LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsposv_work()

lapack_int LAPACKE_dsposv_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
double *  a,
lapack_int  lda,
double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  work,
float *  swork,
lapack_int iter 
)

Definition at line 35 of file lapacke_dsposv_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dsposv( &uplo, &n, &nrhs, a, &lda, b, &ldb, x, &ldx, work, swork,
45  iter, &info );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int lda_t = MAX(1,n);
51  lapack_int ldb_t = MAX(1,n);
52  lapack_int ldx_t = MAX(1,n);
53  double* a_t = NULL;
54  double* b_t = NULL;
55  double* x_t = NULL;
56  /* Check leading dimension(s) */
57  if( lda < n ) {
58  info = -6;
59  LAPACKE_xerbla( "LAPACKE_dsposv_work", info );
60  return info;
61  }
62  if( ldb < nrhs ) {
63  info = -8;
64  LAPACKE_xerbla( "LAPACKE_dsposv_work", info );
65  return info;
66  }
67  if( ldx < nrhs ) {
68  info = -10;
69  LAPACKE_xerbla( "LAPACKE_dsposv_work", info );
70  return info;
71  }
72  /* Allocate memory for temporary array(s) */
73  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
74  if( a_t == NULL ) {
76  goto exit_level_0;
77  }
78  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
79  if( b_t == NULL ) {
81  goto exit_level_1;
82  }
83  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
84  if( x_t == NULL ) {
86  goto exit_level_2;
87  }
88  /* Transpose input matrices */
89  LAPACKE_dpo_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
90  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
91  /* Call LAPACK function and adjust info */
92  LAPACK_dsposv( &uplo, &n, &nrhs, a_t, &lda_t, b_t, &ldb_t, x_t, &ldx_t,
93  work, swork, iter, &info );
94  if( info < 0 ) {
95  info = info - 1;
96  }
97  /* Transpose output matrices */
98  LAPACKE_dpo_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
99  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
100  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
101  /* Release memory and exit */
102  LAPACKE_free( x_t );
103 exit_level_2:
104  LAPACKE_free( b_t );
105 exit_level_1:
106  LAPACKE_free( a_t );
107 exit_level_0:
108  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
109  LAPACKE_xerbla( "LAPACKE_dsposv_work", info );
110  }
111  } else {
112  info = -1;
113  LAPACKE_xerbla( "LAPACKE_dsposv_work", info );
114  }
115  return info;
116 }
#define LAPACK_dsposv(...)
Definition: lapack.h:13051
#define lapack_int
Definition: lapack.h:83
#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)
#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)
void LAPACKE_dpo_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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