des_key_sel.v

有效的改进3-DES算法的执行速度

// *******************************************************//
//
//  DES_KEY_SEL 
//  Generate 16 pipelined sub-keys 
//  Author:
//  Date  ：2005/11/04
//
// *******************************************************//

module  DES_KEY_SEL(des_clk,rst_n, K, mode, K1, K2, K3, K4, K5, K6, K7, K8, K9,
		K10, K11, K12, K13, K14, K15, K16);
input		des_clk;
input           rst_n  ;
input	[55:0]	K;
input mode;
output	[1:48]	K1, K2, K3, K4, K5, K6, K7, K8, K9;
output	[1:48]	K10, K11, K12, K13, K14, K15, K16;

wire	[1:48]	K1, K2, K3, K4, K5, K6, K7, K8, K9;
wire	[1:48]	K10, K11, K12, K13, K14, K15, K16;
reg	[55:0]	K_r0, K_r1, K_r2, K_r3, K_r4, K_r5, K_r6, K_r7;
reg	[55:0]	K_r8, K_r9, K_r10, K_r11, K_r12, K_r13, K_r14;

always @(posedge des_clk or negedge rst_n)
begin
    if(rst_n==1'b0)
        begin
            K_r0  <= 56'b0; 
            K_r1  <= 56'b0;
            K_r2  <= 56'b0;
            K_r3  <= 56'b0;
            K_r4  <= 56'b0;
            K_r5  <= 56'b0;
            K_r6  <= 56'b0;
            K_r7  <= 56'b0;
            K_r8  <= 56'b0;
            K_r9  <= 56'b0;
            K_r10 <= 56'b0;
            K_r11 <= 56'b0;
            K_r12 <= 56'b0;
            K_r13 <= 56'b0;
            K_r14 <= 56'b0;
        end
    else
        begin    
	    K_r0  <= #1 K;
	    K_r1  <= #1 K_r0;
	    K_r2  <= #1 K_r1;
	    K_r3  <= #1 K_r2;
	    K_r4  <= #1 K_r3;
	    K_r5  <= #1 K_r4;
	    K_r6  <= #1 K_r5;
	    K_r7  <= #1 K_r6;
	    K_r8  <= #1 K_r7;
	    K_r9  <= #1 K_r8;
	    K_r10 <= #1 K_r9;
	    K_r11 <= #1 K_r10;
	    K_r12 <= #1 K_r11;
	    K_r13 <= #1 K_r12;
	    K_r14 <= #1 K_r13;
	end
end

assign K16[1]  = mode ? K_r14[47] : K_r14[40];
assign K16[2]  = mode ? K_r14[11] : K_r14[4];
assign K16[3]  = mode ? K_r14[26] : K_r14[19];
assign K16[4]  = mode ? K_r14[3] : K_r14[53];
assign K16[5]  = mode ? K_r14[13] : K_r14[6];
assign K16[6]  = mode ? K_r14[41] : K_r14[34];
assign K16[7]  = mode ? K_r14[27] : K_r14[20];
assign K16[8]  = mode ? K_r14[6] : K_r14[24];
assign K16[9]  = mode ? K_r14[54] : K_r14[47];
assign K16[10] = mode ? K_r14[48] : K_r14[41];
assign K16[11] = mode ? K_r14[39] : K_r14[32];
assign K16[12] = mode ? K_r14[19] : K_r14[12];
assign K16[13] = mode ? K_r14[53] : K_r14[46];
assign K16[14] = mode ? K_r14[25] : K_r14[18];
assign K16[15] = mode ? K_r14[33] : K_r14[26];
assign K16[16] = mode ? K_r14[34] : K_r14[27];
assign K16[17] = mode ? K_r14[17] : K_r14[10];
assign K16[18] = mode ? K_r14[5] : K_r14[55];
assign K16[19] = mode ? K_r14[4] : K_r14[54];
assign K16[20] = mode ? K_r14[55] : K_r14[48];
assign K16[21] = mode ? K_r14[24] : K_r14[17];
assign K16[22] = mode ? K_r14[32] : K_r14[25];
assign K16[23] = mode ? K_r14[40] : K_r14[33];
assign K16[24] = mode ? K_r14[20] : K_r14[13];
assign K16[25] = mode ? K_r14[36] : K_r14[29];
assign K16[26] = mode ? K_r14[31] : K_r14[51];
assign K16[27] = mode ? K_r14[21] : K_r14[14];
assign K16[28] = mode ? K_r14[8] : K_r14[1];
assign K16[29] = mode ? K_r14[23] : K_r14[16];
assign K16[30] = mode ? K_r14[52] : K_r14[45];
assign K16[31] = mode ? K_r14[14] : K_r14[7];
assign K16[32] = mode ? K_r14[29] : K_r14[22];
assign K16[33] = mode ? K_r14[51] : K_r14[44];
assign K16[34] = mode ? K_r14[9] : K_r14[2];
assign K16[35] = mode ? K_r14[35] : K_r14[28];
assign K16[36] = mode ? K_r14[30] : K_r14[23];
assign K16[37] = mode ? K_r14[2] : K_r14[50];
assign K16[38] = mode ? K_r14[37] : K_r14[30];
assign K16[39] = mode ? K_r14[22] : K_r14[15];
assign K16[40] = mode ? K_r14[0] : K_r14[52];
assign K16[41] = mode ? K_r14[42] : K_r14[35];
assign K16[42] = mode ? K_r14[38] : K_r14[31];
assign K16[43] = mode ? K_r14[16] : K_r14[9];
assign K16[44] = mode ? K_r14[43] : K_r14[36];
assign K16[45] = mode ? K_r14[44] : K_r14[37];
assign K16[46] = mode ? K_r14[1] : K_r14[49];
assign K16[47] = mode ? K_r14[7] : K_r14[0];
assign K16[48] = mode ? K_r14[28] : K_r14[21];

