LAPACK  3.5.0
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lapacke_cgehrd.c File Reference
#include "lapacke_utils.h"
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Functions/Subroutines

lapack_int LAPACKE_cgehrd (int matrix_order, lapack_int n, lapack_int ilo, lapack_int ihi, lapack_complex_float *a, lapack_int lda, lapack_complex_float *tau)

Function/Subroutine Documentation

lapack_int LAPACKE_cgehrd ( int  matrix_order,
lapack_int  n,
lapack_int  ilo,
lapack_int  ihi,
lapack_complex_float a,
lapack_int  lda,
lapack_complex_float tau 
)

Definition at line 36 of file lapacke_cgehrd.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
lapack_complex_float* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_cgehrd", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_cge_nancheck( matrix_order, n, n, a, lda ) ) {
return -5;
}
#endif
/* Query optimal working array(s) size */
info = LAPACKE_cgehrd_work( matrix_order, n, ilo, ihi, a, lda, tau,
&work_query, lwork );
if( info != 0 ) {
goto exit_level_0;
}
lwork = LAPACK_C2INT( work_query );
/* Allocate memory for work arrays */
if( work == NULL ) {
goto exit_level_0;
}
/* Call middle-level interface */
info = LAPACKE_cgehrd_work( matrix_order, n, ilo, ihi, a, lda, tau, work,
lwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cgehrd", info );
}
return info;
}

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