LAPACKE/src/lapacke_zgbrfs_work.c

   1 /*****************************************************************************
   2   Copyright (c) 2014, Intel Corp.
   3   All rights reserved.
   4
   5   Redistribution and use in source and binary forms, with or without
   6   modification, are permitted provided that the following conditions are met:
   7
   8     * Redistributions of source code must retain the above copyright notice,
   9       this list of conditions and the following disclaimer.
  10     * Redistributions in binary form must reproduce the above copyright
  11       notice, this list of conditions and the following disclaimer in the
  12       documentation and/or other materials provided with the distribution.
  13     * Neither the name of Intel Corporation nor the names of its contributors
  14       may be used to endorse or promote products derived from this software
  15       without specific prior written permission.
  16
  17   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  18   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  21   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  27   THE POSSIBILITY OF SUCH DAMAGE.
  28 *****************************************************************************
  29 * Contents: Native middle-level C interface to LAPACK function zgbrfs
  30 * Author: Intel Corporation
  31 * Generated November 2015
  32 *****************************************************************************/
  33
  34 #include "lapacke_utils.h"
  35
  36 lapack_int LAPACKE_zgbrfs_work( int matrix_layout, char trans, lapack_int n,
  37                                 lapack_int kl, lapack_int ku, lapack_int nrhs,
  38                                 const lapack_complex_double* ab,
  39                                 lapack_int ldab,
  40                                 const lapack_complex_double* afb,
  41                                 lapack_int ldafb, const lapack_int* ipiv,
  42                                 const lapack_complex_double* b, lapack_int ldb,
  43                                 lapack_complex_double* x, lapack_int ldx,
  44                                 double* ferr, double* berr,
  45                                 lapack_complex_double* work, double* rwork )
  46 {
  47     lapack_int info = 0;
  48     if( matrix_layout == LAPACK_COL_MAJOR ) {
  49         /* Call LAPACK function and adjust info */
  50         LAPACK_zgbrfs( &trans, &n, &kl, &ku, &nrhs, ab, &ldab, afb, &ldafb,
  51                        ipiv, b, &ldb, x, &ldx, ferr, berr, work, rwork, &info );
  52         if( info < 0 ) {
  53             info = info - 1;
  54         }
  55     } else if( matrix_layout == LAPACK_ROW_MAJOR ) {
  56         lapack_int ldab_t = MAX(1,kl+ku+1);
  57         lapack_int ldafb_t = MAX(1,2*kl+ku+1);
  58         lapack_int ldb_t = MAX(1,n);
  59         lapack_int ldx_t = MAX(1,n);
  60         lapack_complex_double* ab_t = NULL;
  61         lapack_complex_double* afb_t = NULL;
  62         lapack_complex_double* b_t = NULL;
  63         lapack_complex_double* x_t = NULL;
  64         /* Check leading dimension(s) */
  65         if( ldab < n ) {
  66             info = -8;
  67             LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
  68             return info;
  69         }
  70         if( ldafb < n ) {
  71             info = -10;
  72             LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
  73             return info;
  74         }
  75         if( ldb < nrhs ) {
  76             info = -13;
  77             LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
  78             return info;
  79         }
  80         if( ldx < nrhs ) {
  81             info = -15;
  82             LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
  83             return info;
  84         }
  85         /* Allocate memory for temporary array(s) */
  86         ab_t = (lapack_complex_double*)
  87             LAPACKE_malloc( sizeof(lapack_complex_double) * ldab_t * MAX(1,n) );
  88         if( ab_t == NULL ) {
  89             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
  90             goto exit_level_0;
  91         }
  92         afb_t = (lapack_complex_double*)
  93             LAPACKE_malloc( sizeof(lapack_complex_double) *
  94                             ldafb_t * MAX(1,n) );
  95         if( afb_t == NULL ) {
  96             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
  97             goto exit_level_1;
  98         }
  99         b_t = (lapack_complex_double*)
 100             LAPACKE_malloc( sizeof(lapack_complex_double) *
 101                             ldb_t * MAX(1,nrhs) );
 102         if( b_t == NULL ) {
 103             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
 104             goto exit_level_2;
 105         }
 106         x_t = (lapack_complex_double*)
 107             LAPACKE_malloc( sizeof(lapack_complex_double) *
 108                             ldx_t * MAX(1,nrhs) );
 109         if( x_t == NULL ) {
 110             info = LAPACK_TRANSPOSE_MEMORY_ERROR;
 111             goto exit_level_3;
 112         }
 113         /* Transpose input matrices */
 114         LAPACKE_zgb_trans( matrix_layout, n, n, kl, ku, ab, ldab, ab_t, ldab_t );
 115         LAPACKE_zgb_trans( matrix_layout, n, n, kl, kl+ku, afb, ldafb, afb_t,
 116                            ldafb_t );
 117         LAPACKE_zge_trans( matrix_layout, n, nrhs, b, ldb, b_t, ldb_t );
 118         LAPACKE_zge_trans( matrix_layout, n, nrhs, x, ldx, x_t, ldx_t );
 119         /* Call LAPACK function and adjust info */
 120         LAPACK_zgbrfs( &trans, &n, &kl, &ku, &nrhs, ab_t, &ldab_t, afb_t,
 121                        &ldafb_t, ipiv, b_t, &ldb_t, x_t, &ldx_t, ferr, berr,
 122                        work, rwork, &info );
 123         if( info < 0 ) {
 124             info = info - 1;
 125         }
 126         /* Transpose output matrices */
 127         LAPACKE_zge_trans( LAPACK_COL_MAJOR, n, nrhs, x_t, ldx_t, x, ldx );
 128         /* Release memory and exit */
 129         LAPACKE_free( x_t );
 130 exit_level_3:
 131         LAPACKE_free( b_t );
 132 exit_level_2:
 133         LAPACKE_free( afb_t );
 134 exit_level_1:
 135         LAPACKE_free( ab_t );
 136 exit_level_0:
 137         if( info == LAPACK_TRANSPOSE_MEMORY_ERROR ) {
 138             LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
 139         }
 140     } else {
 141         info = -1;
 142         LAPACKE_xerbla( "LAPACKE_zgbrfs_work", info );
 143     }
 144     return info;
 145 }