LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dpptrs_work()

lapack_int LAPACKE_dpptrs_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const double *  ap,
double *  b,
lapack_int  ldb 
)

Definition at line 35 of file lapacke_dpptrs_work.c.

38 {
39  lapack_int info = 0;
40  if( matrix_layout == LAPACK_COL_MAJOR ) {
41  /* Call LAPACK function and adjust info */
42  LAPACK_dpptrs( &uplo, &n, &nrhs, ap, b, &ldb, &info );
43  if( info < 0 ) {
44  info = info - 1;
45  }
46  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
47  lapack_int ldb_t = MAX(1,n);
48  double* b_t = NULL;
49  double* ap_t = NULL;
50  /* Check leading dimension(s) */
51  if( ldb < nrhs ) {
52  info = -7;
53  LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
54  return info;
55  }
56  /* Allocate memory for temporary array(s) */
57  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
58  if( b_t == NULL ) {
60  goto exit_level_0;
61  }
62  ap_t = (double*)
63  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
64  if( ap_t == NULL ) {
66  goto exit_level_1;
67  }
68  /* Transpose input matrices */
69  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
70  LAPACKE_dpp_trans( matrix_layout, uplo, n, ap, ap_t );
71  /* Call LAPACK function and adjust info */
72  LAPACK_dpptrs( &uplo, &n, &nrhs, ap_t, b_t, &ldb_t, &info );
73  if( info < 0 ) {
74  info = info - 1;
75  }
76  /* Transpose output matrices */
77  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
78  /* Release memory and exit */
79  LAPACKE_free( ap_t );
80 exit_level_1:
81  LAPACKE_free( b_t );
82 exit_level_0:
83  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
84  LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
85  }
86  } else {
87  info = -1;
88  LAPACKE_xerbla( "LAPACKE_dpptrs_work", info );
89  }
90  return info;
91 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dpptrs(...)
Definition: lapack.h:14198
#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_dpp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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