lapacke_ssyevd_work.c
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00001 /*****************************************************************************
00002   Copyright (c) 2010, Intel Corp.
00003   All rights reserved.
00004 
00005   Redistribution and use in source and binary forms, with or without
00006   modification, are permitted provided that the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice,
00009       this list of conditions and the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright
00011       notice, this list of conditions and the following disclaimer in the
00012       documentation and/or other materials provided with the distribution.
00013     * Neither the name of Intel Corporation nor the names of its contributors
00014       may be used to endorse or promote products derived from this software
00015       without specific prior written permission.
00016 
00017   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00018   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
00021   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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00023   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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00025   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
00026   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
00027   THE POSSIBILITY OF SUCH DAMAGE.
00028 ******************************************************************************
00029 * Contents: Native middle-level C interface to LAPACK function ssyevd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_ssyevd_work( int matrix_order, char jobz, char uplo,
00038                                 lapack_int n, float* a, lapack_int lda,
00039                                 float* w, float* work, lapack_int lwork,
00040                                 lapack_int* iwork, lapack_int liwork )
00041 {
00042     lapack_int info = 0;
00043     if( matrix_order == LAPACK_COL_MAJOR ) {
00044         /* Call LAPACK function and adjust info */
00045         LAPACK_ssyevd( &jobz, &uplo, &n, a, &lda, w, work, &lwork, iwork,
00046                        &liwork, &info );
00047         if( info < 0 ) {
00048             info = info - 1;
00049         }
00050     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00051         lapack_int lda_t = MAX(1,n);
00052         float* a_t = NULL;
00053         /* Check leading dimension(s) */
00054         if( lda < n ) {
00055             info = -6;
00056             LAPACKE_xerbla( "LAPACKE_ssyevd_work", info );
00057             return info;
00058         }
00059         /* Query optimal working array(s) size if requested */
00060         if( liwork == -1 || lwork == -1 ) {
00061             LAPACK_ssyevd( &jobz, &uplo, &n, a, &lda_t, w, work, &lwork, iwork,
00062                            &liwork, &info );
00063             return (info < 0) ? (info - 1) : info;
00064         }
00065         /* Allocate memory for temporary array(s) */
00066         a_t = (float*)LAPACKE_malloc( sizeof(float) * lda_t * MAX(1,n) );
00067         if( a_t == NULL ) {
00068             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00069             goto exit_level_0;
00070         }
00071         /* Transpose input matrices */
00072         LAPACKE_sge_trans( matrix_order, n, n, a, lda, a_t, lda_t );
00073         /* Call LAPACK function and adjust info */
00074         LAPACK_ssyevd( &jobz, &uplo, &n, a_t, &lda_t, w, work, &lwork, iwork,
00075                        &liwork, &info );
00076         if( info < 0 ) {
00077             info = info - 1;
00078         }
00079         /* Transpose output matrices */
00080         LAPACKE_sge_trans( LAPACK_COL_MAJOR, n, n, a_t, lda_t, a, lda );
00081         /* Release memory and exit */
00082         LAPACKE_free( a_t );
00083 exit_level_0:
00084         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00085             LAPACKE_xerbla( "LAPACKE_ssyevd_work", info );
00086         }
00087     } else {
00088         info = -1;
00089         LAPACKE_xerbla( "LAPACKE_ssyevd_work", info );
00090     }
00091     return info;
00092 }


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