yosys/techlibs/quicklogic/qlf_k6n10f/dsp_sim.v

// Copyright 2020-2022 F4PGA Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

`timescale 1ps/1ps

`default_nettype none

(* blackbox *)
module QL_DSP1 (
	input wire [19:0] a,
	input wire [17:0] b,
	(* clkbuf_sink *)
	input wire clk0,
	(* clkbuf_sink *)
	input wire clk1,
	input wire [ 1:0] feedback0,
	input wire [ 1:0] feedback1,
	input wire        load_acc0,
	input wire        load_acc1,
	input wire        reset0,
	input wire        reset1,
	output reg [37:0] z
);
	parameter MODE_BITS = 27'b00000000000000000000000000;
endmodule  /* QL_DSP1 */



// ---------------------------------------- //
// ----- DSP cells simulation modules ----- //
// --------- Control bits in ports -------- //
// ---------------------------------------- //

module QL_DSP2 ( // TODO: Name subject to change
	input  wire [19:0] a,
	input  wire [17:0] b,
	input  wire [ 5:0] acc_fir,
	output wire [37:0] z,
	output wire [17:0] dly_b,

	(* clkbuf_sink *)
	input  wire       clk,
	input  wire       reset,

	input  wire [2:0] feedback,
	input  wire       load_acc,
	input  wire       unsigned_a,
	input  wire       unsigned_b,

	input  wire       f_mode,
	input  wire [2:0] output_select,
	input  wire       saturate_enable,
	input  wire [5:0] shift_right,
	input  wire       round,
	input  wire       subtract,
	input  wire       register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	localparam NBITS_ACC = 64;
	localparam NBITS_A = 20;
	localparam NBITS_B = 18;
	localparam NBITS_Z = 38;

	wire [NBITS_Z-1:0] dsp_full_z;
	wire [(NBITS_Z/2)-1:0] dsp_frac0_z;
	wire [(NBITS_Z/2)-1:0] dsp_frac1_z;

	wire [NBITS_B-1:0] dsp_full_dly_b;
	wire [(NBITS_B/2)-1:0] dsp_frac0_dly_b;
	wire [(NBITS_B/2)-1:0] dsp_frac1_dly_b;

	assign z = f_mode ? {dsp_frac1_z, dsp_frac0_z} : dsp_full_z;
	assign dly_b = f_mode ? {dsp_frac1_dly_b, dsp_frac0_dly_b} : dsp_full_dly_b;

	// Output used when fmode == 1
		dsp_t1_sim_cfg_ports #(
		.NBITS_A(NBITS_A/2),
			.NBITS_B(NBITS_B/2),
			.NBITS_ACC(NBITS_ACC/2),
			.NBITS_Z(NBITS_Z/2)
		) dsp_frac0 (
			.a_i(a[(NBITS_A/2)-1:0]),
			.b_i(b[(NBITS_B/2)-1:0]),
			.z_o(dsp_frac0_z),
			.dly_b_o(dsp_frac0_dly_b),

			.acc_fir_i(acc_fir),
			.feedback_i(feedback),
			.load_acc_i(load_acc),

			.unsigned_a_i(unsigned_a),
			.unsigned_b_i(unsigned_b),

			.clock_i(clk),
			.s_reset(reset),

			.saturate_enable_i(saturate_enable),
			.output_select_i(output_select),
			.round_i(round),
			.shift_right_i(shift_right),
			.subtract_i(subtract),
			.register_inputs_i(register_inputs),
			.coef_0_i(COEFF_0[(NBITS_A/2)-1:0]),
			.coef_1_i(COEFF_1[(NBITS_A/2)-1:0]),
			.coef_2_i(COEFF_2[(NBITS_A/2)-1:0]),
			.coef_3_i(COEFF_3[(NBITS_A/2)-1:0])
		);

	// Output used when fmode == 1
		dsp_t1_sim_cfg_ports #(
		.NBITS_A(NBITS_A/2),
			.NBITS_B(NBITS_B/2),
			.NBITS_ACC(NBITS_ACC/2),
			.NBITS_Z(NBITS_Z/2)
		) dsp_frac1 (
			.a_i(a[NBITS_A-1:NBITS_A/2]),
			.b_i(b[NBITS_B-1:NBITS_B/2]),
			.z_o(dsp_frac1_z),
			.dly_b_o(dsp_frac1_dly_b),

			.acc_fir_i(acc_fir),
			.feedback_i(feedback),
			.load_acc_i(load_acc),

			.unsigned_a_i(unsigned_a),
			.unsigned_b_i(unsigned_b),

			.clock_i(clk),
			.s_reset(reset),

			.saturate_enable_i(saturate_enable),
			.output_select_i(output_select),
			.round_i(round),
			.shift_right_i(shift_right),
			.subtract_i(subtract),
			.register_inputs_i(register_inputs),
			.coef_0_i(COEFF_0[NBITS_A-1:NBITS_A/2]),
			.coef_1_i(COEFF_1[NBITS_A-1:NBITS_A/2]),
			.coef_2_i(COEFF_2[NBITS_A-1:NBITS_A/2]),
			.coef_3_i(COEFF_3[NBITS_A-1:NBITS_A/2])
		);

	// Output used when fmode == 0
		dsp_t1_sim_cfg_ports #(
			.NBITS_A(NBITS_A),
			.NBITS_B(NBITS_B),
			.NBITS_ACC(NBITS_ACC),
			.NBITS_Z(NBITS_Z)
		) dsp_full (
			.a_i(a),
			.b_i(b),
			.z_o(dsp_full_z),
			.dly_b_o(dsp_full_dly_b),

			.acc_fir_i(acc_fir),
			.feedback_i(feedback),
			.load_acc_i(load_acc),

			.unsigned_a_i(unsigned_a),
			.unsigned_b_i(unsigned_b),

			.clock_i(clk),
			.s_reset(reset),

			.saturate_enable_i(saturate_enable),
			.output_select_i(output_select),
			.round_i(round),
			.shift_right_i(shift_right),
			.subtract_i(subtract),
			.register_inputs_i(register_inputs),
			.coef_0_i(COEFF_0),
			.coef_1_i(COEFF_1),
			.coef_2_i(COEFF_2),
			.coef_3_i(COEFF_3)
		);
endmodule

module QL_DSP2_MULT ( // TODO: Name subject to change
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	input  wire       reset,

	input  wire [2:0] feedback,
	input  wire       unsigned_a,
	input  wire       unsigned_b,

