Fixed generic/vendor low-level primitives switch.

8 files changed, 760 insertions, 60 deletions

diff --git a/src/rtl/pe/artix7/dsp48e1_wrapper_ext.v b/src/rtl/pe/artix7/dsp48e1_wrapper_ext.v
new file mode 100644
index 0000000..83fb78c
--- /dev/null
+++ b/src/rtl/pe/artix7/dsp48e1_wrapper_ext.v
@@ -0,0 +1,159 @@
+//------------------------------------------------------------------------------
+//
+// dsp48e1_wrapper_ext.v
+// -----------------------------------------------------------------------------
+// Extended hardware (Artix-7 DSP48E1) tile wrapper.

+//
+// 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 dsp48e1_wrapper_ext #

+	(

+		parameter	AREG		= 1'b0,

+		parameter	PREG		= 1'b0,

+		

+		parameter	A_INPUT	= "DIRECT"

+	)

+	(

+		input					clk,

+		input		[ 6: 0]	opmode,

+		input		[29: 0]	a,

+		input		[17: 0]	b,

+		output	[47: 0]	p,

+		input		[29: 0]	acin,

+		input		[47: 0]	pcin,

+		output	[29: 0]	acout,

+		output	[47: 0]	pcout

+	);

+	

+		//

+		// Tile instantiation

+		//

+	DSP48E1 #
+	(
+		.AREG						(AREG),
+		.BREG						(1'b1),
+		.CREG						(0),
+		.DREG						(0),
+		.MREG						(0),
+		.PREG						(PREG),
+		.ADREG					(0),

+		
+		.ACASCREG				(AREG),
+		.BCASCREG				(1'b1),
+		.ALUMODEREG				(0),
+		.INMODEREG				(0),
+		.OPMODEREG				(0),
+		.CARRYINREG				(0),
+		.CARRYINSELREG			(0),
+
+		.A_INPUT					(A_INPUT),
+		.B_INPUT					("DIRECT"),

+		
+		.USE_DPORT				("FALSE"),
+		.USE_MULT				("MULTIPLY"),
+		.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					(AREG),
+		.CEB1					(1'b0),
+		.CEB2					(1'b1),
+		.CEC					(1'b0),
+		.CED					(1'b0),
+		.CEM					(1'b0),
+		.CEP					(PREG),
+		.CEAD					(1'b0),
+		.CEALUMODE			(1'b0),
+		.CEINMODE			(1'b0),
+
+		.CECTRL				(1'b0),
+		.CECARRYIN			(1'b0),
+
+		.A						(a),
+		.B						(b),
+		.C						({48{1'b0}}),
+		.D						({25{1'b1}}),
+		.P						(p),
+
+		.CARRYIN				(1'b0),
+		.CARRYOUT			(),
+		.CARRYINSEL			(3'b000),
+
+		.CARRYCASCIN		(1'b0),
+		.CARRYCASCOUT		(),
+
+		.PATTERNDETECT		(),
+		.PATTERNBDETECT	(),
+
+		.OPMODE				(opmode),
+		.ALUMODE				(4'b0000),
+		.INMODE				(5'b00000),
+
+		.MULTSIGNIN			(1'b0),
+		.MULTSIGNOUT		(),
+
+		.UNDERFLOW			(),
+		.OVERFLOW			(),
+
+		.ACIN					(acin),
+		.BCIN					(18'd0),
+		.PCIN					(pcin),
+
+		.ACOUT				(acout),
+		.BCOUT				(),
+		.PCOUT				(pcout)
+  );
+

+endmodule

diff --git a/src/rtl/pe/artix7/multiplier32_artix7.v b/src/rtl/pe/artix7/multiplier32_artix7.v
index 5cc6340..1fc6d30 100644
--- a/src/rtl/pe/artix7/multiplier32_artix7.v
+++ b/src/rtl/pe/artix7/multiplier32_artix7.v
@@ -1,83 +1,171 @@
-`timescale 1ns / 1ps

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

+//

+// multiplier32_artix7.v

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

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

+//

+// 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 multiplier32_artix7

 	(

 		input					clk,

 		input		[31: 0]	a,

 		input		[31: 0]	b,

-		input		[31: 0]	t,

-		input		[31: 0]	c_in,

-		output	[31: 0]	p,

-		output	[31: 0]	c_out

+		output	[63: 0]	p

 	);

+

+		/* split a, b into smaller words */

+	wire	[16: 0]	a_lo = a[16: 0];

+	wire	[16: 0]	b_lo = b[16: 0];

+	wire	[14: 0]	a_hi = a[31:17];

+	wire	[14: 0]	b_hi = b[31:17];

+

+		/* smaller sub-products */

+	wire	[47: 0]	dsp1_p;

+	wire	[47: 0]	dsp2_p;

