Subversion Repositories nova

//--------------------------------------------------------------------------------------------------

// Design    : nova

// Author(s) : Ke Xu

// Email           : eexuke@yahoo.com

// File      : Inter_pred_CPE.v

// Generated : Oct 14, 2005

// Copyright (C) 2008 Ke Xu                

//-------------------------------------------------------------------------------------------------

// Description 

// Processing Element for Inter prediction of Chroma pixels

//-------------------------------------------------------------------------------------------------

// synopsys translate_off

`include "timescale.v"

// synopsys translate_on

`include "nova_defines.v"

module Inter_pred_CPE (xFracC,yFracC,

        Inter_C_window_0_0,Inter_C_window_1_0,Inter_C_window_2_0,

        Inter_C_window_0_1,Inter_C_window_1_1,Inter_C_window_2_1,

        Inter_C_window_0_2,Inter_C_window_1_2,Inter_C_window_2_2,

        CPE0_out,CPE1_out,CPE2_out,CPE3_out);

        input [2:0] xFracC,yFracC;

        input [7:0] Inter_C_window_0_0,Inter_C_window_1_0,Inter_C_window_2_0;

        input [7:0] Inter_C_window_0_1,Inter_C_window_1_1,Inter_C_window_2_1;

        input [7:0] Inter_C_window_0_2,Inter_C_window_1_2,Inter_C_window_2_2;

        output [7:0] CPE0_out,CPE1_out,CPE2_out,CPE3_out;

        wire [3:0] xFracC_n,yFracC_n;

        assign xFracC_n = 4'b1000 - xFracC;

        assign yFracC_n = 4'b1000 - yFracC;

        CPE CPE0 (

                .xFracC(xFracC),

                .yFracC(yFracC),

                .xFracC_n(xFracC_n),

                .yFracC_n(yFracC_n),

                .a(Inter_C_window_0_0),

                .b(Inter_C_window_1_0),

                .c(Inter_C_window_0_1),

                .d(Inter_C_window_1_1),

                .out(CPE0_out)

                );

        CPE CPE1 (

                .xFracC(xFracC),

                .yFracC(yFracC),

                .xFracC_n(xFracC_n),

                .yFracC_n(yFracC_n),

                .a(Inter_C_window_1_0),

                .b(Inter_C_window_2_0),

                .c(Inter_C_window_1_1),

                .d(Inter_C_window_2_1),

                .out(CPE1_out)

                );

        CPE CPE2 (

                .xFracC(xFracC),

                .yFracC(yFracC),

                .xFracC_n(xFracC_n),

                .yFracC_n(yFracC_n),

                .a(Inter_C_window_0_1),

                .b(Inter_C_window_1_1),

                .c(Inter_C_window_0_2),

                .d(Inter_C_window_1_2),

                .out(CPE2_out)

                );

        CPE CPE3 (

                .xFracC(xFracC),

                .yFracC(yFracC),

                .xFracC_n(xFracC_n),

                .yFracC_n(yFracC_n),

                .a(Inter_C_window_1_1),

                .b(Inter_C_window_2_1),

                .c(Inter_C_window_1_2),

                .d(Inter_C_window_2_2),

                .out(CPE3_out)

                );

endmodule

module CPE (xFracC,yFracC,xFracC_n,yFracC_n,a,b,c,d,out);

        input [2:0] xFracC,yFracC;

        input [3:0] xFracC_n,yFracC_n;

        input [7:0] a,b,c,d;

        output [7:0] out;

        wire [13:0] CPE_base0_out,CPE_base1_out,CPE_base2_out,CPE_base3_out;

        wire [13:0] out_tmp;

        CPE_base CPE_base0 (

                .x(xFracC_n),

                .y(yFracC_n),

                .Int_pel(a),

                .out(CPE_base0_out)

                );

        CPE_base CPE_base1 (

                .x({1'b0,xFracC}),

                .y(yFracC_n),

                .Int_pel(b),

                .out(CPE_base1_out)

                );

        CPE_base CPE_base2 (

                .x(xFracC_n),

                .y({1'b0,yFracC}),

                .Int_pel(c),

                .out(CPE_base2_out)

                );

        CPE_base CPE_base3 (

                .x({1'b0,xFracC}),

                .y({1'b0,yFracC}),

                .Int_pel(d),

                .out(CPE_base3_out)

                );

        assign out_tmp = (CPE_base0_out + CPE_base1_out) + (CPE_base2_out + CPE_base3_out) + 32;

        assign out = out_tmp[13:6];

endmodule

module CPE_base (x,y,Int_pel,out);

        input [3:0] x;

        input [3:0] y;

        input [7:0] Int_pel;

        output [13:0] out;

        wire [10:0] sum_x3;

        wire [9:0] sum_x2;

        wire [8:0] sum_x1;

        wire [7:0] sum_x0;

        wire [10:0] sum_x;

        wire [13:0] sum_y3;

        wire [12:0] sum_y2;

        wire [11:0] sum_y1;

        wire [10:0] sum_y0;

        assign sum_x3 = (x[3] == 1'b1)? {Int_pel,3'b0}:0;

        assign sum_x2 = (x[2] == 1'b1)? {Int_pel,2'b0}:0;

        assign sum_x1 = (x[1] == 1'b1)? {Int_pel,1'b0}:0;

        assign sum_x0 = (x[0] == 1'b1)? Int_pel:0;

        assign sum_x = (sum_x3 + sum_x2) + (sum_x1 + sum_x0);

        assign sum_y3 = (y[3] == 1'b1)? {sum_x,3'b0}:0;

        assign sum_y2 = (y[2] == 1'b1)? {sum_x,2'b0}:0;

        assign sum_y1 = (y[1] == 1'b1)? {sum_x,1'b0}:0;

        assign sum_y0 = (y[0] == 1'b1)? sum_x:0;

        assign out = (sum_y3 + sum_y2) + (sum_y1 + sum_y0);

endmodule