	input  wire       f_mode,
	input  wire [2:0] output_select,
	input  wire       register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.clk(1'b0),
		.reset(reset),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(1'b0),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.output_select(output_select),      // unregistered output: a * b (0)
		.saturate_enable(1'b0),
		.shift_right(6'b0),
		.round(1'b0),
		.subtract(1'b0),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(a[0] => z[0]) = 0;
		(a[1] => z[0]) = 0;
		(a[2] => z[0]) = 0;
		(a[3] => z[0]) = 0;
		(a[4] => z[0]) = 0;
		(a[5] => z[0]) = 0;
		(a[6] => z[0]) = 0;
		(a[7] => z[0]) = 0;
		(a[8] => z[0]) = 0;
		(a[9] => z[0]) = 0;
		(a[10] => z[0]) = 0;
		(a[11] => z[0]) = 0;
		(a[12] => z[0]) = 0;
		(a[13] => z[0]) = 0;
		(a[14] => z[0]) = 0;
		(a[15] => z[0]) = 0;
		(a[16] => z[0]) = 0;
		(a[17] => z[0]) = 0;
		(a[18] => z[0]) = 0;
		(a[19] => z[0]) = 0;
		(b[0] => z[0]) = 0;
		(b[1] => z[0]) = 0;
		(b[2] => z[0]) = 0;
		(b[3] => z[0]) = 0;
		(b[4] => z[0]) = 0;
		(b[5] => z[0]) = 0;
		(b[6] => z[0]) = 0;
		(b[7] => z[0]) = 0;
		(b[8] => z[0]) = 0;
		(b[9] => z[0]) = 0;
		(b[10] => z[0]) = 0;
		(b[11] => z[0]) = 0;
		(b[12] => z[0]) = 0;
		(b[13] => z[0]) = 0;
		(b[14] => z[0]) = 0;
		(b[15] => z[0]) = 0;
		(b[16] => z[0]) = 0;
		(b[17] => z[0]) = 0;
		(a[0] => z[1]) = 0;
		(a[1] => z[1]) = 0;
		(a[2] => z[1]) = 0;
		(a[3] => z[1]) = 0;
		(a[4] => z[1]) = 0;
		(a[5] => z[1]) = 0;
		(a[6] => z[1]) = 0;
		(a[7] => z[1]) = 0;
		(a[8] => z[1]) = 0;
		(a[9] => z[1]) = 0;
		(a[10] => z[1]) = 0;
		(a[11] => z[1]) = 0;
		(a[12] => z[1]) = 0;
		(a[13] => z[1]) = 0;
		(a[14] => z[1]) = 0;
		(a[15] => z[1]) = 0;
		(a[16] => z[1]) = 0;
		(a[17] => z[1]) = 0;
		(a[18] => z[1]) = 0;
		(a[19] => z[1]) = 0;
		(b[0] => z[1]) = 0;
		(b[1] => z[1]) = 0;
		(b[2] => z[1]) = 0;
		(b[3] => z[1]) = 0;
		(b[4] => z[1]) = 0;
		(b[5] => z[1]) = 0;
		(b[6] => z[1]) = 0;
		(b[7] => z[1]) = 0;
		(b[8] => z[1]) = 0;
		(b[9] => z[1]) = 0;
		(b[10] => z[1]) = 0;
		(b[11] => z[1]) = 0;
		(b[12] => z[1]) = 0;
		(b[13] => z[1]) = 0;
		(b[14] => z[1]) = 0;
		(b[15] => z[1]) = 0;
		(b[16] => z[1]) = 0;
		(b[17] => z[1]) = 0;
		(a[0] => z[2]) = 0;
		(a[1] => z[2]) = 0;
		(a[2] => z[2]) = 0;
		(a[3] => z[2]) = 0;
		(a[4] => z[2]) = 0;
		(a[5] => z[2]) = 0;
		(a[6] => z[2]) = 0;
		(a[7] => z[2]) = 0;
		(a[8] => z[2]) = 0;
		(a[9] => z[2]) = 0;
		(a[10] => z[2]) = 0;
		(a[11] => z[2]) = 0;
		(a[12] => z[2]) = 0;
		(a[13] => z[2]) = 0;
		(a[14] => z[2]) = 0;
		(a[15] => z[2]) = 0;
		(a[16] => z[2]) = 0;
		(a[17] => z[2]) = 0;
		(a[18] => z[2]) = 0;
		(a[19] => z[2]) = 0;
		(b[0] => z[2]) = 0;
		(b[1] => z[2]) = 0;
		(b[2] => z[2]) = 0;
		(b[3] => z[2]) = 0;
		(b[4] => z[2]) = 0;
		(b[5] => z[2]) = 0;
		(b[6] => z[2]) = 0;
		(b[7] => z[2]) = 0;
		(b[8] => z[2]) = 0;
		(b[9] => z[2]) = 0;
		(b[10] => z[2]) = 0;
		(b[11] => z[2]) = 0;
		(b[12] => z[2]) = 0;
		(b[13] => z[2]) = 0;
		(b[14] => z[2]) = 0;
		(b[15] => z[2]) = 0;
		(b[16] => z[2]) = 0;
		(b[17] => z[2]) = 0;
		(a[0] => z[3]) = 0;
		(a[1] => z[3]) = 0;
		(a[2] => z[3]) = 0;
		(a[3] => z[3]) = 0;
		(a[4] => z[3]) = 0;
		(a[5] => z[3]) = 0;
		(a[6] => z[3]) = 0;
		(a[7] => z[3]) = 0;
		(a[8] => z[3]) = 0;
		(a[9] => z[3]) = 0;
		(a[10] => z[3]) = 0;
		(a[11] => z[3]) = 0;
		(a[12] => z[3]) = 0;
		(a[13] => z[3]) = 0;
		(a[14] => z[3]) = 0;
		(a[15] => z[3]) = 0;
		(a[16] => z[3]) = 0;
		(a[17] => z[3]) = 0;
		(a[18] => z[3]) = 0;
		(a[19] => z[3]) = 0;
		(b[0] => z[3]) = 0;
		(b[1] => z[3]) = 0;
		(b[2] => z[3]) = 0;
		(b[3] => z[3]) = 0;
		(b[4] => z[3]) = 0;
		(b[5] => z[3]) = 0;
		(b[6] => z[3]) = 0;
		(b[7] => z[3]) = 0;
		(b[8] => z[3]) = 0;
		(b[9] => z[3]) = 0;
		(b[10] => z[3]) = 0;
		(b[11] => z[3]) = 0;
		(b[12] => z[3]) = 0;
		(b[13] => z[3]) = 0;
		(b[14] => z[3]) = 0;
		(b[15] => z[3]) = 0;
		(b[16] => z[3]) = 0;
		(b[17] => z[3]) = 0;
		(a[0] => z[4]) = 0;
		(a[1] => z[4]) = 0;
		(a[2] => z[4]) = 0;
		(a[3] => z[4]) = 0;
		(a[4] => z[4]) = 0;
		(a[5] => z[4]) = 0;
		(a[6] => z[4]) = 0;
		(a[7] => z[4]) = 0;
		(a[8] => z[4]) = 0;
		(a[9] => z[4]) = 0;
		(a[10] => z[4]) = 0;
		(a[11] => z[4]) = 0;
		(a[12] => z[4]) = 0;
		(a[13] => z[4]) = 0;
		(a[14] => z[4]) = 0;
		(a[15] => z[4]) = 0;
		(a[16] => z[4]) = 0;
		(a[17] => z[4]) = 0;
		(a[18] => z[4]) = 0;
		(a[19] => z[4]) = 0;
		(b[0] => z[4]) = 0;
		(b[1] => z[4]) = 0;
		(b[2] => z[4]) = 0;
		(b[3] => z[4]) = 0;
		(b[4] => z[4]) = 0;
		(b[5] => z[4]) = 0;
		(b[6] => z[4]) = 0;
		(b[7] => z[4]) = 0;
		(b[8] => z[4]) = 0;
		(b[9] => z[4]) = 0;
		(b[10] => z[4]) = 0;
		(b[11] => z[4]) = 0;
		(b[12] => z[4]) = 0;
		(b[13] => z[4]) = 0;
		(b[14] => z[4]) = 0;
		(b[15] => z[4]) = 0;
		(b[16] => z[4]) = 0;
		(b[17] => z[4]) = 0;
		(a[0] => z[5]) = 0;
		(a[1] => z[5]) = 0;
		(a[2] => z[5]) = 0;
		(a[3] => z[5]) = 0;
		(a[4] => z[5]) = 0;
		(a[5] => z[5]) = 0;
		(a[6] => z[5]) = 0;
		(a[7] => z[5]) = 0;
		(a[8] => z[5]) = 0;
		(a[9] => z[5]) = 0;
		(a[10] => z[5]) = 0;
		(a[11] => z[5]) = 0;
		(a[12] => z[5]) = 0;
		(a[13] => z[5]) = 0;
		(a[14] => z[5]) = 0;
		(a[15] => z[5]) = 0;
		(a[16] => z[5]) = 0;
		(a[17] => z[5]) = 0;
		(a[18] => z[5]) = 0;
		(a[19] => z[5]) = 0;
		(b[0] => z[5]) = 0;
		(b[1] => z[5]) = 0;
		(b[2] => z[5]) = 0;
		(b[3] => z[5]) = 0;
		(b[4] => z[5]) = 0;
		(b[5] => z[5]) = 0;
		(b[6] => z[5]) = 0;
		(b[7] => z[5]) = 0;
		(b[8] => z[5]) = 0;
		(b[9] => z[5]) = 0;
		(b[10] => z[5]) = 0;
		(b[11] => z[5]) = 0;
		(b[12] => z[5]) = 0;
		(b[13] => z[5]) = 0;
		(b[14] => z[5]) = 0;
		(b[15] => z[5]) = 0;
		(b[16] => z[5]) = 0;
		(b[17] => z[5]) = 0;
		(a[0] => z[6]) = 0;
		(a[1] => z[6]) = 0;
		(a[2] => z[6]) = 0;
		(a[3] => z[6]) = 0;
		(a[4] => z[6]) = 0;
		(a[5] => z[6]) = 0;
		(a[6] => z[6]) = 0;
		(a[7] => z[6]) = 0;
		(a[8] => z[6]) = 0;
		(a[9] => z[6]) = 0;
		(a[10] => z[6]) = 0;
		(a[11] => z[6]) = 0;
		(a[12] => z[6]) = 0;
		(a[13] => z[6]) = 0;
		(a[14] => z[6]) = 0;
		(a[15] => z[6]) = 0;
		(a[16] => z[6]) = 0;
		(a[17] => z[6]) = 0;
		(a[18] => z[6]) = 0;
		(a[19] => z[6]) = 0;
		(b[0] => z[6]) = 0;
		(b[1] => z[6]) = 0;
		(b[2] => z[6]) = 0;
		(b[3] => z[6]) = 0;
		(b[4] => z[6]) = 0;
		(b[5] => z[6]) = 0;
		(b[6] => z[6]) = 0;
		(b[7] => z[6]) = 0;
		(b[8] => z[6]) = 0;
		(b[9] => z[6]) = 0;
		(b[10] => z[6]) = 0;
		(b[11] => z[6]) = 0;
		(b[12] => z[6]) = 0;
		(b[13] => z[6]) = 0;
		(b[14] => z[6]) = 0;
		(b[15] => z[6]) = 0;
		(b[16] => z[6]) = 0;
		(b[17] => z[6]) = 0;
		(a[0] => z[7]) = 0;
		(a[1] => z[7]) = 0;
		(a[2] => z[7]) = 0;
		(a[3] => z[7]) = 0;
		(a[4] => z[7]) = 0;
		(a[5] => z[7]) = 0;
		(a[6] => z[7]) = 0;
		(a[7] => z[7]) = 0;
		(a[8] => z[7]) = 0;
		(a[9] => z[7]) = 0;
		(a[10] => z[7]) = 0;
		(a[11] => z[7]) = 0;
		(a[12] => z[7]) = 0;
		(a[13] => z[7]) = 0;
		(a[14] => z[7]) = 0;
		(a[15] => z[7]) = 0;
		(a[16] => z[7]) = 0;
		(a[17] => z[7]) = 0;
		(a[18] => z[7]) = 0;
		(a[19] => z[7]) = 0;
		(b[0] => z[7]) = 0;
		(b[1] => z[7]) = 0;
		(b[2] => z[7]) = 0;
		(b[3] => z[7]) = 0;
		(b[4] => z[7]) = 0;
		(b[5] => z[7]) = 0;
		(b[6] => z[7]) = 0;
		(b[7] => z[7]) = 0;
		(b[8] => z[7]) = 0;
		(b[9] => z[7]) = 0;
		(b[10] => z[7]) = 0;
		(b[11] => z[7]) = 0;
		(b[12] => z[7]) = 0;
		(b[13] => z[7]) = 0;
		(b[14] => z[7]) = 0;
		(b[15] => z[7]) = 0;
		(b[16] => z[7]) = 0;
		(b[17] => z[7]) = 0;
		(a[0] => z[8]) = 0;
		(a[1] => z[8]) = 0;
		(a[2] => z[8]) = 0;
		(a[3] => z[8]) = 0;
		(a[4] => z[8]) = 0;
		(a[5] => z[8]) = 0;
		(a[6] => z[8]) = 0;
		(a[7] => z[8]) = 0;
		(a[8] => z[8]) = 0;
		(a[9] => z[8]) = 0;
		(a[10] => z[8]) = 0;
		(a[11] => z[8]) = 0;
		(a[12] => z[8]) = 0;
		(a[13] => z[8]) = 0;
		(a[14] => z[8]) = 0;
		(a[15] => z[8]) = 0;
		(a[16] => z[8]) = 0;
		(a[17] => z[8]) = 0;
		(a[18] => z[8]) = 0;
		(a[19] => z[8]) = 0;
		(b[0] => z[8]) = 0;
		(b[1] => z[8]) = 0;
		(b[2] => z[8]) = 0;
		(b[3] => z[8]) = 0;
		(b[4] => z[8]) = 0;
		(b[5] => z[8]) = 0;
		(b[6] => z[8]) = 0;
		(b[7] => z[8]) = 0;
		(b[8] => z[8]) = 0;
		(b[9] => z[8]) = 0;
		(b[10] => z[8]) = 0;
		(b[11] => z[8]) = 0;
		(b[12] => z[8]) = 0;
		(b[13] => z[8]) = 0;
		(b[14] => z[8]) = 0;
		(b[15] => z[8]) = 0;
		(b[16] => z[8]) = 0;
		(b[17] => z[8]) = 0;
		(a[0] => z[9]) = 0;
		(a[1] => z[9]) = 0;
		(a[2] => z[9]) = 0;
		(a[3] => z[9]) = 0;
		(a[4] => z[9]) = 0;
		(a[5] => z[9]) = 0;
		(a[6] => z[9]) = 0;
		(a[7] => z[9]) = 0;
		(a[8] => z[9]) = 0;
		(a[9] => z[9]) = 0;
		(a[10] => z[9]) = 0;
		(a[11] => z[9]) = 0;
		(a[12] => z[9]) = 0;
		(a[13] => z[9]) = 0;
		(a[14] => z[9]) = 0;
		(a[15] => z[9]) = 0;
		(a[16] => z[9]) = 0;
		(a[17] => z[9]) = 0;
		(a[18] => z[9]) = 0;
		(a[19] => z[9]) = 0;
		(b[0] => z[9]) = 0;
		(b[1] => z[9]) = 0;
		(b[2] => z[9]) = 0;
		(b[3] => z[9]) = 0;
		(b[4] => z[9]) = 0;
		(b[5] => z[9]) = 0;
		(b[6] => z[9]) = 0;
		(b[7] => z[9]) = 0;
		(b[8] => z[9]) = 0;
		(b[9] => z[9]) = 0;
		(b[10] => z[9]) = 0;
		(b[11] => z[9]) = 0;
		(b[12] => z[9]) = 0;
		(b[13] => z[9]) = 0;
		(b[14] => z[9]) = 0;
		(b[15] => z[9]) = 0;
		(b[16] => z[9]) = 0;
		(b[17] => z[9]) = 0;
		(a[0] => z[10]) = 0;
		(a[1] => z[10]) = 0;
		(a[2] => z[10]) = 0;
		(a[3] => z[10]) = 0;
		(a[4] => z[10]) = 0;
		(a[5] => z[10]) = 0;
		(a[6] => z[10]) = 0;
		(a[7] => z[10]) = 0;
		(a[8] => z[10]) = 0;
		(a[9] => z[10]) = 0;
		(a[10] => z[10]) = 0;
		(a[11] => z[10]) = 0;
		(a[12] => z[10]) = 0;
		(a[13] => z[10]) = 0;
		(a[14] => z[10]) = 0;
		(a[15] => z[10]) = 0;
		(a[16] => z[10]) = 0;
		(a[17] => z[10]) = 0;
		(a[18] => z[10]) = 0;
		(a[19] => z[10]) = 0;
		(b[0] => z[10]) = 0;
		(b[1] => z[10]) = 0;
		(b[2] => z[10]) = 0;
		(b[3] => z[10]) = 0;
		(b[4] => z[10]) = 0;
		(b[5] => z[10]) = 0;
		(b[6] => z[10]) = 0;
		(b[7] => z[10]) = 0;
		(b[8] => z[10]) = 0;
		(b[9] => z[10]) = 0;
		(b[10] => z[10]) = 0;
		(b[11] => z[10]) = 0;
		(b[12] => z[10]) = 0;
		(b[13] => z[10]) = 0;
		(b[14] => z[10]) = 0;
		(b[15] => z[10]) = 0;
		(b[16] => z[10]) = 0;
		(b[17] => z[10]) = 0;
		(a[0] => z[11]) = 0;
		(a[1] => z[11]) = 0;
		(a[2] => z[11]) = 0;
		(a[3] => z[11]) = 0;
		(a[4] => z[11]) = 0;
		(a[5] => z[11]) = 0;
		(a[6] => z[11]) = 0;
		(a[7] => z[11]) = 0;
		(a[8] => z[11]) = 0;
		(a[9] => z[11]) = 0;
		(a[10] => z[11]) = 0;
		(a[11] => z[11]) = 0;
		(a[12] => z[11]) = 0;
		(a[13] => z[11]) = 0;
		(a[14] => z[11]) = 0;
		(a[15] => z[11]) = 0;
		(a[16] => z[11]) = 0;
		(a[17] => z[11]) = 0;
		(a[18] => z[11]) = 0;
		(a[19] => z[11]) = 0;
		(b[0] => z[11]) = 0;
		(b[1] => z[11]) = 0;
		(b[2] => z[11]) = 0;
		(b[3] => z[11]) = 0;
		(b[4] => z[11]) = 0;
		(b[5] => z[11]) = 0;
		(b[6] => z[11]) = 0;
		(b[7] => z[11]) = 0;
		(b[8] => z[11]) = 0;
		(b[9] => z[11]) = 0;
		(b[10] => z[11]) = 0;
		(b[11] => z[11]) = 0;
		(b[12] => z[11]) = 0;
		(b[13] => z[11]) = 0;
		(b[14] => z[11]) = 0;
		(b[15] => z[11]) = 0;
		(b[16] => z[11]) = 0;
		(b[17] => z[11]) = 0;
		(a[0] => z[12]) = 0;
		(a[1] => z[12]) = 0;
		(a[2] => z[12]) = 0;
		(a[3] => z[12]) = 0;
		(a[4] => z[12]) = 0;
		(a[5] => z[12]) = 0;
		(a[6] => z[12]) = 0;
		(a[7] => z[12]) = 0;
		(a[8] => z[12]) = 0;
		(a[9] => z[12]) = 0;
		(a[10] => z[12]) = 0;
		(a[11] => z[12]) = 0;
		(a[12] => z[12]) = 0;
		(a[13] => z[12]) = 0;
		(a[14] => z[12]) = 0;
		(a[15] => z[12]) = 0;
		(a[16] => z[12]) = 0;
		(a[17] => z[12]) = 0;
		(a[18] => z[12]) = 0;
		(a[19] => z[12]) = 0;
		(b[0] => z[12]) = 0;
		(b[1] => z[12]) = 0;
		(b[2] => z[12]) = 0;
		(b[3] => z[12]) = 0;
		(b[4] => z[12]) = 0;
		(b[5] => z[12]) = 0;
		(b[6] => z[12]) = 0;
		(b[7] => z[12]) = 0;
		(b[8] => z[12]) = 0;
		(b[9] => z[12]) = 0;
		(b[10] => z[12]) = 0;
		(b[11] => z[12]) = 0;
		(b[12] => z[12]) = 0;
		(b[13] => z[12]) = 0;
		(b[14] => z[12]) = 0;
		(b[15] => z[12]) = 0;
		(b[16] => z[12]) = 0;
		(b[17] => z[12]) = 0;
		(a[0] => z[13]) = 0;
		(a[1] => z[13]) = 0;
		(a[2] => z[13]) = 0;
		(a[3] => z[13]) = 0;
		(a[4] => z[13]) = 0;
		(a[5] => z[13]) = 0;
		(a[6] => z[13]) = 0;
		(a[7] => z[13]) = 0;
		(a[8] => z[13]) = 0;
		(a[9] => z[13]) = 0;
		(a[10] => z[13]) = 0;
		(a[11] => z[13]) = 0;
		(a[12] => z[13]) = 0;
		(a[13] => z[13]) = 0;
		(a[14] => z[13]) = 0;
		(a[15] => z[13]) = 0;
		(a[16] => z[13]) = 0;
		(a[17] => z[13]) = 0;
		(a[18] => z[13]) = 0;
		(a[19] => z[13]) = 0;
		(b[0] => z[13]) = 0;
		(b[1] => z[13]) = 0;
		(b[2] => z[13]) = 0;
		(b[3] => z[13]) = 0;
		(b[4] => z[13]) = 0;
		(b[5] => z[13]) = 0;
		(b[6] => z[13]) = 0;
		(b[7] => z[13]) = 0;
		(b[8] => z[13]) = 0;
		(b[9] => z[13]) = 0;
		(b[10] => z[13]) = 0;
		(b[11] => z[13]) = 0;
		(b[12] => z[13]) = 0;
		(b[13] => z[13]) = 0;
		(b[14] => z[13]) = 0;
		(b[15] => z[13]) = 0;
		(b[16] => z[13]) = 0;
		(b[17] => z[13]) = 0;
		(a[0] => z[14]) = 0;
		(a[1] => z[14]) = 0;
		(a[2] => z[14]) = 0;
		(a[3] => z[14]) = 0;
		(a[4] => z[14]) = 0;
		(a[5] => z[14]) = 0;
		(a[6] => z[14]) = 0;
		(a[7] => z[14]) = 0;
		(a[8] => z[14]) = 0;
		(a[9] => z[14]) = 0;
		(a[10] => z[14]) = 0;
		(a[11] => z[14]) = 0;
		(a[12] => z[14]) = 0;
		(a[13] => z[14]) = 0;
		(a[14] => z[14]) = 0;
		(a[15] => z[14]) = 0;
		(a[16] => z[14]) = 0;
		(a[17] => z[14]) = 0;
		(a[18] => z[14]) = 0;
		(a[19] => z[14]) = 0;
		(b[0] => z[14]) = 0;
		(b[1] => z[14]) = 0;
		(b[2] => z[14]) = 0;
		(b[3] => z[14]) = 0;
		(b[4] => z[14]) = 0;
		(b[5] => z[14]) = 0;
		(b[6] => z[14]) = 0;
		(b[7] => z[14]) = 0;
		(b[8] => z[14]) = 0;
		(b[9] => z[14]) = 0;
		(b[10] => z[14]) = 0;
		(b[11] => z[14]) = 0;
		(b[12] => z[14]) = 0;
		(b[13] => z[14]) = 0;
		(b[14] => z[14]) = 0;
		(b[15] => z[14]) = 0;
		(b[16] => z[14]) = 0;
		(b[17] => z[14]) = 0;
		(a[0] => z[15]) = 0;
		(a[1] => z[15]) = 0;
		(a[2] => z[15]) = 0;
		(a[3] => z[15]) = 0;
		(a[4] => z[15]) = 0;
		(a[5] => z[15]) = 0;
		(a[6] => z[15]) = 0;
		(a[7] => z[15]) = 0;
		(a[8] => z[15]) = 0;
		(a[9] => z[15]) = 0;
		(a[10] => z[15]) = 0;
		(a[11] => z[15]) = 0;
		(a[12] => z[15]) = 0;
		(a[13] => z[15]) = 0;
		(a[14] => z[15]) = 0;
		(a[15] => z[15]) = 0;
		(a[16] => z[15]) = 0;
		(a[17] => z[15]) = 0;
		(a[18] => z[15]) = 0;
		(a[19] => z[15]) = 0;
		(b[0] => z[15]) = 0;
		(b[1] => z[15]) = 0;
		(b[2] => z[15]) = 0;
		(b[3] => z[15]) = 0;
		(b[4] => z[15]) = 0;
		(b[5] => z[15]) = 0;
		(b[6] => z[15]) = 0;
		(b[7] => z[15]) = 0;
		(b[8] => z[15]) = 0;
		(b[9] => z[15]) = 0;
		(b[10] => z[15]) = 0;
		(b[11] => z[15]) = 0;
		(b[12] => z[15]) = 0;
		(b[13] => z[15]) = 0;
		(b[14] => z[15]) = 0;
		(b[15] => z[15]) = 0;
		(b[16] => z[15]) = 0;
		(b[17] => z[15]) = 0;
		(a[0] => z[16]) = 0;
		(a[1] => z[16]) = 0;
		(a[2] => z[16]) = 0;
		(a[3] => z[16]) = 0;
		(a[4] => z[16]) = 0;
		(a[5] => z[16]) = 0;
		(a[6] => z[16]) = 0;
		(a[7] => z[16]) = 0;
		(a[8] => z[16]) = 0;
		(a[9] => z[16]) = 0;
		(a[10] => z[16]) = 0;
		(a[11] => z[16]) = 0;
		(a[12] => z[16]) = 0;
		(a[13] => z[16]) = 0;
		(a[14] => z[16]) = 0;
		(a[15] => z[16]) = 0;
		(a[16] => z[16]) = 0;
		(a[17] => z[16]) = 0;
		(a[18] => z[16]) = 0;
		(a[19] => z[16]) = 0;
		(b[0] => z[16]) = 0;
		(b[1] => z[16]) = 0;
		(b[2] => z[16]) = 0;
		(b[3] => z[16]) = 0;
		(b[4] => z[16]) = 0;
		(b[5] => z[16]) = 0;
		(b[6] => z[16]) = 0;
		(b[7] => z[16]) = 0;
		(b[8] => z[16]) = 0;
		(b[9] => z[16]) = 0;
		(b[10] => z[16]) = 0;
		(b[11] => z[16]) = 0;
		(b[12] => z[16]) = 0;
		(b[13] => z[16]) = 0;
		(b[14] => z[16]) = 0;
		(b[15] => z[16]) = 0;
		(b[16] => z[16]) = 0;
		(b[17] => z[16]) = 0;
		(a[0] => z[17]) = 0;
		(a[1] => z[17]) = 0;
		(a[2] => z[17]) = 0;
		(a[3] => z[17]) = 0;
		(a[4] => z[17]) = 0;
		(a[5] => z[17]) = 0;
		(a[6] => z[17]) = 0;
		(a[7] => z[17]) = 0;
		(a[8] => z[17]) = 0;
		(a[9] => z[17]) = 0;
		(a[10] => z[17]) = 0;
		(a[11] => z[17]) = 0;
		(a[12] => z[17]) = 0;
		(a[13] => z[17]) = 0;
		(a[14] => z[17]) = 0;
		(a[15] => z[17]) = 0;
		(a[16] => z[17]) = 0;
		(a[17] => z[17]) = 0;
		(a[18] => z[17]) = 0;
		(a[19] => z[17]) = 0;
		(b[0] => z[17]) = 0;
		(b[1] => z[17]) = 0;
		(b[2] => z[17]) = 0;
		(b[3] => z[17]) = 0;
		(b[4] => z[17]) = 0;
		(b[5] => z[17]) = 0;
		(b[6] => z[17]) = 0;
		(b[7] => z[17]) = 0;
		(b[8] => z[17]) = 0;
		(b[9] => z[17]) = 0;
		(b[10] => z[17]) = 0;
		(b[11] => z[17]) = 0;
		(b[12] => z[17]) = 0;
		(b[13] => z[17]) = 0;
		(b[14] => z[17]) = 0;
		(b[15] => z[17]) = 0;
		(b[16] => z[17]) = 0;
		(b[17] => z[17]) = 0;
		(a[0] => z[18]) = 0;
		(a[1] => z[18]) = 0;
		(a[2] => z[18]) = 0;
		(a[3] => z[18]) = 0;
		(a[4] => z[18]) = 0;
		(a[5] => z[18]) = 0;
		(a[6] => z[18]) = 0;
		(a[7] => z[18]) = 0;
		(a[8] => z[18]) = 0;
		(a[9] => z[18]) = 0;
		(a[10] => z[18]) = 0;
		(a[11] => z[18]) = 0;
		(a[12] => z[18]) = 0;
		(a[13] => z[18]) = 0;
		(a[14] => z[18]) = 0;
		(a[15] => z[18]) = 0;
		(a[16] => z[18]) = 0;
		(a[17] => z[18]) = 0;
		(a[18] => z[18]) = 0;
		(a[19] => z[18]) = 0;
		(b[0] => z[18]) = 0;
		(b[1] => z[18]) = 0;
		(b[2] => z[18]) = 0;
		(b[3] => z[18]) = 0;
		(b[4] => z[18]) = 0;
		(b[5] => z[18]) = 0;
		(b[6] => z[18]) = 0;
		(b[7] => z[18]) = 0;
		(b[8] => z[18]) = 0;
		(b[9] => z[18]) = 0;
		(b[10] => z[18]) = 0;
		(b[11] => z[18]) = 0;
		(b[12] => z[18]) = 0;
		(b[13] => z[18]) = 0;
		(b[14] => z[18]) = 0;
		(b[15] => z[18]) = 0;
