapack_complex_double d,
const lapack_complex_double du,
const lapack_complex_double du2,
const lapack_int ipiv,
lapack_complex_double b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_zgttrs_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_zgttrs( &trans, &n, &nrhs, dl, d, du, du2, ipiv, b, &ldb,
48  &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int ldb_t = MAX(1,n);
54  lapack_complex_double* b_t = NULL;
55  /* Check leading dimension(s) */
56  if( ldb < nrhs ) {
57  info = -11;
58  LAPACKE_xerbla( "LAPACKE_zgttrs_work", info );
59  return info;
60  }
61  /* Allocate memory for temporary array(s) */
62  b_t = (lapack_complex_double*)
64  ldb_t * MAX(1,nrhs) );
65  if( b_t == NULL ) {
67  goto exit_level_0;
68  }
69  /* Transpose input matrices */
70  LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
71  /* Call LAPACK function and adjust info */
72  LAPACK_zgttrs( &trans, &n, &nrhs, dl, d, du, du2, ipiv, b_t, &ldb_t,
73  &info );
74  if( info < 0 ) {
75  info = info - 1;
76  }
77  /* Transpose output matrices */
78  LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
79  /* Release memory and exit */
80  LAPACKE_free( b_t );
81 exit_level_0:
82  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
83  LAPACKE_xerbla( "LAPACKE_zgttrs_work", info );
84  }
85  } else {
86  info = -1;
87  LAPACKE_xerbla( "LAPACKE_zgttrs_work", info );
88  }
89  return info;
90 }
#define LAPACK_zgttrs(...)
Definition: lapack.h:6115
#define lapack_int
Definition: lapack.h:83
#define lapack_complex_double
Definition: lapack.h:63
#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_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)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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