atl_ptsyr2k.c

来自「基于Blas CLapck的.用过的人知道是干啥的」· C语言 代码 · 共 464 行 · 第 1/2 页

      vc = malloc( ATL_Cachelen + lgth );

   if( vc == NULL ) return( 1 );
#ifdef TREAL
   alpha    = *((TYPE *)(ALPHA)); beta = *((TYPE *)(BETA) );
   zero     = ATL_rzero;          zptr = (void *)(&zero);
#else
   alpha[0] = ((TYPE *)(ALPHA))[0]; alpha[1] = ((TYPE *)(ALPHA))[1];
   beta [0] = ((TYPE *)(BETA ))[0]; beta [1] = ((TYPE *)(BETA ))[1];
   zero [0] = ATL_rzero;            zero [1] = ATL_rzero;
   zptr     = (void *)(zero);
#endif
   c = ATL_AlignPtr( vc );
   if( TRANS == AtlasNoTrans )
   {
      root = Mjoin( PATL, ptgemm_nt )( NTHREADS, ATTR, AtlasNoTrans, TGEMM,
                                       N, N, K, ALPHA, A, LDA, B, LDB, zptr,
                                       (void *)(c), N );
   }
   else
   {
      root = Mjoin( PATL, ptgemm_nt )( NTHREADS, ATTR, TGEMM, AtlasNoTrans,
                                       N, N, K, ALPHA, A, LDA, B, LDB, zptr,
                                       (void *)(c), N );
   }
   ATL_join_tree( root );
   ATL_free_tree( root );

   if( UPLO == AtlasUpper )
   {
      if(      SCALAR_IS_ONE(  beta ) )
      { Mjoin( PATL, syr2k_putU_b1   )( N, c, beta, (TYPE *)(C), LDC ); }
      else if( SCALAR_IS_ZERO( beta ) )
      { Mjoin( PATL, syr2k_putU_b0   )( N, c, beta, (TYPE *)(C), LDC ); }
#ifdef TCPLX
      else if( SCALAR_IS_NONE( beta ) )
      { Mjoin( PATL, syr2k_putU_bn1  )( N, c, beta, (TYPE *)(C), LDC ); }
      else if( beta[1] == ATL_rzero   )
      { Mjoin( PATL, syr2k_putU_bXi0 )( N, c, beta, (TYPE *)(C), LDC ); }
#endif
      else
      { Mjoin( PATL, syr2k_putU_bX   )( N, c, beta, (TYPE *)(C), LDC ); }
   }
   else
   {
      if(      SCALAR_IS_ONE(  beta ) )
      { Mjoin( PATL, syr2k_putL_b1   )( N, c, beta, (TYPE *)(C), LDC ); }
      else if( SCALAR_IS_ZERO( beta ) )
      { Mjoin( PATL, syr2k_putL_b0   )( N, c, beta, (TYPE *)(C), LDC ); }
#ifdef TCPLX
      else if( SCALAR_IS_NONE( beta ) )
      { Mjoin( PATL, syr2k_putL_bn1  )( N, c, beta, (TYPE *)(C), LDC ); }
      else if( beta[1] == ATL_rzero   )
      { Mjoin( PATL, syr2k_putL_bXi0 )( N, c, beta, (TYPE *)(C), LDC ); }
#endif
      else
      { Mjoin( PATL, syr2k_putL_bX   )( N, c, beta, (TYPE *)(C), LDC ); }
   }

   free( vc );

   return( 0 );
/*
 * End of Mjoin( PATL, ptsyr2k0_nt )
 */
}

void Mjoin( PATL, ptsyr2k )
(
   const enum ATLAS_UPLO      UPLO,
   const enum ATLAS_TRANS     TRANS,
   const int                  N,
   const int                  K,
   const SCALAR               ALPHA,
   const TYPE                 * A,
   const int                  LDA,
   const TYPE                 * B,
   const int                  LDB,
   const SCALAR               BETA,
   TYPE                       * C,
   const int                  LDC
)
{
/*
 * Purpose
 * =======
 *
 * Mjoin( PATL, ptsyr2k ) performs one of the symmetric rank 2k operations
 *
 *    C := alpha * A * B' + alpha * B * A' + beta * C,
 *
 * or
 *
 *    C := alpha * A' * B + alpha * B' * A + beta * C,
 *
 * where alpha and beta are scalars, C is an n by n symmetric matrix and
 * A and B are n by k matrices in the first case and k by n  matrices in
 * the second case.
 *
 * For a  more  detailed description of  the arguments of this function,
 * see the reference implementation in the  ATLAS/src/blas/reference di-
 * rectory.
 *
 * ---------------------------------------------------------------------
 */
/*
 * .. Local Variables ..
 */
   PT_TREE_T                  root = NULL;
   pthread_attr_t             attr;
#ifdef TREAL
   TYPE                       alpha0 = ALPHA, beta0 = BETA;
#endif
/* ..
 * .. Executable Statements ..
 *
 */
   if( ( N == 0 ) || ( ( SCALAR_IS_ZERO( ALPHA ) || ( K == 0 ) ) &&
                       SCALAR_IS_ONE( BETA ) ) ) return;

   if( ( SCALAR_IS_ZERO( ALPHA ) ) || ( K == 0 ) )
   { Mjoin( PATL, pttrscal )( UPLO, N, N, BETA, C, LDC ); return; }

