lapacke_ssygvx.c File Reference

#include "lapacke_utils.h"

Go to the source code of this file.

Functions
lapack_int	LAPACKE_ssygvx (int matrix_layout, lapack_int itype, char jobz, char range, char uplo, lapack_int n, float *a, lapack_int lda, float *b, lapack_int ldb, float vl, float vu, lapack_int il, lapack_int iu, float abstol, lapack_int *m, float *w, float *z, lapack_int ldz, lapack_int *ifail)

Function Documentation

LAPACKE_ssygvx()

lapack_int LAPACKE_ssygvx	(	int	matrix_layout,
		lapack_int	itype,
		char	jobz,
		char	range,
		char	uplo,
		lapack_int	n,
		float *	a,
		lapack_int	lda,
		float *	b,
		lapack_int	ldb,
		float	vl,
		float	vu,
		lapack_int	il,
		lapack_int	iu,
		float	abstol,
		lapack_int *	m,
		float *	w,
		float *	z,
		lapack_int	ldz,
		lapack_int *	ifail )

Definition at line 35 of file lapacke_ssygvx.c.

{
    lapack_int info = 0;
    lapack_int lwork = -1;
    lapack_int* iwork = NULL;
    float* work = NULL;
    float work_query;
    if( matrix_layout != LAPACK_COL_MAJOR && matrix_layout != LAPACK_ROW_MAJOR ) {
        LAPACKE_xerbla( "LAPACKE_ssygvx", -1 );
        return -1;
    }
#ifndef LAPACK_DISABLE_NAN_CHECK
    if( LAPACKE_get_nancheck() ) {
        /* Optionally check input matrices for NaNs */
        if( LAPACKE_ssy_nancheck( matrix_layout, uplo, n, a, lda ) ) {
            return -7;
        }
        if( LAPACKE_s_nancheck( 1, &abstol, 1 ) ) {
            return -15;
        }
        if( LAPACKE_ssy_nancheck( matrix_layout, uplo, n, b, ldb ) ) {
            return -9;
        }
        if( LAPACKE_lsame( range, 'v' ) ) {
            if( LAPACKE_s_nancheck( 1, &vl, 1 ) ) {
                return -11;
            }
        }
        if( LAPACKE_lsame( range, 'v' ) ) {
            if( LAPACKE_s_nancheck( 1, &vu, 1 ) ) {
                return -12;
            }
        }
    }
#endif
    /* Allocate memory for working array(s) */
    iwork = (lapack_int*)LAPACKE_malloc( sizeof(lapack_int) * MAX(1,5*n) );
    if( iwork == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_0;
    }
    /* Query optimal working array(s) size */
    info = LAPACKE_ssygvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
                                lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
                                ldz, &work_query, lwork, iwork, ifail );
    if( info != 0 ) {
        goto exit_level_1;
    }
    lwork = (lapack_int)work_query;
    /* Allocate memory for work arrays */
    work = (float*)LAPACKE_malloc( sizeof(float) * lwork );
    if( work == NULL ) {
        info = LAPACK_WORK_MEMORY_ERROR;
        goto exit_level_1;
    }
    /* Call middle-level interface */
    info = LAPACKE_ssygvx_work( matrix_layout, itype, jobz, range, uplo, n, a,
                                lda, b, ldb, vl, vu, il, iu, abstol, m, w, z,
                                ldz, work, lwork, iwork, ifail );
    /* 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_ssygvx", info );
    }
    return info;
}