test with larger data width (38b0018a) · Commits · Elphel / x393

dct_tests_04.sav

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		[*]
		[*] GTKWave Analyzer v3.3.78 (w)1999-2016 BSI
		[*] Wed Dec 13 06:00:34 2017
		[*]
		[dumpfile] "/home/eyesis/nc393/elphel393/fpga-elphel/x393_branch_dct/simulation/dct_tests_04-20171212192023266.fst"
		[dumpfile_mtime] "Wed Dec 13 02:20:23 2017"
		[dumpfile_size] 219185
		[savefile] "/home/eyesis/nc393/elphel393/fpga-elphel/x393_branch_dct/dct_tests_04.sav"
		[timestart] 1588000
		[size] 1814 1171
		[pos] 0 40
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		[treeopen] dct_tests_03.
		[treeopen] dct_tests_03.dtt_iv_8x8_i.
		[treeopen] dct_tests_03.dtt_iv_8x8r_i.
		[sst_width] 318
		[signals_width] 284
		[sst_expanded] 1
		[sst_vpaned_height] 344
		@420
		dct_tests_03.i
		dct_tests_03.i1
		dct_tests_03.j
		@28
		dct_tests_03.CLK
		dct_tests_03.RST
		[color] 2
		dct_tests_03.start
		[color] 2
		dct_tests_03.start2
		@22
		dct_tests_03.mode_in[1:0]
		@8420
		dct_tests_03.x_in_2d[24:0]
		@22
		dct_tests_03.mode_out[1:0]
		@8420
		dct_tests_03.d_out_2dr[24:0]
		@800200
		-dtt_iv8x8_direct
		@28
		dct_tests_03.dtt_iv_8x8_i.rst
		dct_tests_03.dtt_iv_8x8_i.clk
		dct_tests_03.dtt_iv_8x8_i.start
		@22
		dct_tests_03.dtt_iv_8x8_i.mode[1:0]
		@28
		dct_tests_03.dtt_iv_8x8_i.pre_last_in
		dct_tests_03.dtt_iv_8x8_i.pre_busy
		@c00200
		-debug
		@28
		dct_tests_03.dtt_iv_8x8_i.transpose_start
		@22
		dct_tests_03.dtt_iv_8x8_i.transpose_debug_di[7:0]
		@8022
		dct_tests_03.dtt_iv_8x8_i.transpose_debug_di[7:0]
		@c00022
		dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(1)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(2)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(3)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(4)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(5)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(6)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(7)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		@1401200
		-group_end
		@c08022
		dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(1)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(2)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(3)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(4)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(5)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(6)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		(7)dct_tests_03.dtt_iv_8x8_i.transpose_wa[7:0]
		@1401200
		-group_end
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.transpose_we[1:0]
		dct_tests_03.dtt_iv_8x8_i.pre_dsth
		@8022
		dct_tests_03.dtt_iv_8x8_i.transpose_cntr[6:0]
		@22
		dct_tests_03.dtt_iv_8x8_i.transpose_ra[7:0]
		@28
		dct_tests_03.dtt_iv_8x8_i.dctv_start_0_r
		dct_tests_03.dtt_iv_8x8_i.dctv_start_1_r
		@800028
		dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		(1)dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		@1001200
		-group_end
		@c00028
		[color] 2
