LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgtrfs()

lapack_int LAPACKE_sgtrfs ( int  matrix_layout,
char  trans,
lapack_int  n,
lapack_int  nrhs,
const float *  dl,
const float *  d,
const float *  du,
const float *  dlf,
const float *  df,
const float *  duf,
const float *  du2,
const lapack_int ipiv,
const float *  b,
lapack_int  ldb,
float *  x,
lapack_int  ldx,
float *  ferr,
float *  berr 
)

Definition at line 36 of file lapacke_sgtrfs.c.

43 {
44  lapack_int info = 0;
45  lapack_int* iwork = NULL;
46  float* work = NULL;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_sgtrfs", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
54  return -13;
55  }
56  if( LAPACKE_s_nancheck( n, d, 1 ) ) {
57  return -6;
58  }
59  if( LAPACKE_s_nancheck( n, df, 1 ) ) {
60  return -9;
61  }
62  if( LAPACKE_s_nancheck( n-1, dl, 1 ) ) {
63  return -5;
64  }
65  if( LAPACKE_s_nancheck( n-1, dlf, 1 ) ) {
66  return -8;
67  }
68  if( LAPACKE_s_nancheck( n-1, du, 1 ) ) {
69  return -7;
70  }
71  if( LAPACKE_s_nancheck( n-2, du2, 1 ) ) {
72  return -11;
73  }
74  if( LAPACKE_s_nancheck( n-1, duf, 1 ) ) {
75  return -10;
76  }
77  if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, x, ldx ) ) {
78  return -15;
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 = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n) );
88  if( work == NULL ) {
90  goto exit_level_1;
91  }
92  /* Call middle-level interface */
93  info = LAPACKE_sgtrfs_work( matrix_layout, trans, n, nrhs, dl, d, du, dlf,
94  df, duf, du2, ipiv, b, ldb, x, ldx, ferr, berr,
95  work, iwork );
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_sgtrfs", 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
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
lapack_int LAPACKE_sgtrfs_work(int matrix_layout, char trans, lapack_int n, lapack_int nrhs, const float *dl, const float *d, const float *du, const float *dlf, const float *df, const float *duf, const float *du2, const lapack_int *ipiv, const float *b, lapack_int ldb, float *x, lapack_int ldx, float *ferr, float *berr, float *work, lapack_int *iwork)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
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