LAPACK  3.10.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dspgvx_work()

lapack_int LAPACKE_dspgvx_work ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
double *  ap,
double *  bp,
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_dspgvx_work.c.

42 {
43  lapack_int info = 0;
44  if( matrix_layout == LAPACK_COL_MAJOR ) {
45  /* Call LAPACK function and adjust info */
46  LAPACK_dspgvx( &itype, &jobz, &range, &uplo, &n, ap, bp, &vl, &vu, &il,
47  &iu, &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  double* z_t = NULL;
57  double* ap_t = NULL;
58  double* bp_t = NULL;
59  /* Check leading dimension(s) */
60  if( ldz < ncols_z ) {
61  info = -17;
62  LAPACKE_xerbla( "LAPACKE_dspgvx_work", info );
63  return info;
64  }
65  /* Allocate memory for temporary array(s) */
66  if( LAPACKE_lsame( jobz, 'v' ) ) {
67  z_t = (double*)
68  LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,ncols_z) );
69  if( z_t == NULL ) {
71  goto exit_level_0;
72  }
73  }
74  ap_t = (double*)
75  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
76  if( ap_t == NULL ) {
78  goto exit_level_1;
79  }
80  bp_t = (double*)
81  LAPACKE_malloc( sizeof(double) * ( MAX(1,n) * MAX(2,n+1) ) / 2 );
82  if( bp_t == NULL ) {
84  goto exit_level_2;
85  }
86  /* Transpose input matrices */
87  LAPACKE_dsp_trans( matrix_layout, uplo, n, ap, ap_t );
88  LAPACKE_dsp_trans( matrix_layout, uplo, n, bp, bp_t );
89  /* Call LAPACK function and adjust info */
90  LAPACK_dspgvx( &itype, &jobz, &range, &uplo, &n, ap_t, bp_t, &vl, &vu,
91  &il, &iu, &abstol, m, w, z_t, &ldz_t, work, iwork, ifail,
92  &info );
93  if( info < 0 ) {
94  info = info - 1;
95  }
96  /* Transpose output matrices */
97  if( LAPACKE_lsame( jobz, 'v' ) ) {
98  LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
99  ldz );
100  }
101  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, ap_t, ap );
102  LAPACKE_dsp_trans( LAPACK_COL_MAJOR, uplo, n, bp_t, bp );
103  /* Release memory and exit */
104  LAPACKE_free( bp_t );
105 exit_level_2:
106  LAPACKE_free( ap_t );
107 exit_level_1:
108  if( LAPACKE_lsame( jobz, 'v' ) ) {
109  LAPACKE_free( z_t );
110  }
111 exit_level_0:
112  if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
113  LAPACKE_xerbla( "LAPACKE_dspgvx_work", info );
114  }
115  } else {
116  info = -1;
117  LAPACKE_xerbla( "LAPACKE_dspgvx_work", info );
118  }
119  return info;
120 }
#define lapack_int
Definition: lapack.h:83
#define LAPACK_dspgvx(...)
Definition: lapack.h:15552
#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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