Esempio n. 1
0
void bli_trmv_l_blk_var2( obj_t*  alpha,
                          obj_t*  a,
                          obj_t*  x,
                          trmv_t* cntl )
{
	obj_t   a11, a11_pack;
	obj_t   a21;
	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 );

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

		// Acquire partitions for A11, A21, x1, and x2.
		bli_acquire_mpart_br2tl( BLIS_SUBPART11,
		                         ij, b_alg, a, &a11 );
		bli_acquire_mpart_br2tl( BLIS_SUBPART21,
		                         ij, b_alg, a, &a21 );
		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,
		                cntl_sub_packm_a11( cntl ) );
		bli_packv_init( &x1, &x1_pack,
		                cntl_sub_packv_x1( cntl ) );

		// Copy/pack A11, x1 (if needed).
		bli_packm_int( &a11, &a11_pack,
		               cntl_sub_packm_a11( cntl ),
                       &BLIS_PACKM_SINGLE_THREADED );
		bli_packv_int( &x1, &x1_pack,
		               cntl_sub_packv_x1( cntl ) );

		// x2 = x2 + alpha * A21 * x1;
		bli_gemv_int( BLIS_NO_TRANSPOSE,
		              BLIS_NO_CONJUGATE,
	                  alpha,
		              &a21,
		              &x1_pack,
		              &BLIS_ONE,
		              &x2,
		              cntl_sub_gemv_cp( cntl ) );

		// x1 = alpha * tril( A11 ) * x1;
		bli_trmv_int( alpha,
		              &a11_pack,
		              &x1_pack,
		              cntl_sub_trmv( cntl ) );

		// Copy/unpack x1 (if x1 was packed).
		bli_unpackv_int( &x1_pack, &x1,
		                 cntl_sub_unpackv_x1( cntl ) );
	}

	// If any packing buffers were acquired within packm, release them back
	// to the memory manager.
	bli_obj_release_pack( &a11_pack );
	bli_obj_release_pack( &x1_pack );
}
Esempio n. 2
0
void bli_trsv_u_blk_var2( obj_t*  alpha,
                          obj_t*  a,
                          obj_t*  x,
                          trsv_t* cntl )
{
	obj_t   a11, a11_pack;
	obj_t   a01;
	obj_t   x1, x1_pack;
	obj_t   x0;

	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,
	               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,
		                                   cntl_blocksize( cntl ) );

		// Acquire partitions for A11, A01, x1, and x0.
		bli_acquire_mpart_br2tl( BLIS_SUBPART11,
		                         ij, b_alg, a, &a11 );
		bli_acquire_mpart_br2tl( BLIS_SUBPART01,
		                         ij, b_alg, a, &a01 );
		bli_acquire_vpart_b2f( BLIS_SUBPART1,
		                       ij, b_alg, x, &x1 );
		bli_acquire_vpart_b2f( BLIS_SUBPART0,
		                       ij, b_alg, x, &x0 );

		// Initialize objects for packing A11 and x1 (if needed).
		bli_packm_init( &a11, &a11_pack,
		                cntl_sub_packm_a11( cntl ) );
		bli_packv_init( &x1, &x1_pack,
		                cntl_sub_packv_x1( cntl ) );

		// Copy/pack A11, x1 (if needed).
		bli_packm_int( &BLIS_ONE,
		               &a11,
		               &a11_pack,
		               cntl_sub_packm_a11( cntl ) );
		bli_packv_int( &x1,
		               &x1_pack,
		               cntl_sub_packv_x1( cntl ) );

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

		// x0 = x0 - A01 * x1;
		bli_gemv_int( BLIS_NO_TRANSPOSE,
		              BLIS_NO_CONJUGATE,
	                  &BLIS_MINUS_ONE,
		              &a01,
		              &x1_pack,
		              &BLIS_ONE,
		              &x0,
		              cntl_sub_gemv_cp( cntl ) );

		// Copy/unpack x1 (if x1 was packed).
		bli_unpackv_int( &x1_pack,
		                 &x1,
		                 cntl_sub_unpackv_x1( cntl ) );
	}

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