Trying to fix the bug during calculation of SN in systolic multiplier.

1 files changed, 12 insertions, 39 deletions

diff --git a/src/rtl/modexpa7_systolic_multiplier.v b/src/rtl/modexpa7_systolic_multiplier.v
index 378dc63..f53354e 100644
--- a/src/rtl/modexpa7_systolic_multiplier.v
+++ b/src/rtl/modexpa7_systolic_multiplier.v
@@ -49,7 +49,7 @@ module modexpa7_systolic_multiplier #
 			//

 			// Explain.

 			//

-		parameter	SYSTOLIC_ARRAY_POWER		= 2

+		parameter	SYSTOLIC_ARRAY_POWER		= 1

 	)

 	(

 		input											clk,

@@ -597,12 +597,13 @@ module modexpa7_systolic_multiplier #
 		//

 		// Systolic Array of Processing Elements

 		//

-	reg	[31: 0]	pe_a    [0:SYSTOLIC_ARRAY_LENGTH-1];

-	reg	[31: 0]	pe_b    [0:SYSTOLIC_ARRAY_LENGTH-1];

-	wire	[31: 0]	pe_t    [0:SYSTOLIC_ARRAY_LENGTH-1];

-	wire	[31: 0]	pe_c_in [0:SYSTOLIC_ARRAY_LENGTH-1];

-	wire	[31: 0]	pe_p    [0:SYSTOLIC_ARRAY_LENGTH-1];

-	wire	[31: 0]	pe_c_out[0:SYSTOLIC_ARRAY_LENGTH-1];

+	reg	[31: 0]	pe_a        [0:SYSTOLIC_ARRAY_LENGTH-1];

+	reg	[31: 0]	pe_b        [0:SYSTOLIC_ARRAY_LENGTH-1];

+	wire	[31: 0]	pe_t        [0:SYSTOLIC_ARRAY_LENGTH-1];

+	wire	[31: 0]	pe_c_in     [0:SYSTOLIC_ARRAY_LENGTH-1];

+	wire	[31: 0]	pe_p        [0:SYSTOLIC_ARRAY_LENGTH-1];

+	wire	[31: 0]	pe_c_out    [0:SYSTOLIC_ARRAY_LENGTH-1];

+	reg	[31: 0]	pe_c_out_dly[0:SYSTOLIC_ARRAY_LENGTH-1];

 	

 

 		//

@@ -657,34 +658,6 @@ module modexpa7_systolic_multiplier #
 		.d_out		(fifo_t_dout)

 	);

 	

-	/*

-	ip_fifo_t fifo_t

-	(

-		.clk		(clk),

-		.srst		(fifo_t_rst),

-		.wr_en	(fifo_t_wren),

-		.din		(fifo_t_din),

-		.rd_en	(fifo_t_rden),

-		.dout		(fifo_t_dout),

-		.full		(),

-		.empty	()

-	);

-	*/

-	

-	/**/

-	/*

-	ip_fifo_c fifo_c

-	(

-		.clk		(clk),

-		.srst		(fifo_c_rst),

-		.wr_en	(fifo_c_wren),

-		.din		(fifo_c_din),

-		.rd_en	(fifo_c_rden),

-		.dout		(fifo_c_dout),

-		.full		(debug_fifo_full),

-		.empty	(debug_fifo_empty)

-	);*/

-

 	generate for (i=0; i<SYSTOLIC_ARRAY_LENGTH; i=i+1)

 		begin : modexpa7_systolic_pe_multiplier		

 			modexpa7_systolic_pe systolic_pe_inst

@@ -699,7 +672,8 @@ module modexpa7_systolic_multiplier #
 			);

 			assign pe_c_in[i] = fifo_c_dout[32 * (i + 1) - 1 -: 32];

 			assign pe_t[i] = fifo_t_dout[32 * (i + 1) - 1 -: 32];

-			assign fifo_c_din[32 * (i + 1) - 1 -: 32] = pe_c_out[i];

+			assign fifo_c_din[32 * (i + 1) - 1 -: 32] = pe_c_out_dly[i];

+			always @(posedge clk) pe_c_out_dly[i] <= pe_c_out[i];

 		end

 	endgenerate

 

@@ -814,11 +788,10 @@ module modexpa7_systolic_multiplier #
 	always @(posedge clk)

 		shreg_now_unloading_dly <= shreg_now_unloading;

 	

-	assign fifo_c_wren = shreg_now_unloading;

+	assign fifo_c_wren = shreg_now_unloading_dly;

 	assign fifo_c_rden = shreg_now_loading;

 	

-	assign fifo_t_wren = shreg_now_unloading_dly;

-	

+	assign fifo_t_wren = shreg_now_unloading_dly;	

 	assign fifo_t_rden = shreg_now_loading;