   ATL_thread_init( &attr );
#ifdef TREAL
   root = Mjoin( PATL, ptsyr2k_nt )( ATL_NTHREADS, &attr, UPLO, TRANS, N,
                                     K, (void *)(&alpha0), (void *)(&alpha0),
                                     (void *)(A), LDA, (void *)(B), LDB,
                                     (void *)(&beta0), (void *)(C), LDC );
#else
   root = Mjoin( PATL, ptsyr2k_nt )( ATL_NTHREADS, &attr, UPLO, TRANS, N,
                                     K, (TYPE *)(ALPHA), (TYPE *)(ALPHA),
                                     (void *)(A), LDA, (void *)(B), LDB,
                                     (TYPE *)(BETA), (void *)(C), LDC );
#endif
   ATL_join_tree  ( root );
   ATL_free_tree  ( root );
   ATL_thread_exit( &attr );
/*
 * End of Mjoin( PATL, ptsyr2k )
 */
}

PT_TREE_T Mjoin( PATL, ptsyr2k_nt )
(
   const unsigned int         NTHREADS,
   pthread_attr_t             * ATTR,
   const enum ATLAS_UPLO      UPLO,
   const enum ATLAS_TRANS     TRANS,
   const int                  N,
   const int                  K,
   const void                 * ALPHA,
   const void                 * ALPHC,
   const void                 * A,
   const int                  LDA,
   const void                 * B,
   const int                  LDB,
   const void                 * BETA,
   void                       * C,
   const int                  LDC
)
{
/*
 * Purpose
 * =======
 *
 * Mjoin( PATL, ptsyr2k_nt ) performs one of the symmetric rank 2k operations
 *
 *    C := alpha * A * B' + alpha * B * A' + beta * C,
 *
 * or
 *
 *    C := alpha * A' * B + alpha * B' * A + beta * C,
 *
 * where alpha and beta are scalars, C is an n by n symmetric matrix and
 * A and B are n by k matrices in the first case and k by n  matrices in
 * the second case.
 *
 * For a  more  detailed description of  the arguments of this function,
 * see the reference implementation in the  ATLAS/src/blas/reference di-
 * rectory.
 *
 * ---------------------------------------------------------------------
 */
/*
 * .. Local Variables ..
 */
   PT_TREE_T                  root = NULL;
   PT_LVL3_TYPE_T             type;
#ifdef TREAL
   TYPE                       alpha,    beta;
#else
   TYPE                       alpha[2], beta[2];
#endif
   double                     tblks;
   unsigned int               nthreads;
   int                        nb, nbm1;
/* ..
 * .. Executable Statements ..
 *
 */
   nbm1  = ( nb = Mjoin( PATL, GetNB )() ) - 1;
   tblks = (double)( (N+nbm1) / nb ) * (double)( (N+nbm1) / nb ) *
           (double)( (K+nbm1) / nb );

   if( ( tblks <= (double)(ATL_XOVER_L3_DEFAULT) ) || ( NTHREADS <= 1 ) )
   {
#ifdef TREAL
      alpha    = *((TYPE *)(ALPHA));   beta     = *((TYPE *)(BETA ));
#else
      alpha[0] = ((TYPE *)(ALPHA))[0]; alpha[1] = ((TYPE *)(ALPHA))[1];
      beta [0] = ((TYPE *)(BETA ))[0]; beta [1] = ((TYPE *)(BETA ))[1];
#endif
      Mjoin( PATL, syr2k )( UPLO, TRANS, N, K, alpha, (TYPE *)(A), LDA,
                            (TYPE *)(B), LDB, beta, C, LDC );
      return( root );
   }

   if( tblks >= (double)(NTHREADS) ) { nthreads = NTHREADS; }
   else    { nthreads = (unsigned int)floor( tblks + 0.5 ); }

   Mjoin( PATL, ptl3settype )( &type );
   root = ATL_Ssyr2k( &type, 0, nthreads, ATTR, nb, UPLO, TRANS, AtlasTrans,
                      0, 0, N, K, ALPHA, ALPHC, A, LDA, B, LDB, BETA, C, LDC );
   ATL_thread_tree( root, ATTR );

   return( root );
/*
 * End of Mjoin( PATL, ptsyr2k_nt )
 */
}