		(b[16] => z[18]) = 0;
		(b[17] => z[18]) = 0;
		(a[0] => z[19]) = 0;
		(a[1] => z[19]) = 0;
		(a[2] => z[19]) = 0;
		(a[3] => z[19]) = 0;
		(a[4] => z[19]) = 0;
		(a[5] => z[19]) = 0;
		(a[6] => z[19]) = 0;
		(a[7] => z[19]) = 0;
		(a[8] => z[19]) = 0;
		(a[9] => z[19]) = 0;
		(a[10] => z[19]) = 0;
		(a[11] => z[19]) = 0;
		(a[12] => z[19]) = 0;
		(a[13] => z[19]) = 0;
		(a[14] => z[19]) = 0;
		(a[15] => z[19]) = 0;
		(a[16] => z[19]) = 0;
		(a[17] => z[19]) = 0;
		(a[18] => z[19]) = 0;
		(a[19] => z[19]) = 0;
		(b[0] => z[19]) = 0;
		(b[1] => z[19]) = 0;
		(b[2] => z[19]) = 0;
		(b[3] => z[19]) = 0;
		(b[4] => z[19]) = 0;
		(b[5] => z[19]) = 0;
		(b[6] => z[19]) = 0;
		(b[7] => z[19]) = 0;
		(b[8] => z[19]) = 0;
		(b[9] => z[19]) = 0;
		(b[10] => z[19]) = 0;
		(b[11] => z[19]) = 0;
		(b[12] => z[19]) = 0;
		(b[13] => z[19]) = 0;
		(b[14] => z[19]) = 0;
		(b[15] => z[19]) = 0;
		(b[16] => z[19]) = 0;
		(b[17] => z[19]) = 0;
		(a[0] => z[20]) = 0;
		(a[1] => z[20]) = 0;
		(a[2] => z[20]) = 0;
		(a[3] => z[20]) = 0;
		(a[4] => z[20]) = 0;
		(a[5] => z[20]) = 0;
		(a[6] => z[20]) = 0;
		(a[7] => z[20]) = 0;
		(a[8] => z[20]) = 0;
		(a[9] => z[20]) = 0;
		(a[10] => z[20]) = 0;
		(a[11] => z[20]) = 0;
		(a[12] => z[20]) = 0;
		(a[13] => z[20]) = 0;
		(a[14] => z[20]) = 0;
		(a[15] => z[20]) = 0;
		(a[16] => z[20]) = 0;
		(a[17] => z[20]) = 0;
		(a[18] => z[20]) = 0;
		(a[19] => z[20]) = 0;
		(b[0] => z[20]) = 0;
		(b[1] => z[20]) = 0;
		(b[2] => z[20]) = 0;
		(b[3] => z[20]) = 0;
		(b[4] => z[20]) = 0;
		(b[5] => z[20]) = 0;
		(b[6] => z[20]) = 0;
		(b[7] => z[20]) = 0;
		(b[8] => z[20]) = 0;
		(b[9] => z[20]) = 0;
		(b[10] => z[20]) = 0;
		(b[11] => z[20]) = 0;
		(b[12] => z[20]) = 0;
		(b[13] => z[20]) = 0;
		(b[14] => z[20]) = 0;
		(b[15] => z[20]) = 0;
		(b[16] => z[20]) = 0;
		(b[17] => z[20]) = 0;
		(a[0] => z[21]) = 0;
		(a[1] => z[21]) = 0;
		(a[2] => z[21]) = 0;
		(a[3] => z[21]) = 0;
		(a[4] => z[21]) = 0;
		(a[5] => z[21]) = 0;
		(a[6] => z[21]) = 0;
		(a[7] => z[21]) = 0;
		(a[8] => z[21]) = 0;
		(a[9] => z[21]) = 0;
		(a[10] => z[21]) = 0;
		(a[11] => z[21]) = 0;
		(a[12] => z[21]) = 0;
		(a[13] => z[21]) = 0;
		(a[14] => z[21]) = 0;
		(a[15] => z[21]) = 0;
		(a[16] => z[21]) = 0;
		(a[17] => z[21]) = 0;
		(a[18] => z[21]) = 0;
		(a[19] => z[21]) = 0;
		(b[0] => z[21]) = 0;
		(b[1] => z[21]) = 0;
		(b[2] => z[21]) = 0;
		(b[3] => z[21]) = 0;
		(b[4] => z[21]) = 0;
		(b[5] => z[21]) = 0;
		(b[6] => z[21]) = 0;
		(b[7] => z[21]) = 0;
		(b[8] => z[21]) = 0;
		(b[9] => z[21]) = 0;
		(b[10] => z[21]) = 0;
		(b[11] => z[21]) = 0;
		(b[12] => z[21]) = 0;
		(b[13] => z[21]) = 0;
		(b[14] => z[21]) = 0;
		(b[15] => z[21]) = 0;
		(b[16] => z[21]) = 0;
		(b[17] => z[21]) = 0;
		(a[0] => z[22]) = 0;
		(a[1] => z[22]) = 0;
		(a[2] => z[22]) = 0;
		(a[3] => z[22]) = 0;
		(a[4] => z[22]) = 0;
		(a[5] => z[22]) = 0;
		(a[6] => z[22]) = 0;
		(a[7] => z[22]) = 0;
		(a[8] => z[22]) = 0;
		(a[9] => z[22]) = 0;
		(a[10] => z[22]) = 0;
		(a[11] => z[22]) = 0;
		(a[12] => z[22]) = 0;
		(a[13] => z[22]) = 0;
		(a[14] => z[22]) = 0;
		(a[15] => z[22]) = 0;
		(a[16] => z[22]) = 0;
		(a[17] => z[22]) = 0;
		(a[18] => z[22]) = 0;
		(a[19] => z[22]) = 0;
		(b[0] => z[22]) = 0;
		(b[1] => z[22]) = 0;
		(b[2] => z[22]) = 0;
		(b[3] => z[22]) = 0;
		(b[4] => z[22]) = 0;
		(b[5] => z[22]) = 0;
		(b[6] => z[22]) = 0;
		(b[7] => z[22]) = 0;
		(b[8] => z[22]) = 0;
		(b[9] => z[22]) = 0;
		(b[10] => z[22]) = 0;
		(b[11] => z[22]) = 0;
		(b[12] => z[22]) = 0;
		(b[13] => z[22]) = 0;
		(b[14] => z[22]) = 0;
		(b[15] => z[22]) = 0;
		(b[16] => z[22]) = 0;
		(b[17] => z[22]) = 0;
		(a[0] => z[23]) = 0;
		(a[1] => z[23]) = 0;
		(a[2] => z[23]) = 0;
		(a[3] => z[23]) = 0;
		(a[4] => z[23]) = 0;
		(a[5] => z[23]) = 0;
		(a[6] => z[23]) = 0;
		(a[7] => z[23]) = 0;
		(a[8] => z[23]) = 0;
		(a[9] => z[23]) = 0;
		(a[10] => z[23]) = 0;
		(a[11] => z[23]) = 0;
		(a[12] => z[23]) = 0;
		(a[13] => z[23]) = 0;
		(a[14] => z[23]) = 0;
		(a[15] => z[23]) = 0;
		(a[16] => z[23]) = 0;
		(a[17] => z[23]) = 0;
		(a[18] => z[23]) = 0;
		(a[19] => z[23]) = 0;
		(b[0] => z[23]) = 0;
		(b[1] => z[23]) = 0;
		(b[2] => z[23]) = 0;
		(b[3] => z[23]) = 0;
		(b[4] => z[23]) = 0;
		(b[5] => z[23]) = 0;
		(b[6] => z[23]) = 0;
		(b[7] => z[23]) = 0;
		(b[8] => z[23]) = 0;
		(b[9] => z[23]) = 0;
		(b[10] => z[23]) = 0;
		(b[11] => z[23]) = 0;
		(b[12] => z[23]) = 0;
		(b[13] => z[23]) = 0;
		(b[14] => z[23]) = 0;
		(b[15] => z[23]) = 0;
		(b[16] => z[23]) = 0;
		(b[17] => z[23]) = 0;
		(a[0] => z[24]) = 0;
		(a[1] => z[24]) = 0;
		(a[2] => z[24]) = 0;
		(a[3] => z[24]) = 0;
		(a[4] => z[24]) = 0;
		(a[5] => z[24]) = 0;
		(a[6] => z[24]) = 0;
		(a[7] => z[24]) = 0;
		(a[8] => z[24]) = 0;
		(a[9] => z[24]) = 0;
		(a[10] => z[24]) = 0;
		(a[11] => z[24]) = 0;
		(a[12] => z[24]) = 0;
		(a[13] => z[24]) = 0;
		(a[14] => z[24]) = 0;
		(a[15] => z[24]) = 0;
		(a[16] => z[24]) = 0;
		(a[17] => z[24]) = 0;
		(a[18] => z[24]) = 0;
		(a[19] => z[24]) = 0;
		(b[0] => z[24]) = 0;
		(b[1] => z[24]) = 0;
		(b[2] => z[24]) = 0;
		(b[3] => z[24]) = 0;
		(b[4] => z[24]) = 0;
		(b[5] => z[24]) = 0;
		(b[6] => z[24]) = 0;
		(b[7] => z[24]) = 0;
		(b[8] => z[24]) = 0;
		(b[9] => z[24]) = 0;
		(b[10] => z[24]) = 0;
		(b[11] => z[24]) = 0;
		(b[12] => z[24]) = 0;
		(b[13] => z[24]) = 0;
		(b[14] => z[24]) = 0;
		(b[15] => z[24]) = 0;
		(b[16] => z[24]) = 0;
		(b[17] => z[24]) = 0;
		(a[0] => z[25]) = 0;
		(a[1] => z[25]) = 0;
		(a[2] => z[25]) = 0;
		(a[3] => z[25]) = 0;
		(a[4] => z[25]) = 0;
		(a[5] => z[25]) = 0;
		(a[6] => z[25]) = 0;
		(a[7] => z[25]) = 0;
		(a[8] => z[25]) = 0;
		(a[9] => z[25]) = 0;
		(a[10] => z[25]) = 0;
		(a[11] => z[25]) = 0;
		(a[12] => z[25]) = 0;
		(a[13] => z[25]) = 0;
		(a[14] => z[25]) = 0;
		(a[15] => z[25]) = 0;
		(a[16] => z[25]) = 0;
		(a[17] => z[25]) = 0;
		(a[18] => z[25]) = 0;
		(a[19] => z[25]) = 0;
		(b[0] => z[25]) = 0;
		(b[1] => z[25]) = 0;
		(b[2] => z[25]) = 0;
		(b[3] => z[25]) = 0;
		(b[4] => z[25]) = 0;
		(b[5] => z[25]) = 0;
		(b[6] => z[25]) = 0;
		(b[7] => z[25]) = 0;
		(b[8] => z[25]) = 0;
		(b[9] => z[25]) = 0;
		(b[10] => z[25]) = 0;
		(b[11] => z[25]) = 0;
		(b[12] => z[25]) = 0;
		(b[13] => z[25]) = 0;
		(b[14] => z[25]) = 0;
		(b[15] => z[25]) = 0;
		(b[16] => z[25]) = 0;
		(b[17] => z[25]) = 0;
		(a[0] => z[26]) = 0;
		(a[1] => z[26]) = 0;
		(a[2] => z[26]) = 0;
		(a[3] => z[26]) = 0;
		(a[4] => z[26]) = 0;
		(a[5] => z[26]) = 0;
		(a[6] => z[26]) = 0;
		(a[7] => z[26]) = 0;
		(a[8] => z[26]) = 0;
		(a[9] => z[26]) = 0;
		(a[10] => z[26]) = 0;
		(a[11] => z[26]) = 0;
		(a[12] => z[26]) = 0;
		(a[13] => z[26]) = 0;
		(a[14] => z[26]) = 0;
		(a[15] => z[26]) = 0;
		(a[16] => z[26]) = 0;
		(a[17] => z[26]) = 0;
		(a[18] => z[26]) = 0;
		(a[19] => z[26]) = 0;
		(b[0] => z[26]) = 0;
		(b[1] => z[26]) = 0;
		(b[2] => z[26]) = 0;
		(b[3] => z[26]) = 0;
		(b[4] => z[26]) = 0;
		(b[5] => z[26]) = 0;
		(b[6] => z[26]) = 0;
		(b[7] => z[26]) = 0;
		(b[8] => z[26]) = 0;
		(b[9] => z[26]) = 0;
		(b[10] => z[26]) = 0;
		(b[11] => z[26]) = 0;
		(b[12] => z[26]) = 0;
		(b[13] => z[26]) = 0;
		(b[14] => z[26]) = 0;
		(b[15] => z[26]) = 0;
		(b[16] => z[26]) = 0;
		(b[17] => z[26]) = 0;
		(a[0] => z[27]) = 0;
		(a[1] => z[27]) = 0;
		(a[2] => z[27]) = 0;
		(a[3] => z[27]) = 0;
		(a[4] => z[27]) = 0;
		(a[5] => z[27]) = 0;
		(a[6] => z[27]) = 0;
		(a[7] => z[27]) = 0;
		(a[8] => z[27]) = 0;
		(a[9] => z[27]) = 0;
		(a[10] => z[27]) = 0;
		(a[11] => z[27]) = 0;
		(a[12] => z[27]) = 0;
		(a[13] => z[27]) = 0;
		(a[14] => z[27]) = 0;
		(a[15] => z[27]) = 0;
		(a[16] => z[27]) = 0;
		(a[17] => z[27]) = 0;
		(a[18] => z[27]) = 0;
		(a[19] => z[27]) = 0;
		(b[0] => z[27]) = 0;
		(b[1] => z[27]) = 0;
		(b[2] => z[27]) = 0;
		(b[3] => z[27]) = 0;
		(b[4] => z[27]) = 0;
		(b[5] => z[27]) = 0;
		(b[6] => z[27]) = 0;
		(b[7] => z[27]) = 0;
		(b[8] => z[27]) = 0;
		(b[9] => z[27]) = 0;
		(b[10] => z[27]) = 0;
		(b[11] => z[27]) = 0;
		(b[12] => z[27]) = 0;
		(b[13] => z[27]) = 0;
		(b[14] => z[27]) = 0;
		(b[15] => z[27]) = 0;
		(b[16] => z[27]) = 0;
		(b[17] => z[27]) = 0;
		(a[0] => z[28]) = 0;
		(a[1] => z[28]) = 0;
		(a[2] => z[28]) = 0;
		(a[3] => z[28]) = 0;
		(a[4] => z[28]) = 0;
		(a[5] => z[28]) = 0;
		(a[6] => z[28]) = 0;
		(a[7] => z[28]) = 0;
		(a[8] => z[28]) = 0;
		(a[9] => z[28]) = 0;
		(a[10] => z[28]) = 0;
		(a[11] => z[28]) = 0;
		(a[12] => z[28]) = 0;
		(a[13] => z[28]) = 0;
		(a[14] => z[28]) = 0;
		(a[15] => z[28]) = 0;
		(a[16] => z[28]) = 0;
		(a[17] => z[28]) = 0;
		(a[18] => z[28]) = 0;
		(a[19] => z[28]) = 0;
		(b[0] => z[28]) = 0;
		(b[1] => z[28]) = 0;
		(b[2] => z[28]) = 0;
		(b[3] => z[28]) = 0;
		(b[4] => z[28]) = 0;
		(b[5] => z[28]) = 0;
		(b[6] => z[28]) = 0;
		(b[7] => z[28]) = 0;
		(b[8] => z[28]) = 0;
		(b[9] => z[28]) = 0;
		(b[10] => z[28]) = 0;
		(b[11] => z[28]) = 0;
		(b[12] => z[28]) = 0;
		(b[13] => z[28]) = 0;
		(b[14] => z[28]) = 0;
		(b[15] => z[28]) = 0;
		(b[16] => z[28]) = 0;
		(b[17] => z[28]) = 0;
		(a[0] => z[29]) = 0;
		(a[1] => z[29]) = 0;
		(a[2] => z[29]) = 0;
		(a[3] => z[29]) = 0;
		(a[4] => z[29]) = 0;
		(a[5] => z[29]) = 0;
		(a[6] => z[29]) = 0;
		(a[7] => z[29]) = 0;
		(a[8] => z[29]) = 0;
		(a[9] => z[29]) = 0;
		(a[10] => z[29]) = 0;
		(a[11] => z[29]) = 0;
		(a[12] => z[29]) = 0;
		(a[13] => z[29]) = 0;
		(a[14] => z[29]) = 0;
		(a[15] => z[29]) = 0;
		(a[16] => z[29]) = 0;
		(a[17] => z[29]) = 0;
		(a[18] => z[29]) = 0;
		(a[19] => z[29]) = 0;
		(b[0] => z[29]) = 0;
		(b[1] => z[29]) = 0;
		(b[2] => z[29]) = 0;
		(b[3] => z[29]) = 0;
		(b[4] => z[29]) = 0;
		(b[5] => z[29]) = 0;
		(b[6] => z[29]) = 0;
		(b[7] => z[29]) = 0;
		(b[8] => z[29]) = 0;
		(b[9] => z[29]) = 0;
		(b[10] => z[29]) = 0;
		(b[11] => z[29]) = 0;
		(b[12] => z[29]) = 0;
		(b[13] => z[29]) = 0;
		(b[14] => z[29]) = 0;
		(b[15] => z[29]) = 0;
		(b[16] => z[29]) = 0;
		(b[17] => z[29]) = 0;
		(a[0] => z[30]) = 0;
		(a[1] => z[30]) = 0;
		(a[2] => z[30]) = 0;
		(a[3] => z[30]) = 0;
		(a[4] => z[30]) = 0;
		(a[5] => z[30]) = 0;
		(a[6] => z[30]) = 0;
		(a[7] => z[30]) = 0;
		(a[8] => z[30]) = 0;
		(a[9] => z[30]) = 0;
		(a[10] => z[30]) = 0;
		(a[11] => z[30]) = 0;
		(a[12] => z[30]) = 0;
		(a[13] => z[30]) = 0;
		(a[14] => z[30]) = 0;
		(a[15] => z[30]) = 0;
		(a[16] => z[30]) = 0;
		(a[17] => z[30]) = 0;
		(a[18] => z[30]) = 0;
		(a[19] => z[30]) = 0;
		(b[0] => z[30]) = 0;
		(b[1] => z[30]) = 0;
		(b[2] => z[30]) = 0;
		(b[3] => z[30]) = 0;
		(b[4] => z[30]) = 0;
		(b[5] => z[30]) = 0;
		(b[6] => z[30]) = 0;
		(b[7] => z[30]) = 0;
		(b[8] => z[30]) = 0;
		(b[9] => z[30]) = 0;
		(b[10] => z[30]) = 0;
		(b[11] => z[30]) = 0;
		(b[12] => z[30]) = 0;
		(b[13] => z[30]) = 0;
		(b[14] => z[30]) = 0;
		(b[15] => z[30]) = 0;
		(b[16] => z[30]) = 0;
		(b[17] => z[30]) = 0;
		(a[0] => z[31]) = 0;
		(a[1] => z[31]) = 0;
		(a[2] => z[31]) = 0;
		(a[3] => z[31]) = 0;
		(a[4] => z[31]) = 0;
		(a[5] => z[31]) = 0;
		(a[6] => z[31]) = 0;
		(a[7] => z[31]) = 0;
		(a[8] => z[31]) = 0;
		(a[9] => z[31]) = 0;
		(a[10] => z[31]) = 0;
		(a[11] => z[31]) = 0;
		(a[12] => z[31]) = 0;
		(a[13] => z[31]) = 0;
		(a[14] => z[31]) = 0;
		(a[15] => z[31]) = 0;
		(a[16] => z[31]) = 0;
		(a[17] => z[31]) = 0;
		(a[18] => z[31]) = 0;
		(a[19] => z[31]) = 0;
		(b[0] => z[31]) = 0;
		(b[1] => z[31]) = 0;
		(b[2] => z[31]) = 0;
		(b[3] => z[31]) = 0;
		(b[4] => z[31]) = 0;
		(b[5] => z[31]) = 0;
		(b[6] => z[31]) = 0;
		(b[7] => z[31]) = 0;
		(b[8] => z[31]) = 0;
		(b[9] => z[31]) = 0;
		(b[10] => z[31]) = 0;
		(b[11] => z[31]) = 0;
		(b[12] => z[31]) = 0;
		(b[13] => z[31]) = 0;
		(b[14] => z[31]) = 0;
		(b[15] => z[31]) = 0;
		(b[16] => z[31]) = 0;
		(b[17] => z[31]) = 0;
		(a[0] => z[32]) = 0;
		(a[1] => z[32]) = 0;
		(a[2] => z[32]) = 0;
		(a[3] => z[32]) = 0;
		(a[4] => z[32]) = 0;
		(a[5] => z[32]) = 0;
		(a[6] => z[32]) = 0;
		(a[7] => z[32]) = 0;
		(a[8] => z[32]) = 0;
		(a[9] => z[32]) = 0;
		(a[10] => z[32]) = 0;
		(a[11] => z[32]) = 0;
		(a[12] => z[32]) = 0;
		(a[13] => z[32]) = 0;
		(a[14] => z[32]) = 0;
		(a[15] => z[32]) = 0;
		(a[16] => z[32]) = 0;
		(a[17] => z[32]) = 0;
		(a[18] => z[32]) = 0;
		(a[19] => z[32]) = 0;
		(b[0] => z[32]) = 0;
		(b[1] => z[32]) = 0;
		(b[2] => z[32]) = 0;
		(b[3] => z[32]) = 0;
		(b[4] => z[32]) = 0;
		(b[5] => z[32]) = 0;
		(b[6] => z[32]) = 0;
		(b[7] => z[32]) = 0;
		(b[8] => z[32]) = 0;
		(b[9] => z[32]) = 0;
		(b[10] => z[32]) = 0;
		(b[11] => z[32]) = 0;
		(b[12] => z[32]) = 0;
		(b[13] => z[32]) = 0;
		(b[14] => z[32]) = 0;
		(b[15] => z[32]) = 0;
		(b[16] => z[32]) = 0;
		(b[17] => z[32]) = 0;
		(a[0] => z[33]) = 0;
		(a[1] => z[33]) = 0;
		(a[2] => z[33]) = 0;
		(a[3] => z[33]) = 0;
		(a[4] => z[33]) = 0;
		(a[5] => z[33]) = 0;
		(a[6] => z[33]) = 0;
		(a[7] => z[33]) = 0;
		(a[8] => z[33]) = 0;
		(a[9] => z[33]) = 0;
		(a[10] => z[33]) = 0;
		(a[11] => z[33]) = 0;
		(a[12] => z[33]) = 0;
		(a[13] => z[33]) = 0;
		(a[14] => z[33]) = 0;
		(a[15] => z[33]) = 0;
		(a[16] => z[33]) = 0;
		(a[17] => z[33]) = 0;
		(a[18] => z[33]) = 0;
		(a[19] => z[33]) = 0;
		(b[0] => z[33]) = 0;
		(b[1] => z[33]) = 0;
		(b[2] => z[33]) = 0;
		(b[3] => z[33]) = 0;
		(b[4] => z[33]) = 0;
		(b[5] => z[33]) = 0;
		(b[6] => z[33]) = 0;
		(b[7] => z[33]) = 0;
		(b[8] => z[33]) = 0;
		(b[9] => z[33]) = 0;
		(b[10] => z[33]) = 0;
		(b[11] => z[33]) = 0;
		(b[12] => z[33]) = 0;
		(b[13] => z[33]) = 0;
		(b[14] => z[33]) = 0;
		(b[15] => z[33]) = 0;
		(b[16] => z[33]) = 0;
		(b[17] => z[33]) = 0;
		(a[0] => z[34]) = 0;
		(a[1] => z[34]) = 0;
		(a[2] => z[34]) = 0;
		(a[3] => z[34]) = 0;
		(a[4] => z[34]) = 0;
		(a[5] => z[34]) = 0;
		(a[6] => z[34]) = 0;
		(a[7] => z[34]) = 0;
		(a[8] => z[34]) = 0;
		(a[9] => z[34]) = 0;
		(a[10] => z[34]) = 0;
		(a[11] => z[34]) = 0;
		(a[12] => z[34]) = 0;
		(a[13] => z[34]) = 0;
		(a[14] => z[34]) = 0;
		(a[15] => z[34]) = 0;
		(a[16] => z[34]) = 0;
		(a[17] => z[34]) = 0;
		(a[18] => z[34]) = 0;
		(a[19] => z[34]) = 0;
		(b[0] => z[34]) = 0;
		(b[1] => z[34]) = 0;
		(b[2] => z[34]) = 0;
		(b[3] => z[34]) = 0;
		(b[4] => z[34]) = 0;
		(b[5] => z[34]) = 0;
		(b[6] => z[34]) = 0;
		(b[7] => z[34]) = 0;
		(b[8] => z[34]) = 0;
		(b[9] => z[34]) = 0;
		(b[10] => z[34]) = 0;
		(b[11] => z[34]) = 0;
		(b[12] => z[34]) = 0;
		(b[13] => z[34]) = 0;
		(b[14] => z[34]) = 0;
		(b[15] => z[34]) = 0;
		(b[16] => z[34]) = 0;
		(b[17] => z[34]) = 0;
		(a[0] => z[35]) = 0;
		(a[1] => z[35]) = 0;
		(a[2] => z[35]) = 0;
		(a[3] => z[35]) = 0;
		(a[4] => z[35]) = 0;
		(a[5] => z[35]) = 0;
		(a[6] => z[35]) = 0;
		(a[7] => z[35]) = 0;
		(a[8] => z[35]) = 0;
		(a[9] => z[35]) = 0;
		(a[10] => z[35]) = 0;
		(a[11] => z[35]) = 0;
		(a[12] => z[35]) = 0;
		(a[13] => z[35]) = 0;
		(a[14] => z[35]) = 0;
		(a[15] => z[35]) = 0;
		(a[16] => z[35]) = 0;
		(a[17] => z[35]) = 0;
		(a[18] => z[35]) = 0;
		(a[19] => z[35]) = 0;
		(b[0] => z[35]) = 0;
		(b[1] => z[35]) = 0;
		(b[2] => z[35]) = 0;
		(b[3] => z[35]) = 0;
		(b[4] => z[35]) = 0;
		(b[5] => z[35]) = 0;
		(b[6] => z[35]) = 0;
		(b[7] => z[35]) = 0;
		(b[8] => z[35]) = 0;
		(b[9] => z[35]) = 0;
		(b[10] => z[35]) = 0;
		(b[11] => z[35]) = 0;
		(b[12] => z[35]) = 0;
		(b[13] => z[35]) = 0;
		(b[14] => z[35]) = 0;
		(b[15] => z[35]) = 0;
		(b[16] => z[35]) = 0;
		(b[17] => z[35]) = 0;
		(a[0] => z[36]) = 0;
		(a[1] => z[36]) = 0;
		(a[2] => z[36]) = 0;
		(a[3] => z[36]) = 0;
		(a[4] => z[36]) = 0;
		(a[5] => z[36]) = 0;
		(a[6] => z[36]) = 0;
		(a[7] => z[36]) = 0;
		(a[8] => z[36]) = 0;
		(a[9] => z[36]) = 0;
		(a[10] => z[36]) = 0;
		(a[11] => z[36]) = 0;
		(a[12] => z[36]) = 0;
		(a[13] => z[36]) = 0;
		(a[14] => z[36]) = 0;
		(a[15] => z[36]) = 0;
		(a[16] => z[36]) = 0;
		(a[17] => z[36]) = 0;
		(a[18] => z[36]) = 0;
		(a[19] => z[36]) = 0;
		(b[0] => z[36]) = 0;
		(b[1] => z[36]) = 0;
		(b[2] => z[36]) = 0;
		(b[3] => z[36]) = 0;
		(b[4] => z[36]) = 0;
		(b[5] => z[36]) = 0;
		(b[6] => z[36]) = 0;
		(b[7] => z[36]) = 0;
		(b[8] => z[36]) = 0;
		(b[9] => z[36]) = 0;
		(b[10] => z[36]) = 0;
		(b[11] => z[36]) = 0;
		(b[12] => z[36]) = 0;
		(b[13] => z[36]) = 0;
		(b[14] => z[36]) = 0;
		(b[15] => z[36]) = 0;
		(b[16] => z[36]) = 0;
		(b[17] => z[36]) = 0;
		(a[0] => z[37]) = 0;
		(a[1] => z[37]) = 0;
		(a[2] => z[37]) = 0;
		(a[3] => z[37]) = 0;
		(a[4] => z[37]) = 0;
		(a[5] => z[37]) = 0;
		(a[6] => z[37]) = 0;
		(a[7] => z[37]) = 0;
		(a[8] => z[37]) = 0;
		(a[9] => z[37]) = 0;
		(a[10] => z[37]) = 0;
		(a[11] => z[37]) = 0;
		(a[12] => z[37]) = 0;
		(a[13] => z[37]) = 0;
		(a[14] => z[37]) = 0;
		(a[15] => z[37]) = 0;
		(a[16] => z[37]) = 0;
		(a[17] => z[37]) = 0;
		(a[18] => z[37]) = 0;
		(a[19] => z[37]) = 0;
		(b[0] => z[37]) = 0;
		(b[1] => z[37]) = 0;
		(b[2] => z[37]) = 0;
		(b[3] => z[37]) = 0;
		(b[4] => z[37]) = 0;
		(b[5] => z[37]) = 0;
		(b[6] => z[37]) = 0;
		(b[7] => z[37]) = 0;
		(b[8] => z[37]) = 0;
		(b[9] => z[37]) = 0;
		(b[10] => z[37]) = 0;
		(b[11] => z[37]) = 0;
		(b[12] => z[37]) = 0;
		(b[13] => z[37]) = 0;
		(b[14] => z[37]) = 0;
		(b[15] => z[37]) = 0;
		(b[16] => z[37]) = 0;
		(b[17] => z[37]) = 0;
	endspecify
`endif