+	wire	[47: 0]	dsp4_p;

+

+		/* direct output mapping */

+	assign p[63:34] = dsp4_p[29: 0];

 	

-	reg	[31: 0]	t_dly;

-	reg	[31: 0]	c_in_dly;

-	

-	always @(posedge clk) t_dly <= t;

-	always @(posedge clk) c_in_dly <= c_in;

-	

-	wire	[31: 0]	t_c_in_s;

-	wire				t_c_in_c_out;

-	

-	reg				t_c_in_c_out_dly;

-	

-	always @(posedge clk) t_c_in_c_out_dly <= t_c_in_c_out;

+		/* delayed output mapping */

+	genvar fd;

+	generate for (fd=0; fd<17; fd=fd+1)

+		begin : gen_FD

+			FD # (.INIT( 1'b0)) FD_inst1 (.C(clk), .D(dsp1_p[fd]), .Q(p[fd +  0]));
+			FD # (.INIT( 1'b0)) FD_inst3 (.C(clk), .D(dsp2_p[fd]), .Q(p[fd + 17]));

+		end

+	endgenerate

+

+		/* product chains */

+	wire	[47: 0]	dsp1_p_chain;

+	wire	[47: 0]	dsp3_p_chain;

+	wire	[47: 0]	dsp2_p_chain;

 	

-	adder32_artix7 add_t_c_in

+		/* operand chains */

+	wire	[29: 0]	a_lo_chain;

+	wire	[29: 0]	a_hi_chain;  
+  

+		//

+		// a_lo * b_lo

+		//

+	dsp48e1_wrapper_ext #

+	(

+		.AREG			(1'b1),

+		.PREG			(1'b0),

+		.A_INPUT		("DIRECT")

+	)

+	dsp1

 	(

 		.clk		(clk),

-		.a			(t_dly),

-		.b			(c_in_dly),

-		.c_in		(1'b0),

-		.s			(t_c_in_s),

-		.c_out	(t_c_in_c_out)

+		.opmode	(7'b0110101),

+		.a			({13'd0, a_lo}),

+		.b			({1'b0, b_lo}),

+		.p			(dsp1_p),

+		.acin		(30'd0),

+		.pcin		(48'd0),

+		.acout	(a_lo_chain),

+		.pcout	(dsp1_p_chain)

 	);

-

-	wire	[63: 0]	a_b;

-	

-	wire	[31: 0]	a_b_lsb = a_b[31: 0];

-	wire	[31: 0]	a_b_msb = a_b[63:32];

-	

-	reg	[31: 0]	a_b_msb_dly;

-	

-	always @(posedge clk) a_b_msb_dly <= a_b_msb;

 	

-	ip_mul32 mul_a_b

+		//

+		// a_hi * b_lo

+		//

+	dsp48e1_wrapper_ext #

 	(

-		.clk	(clk),

-		.a		(a),

-		.b		(b),

-		.p		(a_b)

+		.AREG			(1'b1),

+		.PREG			(1'b0),

+		.A_INPUT		("DIRECT")

+	)

+	dsp2

+	(

+		.clk		(clk),

+		.opmode	(7'b0010101),

+		.a			({15'd0, a_hi}),

+		.b			({1'd0, b_lo}),

+		.p			(dsp2_p),

+		.acin		(30'd0),

+		.pcin		(dsp3_p_chain),

+		.acout	(a_hi_chain),

+		.pcout	(dsp2_p_chain)

 	);

 	

-	wire	[31: 0]	add_p_s;

-	wire				add_p_c_out;

-	

-	reg	[31: 0]	add_p_s_dly;

-	

-	always @(posedge clk) add_p_s_dly <= add_p_s;

-	

-	assign p = add_p_s_dly;

-	

-	adder32_artix7 add_p

+		//

+		// a_lo * b_hi

+		//

+	dsp48e1_wrapper_ext #

+	(

+		.AREG			(1'b0),

+		.PREG			(1'b0),

+		.A_INPUT		("CASCADE")

+	)

+	dsp3

 	(

 		.clk		(clk),

-		.a			(a_b_lsb),

-		.b			(t_c_in_s),

-		.c_in		(1'b0),

-		.s			(add_p_s),

-		.c_out	(add_p_c_out)

-	);

-

-	adder32_artix7 add_c_out

+		.opmode	(7'b1010101),

+		.a			(30'd0),

+		.b			({3'd0, b_hi}),

+		.p			(),

+		.acin		(a_lo_chain),

+		.pcin		(dsp1_p_chain),

+		.acout	(),

+		.pcout	(dsp3_p_chain)

+	);	

+	

+		//

+		// a_hi * b_hi

+		//

+	dsp48e1_wrapper_ext #

+	(

+		.AREG			(1'b0),

+		.PREG			(1'b1),

+		.A_INPUT		("CASCADE")

