LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_shseqr.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_shseqr (int matrix_order, 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)

Function/Subroutine Documentation

lapack_int LAPACKE_shseqr ( int  matrix_order,
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 36 of file lapacke_shseqr.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
float* work = NULL;
float work_query;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_shseqr", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_sge_nancheck( matrix_order, n, n, h, ldh ) ) {
return -7;
}
if( LAPACKE_lsame( compz, 'i' ) || LAPACKE_lsame( compz, 'v' ) ) {
if( LAPACKE_sge_nancheck( matrix_order, n, n, z, ldz ) ) {
return -11;
}
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_shseqr_work( matrix_order, job, compz, n, ilo, ihi, h, ldh,
wr, wi, z, ldz, &work_query, lwork );
if( info != 0 ) {
goto exit_level_0;
}
lwork = (lapack_int)work_query;
/* Allocate memory for work arrays */
work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
if( work == NULL ) {
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_shseqr_work( matrix_order, job, compz, n, ilo, ihi, h, ldh,
wr, wi, z, ldz, work, lwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_shseqr", info );
}
return info;
}

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