LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_dpteqr()

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

Definition at line 35 of file lapacke_dpteqr.c.

37{
38 lapack_int info = 0;
39 /* Additional scalars declarations for work arrays */
40 lapack_int lwork;
41 double* work = NULL;
42 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
43 LAPACKE_xerbla( "LAPACKE_dpteqr", -1 );
44 return -1;
45 }
46#ifndef LAPACK_DISABLE_NAN_CHECK
47 if( LAPACKE_get_nancheck() ) {
48 /* Optionally check input matrices for NaNs */
49 if( LAPACKE_d_nancheck( n, d, 1 ) ) {
50 return -4;
51 }
52 if( LAPACKE_d_nancheck( n-1, e, 1 ) ) {
53 return -5;
54 }
55 if( LAPACKE_lsame( compz, 'v' ) ) {
56 if( LAPACKE_dge_nancheck( matrix_layout, n, n, z, ldz ) ) {
57 return -6;
58 }
59 }
60 }
61#endif
62 /* Additional scalars initializations for work arrays */
63 if( LAPACKE_lsame( compz, 'n' ) ) {
64 lwork = 1;
65 } else {
66 lwork = MAX(1,4*n-4);
67 }
68 /* Allocate memory for working array(s) */
69 work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
70 if( work == NULL ) {
72 goto exit_level_0;
73 }
74 /* Call middle-level interface */
75 info = LAPACKE_dpteqr_work( matrix_layout, compz, n, d, e, z, ldz, work );
76 /* Release memory and exit */
77 LAPACKE_free( work );
78exit_level_0:
79 if( info == LAPACK_WORK_MEMORY_ERROR ) {
80 LAPACKE_xerbla( "LAPACKE_dpteqr", info );
81 }
82 return info;
83}
#define lapack_int
Definition: lapack.h:87
lapack_int LAPACKE_dpteqr_work(int matrix_layout, char compz, lapack_int n, double *d, double *e, double *z, lapack_int ldz, double *work)
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#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_d_nancheck(lapack_int n, const double *x, lapack_int incx)
#define MAX(x, y)
Definition: lapacke_utils.h:46
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
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