+	)

+	dsp4

 	(

 		.clk		(clk),

-		.a			(a_b_msb_dly),

-		.b			({{31{1'b0}}, t_c_in_c_out_dly}),

-		.c_in		(add_p_c_out),

-		.s			(c_out),

-		.c_out	()

+		.opmode	(7'b1010101),

+		.a			(30'd0),

+		.b			({3'd0, b_hi}),

+		.p			(dsp4_p),

+		.acin		(a_hi_chain),

+		.pcin		(dsp2_p_chain),

+		.acout	(),

+		.pcout	()

 	);

 

 endmodule

+

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

+// End-of-File

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

diff --git a/src/rtl/pe/artix7/systolic_pe_artix7.v b/src/rtl/pe/artix7/systolic_pe_artix7.v
new file mode 100644
index 0000000..b29f2c0
--- /dev/null
+++ b/src/rtl/pe/artix7/systolic_pe_artix7.v
@@ -0,0 +1,126 @@
+//------------------------------------------------------------------------------
+//
+// systolic_pe_artix7.v
+// -----------------------------------------------------------------------------
+// Hardware (Artix-7 DSP48E1) low-level systolic array processing element.

+//
+// 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 systolic_pe_artix7

+	(

+		input					clk,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		input		[31: 0]	t,

+		input		[31: 0]	c_in,

+		output	[31: 0]	p,

+		output	[31: 0]	c_out

+	);

+	

+	reg	[31: 0]	t_dly;

+	reg	[31: 0]	c_in_dly;

+	

+	always @(posedge clk) t_dly <= t;

+	always @(posedge clk) c_in_dly <= c_in;

+	

+	wire	[31: 0]	t_c_in_s;

+	wire				t_c_in_c_out;

+	

+	reg				t_c_in_c_out_dly;

+	

+	always @(posedge clk) t_c_in_c_out_dly <= t_c_in_c_out;

+	

+	adder32_artix7 add_t_c_in

+	(

+		.clk		(clk),

+		.ce		(1'b1),

+		.a			(t_dly),

+		.b			(c_in_dly),

+		.c_in		(1'b0),

+		.s			(t_c_in_s),

+		.c_out	(t_c_in_c_out)

+	);

+

+	wire	[63: 0]	a_b;

+	

+	wire	[31: 0]	a_b_lsb = a_b[31: 0];

+	wire	[31: 0]	a_b_msb = a_b[63:32];

+	

+	reg	[31: 0]	a_b_msb_dly;

+	

+	always @(posedge clk) a_b_msb_dly <= a_b_msb;

+	

+	multiplier32_artix7 mul_a_b

+	(

+		.clk	(clk),

+		.a		(a),

+		.b		(b),

+		.p		(a_b)

+	);

+	

+	wire	[31: 0]	add_p_s;

+	wire				add_p_c_out;

+	

+	reg	[31: 0]	add_p_s_dly;

+	

+	always @(posedge clk) add_p_s_dly <= add_p_s;

+	

+	assign p = add_p_s_dly;

+	

+	adder32_artix7 add_p

+	(

+		.clk		(clk),

+		.ce		(1'b1),

+		.a			(a_b_lsb),

+		.b			(t_c_in_s),

+		.c_in		(1'b0),

+		.s			(add_p_s),

+		.c_out	(add_p_c_out)

+	);

+

+	adder32_artix7 add_c_out

+	(

+		.clk		(clk),

+		.ce		(1'b1),

+		.a			(a_b_msb_dly),

+		.b			({{31{1'b0}}, t_c_in_c_out_dly}),

+		.c_in		(add_p_c_out),

+		.s			(c_out),

+		.c_out	()

+	);

+

+endmodule

+

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

diff --git a/src/rtl/pe/generic/systolic_pe_generic.v b/src/rtl/pe/generic/systolic_pe_generic.v
new file mode 100644
index 0000000..6c98f44
--- /dev/null
+++ b/src/rtl/pe/generic/systolic_pe_generic.v
@@ -0,0 +1,85 @@
+//======================================================================

+//

+// systolic_pe_generic.v

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

+// Generic low-level systolic array processing element.

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2017, NORDUnet A/S All rights reserved.

