lapacke_dsbgvd_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
00022   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 dsbgvd
00030 * Author: Intel Corporation
00031 * Generated October, 2010
00032 *****************************************************************************/
00033 
00034 #include "lapacke.h"
00035 #include "lapacke_utils.h"
00036 
00037 lapack_int LAPACKE_dsbgvd_work( int matrix_order, char jobz, char uplo,
00038                                 lapack_int n, lapack_int ka, lapack_int kb,
00039                                 double* ab, lapack_int ldab, double* bb,
00040                                 lapack_int ldbb, double* w, double* z,
00041                                 lapack_int ldz, double* work, lapack_int lwork,
00042                                 lapack_int* iwork, lapack_int liwork )
00043 {
00044     lapack_int info = 0;
00045     if( matrix_order == LAPACK_COL_MAJOR ) {
00046         /* Call LAPACK function and adjust info */
00047         LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab, &ldab, bb, &ldbb, w, z,
00048                        &ldz, work, &lwork, iwork, &liwork, &info );
00049         if( info < 0 ) {
00050             info = info - 1;
00051         }
00052     } else if( matrix_order == LAPACK_ROW_MAJOR ) {
00053         lapack_int ldab_t = MAX(1,ka+1);
00054         lapack_int ldbb_t = MAX(1,kb+1);
00055         lapack_int ldz_t = MAX(1,n);
00056         double* ab_t = NULL;
00057         double* bb_t = NULL;
00058         double* z_t = NULL;
00059         /* Check leading dimension(s) */
00060         if( ldab < n ) {
00061             info = -8;
00062             LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
00063             return info;
00064         }
00065         if( ldbb < n ) {
00066             info = -10;
00067             LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
00068             return info;
00069         }
00070         if( ldz < n ) {
00071             info = -13;
00072             LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
00073             return info;
00074         }
00075         /* Query optimal working array(s) size if requested */
00076         if( liwork == -1 || lwork == -1 ) {
00077             LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab, &ldab_t, bb, &ldbb_t,
00078                            w, z, &ldz_t, work, &lwork, iwork, &liwork, &info );
00079             return (info < 0) ? (info - 1) : info;
00080         }
00081         /* Allocate memory for temporary array(s) */
00082         ab_t = (double*)LAPACKE_malloc( sizeof(double) * ldab_t * MAX(1,n) );
00083         if( ab_t == NULL ) {
00084             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00085             goto exit_level_0;
00086         }
00087         bb_t = (double*)LAPACKE_malloc( sizeof(double) * ldbb_t * MAX(1,n) );
00088         if( bb_t == NULL ) {
00089             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00090             goto exit_level_1;
00091         }
00092         if( LAPACKE_lsame( jobz, 'v' ) ) {
00093             z_t = (double*)LAPACKE_malloc( sizeof(double) * ldz_t * MAX(1,n) );
00094             if( z_t == NULL ) {
00095                 info = LAPACK_TRANSPOSE_MEMORY_ERROR;
00096                 goto exit_level_2;
00097             }
00098         }
00099         /* Transpose input matrices */
00100         LAPACKE_dsb_trans( matrix_order, uplo, n, ka, ab, ldab, ab_t, ldab_t );
00101         LAPACKE_dsb_trans( matrix_order, uplo, n, kb, bb, ldbb, bb_t, ldbb_t );
00102         /* Call LAPACK function and adjust info */
00103         LAPACK_dsbgvd( &jobz, &uplo, &n, &ka, &kb, ab_t, &ldab_t, bb_t, &ldbb_t,
00104                        w, z_t, &ldz_t, work, &lwork, iwork, &liwork, &info );
00105         if( info < 0 ) {
00106             info = info - 1;
00107         }
00108         /* Transpose output matrices */
00109         LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, ka, ab_t, ldab_t, ab,
00110                            ldab );
00111         LAPACKE_dsb_trans( LAPACK_COL_MAJOR, uplo, n, kb, bb_t, ldbb_t, bb,
00112                            ldbb );
00113         if( LAPACKE_lsame( jobz, 'v' ) ) {
00114             LAPACKE_dge_trans( LAPACK_COL_MAJOR, n, n, z_t, ldz_t, z, ldz );
00115         }
00116         /* Release memory and exit */
00117         if( LAPACKE_lsame( jobz, 'v' ) ) {
00118             LAPACKE_free( z_t );
00119         }
00120 exit_level_2:
00121         LAPACKE_free( bb_t );
00122 exit_level_1:
00123         LAPACKE_free( ab_t );
00124 exit_level_0:
00125         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
00126             LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
00127         }
00128     } else {
00129         info = -1;
00130         LAPACKE_xerbla( "LAPACKE_dsbgvd_work", info );
00131     }
00132     return info;
00133 }


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