LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dsysvx_work()

lapack_int LAPACKE_dsysvx_work ( int  matrix_layout,
char  fact,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const double *  a,
lapack_int  lda,
double *  af,
lapack_int  ldaf,
lapack_int ipiv,
const double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
double *  work,
lapack_int  lwork,
lapack_int iwork 
)

Definition at line 35 of file lapacke_dsysvx_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a, &lda, af, &ldaf, ipiv, b,
48  &ldb, x, &ldx, rcond, ferr, berr, work, &lwork, iwork,
49  &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int lda_t = MAX(1,n);
55  lapack_int ldaf_t = MAX(1,n);
56  lapack_int ldb_t = MAX(1,n);
57  lapack_int ldx_t = MAX(1,n);
58  double* a_t = NULL;
59  double* af_t = NULL;
60  double* b_t = NULL;
61  double* x_t = NULL;
62  /* Check leading dimension(s) */
63  if( lda < n ) {
64  info = -7;
65  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
66  return info;
67  }
68  if( ldaf < n ) {
69  info = -9;
70  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
71  return info;
72  }
73  if( ldb < nrhs ) {
74  info = -12;
75  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
76  return info;
77  }
78  if( ldx < nrhs ) {
79  info = -14;
80  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
81  return info;
82  }
83  /* Query optimal working array(s) size if requested */
84  if( lwork == -1 ) {
85  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a, &lda_t, af, &ldaf_t,
86  ipiv, b, &ldb_t, x, &ldx_t, rcond, ferr, berr, work,
87  &lwork, iwork, &info );
88  return (info < 0) ? (info - 1) : info;
89  }
90  /* Allocate memory for temporary array(s) */
91  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
92  if( a_t == NULL ) {
94  goto exit_level_0;
95  }
96  af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
97  if( af_t == NULL ) {
99  goto exit_level_1;
100  }
101  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
102  if( b_t == NULL ) {
104  goto exit_level_2;
105  }
106  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
107  if( x_t == NULL ) {
109  goto exit_level_3;
110  }
111  /* Transpose input matrices */
112  LAPACKE_dsy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
113  if( LAPACKE_lsame( fact, 'f' ) ) {
114  LAPACKE_dsy_trans( matrix_layout, uplo, n, af, ldaf, af_t, ldaf_t );
115  }
116  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
117  /* Call LAPACK function and adjust info */
118  LAPACK_dsysvx( &fact, &uplo, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
119  ipiv, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr, berr, work,
120  &lwork, iwork, &info );
121  if( info < 0 ) {
122  info = info - 1;
123  }
124  /* Transpose output matrices */
125  if( LAPACKE_lsame( fact, 'n' ) ) {
126  LAPACKE_dsy_trans( LAPACK_COL_MAJOR, uplo, n, af_t, ldaf_t, af,
127  ldaf );
128  }
129  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
130  /* Release memory and exit */
131  LAPACKE_free( x_t );
132 exit_level_3:
133  LAPACKE_free( b_t );
134 exit_level_2:
135  LAPACKE_free( af_t );
136 exit_level_1:
137  LAPACKE_free( a_t );
138 exit_level_0:
139  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
140  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
141  }
142  } else {
143  info = -1;
144  LAPACKE_xerbla( "LAPACKE_dsysvx_work", info );
145  }
146  return info;
147 }
#define LAPACK_dsysvx(...)
Definition: lapack.h:18182
#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
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_dsy_trans(int matrix_layout, char uplo, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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