+//

+// 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 systolic_pe_generic

+	(

+		input					clk,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		input		[31: 0]	t,

+		input		[31: 0]	c_in,

+		output	[31: 0]	p,

+		output	[31: 0]	c_out

+	);

+

+		//

+		// Customizable Latency

+		//

+	parameter LATENCY = 4;

+		

+		//

+		// Delay Line

+		//

+	reg	[63: 0]	abct[1:LATENCY];

+	

+		//

+		// Outputs

+		//

+	assign p			= abct[LATENCY][31: 0];

+	assign c_out	= abct[LATENCY][63:32];

+

+		//

+		// Sub-products

+		//

+	wire	[63: 0]	ab = {{32{1'b0}}, a}    * {{32{1'b0}}, b};

+	wire	[63: 0]	ct = {{32{1'b0}}, c_in} + {{32{1'b0}}, t};

+

+		//

+		// Delay

+		//

+	integer i;

+	always @(posedge clk)

+		//

+		for (i=1; i<=LATENCY; i=i+1)

+			abct[i] <= (i == 1) ? ab + ct : abct[i-1];

+

+endmodule

+

+//======================================================================

+// End of file

+//======================================================================

diff --git a/src/rtl/pe/modexpa7_adder32.v b/src/rtl/pe/modexpa7_adder32.v
new file mode 100644
index 0000000..ad296b1
--- /dev/null
+++ b/src/rtl/pe/modexpa7_adder32.v
@@ -0,0 +1,76 @@
+//======================================================================

+//

+// modexpa7_adder32.v

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

+// Low-level processing element wrapper (adder).

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2017, NORDUnet A/S All rights reserved.

+//

+// 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 modexpa7_adder32

+	(

+		input					clk,

+		input					ce,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		input					c_in,

+		output	[31: 0]	s,

+		output				c_out

+	);

+	

+	

+		//
+		// Include Primitive Selector
+		//
+	`include "modexpa7_lowlevel_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

+

+//======================================================================

+// End of file

+//======================================================================

diff --git a/src/rtl/pe/modexpa7_lowlevel_settings.v b/src/rtl/pe/modexpa7_lowlevel_settings.v
new file mode 100644
index 0000000..93f5f34
--- /dev/null
+++ b/src/rtl/pe/modexpa7_lowlevel_settings.v
@@ -0,0 +1,15 @@
+//`define USE_VENDOR_PRIMITIVES

+

+`ifdef USE_VENDOR_PRIMITIVES

+

+`define ADDER32_PRIMITIVE			adder32_artix7

+`define SUBTRACTOR32_PRIMITIVE	subtractor32_artix7

+`define SYSTOLIC_PE_PRIMITIVE	systolic_pe_artix7

+

+`else

+

+`define ADDER32_PRIMITIVE			adder32_generic

+`define SUBTRACTOR32_PRIMITIVE	subtractor32_generic

+`define SYSTOLIC_PE_PRIMITIVE	systolic_pe_generic

+

+`endif

diff --git a/src/rtl/pe/modexpa7_subtractor32.v b/src/rtl/pe/modexpa7_subtractor32.v
new file mode 100644
index 0000000..75b9c13
--- /dev/null
+++ b/src/rtl/pe/modexpa7_subtractor32.v
@@ -0,0 +1,76 @@
+//======================================================================

+//

+// modexpa7_subtractor32.v

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

+// Low-level processing element wrapper (subtractor).

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2017, NORDUnet A/S All rights reserved.

+//

+// 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 modexpa7_subtractor32

+	(

+		input					clk,

+		input					ce,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		input					b_in,

+		output	[31: 0]	d,

+		output				b_out

+	);

+	

+	

+		//
+		// Include Primitive Selector
+		//
+	`include "modexpa7_lowlevel_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

+

+//======================================================================

+// End of file

+//======================================================================

diff --git a/src/rtl/pe/modexpa7_systolic_pe.v b/src/rtl/pe/modexpa7_systolic_pe.v
new file mode 100644
index 0000000..22e6874
--- /dev/null
+++ b/src/rtl/pe/modexpa7_systolic_pe.v
@@ -0,0 +1,75 @@
+//======================================================================

+//

+// modexpa7_systolic_pe.v

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

+// Low-level processing element wrapper (systolic array processing element).

+//

+// Authors: Pavel Shatov

+//

+// Copyright (c) 2017, NORDUnet A/S All rights reserved.

+//

+// 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 modexpa7_systolic_pe

+	(

+		input					clk,

+		input		[31: 0]	a,

+		input		[31: 0]	b,

+		input		[31: 0]	t,

+		input		[31: 0]	c_in,

+		output	[31: 0]	p,

+		output	[31: 0]	c_out

+	);

+

+

+		//
+		// Include Primitive Selector
+		//
+	`include "modexpa7_lowlevel_settings.v"
+
+
+		//
+		// Instantiate Vendor/Generic Primitive
+		//
+	`SYSTOLIC_PE_PRIMITIVE systolic_pe_inst
+	(
+		.clk(clk),
+		.a(a),
+		.b(b),

+		.t(t),
+		.c_in(c_in),
+		.p(p),
+		.c_out(c_out)
+	);
+

+endmodule

+

+//======================================================================

+// End of file

+//======================================================================