LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgesvx()

lapack_int LAPACKE_dgesvx ( 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 *  rpivot 
)

Definition at line 36 of file lapacke_dgesvx.c.

43 {
44  lapack_int info = 0;
45  lapack_int* iwork = NULL;
46  double* work = NULL;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dgesvx", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dge_nancheck( matrix_layout, n, n, a, lda ) ) {
55  return -6;
56  }
57  if( LAPACKE_lsame( fact, 'f' ) ) {
58  if( LAPACKE_dge_nancheck( matrix_layout, n, n, af, ldaf ) ) {
59  return -8;
60  }
61  }
62  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
63  return -14;
64  }
65  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
66  LAPACKE_lsame( *equed, 'c' ) ) ) {
67  if( LAPACKE_d_nancheck( n, c, 1 ) ) {
68  return -13;
69  }
70  }
71  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
72  LAPACKE_lsame( *equed, 'r' ) ) ) {
73  if( LAPACKE_d_nancheck( n, r, 1 ) ) {
74  return -12;
75  }
76  }
77  }
78 #endif
79  /* Allocate memory for working array(s) */
80  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
81  if( iwork == NULL ) {
83  goto exit_level_0;
84  }
85  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,4*n) );
86  if( work == NULL ) {
88  goto exit_level_1;
89  }
90  /* Call middle-level interface */
91  info = LAPACKE_dgesvx_work( matrix_layout, fact, trans, n, nrhs, a, lda, af,
92  ldaf, ipiv, equed, r, c, b, ldb, x, ldx, rcond,
93  ferr, berr, work, iwork );
94  /* Backup significant data from working array(s) */
95  *rpivot = work[0];
96  /* Release memory and exit */
97  LAPACKE_free( work );
98 exit_level_1:
99  LAPACKE_free( iwork );
100 exit_level_0:
101  if( info == LAPACK_WORK_MEMORY_ERROR ) {
102  LAPACKE_xerbla( "LAPACKE_dgesvx", info );
103  }
104  return info;
105 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define MAX(x, y)
Definition: lapacke_utils.h:47
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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)
int LAPACKE_get_nancheck()
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