LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chegvx()

lapack_int LAPACKE_chegvx ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
lapack_complex_float z,
lapack_int  ldz,
lapack_int ifail 
)

Definition at line 36 of file lapacke_chegvx.c.

43 {
44  lapack_int info = 0;
45  lapack_int lwork = -1;
46  lapack_int* iwork = NULL;
47  float* rwork = NULL;
48  lapack_complex_float* work = NULL;
49  lapack_complex_float work_query;
50  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51  LAPACKE_xerbla( "LAPACKE_chegvx", -1 );
52  return -1;
53  }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55  if( LAPACKE_get_nancheck() ) {
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
58  return -7;
59  }
60  if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
61  return -15;
62  }
63  if( LAPACKE_cge_nancheck( matrix_layout, n, n, b, ldb ) ) {
64  return -9;
65  }
66  if( LAPACKE_lsame( range, 'v' ) ) {
67  if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
68  return -11;
69  }
70  }
71  if( LAPACKE_lsame( range, 'v' ) ) {
72  if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
73  return -12;
74  }
75  }
76  }
77 #endif
78  /* Allocate memory for working array(s) */
79  iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
80  if( iwork == NULL ) {
82  goto exit_level_0;
83  }
84  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,7*n) );
85  if( rwork == NULL ) {
87  goto exit_level_1;
88  }
89  /* Query optimal working array(s) size */
90  info = LAPACKE_chegvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
91  lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
92  ldz, &work_query, lwork, rwork, iwork, ifail );
93  if( info != 0 ) {
94  goto exit_level_2;
95  }
96  lwork = LAPACK_C2INT( work_query );
97  /* Allocate memory for work arrays */
98  work = (lapack_complex_float*)
99  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
100  if( work == NULL ) {
102  goto exit_level_2;
103  }
104  /* Call middle-level interface */
105  info = LAPACKE_chegvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
106  lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
107  ldz, work, lwork, rwork, iwork, ifail );
108  /* Release memory and exit */
109  LAPACKE_free( work );
110 exit_level_2:
111  LAPACKE_free( rwork );
112 exit_level_1:
113  LAPACKE_free( iwork );
114 exit_level_0:
115  if( info == LAPACK_WORK_MEMORY_ERROR ) {
116  LAPACKE_xerbla( "LAPACKE_chegvx", info );
117  }
118  return info;
119 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
#define lapack_complex_float
Definition: lapacke.h:74
lapack_logical LAPACKE_s_nancheck(lapack_int n, const float *x, lapack_int incx)
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
lapack_int LAPACKE_chegvx_work(int matrix_layout, lapack_int itype, char jobz, char range, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, lapack_complex_float *b, lapack_int ldb, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, lapack_complex_float *z, lapack_int ldz, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int *iwork, lapack_int *ifail)
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)
lapack_logical LAPACKE_che_nancheck(int matrix_layout, char uplo, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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