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

lapack_int LAPACKE_ssygvd_work (int matrix_order, lapack_int itype, char jobz, char uplo, lapack_int n, float *a, lapack_int lda, float *b, lapack_int ldb, float *w, float *work, lapack_int lwork, lapack_int *iwork, lapack_int liwork)

Function/Subroutine Documentation

lapack_int LAPACKE_ssygvd_work ( int  matrix_order,
lapack_int  itype,
char  jobz,
char  uplo,
lapack_int  n,
float *  a,
lapack_int  lda,
float *  b,
lapack_int  ldb,
float *  w,
float *  work,
lapack_int  lwork,
lapack_int iwork,
lapack_int  liwork 
)

Definition at line 36 of file lapacke_ssygvd_work.c.

{
lapack_int info = 0;
if( matrix_order == LAPACK_COL_MAJOR ) {
/* Call LAPACK function and adjust info */
LAPACK_ssygvd( &itype, &jobz, &uplo, &n, a, &lda, b, &ldb, w, work,
&lwork, iwork, &liwork, &info );
if( info < 0 ) {
info = info - 1;
}
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
lapack_int lda_t = MAX(1,n);
lapack_int ldb_t = MAX(1,n);
float* a_t = NULL;
float* b_t = NULL;
/* Check leading dimension(s) */
if( lda < n ) {
info = -7;
LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
return info;
}
if( ldb < n ) {
info = -9;
LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
return info;
}
/* Query optimal working array(s) size if requested */
if( liwork == -1 || lwork == -1 ) {
LAPACK_ssygvd( &itype, &jobz, &uplo, &n, a, &lda_t, b, &ldb_t, w,
work, &lwork, iwork, &liwork, &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;
}
/* Transpose input matrices */
LAPACKE_sge_trans( matrix_order, n, 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_ssygvd( &itype, &jobz, &uplo, &n, a_t, &lda_t, b_t, &ldb_t, w,
work, &lwork, iwork, &liwork, &info );
if( info < 0 ) {
info = info - 1;
}
/* Transpose output matrices */
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, b_t, ldb_t, b, ldb );
/* Release memory and exit */
LAPACKE_free( b_t );
exit_level_1:
LAPACKE_free( a_t );
exit_level_0:
LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
}
} else {
info = -1;
LAPACKE_xerbla( "LAPACKE_ssygvd_work", info );
}
return info;
}

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