Added generic/vendor-specific primitive selector for simulation.

11 files changed, 552 insertions, 21 deletions

diff --git a/src/rtl/modexpa7_factor.v b/src/rtl/modexpa7_factor.v
index 7d8da72..b3ad130 100644
--- a/src/rtl/modexpa7_factor.v
+++ b/src/rtl/modexpa7_factor.v
@@ -276,14 +276,15 @@ module modexpa7_factor #
 			/* mask borrow into the very first word */

 		sub_b_in_mask <= (fsm_next_state == FSM_STATE_CALC_3) ? 1'b1 : 1'b0;

 		

-	ip_sub32 sub_inst

+	modexpa7_pe_sub sub_inst

 	(

 		.clk		(clk),

+		.ce		(1'b1),

 		.a			(f1_data_in),

 		.b			(n_bram_out_dly),

-		.c_in		(sub_b_in),

-		.s			(sub_d),

-		.c_out	(sub_b_out)

+		.b_in		(sub_b_in),

+		.d			(sub_d),

+		.b_out	(sub_b_out)

 	);

 

 

diff --git a/src/rtl/pe/artix7/adder32_artix7.v b/src/rtl/pe/artix7/adder32_artix7.v
new file mode 100644
index 0000000..6da5bd9
--- /dev/null
+++ b/src/rtl/pe/artix7/adder32_artix7.v
@@ -0,0 +1,97 @@
+//------------------------------------------------------------------------------
+//
+// adder32_artix7.v
+// -----------------------------------------------------------------------------
+// Hardware (Artix-7 DSP48E1) 32-bit adder.

+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2016-2017, NORDUnet A/S
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may be
+//   used to endorse or promote products derived from this software without
+//   specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//------------------------------------------------------------------------------

+

+module adder32_artix7

+	(

+		input					clk,		// clock

+		input					ce,		// clock enable

+		input		[31: 0]	a,			// operand input

+		input		[31: 0]	b,			// operand input

+		output	[31: 0]	s,			// sum output

+		input					c_in,		// carry input

+		output				c_out		// carry output

+	);

+	

+		//

+		// Lower and higher parts of operand

+		//

+	wire	[17: 0]	bl = b[17: 0];

+	wire	[13: 0]	bh = b[31:18];

+

+		

+		//

+		// DSP48E1 Slice

+		//

+		

+		/* Operation Mode */

+	wire	[ 3: 0]	dsp48e1_alumode	= 4'b0000;

+	wire	[ 6: 0]	dsp48e1_opmode		= 7'b0110011;

+		

+		/* Internal Product */

+	wire	[47: 0]	p_int;

+

+	dsp48e1_wrapper dsp_adder

+	(

+		.clk			(clk),

+		

+		.ce			(ce),

+		

+		.carry		(c_in),

+		

+		.alumode		(dsp48e1_alumode),

+		.opmode		(dsp48e1_opmode),

+		

+		.a				({{16{1'b0}}, bh}),

+		.b				(bl),

+		.c				({{16{1'b0}}, a}),

+		

+		.p				(p_int)

+	);

+

+		//

+		// Output Mapping

+		//

+	assign s 		= p_int[31: 0];

+	assign c_out	= p_int[32];

+

+

+endmodule

+

+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------

diff --git a/src/rtl/pe/artix7/dsp48e1_wrapper.v b/src/rtl/pe/artix7/dsp48e1_wrapper.v
new file mode 100644
index 0000000..11a21bc
--- /dev/null
+++ b/src/rtl/pe/artix7/dsp48e1_wrapper.v
@@ -0,0 +1,159 @@
+//------------------------------------------------------------------------------
+//
+// dsp48e1_wrapper.v
+// -----------------------------------------------------------------------------
+// Hardware (Artix-7 DSP48E1) tile wrapper.

+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2016, NORDUnet A/S
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may be
+//   used to endorse or promote products derived from this software without
+//   specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//------------------------------------------------------------------------------

+

+module dsp48e1_wrapper

+	(

+		input					clk,

+		

+		input					ce,

+		

+		input		[ 6: 0]	opmode,

+		input		[ 3: 0]	alumode,

+		

+		input					carry,

+		

+		input		[29: 0]	a,

+		input		[17: 0]	b,

+		input		[47: 0]	c,

+		

+		output	[47: 0]	p

+	);

+	

+	

+		//

+		// Tile instantiation

+		//

+	DSP48E1 #
+	(
+		.AREG						(0),
+		.BREG						(0),
+		.CREG						(0),
+		.DREG						(0),
+		.MREG						(0),
+		.PREG						(1),
+		.ADREG					(0),