		dct_tests_03.dtt_iv_8x8_i.dctv_out_we[1:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.dctv_out_we[1:0]
		(1)dct_tests_03.dtt_iv_8x8_i.dctv_out_we[1:0]
		@1401200
		-group_end
		@28
		dct_tests_03.dtt_iv_8x8_i.pre_dstv
		@200
		-alt
		@28
		dct_tests_03.dtt_iv_8x8_i.dstv
		dct_tests_03.dtt_iv_8x8_i.out_sel
		dct_tests_03.dtt_iv_8x8_i.out_run
		@22
		dct_tests_03.dtt_iv_8x8_i.out_cntr[6:0]
		@28
		dct_tests_03.dtt_iv_8x8_i.out_sel
		@c00022
		dct_tests_03.dtt_iv_8x8_i.out_wa[3:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.out_wa[3:0]
		(1)dct_tests_03.dtt_iv_8x8_i.out_wa[3:0]
		(2)dct_tests_03.dtt_iv_8x8_i.out_wa[3:0]
		(3)dct_tests_03.dtt_iv_8x8_i.out_wa[3:0]
		@1401200
		-group_end
		@28
		dct_tests_03.dtt_iv_8x8_i.out_we
		dct_tests_03.dtt_iv_8x8_i.sub16
		dct_tests_03.dtt_iv_8x8_i.inc16
		dct_tests_03.dtt_iv_8x8_i.start_out
		@200
		-top
		@22
		dct_tests_03.out_ram_wa[4:0]
		@28
		dct_tests_03.out_ram_cntr
		dct_tests_03.out_ram_wah
		@22
		dct_tests_03.out_wa[3:0]
		@28
		dct_tests_03.out_we
		dct_tests_03.out_ram_ren
		dct_tests_03.out_ram_regen
		@22
		dct_tests_03.out_ram_ra[5:0]
		@28
		dct_tests_03.out_pre_first
		dct_tests_03.out_ram_dv
		@1401200
		-debug
		@22
		dct_tests_03.dtt_iv_8x8_i.mode_out[1:0]
		@28
		dct_tests_03.dtt_iv_8x8_i.pre_busy
		@c00200
		-direct_internal
		@28
		dct_tests_03.dtt_iv_8x8_i.dcth_en0
		dct_tests_03.dtt_iv_8x8_i.dcth_en1
		dct_tests_03.dtt_iv_8x8_i.dcth_start_0_r
		dct_tests_03.dtt_iv_8x8_i.dcth_start_1_r
		@22
		dct_tests_03.dtt_iv_8x8_i.mode[1:0]
		dct_tests_03.dtt_iv_8x8_i.mode_h[1:0]
		dct_tests_03.dtt_iv_8x8_i.mode_h_late[1:0]
		dct_tests_03.dtt_iv_8x8_i.mode_v[1:0]
		dct_tests_03.dtt_iv_8x8_i.mode_out[1:0]
		@28
		dct_tests_03.dtt_iv_8x8_i.dctv_start_0_w
		@22
		dct_tests_03.dtt_iv_8x8_i.dctv_start_1_w
		@800028
		dct_tests_03.dtt_iv_8x8_i.pre2_dsth[1:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.pre2_dsth[1:0]
		(1)dct_tests_03.dtt_iv_8x8_i.pre2_dsth[1:0]
		@1001200
		-group_end
		@200
		-
		@800028
		dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		@28
		(0)dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		(1)dct_tests_03.dtt_iv_8x8_i.pre2_dstv[1:0]
		@800200
		-g3
		@28
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_0_i.start
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_0_i.dst_in
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_0_i.dst_out
		@1000200
		-g3
		@28
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_1_i.start
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_1_i.dst_in
		dct_tests_03.dtt_iv_8x8_i.dct_iv8_1d_pass2_1_i.dst_out
		@200
		-
		@1001200
		-group_end
		@1401200
		-direct_internal
		@1000200
		-dtt_iv8x8_direct
		@800200
		-dtt_iv8x8_inv
		@29
		dct_tests_03.dtt_iv_8x8r_i.clk
		@28
		dct_tests_03.dtt_iv_8x8r_i.start
		dct_tests_03.dtt_iv_8x8r_i.mode[1:0]
		dct_tests_03.dtt_iv_8x8r_i.mode_out[1:0]
		@800200
		-inv_internals
		@200
		-
		@1000200
		-inv_internals
		@200
		-
		@1000200
		-dtt_iv8x8_inv
		@200
		-dbg
		[pattern_trace] 1
		[pattern_trace] 0

