LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_chegv()

lapack_int LAPACKE_chegv ( 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_chegv.c.

39{
40 lapack_int info = 0;
41 lapack_int lwork = -1;
42 float* rwork = NULL;
43 lapack_complex_float* work = NULL;
44 lapack_complex_float work_query;
45 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
46 LAPACKE_xerbla( "LAPACKE_chegv", -1 );
47 return -1;
48 }
49#ifndef LAPACK_DISABLE_NAN_CHECK
50 if( LAPACKE_get_nancheck() ) {
51 /* Optionally check input matrices for NaNs */
52 if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
53 return -6;
54 }
55 if( LAPACKE_che_nancheck( matrix_layout, uplo, n, b, ldb ) ) {
56 return -8;
57 }
58 }
59#endif
60 /* Allocate memory for working array(s) */
61 rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n-2) );
62 if( rwork == NULL ) {
64 goto exit_level_0;
65 }
66 /* Query optimal working array(s) size */
67 info = LAPACKE_chegv_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
68 ldb, w, &work_query, lwork, rwork );
69 if( info != 0 ) {
70 goto exit_level_1;
71 }
72 lwork = LAPACK_C2INT( work_query );
73 /* Allocate memory for work arrays */
74 work = (lapack_complex_float*)
75 LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
76 if( work == NULL ) {
78 goto exit_level_1;
79 }
80 /* Call middle-level interface */
81 info = LAPACKE_chegv_work( matrix_layout, itype, jobz, uplo, n, a, lda, b,
82 ldb, w, work, lwork, rwork );
83 /* Release memory and exit */
84 LAPACKE_free( work );
85exit_level_1:
86 LAPACKE_free( rwork );
87exit_level_0:
88 if( info == LAPACK_WORK_MEMORY_ERROR ) {
89 LAPACKE_xerbla( "LAPACKE_chegv", info );
90 }
91 return info;
92}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_float
Definition: lapack.h:46
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#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)
lapack_int LAPACKE_chegv_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)
#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)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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