+		
+		.ACASCREG				(0),
+		.BCASCREG				(0),
+		.ALUMODEREG				(0),
+		.INMODEREG				(0),
+		.OPMODEREG				(0),
+		.CARRYINREG				(0),
+		.CARRYINSELREG			(0),
+
+		.A_INPUT					("DIRECT"),
+		.B_INPUT					("DIRECT"),

+		
+		.USE_DPORT				("FALSE"),
+		.USE_MULT				("DYNAMIC"),
+		.USE_SIMD				("ONE48"),
+
+		.USE_PATTERN_DETECT	("NO_PATDET"),
+		.SEL_PATTERN			("PATTERN"),
+		.SEL_MASK				("MASK"),
+		.PATTERN					(48'h000000000000),
+		.MASK						(48'h3fffffffffff),
+		.AUTORESET_PATDET		("NO_RESET")
+	)
+	DSP48E1_inst
+	(
+		.CLK					(clk),
+
+		.RSTA					(1'b0),
+		.RSTB					(1'b0),
+		.RSTC					(1'b0),
+		.RSTD					(1'b0),
+		.RSTM					(1'b0),
+		.RSTP					(1'b0),
+
+		.RSTCTRL				(1'b0),
+		.RSTINMODE			(1'b0),
+		.RSTALUMODE			(1'b0),
+		.RSTALLCARRYIN		(1'b0),
+
+		.CEA1					(1'b0),
+		.CEA2					(1'b0),
+		.CEB1					(1'b0),
+		.CEB2					(1'b0),
+		.CEC					(1'b0),
+		.CED					(1'b0),
+		.CEM					(1'b0),
+		.CEP					(ce),
+		.CEAD					(1'b0),
+		.CEALUMODE			(1'b0),
+		.CEINMODE			(1'b0),
+
+		.CECTRL				(1'b0),
+		.CECARRYIN			(1'b0),
+
+		.A						(a),
+		.B						(b),
+		.C						(c),
+		.D						({25{1'b1}}),
+		.P						(p),
+
+		.CARRYIN				(carry),
+		.CARRYOUT			(),
+		.CARRYINSEL			(3'b000),
+
+		.CARRYCASCIN		(1'b0),
+		.CARRYCASCOUT		(),
+
+		.PATTERNDETECT		(),
+		.PATTERNBDETECT	(),
+
+		.OPMODE				(opmode),
+		.ALUMODE				(alumode),
+		.INMODE				(5'b00000),
+
+		.MULTSIGNIN			(1'b0),
+		.MULTSIGNOUT		(),
+
+		.UNDERFLOW			(),
+		.OVERFLOW			(),
+
+		.ACIN					(30'd0),
+		.BCIN					(18'd0),
+		.PCIN					(48'd0),
+
+		.ACOUT				(),
+		.BCOUT				(),
+		.PCOUT				()
+  );
+

+endmodule

diff --git a/src/rtl/pe/artix7/subtractor32_artix7.v b/src/rtl/pe/artix7/subtractor32_artix7.v
new file mode 100644
index 0000000..76e10c0
--- /dev/null
+++ b/src/rtl/pe/artix7/subtractor32_artix7.v
@@ -0,0 +1,95 @@
+//------------------------------------------------------------------------------

+//

+// subtractor32_artix7.v

+// -----------------------------------------------------------------------------

+// Hardware (Artix-7 DSP48E1) 32-bit subtractor.

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2016-2017, NORDUnet A/S

+//

+// Redistribution and use in source and binary forms, with or without

+// modification, are permitted provided that the following conditions are met:

+//

+// - Redistributions of source code must retain the above copyright notice,

+//   this list of conditions and the following disclaimer.

+//

+// - Redistributions in binary form must reproduce the above copyright notice,

+//   this list of conditions and the following disclaimer in the documentation

+//   and/or other materials provided with the distribution.

+//

+// - Neither the name of the NORDUnet nor the names of its contributors may be

+//   used to endorse or promote products derived from this software without

+//   specific prior written permission.

+//

+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

+// POSSIBILITY OF SUCH DAMAGE.

