ATL_gecopy.c (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"

void Mjoin(PATL,gecopy)

   (const int M0, const int N, const TYPE *A, const int lda,

    TYPE *C, const int ldc)

/*

 * C <- A;  copy backwards, so 1st cols of C are retained in cache for reuse

 */

{

   int i, j;

   #ifdef TREAL

      #define M M0

      const int incA = lda+lda, incC = ldc+ldc;

   #else

      const int M = M0<<1, incA = lda<<2, incC = ldc<<2;

   #endif

   const int n = N>>1;

   const TYPE *A0, *A1;

   TYPE *C0, *C1;

   A0 = A + (lda SHIFT)*(N-2);

   A1 = A0 + (lda SHIFT);

   C0 = C + (ldc SHIFT)*(N-2);

   C1 = C0 + (ldc SHIFT);

   for (j=n; j; j--, A0 -= incA, A1 -= incA, C0 -= incC, C1 -= incC)

   {

      for (i=M-1; i >= 0; i--)

      {

         C0[i] = A0[i];

         C1[i] = A1[i];

      }

   }

   if (N-n-n)

      for (i=M-1; i >= 0; i--)

         C[i] = A[i];

}