LAPACK  3.5.0
LAPACK: Linear Algebra PACKage
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lapacke_stgexc.c File Reference
#include "lapacke_utils.h"
Include dependency graph for lapacke_stgexc.c:

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Functions/Subroutines

lapack_int LAPACKE_stgexc (int matrix_order, lapack_logical wantq, lapack_logical wantz, lapack_int n, float *a, lapack_int lda, float *b, lapack_int ldb, float *q, lapack_int ldq, float *z, lapack_int ldz, lapack_int *ifst, lapack_int *ilst)

Function/Subroutine Documentation

lapack_int LAPACKE_stgexc ( int  matrix_order,
lapack_logical  wantq,
lapack_logical  wantz,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  q,
lapack_int  ldq,
float *  z,
lapack_int  ldz,
lapack_int ifst,
lapack_int ilst 
)

Definition at line 36 of file lapacke_stgexc.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_stgexc", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_sge_nancheck( matrix_order, n, n, a, lda ) ) {
return -5;
}
if( LAPACKE_sge_nancheck( matrix_order, n, n, b, ldb ) ) {
return -7;
}
if( wantq ) {
if( LAPACKE_sge_nancheck( matrix_order, n, n, q, ldq ) ) {
return -9;
}
}
if( wantz ) {
if( LAPACKE_sge_nancheck( matrix_order, n, n, z, ldz ) ) {
return -11;
}
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_stgexc_work( matrix_order, wantq, wantz, n, a, lda, b, ldb,
q, ldq, z, ldz, ifst, ilst, &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_stgexc_work( matrix_order, wantq, wantz, n, a, lda, b, ldb,
q, ldq, z, ldz, ifst, ilst, work, lwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_stgexc", info );
}
return info;
}

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