159 lines
7.1 KiB
C
159 lines
7.1 KiB
C
/*****************************************************************************
|
|
Copyright (c) 2011, Intel Corp.
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
* Redistributions of source code must retain the above copyright notice,
|
|
this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
* Neither the name of Intel Corporation nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
|
THE POSSIBILITY OF SUCH DAMAGE.
|
|
*****************************************************************************
|
|
* Contents: Native middle-level C interface to LAPACK function zgesdd
|
|
* Author: Intel Corporation
|
|
* Generated November, 2011
|
|
*****************************************************************************/
|
|
|
|
#include "lapacke_utils.h"
|
|
|
|
lapack_int LAPACKE_zgesdd_work( int matrix_order, char jobz, lapack_int m,
|
|
lapack_int n, lapack_complex_double* a,
|
|
lapack_int lda, double* s,
|
|
lapack_complex_double* u, lapack_int ldu,
|
|
lapack_complex_double* vt, lapack_int ldvt,
|
|
lapack_complex_double* work, lapack_int lwork,
|
|
double* rwork, lapack_int* iwork )
|
|
{
|
|
lapack_int info = 0;
|
|
if( matrix_order == LAPACK_COL_MAJOR ) {
|
|
/* Call LAPACK function and adjust info */
|
|
LAPACK_zgesdd( &jobz, &m, &n, a, &lda, s, u, &ldu, vt, &ldvt, work,
|
|
&lwork, rwork, iwork, &info );
|
|
if( info < 0 ) {
|
|
info = info - 1;
|
|
}
|
|
} else if( matrix_order == LAPACK_ROW_MAJOR ) {
|
|
lapack_int nrows_u = ( LAPACKE_lsame( jobz, 'a' ) ||
|
|
LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && m<n) ) ? m : 1;
|
|
lapack_int ncols_u = ( LAPACKE_lsame( jobz, 'a' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && m<n) ) ? m :
|
|
( LAPACKE_lsame( jobz, 's' ) ? MIN(m,n) : 1);
|
|
lapack_int nrows_vt = ( LAPACKE_lsame( jobz, 'a' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && m<n) ) ? n :
|
|
( LAPACKE_lsame( jobz, 's' ) ? MIN(m,n) : 1);
|
|
lapack_int lda_t = MAX(1,m);
|
|
lapack_int ldu_t = MAX(1,nrows_u);
|
|
lapack_int ldvt_t = MAX(1,nrows_vt);
|
|
lapack_complex_double* a_t = NULL;
|
|
lapack_complex_double* u_t = NULL;
|
|
lapack_complex_double* vt_t = NULL;
|
|
/* Check leading dimension(s) */
|
|
if( lda < n ) {
|
|
info = -6;
|
|
LAPACKE_xerbla( "LAPACKE_zgesdd_work", info );
|
|
return info;
|
|
}
|
|
if( ldu < ncols_u ) {
|
|
info = -9;
|
|
LAPACKE_xerbla( "LAPACKE_zgesdd_work", info );
|
|
return info;
|
|
}
|
|
if( ldvt < n ) {
|
|
info = -11;
|
|
LAPACKE_xerbla( "LAPACKE_zgesdd_work", info );
|
|
return info;
|
|
}
|
|
/* Query optimal working array(s) size if requested */
|
|
if( lwork == -1 ) {
|
|
LAPACK_zgesdd( &jobz, &m, &n, a, &lda_t, s, u, &ldu_t, vt, &ldvt_t,
|
|
work, &lwork, rwork, iwork, &info );
|
|
return (info < 0) ? (info - 1) : info;
|
|
}
|
|
/* Allocate memory for temporary array(s) */
|
|
a_t = (lapack_complex_double*)
|
|
LAPACKE_malloc( sizeof(lapack_complex_double) * lda_t * MAX(1,n) );
|
|
if( a_t == NULL ) {
|
|
info = LAPACK_TRANSPOSE_MEMORY_ERROR;
|
|
goto exit_level_0;
|
|
}
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m<n) ) ) {
|
|
u_t = (lapack_complex_double*)
|
|
LAPACKE_malloc( sizeof(lapack_complex_double) *
|
|
ldu_t * MAX(1,ncols_u) );
|
|
if( u_t == NULL ) {
|
|
info = LAPACK_TRANSPOSE_MEMORY_ERROR;
|
|
goto exit_level_1;
|
|
}
|
|
}
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m>=n) ) ) {
|
|
vt_t = (lapack_complex_double*)
|
|
LAPACKE_malloc( sizeof(lapack_complex_double) *
|
|
ldvt_t * MAX(1,n) );
|
|
if( vt_t == NULL ) {
|
|
info = LAPACK_TRANSPOSE_MEMORY_ERROR;
|
|
goto exit_level_2;
|
|
}
|
|
}
|
|
/* Transpose input matrices */
|
|
LAPACKE_zge_trans( matrix_order, m, n, a, lda, a_t, lda_t );
|
|
/* Call LAPACK function and adjust info */
|
|
LAPACK_zgesdd( &jobz, &m, &n, a_t, &lda_t, s, u_t, &ldu_t, vt_t,
|
|
&ldvt_t, work, &lwork, rwork, iwork, &info );
|
|
if( info < 0 ) {
|
|
info = info - 1;
|
|
}
|
|
/* Transpose output matrices */
|
|
LAPACKE_zge_trans( LAPACK_COL_MAJOR, m, n, a_t, lda_t, a, lda );
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m<n) ) ) {
|
|
LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_u, ncols_u, u_t, ldu_t,
|
|
u, ldu );
|
|
}
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m>=n) ) ) {
|
|
LAPACKE_zge_trans( LAPACK_COL_MAJOR, nrows_vt, n, vt_t, ldvt_t, vt,
|
|
ldvt );
|
|
}
|
|
/* Release memory and exit */
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m>=n) ) ) {
|
|
LAPACKE_free( vt_t );
|
|
}
|
|
exit_level_2:
|
|
if( LAPACKE_lsame( jobz, 'a' ) || LAPACKE_lsame( jobz, 's' ) ||
|
|
( LAPACKE_lsame( jobz, 'o' ) && (m<n) ) ) {
|
|
LAPACKE_free( u_t );
|
|
}
|
|
exit_level_1:
|
|
LAPACKE_free( a_t );
|
|
exit_level_0:
|
|
if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
|
|
LAPACKE_xerbla( "LAPACKE_zgesdd_work", info );
|
|
}
|
|
} else {
|
|
info = -1;
|
|
LAPACKE_xerbla( "LAPACKE_zgesdd_work", info );
|
|
}
|
|
return info;
|
|
}
|