LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_cheev()

lapack_int LAPACKE_cheev ( int  matrix_layout,
char  jobz,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float *  w 
)

Definition at line 35 of file lapacke_cheev.c.

37{
38 lapack_int info = 0;
39 lapack_int lwork = -1;
40 float* rwork = NULL;
41 lapack_complex_float* work = NULL;
42 lapack_complex_float work_query;
43 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44 LAPACKE_xerbla( "LAPACKE_cheev", -1 );
45 return -1;
46 }
47#ifndef LAPACK_DISABLE_NAN_CHECK
48 if( LAPACKE_get_nancheck() ) {
49 /* Optionally check input matrices for NaNs */
50 if( LAPACKE_che_nancheck( matrix_layout, uplo, n, a, lda ) ) {
51 return -5;
52 }
53 }
54#endif
55 /* Allocate memory for working array(s) */
56 rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,3*n-2) );
57 if( rwork == NULL ) {
59 goto exit_level_0;
60 }
61 /* Query optimal working array(s) size */
62 info = LAPACKE_cheev_work( matrix_layout, jobz, uplo, n, a, lda, w,
63 &work_query, lwork, rwork );
64 if( info != 0 ) {
65 goto exit_level_1;
66 }
67 lwork = LAPACK_C2INT( work_query );
68 /* Allocate memory for work arrays */
69 work = (lapack_complex_float*)
70 LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
71 if( work == NULL ) {
73 goto exit_level_1;
74 }
75 /* Call middle-level interface */
76 info = LAPACKE_cheev_work( matrix_layout, jobz, uplo, n, a, lda, w, work,
77 lwork, rwork );
78 /* Release memory and exit */
79 LAPACKE_free( work );
80exit_level_1:
81 LAPACKE_free( rwork );
82exit_level_0:
83 if( info == LAPACK_WORK_MEMORY_ERROR ) {
84 LAPACKE_xerbla( "LAPACKE_cheev", info );
85 }
86 return info;
87}
#define lapack_int
Definition: lapack.h:87
#define lapack_complex_float
Definition: lapack.h:46
lapack_int LAPACKE_cheev_work(int matrix_layout, char jobz, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, float *w, lapack_complex_float *work, lapack_int lwork, float *rwork)
#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)
#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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