LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbtrd_work()

lapack_int LAPACKE_ssbtrd_work ( int  matrix_layout,
char  vect,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  d,
float *  e,
float *  q,
lapack_int  ldq,
float *  work 
)

Definition at line 35 of file lapacke_ssbtrd_work.c.

39 {
40  lapack_int info = 0;
41  if( matrix_layout == LAPACK_COL_MAJOR ) {
42  /* Call LAPACK function and adjust info */
43  LAPACK_ssbtrd( &vect, &uplo, &n, &kd, ab, &ldab, d, e, q, &ldq, work,
44  &info );
45  if( info < 0 ) {
46  info = info - 1;
47  }
48  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
49  lapack_int ldab_t = MAX(1,kd+1);
50  lapack_int ldq_t = MAX(1,n);
51  float* ab_t = NULL;
52  float* q_t = NULL;
53  /* Check leading dimension(s) */
54  if( ldab < n ) {
55  info = -7;
56  LAPACKE_xerbla( "LAPACKE_ssbtrd_work", info );
57  return info;
58  }
59  if( ldq < n ) {
60  info = -11;
61  LAPACKE_xerbla( "LAPACKE_ssbtrd_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
66  if( ab_t == NULL ) {
68  goto exit_level_0;
69  }
70  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
71  q_t = (float*)LAPACKE_malloc( sizeof(float) * ldq_t * MAX(1,n) );
72  if( q_t == NULL ) {
74  goto exit_level_1;
75  }
76  }
77  /* Transpose input matrices */
78  LAPACKE_ssb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
79  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
80  LAPACKE_sge_trans( matrix_layout, n, n, q, ldq, q_t, ldq_t );
81  }
82  /* Call LAPACK function and adjust info */
83  LAPACK_ssbtrd( &vect, &uplo, &n, &kd, ab_t, &ldab_t, d, e, q_t, &ldq_t,
84  work, &info );
85  if( info < 0 ) {
86  info = info - 1;
87  }
88  /* Transpose output matrices */
89  LAPACKE_ssb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
90  ldab );
91  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
92  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
93  }
94  /* Release memory and exit */
95  if( LAPACKE_lsame( vect, 'u' ) || LAPACKE_lsame( vect, 'v' ) ) {
96  LAPACKE_free( q_t );
97  }
98 exit_level_1:
99  LAPACKE_free( ab_t );
100 exit_level_0:
101  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
102  LAPACKE_xerbla( "LAPACKE_ssbtrd_work", info );
103  }
104  } else {
105  info = -1;
106  LAPACKE_xerbla( "LAPACKE_ssbtrd_work", info );
107  }
108  return info;
109 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_ssbtrd(...)
Definition: lapack.h:15174
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
#define LAPACK_TRANSPOSE_MEMORY_ERROR
Definition: lapacke.h:56
void LAPACKE_ssb_trans(int matrix_layout, char uplo, lapack_int n, lapack_int kd, const float *in, lapack_int ldin, float *out, lapack_int ldout)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, 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:46
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