LAPACK 3.11.0
LAPACK: Linear Algebra PACKage
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◆ LAPACKE_shseqr()

lapack_int LAPACKE_shseqr ( int  matrix_layout,
char  job,
char  compz,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
float *  h,
lapack_int  ldh,
float *  wr,
float *  wi,
float *  z,
lapack_int  ldz 
)

Definition at line 35 of file lapacke_shseqr.c.

39{
40 lapack_int info = 0;
41 lapack_int lwork = -1;
42 float* work = NULL;
43 float work_query;
44 if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
45 LAPACKE_xerbla( "LAPACKE_shseqr", -1 );
46 return -1;
47 }
48#ifndef LAPACK_DISABLE_NAN_CHECK
49 if( LAPACKE_get_nancheck() ) {
50 /* Optionally check input matrices for NaNs */
51 if( LAPACKE_sge_nancheck( matrix_layout, n, n, h, ldh ) ) {
52 return -7;
53 }
54 if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
55 if( LAPACKE_sge_nancheck( matrix_layout, n, n, z, ldz ) ) {
56 return -11;
57 }
58 }
59 }
60#endif
61 /* Query optimal working array(s) size */
62 info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
63 wr, wi, z, ldz, &work_query, lwork );
64 if( info != 0 ) {
65 goto exit_level_0;
66 }
67 lwork = (lapack_int)work_query;
68 /* Allocate memory for work arrays */
69 work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
70 if( work == NULL ) {
72 goto exit_level_0;
73 }
74 /* Call middle-level interface */
75 info = LAPACKE_shseqr_work( matrix_layout, job, compz, n, ilo, ihi, h, ldh,
76 wr, wi, z, ldz, work, lwork );
77 /* Release memory and exit */
78 LAPACKE_free( work );
79exit_level_0:
80 if( info == LAPACK_WORK_MEMORY_ERROR ) {
81 LAPACKE_xerbla( "LAPACKE_shseqr", info );
82 }
83 return info;
84}
#define lapack_int
Definition: lapack.h:87
#define LAPACK_WORK_MEMORY_ERROR
Definition: lapacke.h:55
#define LAPACK_COL_MAJOR
Definition: lapacke.h:53
lapack_int LAPACKE_shseqr_work(int matrix_layout, char job, char compz, lapack_int n, lapack_int ilo, lapack_int ihi, float *h, lapack_int ldh, float *wr, float *wi, float *z, lapack_int ldz, float *work, lapack_int lwork)
#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_sge_nancheck(int matrix_layout, lapack_int m, lapack_int n, const float *a, lapack_int lda)
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