Subversion Repositories theia_gpu

`timescale 1ns / 1ps

`include "aDefinitions.v"

//////////////////////////////////////////////////////////////////////////////////

// Company: 

// Engineer: 

// 

// Create Date:    19:49:14 01/13/2009 

// Design Name: 

// Module Name:    RadixRMul 

// Project Name: 

// Target Devices: 

// Tool versions: 

// Description: 

//

// Dependencies: 

//

// Revision: 

// Revision 0.01 - File Created

// Additional Comments: 

//

//////////////////////////////////////////////////////////////////////////////////

`default_nettype none

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

module MUX_4_TO_1_32Bits_FullParallel

(

        input wire [31:0] i1,i2,i3,i4,

        output reg [31:0] O,

        input wire [1:0] Sel

);

always @ ( Sel or i1 or i2 or i3 or i4 )

begin

        case (Sel)

                2'b00: O = i1;

                2'b01: O = i2;

                2'b10: O = i3;

                2'b11: O = i4;

        endcase

end

endmodule

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

/*

module SHIFTER2_16_BITS

(

input wire C,

input wire[15:0] In,

output reg[15:0] Out

);

reg [15:0] Temp;

always @ (posedge C )

begin

        Out =  In << 2;

end

endmodule

*/

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

module RADIX_R_MUL_32_FULL_PARALLEL

(

        input wire Clock,

        input wire Reset,

        input wire[31:0] A,

        input wire[31:0] B,

        output wire[63:0] R,

        input wire iUnscaled,

        input wire iInputReady,

        output wire OutputReady

);

wire wInputDelay1;

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

wire [31:0] wALatched,wBLatched;

FFD_POSEDGE_SYNCRONOUS_RESET # ( `WIDTH ) FFD1

(

        .Clock( Clock ),

        .Reset( Reset),

        .Enable( iInputReady ),

        .D( A ),

        .Q( wALatched)

);

FFD_POSEDGE_SYNCRONOUS_RESET # ( `WIDTH ) FFD2

(

        .Clock( Clock ),

        .Reset( Reset),

        .Enable( iInputReady ),

        .D( B ),

        .Q( wBLatched )

);

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

FFD_POSEDGE_SYNCRONOUS_RESET #(1) FFOutputReadyDelay1

(

        .Clock( Clock ),

        .Reset( Reset ),

        .Enable( 1'b1 ),

        .D( iInputReady ),

        .Q( wInputDelay1 )

);

FFD_POSEDGE_SYNCRONOUS_RESET #(1) FFOutputReadyDelay2

(

        .Clock( Clock ),

        .Reset( Reset ),

        .Enable( 1'b1 ),

        .D(  wInputDelay1 ),

        .Q( OutputReady  )

);

wire [31:0] wA, w2A, w3A, wB;

wire SignA,SignB;

assign SignA = wALatched[31];

assign SignB = wBLatched[31];

assign wB = (SignB == 1) ? ~wBLatched + 1'b1 : wBLatched;

assign wA = (SignA == 1) ? ~wALatched + 1'b1 : wALatched;

assign w2A = wA << 1;

assign w3A = w2A + wA;

wire [31:0] wPartialResult0,wPartialResult1,wPartialResult2,wPartialResult3,wPartialResult4,wPartialResult5;

wire [31:0] wPartialResult6,wPartialResult7,wPartialResult8,wPartialResult9,wPartialResult10,wPartialResult11;

wire [31:0] wPartialResult12,wPartialResult13,wPartialResult14,wPartialResult15;

MUX_4_TO_1_32Bits_FullParallel MUX0

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[1],wB[0]} ),

                .O( wPartialResult0 )

);

MUX_4_TO_1_32Bits_FullParallel MUX1

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[3],wB[2]} ),

                .O( wPartialResult1 )

);

MUX_4_TO_1_32Bits_FullParallel MUX2

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[5],wB[4]} ),

                .O( wPartialResult2 )

);

MUX_4_TO_1_32Bits_FullParallel MUX3

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[7],wB[6]} ),

                .O( wPartialResult3 )

);

MUX_4_TO_1_32Bits_FullParallel MUX4

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[9],wB[8]} ),

                .O( wPartialResult4 )

);

