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

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Functions/Subroutines

lapack_int LAPACKE_cheevx (int matrix_order, char jobz, char range, char uplo, lapack_int n, lapack_complex_float *a, lapack_int lda, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, lapack_complex_float *z, lapack_int ldz, lapack_int *ifail)

Function/Subroutine Documentation

lapack_int LAPACKE_cheevx ( int  matrix_order,
char  jobz,
char  range,
char  uplo,
lapack_int  n,
lapack_complex_float a,
lapack_int  lda,
float  vl,
float  vu,
lapack_int  il,
lapack_int  iu,
float  abstol,
lapack_int m,
float *  w,
lapack_complex_float z,
lapack_int  ldz,
lapack_int ifail 
)

Definition at line 36 of file lapacke_cheevx.c.

{
lapack_int info = 0;
lapack_int lwork = -1;
lapack_int* iwork = NULL;
float* rwork = NULL;
lapack_complex_float* work = NULL;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_cheevx", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_che_nancheck( matrix_order, uplo, n, a, lda ) ) {
return -6;
}
if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
return -12;
}
if( LAPACKE_lsame( range, 'v' ) ) {
if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
return -8;
}
}
if( LAPACKE_lsame( range, 'v' ) ) {
if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
return -9;
}
}
#endif
/* Allocate memory for working array(s) */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
if( iwork == NULL ) {
goto exit_level_0;
}
rwork = (float*)LAPACKE_malloc( sizeof(float) * MAX(1,7*n) );
if( rwork == NULL ) {
goto exit_level_1;
}
/* Query optimal working array(s) size */
info = LAPACKE_cheevx_work( matrix_order, jobz, range, uplo, n, a, lda, vl,
vu, il, iu, abstol, m, w, z, ldz, &work_query,
lwork, rwork, iwork, ifail );
if( info != 0 ) {
goto exit_level_2;
}
lwork = LAPACK_C2INT( work_query );
/* Allocate memory for work arrays */
if( work == NULL ) {
goto exit_level_2;
}
/* Call middle-level interface */
info = LAPACKE_cheevx_work( matrix_order, jobz, range, uplo, n, a, lda, vl,
vu, il, iu, abstol, m, w, z, ldz, work, lwork,
rwork, iwork, ifail );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_2:
LAPACKE_free( rwork );
exit_level_1:
LAPACKE_free( iwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_cheevx", info );
}
return info;
}

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