LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssytrs2_work()

lapack_int LAPACKE_ssytrs2_work ( int  matrix_layout,
char  uplo,
lapack_int  n,
lapack_int  nrhs,
const float *  a,
lapack_int  lda,
const lapack_int ipiv,
float *  b,
lapack_int  ldb,
float *  work 
)

Definition at line 36 of file lapacke_ssytrs2_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_ssytrs2( &uplo, &n, &nrhs, a, &lda, ipiv, b, &ldb, work, &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int lda_t = MAX(1,n);
50  lapack_int ldb_t = MAX(1,n);
51  float* a_t = NULL;
52  float* b_t = NULL;
53  /* Check leading dimension(s) */
54  if( lda < n ) {
55  info = -6;
56  LAPACKE_xerbla( "LAPACKE_ssytrs2_work", info );
57  return info;
58  }
59  if( ldb < nrhs ) {
60  info = -9;
61  LAPACKE_xerbla( "LAPACKE_ssytrs2_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
66  if( a_t == NULL ) {
68  goto exit_level_0;
69  }
70  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
71  if( b_t == NULL ) {
73  goto exit_level_1;
74  }
75  /* Transpose input matrices */
76  LAPACKE_ssy_trans( matrix_layout, uplo, n, a, lda, a_t, lda_t );
77  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
78  /* Call LAPACK function and adjust info */
79  LAPACK_ssytrs2( &uplo, &n, &nrhs, a_t, &lda_t, ipiv, b_t, &ldb_t, work,
80  &info );
81  if( info < 0 ) {
82  info = info - 1;
83  }
84  /* Transpose output matrices */
85  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
86  /* Release memory and exit */
87  LAPACKE_free( b_t );
88 exit_level_1:
89  LAPACKE_free( a_t );
90 exit_level_0:
91  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
92  LAPACKE_xerbla( "LAPACKE_ssytrs2_work", info );
93  }
94  } else {
95  info = -1;
96  LAPACKE_xerbla( "LAPACKE_ssytrs2_work", info );
97  }
98  return info;
99 }
void LAPACKE_ssy_trans(int matrix_layout, char uplo, lapack_int n, const float *in, lapack_int ldin, float *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
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
void LAPACK_ssytrs2(char *uplo, lapack_int *n, lapack_int *nrhs, const float *a, lapack_int *lda, const lapack_int *ipiv, float *b, lapack_int *ldb, float *work, lapack_int *info)
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