dsp/dct_tests_04.tf

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		/*!
		* <b>Module:</b>dct_tests_03
		* @file dct_tests_03.tf
		* @date 2016-12-02
		* @author Andrey Filippov
		*
		* @brief 1d 8-point DCT type IV for lapped mdct 16->8, operates in 16 clock cycles
		* Uses 2 DSP blocks
		*
		* @copyright Copyright (c) 2016 Elphel, Inc.
		*
		* <b>License:</b>
		*
		*dct_tests_03.tf is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation, either version 3 of the License, or
		* (at your option) any later version.
		*
		* dct_tests_03.tf is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program. If not, see <http://www.gnu.org/licenses/> .
		*
		* Additional permission under GNU GPL version 3 section 7:
		* If you modify this Program, or any covered work, by linking or combining it
		* with independent modules provided by the FPGA vendor only (this permission
		* does not extend to any 3-rd party modules, "soft cores" or macros) under
		* different license terms solely for the purpose of generating binary "bitstream"
		* files and/or simulating the code, the copyright holders of this Program give
		* you the right to distribute the covered work without those independent modules
		* as long as the source code for them is available from the FPGA vendor free of
		* charge, and there is no dependence on any encrypted modules for simulating of
		* the combined code. This permission applies to you if the distributed code
		* contains all the components and scripts required to completely simulate it
		* with at least one of the Free Software programs.
		*/
		`timescale 1ns/1ps
		// No saturation here, and no rounding as we do not need to match decoder (be bit-precise), skipping rounding adder
		// will reduce needed resources
		//`define DCT_INPUT_UNITY
		module dct_tests_03 ();
		// parameter fstname="dct_tests_03.fst";
		`ifdef IVERILOG
		`ifdef NON_VDT_ENVIROMENT
		parameter fstname="dct_tests_03.fst";
		`else
		`include "IVERILOG_INCLUDE.v"
		`endif // NON_VDT_ENVIROMENT
		`else // IVERILOG
		`ifdef CVC
		`ifdef NON_VDT_ENVIROMENT
		parameter fstname = "x393.fst";
		`else // NON_VDT_ENVIROMENT
		`include "IVERILOG_INCLUDE.v"
		`endif // NON_VDT_ENVIROMENT
		`else
		parameter fstname = "dct_tests_03.fst";
		`endif // CVC
		`endif // IVERILOG

		parameter CLK_PERIOD = 10; // ns
		parameter WIDTH = 25; //4; // input data width
		parameter OUT_WIDTH = 25; //4; // output data width
		parameter TRANSPOSE_WIDTH = 25; //4; // width of the transpose memory (intermediate results)
		parameter OUT_RSHIFT = 2; // overall right shift of the result from input, aligned by MSB (>=3 will never cause saturation)
		parameter OUT_RSHIFT2 = 0; // overall right shift for the second (vertical) pass

		parameter DCT_GAP = 16; // between runs

		parameter SAME_BITS=4; // (3) to match 24-bit widths

		reg RST = 1'b1;
		reg CLK = 1'b0;
		reg [3:0] phase_in;
		reg [3:0] phase_out;
		reg run_in;
		reg run_out;
		reg run_out_d;

		reg en_x = 0;
		// reg end_x = 0;
		reg [2:0] x_ra;
		wire [2:0] x_wa = phase_in[2:0];


		wire x_we = !phase_in[3] && run_in;
		reg [WIDTH-1:0] x_in;
		reg [WIDTH-1:0] x_in_2d;
		reg [WIDTH-1:0] x_out;
		reg [WIDTH-1:0] x_ram[0:7];
		wire [WIDTH-1:0] x_out_w = x_ram[x_ra];

		reg start = 0;
		reg start2 = 0; // second start for 2d
		reg [1:0] mode_in= 0; // 3; // [0] - vertical pass 0: dct, 1 - dst, [1] - horizontal pass
		wire [1:0] mode_out; // [0] - vertical pass 0: dct, 1 - dst, [1] - horizontal pass

		wire [OUT_WIDTH-1:0] y_dct;
		wire pre2_start_out;
		wire en_out;

		reg y_pre_we;
		reg y_we;
		reg [3:0] phase_y=8;
		reg [2:0] y_wa;
		reg [2:0] y_ra;
		reg y_dv=0;
		reg signed [OUT_WIDTH-1:0] y_ram[0:7];
		wire signed [OUT_WIDTH-1:0] y_out = y_ram[y_ra]; // SuppressThisWarning VEditor - simulation only
		reg signed [WIDTH-1:0] data_in[0:63];
		reg signed [OUT_WIDTH-1:0] data_out[0:63];

