LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_dhgeqz()

lapack_int LAPACKE_dhgeqz ( int  matrix_layout,
char  job,
char  compq,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
double *  h,
lapack_int  ldh,
double *  t,
lapack_int  ldt,
double *  alphar,
double *  alphai,
double *  beta,
double *  q,
lapack_int  ldq,
double *  z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_dhgeqz.c.

42 {
43  lapack_int info = 0;
44  lapack_int lwork = -1;
45  double* work = NULL;
46  double work_query;
47  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
48  LAPACKE_xerbla( "LAPACKE_dhgeqz", -1 );
49  return -1;
50  }
51 #ifndef LAPACK_DISABLE_NAN_CHECK
52  if( LAPACKE_get_nancheck() ) {
53  /* Optionally check input matrices for NaNs */
54  if( LAPACKE_dge_nancheck( matrix_layout, n, n, h, ldh ) ) {
55  return -8;
56  }
57  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
58  if( LAPACKE_dge_nancheck( matrix_layout, n, n, q, ldq ) ) {
59  return -15;
60  }
61  }
62  if( LAPACKE_dge_nancheck( matrix_layout, n, n, t, ldt ) ) {
63  return -10;
64  }
65  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
66  if( LAPACKE_dge_nancheck( matrix_layout, n, n, z, ldz ) ) {
67  return -17;
68  }
69  }
70  }
71 #endif
72  /* Query optimal working array(s) size */
73  info = LAPACKE_dhgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
74  ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
75  ldz, &work_query, lwork );
76  if( info != 0 ) {
77  goto exit_level_0;
78  }
79  lwork = (lapack_int)work_query;
80  /* Allocate memory for work arrays */
81  work = (double*)LAPACKE_malloc( sizeof(double) * lwork );
82  if( work == NULL ) {
84  goto exit_level_0;
85  }
86  /* Call middle-level interface */
87  info = LAPACKE_dhgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
88  ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
89  ldz, work, lwork );
90  /* Release memory and exit */
91  LAPACKE_free( work );
92 exit_level_0:
93  if( info == LAPACK_WORK_MEMORY_ERROR ) {
94  LAPACKE_xerbla( "LAPACKE_dhgeqz", info );
95  }
96  return info;
97 }
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
lapack_int LAPACKE_dhgeqz_work(int matrix_layout, char job, char compq, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, double *h, lapack_int ldh, double *t, lapack_int ldt, double *alphar, double *alphai, double *beta, double *q, lapack_int ldq, double *z, lapack_int ldz, double *work, lapack_int lwork)
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
lapack_logical LAPACKE_dge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const double *a, lapack_int lda)
int LAPACKE_get_nancheck()
#define lapack_int
Definition: lapacke.h:47
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACKE_free(p)
Definition: lapacke.h:113
void LAPACKE_xerbla(const char *name, lapack_int info)
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