cvg.v
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
*************************************************************************/
// $Id: cvg.v,v 1.2 2002/11/22 00:34:20 rws Exp $
/* Project Reality
MDP
Created by Mike M. Cai 6/1/94
*/
module cvg( cv_value, mask15, x_offset, y_offset,
x_cur, xmin0_, xmin1_, xmin2_, xmin3_,
xmax0_, xmax1_, xmax2_, xmax3_,
x_val,
clk, start_gclk);
output [3:0] cv_value;
output mask15;
output [1:0] x_offset, y_offset;
input [11:0] x_cur;
input [12:0] xmin0_, xmin1_, xmin2_, xmin3_,
xmax0_, xmax1_, xmax2_, xmax3_;
input [3:0] x_val;
input clk, start_gclk;
// comparisons
wire [3:0] xmin_eq, xmin_less,
eq_xmax, less_xmax;
// cvmask
wire [15:0] mask;
reg mask15;
// cvvalue
wire [3:0] cv_value_m;
reg [3:0] cv_value;
// cvoffset
wire [1:0] x_offset_m, y_offset_m;
reg [1:0] x_offset, y_offset;
cvcompl comp0_l (.xmin_eq(xmin_eq[0]), .xmin_less(xmin_less[0]),
.xmin(xmin0_[12:3]), .x_cur(x_cur));
cvcompl comp1_l (.xmin_eq(xmin_eq[1]), .xmin_less(xmin_less[1]),
.xmin(xmin1_[12:3]), .x_cur(x_cur));
cvcompl comp2_l (.xmin_eq(xmin_eq[2]), .xmin_less(xmin_less[2]),
.xmin(xmin2_[12:3]), .x_cur(x_cur));
cvcompl comp3_l (.xmin_eq(xmin_eq[3]), .xmin_less(xmin_less[3]),
.xmin(xmin3_[12:3]), .x_cur(x_cur));
cvcompr comp0_r (.eq_xmax(eq_xmax[0]), .less_xmax(less_xmax[0]),
.x_cur(x_cur), .xmax(xmax0_[12:3]));
cvcompr comp1_r (.eq_xmax(eq_xmax[1]), .less_xmax(less_xmax[1]),
.x_cur(x_cur), .xmax(xmax1_[12:3]));
cvcompr comp2_r (.eq_xmax(eq_xmax[2]), .less_xmax(less_xmax[2]),
.x_cur(x_cur), .xmax(xmax2_[12:3]));
cvcompr comp3_r (.eq_xmax(eq_xmax[3]), .less_xmax(less_xmax[3]),
.x_cur(x_cur), .xmax(xmax3_[12:3]));
cvmask maskone ( .mask_out(mask),
.eq_xmax(eq_xmax), .less_xmax(less_xmax),
.xmin_eq(xmin_eq), .xmin_less(xmin_less), .x_val(x_val),
.xmax0_fr(xmax0_[2:0]), .xmax1_fr(xmax1_[2:0]),
.xmax2_fr(xmax2_[2:0]), .xmax3_fr(xmax3_[2:0]),
.xmin0_fr(xmin0_[2:0]), .xmin1_fr(xmin1_[2:0]),
.xmin2_fr(xmin2_[2:0]), .xmin3_fr(xmin3_[2:0]) );
cvvalue cvv ( .cv_value(cv_value_m), .mask_in(mask));
cvoffset cvo ( .x_offset(x_offset_m), .y_offset(y_offset_m), .mask_in(mask));
always @(posedge clk)
if (start_gclk) begin
cv_value <= cv_value_m;
mask15 <= mask[15];
x_offset <= x_offset_m;
y_offset <= y_offset_m;
end
endmodule // cvg