LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_chgeqz()

lapack_int LAPACKE_chgeqz ( int  matrix_layout,
char  job,
char  compq,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
lapack_complex_float h,
lapack_int  ldh,
lapack_complex_float t,
lapack_int  ldt,
lapack_complex_float alpha,
lapack_complex_float beta,
lapack_complex_float q,
lapack_int  ldq,
lapack_complex_float z,
lapack_int  ldz 
)

Definition at line 36 of file lapacke_chgeqz.c.

44 {
45  lapack_int info = 0;
46  lapack_int lwork = -1;
47  float* rwork = NULL;
48  lapack_complex_float* work = NULL;
49  lapack_complex_float work_query;
50  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
51  LAPACKE_xerbla( "LAPACKE_chgeqz", -1 );
52  return -1;
53  }
54 #ifndef LAPACK_DISABLE_NAN_CHECK
55  if( LAPACKE_get_nancheck() ) {
56  /* Optionally check input matrices for NaNs */
57  if( LAPACKE_cge_nancheck( matrix_layout, n, n, h, ldh ) ) {
58  return -8;
59  }
60  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
61  if( LAPACKE_cge_nancheck( matrix_layout, n, n, q, ldq ) ) {
62  return -14;
63  }
64  }
65  if( LAPACKE_cge_nancheck( matrix_layout, n, n, t, ldt ) ) {
66  return -10;
67  }
68  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
69  if( LAPACKE_cge_nancheck( matrix_layout, n, n, z, ldz ) ) {
70  return -16;
71  }
72  }
73  }
74 #endif
75  /* Allocate memory for working array(s) */
76  rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,n) );
77  if( rwork == NULL ) {
79  goto exit_level_0;
80  }
81  /* Query optimal working array(s) size */
82  info = LAPACKE_chgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
83  ldh, t, ldt, alpha, beta, q, ldq, z, ldz,
84  &work_query, lwork, rwork );
85  if( info != 0 ) {
86  goto exit_level_1;
87  }
88  lwork = LAPACK_C2INT( work_query );
89  /* Allocate memory for work arrays */
90  work = (lapack_complex_float*)
91  LAPACKE_malloc( sizeof(lapack_complex_float) * lwork );
92  if( work == NULL ) {
94  goto exit_level_1;
95  }
96  /* Call middle-level interface */
97  info = LAPACKE_chgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
98  ldh, t, ldt, alpha, beta, q, ldq, z, ldz, work,
99  lwork, rwork );
100  /* Release memory and exit */
101  LAPACKE_free( work );
102 exit_level_1:
103  LAPACKE_free( rwork );
104 exit_level_0:
105  if( info == LAPACK_WORK_MEMORY_ERROR ) {
106  LAPACKE_xerbla( "LAPACKE_chgeqz", info );
107  }
108  return info;
109 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_int LAPACKE_chgeqz_work(int matrix_layout, char job, char compq, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, lapack_complex_float *h, lapack_int ldh, lapack_complex_float *t, lapack_int ldt, lapack_complex_float *alpha, lapack_complex_float *beta, lapack_complex_float *q, lapack_int ldq, lapack_complex_float *z, lapack_int ldz, lapack_complex_float *work, lapack_int lwork, float *rwork)
#define lapack_complex_float
Definition: lapacke.h:74
lapack_logical LAPACKE_cge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const lapack_complex_float *a, lapack_int lda)
#define MAX(x, y)
Definition: lapacke_utils.h:47
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
#define LAPACK_C2INT(x)
Definition: lapacke.h:116
lapack_logical LAPACKE_lsame(char ca, char cb)
Definition: lapacke_lsame.c:36
#define LAPACK_COL_MAJOR
Definition: lapacke.h:120
void LAPACKE_xerbla(const char *name, lapack_int info)
#define lapack_int
Definition: lapacke.h:47
int LAPACKE_get_nancheck()
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