ex_111.v

unsigned and signed multiply circuit implement.

`timescale 1 ns/1 ns

module EX_111_bit_manipulation(a, b, c, k_usgn, k_sgn);
input	[7:0]	a, b, c;
output	[15:0]	k_usgn, k_sgn;
wire	[15:0]	k_usgn, k_sgn;

wire	[7:0]	d_usgn, e_usgn, d_sgn, e_sgn;
wire	[15:0]	tmp_usgn, tmp_sgn;

// for unsigned operation
assign	tmp_usgn = a * b;

assign	{d_usgn, e_usgn} = tmp_usgn + {8'h00,c};

assign	k_usgn = {d_usgn, e_usgn};


// for signed operation
assign	tmp_sgn = {{8{a[7]}},a} * {{8{b[7]}},b};

assign	{d_sgn , e_sgn } = tmp_sgn  + {{8{c[7]}},c};

assign	k_sgn = {d_sgn, e_sgn};

endmodule