LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgesvx_work()

lapack_int LAPACKE_dgesvx_work ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
double *  a,
lapack_int  lda,
double *  af,
lapack_int  ldaf,
lapack_int ipiv,
char *  equed,
double *  r,
double *  c,
double *  b,
lapack_int  ldb,
double *  x,
lapack_int  ldx,
double *  rcond,
double *  ferr,
double *  berr,
double *  work,
lapack_int iwork 
)

Definition at line 35 of file lapacke_dgesvx_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a, &lda, af, &ldaf, ipiv,
47  equed, r, c, b, &ldb, x, &ldx, rcond, ferr, berr, work,
48  iwork, &info );
49  if( info < 0 ) {
50  info = info - 1;
51  }
52  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
53  lapack_int lda_t = MAX(1,n);
54  lapack_int ldaf_t = MAX(1,n);
55  lapack_int ldb_t = MAX(1,n);
56  lapack_int ldx_t = MAX(1,n);
57  double* a_t = NULL;
58  double* af_t = NULL;
59  double* b_t = NULL;
60  double* x_t = NULL;
61  /* Check leading dimension(s) */
62  if( lda < n ) {
63  info = -7;
64  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
65  return info;
66  }
67  if( ldaf < n ) {
68  info = -9;
69  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
70  return info;
71  }
72  if( ldb < nrhs ) {
73  info = -15;
74  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
75  return info;
76  }
77  if( ldx < nrhs ) {
78  info = -17;
79  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
80  return info;
81  }
82  /* Allocate memory for temporary array(s) */
83  a_t = (double*)LAPACKE_malloc( sizeof(double) * lda_t * MAX(1,n) );
84  if( a_t == NULL ) {
86  goto exit_level_0;
87  }
88  af_t = (double*)LAPACKE_malloc( sizeof(double) * ldaf_t * MAX(1,n) );
89  if( af_t == NULL ) {
91  goto exit_level_1;
92  }
93  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,nrhs) );
94  if( b_t == NULL ) {
96  goto exit_level_2;
97  }
98  x_t = (double*)LAPACKE_malloc( sizeof(double) * ldx_t * MAX(1,nrhs) );
99  if( x_t == NULL ) {
101  goto exit_level_3;
102  }
103  /* Transpose input matrices */
104  LAPACKE_dge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
105  if( LAPACKE_lsame( fact, 'f' ) ) {
106  LAPACKE_dge_trans( matrix_layout, n, n, af, ldaf, af_t, ldaf_t );
107  }
108  LAPACKE_dge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
109  /* Call LAPACK function and adjust info */
110  LAPACK_dgesvx( &fact, &trans, &n, &nrhs, a_t, &lda_t, af_t, &ldaf_t,
111  ipiv, equed, r, c, b_t, &ldb_t, x_t, &ldx_t, rcond, ferr,
112  berr, work, iwork, &info );
113  if( info < 0 ) {
114  info = info - 1;
115  }
116  /* Transpose output matrices */
117  if( LAPACKE_lsame( fact, 'e' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
118  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
119  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
120  }
121  if( LAPACKE_lsame( fact, 'e' ) || LAPACKE_lsame( fact, 'n' ) ) {
122  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, af_t, ldaf_t, af, ldaf );
123  }
124  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
125  LAPACKE_lsame( *equed, 'c' ) || LAPACKE_lsame( *equed, 'r' ) ) ) {
126  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
127  }
128  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
129  /* Release memory and exit */
130  LAPACKE_free( x_t );
131 exit_level_3:
132  LAPACKE_free( b_t );
133 exit_level_2:
134  LAPACKE_free( af_t );
135 exit_level_1:
136  LAPACKE_free( a_t );
137 exit_level_0:
138  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
139  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
140  }
141  } else {
142  info = -1;
143  LAPACKE_xerbla( "LAPACKE_dgesvx_work", info );
144  }
145  return info;
146 }
#define LAPACK_dgesvx(...)
Definition: lapack.h:3747
#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)
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