assign K15[1]  = mode ? K_r13[54] : K_r13[33];
assign K15[2]  = mode ? K_r13[18] : K_r13[54];
assign K15[3]  = mode ? K_r13[33] : K_r13[12];
assign K15[4]  = mode ? K_r13[10] : K_r13[46];
assign K15[5]  = mode ? K_r13[20] : K_r13[24];
assign K15[6]  = mode ? K_r13[48] : K_r13[27];
assign K15[7]  = mode ? K_r13[34] : K_r13[13];
assign K15[8]  = mode ? K_r13[13] : K_r13[17];
assign K15[9]  = mode ? K_r13[4] : K_r13[40];
assign K15[10] = mode ? K_r13[55] : K_r13[34];
assign K15[11] = mode ? K_r13[46] : K_r13[25];
assign K15[12] = mode ? K_r13[26] : K_r13[5];
assign K15[13] = mode ? K_r13[3] : K_r13[39];
assign K15[14] = mode ? K_r13[32] : K_r13[11];
assign K15[15] = mode ? K_r13[40] : K_r13[19];
assign K15[16] = mode ? K_r13[41] : K_r13[20];
assign K15[17] = mode ? K_r13[24] : K_r13[3];
assign K15[18] = mode ? K_r13[12] : K_r13[48];
assign K15[19] = mode ? K_r13[11] : K_r13[47];
assign K15[20] = mode ? K_r13[5] : K_r13[41];
assign K15[21] = mode ? K_r13[6] : K_r13[10];
assign K15[22] = mode ? K_r13[39] : K_r13[18];
assign K15[23] = mode ? K_r13[47] : K_r13[26];
assign K15[24] = mode ? K_r13[27] : K_r13[6];
assign K15[25] = mode ? K_r13[43] : K_r13[22];
assign K15[26] = mode ? K_r13[38] : K_r13[44];
assign K15[27] = mode ? K_r13[28] : K_r13[7];
assign K15[28] = mode ? K_r13[15] : K_r13[49];
assign K15[29] = mode ? K_r13[30] : K_r13[9];
assign K15[30] = mode ? K_r13[0] : K_r13[38];
assign K15[31] = mode ? K_r13[21] : K_r13[0];
assign K15[32] = mode ? K_r13[36] : K_r13[15];
assign K15[33] = mode ? K_r13[31] : K_r13[37];
assign K15[34] = mode ? K_r13[16] : K_r13[50];
assign K15[35] = mode ? K_r13[42] : K_r13[21];
assign K15[36] = mode ? K_r13[37] : K_r13[16];
assign K15[37] = mode ? K_r13[9] : K_r13[43];
assign K15[38] = mode ? K_r13[44] : K_r13[23];
assign K15[39] = mode ? K_r13[29] : K_r13[8];
assign K15[40] = mode ? K_r13[7] : K_r13[45];
assign K15[41] = mode ? K_r13[49] : K_r13[28];
assign K15[42] = mode ? K_r13[45] : K_r13[51];
assign K15[43] = mode ? K_r13[23] : K_r13[2];
assign K15[44] = mode ? K_r13[50] : K_r13[29];
assign K15[45] = mode ? K_r13[51] : K_r13[30];
assign K15[46] = mode ? K_r13[8] : K_r13[42];
assign K15[47] = mode ? K_r13[14] : K_r13[52];
assign K15[48] = mode ? K_r13[35] : K_r13[14];

