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"

/*

 * Define default value for unrolling factor

 */

#ifndef HPL_LASWP05T_DEPTH

#define    HPL_LASWP05T_DEPTH       32

#define    HPL_LASWP05T_LOG2_DEPTH   5

#endif

#ifdef STDC_HEADERS

void HPL_dlaswp05T

(

   const int                        M,

   const int                        N,

   double *                         A,

   const int                        LDA,

   const double *                   U,

   const int                        LDU,

   const int *                      LINDXA,

   const int *                      LINDXAU

)

#else

void HPL_dlaswp05T

( M, N, A, LDA, U, LDU, LINDXA, LINDXAU )

   const int                        M;

   const int                        N;

   double *                         A;

   const int                        LDA;

   const double *                   U;

   const int                        LDU;

   const int *                      LINDXA;

   const int *                      LINDXAU;

#endif

{

/* 

 * Purpose

 * =======

 *

 * HPL_dlaswp05T copies columns of  U of global offset LINDXAU into rows

 * of A at positions indicated by LINDXA.

 *

 * Arguments

 * =========

 *

 * M       (local input)                 const int

 *         On entry,  M  specifies the number of columns of U that shouldbe copied into A. M must be at least zero.

 *

 * N       (local input)                 const int

 *         On entry, N specifies the length of the columns of U that will

 *         be copied into rows of A. N must be at least zero.

 *

 * A       (local output)                double *

 *         On entry, A points to an array of dimension (LDA,N). On exit,

 *         the  rows of this array specified by  LINDXA  are replaced by

 *         columns of U indicated by LINDXAU.

 *

 * LDA     (local input)                 const int

 *         On entry, LDA specifies the leading dimension of the array A.

 *         LDA must be at least MAX(1,M).

 *

 * U       (local input/output)          const double *

 *         On entry,  U  points  to an array of dimension (LDU,*).  This

 *         array contains the columns that are to be copied into rows of

 *         A.

 *

 * LDU     (local input)                 const int

 *         On entry, LDU specifies the leading dimension of the array U.

 *         LDU must be at least MAX(1,N).

 *

 * LINDXA  (local input)                 const int *

 *         On entry, LINDXA is an array of dimension M that contains the

 *         local row indexes of A that should be copied from U.

 *

 * LINDXAU (local input)                 const int *

 *         On entry, LINDXAU  is an array of dimension  M that  contains

 *         the local column indexes of U that should be copied in A.

 *

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

 */ 

/*

 * .. Local Variables ..

 */

   const double               * U0 = U, * u0;

   double                     * a0;

   const int                  incA = (int)( (unsigned int)(LDA) <<

                                            HPL_LASWP05T_LOG2_DEPTH ),

                              incU = ( 1 << HPL_LASWP05T_LOG2_DEPTH );

   int                        nr, nu;

   register int               i, j;

/* ..

 * .. Executable Statements ..

 */

   if( ( M <= 0 ) || ( N <= 0 ) ) return;

   nr = N - ( nu = (int)( ( (unsigned int)(N) >> HPL_LASWP05T_LOG2_DEPTH ) <<

                            HPL_LASWP05T_LOG2_DEPTH ) );

   for( j = 0; j < nu; j += HPL_LASWP05T_DEPTH, A += incA, U0 += incU )

   {

      for( i = 0; i < M; i++ )

      {

         a0 = A  + (size_t)(LINDXA[ i]);

         u0 = U0 + (size_t)(LINDXAU[i]) * (size_t)(LDU);

         *a0 = u0[ 0]; a0 += LDA;

#if ( HPL_LASWP05T_DEPTH >  1 )

         *a0 = u0[ 1]; a0 += LDA;

#endif

#if ( HPL_LASWP05T_DEPTH >  2 )

         *a0 = u0[ 2]; a0 += LDA; *a0 = u0[ 3]; a0 += LDA;

#endif

#if ( HPL_LASWP05T_DEPTH >  4 )

         *a0 = u0[ 4]; a0 += LDA; *a0 = u0[ 5]; a0 += LDA;

         *a0 = u0[ 6]; a0 += LDA; *a0 = u0[ 7]; a0 += LDA;

#endif

#if ( HPL_LASWP05T_DEPTH >  8 )

         *a0 = u0[ 8]; a0 += LDA; *a0 = u0[ 9]; a0 += LDA;

         *a0 = u0[10]; a0 += LDA; *a0 = u0[11]; a0 += LDA;

         *a0 = u0[12]; a0 += LDA; *a0 = u0[13]; a0 += LDA;

         *a0 = u0[14]; a0 += LDA; *a0 = u0[15]; a0 += LDA;

#endif

#if ( HPL_LASWP05T_DEPTH > 16 )

         *a0 = u0[16]; a0 += LDA; *a0 = u0[17]; a0 += LDA;

         *a0 = u0[18]; a0 += LDA; *a0 = u0[19]; a0 += LDA;

         *a0 = u0[20]; a0 += LDA; *a0 = u0[21]; a0 += LDA;

         *a0 = u0[22]; a0 += LDA; *a0 = u0[23]; a0 += LDA;

         *a0 = u0[24]; a0 += LDA; *a0 = u0[25]; a0 += LDA;

         *a0 = u0[26]; a0 += LDA; *a0 = u0[27]; a0 += LDA;

         *a0 = u0[28]; a0 += LDA; *a0 = u0[29]; a0 += LDA;

         *a0 = u0[30]; a0 += LDA; *a0 = u0[31]; a0 += LDA;

#endif

      }

   }

   if( nr > 0 )

   {

      for( i = 0; i < M; i++ )

      {

         a0 = A  + (size_t)(LINDXA[ i]);

         u0 = U0 + (size_t)(LINDXAU[i]) * (size_t)(LDU);

         for( j = 0; j < nr; j++, a0 += LDA ) { *a0 = u0[j]; }

      }

   }

/*

 * End of HPL_dlaswp05T

 */

}