LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_ssbevx_2stage_work()

lapack_int LAPACKE_ssbevx_2stage_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_int  kd,
float *  ab,
lapack_int  ldab,
float *  q,
lapack_int  ldq,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
float *  z,
lapack_int  ldz,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 35 of file lapacke_ssbevx_2stage_work.c.

43 {
44  lapack_int info = 0;
45  if( matrix_layout == LAPACK_COL_MAJOR ) {
46  /* Call LAPACK function and adjust info */
47  LAPACK_ssbevx_2stage( &jobz, &range, &uplo, &n, &kd, ab, &ldab, q, &ldq, &vl,
48  &vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork, iwork,
49  ifail, &info );
50  if( info < 0 ) {
51  info = info - 1;
52  }
53  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
54  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
55  LAPACKE_lsame( range, 'v' ) ) ? n :
56  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
57  lapack_int ldab_t = MAX(1,kd+1);
58  lapack_int ldq_t = MAX(1,n);
59  lapack_int ldz_t = MAX(1,n);
60  float* ab_t = NULL;
61  float* q_t = NULL;
62  float* z_t = NULL;
63  /* Check leading dimension(s) */
64  if( ldab < n ) {
65  info = -8;
66  LAPACKE_xerbla( "LAPACKE_ssbevx_2stage_work", info );
67  return info;
68  }
69  if( ldq < n ) {
70  info = -10;
71  LAPACKE_xerbla( "LAPACKE_ssbevx_2stage_work", info );
72  return info;
73  }
74  if( ldz < ncols_z ) {
75  info = -19;
76  LAPACKE_xerbla( "LAPACKE_ssbevx_2stage_work", info );
77  return info;
78  }
79  /* Allocate memory for temporary array(s) */
80  ab_t = (float*)LAPACKE_malloc( sizeof(float) * ldab_t * MAX(1,n) );
81  if( ab_t == NULL ) {
83  goto exit_level_0;
84  }
85  if( LAPACKE_lsame( jobz, 'v' ) ) {
86  q_t = (float*)LAPACKE_malloc( sizeof(float) * ldq_t * MAX(1,n) );
87  if( q_t == NULL ) {
89  goto exit_level_1;
90  }
91  }
92  if( LAPACKE_lsame( jobz, 'v' ) ) {
93  z_t = (float*)
94  LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
95  if( z_t == NULL ) {
97  goto exit_level_2;
98  }
99  }
100  /* Query optimal working array(s) size if requested */
101  if( lwork == -1 ) {
102  LAPACK_ssbevx_2stage( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
103  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
104  work, &lwork, iwork, ifail, &info );
105  return (info < 0) ? (info - 1) : info;
106  }
107  /* Transpose input matrices */
108  LAPACKE_ssb_trans( matrix_layout, uplo, n, kd, ab, ldab, ab_t, ldab_t );
109  /* Call LAPACK function and adjust info */
110  LAPACK_ssbevx_2stage( &jobz, &range, &uplo, &n, &kd, ab_t, &ldab_t, q_t,
111  &ldq_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
112  work, &lwork, iwork, ifail, &info );
113  if( info < 0 ) {
114  info = info - 1;
115  }
116  /* Transpose output matrices */
117  LAPACKE_ssb_trans( LAPACK_COL_MAJOR, uplo, n, kd, ab_t, ldab_t, ab,
118  ldab );
119  if( LAPACKE_lsame( jobz, 'v' ) ) {
120  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, q_t, ldq_t, q, ldq );
121  }
122  if( LAPACKE_lsame( jobz, 'v' ) ) {
123  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
124  ldz );
125  }
126  /* Release memory and exit */
127  if( LAPACKE_lsame( jobz, 'v' ) ) {
128  LAPACKE_free( z_t );
129  }
130 exit_level_2:
131  if( LAPACKE_lsame( jobz, 'v' ) ) {
132  LAPACKE_free( q_t );
133  }
134 exit_level_1:
135  LAPACKE_free( ab_t );
136 exit_level_0:
137  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
138  LAPACKE_xerbla( "LAPACKE_ssbevx_2stage_work", info );
139  }
140  } else {
141  info = -1;
142  LAPACKE_xerbla( "LAPACKE_ssbevx_2stage_work", info );
143  }
144  return info;
145 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_ssbevx_2stage(...)
Definition: lapack.h:14964
#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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