ATL_vdiff.c (ulmBLAS/bench/ATL

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/*

 *             Automatically Tuned Linear Algebra Software v3.10.1

 *                    (C) Copyright 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_tst.h"

void Mjoin(PATL,vdiff)(const int N, const TYPE *X, const int incX,

                       const TYPE *Y, const int incY, TYPE *Z, const int incZ)

/*

 * Z <- X - Y

 */

{

   int i;

   #ifdef TREAL

      for (i=N; i; i--, X += incX, Y += incY, Z += incZ) *Z = *X - *Y;

   #else

      const int incx = incX<<1, incy=incY<<1, incz = incZ<<1;

      for (i=N; i; i--, X += incx, Y += incy, Z += incz)

      {

         *Z = *X - *Y;

         Z[1] = X[1] - Y[1];

      }

   #endif

}