/*********************************************************************/

/* Copyright 2009, 2010 The University of Texas at Austin.           */

/* All rights reserved.                                              */

/*                                                                   */

/* Redistribution and use in source and binary forms, with or        */

/* without modification, are permitted provided that the following   */

/* conditions are met:                                               */

/*                                                                   */

/*   1. Redistributions of source code must retain the above         */

/*      copyright notice, this list of conditions and the following  */

/*      disclaimer.                                                  */

/*                                                                   */

/*   2. 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.                              */

/*                                                                   */

/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */

/*    AUSTIN  ``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 UNIVERSITY  OF TEXAS AT    */

/*    AUSTIN 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.                                    */

/*                                                                   */

/* The views and conclusions contained in the software and           */

/* documentation are those of the authors and should not be          */

/* interpreted as representing official policies, either expressed   */

/* or implied, of The University of Texas at Austin.                 */

/*********************************************************************/

#include <stdio.h></stdio.h>

#include "common.h"

int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda, BLASLONG posX, BLASLONG posY, FLOAT *b){

  BLASLONG i, js, offset;

  FLOAT data01, data02, data03, data04, data05, data06, data07, data08;

  FLOAT data09, data10, data11, data12, data13, data14, data15, data16;

  FLOAT *ao1, *ao2,  *ao3,  *ao4,  *ao5,  *ao6,  *ao7,  *ao8;

  lda *= 2;

  js = (n >> 3);

  while (js > 0){

    offset = posX - posY;

    if (offset >  0) ao1 = a + posY * 2 + (posX + 0) * lda; else ao1 = a + (posX + 0) * 2 + posY * lda;

    if (offset > -1) ao2 = a + posY * 2 + (posX + 1) * lda; else ao2 = a + (posX + 1) * 2 + posY * lda;

    if (offset > -2) ao3 = a + posY * 2 + (posX + 2) * lda; else ao3 = a + (posX + 2) * 2 + posY * lda;

    if (offset > -3) ao4 = a + posY * 2 + (posX + 3) * lda; else ao4 = a + (posX + 3) * 2 + posY * lda;

    if (offset > -4) ao5 = a + posY * 2 + (posX + 4) * lda; else ao5 = a + (posX + 4) * 2 + posY * lda;

    if (offset > -5) ao6 = a + posY * 2 + (posX + 5) * lda; else ao6 = a + (posX + 5) * 2 + posY * lda;

    if (offset > -6) ao7 = a + posY * 2 + (posX + 6) * lda; else ao7 = a + (posX + 6) * 2 + posY * lda;

    if (offset > -7) ao8 = a + posY * 2 + (posX + 7) * lda; else ao8 = a + (posX + 7) * 2 + posY * lda;

    i     = m;

    while (i > 0) {

      data01 = *(ao1 + 0);

      data02 = *(ao1 + 1);

      data03 = *(ao2 + 0);

      data04 = *(ao2 + 1);

      data05 = *(ao3 + 0);

      data06 = *(ao3 + 1);

      data07 = *(ao4 + 0);

      data08 = *(ao4 + 1);

      data09 = *(ao5 + 0);

      data10 = *(ao5 + 1);

      data11 = *(ao6 + 0);

      data12 = *(ao6 + 1);

      data13 = *(ao7 + 0);

      data14 = *(ao7 + 1);

      data15 = *(ao8 + 0);

      data16 = *(ao8 + 1);

      if (offset >   0) ao1 += 2; else ao1 += lda;

      if (offset >  -1) ao2 += 2; else ao2 += lda;

      if (offset >  -2) ao3 += 2; else ao3 += lda;

      if (offset >  -3) ao4 += 2; else ao4 += lda;

      if (offset >  -4) ao5 += 2; else ao5 += lda;

      if (offset >  -5) ao6 += 2; else ao6 += lda;

      if (offset >  -6) ao7 += 2; else ao7 += lda;

      if (offset >  -7) ao8 += 2; else ao8 += lda;

      b[ 0] = data01;

      b[ 1] = data02;

      b[ 2] = data03;

      b[ 3] = data04;

      b[ 4] = data05;

      b[ 5] = data06;

      b[ 6] = data07;

      b[ 7] = data08;

      b[ 8] = data09;

      b[ 9] = data10;

      b[10] = data11;

      b[11] = data12;

      b[12] = data13;

      b[13] = data14;

      b[14] = data15;

      b[15] = data16;

      b += 16;

      offset --;

      i --;

    }

    posX += 8;

    js --;

  }

  if (n & 4) {

    offset = posX - posY;

    if (offset >  0) ao1 = a + posY * 2 + (posX + 0) * lda; else ao1 = a + (posX + 0) * 2 + posY * lda;

    if (offset > -1) ao2 = a + posY * 2 + (posX + 1) * lda; else ao2 = a + (posX + 1) * 2 + posY * lda;

    if (offset > -2) ao3 = a + posY * 2 + (posX + 2) * lda; else ao3 = a + (posX + 2) * 2 + posY * lda;

    if (offset > -3) ao4 = a + posY * 2 + (posX + 3) * lda; else ao4 = a + (posX + 3) * 2 + posY * lda;

    i     = m;

    while (i > 0) {

      data01 = *(ao1 + 0);

      data02 = *(ao1 + 1);

      data03 = *(ao2 + 0);

      data04 = *(ao2 + 1);

      data05 = *(ao3 + 0);

      data06 = *(ao3 + 1);

      data07 = *(ao4 + 0);

      data08 = *(ao4 + 1);

      if (offset >   0) ao1 += 2; else ao1 += lda;

      if (offset >  -1) ao2 += 2; else ao2 += lda;

      if (offset >  -2) ao3 += 2; else ao3 += lda;

      if (offset >  -3) ao4 += 2; else ao4 += lda;

      b[ 0] = data01;

      b[ 1] = data02;

      b[ 2] = data03;

      b[ 3] = data04;

      b[ 4] = data05;

      b[ 5] = data06;

      b[ 6] = data07;

      b[ 7] = data08;

      b += 8;

      offset --;

      i --;

    }

    posX += 4;

  }

  if (n & 2) {

    offset = posX - posY;

    if (offset >  0) ao1 = a + posY * 2 + (posX + 0) * lda; else ao1 = a + (posX + 0) * 2 + posY * lda;

    if (offset > -1) ao2 = a + posY * 2 + (posX + 1) * lda; else ao2 = a + (posX + 1) * 2 + posY * lda;

    i     = m;

    while (i > 0) {

      data01 = *(ao1 + 0);

      data02 = *(ao1 + 1);

      data03 = *(ao2 + 0);

      data04 = *(ao2 + 1);

      if (offset >   0) ao1 += 2; else ao1 += lda;

      if (offset >  -1) ao2 += 2; else ao2 += lda;

      b[ 0] = data01;

      b[ 1] = data02;

      b[ 2] = data03;

      b[ 3] = data04;

      b += 4;

      offset --;

      i --;

    }

    posX += 2;

  }

  if (n & 1) {

    offset = posX - posY;

    if (offset >  0) ao1 = a + posY * 2 + (posX + 0) * lda; else ao1 = a + (posX + 0) * 2 + posY * lda;

    i     = m;

    while (i > 0) {

      data01 = *(ao1 + 0);

      data02 = *(ao1 + 1);

      if (offset >   0) ao1 += 2; else ao1 += lda;

      b[ 0] = data01;

      b[ 1] = data02;

      b += 2;

      offset --;

      i --;

    }

  }

  return 0;

}