/*
 *             Automatically Tuned Linear Algebra Software v3.10.2
 * Copyright (C) 2010, 2009, 1999 R. Clint Whaley
 *
 * 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.
 *   3. The name of the ATLAS group or the names of its contributers may
 *      not be used to endorse or promote products derived from this
 *      software without specific written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``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 ATLAS GROUP OR ITS 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.
 *
 */
#include "atlas_misc.h"
#include "atlas_lvl2.h"
#include "atlas_prefetch.h"

void ATL_UGERK
   (ATL_CINT M, ATL_CINT N, const TYPE *X, const TYPE *Y, TYPE *A, ATL_CINT lda)
{
   ATL_CINT mr = M - ((M>>1)<<1);
   ATL_CINT incA = ((lda-M+mr)<<1), lda2=lda+lda;
   const TYPE *stY = Y + N+N, *stX = X + ((M>>1)<<2), *x;
   register TYPE ry, iy, rx, ix, ra, ia;

   if ( N > 0)
   {
      if (M > 1)
      {
         do
         {
            #ifdef Conj_
               ry = *Y;
               iy = -Y[1];
            #else
               ry = *Y;
               iy = Y[1];
            #endif
            x = X;
            do
            {
               rx = *x; ix = x[1];
               ra = *A; ia = A[1];
               ra += rx * ry; ATL_pfl1W(A+16);
               ia += rx * iy;
               ra -= ix * iy;
               ia += ix * ry;
               *A = ra;
               A[1] = ia;
               rx = x[2]; ix = x[3]; x += 4;
               ra = A[2]; ia = A[3];
               ra += rx * ry;
               ia += rx * iy;
               ra -= ix * iy;
               ia += ix * ry;
               A[2] = ra;
               A[3] = ia; A += 4;
            }
            while (x != stX);
            if (!mr) goto L1;
            else
            {
               rx = *x; ix = x[1];
               ra = *A; ia = A[1];
               ra += rx * ry;
               ra -= ix * iy;
               ia += rx * iy;
               ia += ix * ry;
               *A = ra;
               A[1] = ia;
            }
L1:         Y += 2;
            A += incA;
         }
         while (Y != stY);
      }
      else if (M == 1)
      {
         #ifdef Conj_
            rx = *X; ix = X[1];
            do
            {
               ry = *Y; iy = Y[1];
               ra = *A; ia = A[1];
               ra += rx * ry;
               ia -= rx * iy;
               ra += ix * iy;
               ia += ix * ry;
               *A = ra;
               A[1] = ia;
               Y += 2;
               A += lda2;
            }
            while (Y != stY);
         #else
            Mjoin(PATL,axpy)(N, X, Y, 1, A, lda);
         #endif
      }
   }
}