endmodule

module QL_DSP2_MULT_REGIN ( // TODO: Name subject to change
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire       clk,
	input  wire       reset,

	input  wire [2:0] feedback,
	input  wire       unsigned_a,
	input  wire       unsigned_b,

	input  wire       f_mode,
	input  wire [2:0] output_select,
	input  wire       register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(1'b0),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // unregistered output: a * b (0)
		.saturate_enable(1'b0),
		.shift_right(6'b0),
		.round(1'b0),
		.subtract(1'b0),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULT_REGOUT ( // TODO: Name subject to change
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire       clk,
	input  wire       reset,

	input  wire [2:0] feedback,
	input  wire       unsigned_a,
	input  wire       unsigned_b,
	input  wire       f_mode,
	input  wire [2:0] output_select,
	input  wire       register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(1'b0),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: a * b (4)
		.saturate_enable(1'b0),
		.shift_right(6'b0),
		.round(1'b0),
		.subtract(1'b0),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULT_REGIN_REGOUT ( // TODO: Name subject to change
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire       clk,
	input  wire       reset,

	input  wire [2:0] feedback,
	input  wire       unsigned_a,
	input  wire       unsigned_b,
	input  wire       f_mode,
	input  wire [2:0] output_select,
	input  wire       register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(1'b0),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: a * b (4)
		.saturate_enable(1'b0),
		.shift_right(6'b0),
		.round(1'b0),
		.subtract(1'b0),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTADD (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire [ 5:0] acc_fir,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.dly_b(),
		.z(z),

		.f_mode(f_mode),

		.feedback(feedback),
		.acc_fir(acc_fir),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		//.clk(1'b0),
		.reset(reset),

