LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgttrs_work()

lapack_int LAPACKE_sgttrs_work ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const float *  dl,
const float *  d,
const float *  du,
const float *  du2,
const lapack_int ipiv,
float *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_sgttrs_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_sgttrs( &trans, &n, &nrhs, dl, d, du, du2, ipiv, b, &ldb,
45  &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldb_t = MAX(1,n);
51  float* b_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldb < nrhs ) {
54  info = -11;
55  LAPACKE_xerbla( "LAPACKE_sgttrs_work", info );
56  return info;
57  }
58  /* Allocate memory for temporary array(s) */
59  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
60  if( b_t == NULL ) {
62  goto exit_level_0;
63  }
64  /* Transpose input matrices */
65  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
66  /* Call LAPACK function and adjust info */
67  LAPACK_sgttrs( &trans, &n, &nrhs, dl, d, du, du2, ipiv, b_t, &ldb_t,
68  &info );
69  if( info < 0 ) {
70  info = info - 1;
71  }
72  /* Transpose output matrices */
73  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
74  /* Release memory and exit */
75  LAPACKE_free( b_t );
76 exit_level_0:
77  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
78  LAPACKE_xerbla( "LAPACKE_sgttrs_work", info );
79  }
80  } else {
81  info = -1;
82  LAPACKE_xerbla( "LAPACKE_sgttrs_work", info );
83  }
84  return info;
85 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_sgttrs(...)
Definition: lapack.h:6095
#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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