LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgesvx()

lapack_int LAPACKE_sgesvx ( int  matrix_layout,
char  fact,
char  trans,
lapack_int  n,
lapack_int  nrhs,
float *  a,
lapack_int  lda,
float *  af,
lapack_int  ldaf,
lapack_int ipiv,
char *  equed,
float *  r,
float *  c,
float *  b,
lapack_int  ldb,
float *  x,
lapack_int  ldx,
float *  rcond,
float *  ferr,
float *  berr,
float *  rpivot 
)

Definition at line 35 of file lapacke_sgesvx.c.

42 {
43  lapack_int info = 0;
44  lapack_int* iwork = NULL;
45  float* work = NULL;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_sgesvx", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_sge_nancheck( matrix_layout, n, n, a, lda ) ) {
54  return -6;
55  }
56  if( LAPACKE_lsame( fact, 'f' ) ) {
57  if( LAPACKE_sge_nancheck( matrix_layout, n, n, af, ldaf ) ) {
58  return -8;
59  }
60  }
61  if( LAPACKE_sge_nancheck( matrix_layout, n, nrhs, b, ldb ) ) {
62  return -14;
63  }
64  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
65  LAPACKE_lsame( *equed, 'c' ) ) ) {
66  if( LAPACKE_s_nancheck( n, c, 1 ) ) {
67  return -13;
68  }
69  }
70  if( LAPACKE_lsame( fact, 'f' ) && ( LAPACKE_lsame( *equed, 'b' ) ||
71  LAPACKE_lsame( *equed, 'r' ) ) ) {
72  if( LAPACKE_s_nancheck( n, r, 1 ) ) {
73  return -12;
74  }
75  }
76  }
77 #endif
78  /* Allocate memory for working array(s) */
79  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,n) );
80  if( iwork == NULL ) {
82  goto exit_level_0;
83  }
84  work = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,4*n) );
85  if( work == NULL ) {
87  goto exit_level_1;
88  }
89  /* Call middle-level interface */
90  info = LAPACKE_sgesvx_work( matrix_layout, fact, trans, n, nrhs, a, lda, af,
91  ldaf, ipiv, equed, r, c, b, ldb, x, ldx, rcond,
92  ferr, berr, work, iwork );
93  /* Backup significant data from working array(s) */
94  *rpivot = work[0];
95  /* Release memory and exit */
96  LAPACKE_free( work );
97 exit_level_1:
98  LAPACKE_free( iwork );
99 exit_level_0:
100  if( info == LAPACK_WORK_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_sgesvx", info );
102  }
103  return info;
104 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
lapack_int LAPACKE_sgesvx_work(int matrix_layout, char fact, char trans, lapack_int n, lapack_int nrhs, float *a, lapack_int lda, float *af, lapack_int ldaf, lapack_int *ipiv, char *equed, float *r, float *c, float *b, lapack_int ldb, float *x, lapack_int ldx, float *rcond, float *ferr, float *berr, float *work, lapack_int *iwork)
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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