		wire pre_last_in_2d; // SuppressThisWarning VEditor - simulation only
		wire pre_first_out_2d; // SuppressThisWarning VEditor - simulation only
		wire pre_busy_2d; // SuppressThisWarning VEditor - simulation only
		wire dv_2d; // SuppressThisWarning VEditor - simulation only
		// wire signed [OUT_WIDTH-1:0] d_out_2d;

		wire pre_last_in_2dr; // SuppressThisWarning VEditor - simulation only
		wire pre_first_out_2dr; // SuppressThisWarning VEditor - simulation only
		wire pre_busy_2dr; // SuppressThisWarning VEditor - simulation only
		wire dv_2dr; // SuppressThisWarning VEditor - simulation only
		wire signed [OUT_WIDTH-1:0] d_out_2dr; // SuppressThisWarning VEditor - simulation only


		integer i,j, i1, ir;
		initial begin
		for (i=0; i<64; i=i+1) begin
		`ifdef DCT_INPUT_UNITY
		data_in[i] = (i[2:0] == (i[5:3] ^ 3'h0)) ? {2'b1,{WIDTH-2{1'b0}}} : 0;
		ir= (i[2:0] == (i[5:3] ^ 3'h1)) ? {2'b1,{WIDTH-2{1'b0}}} : 0;
		data_in[i] = ir;
		`else
		ir = $random;
		data_in[i] = ((i[5:3] == 0) \|\| (i[5:3] == 7) \|\| (i[2:0] == 0) \|\| (i[2:0] == 7))? 0:
		{{SAME_BITS{ir[WIDTH -SAME_BITS - 1]}},ir[WIDTH -SAME_BITS-1:0]};
		`endif
		end
		$display("Input data in line-scan order:");
		for (i=0; i<64; i=i+8) begin
		$display ("%d, %d, %d, %d, %d, %d, %d, %d",data_in[i+0],data_in[i+1],data_in[i+2],data_in[i+3],
		data_in[i+4],data_in[i+5],data_in[i+6],data_in[i+7]);
		end
		$display("");
		$display("Input data - transposed:");
		j=0;
		for (i=0; i < 8; i=i+1) begin
		$display ("%d, %d, %d, %d, %d, %d, %d, %d",data_in[i+ 0],data_in[i+ 8],data_in[i+16],data_in[i+24],
		data_in[i+32],data_in[i+40],data_in[i+48],data_in[i+56]);
		end
		$display("");

		end

		always #(CLK_PERIOD/2) CLK = ~CLK;
		initial begin
		$dumpfile(fstname);
		$dumpvars(0,dct_tests_03); // SuppressThisWarning VEditor
		#100;
		RST = 0;
		#100;
		repeat (10) @(posedge CLK);
		#1 en_x = 1;
		for (i = 0; i < 64; i = i+1) begin
		@(posedge CLK);
		#1;
		x_in = data_in[i]; // >>x_wa;
		if (i==63) begin
		en_x = 0;
		end
		if (&i[2:0]) repeat (8) @(posedge CLK);
		end
		#1 x_in = 0;
		repeat (64) @(posedge CLK);

		$display("");
		$display("output data - transposed:");
		for (i=0; i<64; i=i+8) begin
		$display ("%d, %d, %d, %d, %d, %d, %d, %d",data_out[i+0],data_out[i+1],data_out[i+2],data_out[i+3],
		data_out[i+4],data_out[i+5],data_out[i+6],data_out[i+7]);
		end

		// repeat (64) @(posedge CLK);
		// $finish;
		end

		initial begin
		wait (!RST);
		while (!start) begin
		@(posedge CLK);
		#1;
		end
		for (i1 = 0; i1 < 192; i1 = i1+1) begin
		@(posedge CLK);
		#1;
		x_in_2d = data_in[i1 & 63];
		if ((i1 & 63) == 0) mode_in = mode_in+1;
		start2 = (i1 & 63) == 63;
		end
		for (i1 = 0; i1 < 64; i1 = i1+1) begin
		@(posedge CLK);
		#1;
		start2 = 0;
		x_in_2d = data_in[i1];
		end

		repeat (DCT_GAP) @(posedge CLK);
		#1;
		start2 = 1;
		for (i1 = 0; i1 < 64; i1 = i1+1) begin
		@(posedge CLK);
		#1;
		start2 = 0;
		x_in_2d = data_in[63-i1];
		end

