LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssptrs_work()

lapack_int LAPACKE_ssptrs_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const float *  ap,
const lapack_int ipiv,
float *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_ssptrs_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_ssptrs( &uplo, &n, &nrhs, ap, ipiv, b, &ldb, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldb_t = MAX(1,n);
50  float* b_t = NULL;
51  float* ap_t = NULL;
52  /* Check leading dimension(s) */
53  if( ldb < nrhs ) {
54  info = -8;
55  LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
56  return info;
57  }
58  /* Allocate memory for temporary array(s) */
59  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
60  if( b_t == NULL ) {
62  goto exit_level_0;
63  }
64  ap_t = (float*)
65  LAPACKE_malloc( sizeof(float) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
66  if( ap_t == NULL ) {
68  goto exit_level_1;
69  }
70  /* Transpose input matrices */
71  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
72  LAPACKE_ssp_trans( matrix_layout, uplo, n, ap, ap_t );
73  /* Call LAPACK function and adjust info */
74  LAPACK_ssptrs( &uplo, &n, &nrhs, ap_t, ipiv, b_t, &ldb_t, &info );
75  if( info < 0 ) {
76  info = info - 1;
77  }
78  /* Transpose output matrices */
79  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
80  /* Release memory and exit */
81  LAPACKE_free( ap_t );
82 exit_level_1:
83  LAPACKE_free( b_t );
84 exit_level_0:
85  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
86  LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
87  }
88  } else {
89  info = -1;
90  LAPACKE_xerbla( "LAPACKE_ssptrs_work", info );
91  }
92  return info;
93 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_ssp_trans(int matrix_layout, char uplo, lapack_int n, const float *in, float *out)
void LAPACK_ssptrs(char *uplo, lapack_int *n, lapack_int *nrhs, const float *ap, const lapack_int *ipiv, float *b, lapack_int *ldb, lapack_int *info)
void LAPACKE_sge_trans(int matrix_layout, lapack_int m, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:123
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