示例#1
0
void bli_hemv_blk_var1( conj_t  conjh,
                        obj_t*  alpha,
                        obj_t*  a,
                        obj_t*  x,
                        obj_t*  beta,
                        obj_t*  y,
                        cntx_t* cntx,
                        hemv_t* cntl )
{
	obj_t   a11, a11_pack;
	obj_t   a10;
	obj_t   x1, x1_pack;
	obj_t   x0;
	obj_t   y1, y1_pack;
	obj_t   y0;

	dim_t   mn;
	dim_t   ij;
	dim_t   b_alg;

	// Even though this blocked algorithm is expressed only in terms of the
	// lower triangular case, the upper triangular case is still supported:
	// when bli_acquire_mpart_tl2br() is passed a matrix that is stored in
	// in the upper triangle, and the requested subpartition resides in the
	// lower triangle (as is the case for this algorithm), the routine fills
	// the request as if the caller had actually requested the corresponding
	// "mirror" subpartition in the upper triangle, except that it marks the
	// subpartition for transposition (and conjugation).

	// Initialize objects for packing.
	bli_obj_init_pack( &a11_pack );
	bli_obj_init_pack( &x1_pack );
	bli_obj_init_pack( &y1_pack );

	// Query dimension.
	mn = bli_obj_length( a );

	// y = beta * y;
	bli_scalv_int( beta,
	               y,
	               cntx, bli_cntl_sub_scalv( cntl ) );

	// Partition diagonally.
	for ( ij = 0; ij < mn; ij += b_alg )
	{
		// Determine the current algorithmic blocksize.
		b_alg = bli_determine_blocksize_f( ij, mn, a,
		                                   bli_cntl_bszid( cntl ), cntx );

		// Acquire partitions for A11, A10, x1, x0, y1, and y0.
		bli_acquire_mpart_tl2br( BLIS_SUBPART11,
		                         ij, b_alg, a, &a11 );
		bli_acquire_mpart_tl2br( BLIS_SUBPART10,
		                         ij, b_alg, a, &a10 );
		bli_acquire_vpart_f2b( BLIS_SUBPART1,
		                       ij, b_alg, x, &x1 );
		bli_acquire_vpart_f2b( BLIS_SUBPART0,
		                       ij, b_alg, x, &x0 );
		bli_acquire_vpart_f2b( BLIS_SUBPART1,
		                       ij, b_alg, y, &y1 );
		bli_acquire_vpart_f2b( BLIS_SUBPART0,
		                       ij, b_alg, y, &y0 );

		// Initialize objects for packing A11, x1, and y1 (if needed).
		bli_packm_init( &a11, &a11_pack,
		                cntx, bli_cntl_sub_packm_a11( cntl ) );
		bli_packv_init( &x1, &x1_pack,
		                cntx, bli_cntl_sub_packv_x1( cntl ) );
		bli_packv_init( &y1, &y1_pack,
		                cntx, bli_cntl_sub_packv_y1( cntl ) );

		// Copy/pack A11, x1, y1 (if needed).
		bli_packm_int( &a11, &a11_pack,
		               cntx, bli_cntl_sub_packm_a11( cntl ),
                       &BLIS_PACKM_SINGLE_THREADED );
		bli_packv_int( &x1, &x1_pack,
		               cntx, bli_cntl_sub_packv_x1( cntl ) );
		bli_packv_int( &y1, &y1_pack,
		               cntx, bli_cntl_sub_packv_y1( cntl ) );

		// y0 = y0 + alpha * A10' * x1;
		bli_gemv_int( bli_apply_conj( conjh, BLIS_TRANSPOSE ),
		              BLIS_NO_CONJUGATE,
	                  alpha,
		              &a10,
		              &x1_pack,
		              &BLIS_ONE,
		              &y0,
		              cntx,
		              bli_cntl_sub_gemv_t_rp( cntl ) );

		// y1 = y1 + alpha * A11 * x1;
		bli_hemv_int( conjh,
		              alpha,
		              &a11_pack,
		              &x1_pack,
		              &BLIS_ONE,
		              &y1_pack,
		              cntx,
		              bli_cntl_sub_hemv( cntl ) );

		// y1 = y1 + alpha * A10 * x0;
		bli_gemv_int( BLIS_NO_TRANSPOSE,
		              BLIS_NO_CONJUGATE,
	                  alpha,
		              &a10,
		              &x0,
		              &BLIS_ONE,
		              &y1_pack,
		              cntx,
		              bli_cntl_sub_gemv_n_rp( cntl ) );

		// Copy/unpack y1 (if y1 was packed).
		bli_unpackv_int( &y1_pack, &y1,
		                 cntx, bli_cntl_sub_unpackv_y1( cntl ) );
	}

	// If any packing buffers were acquired within packm, release them back
	// to the memory manager.
	bli_packm_release( &a11_pack, bli_cntl_sub_packm_a11( cntl ) );
	bli_packv_release( &x1_pack, bli_cntl_sub_packv_x1( cntl ) );
	bli_packv_release( &y1_pack, bli_cntl_sub_packv_y1( cntl ) );
}
示例#2
0
void bli_gemv_blk_var2( obj_t*  alpha,
                        obj_t*  a,
                        obj_t*  x,
                        obj_t*  beta,
                        obj_t*  y,
                        cntx_t* cntx,
                        gemv_t* cntl )
{
	obj_t a1, a1_pack;
	obj_t x1, x1_pack;

	dim_t n_trans;
	dim_t i;
	dim_t b_alg;

