path: root/src/rtl/modexps6_adder64_carry32.v

`timescale 1ns / 1ps

module modexps6_adder64_carry32
	(
		clk, t, x, y, s, c_in, c_out
	);
	
	
		//
		// Ports
		//
	input		wire				clk;
	input		wire	[31: 0]	t;
	input		wire	[31: 0]	x;
	input		wire	[31: 0]	y;
	output	wire	[31: 0]	s;
	input		wire	[31: 0]	c_in;
	output	wire	[31: 0]	c_out;
	
	
		//
		// Multiplier
		//
	wire	[63: 0]	multiplier_out;
	
	multiplier_s6 dsp_multiplier
	(
		.clk	(clk),
		.a		(x),
		.b		(y),
		.p		(multiplier_out)
	);
	
	
		//
		// Carry and T
		//
	wire	[63: 0]	t_ext = {{32{1'b0}}, t};
	wire	[63: 0]	c_ext = {{32{1'b0}}, c_in};
	
	
		//
		// Sum
		//
	wire	[63: 0]	sum = multiplier_out + c_in + t;
		
		
		//
		// Output
		//
	assign s = sum[31: 0];
	assign c_out = sum[63:32];
		
	/*
	reg	[31: 0]	s_reg;
	reg	[31: 0]	c_out_reg;
	
	assign s = s_reg;
	assign c_out = c_out_reg;
	
	always @(posedge clk) begin
		//
		s_reg			<= sum[31: 0];
		c_out_reg	<= sum[63:32];
		//
	end
	*/
	
	
endmodule