MUX_4_TO_1_32Bits_FullParallel MUX5

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[11],wB[10]} ),

                .O( wPartialResult5 )

);

MUX_4_TO_1_32Bits_FullParallel MUX6

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[13],wB[12]} ),

                .O( wPartialResult6 )

);

MUX_4_TO_1_32Bits_FullParallel MUX7

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[15],wB[14]} ),

                .O( wPartialResult7 )

);

MUX_4_TO_1_32Bits_FullParallel MUX8

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[17],wB[16]} ),

                .O( wPartialResult8 )

);

MUX_4_TO_1_32Bits_FullParallel MUX9

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[19],wB[18]} ),

                .O( wPartialResult9 )

);

MUX_4_TO_1_32Bits_FullParallel MUX10

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[21],wB[20]} ),

                .O( wPartialResult10 )

);

MUX_4_TO_1_32Bits_FullParallel MUX11

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[23],wB[22]} ),

                .O( wPartialResult11 )

);

MUX_4_TO_1_32Bits_FullParallel MUX12

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[25],wB[24]} ),

                .O( wPartialResult12 )

);

MUX_4_TO_1_32Bits_FullParallel MUX13

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[27],wB[26]} ),

                .O( wPartialResult13 )

);

MUX_4_TO_1_32Bits_FullParallel MUX14

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[29],wB[28]} ),

                .O( wPartialResult14 )

);

MUX_4_TO_1_32Bits_FullParallel MUX15

(

                .i1( 32'b 0 ),

                .i2( wA ),

                .i3( w2A ),

                .i4( w3A ),

                .Sel( {wB[31],wB[30]} ),

                .O( wPartialResult15 )

);

wire[63:0] wPartialResult1_0,wPartialResult1_1,wPartialResult1_2,wPartialResult1_3,

wPartialResult1_4,wPartialResult1_5,wPartialResult1_6,wPartialResult1_7;

assign wPartialResult1_0 = ({32'b0,wPartialResult0}) + ({32'b0,wPartialResult1}<<2);

assign wPartialResult1_1 = ({32'b0,wPartialResult2} << 4) + ({32'b0,wPartialResult3}<<6);

assign wPartialResult1_2 = ({32'b0,wPartialResult4} << 8) + ({32'b0,wPartialResult5}<<10);

assign wPartialResult1_3 = ({32'b0,wPartialResult6} << 12)+ ({32'b0,wPartialResult7}<<14);

assign wPartialResult1_4 = ({32'b0,wPartialResult8} << 16)+ ({32'b0,wPartialResult9}<<18);

assign wPartialResult1_5 = ({32'b0,wPartialResult10} << 20) + ({32'b0,wPartialResult11}<< 22);

assign wPartialResult1_6 = ({32'b0,wPartialResult12} << 24) + ({32'b0,wPartialResult13} << 26);

assign wPartialResult1_7 = ({32'b0,wPartialResult14} << 28) + ({32'b0,wPartialResult15} << 30);

wire [63:0] wPartialResult2_0,wPartialResult2_1,wPartialResult2_2,wPartialResult2_3;

assign wPartialResult2_0 = wPartialResult1_0 + wPartialResult1_1;

assign wPartialResult2_1 = wPartialResult1_2 + wPartialResult1_3;

assign wPartialResult2_2 = wPartialResult1_4 + wPartialResult1_5;

assign wPartialResult2_3 = wPartialResult1_6 + wPartialResult1_7;

wire [63:0] wPartialResult3_0,wPartialResult3_1;

assign wPartialResult3_0 = wPartialResult2_0 + wPartialResult2_1;

assign wPartialResult3_1 = wPartialResult2_2 + wPartialResult2_3;

wire [63:0] R_pre1,R_pre2;

//assign R_pre1 = (wPartialResult3_0 + wPartialResult3_1);

assign R_pre1 = (iUnscaled == 1) ? (wPartialResult3_0 + wPartialResult3_1) : ((wPartialResult3_0 + wPartialResult3_1) >> `SCALE);

assign R_pre2 = ( (SignA ^ SignB) == 1) ? ~R_pre1 + 1'b1 : R_pre1;

//assign R = R_pre2 >> `SCALE;

assign R = R_pre2;

endmodule