	// Initialize objects for packing.
	bli_obj_init_pack( &a1_pack );
	bli_obj_init_pack( &x1_pack );

	// Query dimension in partitioning direction.
	n_trans = bli_obj_width_after_trans( a );

	// y = beta * y;
	bli_scalv_int( beta,
	               y,
	               cntx, bli_cntl_sub_scalv( cntl ) );

	// Partition along the "k" dimension (n dimension of A).
	for ( i = 0; i < n_trans; i += b_alg )
	{
		// Determine the current algorithmic blocksize.
		b_alg = bli_determine_blocksize_f( i, n_trans, a,
		                                   bli_cntl_bszid( cntl ), cntx );

		// Acquire partitions for A1 and x1.
		bli_acquire_mpart_l2r( BLIS_SUBPART1,
		                       i, b_alg, a, &a1 );
		bli_acquire_vpart_f2b( BLIS_SUBPART1,
		                       i, b_alg, x, &x1 );

		// Initialize objects for packing A1 and x1 (if needed).
		bli_packm_init( &a1, &a1_pack,
		                cntx, bli_cntl_sub_packm_a( cntl ) );
		bli_packv_init( &x1, &x1_pack,
		                cntx, bli_cntl_sub_packv_x( cntl ) );

		// Copy/pack A1, x1 (if needed).
		bli_packm_int( &a1, &a1_pack,
		               cntx, bli_cntl_sub_packm_a( cntl ),
                       &BLIS_PACKM_SINGLE_THREADED );
		bli_packv_int( &x1, &x1_pack,
		               cntx, bli_cntl_sub_packv_x( cntl ) );

		// y = y + alpha * A1 * x1;
		bli_gemv_int( BLIS_NO_TRANSPOSE,
		              BLIS_NO_CONJUGATE,
		              alpha,
		              &a1_pack,
		              &x1_pack,
		              &BLIS_ONE,
		              y,
		              cntx,
		              bli_cntl_sub_gemv( cntl ) );
	}

	// If any packing buffers were acquired within packm, release them back
	// to the memory manager.
	bli_packm_release( &a1_pack, bli_cntl_sub_packm_a( cntl ) );
	bli_packv_release( &x1_pack, bli_cntl_sub_packv_x( cntl ) );
}
示例#3
0
void bli_trsv_u_blk_var1( obj_t*  alpha,
                          obj_t*  a,
                          obj_t*  x,
                          cntx_t* cntx,
                          trsv_t* cntl )
{
	obj_t   a11, a11_pack;
	obj_t   a12;
	obj_t   x1, x1_pack;
	obj_t   x2;

	dim_t   mn;
	dim_t   ij;
	dim_t   b_alg;

	// Initialize objects for packing.
	bli_obj_init_pack( &a11_pack );
	bli_obj_init_pack( &x1_pack );

	// Query dimension.
	mn = bli_obj_length( a );

	// x = alpha * x;
	bli_scalv_int( alpha,
	               x,
	               cntx, bli_cntl_sub_scalv( cntl ) );

	// Partition diagonally.
	for ( ij = 0; ij < mn; ij += b_alg )
	{
		// Determine the current algorithmic blocksize.
		b_alg = bli_determine_blocksize_b( ij, mn, a,
		                                   bli_cntl_bszid( cntl ), cntx );

		// Acquire partitions for A11, A12, x1, and x2.
		bli_acquire_mpart_br2tl( BLIS_SUBPART11,
		                         ij, b_alg, a, &a11 );
		bli_acquire_mpart_br2tl( BLIS_SUBPART12,
		                         ij, b_alg, a, &a12 );
		bli_acquire_vpart_b2f( BLIS_SUBPART1,
		                       ij, b_alg, x, &x1 );
		bli_acquire_vpart_b2f( BLIS_SUBPART2,
		                       ij, b_alg, x, &x2 );

		// Initialize objects for packing A11 and x1 (if needed).
		bli_packm_init( &a11, &a11_pack,
		                cntx, bli_cntl_sub_packm_a11( cntl ) );
		bli_packv_init( &x1, &x1_pack,
		                cntx, bli_cntl_sub_packv_x1( cntl ) );

		// Copy/pack A11, x1 (if needed).
		bli_packm_int( &a11, &a11_pack,
		               cntx, bli_cntl_sub_packm_a11( cntl ),
                       &BLIS_PACKM_SINGLE_THREADED );
		bli_packv_int( &x1, &x1_pack,
		               cntx, bli_cntl_sub_packv_x1( cntl ) );

		// x1 = x1 - A12 * x2;
		bli_gemv_int( BLIS_NO_TRANSPOSE,
		              BLIS_NO_CONJUGATE,
	                  &BLIS_MINUS_ONE,
		              &a12,
		              &x2,
		              &BLIS_ONE,
		              &x1_pack,
		              cntx,
		              bli_cntl_sub_gemv_rp( cntl ) );

		// x1 = x1 / tril( A11 );
		bli_trsv_int( &BLIS_ONE,
		              &a11_pack,
		              &x1_pack,
		              cntx,
		              bli_cntl_sub_trsv( cntl ) );

		// Copy/unpack x1 (if x1 was packed).
		bli_unpackv_int( &x1_pack, &x1,
		                 cntx, bli_cntl_sub_unpackv_x1( cntl ) );
	}

	// If any packing buffers were acquired within packm, release them back
	// to the memory manager.
	bli_packm_release( &a11_pack, bli_cntl_sub_packm_a11( cntl ) );
	bli_packv_release( &x1_pack, bli_cntl_sub_packv_x1( cntl ) );
}