		.output_select(output_select),      // unregistered output: ACCin (2, 3)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(a[0] => z[0]) = 0;
		(a[1] => z[0]) = 0;
		(a[2] => z[0]) = 0;
		(a[3] => z[0]) = 0;
		(a[4] => z[0]) = 0;
		(a[5] => z[0]) = 0;
		(a[6] => z[0]) = 0;
		(a[7] => z[0]) = 0;
		(a[8] => z[0]) = 0;
		(a[9] => z[0]) = 0;
		(a[10] => z[0]) = 0;
		(a[11] => z[0]) = 0;
		(a[12] => z[0]) = 0;
		(a[13] => z[0]) = 0;
		(a[14] => z[0]) = 0;
		(a[15] => z[0]) = 0;
		(a[16] => z[0]) = 0;
		(a[17] => z[0]) = 0;
		(a[18] => z[0]) = 0;
		(a[19] => z[0]) = 0;
		(b[0] => z[0]) = 0;
		(b[1] => z[0]) = 0;
		(b[2] => z[0]) = 0;
		(b[3] => z[0]) = 0;
		(b[4] => z[0]) = 0;
		(b[5] => z[0]) = 0;
		(b[6] => z[0]) = 0;
		(b[7] => z[0]) = 0;
		(b[8] => z[0]) = 0;
		(b[9] => z[0]) = 0;
		(b[10] => z[0]) = 0;
		(b[11] => z[0]) = 0;
		(b[12] => z[0]) = 0;
		(b[13] => z[0]) = 0;
		(b[14] => z[0]) = 0;
		(b[15] => z[0]) = 0;
		(b[16] => z[0]) = 0;
		(b[17] => z[0]) = 0;
		(a[0] => z[1]) = 0;
		(a[1] => z[1]) = 0;
		(a[2] => z[1]) = 0;
		(a[3] => z[1]) = 0;
		(a[4] => z[1]) = 0;
		(a[5] => z[1]) = 0;
		(a[6] => z[1]) = 0;
		(a[7] => z[1]) = 0;
		(a[8] => z[1]) = 0;
		(a[9] => z[1]) = 0;
		(a[10] => z[1]) = 0;
		(a[11] => z[1]) = 0;
		(a[12] => z[1]) = 0;
		(a[13] => z[1]) = 0;
		(a[14] => z[1]) = 0;
		(a[15] => z[1]) = 0;
		(a[16] => z[1]) = 0;
		(a[17] => z[1]) = 0;
		(a[18] => z[1]) = 0;
		(a[19] => z[1]) = 0;
		(b[0] => z[1]) = 0;
		(b[1] => z[1]) = 0;
		(b[2] => z[1]) = 0;
		(b[3] => z[1]) = 0;
		(b[4] => z[1]) = 0;
		(b[5] => z[1]) = 0;
		(b[6] => z[1]) = 0;
		(b[7] => z[1]) = 0;
		(b[8] => z[1]) = 0;
		(b[9] => z[1]) = 0;
		(b[10] => z[1]) = 0;
		(b[11] => z[1]) = 0;
		(b[12] => z[1]) = 0;
		(b[13] => z[1]) = 0;
		(b[14] => z[1]) = 0;
		(b[15] => z[1]) = 0;
		(b[16] => z[1]) = 0;
		(b[17] => z[1]) = 0;
		(a[0] => z[2]) = 0;
		(a[1] => z[2]) = 0;
		(a[2] => z[2]) = 0;
		(a[3] => z[2]) = 0;
		(a[4] => z[2]) = 0;
		(a[5] => z[2]) = 0;
		(a[6] => z[2]) = 0;
		(a[7] => z[2]) = 0;
		(a[8] => z[2]) = 0;
		(a[9] => z[2]) = 0;
		(a[10] => z[2]) = 0;
		(a[11] => z[2]) = 0;
		(a[12] => z[2]) = 0;
		(a[13] => z[2]) = 0;
		(a[14] => z[2]) = 0;
		(a[15] => z[2]) = 0;
		(a[16] => z[2]) = 0;
		(a[17] => z[2]) = 0;
		(a[18] => z[2]) = 0;
		(a[19] => z[2]) = 0;
		(b[0] => z[2]) = 0;
		(b[1] => z[2]) = 0;
		(b[2] => z[2]) = 0;
		(b[3] => z[2]) = 0;
		(b[4] => z[2]) = 0;
		(b[5] => z[2]) = 0;
		(b[6] => z[2]) = 0;
		(b[7] => z[2]) = 0;
		(b[8] => z[2]) = 0;
		(b[9] => z[2]) = 0;
		(b[10] => z[2]) = 0;
		(b[11] => z[2]) = 0;
		(b[12] => z[2]) = 0;
		(b[13] => z[2]) = 0;
		(b[14] => z[2]) = 0;
		(b[15] => z[2]) = 0;
		(b[16] => z[2]) = 0;
		(b[17] => z[2]) = 0;
		(a[0] => z[3]) = 0;
		(a[1] => z[3]) = 0;
		(a[2] => z[3]) = 0;
		(a[3] => z[3]) = 0;
		(a[4] => z[3]) = 0;
		(a[5] => z[3]) = 0;
		(a[6] => z[3]) = 0;
		(a[7] => z[3]) = 0;
		(a[8] => z[3]) = 0;
		(a[9] => z[3]) = 0;
		(a[10] => z[3]) = 0;
		(a[11] => z[3]) = 0;
		(a[12] => z[3]) = 0;
		(a[13] => z[3]) = 0;
		(a[14] => z[3]) = 0;
		(a[15] => z[3]) = 0;
		(a[16] => z[3]) = 0;
		(a[17] => z[3]) = 0;
		(a[18] => z[3]) = 0;
		(a[19] => z[3]) = 0;
		(b[0] => z[3]) = 0;
		(b[1] => z[3]) = 0;
		(b[2] => z[3]) = 0;
		(b[3] => z[3]) = 0;
		(b[4] => z[3]) = 0;
		(b[5] => z[3]) = 0;
		(b[6] => z[3]) = 0;
		(b[7] => z[3]) = 0;
		(b[8] => z[3]) = 0;
		(b[9] => z[3]) = 0;
		(b[10] => z[3]) = 0;
		(b[11] => z[3]) = 0;
		(b[12] => z[3]) = 0;
		(b[13] => z[3]) = 0;
		(b[14] => z[3]) = 0;
		(b[15] => z[3]) = 0;
		(b[16] => z[3]) = 0;
		(b[17] => z[3]) = 0;
		(a[0] => z[4]) = 0;
		(a[1] => z[4]) = 0;
		(a[2] => z[4]) = 0;
		(a[3] => z[4]) = 0;
		(a[4] => z[4]) = 0;
		(a[5] => z[4]) = 0;
		(a[6] => z[4]) = 0;
		(a[7] => z[4]) = 0;
		(a[8] => z[4]) = 0;
		(a[9] => z[4]) = 0;
		(a[10] => z[4]) = 0;
		(a[11] => z[4]) = 0;
		(a[12] => z[4]) = 0;
		(a[13] => z[4]) = 0;
		(a[14] => z[4]) = 0;
		(a[15] => z[4]) = 0;
		(a[16] => z[4]) = 0;
		(a[17] => z[4]) = 0;
		(a[18] => z[4]) = 0;
		(a[19] => z[4]) = 0;
		(b[0] => z[4]) = 0;
		(b[1] => z[4]) = 0;
		(b[2] => z[4]) = 0;
		(b[3] => z[4]) = 0;
		(b[4] => z[4]) = 0;
		(b[5] => z[4]) = 0;
		(b[6] => z[4]) = 0;
		(b[7] => z[4]) = 0;
		(b[8] => z[4]) = 0;
		(b[9] => z[4]) = 0;
		(b[10] => z[4]) = 0;
		(b[11] => z[4]) = 0;
		(b[12] => z[4]) = 0;
		(b[13] => z[4]) = 0;
		(b[14] => z[4]) = 0;
		(b[15] => z[4]) = 0;
		(b[16] => z[4]) = 0;
		(b[17] => z[4]) = 0;
		(a[0] => z[5]) = 0;
		(a[1] => z[5]) = 0;
		(a[2] => z[5]) = 0;
		(a[3] => z[5]) = 0;
		(a[4] => z[5]) = 0;
		(a[5] => z[5]) = 0;
		(a[6] => z[5]) = 0;
		(a[7] => z[5]) = 0;
		(a[8] => z[5]) = 0;
		(a[9] => z[5]) = 0;
		(a[10] => z[5]) = 0;
		(a[11] => z[5]) = 0;
		(a[12] => z[5]) = 0;
		(a[13] => z[5]) = 0;
		(a[14] => z[5]) = 0;
		(a[15] => z[5]) = 0;
		(a[16] => z[5]) = 0;
		(a[17] => z[5]) = 0;
		(a[18] => z[5]) = 0;
		(a[19] => z[5]) = 0;
		(b[0] => z[5]) = 0;
		(b[1] => z[5]) = 0;
		(b[2] => z[5]) = 0;
		(b[3] => z[5]) = 0;
		(b[4] => z[5]) = 0;
		(b[5] => z[5]) = 0;
		(b[6] => z[5]) = 0;
		(b[7] => z[5]) = 0;
		(b[8] => z[5]) = 0;
		(b[9] => z[5]) = 0;
		(b[10] => z[5]) = 0;
		(b[11] => z[5]) = 0;
		(b[12] => z[5]) = 0;
		(b[13] => z[5]) = 0;
		(b[14] => z[5]) = 0;
		(b[15] => z[5]) = 0;
		(b[16] => z[5]) = 0;
		(b[17] => z[5]) = 0;
		(a[0] => z[6]) = 0;
		(a[1] => z[6]) = 0;
		(a[2] => z[6]) = 0;
		(a[3] => z[6]) = 0;
		(a[4] => z[6]) = 0;
		(a[5] => z[6]) = 0;
		(a[6] => z[6]) = 0;
		(a[7] => z[6]) = 0;
		(a[8] => z[6]) = 0;
		(a[9] => z[6]) = 0;
		(a[10] => z[6]) = 0;
		(a[11] => z[6]) = 0;
		(a[12] => z[6]) = 0;
		(a[13] => z[6]) = 0;
		(a[14] => z[6]) = 0;
		(a[15] => z[6]) = 0;
		(a[16] => z[6]) = 0;
		(a[17] => z[6]) = 0;
		(a[18] => z[6]) = 0;
		(a[19] => z[6]) = 0;
		(b[0] => z[6]) = 0;
		(b[1] => z[6]) = 0;
		(b[2] => z[6]) = 0;
		(b[3] => z[6]) = 0;
		(b[4] => z[6]) = 0;
		(b[5] => z[6]) = 0;
		(b[6] => z[6]) = 0;
		(b[7] => z[6]) = 0;
		(b[8] => z[6]) = 0;
		(b[9] => z[6]) = 0;
		(b[10] => z[6]) = 0;
		(b[11] => z[6]) = 0;
		(b[12] => z[6]) = 0;
		(b[13] => z[6]) = 0;
		(b[14] => z[6]) = 0;
		(b[15] => z[6]) = 0;
		(b[16] => z[6]) = 0;
		(b[17] => z[6]) = 0;
		(a[0] => z[7]) = 0;
		(a[1] => z[7]) = 0;
		(a[2] => z[7]) = 0;
		(a[3] => z[7]) = 0;
		(a[4] => z[7]) = 0;
		(a[5] => z[7]) = 0;
		(a[6] => z[7]) = 0;
		(a[7] => z[7]) = 0;
		(a[8] => z[7]) = 0;
		(a[9] => z[7]) = 0;
		(a[10] => z[7]) = 0;
		(a[11] => z[7]) = 0;
		(a[12] => z[7]) = 0;
		(a[13] => z[7]) = 0;
		(a[14] => z[7]) = 0;
		(a[15] => z[7]) = 0;
		(a[16] => z[7]) = 0;
		(a[17] => z[7]) = 0;
		(a[18] => z[7]) = 0;
		(a[19] => z[7]) = 0;
		(b[0] => z[7]) = 0;
		(b[1] => z[7]) = 0;
		(b[2] => z[7]) = 0;
		(b[3] => z[7]) = 0;
		(b[4] => z[7]) = 0;
		(b[5] => z[7]) = 0;
		(b[6] => z[7]) = 0;
		(b[7] => z[7]) = 0;
		(b[8] => z[7]) = 0;
		(b[9] => z[7]) = 0;
		(b[10] => z[7]) = 0;
		(b[11] => z[7]) = 0;
		(b[12] => z[7]) = 0;
		(b[13] => z[7]) = 0;
		(b[14] => z[7]) = 0;
		(b[15] => z[7]) = 0;
		(b[16] => z[7]) = 0;
		(b[17] => z[7]) = 0;
		(a[0] => z[8]) = 0;
		(a[1] => z[8]) = 0;
		(a[2] => z[8]) = 0;
		(a[3] => z[8]) = 0;
		(a[4] => z[8]) = 0;
		(a[5] => z[8]) = 0;
		(a[6] => z[8]) = 0;
		(a[7] => z[8]) = 0;
		(a[8] => z[8]) = 0;
		(a[9] => z[8]) = 0;
		(a[10] => z[8]) = 0;
		(a[11] => z[8]) = 0;
		(a[12] => z[8]) = 0;
		(a[13] => z[8]) = 0;
		(a[14] => z[8]) = 0;
		(a[15] => z[8]) = 0;
		(a[16] => z[8]) = 0;
		(a[17] => z[8]) = 0;
		(a[18] => z[8]) = 0;
		(a[19] => z[8]) = 0;
		(b[0] => z[8]) = 0;
		(b[1] => z[8]) = 0;
		(b[2] => z[8]) = 0;
		(b[3] => z[8]) = 0;
		(b[4] => z[8]) = 0;
		(b[5] => z[8]) = 0;
		(b[6] => z[8]) = 0;
		(b[7] => z[8]) = 0;
		(b[8] => z[8]) = 0;
		(b[9] => z[8]) = 0;
		(b[10] => z[8]) = 0;
		(b[11] => z[8]) = 0;
		(b[12] => z[8]) = 0;
		(b[13] => z[8]) = 0;
		(b[14] => z[8]) = 0;
		(b[15] => z[8]) = 0;
		(b[16] => z[8]) = 0;
		(b[17] => z[8]) = 0;
		(a[0] => z[9]) = 0;
		(a[1] => z[9]) = 0;
		(a[2] => z[9]) = 0;
		(a[3] => z[9]) = 0;
		(a[4] => z[9]) = 0;
		(a[5] => z[9]) = 0;
		(a[6] => z[9]) = 0;
		(a[7] => z[9]) = 0;
		(a[8] => z[9]) = 0;
		(a[9] => z[9]) = 0;
		(a[10] => z[9]) = 0;
		(a[11] => z[9]) = 0;
		(a[12] => z[9]) = 0;
		(a[13] => z[9]) = 0;
		(a[14] => z[9]) = 0;
		(a[15] => z[9]) = 0;
		(a[16] => z[9]) = 0;
		(a[17] => z[9]) = 0;
		(a[18] => z[9]) = 0;
		(a[19] => z[9]) = 0;
		(b[0] => z[9]) = 0;
		(b[1] => z[9]) = 0;
		(b[2] => z[9]) = 0;
		(b[3] => z[9]) = 0;
		(b[4] => z[9]) = 0;
		(b[5] => z[9]) = 0;
		(b[6] => z[9]) = 0;
		(b[7] => z[9]) = 0;
		(b[8] => z[9]) = 0;
		(b[9] => z[9]) = 0;
		(b[10] => z[9]) = 0;
		(b[11] => z[9]) = 0;
		(b[12] => z[9]) = 0;
		(b[13] => z[9]) = 0;
		(b[14] => z[9]) = 0;
		(b[15] => z[9]) = 0;
		(b[16] => z[9]) = 0;
		(b[17] => z[9]) = 0;
		(a[0] => z[10]) = 0;
		(a[1] => z[10]) = 0;
		(a[2] => z[10]) = 0;
		(a[3] => z[10]) = 0;
		(a[4] => z[10]) = 0;
		(a[5] => z[10]) = 0;
		(a[6] => z[10]) = 0;
		(a[7] => z[10]) = 0;
		(a[8] => z[10]) = 0;
		(a[9] => z[10]) = 0;
		(a[10] => z[10]) = 0;
		(a[11] => z[10]) = 0;
		(a[12] => z[10]) = 0;
		(a[13] => z[10]) = 0;
		(a[14] => z[10]) = 0;
		(a[15] => z[10]) = 0;
		(a[16] => z[10]) = 0;
		(a[17] => z[10]) = 0;
		(a[18] => z[10]) = 0;
		(a[19] => z[10]) = 0;
		(b[0] => z[10]) = 0;
		(b[1] => z[10]) = 0;
		(b[2] => z[10]) = 0;
		(b[3] => z[10]) = 0;
		(b[4] => z[10]) = 0;
		(b[5] => z[10]) = 0;
		(b[6] => z[10]) = 0;
		(b[7] => z[10]) = 0;
		(b[8] => z[10]) = 0;
		(b[9] => z[10]) = 0;
		(b[10] => z[10]) = 0;
		(b[11] => z[10]) = 0;
		(b[12] => z[10]) = 0;
		(b[13] => z[10]) = 0;
		(b[14] => z[10]) = 0;
		(b[15] => z[10]) = 0;
		(b[16] => z[10]) = 0;
		(b[17] => z[10]) = 0;
		(a[0] => z[11]) = 0;
		(a[1] => z[11]) = 0;
		(a[2] => z[11]) = 0;
		(a[3] => z[11]) = 0;
		(a[4] => z[11]) = 0;
		(a[5] => z[11]) = 0;
		(a[6] => z[11]) = 0;
		(a[7] => z[11]) = 0;
		(a[8] => z[11]) = 0;
		(a[9] => z[11]) = 0;
		(a[10] => z[11]) = 0;
		(a[11] => z[11]) = 0;
		(a[12] => z[11]) = 0;
		(a[13] => z[11]) = 0;
		(a[14] => z[11]) = 0;
		(a[15] => z[11]) = 0;
		(a[16] => z[11]) = 0;
		(a[17] => z[11]) = 0;
		(a[18] => z[11]) = 0;
		(a[19] => z[11]) = 0;
		(b[0] => z[11]) = 0;
		(b[1] => z[11]) = 0;
		(b[2] => z[11]) = 0;
		(b[3] => z[11]) = 0;
		(b[4] => z[11]) = 0;
		(b[5] => z[11]) = 0;
		(b[6] => z[11]) = 0;
		(b[7] => z[11]) = 0;
		(b[8] => z[11]) = 0;
		(b[9] => z[11]) = 0;
		(b[10] => z[11]) = 0;
		(b[11] => z[11]) = 0;
		(b[12] => z[11]) = 0;
		(b[13] => z[11]) = 0;
		(b[14] => z[11]) = 0;
		(b[15] => z[11]) = 0;
		(b[16] => z[11]) = 0;
		(b[17] => z[11]) = 0;
		(a[0] => z[12]) = 0;
		(a[1] => z[12]) = 0;
		(a[2] => z[12]) = 0;
		(a[3] => z[12]) = 0;
		(a[4] => z[12]) = 0;
		(a[5] => z[12]) = 0;
		(a[6] => z[12]) = 0;
		(a[7] => z[12]) = 0;
		(a[8] => z[12]) = 0;
		(a[9] => z[12]) = 0;
		(a[10] => z[12]) = 0;
		(a[11] => z[12]) = 0;
		(a[12] => z[12]) = 0;
		(a[13] => z[12]) = 0;
		(a[14] => z[12]) = 0;
		(a[15] => z[12]) = 0;
		(a[16] => z[12]) = 0;
		(a[17] => z[12]) = 0;
		(a[18] => z[12]) = 0;
		(a[19] => z[12]) = 0;
		(b[0] => z[12]) = 0;
		(b[1] => z[12]) = 0;
		(b[2] => z[12]) = 0;
		(b[3] => z[12]) = 0;
		(b[4] => z[12]) = 0;
		(b[5] => z[12]) = 0;
		(b[6] => z[12]) = 0;
		(b[7] => z[12]) = 0;
		(b[8] => z[12]) = 0;
		(b[9] => z[12]) = 0;
		(b[10] => z[12]) = 0;
		(b[11] => z[12]) = 0;
		(b[12] => z[12]) = 0;
		(b[13] => z[12]) = 0;
		(b[14] => z[12]) = 0;
		(b[15] => z[12]) = 0;
		(b[16] => z[12]) = 0;
		(b[17] => z[12]) = 0;
		(a[0] => z[13]) = 0;
		(a[1] => z[13]) = 0;
		(a[2] => z[13]) = 0;
		(a[3] => z[13]) = 0;
		(a[4] => z[13]) = 0;
		(a[5] => z[13]) = 0;
		(a[6] => z[13]) = 0;
		(a[7] => z[13]) = 0;
		(a[8] => z[13]) = 0;
		(a[9] => z[13]) = 0;
		(a[10] => z[13]) = 0;
		(a[11] => z[13]) = 0;
		(a[12] => z[13]) = 0;
		(a[13] => z[13]) = 0;
		(a[14] => z[13]) = 0;
		(a[15] => z[13]) = 0;
		(a[16] => z[13]) = 0;
		(a[17] => z[13]) = 0;
		(a[18] => z[13]) = 0;
		(a[19] => z[13]) = 0;
		(b[0] => z[13]) = 0;
		(b[1] => z[13]) = 0;
		(b[2] => z[13]) = 0;
		(b[3] => z[13]) = 0;
		(b[4] => z[13]) = 0;
		(b[5] => z[13]) = 0;
		(b[6] => z[13]) = 0;
		(b[7] => z[13]) = 0;
		(b[8] => z[13]) = 0;
		(b[9] => z[13]) = 0;
		(b[10] => z[13]) = 0;
		(b[11] => z[13]) = 0;
		(b[12] => z[13]) = 0;
		(b[13] => z[13]) = 0;
		(b[14] => z[13]) = 0;
		(b[15] => z[13]) = 0;
		(b[16] => z[13]) = 0;
		(b[17] => z[13]) = 0;
		(a[0] => z[14]) = 0;
		(a[1] => z[14]) = 0;
		(a[2] => z[14]) = 0;
		(a[3] => z[14]) = 0;
		(a[4] => z[14]) = 0;
		(a[5] => z[14]) = 0;
		(a[6] => z[14]) = 0;
		(a[7] => z[14]) = 0;
		(a[8] => z[14]) = 0;
		(a[9] => z[14]) = 0;
		(a[10] => z[14]) = 0;
		(a[11] => z[14]) = 0;
		(a[12] => z[14]) = 0;
		(a[13] => z[14]) = 0;
		(a[14] => z[14]) = 0;
		(a[15] => z[14]) = 0;
		(a[16] => z[14]) = 0;
		(a[17] => z[14]) = 0;
		(a[18] => z[14]) = 0;
		(a[19] => z[14]) = 0;
		(b[0] => z[14]) = 0;
		(b[1] => z[14]) = 0;
		(b[2] => z[14]) = 0;
		(b[3] => z[14]) = 0;
		(b[4] => z[14]) = 0;
		(b[5] => z[14]) = 0;
		(b[6] => z[14]) = 0;
		(b[7] => z[14]) = 0;
		(b[8] => z[14]) = 0;
		(b[9] => z[14]) = 0;
		(b[10] => z[14]) = 0;
		(b[11] => z[14]) = 0;
		(b[12] => z[14]) = 0;
		(b[13] => z[14]) = 0;
		(b[14] => z[14]) = 0;
		(b[15] => z[14]) = 0;
		(b[16] => z[14]) = 0;
		(b[17] => z[14]) = 0;
		(a[0] => z[15]) = 0;
		(a[1] => z[15]) = 0;
		(a[2] => z[15]) = 0;
		(a[3] => z[15]) = 0;
		(a[4] => z[15]) = 0;
		(a[5] => z[15]) = 0;
		(a[6] => z[15]) = 0;
		(a[7] => z[15]) = 0;
		(a[8] => z[15]) = 0;
		(a[9] => z[15]) = 0;
		(a[10] => z[15]) = 0;
		(a[11] => z[15]) = 0;
		(a[12] => z[15]) = 0;
		(a[13] => z[15]) = 0;
		(a[14] => z[15]) = 0;
		(a[15] => z[15]) = 0;
		(a[16] => z[15]) = 0;
		(a[17] => z[15]) = 0;
		(a[18] => z[15]) = 0;
		(a[19] => z[15]) = 0;
		(b[0] => z[15]) = 0;
		(b[1] => z[15]) = 0;
		(b[2] => z[15]) = 0;
		(b[3] => z[15]) = 0;
		(b[4] => z[15]) = 0;
		(b[5] => z[15]) = 0;