+//

+//------------------------------------------------------------------------------

+

+module subtractor32_artix7

+	(

+		input					clk,

+		input					ce,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		output	[31: 0]	d,

+		input					b_in,

+		output				b_out	

+	);

+

+		//

+		// Lower and higher parts of operand

+		//

+	wire	[17: 0]	bl = b[17: 0];

+	wire	[13: 0]	bh = b[31:18];

+	

+		//

+		// DSP48E1 Slice

+		//

+		

+		/* Operation Mode */

+	wire	[ 3: 0]	dsp48e1_alumode	= 4'b0011;

+	wire	[ 6: 0]	dsp48e1_opmode		= 7'b0110011;

+

+		/* Internal Product */	

+	wire	[47: 0]	p_int;

+	

+	dsp48e1_wrapper dsp_subtractor

+	(

+		.clk			(clk),

+	

+		.ce			(ce),

+		

+		.carry		(b_in),

+		

+		.alumode		(dsp48e1_alumode),

+		.opmode		(dsp48e1_opmode),

+		

+		.a				({{16{1'b0}}, bh}),

+		.b				(bl),

+		.c				({{16{1'b0}}, a}),

+		

+		.p				(p_int)

+	);

+

+		//

+		// Output Mapping

+		//

+	assign d 		= p_int[31: 0];

+	assign b_out	= p_int[32];

+

+endmodule

+

+//------------------------------------------------------------------------------

+// End-of-File

+//------------------------------------------------------------------------------

diff --git a/src/rtl/pe/generic/adder32_generic.v b/src/rtl/pe/generic/adder32_generic.v
new file mode 100644
index 0000000..10ecfa4
--- /dev/null
+++ b/src/rtl/pe/generic/adder32_generic.v
@@ -0,0 +1,69 @@
+//------------------------------------------------------------------------------
+//
+// adder32_generic.v
+// -----------------------------------------------------------------------------
+// Generic 32-bit adder w/ clock enable.

+//
+// Authors: Pavel Shatov
+//
+// Copyright (c) 2016-2017, NORDUnet A/S
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// - Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// - Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// - Neither the name of the NORDUnet nor the names of its contributors may be
+//   used to endorse or promote products derived from this software without
+//   specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//------------------------------------------------------------------------------

+

+module adder32_generic

+	(

+		input					clk,		// clock

+		input					ce,		// clock enable

+		input		[31: 0]	a,			// operand input

+		input		[31: 0]	b,			// operand input

+		output	[31: 0]	s,			// sum output

+		input					c_in,		// carry input

+		output				c_out		// carry output

+	);

+	
+		//
+		// Sum
+		//
+	reg	[32: 0]	s_int;

+	

+	always @(posedge clk)

+		if (ce) s_int <= {1'b0, a} + {1'b0, b} + {{32{1'b0}}, c_in};

+		

+		//

+		// Output

+		//

+	assign s = s_int[31:0];

+	assign c_out = s_int[32];

+	

+		

+endmodule

+

+//------------------------------------------------------------------------------
+// End-of-File
+//------------------------------------------------------------------------------

diff --git a/src/rtl/pe/generic/subtractor32_generic.v b/src/rtl/pe/generic/subtractor32_generic.v
new file mode 100644
index 0000000..3e78715
--- /dev/null
+++ b/src/rtl/pe/generic/subtractor32_generic.v
@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------

+//

+// subtractor32_generic.v

+// -----------------------------------------------------------------------------

+// Generic 32-bit subtractor w/ clock enable.

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2016-2017, NORDUnet A/S

+//

+// Redistribution and use in source and binary forms, with or without

+// modification, are permitted provided that the following conditions are met:

+//

+// - Redistributions of source code must retain the above copyright notice,

+//   this list of conditions and the following disclaimer.

+//

+// - Redistributions in binary form must reproduce the above copyright notice,

+//   this list of conditions and the following disclaimer in the documentation

+//   and/or other materials provided with the distribution.

+//

+// - Neither the name of the NORDUnet nor the names of its contributors may be

+//   used to endorse or promote products derived from this software without

+//   specific prior written permission.

+//

+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

+// POSSIBILITY OF SUCH DAMAGE.

+//

+//------------------------------------------------------------------------------

+

+module subtractor32_generic

+	(

+		input					clk,

+		input					ce,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		output	[31: 0]	d,

+		input					b_in,

+		output				b_out	

+	);

+

+

+		//
+		// Difference
+		//
+	reg	[32: 0]	d_int;

+	

+	always @(posedge clk)

+		if (ce) d_int <= {1'b0, a} - {1'b0, b} - {{32{1'b0}}, b_in};

+	

+	

+		//

+		// Output

+		//

+	assign d = d_int[31:0];

+	assign b_out = d_int[32];

+	

+

+endmodule

+

+//------------------------------------------------------------------------------