		repeat (300) @(posedge CLK);
		$finish;

		end


		initial j = 0;
		always @ (posedge CLK) begin
		if (y_dv) begin
		//$display (" y[0x%x] => 0x%x %d, j=%d @%t",y_ra,y_out,y_out,j,$time);
		data_out[{j[2:0],j[5:3]}] = y_out; // transpose array
		#1 j = j+1;
		end
		end



		always @ (posedge CLK) begin
		if (RST) run_in <= 0;
		else if (en_x) run_in <= 1;
		else if (phase_in == 15) run_in <= 0;

		if (RST) run_out <= 0;
		else if ((phase_in == 5) \|\| (phase_out==15)) run_out <= run_in;

		if (!run_in) phase_in <= 0;
		else phase_in <= phase_in + 1;

		if (!run_out) phase_out <= 0;
		else phase_out <= phase_out + 1;

		run_out_d <= run_out;

		if (RST) start <= 0;
		else start <= run_out & !run_out_d;

		{y_we,y_pre_we} <= {y_pre_we, en_out};

		if (RST) phase_y <= 8;
		else if (pre2_start_out) phase_y <= 0;
		else if (y_pre_we) phase_y <= phase_y + 1;

		if (RST) y_dv <= 0;
		else if ((phase_y == 6) && y_we) y_dv <= 1;
		else if (y_ra == 7) y_dv <= 0;

		if (!y_dv) y_ra <= 0;
		else y_ra <= y_ra + 1;

		if (y_we) y_ram[y_wa] <= y_dct;


		if (x_we) x_ram[x_wa] <= x_in;

		x_out <= x_out_w;
		//X2-X7-X3-X4-X5-X6-X0-X1--X3-X5-X4--X1-X7-*
		case (phase_out)
		4'h0: x_ra <= 2;
		4'h1: x_ra <= 7;
		4'h2: x_ra <= 3;
		4'h3: x_ra <= 4;
		4'h4: x_ra <= 5;
		4'h5: x_ra <= 6;
		4'h6: x_ra <= 0;
		4'h7: x_ra <= 1;
		4'h8: x_ra <= 'bx;
		4'h9: x_ra <= 3;
		4'ha: x_ra <= 5;
		4'hb: x_ra <= 4;
		4'hc: x_ra <= 'bx;
		4'hd: x_ra <= 6;
		4'he: x_ra <= 7;
		4'hf: x_ra <= 'bx;
		endcase

		case (phase_y[2:0])
		3'h0: y_wa <= 0;
		3'h1: y_wa <= 7;
		3'h2: y_wa <= 4;
		3'h3: y_wa <= 3;
		3'h4: y_wa <= 1;
		3'h5: y_wa <= 6;
		3'h6: y_wa <= 2;
		3'h7: y_wa <= 5;
		endcase

		end

		dtt_iv8_1d #(
		.WIDTH (WIDTH),
		.OUT_WIDTH (OUT_WIDTH),
		.OUT_RSHIFT (OUT_RSHIFT),
		.B_WIDTH (18),
		.A_WIDTH (25),
		.P_WIDTH (48),
		.COSINE_SHIFT (17),
		.COS_01_32 (130441),
		.COS_03_32 (125428),
		.COS_04_32 (121095),
		.COS_05_32 (115595),
		.COS_07_32 (101320),
		.COS_08_32 (92682),
		.COS_09_32 (83151),
		.COS_11_32 (61787),
		.COS_12_32 (50159),
		.COS_13_32 (38048),
		.COS_15_32 (12847)
		) dtt_iv8_1d_i (
		.clk (CLK), // input
		.rst (RST), // input
		.en (run_in), // input
		.dst_in (mode_in[1]), // input
		.d_in (x_out), // input[23:0]
		.start (start), // input
		.dout (y_dct), // output[15:0]
		.pre2_start_out (pre2_start_out), // output reg
		.en_out (en_out), // output reg
		.dst_out (), // output
		.y_index () // output[2:0] reg
		);
		parameter ODEPTH = 5;
		reg signed [OUT_WIDTH-1:0] out_ram[0: ((1<<ODEPTH)-1)]; // [0:31];
		wire signed [OUT_WIDTH-1:0] out_wd;
		wire signed [3:0] out_wa;
		wire out_we;
		wire sub16;
		wire inc16;
		wire start_out;
		reg [ODEPTH-5:0] out_ram_cntr;
		reg [ODEPTH-5:0] out_ram_wah;

