LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_zpteqr()

lapack_int LAPACKE_zpteqr ( int  matrix_layout,
char  compz,
lapack_int  n,
double *  d,
double *  e,
lapack_complex_double z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_zpteqr.c.

38{
39 lapack_int info = 0;
40 /* Additional scalars declarations for work arrays */
41 lapack_int lwork;
42 double* work = NULL;
43 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
44 LAPACKE_xerbla( "LAPACKE_zpteqr", -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_d_nancheck( n, d, 1 ) ) {
51 return -4;
52 }
53 if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
54 return -5;
55 }
56 if( LAPACKE_lsame( compz, 'v' ) ) {
57 if( LAPACKE_zge_nancheck( matrix_layout, n, n, z, ldz ) ) {
58 return -6;
59 }
60 }
61 }
62#endif
63 /* Additional scalars initializations for work arrays */
64 if( LAPACKE_lsame( compz, 'n' ) ) {
65 lwork = 1;
66 } else {
67 lwork = MAX(1,4*n-4);
68 }
69 /* Allocate memory for working array(s) */
70 work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
71 if( work == NULL ) {
73 goto exit_level_0;
74 }
75 /* Call middle-level interface */
76 info = LAPACKE_zpteqr_work( matrix_layout, compz, n, d, e, z, ldz, work );
77 /* Release memory and exit */
78 LAPACKE_free( work );
79exit_level_0:
80 if( info == LAPACK_WORK_MEMORY_ERROR ) {
81 LAPACKE_xerbla( "LAPACKE_zpteqr", info );
82 }
83 return info;
84}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
lapack_int LAPACKE_zpteqr_work(int matrix_layout, char compz, lapack_int n, double *d, double *e, lapack_complex_double *z, lapack_int ldz, double *work)
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
#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
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:35
void LAPACKE_xerbla(const char *name, lapack_int info)
lapack_logical LAPACKE_zge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_double *a, lapack_int lda)
lapack_logical LAPACKE_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
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