LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_chegvd()

lapack_int LAPACKE_chegvd ( int  matrix_layout,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float b,
lapack_int  ldb,
float *  w 
)

Definition at line 35 of file lapacke_chegvd.c.

39{
40 lapack_int info = 0;
41 lapack_int liwork = -1;
42 lapack_int lrwork = -1;
43 lapack_int lwork = -1;
44 lapack_int* iwork = NULL;
45 float* rwork = NULL;
46 lapack_complex_float* work = NULL;
47 lapack_int iwork_query;
48 float rwork_query;
49 lapack_complex_float work_query;
50 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51 LAPACKE_xerbla( "LAPACKE_chegvd", -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 -6;
59 }
60 if( LAPACKE_che_nancheck( matrix_layout, uplo, n, b, ldb ) ) {
61 return -8;
62 }
63 }
64#endif
65 /* Query optimal working array(s) size */
66 info = LAPACKE_chegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
67 ldb, w, &work_query, lwork, &rwork_query,
68 lrwork, &iwork_query, liwork );
69 if( info != 0 ) {
70 goto exit_level_0;
71 }
72 liwork = iwork_query;
73 lrwork = (lapack_int)rwork_query;
74 lwork = LAPACK_C2INT( work_query );
75 /* Allocate memory for work arrays */
76 iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
77 if( iwork == NULL ) {
79 goto exit_level_0;
80 }
81 rwork = (float*)LAPACKE_malloc( sizeof(float) * lrwork );
82 if( rwork == NULL ) {
84 goto exit_level_1;
85 }
86 work = (lapack_complex_float*)
87 LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
88 if( work == NULL ) {
90 goto exit_level_2;
91 }
92 /* Call middle-level interface */
93 info = LAPACKE_chegvd_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
94 ldb, w, work, lwork, rwork, lrwork, iwork,
95 liwork );
96 /* Release memory and exit */
97 LAPACKE_free( work );
98exit_level_2:
99 LAPACKE_free( rwork );
100exit_level_1:
101 LAPACKE_free( iwork );
102exit_level_0:
103 if( info == LAPACK_WORK_MEMORY_ERROR ) {
104 LAPACKE_xerbla( "LAPACKE_chegvd", info );
105 }
106 return info;
107}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_float
Definition: lapack.h:46
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
lapack_int LAPACKE_chegvd_work(int matrix_layout, lapack_int itype, char jobz, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, lapack_complex_float *b, lapack_int ldb, float *w, lapack_complex_float *work, lapack_int lwork, float *rwork, lapack_int lrwork, lapack_int *iwork, lapack_int liwork)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#define LAPACK_C2INT(x)
Definition: lapacke.h:49
#define LAPACKE_free(p)
Definition: lapacke.h:46
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:52
int LAPACKE_get_nancheck(void)
#define LAPACKE_malloc(size)
Definition: lapacke.h:43
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)
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