LAPACK  3.10.1
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspevx_work()

lapack_int LAPACKE_dspevx_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
double *  ap,
double  vl,
double  vu,
lapack_int  il,
lapack_int  iu,
double  abstol,
lapack_int m,
double *  w,
double *  z,
lapack_int  ldz,
double *  work,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 35 of file lapacke_dspevx_work.c.

41 {
42  lapack_int info = 0;
43  if( matrix_layout == LAPACK_COL_MAJOR ) {
44  /* Call LAPACK function and adjust info */
45  LAPACK_dspevx( &jobz, &range, &uplo, &n, ap, &vl, &vu, &il, &iu,
46  &abstol, m, w, z, &ldz, work, iwork, ifail, &info );
47  if( info < 0 ) {
48  info = info - 1;
49  }
50  } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
51  lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
52  LAPACKE_lsame( range, 'v' ) ) ? n :
53  ( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
54  lapack_int ldz_t = MAX(1,n);
55  double* z_t = NULL;
56  double* ap_t = NULL;
57  /* Check leading dimension(s) */
58  if( ldz < ncols_z ) {
59  info = -15;
60  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
61  return info;
62  }
63  /* Allocate memory for temporary array(s) */
64  if( LAPACKE_lsame( jobz, 'v' ) ) {
65  z_t = (double*)
66  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
67  if( z_t == NULL ) {
69  goto exit_level_0;
70  }
71  }
72  ap_t = (double*)
73  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
74  if( ap_t == NULL ) {
76  goto exit_level_1;
77  }
78  /* Transpose input matrices */
79  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
80  /* Call LAPACK function and adjust info */
81  LAPACK_dspevx( &jobz, &range, &uplo, &n, ap_t, &vl, &vu, &il, &iu,
82  &abstol, m, w, z_t, &ldz_t, work, iwork, ifail, &info );
83  if( info < 0 ) {
84  info = info - 1;
85  }
86  /* Transpose output matrices */
87  if( LAPACKE_lsame( jobz, 'v' ) ) {
88  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
89  ldz );
90  }
91  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
92  /* Release memory and exit */
93  LAPACKE_free( ap_t );
94 exit_level_1:
95  if( LAPACKE_lsame( jobz, 'v' ) ) {
96  LAPACKE_free( z_t );
97  }
98 exit_level_0:
99  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
100  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
101  }
102  } else {
103  info = -1;
104  LAPACKE_xerbla( "LAPACKE_dspevx_work", info );
105  }
106  return info;
107 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dspevx(...)
Definition: lapack.h:15389
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
void LAPACKE_dsp_trans(int matrix_layout, char uplo, lapack_int n, const double *in, double *out)
#define MAX(x, y)
Definition: lapacke_utils.h:46
void LAPACKE_dge_trans(int matrix_layout, lapack_int m, lapack_int n, const double *in, lapack_int ldin, double *out, lapack_int ldout)
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