LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dgbsvx()

lapack_int LAPACKE_dgbsvx ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  kl,
lapack_int  ku,
lapack_int  nrhs,
double *  ab,
lapack_int  ldab,
double *  afb,
lapack_int  ldafb,
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_dgbsvx.c.

44 {
45  lapack_int info = 0;
46  lapack_int* iwork = NULL;
47  double* work = NULL;
48  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
49  LAPACKE_xerbla( "LAPACKE_dgbsvx", -1 );
50  return -1;
51  }
52 #ifndef LAPACK_DISABLE_NAN_CHECK
53  if( LAPACKE_get_nancheck() ) {
54  /* Optionally check input matrices for NaNs */
55  if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, ku, ab, ldab ) ) {
56  return -8;
57  }
58  if( LAPACKE_lsame( fact, 'f' ) ) {
59  if( LAPACKE_dgb_nancheck( matrix_layout, n, n, kl, kl+ku, afb,
60  ldafb ) ) {
61  return -10;
62  }
63  }
64  if( LAPACKE_dge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
65  return -16;
66  }
67  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
68  LAPACKE_lsame( *equed, 'c' ) ) ) {
69  if( LAPACKE_d_nancheck( n, c, 1 ) ) {
70  return -15;
71  }
72  }
73  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
74  LAPACKE_lsame( *equed, 'r' ) ) ) {
75  if( LAPACKE_d_nancheck( n, r, 1 ) ) {
76  return -14;
77  }
78  }
79  }
80 #endif
81  /* Allocate memory for working array(s) */
82  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
83  if( iwork == NULL ) {
85  goto exit_level_0;
86  }
87  work = (double*)LAPACKE_malloc( sizeof(double) * MAX(1,3*n) );
88  if( work == NULL ) {
90  goto exit_level_1;
91  }
92  /* Call middle-level interface */
93  info = LAPACKE_dgbsvx_work( matrix_layout, fact, trans, n, kl, ku, nrhs, ab,
94  ldab, afb, ldafb, ipiv, equed, r, c, b, ldb, x,
95  ldx, rcond, ferr, berr, work, iwork );
96  /* Backup significant data from working array(s) */
97  *rpivot = work[0];
98  /* Release memory and exit */
99  LAPACKE_free( work );
100 exit_level_1:
101  LAPACKE_free( iwork );
102 exit_level_0:
103  if( info == LAPACK_WORK_MEMORY_ERROR ) {
104  LAPACKE_xerbla( "LAPACKE_dgbsvx", info );
105  }
106  return info;
107 }
lapack_int LAPACKE_dgbsvx_work(int matrix_layout, char fact, char trans, lapack_int n, lapack_int kl, lapack_int ku, lapack_int nrhs, double *ab, lapack_int ldab, double *afb, lapack_int ldafb, 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)
#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_dgb_nancheck(int matrix_layout, lapack_int m, lapack_int n, lapack_int kl, lapack_int ku, const double *ab, lapack_int ldab)
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
int LAPACKE_get_nancheck()
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