LAPACK  3.10.1
LAPACK: Linear Algebra PACKage
lapacke_dposvx_work.c
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28 *****************************************************************************
29 * Contents: Native middle-level C interface to LAPACK function dposvx
30 * Author: Intel Corporation
31 *****************************************************************************/
32 
33 #include "lapacke_utils.h"
34 
35 lapack_int LAPACKE_dposvx_work( int matrix_layout, char fact, char uplo,
36  lapack_int n, lapack_int nrhs, double* a,
37  lapack_int lda, double* af, lapack_int ldaf,
38  char* equed, double* s, double* b,
39  lapack_int ldb, double* x, lapack_int ldx,
40  double* rcond, double* ferr, double* berr,
41  double* work, lapack_int* iwork )
42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dposvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, equed, s, b,
47  &ldb, x, &ldx, rcond, ferr, berr, work, iwork, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int lda_t = MAX(1,n);
53  lapack_int ldaf_t = MAX(1,n);
54  lapack_int ldb_t = MAX(1,n);
55  lapack_int ldx_t = MAX(1,n);
56  double* a_t = NULL;
57  double* af_t = NULL;
58  double* b_t = NULL;
59  double* x_t = NULL;
60  /* Check leading dimension(s) */
61  if( lda < n ) {
62  info = -7;
63  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
64  return info;
65  }
66  if( ldaf < n ) {
67  info = -9;
68  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
69  return info;
70  }
71  if( ldb < nrhs ) {
72  info = -13;
73  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
74  return info;
75  }
76  if( ldx < nrhs ) {
77  info = -15;
78  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
79  return info;
80  }
81  /* Allocate memory for temporary array(s) */
82  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
83  if( a_t == NULL ) {
85  goto exit_level_0;
86  }
87  af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
88  if( af_t == NULL ) {
90  goto exit_level_1;
91  }
92  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
93  if( b_t == NULL ) {
95  goto exit_level_2;
96  }
97  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
98  if( x_t == NULL ) {
100  goto exit_level_3;
101  }
102  /* Transpose input matrices */
103  LAPACKE_dpo_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
104  if( LAPACKE_lsame( fact, 'f' ) ) {
105  LAPACKE_dpo_trans( matrix_layout, uplo, n, af, ldaf, af_t, ldaf_t );
106  }
107  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
108  /* Call LAPACK function and adjust info */
109  LAPACK_dposvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
110  equed, s, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr,
111  work, iwork, &info );
112  if( info < 0 ) {
113  info = info - 1;
114  }
115  /* Transpose output matrices */
116  if( LAPACKE_lsame( fact, 'e' ) && LAPACKE_lsame( *equed, 'y' ) ) {
117  LAPACKE_dpo_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
118  }
119  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
120  LAPACKE_dpo_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
121  ldaf );
122  }
123  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
124  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
125  /* Release memory and exit */
126  LAPACKE_free( x_t );
127 exit_level_3:
128  LAPACKE_free( b_t );
129 exit_level_2:
130  LAPACKE_free( af_t );
131 exit_level_1:
132  LAPACKE_free( a_t );
133 exit_level_0:
134  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
135  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
136  }
137  } else {
138  info = -1;
139  LAPACKE_xerbla( "LAPACKE_dposvx_work", info );
140  }
141  return info;
142 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dposvx(...)
Definition: lapack.h:13124
#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
lapack_int LAPACKE_dposvx_work(int matrix_layout, char fact, char uplo, lapack_int n, lapack_int nrhs, double *a, lapack_int lda, double *af, lapack_int ldaf, char *equed, double *s, double *b, lapack_int ldb, double *x, lapack_int ldx, double *rcond, double *ferr, double *berr, double *work, lapack_int *iwork)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
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)