LAPACK  3.8.0
LAPACK: Linear Algebra PACKage

◆ LAPACKE_shgeqz()

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

Definition at line 36 of file lapacke_shgeqz.c.

41 {
42  lapack_int info = 0;
43  lapack_int lwork = -1;
44  float* work = NULL;
45  float work_query;
46  if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
47  LAPACKE_xerbla( "LAPACKE_shgeqz", -1 );
48  return -1;
49  }
50 #ifndef LAPACK_DISABLE_NAN_CHECK
51  if( LAPACKE_get_nancheck() ) {
52  /* Optionally check input matrices for NaNs */
53  if( LAPACKE_sge_nancheck( matrix_layout, n, n, h, ldh ) ) {
54  return -8;
55  }
56  if( LAPACKE_lsame( compq, 'i' ) || LAPACKE_lsame( compq, 'v' ) ) {
57  if( LAPACKE_sge_nancheck( matrix_layout, n, n, q, ldq ) ) {
58  return -15;
59  }
60  }
61  if( LAPACKE_sge_nancheck( matrix_layout, n, n, t, ldt ) ) {
62  return -10;
63  }
64  if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
65  if( LAPACKE_sge_nancheck( matrix_layout, n, n, z, ldz ) ) {
66  return -17;
67  }
68  }
69  }
70 #endif
71  /* Query optimal working array(s) size */
72  info = LAPACKE_shgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
73  ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
74  ldz, &work_query, lwork );
75  if( info != 0 ) {
76  goto exit_level_0;
77  }
78  lwork = (lapack_int)work_query;
79  /* Allocate memory for work arrays */
80  work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
81  if( work == NULL ) {
83  goto exit_level_0;
84  }
85  /* Call middle-level interface */
86  info = LAPACKE_shgeqz_work( matrix_layout, job, compq, compz, n, ilo, ihi, h,
87  ldh, t, ldt, alphar, alphai, beta, q, ldq, z,
88  ldz, work, lwork );
89  /* Release memory and exit */
90  LAPACKE_free( work );
91 exit_level_0:
92  if( info == LAPACK_WORK_MEMORY_ERROR ) {
93  LAPACKE_xerbla( "LAPACKE_shgeqz", info );
94  }
95  return info;
96 }
#define LAPACK_ROW_MAJOR
Definition: lapacke.h:119
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:122
lapack_int LAPACKE_shgeqz_work(int matrix_layout, char job, char compq, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, float *h, lapack_int ldh, float *t, lapack_int ldt, float *alphar, float *alphai, float *beta, float *q, lapack_int ldq, float *z, lapack_int ldz, float *work, lapack_int lwork)
#define LAPACKE_free(p)
Definition: lapacke.h:113
lapack_logical LAPACKE_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
#define LAPACKE_malloc(size)
Definition: lapacke.h:110
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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