vi_lerp_booth7.v
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////////////////////////////////////////////////////////////////////////
//
// Project Reality
//
// module: vi_lerp_booth7
// description: Pseudo-Booth encoder for lerp for video interface.
//
// designer: Phil Gossett
// date: 10/23/94
//
////////////////////////////////////////////////////////////////////////
// $Id: vi_lerp_booth7.v,v 1.1.1.1 2002/05/17 06:07:49 blythe Exp $
module vi_lerp_booth7 (x, y, a, p);
input x;
input y;
input [4:0] a;
wire [5:0] pp;
output [5:0] p; // pseudo-booth encoded partial product
fn05d2 mux7s0 (.zn(msel), .a1(y), .b1(x)); // msel = !x && y
fn01d2 mux7e0 (.zn(menb), .a1(y), .b1(x)); // menb = !x || y
mx21d1 mux7b0 (.s(msel), .i0(a[0]), .i1(1'b0), .z(pp[0]));
mx21d1 mux7b1 (.s(msel), .i0(a[1]), .i1(a[0]), .z(pp[1]));
mx21d1 mux7b2 (.s(msel), .i0(a[2]), .i1(a[1]), .z(pp[2]));
mx21d1 mux7b3 (.s(msel), .i0(a[3]), .i1(a[2]), .z(pp[3]));
mx21d1 mux7b4 (.s(msel), .i0(a[4]), .i1(a[3]), .z(pp[4]));
mx21d1 mux7b5 (.s(msel), .i0(1'b0), .i1(a[4]), .z(pp[5]));
nd02d1 and7b0 (.a1(menb), .a2(pp[0]), .zn(p[0]));
nd02d1 and7b1 (.a1(menb), .a2(pp[1]), .zn(p[1]));
nd02d1 and7b2 (.a1(menb), .a2(pp[2]), .zn(p[2]));
nd02d1 and7b3 (.a1(menb), .a2(pp[3]), .zn(p[3]));
nd02d1 and7b4 (.a1(menb), .a2(pp[4]), .zn(p[4]));
nd02d1 and7b5 (.a1(menb), .a2(pp[5]), .zn(p[5]));
endmodule // vi_lerp_booth7