68 lines
3.0 KiB
C
68 lines
3.0 KiB
C
/*****************************************************************************
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Copyright (c) 2010, Intel Corp.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************
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* Contents: Native C interface to LAPACK utility function
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* Author: Intel Corporation
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* Created in February, 2010
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*****************************************************************************/
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#include "lapacke_utils.h"
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/* Converts input general band matrix from row-major(C) to
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* column-major(Fortran) layout or vice versa.
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*/
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void LAPACKE_sgb_trans( int matrix_order, lapack_int m, lapack_int n,
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lapack_int kl, lapack_int ku,
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const float *in, lapack_int ldin,
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float *out, lapack_int ldout )
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{
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lapack_int i, j;
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if( in == NULL || out == NULL ) return;
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if( matrix_order == LAPACK_COL_MAJOR ) {
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for( j = 0; j < MIN( ldout, n ); j++ ) {
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for( i = MAX( ku-j, 0 ); i < MIN3( ldin, m+ku-j, kl+ku+1 );
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i++ ) {
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out[(size_t)i*ldout+j] = in[i+(size_t)j*ldin];
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}
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}
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} else if ( matrix_order == LAPACK_ROW_MAJOR ) {
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/* TODO: interchange loops for performance.
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* This is just reference impemeltation.
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*/
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for( j = 0; j < MIN( n, ldin ); j++ ) {
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for( i = MAX( ku-j, 0 ); i < MIN3( ldout, m+ku-j, kl+ku+1 );
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i++ ) {
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out[i+(size_t)j*ldout] = in[(size_t)i*ldin+j];
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}
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}
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}
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}
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