LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sgesv_work()

lapack_int LAPACKE_sgesv_work ( int  matrix_layout,
lapack_int  n,
lapack_int  nrhs,
float *  a,
lapack_int  lda,
lapack_int ipiv,
float *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_sgesv_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_sgesv( &n, &nrhs, a, &lda, ipiv, b, &ldb, &info );
44  if( info < 0 ) {
45  info = info - 1;
46  }
47  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
48  lapack_int lda_t = MAX(1,n);
49  lapack_int ldb_t = MAX(1,n);
50  float* a_t = NULL;
51  float* b_t = NULL;
52  /* Check leading dimension(s) */
53  if( lda < n ) {
54  info = -5;
55  LAPACKE_xerbla( "LAPACKE_sgesv_work", info );
56  return info;
57  }
58  if( ldb < nrhs ) {
59  info = -8;
60  LAPACKE_xerbla( "LAPACKE_sgesv_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
65  if( a_t == NULL ) {
67  goto exit_level_0;
68  }
69  b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,nrhs) );
70  if( b_t == NULL ) {
72  goto exit_level_1;
73  }
74  /* Transpose input matrices */
75  LAPACKE_sge_trans( matrix_layout, n, n, a, lda, a_t, lda_t );
76  LAPACKE_sge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
77  /* Call LAPACK function and adjust info */
78  LAPACK_sgesv( &n, &nrhs, a_t, &lda_t, ipiv, b_t, &ldb_t, &info );
79  if( info < 0 ) {
80  info = info - 1;
81  }
82  /* Transpose output matrices */
83  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
84  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, nrhs, b_t, ldb_t, b, ldb );
85  /* Release memory and exit */
86  LAPACKE_free( b_t );
87 exit_level_1:
88  LAPACKE_free( a_t );
89 exit_level_0:
90  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
91  LAPACKE_xerbla( "LAPACKE_sgesv_work", info );
92  }
93  } else {
94  info = -1;
95  LAPACKE_xerbla( "LAPACKE_sgesv_work", info );
96  }
97  return info;
98 }
#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
void LAPACK_sgesv(lapack_int *n, lapack_int *nrhs, float *a, lapack_int *lda, lapack_int *ipiv, float *b, lapack_int *ldb, lapack_int *info)
#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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