Centre Blaise Pascal » HPL sur GPU

/*

 * -- High Performance Computing Linpack Benchmark (HPL)

 *    HPL - 2.0 - September 10, 2008

 *    Antoine P. Petitet

 *    University of Tennessee, Knoxville

 *    Innovative Computing Laboratory

 *    (C) Copyright 2000-2008 All Rights Reserved

 *

 * -- Copyright notice and Licensing terms:

 *

 * 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. All  advertising  materials  mentioning  features  or  use of this

 * software must display the following acknowledgement:

 * This  product  includes  software  developed  at  the  University  of

 * Tennessee, Knoxville, Innovative Computing Laboratory.

 *

 * 4. The name of the  University,  the name of the  Laboratory,  or the

 * names  of  its  contributors  may  not  be used to endorse or promote

 * products  derived   from   this  software  without  specific  written

 * permission.

 *

 * -- Disclaimer:

 *

 * 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 UNIVERSITY

 * 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.

 * ---------------------------------------------------------------------

 */

/*

 * Include files

 */

#include "hpl.h"

#ifndef HPL_dswap

#ifdef STDC_HEADERS

void HPL_dswap

(

   const int                        N,

   double *                         X,

   const int                        INCX,

   double *                         Y,

   const int                        INCY

)

#else

void HPL_dswap

( N, X, INCX, Y, INCY )

   const int                        N;

   double *                         X;

   const int                        INCX;

   double *                         Y;

   const int                        INCY;

#endif

{

/*

 * Purpose

 * =======

 *

 * HPL_dswap swaps the vectors x and y.

 *

 *

 * Arguments

 * =========

 *

 * N       (local input)                 const int

 *         On entry, N specifies the length of the vectors  x  and  y. N

 *         must be at least zero.

 *

 * X       (local input/output)          double *

 *         On entry,  X  is an incremented array of dimension  at  least

 *         ( 1 + ( n - 1 ) * abs( INCX ) )  that  contains the vector x.

 *         On exit, the entries of the incremented array  X  are updated

 *         with the entries of the incremented array Y.

 *

 * INCX    (local input)                 const int

 *         On entry, INCX specifies the increment for the elements of X.

 *         INCX must not be zero.

 *

 * Y       (local input/output)          double *

 *         On entry,  Y  is an incremented array of dimension  at  least

 *         ( 1 + ( n - 1 ) * abs( INCY ) )  that  contains the vector y.

 *         On exit, the entries of the incremented array  Y  are updated

 *         with the entries of the incremented array X.

 *

 * INCY    (local input)                 const int

 *         On entry, INCY specifies the increment for the elements of Y.

 *         INCY must not be zero.

 *

 * ---------------------------------------------------------------------

 */

#ifdef HPL_CALL_CBLAS

   cblas_dswap( N, X, INCX, Y, INCY );

#endif

#ifdef HPL_CALL_VSIPL

   register double           x0, x1, x2, x3, y0, y1, y2, y3;

   double                    * StX;

   register int              i;

   int                       nu;

   const int                 incX2 = 2 * INCX, incY2 = 2 * INCY,

                             incX3 = 3 * INCX, incY3 = 3 * INCY,

                             incX4 = 4 * INCX, incY4 = 4 * INCY;

   if( N > 0 )

   {

      if( ( nu = ( N >> 2 ) << 2 ) != 0 )

      {

         StX = X + nu * INCX;

         do

         {

            x0 = (*X);      y0 = (*Y);      x1 = X[INCX ];  y1 = Y[INCY ];

            x2 = X[incX2];  y2 = Y[incY2];  x3 = X[incX3];  y3 = Y[incY3];

            *Y        = x0; *X        = y0; Y[INCY ]  = x1; X[INCX ]  = y1;

            Y[incY2]  = x2; X[incX2]  = y2; Y[incY3]  = x3; X[incX3]  = y3;

            X += incX4; Y += incY4;

         } while( X != StX );

      }

      for( i = N - nu; i != 0; i-- )

      { x0  = (*X); y0  = (*Y); *Y = x0; *X = y0; X += INCX; Y += INCY; }

   }

#endif

#ifdef HPL_CALL_FBLAS

#ifdef HPL_USE_F77_INTEGER_DEF

   const F77_INTEGER         F77N = N, F77incx = INCX, F77incy = INCY;

#else

#define F77N                 N

#define F77incx              INCX

#define F77incy              INCY

#endif

   F77dswap( &F77N, X, &F77incx, Y, &F77incy );

#endif

#ifdef HPL_CALL_CUBLAS

#define CUBLASN                 N

#define CUBLASincx              INCX

#define CUBLASincy              INCY

   CUBLAS_DSWAP( &CUBLASN, X, &CUBLASincx, Y, &CUBLASincy );

#endif

/*

 * End of HPL_dswap

 */

}

#endif