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

lapack_int LAPACKE_ssygvx_work (int matrix_order, 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, float *work, lapack_int lwork, lapack_int *iwork, lapack_int *ifail)

Function/Subroutine Documentation

lapack_int LAPACKE_ssygvx_work ( int  matrix_order,
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,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int ifail 
)

Definition at line 36 of file lapacke_ssygvx_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ssygvx( &itype, &jobz, &range, &uplo, &n, a, &lda, b, &ldb, &vl,
&vu, &il, &iu, &abstol, m, w, z, &ldz, work, &lwork,
iwork, ifail, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int ncols_z = ( LAPACKE_lsame( range, 'a' ) ||
LAPACKE_lsame( range, 'v' ) ) ? n :
( LAPACKE_lsame( range, 'i' ) ? (iu-il+1) : 1);
lapack_int lda_t = MAX(1,n);
lapack_int ldb_t = MAX(1,n);
lapack_int ldz_t = MAX(1,n);
float* a_t = NULL;
float* b_t = NULL;
float* z_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -8;
LAPACKE_xerbla( "LAPACKE_ssygvx_work", info );
return info;
}
if( ldb < n ) {
info = -10;
LAPACKE_xerbla( "LAPACKE_ssygvx_work", info );
return info;
}
if( ldz < ncols_z ) {
info = -19;
LAPACKE_xerbla( "LAPACKE_ssygvx_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( lwork == -1 ) {
LAPACK_ssygvx( &itype, &jobz, &range, &uplo, &n, a, &lda_t, b,
&ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z, &ldz_t,
work, &lwork, iwork, ifail, &info );
return (info < 0) ? (info - 1) : info;
}
/* Allocate memory for temporary array(s) */
a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
if( a_t == NULL ) {
goto exit_level_0;
}
b_t = (float*)LAPACKE_malloc( sizeof(float) * ldb_t * MAX(1,n) );
if( b_t == NULL ) {
goto exit_level_1;
}
if( LAPACKE_lsame( jobz, 'v' ) ) {
z_t = (float*)
LAPACKE_malloc( sizeof(float) * ldz_t * MAX(1,ncols_z) );
if( z_t == NULL ) {
goto exit_level_2;
}
}
/* Transpose input matrices */
LAPACKE_ssy_trans( matrix_order, uplo, n, a, lda, a_t, lda_t );
LAPACKE_sge_trans( matrix_order, n, n, b, ldb, b_t, ldb_t );
/* Call LAPACK function and adjust info */
LAPACK_ssygvx( &itype, &jobz, &range, &uplo, &n, a_t, &lda_t, b_t,
&ldb_t, &vl, &vu, &il, &iu, &abstol, m, w, z_t, &ldz_t,
work, &lwork, iwork, ifail, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_ssy_trans( LAPACK_COL_MAJOR, uplo, n, a_t, lda_t, a, lda );
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, ncols_z, z_t, ldz_t, z,
ldz );
}
/* Release memory and exit */
if( LAPACKE_lsame( jobz, 'v' ) ) {
LAPACKE_free( z_t );
}
exit_level_2:
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ssygvx_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ssygvx_work", info );
}
return info;
}

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