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

/* 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:                                               */

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

/*      disclaimer.                                                  */

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/*   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,    */

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/*    MERCHANTABILITY  AND FITNESS FOR  A PARTICULAR  PURPOSE ARE    */

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/* 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"

#ifndef USE_ALPHA

#define REAL_PART(a, b)  (a)

#define IMAGE_PART(a, b) (b)

#else

#define REAL_PART(a, b)  (alpha_r * (a) - alpha_i * (b))

#define IMAGE_PART(a, b) (alpha_i * (a) + alpha_r * (b))

#endif

#if defined(REAL_ONLY)

#define CMULT(a, b) (REAL_PART(a, b))

#elif defined(IMAGE_ONLY)

#define CMULT(a, b) (IMAGE_PART(a, b))

#else

#define CMULT(a, b) (REAL_PART(a, b) + IMAGE_PART(a, b))

#endif

int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda,

#ifdef USE_ALPHA

	   FLOAT alpha_r, FLOAT alpha_i, 

#endif

	   FLOAT *b){

  BLASLONG i, j;

  FLOAT *a_offset, *a_offset1, *a_offset2, *a_offset3, *a_offset4;

  FLOAT *b_offset;

  FLOAT a1, a2, a3, a4, a5, a6, a7, a8;

  lda *= 2;

  a_offset = a;

  b_offset = b;

  j = (n >> 2);

  if (j > 0){

    do{

      a_offset1  = a_offset;

      a_offset2  = a_offset1 + lda;

      a_offset3  = a_offset2 + lda;

      a_offset4  = a_offset3 + lda;

      a_offset += 4 * lda;

      for (i = 0; i < m; i ++) {

	a1 = *(a_offset1 + 0);

	a2 = *(a_offset1 + 1);

	a3 = *(a_offset2 + 0);

	a4 = *(a_offset2 + 1);

	a5 = *(a_offset3 + 0);

	a6 = *(a_offset3 + 1);

	a7 = *(a_offset4 + 0);

	a8 = *(a_offset4 + 1);

	*(b_offset +  0) = CMULT(a1, a2);

	*(b_offset +  1) = CMULT(a3, a4);

	*(b_offset +  2) = CMULT(a5, a6);

	*(b_offset +  3) = CMULT(a7, a8);

	a_offset1 += 2;

	a_offset2 += 2;

	a_offset3 += 2;

	a_offset4 += 2;

	b_offset +=  4;

      }

      j--;

    }while(j > 0);

  } /* end of if(j > 0) */

  if (n & 2) {

    a_offset1  = a_offset;

    a_offset2  = a_offset1 + lda;

    a_offset += 2 * lda;

      for (i = 0; i < m; i ++) {

	a1 = *(a_offset1 + 0);

	a2 = *(a_offset1 + 1);

	a3 = *(a_offset2 + 0);

	a4 = *(a_offset2 + 1);

	*(b_offset +  0) = CMULT(a1, a2);

	*(b_offset +  1) = CMULT(a3, a4);

	a_offset1 += 2;

	a_offset2 += 2;

	b_offset +=  2;

      }

  }

  if (n & 1) {

    a_offset1  = a_offset;

    for (i = 0; i < m; i ++) {

      a1 = *(a_offset1 + 0);

      a2 = *(a_offset1 + 1);

      *(b_offset +  0) = CMULT(a1, a2);

      a_offset1 += 2;

      b_offset +=  1;

    }

  }

  return 0;

}