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

/* 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 <ctype.h></ctype.h>

#include "common.h"

static FLOAT dp1 = 1.;

int CNAME(BLASLONG m, FLOAT *a, BLASLONG lda, FLOAT *b, BLASLONG incb, FLOAT *buffer){

  BLASLONG i, is, min_i;

#if (TRANSA == 2) || (TRANSA == 4)

  FLOAT _Complex temp;

#endif

#ifndef UNIT

  FLOAT atemp1, atemp2, btemp1, btemp2;

#endif

  FLOAT *gemvbuffer = (FLOAT *)buffer;

  FLOAT *B = b;

  if (incb != 1) {

    B = buffer;

    gemvbuffer = (FLOAT *)(((BLASLONG)buffer + m * sizeof(FLOAT) * 2 + 4095) & ~4095);

    COPY_K(m, b, incb, buffer, 1);

  }

  for (is = m; is > 0; is -= DTB_ENTRIES){

    min_i = MIN(is, DTB_ENTRIES);

#if (TRANSA == 1) || (TRANSA == 3)

    if (m - is > 0){

#if   TRANSA == 1

      GEMV_N(m - is, min_i, 0, dp1, ZERO,

	      a + (is + (is - min_i) * lda) * 2, lda,

	      B + (is - min_i) * 2, 1,

	      B + is * 2, 1, gemvbuffer);

#else

      GEMV_R(m - is, min_i, 0, dp1, ZERO,

	      a + (is + (is - min_i) * lda) * 2, lda,

	      B + (is - min_i) * 2, 1,

	      B + is * 2, 1, gemvbuffer);

#endif

    }

#endif

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

      FLOAT *AA = a + ((is - i - 1) + (is - i - 1) * lda) * 2;

      FLOAT *BB = B + (is - i - 1) * 2;

#if (TRANSA == 1) || (TRANSA == 3)

#if TRANSA == 1

      if (i > 0) AXPYU_K (i, 0, 0, BB[0], BB[1], AA + 2, 1, BB + 2, 1, NULL, 0);

#else

      if (i > 0) AXPYC_K(i, 0, 0, BB[0], BB[1], AA + 2, 1, BB + 2, 1, NULL, 0);

#endif

#endif

#ifndef UNIT

      atemp1 = AA[0];

      atemp2 = AA[1];

      btemp1 = BB[0];

      btemp2 = BB[1];

#if (TRANSA == 1) || (TRANSA == 2)

      BB[0] = atemp1 * btemp1 - atemp2 * btemp2;

      BB[1] = atemp1 * btemp2 + atemp2 * btemp1;

#else

      BB[0] = atemp1 * btemp1 + atemp2 * btemp2;

      BB[1] = atemp1 * btemp2 - atemp2 * btemp1;

#endif

#endif

#if (TRANSA == 2) || (TRANSA == 4)

      if (i < min_i - 1) {

#if   TRANSA == 2

	temp = DOTU_K(min_i - i - 1, AA - (min_i - i - 1) * 2, 1, BB - (min_i - i - 1) * 2, 1);

#else

	temp = DOTC_K(min_i - i - 1, AA - (min_i - i - 1) * 2, 1, BB - (min_i - i - 1) * 2, 1);

#endif

      BB[0] += CREAL(temp);

      BB[1] += CIMAG(temp);

      }

#endif

    }

#if (TRANSA == 2) || (TRANSA == 4)

    if (is - min_i > 0){

#if TRANSA == 2

      GEMV_T(is - min_i, min_i, 0, dp1, ZERO,

	      a + (is - min_i) * lda * 2, lda,

	      B,              1,

	      B + (is - min_i) * 2, 1, gemvbuffer);

#else

      GEMV_C(is - min_i, min_i, 0, dp1, ZERO,

	      a + (is - min_i) * lda * 2, lda,

	      B,              1,

	      B + (is - min_i) * 2, 1, gemvbuffer);

#endif

    }

#endif

  }

  if (incb != 1) {

    COPY_K(m, buffer, 1, b, incb);

  }

  return 0;

}