		(b[6] => z[15]) = 0;
		(b[7] => z[15]) = 0;
		(b[8] => z[15]) = 0;
		(b[9] => z[15]) = 0;
		(b[10] => z[15]) = 0;
		(b[11] => z[15]) = 0;
		(b[12] => z[15]) = 0;
		(b[13] => z[15]) = 0;
		(b[14] => z[15]) = 0;
		(b[15] => z[15]) = 0;
		(b[16] => z[15]) = 0;
		(b[17] => z[15]) = 0;
		(a[0] => z[16]) = 0;
		(a[1] => z[16]) = 0;
		(a[2] => z[16]) = 0;
		(a[3] => z[16]) = 0;
		(a[4] => z[16]) = 0;
		(a[5] => z[16]) = 0;
		(a[6] => z[16]) = 0;
		(a[7] => z[16]) = 0;
		(a[8] => z[16]) = 0;
		(a[9] => z[16]) = 0;
		(a[10] => z[16]) = 0;
		(a[11] => z[16]) = 0;
		(a[12] => z[16]) = 0;
		(a[13] => z[16]) = 0;
		(a[14] => z[16]) = 0;
		(a[15] => z[16]) = 0;
		(a[16] => z[16]) = 0;
		(a[17] => z[16]) = 0;
		(a[18] => z[16]) = 0;
		(a[19] => z[16]) = 0;
		(b[0] => z[16]) = 0;
		(b[1] => z[16]) = 0;
		(b[2] => z[16]) = 0;
		(b[3] => z[16]) = 0;
		(b[4] => z[16]) = 0;
		(b[5] => z[16]) = 0;
		(b[6] => z[16]) = 0;
		(b[7] => z[16]) = 0;
		(b[8] => z[16]) = 0;
		(b[9] => z[16]) = 0;
		(b[10] => z[16]) = 0;
		(b[11] => z[16]) = 0;
		(b[12] => z[16]) = 0;
		(b[13] => z[16]) = 0;
		(b[14] => z[16]) = 0;
		(b[15] => z[16]) = 0;
		(b[16] => z[16]) = 0;
		(b[17] => z[16]) = 0;
		(a[0] => z[17]) = 0;
		(a[1] => z[17]) = 0;
		(a[2] => z[17]) = 0;
		(a[3] => z[17]) = 0;
		(a[4] => z[17]) = 0;
		(a[5] => z[17]) = 0;
		(a[6] => z[17]) = 0;
		(a[7] => z[17]) = 0;
		(a[8] => z[17]) = 0;
		(a[9] => z[17]) = 0;
		(a[10] => z[17]) = 0;
		(a[11] => z[17]) = 0;
		(a[12] => z[17]) = 0;
		(a[13] => z[17]) = 0;
		(a[14] => z[17]) = 0;
		(a[15] => z[17]) = 0;
		(a[16] => z[17]) = 0;
		(a[17] => z[17]) = 0;
		(a[18] => z[17]) = 0;
		(a[19] => z[17]) = 0;
		(b[0] => z[17]) = 0;
		(b[1] => z[17]) = 0;
		(b[2] => z[17]) = 0;
		(b[3] => z[17]) = 0;
		(b[4] => z[17]) = 0;
		(b[5] => z[17]) = 0;
		(b[6] => z[17]) = 0;
		(b[7] => z[17]) = 0;
		(b[8] => z[17]) = 0;
		(b[9] => z[17]) = 0;
		(b[10] => z[17]) = 0;
		(b[11] => z[17]) = 0;
		(b[12] => z[17]) = 0;
		(b[13] => z[17]) = 0;
		(b[14] => z[17]) = 0;
		(b[15] => z[17]) = 0;
		(b[16] => z[17]) = 0;
		(b[17] => z[17]) = 0;
		(a[0] => z[18]) = 0;
		(a[1] => z[18]) = 0;
		(a[2] => z[18]) = 0;
		(a[3] => z[18]) = 0;
		(a[4] => z[18]) = 0;
		(a[5] => z[18]) = 0;
		(a[6] => z[18]) = 0;
		(a[7] => z[18]) = 0;
		(a[8] => z[18]) = 0;
		(a[9] => z[18]) = 0;
		(a[10] => z[18]) = 0;
		(a[11] => z[18]) = 0;
		(a[12] => z[18]) = 0;
		(a[13] => z[18]) = 0;
		(a[14] => z[18]) = 0;
		(a[15] => z[18]) = 0;
		(a[16] => z[18]) = 0;
		(a[17] => z[18]) = 0;
		(a[18] => z[18]) = 0;
		(a[19] => z[18]) = 0;
		(b[0] => z[18]) = 0;
		(b[1] => z[18]) = 0;
		(b[2] => z[18]) = 0;
		(b[3] => z[18]) = 0;
		(b[4] => z[18]) = 0;
		(b[5] => z[18]) = 0;
		(b[6] => z[18]) = 0;
		(b[7] => z[18]) = 0;
		(b[8] => z[18]) = 0;
		(b[9] => z[18]) = 0;
		(b[10] => z[18]) = 0;
		(b[11] => z[18]) = 0;
		(b[12] => z[18]) = 0;
		(b[13] => z[18]) = 0;
		(b[14] => z[18]) = 0;
		(b[15] => z[18]) = 0;
		(b[16] => z[18]) = 0;
		(b[17] => z[18]) = 0;
		(a[0] => z[19]) = 0;
		(a[1] => z[19]) = 0;
		(a[2] => z[19]) = 0;
		(a[3] => z[19]) = 0;
		(a[4] => z[19]) = 0;
		(a[5] => z[19]) = 0;
		(a[6] => z[19]) = 0;
		(a[7] => z[19]) = 0;
		(a[8] => z[19]) = 0;
		(a[9] => z[19]) = 0;
		(a[10] => z[19]) = 0;
		(a[11] => z[19]) = 0;
		(a[12] => z[19]) = 0;
		(a[13] => z[19]) = 0;
		(a[14] => z[19]) = 0;
		(a[15] => z[19]) = 0;
		(a[16] => z[19]) = 0;
		(a[17] => z[19]) = 0;
		(a[18] => z[19]) = 0;
		(a[19] => z[19]) = 0;
		(b[0] => z[19]) = 0;
		(b[1] => z[19]) = 0;
		(b[2] => z[19]) = 0;
		(b[3] => z[19]) = 0;
		(b[4] => z[19]) = 0;
		(b[5] => z[19]) = 0;
		(b[6] => z[19]) = 0;
		(b[7] => z[19]) = 0;
		(b[8] => z[19]) = 0;
		(b[9] => z[19]) = 0;
		(b[10] => z[19]) = 0;
		(b[11] => z[19]) = 0;
		(b[12] => z[19]) = 0;
		(b[13] => z[19]) = 0;
		(b[14] => z[19]) = 0;
		(b[15] => z[19]) = 0;
		(b[16] => z[19]) = 0;
		(b[17] => z[19]) = 0;
		(a[0] => z[20]) = 0;
		(a[1] => z[20]) = 0;
		(a[2] => z[20]) = 0;
		(a[3] => z[20]) = 0;
		(a[4] => z[20]) = 0;
		(a[5] => z[20]) = 0;
		(a[6] => z[20]) = 0;
		(a[7] => z[20]) = 0;
		(a[8] => z[20]) = 0;
		(a[9] => z[20]) = 0;
		(a[10] => z[20]) = 0;
		(a[11] => z[20]) = 0;
		(a[12] => z[20]) = 0;
		(a[13] => z[20]) = 0;
		(a[14] => z[20]) = 0;
		(a[15] => z[20]) = 0;
		(a[16] => z[20]) = 0;
		(a[17] => z[20]) = 0;
		(a[18] => z[20]) = 0;
		(a[19] => z[20]) = 0;
		(b[0] => z[20]) = 0;
		(b[1] => z[20]) = 0;
		(b[2] => z[20]) = 0;
		(b[3] => z[20]) = 0;
		(b[4] => z[20]) = 0;
		(b[5] => z[20]) = 0;
		(b[6] => z[20]) = 0;
		(b[7] => z[20]) = 0;
		(b[8] => z[20]) = 0;
		(b[9] => z[20]) = 0;
		(b[10] => z[20]) = 0;
		(b[11] => z[20]) = 0;
		(b[12] => z[20]) = 0;
		(b[13] => z[20]) = 0;
		(b[14] => z[20]) = 0;
		(b[15] => z[20]) = 0;
		(b[16] => z[20]) = 0;
		(b[17] => z[20]) = 0;
		(a[0] => z[21]) = 0;
		(a[1] => z[21]) = 0;
		(a[2] => z[21]) = 0;
		(a[3] => z[21]) = 0;
		(a[4] => z[21]) = 0;
		(a[5] => z[21]) = 0;
		(a[6] => z[21]) = 0;
		(a[7] => z[21]) = 0;
		(a[8] => z[21]) = 0;
		(a[9] => z[21]) = 0;
		(a[10] => z[21]) = 0;
		(a[11] => z[21]) = 0;
		(a[12] => z[21]) = 0;
		(a[13] => z[21]) = 0;
		(a[14] => z[21]) = 0;
		(a[15] => z[21]) = 0;
		(a[16] => z[21]) = 0;
		(a[17] => z[21]) = 0;
		(a[18] => z[21]) = 0;
		(a[19] => z[21]) = 0;
		(b[0] => z[21]) = 0;
		(b[1] => z[21]) = 0;
		(b[2] => z[21]) = 0;
		(b[3] => z[21]) = 0;
		(b[4] => z[21]) = 0;
		(b[5] => z[21]) = 0;
		(b[6] => z[21]) = 0;
		(b[7] => z[21]) = 0;
		(b[8] => z[21]) = 0;
		(b[9] => z[21]) = 0;
		(b[10] => z[21]) = 0;
		(b[11] => z[21]) = 0;
		(b[12] => z[21]) = 0;
		(b[13] => z[21]) = 0;
		(b[14] => z[21]) = 0;
		(b[15] => z[21]) = 0;
		(b[16] => z[21]) = 0;
		(b[17] => z[21]) = 0;
		(a[0] => z[22]) = 0;
		(a[1] => z[22]) = 0;
		(a[2] => z[22]) = 0;
		(a[3] => z[22]) = 0;
		(a[4] => z[22]) = 0;
		(a[5] => z[22]) = 0;
		(a[6] => z[22]) = 0;
		(a[7] => z[22]) = 0;
		(a[8] => z[22]) = 0;
		(a[9] => z[22]) = 0;
		(a[10] => z[22]) = 0;
		(a[11] => z[22]) = 0;
		(a[12] => z[22]) = 0;
		(a[13] => z[22]) = 0;
		(a[14] => z[22]) = 0;
		(a[15] => z[22]) = 0;
		(a[16] => z[22]) = 0;
		(a[17] => z[22]) = 0;
		(a[18] => z[22]) = 0;
		(a[19] => z[22]) = 0;
		(b[0] => z[22]) = 0;
		(b[1] => z[22]) = 0;
		(b[2] => z[22]) = 0;
		(b[3] => z[22]) = 0;
		(b[4] => z[22]) = 0;
		(b[5] => z[22]) = 0;
		(b[6] => z[22]) = 0;
		(b[7] => z[22]) = 0;
		(b[8] => z[22]) = 0;
		(b[9] => z[22]) = 0;
		(b[10] => z[22]) = 0;
		(b[11] => z[22]) = 0;
		(b[12] => z[22]) = 0;
		(b[13] => z[22]) = 0;
		(b[14] => z[22]) = 0;
		(b[15] => z[22]) = 0;
		(b[16] => z[22]) = 0;
		(b[17] => z[22]) = 0;
		(a[0] => z[23]) = 0;
		(a[1] => z[23]) = 0;
		(a[2] => z[23]) = 0;
		(a[3] => z[23]) = 0;
		(a[4] => z[23]) = 0;
		(a[5] => z[23]) = 0;
		(a[6] => z[23]) = 0;
		(a[7] => z[23]) = 0;
		(a[8] => z[23]) = 0;
		(a[9] => z[23]) = 0;
		(a[10] => z[23]) = 0;
		(a[11] => z[23]) = 0;
		(a[12] => z[23]) = 0;
		(a[13] => z[23]) = 0;
		(a[14] => z[23]) = 0;
		(a[15] => z[23]) = 0;
		(a[16] => z[23]) = 0;
		(a[17] => z[23]) = 0;
		(a[18] => z[23]) = 0;
		(a[19] => z[23]) = 0;
		(b[0] => z[23]) = 0;
		(b[1] => z[23]) = 0;
		(b[2] => z[23]) = 0;
		(b[3] => z[23]) = 0;
		(b[4] => z[23]) = 0;
		(b[5] => z[23]) = 0;
		(b[6] => z[23]) = 0;
		(b[7] => z[23]) = 0;
		(b[8] => z[23]) = 0;
		(b[9] => z[23]) = 0;
		(b[10] => z[23]) = 0;
		(b[11] => z[23]) = 0;
		(b[12] => z[23]) = 0;
		(b[13] => z[23]) = 0;
		(b[14] => z[23]) = 0;
		(b[15] => z[23]) = 0;
		(b[16] => z[23]) = 0;
		(b[17] => z[23]) = 0;
		(a[0] => z[24]) = 0;
		(a[1] => z[24]) = 0;
		(a[2] => z[24]) = 0;
		(a[3] => z[24]) = 0;
		(a[4] => z[24]) = 0;
		(a[5] => z[24]) = 0;
		(a[6] => z[24]) = 0;
		(a[7] => z[24]) = 0;
		(a[8] => z[24]) = 0;
		(a[9] => z[24]) = 0;
		(a[10] => z[24]) = 0;
		(a[11] => z[24]) = 0;
		(a[12] => z[24]) = 0;
		(a[13] => z[24]) = 0;
		(a[14] => z[24]) = 0;
		(a[15] => z[24]) = 0;
		(a[16] => z[24]) = 0;
		(a[17] => z[24]) = 0;
		(a[18] => z[24]) = 0;
		(a[19] => z[24]) = 0;
		(b[0] => z[24]) = 0;
		(b[1] => z[24]) = 0;
		(b[2] => z[24]) = 0;
		(b[3] => z[24]) = 0;
		(b[4] => z[24]) = 0;
		(b[5] => z[24]) = 0;
		(b[6] => z[24]) = 0;
		(b[7] => z[24]) = 0;
		(b[8] => z[24]) = 0;
		(b[9] => z[24]) = 0;
		(b[10] => z[24]) = 0;
		(b[11] => z[24]) = 0;
		(b[12] => z[24]) = 0;
		(b[13] => z[24]) = 0;
		(b[14] => z[24]) = 0;
		(b[15] => z[24]) = 0;
		(b[16] => z[24]) = 0;
		(b[17] => z[24]) = 0;
		(a[0] => z[25]) = 0;
		(a[1] => z[25]) = 0;
		(a[2] => z[25]) = 0;
		(a[3] => z[25]) = 0;
		(a[4] => z[25]) = 0;
		(a[5] => z[25]) = 0;
		(a[6] => z[25]) = 0;
		(a[7] => z[25]) = 0;
		(a[8] => z[25]) = 0;
		(a[9] => z[25]) = 0;
		(a[10] => z[25]) = 0;
		(a[11] => z[25]) = 0;
		(a[12] => z[25]) = 0;
		(a[13] => z[25]) = 0;
		(a[14] => z[25]) = 0;
		(a[15] => z[25]) = 0;
		(a[16] => z[25]) = 0;
		(a[17] => z[25]) = 0;
		(a[18] => z[25]) = 0;
		(a[19] => z[25]) = 0;
		(b[0] => z[25]) = 0;
		(b[1] => z[25]) = 0;
		(b[2] => z[25]) = 0;
		(b[3] => z[25]) = 0;
		(b[4] => z[25]) = 0;
		(b[5] => z[25]) = 0;
		(b[6] => z[25]) = 0;
		(b[7] => z[25]) = 0;
		(b[8] => z[25]) = 0;
		(b[9] => z[25]) = 0;
		(b[10] => z[25]) = 0;
		(b[11] => z[25]) = 0;
		(b[12] => z[25]) = 0;
		(b[13] => z[25]) = 0;
		(b[14] => z[25]) = 0;
		(b[15] => z[25]) = 0;
		(b[16] => z[25]) = 0;
		(b[17] => z[25]) = 0;
		(a[0] => z[26]) = 0;
		(a[1] => z[26]) = 0;
		(a[2] => z[26]) = 0;
		(a[3] => z[26]) = 0;
		(a[4] => z[26]) = 0;
		(a[5] => z[26]) = 0;
		(a[6] => z[26]) = 0;
		(a[7] => z[26]) = 0;
		(a[8] => z[26]) = 0;
		(a[9] => z[26]) = 0;
		(a[10] => z[26]) = 0;
		(a[11] => z[26]) = 0;
		(a[12] => z[26]) = 0;
		(a[13] => z[26]) = 0;
		(a[14] => z[26]) = 0;
		(a[15] => z[26]) = 0;
		(a[16] => z[26]) = 0;
		(a[17] => z[26]) = 0;
		(a[18] => z[26]) = 0;
		(a[19] => z[26]) = 0;
		(b[0] => z[26]) = 0;
		(b[1] => z[26]) = 0;
		(b[2] => z[26]) = 0;
		(b[3] => z[26]) = 0;
		(b[4] => z[26]) = 0;
		(b[5] => z[26]) = 0;
		(b[6] => z[26]) = 0;
		(b[7] => z[26]) = 0;
		(b[8] => z[26]) = 0;
		(b[9] => z[26]) = 0;
		(b[10] => z[26]) = 0;
		(b[11] => z[26]) = 0;
		(b[12] => z[26]) = 0;
		(b[13] => z[26]) = 0;
		(b[14] => z[26]) = 0;
		(b[15] => z[26]) = 0;
		(b[16] => z[26]) = 0;
		(b[17] => z[26]) = 0;
		(a[0] => z[27]) = 0;
		(a[1] => z[27]) = 0;
		(a[2] => z[27]) = 0;
		(a[3] => z[27]) = 0;
		(a[4] => z[27]) = 0;
		(a[5] => z[27]) = 0;
		(a[6] => z[27]) = 0;
		(a[7] => z[27]) = 0;
		(a[8] => z[27]) = 0;
		(a[9] => z[27]) = 0;
		(a[10] => z[27]) = 0;
		(a[11] => z[27]) = 0;
		(a[12] => z[27]) = 0;
		(a[13] => z[27]) = 0;
		(a[14] => z[27]) = 0;
		(a[15] => z[27]) = 0;
		(a[16] => z[27]) = 0;
		(a[17] => z[27]) = 0;
		(a[18] => z[27]) = 0;
		(a[19] => z[27]) = 0;
		(b[0] => z[27]) = 0;
		(b[1] => z[27]) = 0;
		(b[2] => z[27]) = 0;
		(b[3] => z[27]) = 0;
		(b[4] => z[27]) = 0;
		(b[5] => z[27]) = 0;
		(b[6] => z[27]) = 0;
		(b[7] => z[27]) = 0;
		(b[8] => z[27]) = 0;
		(b[9] => z[27]) = 0;
		(b[10] => z[27]) = 0;
		(b[11] => z[27]) = 0;
		(b[12] => z[27]) = 0;
		(b[13] => z[27]) = 0;
		(b[14] => z[27]) = 0;
		(b[15] => z[27]) = 0;
		(b[16] => z[27]) = 0;
		(b[17] => z[27]) = 0;
		(a[0] => z[28]) = 0;
		(a[1] => z[28]) = 0;
		(a[2] => z[28]) = 0;
		(a[3] => z[28]) = 0;
		(a[4] => z[28]) = 0;
		(a[5] => z[28]) = 0;
		(a[6] => z[28]) = 0;
		(a[7] => z[28]) = 0;
		(a[8] => z[28]) = 0;
		(a[9] => z[28]) = 0;
		(a[10] => z[28]) = 0;
		(a[11] => z[28]) = 0;
		(a[12] => z[28]) = 0;
		(a[13] => z[28]) = 0;
		(a[14] => z[28]) = 0;
		(a[15] => z[28]) = 0;
		(a[16] => z[28]) = 0;
		(a[17] => z[28]) = 0;
		(a[18] => z[28]) = 0;
		(a[19] => z[28]) = 0;
		(b[0] => z[28]) = 0;
		(b[1] => z[28]) = 0;
		(b[2] => z[28]) = 0;
		(b[3] => z[28]) = 0;
		(b[4] => z[28]) = 0;
		(b[5] => z[28]) = 0;
		(b[6] => z[28]) = 0;
		(b[7] => z[28]) = 0;
		(b[8] => z[28]) = 0;
		(b[9] => z[28]) = 0;
		(b[10] => z[28]) = 0;
		(b[11] => z[28]) = 0;
		(b[12] => z[28]) = 0;
		(b[13] => z[28]) = 0;
		(b[14] => z[28]) = 0;
		(b[15] => z[28]) = 0;
		(b[16] => z[28]) = 0;
		(b[17] => z[28]) = 0;
		(a[0] => z[29]) = 0;
		(a[1] => z[29]) = 0;
		(a[2] => z[29]) = 0;
		(a[3] => z[29]) = 0;
		(a[4] => z[29]) = 0;
		(a[5] => z[29]) = 0;
		(a[6] => z[29]) = 0;
		(a[7] => z[29]) = 0;
		(a[8] => z[29]) = 0;
		(a[9] => z[29]) = 0;
		(a[10] => z[29]) = 0;
		(a[11] => z[29]) = 0;
		(a[12] => z[29]) = 0;
		(a[13] => z[29]) = 0;
		(a[14] => z[29]) = 0;
		(a[15] => z[29]) = 0;
		(a[16] => z[29]) = 0;
		(a[17] => z[29]) = 0;
		(a[18] => z[29]) = 0;
		(a[19] => z[29]) = 0;
		(b[0] => z[29]) = 0;
		(b[1] => z[29]) = 0;
		(b[2] => z[29]) = 0;
		(b[3] => z[29]) = 0;
		(b[4] => z[29]) = 0;
		(b[5] => z[29]) = 0;
		(b[6] => z[29]) = 0;
		(b[7] => z[29]) = 0;
		(b[8] => z[29]) = 0;
		(b[9] => z[29]) = 0;
		(b[10] => z[29]) = 0;
		(b[11] => z[29]) = 0;
		(b[12] => z[29]) = 0;
		(b[13] => z[29]) = 0;
		(b[14] => z[29]) = 0;
		(b[15] => z[29]) = 0;
		(b[16] => z[29]) = 0;
		(b[17] => z[29]) = 0;
		(a[0] => z[30]) = 0;
		(a[1] => z[30]) = 0;
		(a[2] => z[30]) = 0;
		(a[3] => z[30]) = 0;
		(a[4] => z[30]) = 0;
		(a[5] => z[30]) = 0;
		(a[6] => z[30]) = 0;
		(a[7] => z[30]) = 0;
		(a[8] => z[30]) = 0;
		(a[9] => z[30]) = 0;
		(a[10] => z[30]) = 0;
		(a[11] => z[30]) = 0;
		(a[12] => z[30]) = 0;
		(a[13] => z[30]) = 0;
		(a[14] => z[30]) = 0;
		(a[15] => z[30]) = 0;
		(a[16] => z[30]) = 0;
		(a[17] => z[30]) = 0;
		(a[18] => z[30]) = 0;
		(a[19] => z[30]) = 0;
		(b[0] => z[30]) = 0;
		(b[1] => z[30]) = 0;
		(b[2] => z[30]) = 0;
		(b[3] => z[30]) = 0;
		(b[4] => z[30]) = 0;
		(b[5] => z[30]) = 0;
		(b[6] => z[30]) = 0;
		(b[7] => z[30]) = 0;
		(b[8] => z[30]) = 0;
		(b[9] => z[30]) = 0;
		(b[10] => z[30]) = 0;
		(b[11] => z[30]) = 0;
		(b[12] => z[30]) = 0;
		(b[13] => z[30]) = 0;
		(b[14] => z[30]) = 0;
		(b[15] => z[30]) = 0;
		(b[16] => z[30]) = 0;
		(b[17] => z[30]) = 0;
		(a[0] => z[31]) = 0;
		(a[1] => z[31]) = 0;
		(a[2] => z[31]) = 0;
		(a[3] => z[31]) = 0;