		wire [ODEPTH-1:0] out_ram_wa = {out_ram_wah,out_wa};
		reg out_ram_ren;
		reg out_ram_regen;
		reg out_ram_dv;
		wire out_pre_first;
		reg [5:0] out_ram_ra;


		reg signed [OUT_WIDTH-1:0] out_ram_r;
		reg signed [OUT_WIDTH-1:0] out_ram_r2;



		always @ (posedge CLK) begin
		if (RST) out_ram_cntr <= 0;
		else if (inc16) out_ram_cntr <= out_ram_cntr + 1;
		out_ram_wah <= out_ram_cntr - sub16;

		if (out_we) out_ram[out_ram_wa] <= out_wd;

		if (RST) out_ram_ren <= 1'b0;
		else if (start_out) out_ram_ren <= 1'b1;
		else if (&out_ram_ra) out_ram_ren <= 1'b0;

		out_ram_regen <= out_ram_ren;
		out_ram_dv <= out_ram_regen;
		if (!out_ram_ren) out_ram_ra <= 0;
		else out_ram_ra <= out_ram_ra + 1;

		if (out_ram_ren) out_ram_r <= out_ram[out_ram_ra[4:0]];
		if (out_ram_regen) out_ram_r2 <= out_ram_r;

		end

		dly_var #(
		.WIDTH(1),
		.DLY_WIDTH(4)
		) dly_out_pre_first_i (
		.clk (CLK), // input
		.rst (RST), // input
		.dly (4'h1), // input[3:0]
		.din (start_out), // input[0:0]
		.dout (out_pre_first) // output[0:0]
		);


		dtt_iv_8x8_ad #(
		.INPUT_WIDTH (WIDTH),
		.OUT_WIDTH (OUT_WIDTH),
		.OUT_RSHIFT1 (OUT_RSHIFT),
		.OUT_RSHIFT2 (OUT_RSHIFT2),
		.TRANSPOSE_WIDTH (TRANSPOSE_WIDTH),
		.DSP_B_WIDTH (18),
		.DSP_A_WIDTH (25),
		.DSP_P_WIDTH (48)
		) dtt_iv_8x8_i (
		.clk (CLK), // input
		.rst (RST), // input
		.start (start \|\| start2), // input
		.mode (mode_in), // input[1:0]
		.xin (x_in_2d), // input[24:0] signed
		.pre_last_in (pre_last_in_2d), // output reg
		.mode_out (mode_out), // output[1:0] reg
		.pre_busy (pre_busy_2d), // output reg
		.out_wd (out_wd), // output[24:0] reg
		.out_wa (out_wa), // output[3:0] reg
		.out_we (out_we), // output reg
		.sub16 (sub16), // output reg
		.inc16 (inc16), // output reg
		.start_out (start_out) // output reg
		);



		dtt_iv_8x8_obuf #(
		.INPUT_WIDTH (WIDTH),
		.OUT_WIDTH (OUT_WIDTH),
		.OUT_RSHIFT1 (OUT_RSHIFT),
		.OUT_RSHIFT2 (OUT_RSHIFT2),
		.TRANSPOSE_WIDTH (TRANSPOSE_WIDTH),
		.DSP_B_WIDTH (18),
		.DSP_A_WIDTH (25),
		.DSP_P_WIDTH (48)
		) dtt_iv_8x8r_i (
		.clk (CLK), // input
		.rst (RST), // input
		.start (out_pre_first), // pre_first_out_2d), // input
		.mode ({mode_out[0],mode_out[1]}), // input[1:0] // result is transposed
		.xin (out_ram_r2), // d_out_2d), // input[24:0] signed
		.pre_last_in (pre_last_in_2dr), // output reg
		.pre_first_out (pre_first_out_2dr), // output
		.dv (dv_2dr), // output
		.d_out (d_out_2dr), // output[24:0] signed
		.mode_out (), // output[1:0] reg
		.pre_busy (pre_busy_2dr) // output reg
		);


		endmodule