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"

#ifdef STDC_HEADERS

void HPL_max

(

   const int                        N,

   const void *                     IN,

   void *                           INOUT,

   const HPL_T_TYPE                 DTYPE

)

#else

void HPL_max

( N, IN, INOUT, DTYPE )

   const int                        N;

   const void *                     IN;

   void *                           INOUT;

   const HPL_T_TYPE                 DTYPE;

#endif

{

/* 

 * Purpose

 * =======

 *

 * HPL_max combines (max) two buffers.

 * 

 *

 * Arguments

 * =========

 *

 * N       (input)                       const int

 *         On entry, N  specifies  the  length  of  the  buffers  to  be

 *         combined. N must be at least zero.

 *

 * IN      (input)                       const void *

 *         On entry, IN points to the input-only buffer to be combined.

 *

 * INOUT   (input/output)                void *

 *         On entry, INOUT  points  to  the  input-output  buffer  to be

 *         combined.  On exit,  the  entries of this array contains  the

 *         combined results.

 *

 * DTYPE   (input)                       const HPL_T_TYPE

 *         On entry,  DTYPE  specifies the type of the buffers operands.

 *

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

 */ 

/*

 * .. Local Variables ..

 */

   register int               i;

/* ..

 * .. Executable Statements ..

 */

   if( DTYPE == HPL_INT )

   {

      const int       * a = (const int *)(IN);

      int             * b = (int *)(INOUT);

      for( i = 0; i < N; i++ ) b[i] = Mmax( a[i], b[i] );

   }

   else

   {

      const double    * a = (const double *)(IN);

      double          * b = (double *)(INOUT);

      for( i = 0; i < N; i++ ) b[i] = Mmax( a[i], b[i] );

   }

/*

 * End of HPL_max

 */

}