+// End-of-File

+//------------------------------------------------------------------------------

diff --git a/src/rtl/pe/modexpa7_pe_add.v b/src/rtl/pe/modexpa7_pe_add.v
index 9cde591..467be5d 100644
--- a/src/rtl/pe/modexpa7_pe_add.v
+++ b/src/rtl/pe/modexpa7_pe_add.v
@@ -47,14 +47,27 @@ module modexpa7_pe_add
 		output				c_out

 	);

 	

-	reg	[32: 0]	s_reg;

 	

-	assign s			= s_reg[31: 0];

-	assign c_out	= s_reg[32];

-	

-	always @(posedge clk)

-		//

-		if (ce) s_reg <= {1'b0, a} + {1'b0, b} + {32'd0, c_in};

+		//
+		// Include Primitive Selector
+		//
+	`include "modexpa7_pe_settings.v"
+
+
+		//
+		// Instantiate Vendor/Generic Primitive
+		//
+	`ADDER32_PRIMITIVE adder32_inst
+	(
+		.clk(clk),

+		.ce(ce),
+		.a(a),
+		.b(b),
+		.s(s),
+		.c_in(c_in),
+		.c_out(c_out)
+	);
+

 

 endmodule

 

diff --git a/src/rtl/pe/modexpa7_pe_settings.v b/src/rtl/pe/modexpa7_pe_settings.v
new file mode 100644
index 0000000..97b5b89
--- /dev/null
+++ b/src/rtl/pe/modexpa7_pe_settings.v
@@ -0,0 +1,13 @@
+//`define USE_VENDOR_PRIMITIVES

+

+`ifdef USE_VENDOR_PRIMITIVES

+

+`define ADDER32_PRIMITIVE			adder32_artix7

+`define SUBTRACTOR32_PRIMITIVE	subtractor32_artix7

+

+`else

+

+`define ADDER32_PRIMITIVE			adder32_generic

+`define SUBTRACTOR32_PRIMITIVE	subtractor32_generic

+

+`endif

diff --git a/src/rtl/pe/modexpa7_pe_sub.v b/src/rtl/pe/modexpa7_pe_sub.v
index 85c5f65..2da4900 100644
--- a/src/rtl/pe/modexpa7_pe_sub.v
+++ b/src/rtl/pe/modexpa7_pe_sub.v
@@ -47,14 +47,27 @@ module modexpa7_pe_sub
 		output				b_out

 	);

 	

-	reg	[32: 0]	d_reg;

 	

-	assign d			= d_reg[31: 0];

-	assign b_out	= d_reg[32];

-	

-	always @(posedge clk)

-		//

-		if (ce) d_reg <= {1'b0, a} - {1'b0, b} - {32'd0, b_in};

+		//
+		// Include Primitive Selector
+		//
+	`include "modexpa7_pe_settings.v"
+
+
+		//
+		// Instantiate Vendor/Generic Primitive
+		//
+	`SUBTRACTOR32_PRIMITIVE subtractor32_inst
+	(
+		.clk(clk),

+		.ce(ce),
+		.a(a),
+		.b(b),
+		.d(d),
+		.b_in(b_in),
+		.b_out(b_out)
+	);

+	
 

 endmodule

 

diff --git a/src/tb/tb_factor.v b/src/tb/tb_factor.v
index b53f7d8..d0e92dc 100644
--- a/src/tb/tb_factor.v
+++ b/src/tb/tb_factor.v
@@ -258,10 +258,10 @@ module tb_factor;
 			tb_n_wren	= 1;	// start filling memories
 			n_shreg		= n;	// preload shift register

 			//
-			for (w=0; w<NUM_WORDS_512; w=w+1) begin				// write all words
+			for (w=0; w<NUM_WORDS_384; w=w+1) begin				// write all words
 				tb_n_addr	= w[3:0];									// set address
 				tb_n_data	= n_shreg[31:0];							// set data
-				n_shreg		= {{32{1'bX}}, n_shreg[511:32]};		// update shift register
+				n_shreg		= {{32{1'bX}}, n_shreg[383:32]};		// update shift register
 				#10;															// wait for 1 clock tick
 			end
 			//
diff --git a/src/tb/tb_systolic_multiplier.v b/src/tb/tb_systolic_multiplier.v
index a6380e5..21e319a 100644
--- a/src/tb/tb_systolic_multiplier.v
+++ b/src/tb/tb_systolic_multiplier.v
@@ -537,9 +537,9 @@ module tb_systolic_multiplier;
 		

 	endtask
 

-

 endmodule

 

+

 //======================================================================

 // End of file

 //======================================================================