		(a[4] => z[31]) = 0;
		(a[5] => z[31]) = 0;
		(a[6] => z[31]) = 0;
		(a[7] => z[31]) = 0;
		(a[8] => z[31]) = 0;
		(a[9] => z[31]) = 0;
		(a[10] => z[31]) = 0;
		(a[11] => z[31]) = 0;
		(a[12] => z[31]) = 0;
		(a[13] => z[31]) = 0;
		(a[14] => z[31]) = 0;
		(a[15] => z[31]) = 0;
		(a[16] => z[31]) = 0;
		(a[17] => z[31]) = 0;
		(a[18] => z[31]) = 0;
		(a[19] => z[31]) = 0;
		(b[0] => z[31]) = 0;
		(b[1] => z[31]) = 0;
		(b[2] => z[31]) = 0;
		(b[3] => z[31]) = 0;
		(b[4] => z[31]) = 0;
		(b[5] => z[31]) = 0;
		(b[6] => z[31]) = 0;
		(b[7] => z[31]) = 0;
		(b[8] => z[31]) = 0;
		(b[9] => z[31]) = 0;
		(b[10] => z[31]) = 0;
		(b[11] => z[31]) = 0;
		(b[12] => z[31]) = 0;
		(b[13] => z[31]) = 0;
		(b[14] => z[31]) = 0;
		(b[15] => z[31]) = 0;
		(b[16] => z[31]) = 0;
		(b[17] => z[31]) = 0;
		(a[0] => z[32]) = 0;
		(a[1] => z[32]) = 0;
		(a[2] => z[32]) = 0;
		(a[3] => z[32]) = 0;
		(a[4] => z[32]) = 0;
		(a[5] => z[32]) = 0;
		(a[6] => z[32]) = 0;
		(a[7] => z[32]) = 0;
		(a[8] => z[32]) = 0;
		(a[9] => z[32]) = 0;
		(a[10] => z[32]) = 0;
		(a[11] => z[32]) = 0;
		(a[12] => z[32]) = 0;
		(a[13] => z[32]) = 0;
		(a[14] => z[32]) = 0;
		(a[15] => z[32]) = 0;
		(a[16] => z[32]) = 0;
		(a[17] => z[32]) = 0;
		(a[18] => z[32]) = 0;
		(a[19] => z[32]) = 0;
		(b[0] => z[32]) = 0;
		(b[1] => z[32]) = 0;
		(b[2] => z[32]) = 0;
		(b[3] => z[32]) = 0;
		(b[4] => z[32]) = 0;
		(b[5] => z[32]) = 0;
		(b[6] => z[32]) = 0;
		(b[7] => z[32]) = 0;
		(b[8] => z[32]) = 0;
		(b[9] => z[32]) = 0;
		(b[10] => z[32]) = 0;
		(b[11] => z[32]) = 0;
		(b[12] => z[32]) = 0;
		(b[13] => z[32]) = 0;
		(b[14] => z[32]) = 0;
		(b[15] => z[32]) = 0;
		(b[16] => z[32]) = 0;
		(b[17] => z[32]) = 0;
		(a[0] => z[33]) = 0;
		(a[1] => z[33]) = 0;
		(a[2] => z[33]) = 0;
		(a[3] => z[33]) = 0;
		(a[4] => z[33]) = 0;
		(a[5] => z[33]) = 0;
		(a[6] => z[33]) = 0;
		(a[7] => z[33]) = 0;
		(a[8] => z[33]) = 0;
		(a[9] => z[33]) = 0;
		(a[10] => z[33]) = 0;
		(a[11] => z[33]) = 0;
		(a[12] => z[33]) = 0;
		(a[13] => z[33]) = 0;
		(a[14] => z[33]) = 0;
		(a[15] => z[33]) = 0;
		(a[16] => z[33]) = 0;
		(a[17] => z[33]) = 0;
		(a[18] => z[33]) = 0;
		(a[19] => z[33]) = 0;
		(b[0] => z[33]) = 0;
		(b[1] => z[33]) = 0;
		(b[2] => z[33]) = 0;
		(b[3] => z[33]) = 0;
		(b[4] => z[33]) = 0;
		(b[5] => z[33]) = 0;
		(b[6] => z[33]) = 0;
		(b[7] => z[33]) = 0;
		(b[8] => z[33]) = 0;
		(b[9] => z[33]) = 0;
		(b[10] => z[33]) = 0;
		(b[11] => z[33]) = 0;
		(b[12] => z[33]) = 0;
		(b[13] => z[33]) = 0;
		(b[14] => z[33]) = 0;
		(b[15] => z[33]) = 0;
		(b[16] => z[33]) = 0;
		(b[17] => z[33]) = 0;
		(a[0] => z[34]) = 0;
		(a[1] => z[34]) = 0;
		(a[2] => z[34]) = 0;
		(a[3] => z[34]) = 0;
		(a[4] => z[34]) = 0;
		(a[5] => z[34]) = 0;
		(a[6] => z[34]) = 0;
		(a[7] => z[34]) = 0;
		(a[8] => z[34]) = 0;
		(a[9] => z[34]) = 0;
		(a[10] => z[34]) = 0;
		(a[11] => z[34]) = 0;
		(a[12] => z[34]) = 0;
		(a[13] => z[34]) = 0;
		(a[14] => z[34]) = 0;
		(a[15] => z[34]) = 0;
		(a[16] => z[34]) = 0;
		(a[17] => z[34]) = 0;
		(a[18] => z[34]) = 0;
		(a[19] => z[34]) = 0;
		(b[0] => z[34]) = 0;
		(b[1] => z[34]) = 0;
		(b[2] => z[34]) = 0;
		(b[3] => z[34]) = 0;
		(b[4] => z[34]) = 0;
		(b[5] => z[34]) = 0;
		(b[6] => z[34]) = 0;
		(b[7] => z[34]) = 0;
		(b[8] => z[34]) = 0;
		(b[9] => z[34]) = 0;
		(b[10] => z[34]) = 0;
		(b[11] => z[34]) = 0;
		(b[12] => z[34]) = 0;
		(b[13] => z[34]) = 0;
		(b[14] => z[34]) = 0;
		(b[15] => z[34]) = 0;
		(b[16] => z[34]) = 0;
		(b[17] => z[34]) = 0;
		(a[0] => z[35]) = 0;
		(a[1] => z[35]) = 0;
		(a[2] => z[35]) = 0;
		(a[3] => z[35]) = 0;
		(a[4] => z[35]) = 0;
		(a[5] => z[35]) = 0;
		(a[6] => z[35]) = 0;
		(a[7] => z[35]) = 0;
		(a[8] => z[35]) = 0;
		(a[9] => z[35]) = 0;
		(a[10] => z[35]) = 0;
		(a[11] => z[35]) = 0;
		(a[12] => z[35]) = 0;
		(a[13] => z[35]) = 0;
		(a[14] => z[35]) = 0;
		(a[15] => z[35]) = 0;
		(a[16] => z[35]) = 0;
		(a[17] => z[35]) = 0;
		(a[18] => z[35]) = 0;
		(a[19] => z[35]) = 0;
		(b[0] => z[35]) = 0;
		(b[1] => z[35]) = 0;
		(b[2] => z[35]) = 0;
		(b[3] => z[35]) = 0;
		(b[4] => z[35]) = 0;
		(b[5] => z[35]) = 0;
		(b[6] => z[35]) = 0;
		(b[7] => z[35]) = 0;
		(b[8] => z[35]) = 0;
		(b[9] => z[35]) = 0;
		(b[10] => z[35]) = 0;
		(b[11] => z[35]) = 0;
		(b[12] => z[35]) = 0;
		(b[13] => z[35]) = 0;
		(b[14] => z[35]) = 0;
		(b[15] => z[35]) = 0;
		(b[16] => z[35]) = 0;
		(b[17] => z[35]) = 0;
		(a[0] => z[36]) = 0;
		(a[1] => z[36]) = 0;
		(a[2] => z[36]) = 0;
		(a[3] => z[36]) = 0;
		(a[4] => z[36]) = 0;
		(a[5] => z[36]) = 0;
		(a[6] => z[36]) = 0;
		(a[7] => z[36]) = 0;
		(a[8] => z[36]) = 0;
		(a[9] => z[36]) = 0;
		(a[10] => z[36]) = 0;
		(a[11] => z[36]) = 0;
		(a[12] => z[36]) = 0;
		(a[13] => z[36]) = 0;
		(a[14] => z[36]) = 0;
		(a[15] => z[36]) = 0;
		(a[16] => z[36]) = 0;
		(a[17] => z[36]) = 0;
		(a[18] => z[36]) = 0;
		(a[19] => z[36]) = 0;
		(b[0] => z[36]) = 0;
		(b[1] => z[36]) = 0;
		(b[2] => z[36]) = 0;
		(b[3] => z[36]) = 0;
		(b[4] => z[36]) = 0;
		(b[5] => z[36]) = 0;
		(b[6] => z[36]) = 0;
		(b[7] => z[36]) = 0;
		(b[8] => z[36]) = 0;
		(b[9] => z[36]) = 0;
		(b[10] => z[36]) = 0;
		(b[11] => z[36]) = 0;
		(b[12] => z[36]) = 0;
		(b[13] => z[36]) = 0;
		(b[14] => z[36]) = 0;
		(b[15] => z[36]) = 0;
		(b[16] => z[36]) = 0;
		(b[17] => z[36]) = 0;
		(a[0] => z[37]) = 0;
		(a[1] => z[37]) = 0;
		(a[2] => z[37]) = 0;
		(a[3] => z[37]) = 0;
		(a[4] => z[37]) = 0;
		(a[5] => z[37]) = 0;
		(a[6] => z[37]) = 0;
		(a[7] => z[37]) = 0;
		(a[8] => z[37]) = 0;
		(a[9] => z[37]) = 0;
		(a[10] => z[37]) = 0;
		(a[11] => z[37]) = 0;
		(a[12] => z[37]) = 0;
		(a[13] => z[37]) = 0;
		(a[14] => z[37]) = 0;
		(a[15] => z[37]) = 0;
		(a[16] => z[37]) = 0;
		(a[17] => z[37]) = 0;
		(a[18] => z[37]) = 0;
		(a[19] => z[37]) = 0;
		(b[0] => z[37]) = 0;
		(b[1] => z[37]) = 0;
		(b[2] => z[37]) = 0;
		(b[3] => z[37]) = 0;
		(b[4] => z[37]) = 0;
		(b[5] => z[37]) = 0;
		(b[6] => z[37]) = 0;
		(b[7] => z[37]) = 0;
		(b[8] => z[37]) = 0;
		(b[9] => z[37]) = 0;
		(b[10] => z[37]) = 0;
		(b[11] => z[37]) = 0;
		(b[12] => z[37]) = 0;
		(b[13] => z[37]) = 0;
		(b[14] => z[37]) = 0;
		(b[15] => z[37]) = 0;
		(b[16] => z[37]) = 0;
		(b[17] => z[37]) = 0;
		(subtract => z[0]) = 0;
		(subtract => z[1]) = 0;
		(subtract => z[2]) = 0;
		(subtract => z[3]) = 0;
		(subtract => z[4]) = 0;
		(subtract => z[5]) = 0;
		(subtract => z[6]) = 0;
		(subtract => z[7]) = 0;
		(subtract => z[8]) = 0;
		(subtract => z[9]) = 0;
		(subtract => z[10]) = 0;
		(subtract => z[11]) = 0;
		(subtract => z[12]) = 0;
		(subtract => z[13]) = 0;
		(subtract => z[14]) = 0;
		(subtract => z[15]) = 0;
		(subtract => z[16]) = 0;
		(subtract => z[17]) = 0;
		(subtract => z[18]) = 0;
		(subtract => z[19]) = 0;
		(subtract => z[20]) = 0;
		(subtract => z[21]) = 0;
		(subtract => z[22]) = 0;
		(subtract => z[23]) = 0;
		(subtract => z[24]) = 0;
		(subtract => z[25]) = 0;
		(subtract => z[26]) = 0;
		(subtract => z[27]) = 0;
		(subtract => z[28]) = 0;
		(subtract => z[29]) = 0;
		(subtract => z[30]) = 0;
		(subtract => z[31]) = 0;
		(subtract => z[32]) = 0;
		(subtract => z[33]) = 0;
		(subtract => z[34]) = 0;
		(subtract => z[35]) = 0;
		(subtract => z[36]) = 0;
		(subtract => z[37]) = 0;
		(acc_fir[0] => z[0]) = 0;
		(acc_fir[1] => z[0]) = 0;
		(acc_fir[2] => z[0]) = 0;
		(acc_fir[3] => z[0]) = 0;
		(acc_fir[4] => z[0]) = 0;
		(acc_fir[5] => z[0]) = 0;
		(acc_fir[0] => z[1]) = 0;
		(acc_fir[1] => z[1]) = 0;
		(acc_fir[2] => z[1]) = 0;
		(acc_fir[3] => z[1]) = 0;
		(acc_fir[4] => z[1]) = 0;
		(acc_fir[5] => z[1]) = 0;
		(acc_fir[0] => z[2]) = 0;
		(acc_fir[1] => z[2]) = 0;
		(acc_fir[2] => z[2]) = 0;
		(acc_fir[3] => z[2]) = 0;
		(acc_fir[4] => z[2]) = 0;
		(acc_fir[5] => z[2]) = 0;
		(acc_fir[0] => z[3]) = 0;
		(acc_fir[1] => z[3]) = 0;
		(acc_fir[2] => z[3]) = 0;
		(acc_fir[3] => z[3]) = 0;
		(acc_fir[4] => z[3]) = 0;
		(acc_fir[5] => z[3]) = 0;
		(acc_fir[0] => z[4]) = 0;
		(acc_fir[1] => z[4]) = 0;
		(acc_fir[2] => z[4]) = 0;
		(acc_fir[3] => z[4]) = 0;
		(acc_fir[4] => z[4]) = 0;
		(acc_fir[5] => z[4]) = 0;
		(acc_fir[0] => z[5]) = 0;
		(acc_fir[1] => z[5]) = 0;
		(acc_fir[2] => z[5]) = 0;
		(acc_fir[3] => z[5]) = 0;
		(acc_fir[4] => z[5]) = 0;
		(acc_fir[5] => z[5]) = 0;
		(acc_fir[0] => z[6]) = 0;
		(acc_fir[1] => z[6]) = 0;
		(acc_fir[2] => z[6]) = 0;
		(acc_fir[3] => z[6]) = 0;
		(acc_fir[4] => z[6]) = 0;
		(acc_fir[5] => z[6]) = 0;
		(acc_fir[0] => z[7]) = 0;
		(acc_fir[1] => z[7]) = 0;
		(acc_fir[2] => z[7]) = 0;
		(acc_fir[3] => z[7]) = 0;
		(acc_fir[4] => z[7]) = 0;
		(acc_fir[5] => z[7]) = 0;
		(acc_fir[0] => z[8]) = 0;
		(acc_fir[1] => z[8]) = 0;
		(acc_fir[2] => z[8]) = 0;
		(acc_fir[3] => z[8]) = 0;
		(acc_fir[4] => z[8]) = 0;
		(acc_fir[5] => z[8]) = 0;
		(acc_fir[0] => z[9]) = 0;
		(acc_fir[1] => z[9]) = 0;
		(acc_fir[2] => z[9]) = 0;
		(acc_fir[3] => z[9]) = 0;
		(acc_fir[4] => z[9]) = 0;
		(acc_fir[5] => z[9]) = 0;
		(acc_fir[0] => z[10]) = 0;
		(acc_fir[1] => z[10]) = 0;
		(acc_fir[2] => z[10]) = 0;
		(acc_fir[3] => z[10]) = 0;
		(acc_fir[4] => z[10]) = 0;
		(acc_fir[5] => z[10]) = 0;
		(acc_fir[0] => z[11]) = 0;
		(acc_fir[1] => z[11]) = 0;
		(acc_fir[2] => z[11]) = 0;
		(acc_fir[3] => z[11]) = 0;
		(acc_fir[4] => z[11]) = 0;
		(acc_fir[5] => z[11]) = 0;
		(acc_fir[0] => z[12]) = 0;
		(acc_fir[1] => z[12]) = 0;
		(acc_fir[2] => z[12]) = 0;
		(acc_fir[3] => z[12]) = 0;
		(acc_fir[4] => z[12]) = 0;
		(acc_fir[5] => z[12]) = 0;
		(acc_fir[0] => z[13]) = 0;
		(acc_fir[1] => z[13]) = 0;
		(acc_fir[2] => z[13]) = 0;
		(acc_fir[3] => z[13]) = 0;
		(acc_fir[4] => z[13]) = 0;
		(acc_fir[5] => z[13]) = 0;
		(acc_fir[0] => z[14]) = 0;
		(acc_fir[1] => z[14]) = 0;
		(acc_fir[2] => z[14]) = 0;
		(acc_fir[3] => z[14]) = 0;
		(acc_fir[4] => z[14]) = 0;
		(acc_fir[5] => z[14]) = 0;
		(acc_fir[0] => z[15]) = 0;
		(acc_fir[1] => z[15]) = 0;
		(acc_fir[2] => z[15]) = 0;
		(acc_fir[3] => z[15]) = 0;
		(acc_fir[4] => z[15]) = 0;
		(acc_fir[5] => z[15]) = 0;
		(acc_fir[0] => z[16]) = 0;
		(acc_fir[1] => z[16]) = 0;
		(acc_fir[2] => z[16]) = 0;
		(acc_fir[3] => z[16]) = 0;
		(acc_fir[4] => z[16]) = 0;
		(acc_fir[5] => z[16]) = 0;
		(acc_fir[0] => z[17]) = 0;
		(acc_fir[1] => z[17]) = 0;
		(acc_fir[2] => z[17]) = 0;
		(acc_fir[3] => z[17]) = 0;
		(acc_fir[4] => z[17]) = 0;
		(acc_fir[5] => z[17]) = 0;
		(acc_fir[0] => z[18]) = 0;
		(acc_fir[1] => z[18]) = 0;
		(acc_fir[2] => z[18]) = 0;
		(acc_fir[3] => z[18]) = 0;
		(acc_fir[4] => z[18]) = 0;
		(acc_fir[5] => z[18]) = 0;
		(acc_fir[0] => z[19]) = 0;
		(acc_fir[1] => z[19]) = 0;
		(acc_fir[2] => z[19]) = 0;
		(acc_fir[3] => z[19]) = 0;
		(acc_fir[4] => z[19]) = 0;
		(acc_fir[5] => z[19]) = 0;
		(acc_fir[0] => z[20]) = 0;
		(acc_fir[1] => z[20]) = 0;
		(acc_fir[2] => z[20]) = 0;
		(acc_fir[3] => z[20]) = 0;
		(acc_fir[4] => z[20]) = 0;
		(acc_fir[5] => z[20]) = 0;
		(acc_fir[0] => z[21]) = 0;
		(acc_fir[1] => z[21]) = 0;
		(acc_fir[2] => z[21]) = 0;
		(acc_fir[3] => z[21]) = 0;
		(acc_fir[4] => z[21]) = 0;
		(acc_fir[5] => z[21]) = 0;
		(acc_fir[0] => z[22]) = 0;
		(acc_fir[1] => z[22]) = 0;
		(acc_fir[2] => z[22]) = 0;
		(acc_fir[3] => z[22]) = 0;
		(acc_fir[4] => z[22]) = 0;
		(acc_fir[5] => z[22]) = 0;
		(acc_fir[0] => z[23]) = 0;
		(acc_fir[1] => z[23]) = 0;
		(acc_fir[2] => z[23]) = 0;
		(acc_fir[3] => z[23]) = 0;
		(acc_fir[4] => z[23]) = 0;
		(acc_fir[5] => z[23]) = 0;
		(acc_fir[0] => z[24]) = 0;
		(acc_fir[1] => z[24]) = 0;
		(acc_fir[2] => z[24]) = 0;
		(acc_fir[3] => z[24]) = 0;
		(acc_fir[4] => z[24]) = 0;
		(acc_fir[5] => z[24]) = 0;
		(acc_fir[0] => z[25]) = 0;
		(acc_fir[1] => z[25]) = 0;
		(acc_fir[2] => z[25]) = 0;
		(acc_fir[3] => z[25]) = 0;
		(acc_fir[4] => z[25]) = 0;
		(acc_fir[5] => z[25]) = 0;
		(acc_fir[0] => z[26]) = 0;
		(acc_fir[1] => z[26]) = 0;
		(acc_fir[2] => z[26]) = 0;
		(acc_fir[3] => z[26]) = 0;
		(acc_fir[4] => z[26]) = 0;
		(acc_fir[5] => z[26]) = 0;
		(acc_fir[0] => z[27]) = 0;
		(acc_fir[1] => z[27]) = 0;
		(acc_fir[2] => z[27]) = 0;
		(acc_fir[3] => z[27]) = 0;
		(acc_fir[4] => z[27]) = 0;
		(acc_fir[5] => z[27]) = 0;
		(acc_fir[0] => z[28]) = 0;
		(acc_fir[1] => z[28]) = 0;
		(acc_fir[2] => z[28]) = 0;
		(acc_fir[3] => z[28]) = 0;
		(acc_fir[4] => z[28]) = 0;
		(acc_fir[5] => z[28]) = 0;
		(acc_fir[0] => z[29]) = 0;
		(acc_fir[1] => z[29]) = 0;
		(acc_fir[2] => z[29]) = 0;
		(acc_fir[3] => z[29]) = 0;
		(acc_fir[4] => z[29]) = 0;
		(acc_fir[5] => z[29]) = 0;
		(acc_fir[0] => z[30]) = 0;
		(acc_fir[1] => z[30]) = 0;
		(acc_fir[2] => z[30]) = 0;
		(acc_fir[3] => z[30]) = 0;
		(acc_fir[4] => z[30]) = 0;
		(acc_fir[5] => z[30]) = 0;
		(acc_fir[0] => z[31]) = 0;
		(acc_fir[1] => z[31]) = 0;
		(acc_fir[2] => z[31]) = 0;
		(acc_fir[3] => z[31]) = 0;
		(acc_fir[4] => z[31]) = 0;
		(acc_fir[5] => z[31]) = 0;
		(acc_fir[0] => z[32]) = 0;
		(acc_fir[1] => z[32]) = 0;
		(acc_fir[2] => z[32]) = 0;
		(acc_fir[3] => z[32]) = 0;
		(acc_fir[4] => z[32]) = 0;
		(acc_fir[5] => z[32]) = 0;
		(acc_fir[0] => z[33]) = 0;
		(acc_fir[1] => z[33]) = 0;
		(acc_fir[2] => z[33]) = 0;
		(acc_fir[3] => z[33]) = 0;
		(acc_fir[4] => z[33]) = 0;
		(acc_fir[5] => z[33]) = 0;
		(acc_fir[0] => z[34]) = 0;
		(acc_fir[1] => z[34]) = 0;
		(acc_fir[2] => z[34]) = 0;
		(acc_fir[3] => z[34]) = 0;
		(acc_fir[4] => z[34]) = 0;
		(acc_fir[5] => z[34]) = 0;
		(acc_fir[0] => z[35]) = 0;
		(acc_fir[1] => z[35]) = 0;
		(acc_fir[2] => z[35]) = 0;
		(acc_fir[3] => z[35]) = 0;
		(acc_fir[4] => z[35]) = 0;
		(acc_fir[5] => z[35]) = 0;
		(acc_fir[0] => z[36]) = 0;
		(acc_fir[1] => z[36]) = 0;
		(acc_fir[2] => z[36]) = 0;
		(acc_fir[3] => z[36]) = 0;
		(acc_fir[4] => z[36]) = 0;
		(acc_fir[5] => z[36]) = 0;
		(acc_fir[0] => z[37]) = 0;
		(acc_fir[1] => z[37]) = 0;
		(acc_fir[2] => z[37]) = 0;
		(acc_fir[3] => z[37]) = 0;
		(acc_fir[4] => z[37]) = 0;
		(acc_fir[5] => z[37]) = 0;
	endspecify
`endif

