LAPACK  3.7.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sstevx_work()

lapack_int LAPACKE_sstevx_work ( int  matrix_layout,
char  jobz,
char  range,
lapack_int  n,
float *  d,
float *  e,
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 iwork,
lapack_int ifail 
)

Definition at line 36 of file lapacke_sstevx_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_sstevx( &jobz, &range, &n, d, e, &vl, &vu, &il, &iu, &abstol, m,
47  w, z, &ldz, work, iwork, ifail, &info );
48  if( info < 0 ) {
49  info = info - 1;
50  }
51  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
52  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
53  LAPACKE_lsame( range, 'v' ) ) ? n :
54  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
55  lapack_int ldz_t = MAX(1,n);
56  float* z_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldz < ncols_z ) {
59  info = -15;
60  LAPACKE_xerbla( "LAPACKE_sstevx_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  if( LAPACKE_lsame( jobz, 'v' ) ) {
65  z_t = (float*)
66  LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
67  if( z_t == NULL ) {
69  goto exit_level_0;
70  }
71  }
72  /* Call LAPACK function and adjust info */
73  LAPACK_sstevx( &jobz, &range, &n, d, e, &vl, &vu, &il, &iu, &abstol, m,
74  w, z_t, &ldz_t, work, iwork, ifail, &info );
75  if( info < 0 ) {
76  info = info - 1;
77  }
78  /* Transpose output matrices */
79  if( LAPACKE_lsame( jobz, 'v' ) ) {
80  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
81  ldz );
82  }
83  /* Release memory and exit */
84  if( LAPACKE_lsame( jobz, 'v' ) ) {
85  LAPACKE_free( z_t );
86  }
87 exit_level_0:
88  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
89  LAPACKE_xerbla( "LAPACKE_sstevx_work", info );
90  }
91  } else {
92  info = -1;
93  LAPACKE_xerbla( "LAPACKE_sstevx_work", info );
94  }
95  return info;
96 }
#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_sstevx(char *jobz, char *range, lapack_int *n, float *d, float *e, 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 *iwork, lapack_int *ifail, lapack_int *info)
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#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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