LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_sspevx_work()

lapack_int LAPACKE_sspevx_work ( int  matrix_layout,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
float *  ap,
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_sspevx_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_sspevx( &jobz, &range, &uplo, &n, ap, &vl, &vu, &il, &iu,
47  &abstol, m, 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  float* ap_t = NULL;
58  /* Check leading dimension(s) */
59  if( ldz < ncols_z ) {
60  info = -15;
61  LAPACKE_xerbla( "LAPACKE_sspevx_work", info );
62  return info;
63  }
64  /* Allocate memory for temporary array(s) */
65  if( LAPACKE_lsame( jobz, 'v' ) ) {
66  z_t = (float*)
67  LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
68  if( z_t == NULL ) {
70  goto exit_level_0;
71  }
72  }
73  ap_t = (float*)
74  LAPACKE_malloc( sizeof(float) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
75  if( ap_t == NULL ) {
77  goto exit_level_1;
78  }
79  /* Transpose input matrices */
80  LAPACKE_ssp_trans( matrix_layout, uplo, n, ap, ap_t );
81  /* Call LAPACK function and adjust info */
82  LAPACK_sspevx( &jobz, &range, &uplo, &n, ap_t, &vl, &vu, &il, &iu,
83  &abstol, m, w, z_t, &ldz_t, work, iwork, ifail, &info );
84  if( info < 0 ) {
85  info = info - 1;
86  }
87  /* Transpose output matrices */
88  if( LAPACKE_lsame( jobz, 'v' ) ) {
89  LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
90  ldz );
91  }
92  LAPACKE_ssp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
93  /* Release memory and exit */
94  LAPACKE_free( ap_t );
95 exit_level_1:
96  if( LAPACKE_lsame( jobz, 'v' ) ) {
97  LAPACKE_free( z_t );
98  }
99 exit_level_0:
100  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
101  LAPACKE_xerbla( "LAPACKE_sspevx_work", info );
102  }
103  } else {
104  info = -1;
105  LAPACKE_xerbla( "LAPACKE_sspevx_work", info );
106  }
107  return info;
108 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_ssp_trans(int matrix_layout, char uplo, lapack_int n, const float *in, float *out)
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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
void LAPACK_sspevx(char *jobz, char *range, char *uplo, lapack_int *n, float *ap, 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)
#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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