/*********************************************************************/
/* 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>
#include "common.h"

int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda, FLOAT *b){
  BLASLONG i, j;

  FLOAT *a_offset, *a_offset1, *a_offset2;
  FLOAT *b_offset;
  FLOAT  ctemp1,  ctemp2,  ctemp3,  ctemp4;
  FLOAT  ctemp5,  ctemp6,  ctemp7,  ctemp8;
  FLOAT  ctemp9, ctemp10, ctemp11, ctemp12;
  FLOAT ctemp13, ctemp14, ctemp15, ctemp16;

  a_offset = a;
  b_offset = b;
  
  lda *= 2;

  i = (n >> 1);

  if (i > 0){
    do{
      a_offset1 = a_offset;
      a_offset2 = a_offset  + lda;
      a_offset += 2 * lda;

      j = (m >> 2);
      if (j > 0){
	do{
	  ctemp1  = *(a_offset1 + 0);
	  ctemp2  = *(a_offset1 + 1);
	  ctemp3  = *(a_offset2 + 0);
	  ctemp4  = *(a_offset2 + 1);
	  
	  ctemp5  = *(a_offset1 + 2);
	  ctemp6  = *(a_offset1 + 3);
	  ctemp7  = *(a_offset2 + 2);
	  ctemp8  = *(a_offset2 + 3);
	  
	  ctemp9  = *(a_offset1 + 4);
	  ctemp10 = *(a_offset1 + 5);
	  ctemp11 = *(a_offset2 + 4);
	  ctemp12 = *(a_offset2 + 5);
	  
	  ctemp13 = *(a_offset1 + 6);
	  ctemp14 = *(a_offset1 + 7);
	  ctemp15 = *(a_offset2 + 6);
	  ctemp16 = *(a_offset2 + 7);
	  
	  *(b_offset + 0) = ctemp1;
	  *(b_offset + 1) = ctemp2;
	  *(b_offset + 2) = ctemp3;
	  *(b_offset + 3) = ctemp4;
	  
	  *(b_offset + 4) = ctemp5;
	  *(b_offset + 5) = ctemp6;
	  *(b_offset + 6) = ctemp7;
	  *(b_offset + 7) = ctemp8;
	  
	  *(b_offset + 8) = ctemp9;
	  *(b_offset + 9) = ctemp10;
	  *(b_offset +10) = ctemp11;
	  *(b_offset +11) = ctemp12;
	  
	  *(b_offset +12) = ctemp13;
	  *(b_offset +13) = ctemp14;
	  *(b_offset +14) = ctemp15;
	  *(b_offset +15) = ctemp16;
	  
	  a_offset1 += 8;
	  a_offset2 += 8;
	  b_offset += 16;
	  j --;
	} while(j>0);
      }

      j = (m & 3);
      if (j > 0){
	do{
	  ctemp1  = *(a_offset1 + 0);
	  ctemp2  = *(a_offset1 + 1);
	  ctemp3  = *(a_offset2 + 0);
	  ctemp4  = *(a_offset2 + 1);
	  
	  *(b_offset + 0) = ctemp1;
	  *(b_offset + 1) = ctemp2;
	  *(b_offset + 2) = ctemp3;
	  *(b_offset + 3) = ctemp4;
	  
	  a_offset1 += 2;
	  a_offset2 += 2;
	  b_offset += 4;
	  j --;
	} while(j>0);
      }
      i --;
    } while(i>0);
  }
  
  if (n & 1){
    j = (m >> 2);
    if (j > 0){
      do{
	ctemp1  = *(a_offset + 0);
	ctemp2  = *(a_offset + 1);
	ctemp5  = *(a_offset + 2);
	ctemp6  = *(a_offset + 3);
	
	ctemp9  = *(a_offset + 4);
	ctemp10 = *(a_offset + 5);
	ctemp13 = *(a_offset + 6);
	ctemp14 = *(a_offset + 7);
	
	*(b_offset + 0) = ctemp1;
	*(b_offset + 1) = ctemp2;
	*(b_offset + 2) = ctemp5;
	*(b_offset + 3) = ctemp6;
	
	*(b_offset + 4) = ctemp9;
	*(b_offset + 5) = ctemp10;
	*(b_offset + 6) = ctemp13;
	*(b_offset + 7) = ctemp14;
	
	a_offset += 8;
	b_offset += 8;
	j --;
      } while(j>0);
    }

    j = (m & 3);
    if (j > 0){
      do{
	ctemp1  = *(a_offset + 0);
	ctemp2  = *(a_offset + 1);
	*(b_offset + 0) = ctemp1;
	*(b_offset + 1) = ctemp2;
	a_offset += 2;
	b_offset += 2;
	j --;
      } while(j > 0);
    }
  }

  return 0;
}