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

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

Function/Subroutine Documentation

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

Definition at line 36 of file lapacke_ssyevr.c.

{
lapack_int info = 0;
lapack_int liwork = -1;
lapack_int lwork = -1;
lapack_int* iwork = NULL;
float* work = NULL;
lapack_int iwork_query;
float work_query;
if( matrix_order != LAPACK_COL_MAJOR && matrix_order != LAPACK_ROW_MAJOR ) {
LAPACKE_xerbla( "LAPACKE_ssyevr", -1 );
return -1;
}
#ifndef LAPACK_DISABLE_NAN_CHECK
/* Optionally check input matrices for NaNs */
if( LAPACKE_ssy_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
/* Query optimal working array(s) size */
info = LAPACKE_ssyevr_work( matrix_order, jobz, range, uplo, n, a, lda, vl,
vu, il, iu, abstol, m, w, z, ldz, isuppz,
&work_query, lwork, &iwork_query, liwork );
if( info != 0 ) {
goto exit_level_0;
}
liwork = (lapack_int)iwork_query;
lwork = (lapack_int)work_query;
/* Allocate memory for work arrays */
iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * liwork );
if( iwork == NULL ) {
goto exit_level_0;
}
work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
if( work == NULL ) {
goto exit_level_1;
}
/* Call middle-level interface */
info = LAPACKE_ssyevr_work( matrix_order, jobz, range, uplo, n, a, lda, vl,
vu, il, iu, abstol, m, w, z, ldz, isuppz, work,
lwork, iwork, liwork );
/* Release memory and exit */
LAPACKE_free( work );
exit_level_1:
LAPACKE_free( iwork );
exit_level_0:
if( info == LAPACK_WORK_MEMORY_ERROR ) {
LAPACKE_xerbla( "LAPACKE_ssyevr", info );
}
return info;
}

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