endmodule

module QL_DSP2_MULTADD_REGIN (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire [ 5:0] acc_fir,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.dly_b(),
		.z(z),

		.f_mode(f_mode),

		.feedback(feedback),
		.acc_fir(acc_fir),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // unregistered output: ACCin (2, 3)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
		$setuphold(posedge clk, acc_fir, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTADD_REGOUT (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire [ 5:0] acc_fir,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.dly_b(),
		.z(z),

		.f_mode(f_mode),

		.feedback(feedback),
		.acc_fir(acc_fir),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: ACCin (6, 7)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
		$setuphold(posedge clk, acc_fir, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTADD_REGIN_REGOUT (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire [ 5:0] acc_fir,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.dly_b(),
		.z(z),

		.f_mode(f_mode),

		.feedback(feedback),
		.acc_fir(acc_fir),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: ACCin (6, 7)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
		$setuphold(posedge clk, acc_fir, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTACC (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire        load_acc,
	input  wire [ 2:0] feedback,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // unregistered output: ACCout (1)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTACC_REGIN (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // unregistered output: ACCout (1)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTACC_REGOUT (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: ACCout (5)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // unregistered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
	endspecify
`endif

endmodule

module QL_DSP2_MULTACC_REGIN_REGOUT (
	input  wire [19:0] a,
	input  wire [17:0] b,
	output wire [37:0] z,

	(* clkbuf_sink *)
	input  wire        clk,
	input  wire        reset,

	input  wire [ 2:0] feedback,
	input  wire        load_acc,
	input  wire        unsigned_a,
	input  wire        unsigned_b,

	input  wire        f_mode,
	input  wire [ 2:0] output_select,
	input  wire        saturate_enable,
	input  wire [ 5:0] shift_right,
	input  wire        round,
	input  wire        subtract,
	input  wire        register_inputs
);

	parameter [79:0] MODE_BITS = 80'd0;

	localparam [19:0] COEFF_0 = MODE_BITS[19:0];
	localparam [19:0] COEFF_1 = MODE_BITS[39:20];
	localparam [19:0] COEFF_2 = MODE_BITS[59:40];
	localparam [19:0] COEFF_3 = MODE_BITS[79:60];

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a),
		.b(b),
		.acc_fir(6'b0),
		.z(z),
		.dly_b(),

		.f_mode(f_mode),

		.feedback(feedback),
		.load_acc(load_acc),

		.unsigned_a(unsigned_a),
		.unsigned_b(unsigned_b),

		.clk(clk),
		.reset(reset),

		.output_select(output_select),      // registered output: ACCout (5)
		.saturate_enable(saturate_enable),
		.shift_right(shift_right),
		.round(round),
		.subtract(subtract),
		.register_inputs(register_inputs)   // registered inputs
	);

`ifdef SDF_SIM
	specify
		(posedge clk => (z +: a)) = 0;
		(posedge clk => (z +: b)) = 0;
		$setuphold(posedge clk, a, 0, 0);
		$setuphold(posedge clk, b, 0, 0);
		$setuphold(posedge clk, feedback, 0, 0);
		$setuphold(posedge clk, load_acc, 0, 0);
		$setuphold(posedge clk, subtract, 0, 0);
	endspecify
`endif

endmodule

module dsp_t1_20x18x64_cfg_ports (
	input  wire [19:0] a_i,
	input  wire [17:0] b_i,
	input  wire [ 5:0] acc_fir_i,
	output wire [37:0] z_o,
	output wire [17:0] dly_b_o,

	(* clkbuf_sink *)
	input  wire        clock_i,
	input  wire        reset_i,

	input  wire [ 2:0] feedback_i,
	input  wire        load_acc_i,
	input  wire        unsigned_a_i,
	input  wire        unsigned_b_i,

	input  wire [ 2:0] output_select_i,
	input  wire        saturate_enable_i,
	input  wire [ 5:0] shift_right_i,
	input  wire        round_i,
	input  wire        subtract_i,
	input  wire        register_inputs_i
);

	parameter [19:0] COEFF_0 = 20'd0;
	parameter [19:0] COEFF_1 = 20'd0;
	parameter [19:0] COEFF_2 = 20'd0;
	parameter [19:0] COEFF_3 = 20'd0;

	QL_DSP2 #(
		.MODE_BITS({COEFF_3, COEFF_2, COEFF_1, COEFF_0})
	) dsp (
		.a(a_i),
		.b(b_i),
		.z(z_o),
		.dly_b(dly_b_o),

		.f_mode(1'b0),  // 20x18x64 DSP

		.acc_fir(acc_fir_i),
		.feedback(feedback_i),
		.load_acc(load_acc_i),

		.unsigned_a(unsigned_a_i),
		.unsigned_b(unsigned_b_i),

		.clk(clock_i),
		.reset(reset_i),

		.saturate_enable(saturate_enable_i),
		.output_select(output_select_i),
		.round(round_i),
		.shift_right(shift_right_i),
		.subtract(subtract_i),
		.register_inputs(register_inputs_i)
	);
endmodule

module dsp_t1_10x9x32_cfg_ports (
	input  wire [ 9:0] a_i,
	input  wire [ 8:0] b_i,
	input  wire [ 5:0] acc_fir_i,
	output wire [18:0] z_o,
	output wire [ 8:0] dly_b_o,

	(* clkbuf_sink *)
	input  wire        clock_i,
	input  wire        reset_i,

	input  wire [ 2:0] feedback_i,
	input  wire        load_acc_i,
	input  wire        unsigned_a_i,
	input  wire        unsigned_b_i,

	input  wire [ 2:0] output_select_i,
	input  wire        saturate_enable_i,
	input  wire [ 5:0] shift_right_i,
	input  wire        round_i,
	input  wire        subtract_i,
	input  wire        register_inputs_i
);

	parameter [9:0] COEFF_0 = 10'd0;
	parameter [9:0] COEFF_1 = 10'd0;
	parameter [9:0] COEFF_2 = 10'd0;
	parameter [9:0] COEFF_3 = 10'd0;

	wire [18:0] z_rem;
	wire [8:0] dly_b_rem;

	QL_DSP2 #(
		.MODE_BITS({10'd0, COEFF_3,
					10'd0, COEFF_2,
					10'd0, COEFF_1,
					10'd0, COEFF_0})
	) dsp (
		.a({10'd0, a_i}),
		.b({9'd0, b_i}),
		.z({z_rem, z_o}),
		.dly_b({dly_b_rem, dly_b_o}),

		.f_mode(1'b1),  // 10x9x32 DSP

		.acc_fir(acc_fir_i),
		.feedback(feedback_i),
		.load_acc(load_acc_i),

		.unsigned_a(unsigned_a_i),
		.unsigned_b(unsigned_b_i),

		.clk(clock_i),
		.reset(reset_i),

		.saturate_enable(saturate_enable_i),
		.output_select(output_select_i),
		.round(round_i),
		.shift_right(shift_right_i),
		.subtract(subtract_i),
		.register_inputs(register_inputs_i)
	);
endmodule

module dsp_t1_sim_cfg_ports # (
	parameter NBITS_ACC  = 64,
	parameter NBITS_A    = 20,
	parameter NBITS_B    = 18,
	parameter NBITS_Z    = 38
)(
	input  wire [NBITS_A-1:0] a_i,
	input  wire [NBITS_B-1:0] b_i,
	output wire [NBITS_Z-1:0] z_o,
	output reg  [NBITS_B-1:0] dly_b_o,

	input  wire [5:0]         acc_fir_i,
	input  wire [2:0]         feedback_i,
	input  wire               load_acc_i,

	input  wire               unsigned_a_i,
	input  wire               unsigned_b_i,

	input  wire               clock_i,
	input  wire               s_reset,

	input  wire               saturate_enable_i,
	input  wire [2:0]         output_select_i,
	input  wire               round_i,
	input  wire [5:0]         shift_right_i,
	input  wire               subtract_i,
	input  wire               register_inputs_i,
	input  wire [NBITS_A-1:0] coef_0_i,
	input  wire [NBITS_A-1:0] coef_1_i,
	input  wire [NBITS_A-1:0] coef_2_i,
	input  wire [NBITS_A-1:0] coef_3_i
);

// FIXME: The version of Icarus Verilog from Conda seems not to recognize the
// $error macro. Disable this sanity check for now because of that.


	// Input registers
	reg  [NBITS_A-1:0]  r_a;
	reg  [NBITS_B-1:0]  r_b;
	reg  [5:0]          r_acc_fir;
	reg                 r_unsigned_a;
	reg                 r_unsigned_b;
	reg                 r_load_acc;
	reg  [2:0]          r_feedback;
	reg  [5:0]          r_shift_d1;
	reg  [5:0]          r_shift_d2;
	reg         r_subtract;
	reg         r_sat;
	reg         r_rnd;
	reg [NBITS_ACC-1:0] acc;

	initial begin
		r_a          <= 0;
		r_b          <= 0;

		r_acc_fir    <= 0;
		r_unsigned_a <= 0;
		r_unsigned_b <= 0;
		r_feedback   <= 0;
		r_shift_d1   <= 0;
		r_shift_d2   <= 0;
		r_subtract   <= 0;
		r_load_acc   <= 0;
		r_sat        <= 0;
		r_rnd        <= 0;
	end

	always @(posedge clock_i or posedge s_reset) begin
		if (s_reset) begin

			r_a <= 'h0;
			r_b <= 'h0;

			r_acc_fir    <= 0;
			r_unsigned_a <= 0;
			r_unsigned_b <= 0;
			r_feedback   <= 0;
			r_shift_d1   <= 0;
			r_shift_d2   <= 0;
			r_subtract   <= 0;
			r_load_acc   <= 0;
			r_sat    <= 0;
			r_rnd    <= 0;

		end else begin

			r_a <= a_i;
			r_b <= b_i;

			r_acc_fir    <= acc_fir_i;
			r_unsigned_a <= unsigned_a_i;
			r_unsigned_b <= unsigned_b_i;
			r_feedback   <= feedback_i;
			r_shift_d1   <= shift_right_i;
			r_shift_d2   <= r_shift_d1;
			r_subtract   <= subtract_i;
			r_load_acc   <= load_acc_i;
			r_sat    <= r_sat;
			r_rnd    <= r_rnd;

		end
	end

	// Registered / non-registered input path select
	wire [NBITS_A-1:0]  a = register_inputs_i ? r_a : a_i;
	wire [NBITS_B-1:0]  b = register_inputs_i ? r_b : b_i;

	wire [5:0] acc_fir = register_inputs_i ? r_acc_fir : acc_fir_i;
	wire       unsigned_a = register_inputs_i ? r_unsigned_a : unsigned_a_i;
	wire       unsigned_b = register_inputs_i ? r_unsigned_b : unsigned_b_i;
	wire [2:0] feedback   = register_inputs_i ? r_feedback   : feedback_i;
	wire       load_acc   = register_inputs_i ? r_load_acc   : load_acc_i;
	wire       subtract   = register_inputs_i ? r_subtract   : subtract_i;
	wire       sat    = register_inputs_i ? r_sat : saturate_enable_i;
	wire       rnd    = register_inputs_i ? r_rnd : round_i;

	// Shift right control
	wire [5:0] shift_d1 = register_inputs_i ? r_shift_d1 : shift_right_i;
	wire [5:0] shift_d2 = output_select_i[1] ? shift_d1 : r_shift_d2;

	// Multiplier
	wire unsigned_mode = unsigned_a & unsigned_b;
	wire [NBITS_A-1:0] mult_a;
	assign mult_a = (feedback == 3'h0) ?   a :
					(feedback == 3'h1) ?   a :
					(feedback == 3'h2) ?   a :
					(feedback == 3'h3) ?   acc[NBITS_A-1:0] :
					(feedback == 3'h4) ?   coef_0_i :
					(feedback == 3'h5) ?   coef_1_i :
					(feedback == 3'h6) ?   coef_2_i :
					   coef_3_i;    // if feedback == 3'h7

	wire [NBITS_B-1:0] mult_b = (feedback == 2'h2) ? {NBITS_B{1'b0}}  : b;

	wire [NBITS_A-1:0] mult_sgn_a = mult_a[NBITS_A-1];
	wire [NBITS_A-1:0] mult_mag_a = (mult_sgn_a && !unsigned_a) ? (~mult_a + 1) : mult_a;
	wire [NBITS_B-1:0] mult_sgn_b = mult_b[NBITS_B-1];
	wire [NBITS_B-1:0] mult_mag_b = (mult_sgn_b && !unsigned_b) ? (~mult_b + 1) : mult_b;

	wire [NBITS_A+NBITS_B-1:0] mult_mag = mult_mag_a * mult_mag_b;
	wire mult_sgn = (mult_sgn_a && !unsigned_a) ^ (mult_sgn_b && !unsigned_b);

	wire [NBITS_A+NBITS_B-1:0] mult = (unsigned_a && unsigned_b) ?
		(mult_a * mult_b) : (mult_sgn ? (~mult_mag + 1) : mult_mag);

	// Sign extension
	wire [NBITS_ACC-1:0] mult_xtnd = unsigned_mode ?
		{{(NBITS_ACC-NBITS_A-NBITS_B){1'b0}},                    mult[NBITS_A+NBITS_B-1:0]} :
		{{(NBITS_ACC-NBITS_A-NBITS_B){mult[NBITS_A+NBITS_B-1]}}, mult[NBITS_A+NBITS_B-1:0]};

	// Adder
	wire [NBITS_ACC-1:0] acc_fir_int = unsigned_a ? {{(NBITS_ACC-NBITS_A){1'b0}},         a} :
													{{(NBITS_ACC-NBITS_A){a[NBITS_A-1]}}, a} ;

	wire [NBITS_ACC-1:0] add_a = (subtract) ? (~mult_xtnd + 1) : mult_xtnd;
	wire [NBITS_ACC-1:0] add_b = (feedback_i == 3'h0) ? acc :
								 (feedback_i == 3'h1) ? {{NBITS_ACC}{1'b0}} : (acc_fir_int << acc_fir);

	wire [NBITS_ACC-1:0] add_o = add_a + add_b;

	// Accumulator
	initial acc <= 0;

	always @(posedge clock_i or posedge s_reset)
		if (s_reset) acc <= 'h0;
		else begin
			if (load_acc)
				acc <= add_o;
			else
				acc <= acc;
		end

	// Adder/accumulator output selection
	wire [NBITS_ACC-1:0] acc_out = (output_select_i[1]) ? add_o : acc;

	// Round, shift, saturate
	wire [NBITS_ACC-1:0] acc_rnd = (rnd && (shift_right_i != 0)) ? (acc_out + ({{(NBITS_ACC-1){1'b0}}, 1'b1} << (shift_right_i - 1))) :
																	acc_out;

	wire [NBITS_ACC-1:0] acc_shr = (unsigned_mode) ? (acc_rnd  >> shift_right_i) :
													 (acc_rnd >>> shift_right_i);

	wire [NBITS_ACC-1:0] acc_sat_u = (acc_shr[NBITS_ACC-1:NBITS_Z] != 0) ? {{(NBITS_ACC-NBITS_Z){1'b0}},{NBITS_Z{1'b1}}} :
																		   {{(NBITS_ACC-NBITS_Z){1'b0}},{acc_shr[NBITS_Z-1:0]}};

	wire [NBITS_ACC-1:0] acc_sat_s = ((|acc_shr[NBITS_ACC-1:NBITS_Z-1] == 1'b0) ||
									  (&acc_shr[NBITS_ACC-1:NBITS_Z-1] == 1'b1)) ? {{(NBITS_ACC-NBITS_Z){1'b0}},{acc_shr[NBITS_Z-1:0]}} :
																				   {{(NBITS_ACC-NBITS_Z){1'b0}},{acc_shr[NBITS_ACC-1],{NBITS_Z-1{~acc_shr[NBITS_ACC-1]}}}};

	wire [NBITS_ACC-1:0] acc_sat = (sat) ? ((unsigned_mode) ? acc_sat_u : acc_sat_s) : acc_shr;

	// Output signals
	wire [NBITS_Z-1:0]  z0;
	reg  [NBITS_Z-1:0]  z1;
	wire [NBITS_Z-1:0]  z2;

	assign z0 = mult_xtnd[NBITS_Z-1:0];
	assign z2 = acc_sat[NBITS_Z-1:0];

	initial z1 <= 0;

	always @(posedge clock_i or posedge s_reset)
		if (s_reset)
			z1 <= 0;
		else begin
			z1 <= (output_select_i == 3'b100) ? z0 : z2;
		end

	// Output mux
	assign z_o = (output_select_i == 3'h0) ?   z0 :
				 (output_select_i == 3'h1) ?   z2 :
				 (output_select_i == 3'h2) ?   z2 :
				 (output_select_i == 3'h3) ?   z2 :
				 (output_select_i == 3'h4) ?   z1 :
				 (output_select_i == 3'h5) ?   z1 :
				 (output_select_i == 3'h6) ?   z1 :
						   z1;  // if output_select_i == 3'h7

	// B input delayed passthrough
	initial dly_b_o <= 0;

	always @(posedge clock_i or posedge s_reset)
		if (s_reset)
			dly_b_o <= 0;
		else
			dly_b_o <= b_i;

endmodule