LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dtfsm_work()

lapack_int LAPACKE_dtfsm_work ( int  matrix_layout,
char  transr,
char  side,
char  uplo,
char  trans,
char  diag,
lapack_int  m,
lapack_int  n,
double  alpha,
const double *  a,
double *  b,
lapack_int  ldb 
)

Definition at line 36 of file lapacke_dtfsm_work.c.

40 {
41  lapack_int info = 0;
42  if( matrix_layout == LAPACK_COL_MAJOR ) {
43  /* Call LAPACK function and adjust info */
44  LAPACK_dtfsm( &transr, &side, &uplo, &trans, &diag, &m, &n, &alpha, a,
45  b, &ldb );
46  if( info < 0 ) {
47  info = info - 1;
48  }
49  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
50  lapack_int ldb_t = MAX(1,m);
51  double* b_t = NULL;
52  double* a_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldb < n ) {
55  info = -12;
56  LAPACKE_xerbla( "LAPACKE_dtfsm_work", info );
57  return info;
58  }
59  /* Allocate memory for temporary array(s) */
60  b_t = (double*)LAPACKE_malloc( sizeof(double) * ldb_t * MAX(1,n) );
61  if( b_t == NULL ) {
63  goto exit_level_0;
64  }
65  if( IS_D_NONZERO(alpha) ) {
66  a_t = (double*)
67  LAPACKE_malloc( sizeof(double) *
68  ( MAX(1,n) * MAX(2,n+1) ) / 2 );
69  if( a_t == NULL ) {
71  goto exit_level_1;
72  }
73  }
74  /* Transpose input matrices */
75  if( IS_D_NONZERO(alpha) ) {
76  LAPACKE_dge_trans( matrix_layout, m, n, b, ldb, b_t, ldb_t );
77  }
78  if( IS_D_NONZERO(alpha) ) {
79  LAPACKE_dtf_trans( matrix_layout, transr, uplo, diag, n, a, a_t );
80  }
81  /* Call LAPACK function and adjust info */
82  LAPACK_dtfsm( &transr, &side, &uplo, &trans, &diag, &m, &n, &alpha, a_t,
83  b_t, &ldb_t );
84  info = 0; /* LAPACK call is ok! */
85  /* Transpose output matrices */
86  LAPACKE_dge_trans( LAPACK_COL_MAJOR, m, n, b_t, ldb_t, b, ldb );
87  /* Release memory and exit */
88  if( IS_D_NONZERO(alpha) ) {
89  LAPACKE_free( a_t );
90  }
91 exit_level_1:
92  LAPACKE_free( b_t );
93 exit_level_0:
94  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
95  LAPACKE_xerbla( "LAPACKE_dtfsm_work", info );
96  }
97  } else {
98  info = -1;
99  LAPACKE_xerbla( "LAPACKE_dtfsm_work", info );
100  }
101  return info;
102 }
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_dtf_trans(int matrix_layout, char transr, char uplo, char diag, lapack_int n, const double *in, double *out)
#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
#define IS_D_NONZERO(x)
Definition: lapacke_utils.h:60
void LAPACK_dtfsm(char *transr, char *side, char *uplo, char *trans, char *diag, lapack_int *m, lapack_int *n, double *alpha, const double *a, double *b, lapack_int *ldb)
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