assign K14[1]  = mode ? K_r12[11] : K_r12[19];
assign K14[2]  = mode ? K_r12[32] : K_r12[40];
assign K14[3]  = mode ? K_r12[47] : K_r12[55];
assign K14[4]  = mode ? K_r12[24] : K_r12[32];
assign K14[5]  = mode ? K_r12[34] : K_r12[10];
assign K14[6]  = mode ? K_r12[5] : K_r12[13];
assign K14[7]  = mode ? K_r12[48] : K_r12[24];
assign K14[8]  = mode ? K_r12[27] : K_r12[3];
assign K14[9]  = mode ? K_r12[18] : K_r12[26];
assign K14[10] = mode ? K_r12[12] : K_r12[20];
assign K14[11] = mode ? K_r12[3] : K_r12[11];
assign K14[12] = mode ? K_r12[40] : K_r12[48];
assign K14[13] = mode ? K_r12[17] : K_r12[25];
assign K14[14] = mode ? K_r12[46] : K_r12[54];
assign K14[15] = mode ? K_r12[54] : K_r12[5];
assign K14[16] = mode ? K_r12[55] : K_r12[6];
assign K14[17] = mode ? K_r12[13] : K_r12[46];
assign K14[18] = mode ? K_r12[26] : K_r12[34];
assign K14[19] = mode ? K_r12[25] : K_r12[33];
assign K14[20] = mode ? K_r12[19] : K_r12[27];
assign K14[21] = mode ? K_r12[20] : K_r12[53];
assign K14[22] = mode ? K_r12[53] : K_r12[4];
assign K14[23] = mode ? K_r12[4] : K_r12[12];
assign K14[24] = mode ? K_r12[41] : K_r12[17];
assign K14[25] = mode ? K_r12[2] : K_r12[8];
assign K14[26] = mode ? K_r12[52] : K_r12[30];
assign K14[27] = mode ? K_r12[42] : K_r12[52];
assign K14[28] = mode ? K_r12[29] : K_r12[35];
assign K14[29] = mode ? K_r12[44] : K_r12[50];
assign K14[30] = mode ? K_r12[14] : K_r12[51];
assign K14[31] = mode ? K_r12[35] : K_r12[45];
assign K14[32] = mode ? K_r12[50] : K_r12[1];
assign K14[33] = mode ? K_r12[45] : K_r12[23];
assign K14[34] = mode ? K_r12[30] : K_r12[36];
assign K14[35] = mode ? K_r12[1] : K_r12[7];
assign K14[36] = mode ? K_r12[51] : K_r12[2];
assign K14[37] = mode ? K_r12[23] : K_r12[29];
assign K14[38] = mode ? K_r12[31] : K_r12[9];
assign K14[39] = mode ? K_r12[43] : K_r12[49];
assign K14[40] = mode ? K_r12[21] : K_r12[31];
assign K14[41] = mode ? K_r12[8] : K_r12[14];
assign K14[42] = mode ? K_r12[0] : K_r12[37];
assign K14[43] = mode ? K_r12[37] : K_r12[43];
assign K14[44] = mode ? K_r12[9] : K_r12[15];
assign K14[45] = mode ? K_r12[38] : K_r12[16];
assign K14[46] = mode ? K_r12[22] : K_r12[28];
assign K14[47] = mode ? K_r12[28] : K_r12[38];
assign K14[48] = mode ? K_r12[49] : K_r12[0];

assign K13[1]  = mode ? K_r11[25] : K_r11[5];
assign K13[2]  = mode ? K_r11[46] : K_r11[26];
assign K13[3]  = mode ? K_r11[4] : K_r11[41];
assign K13[4]  = mode ? K_r11[13] : K_r11[18];
assign K13[5]  = mode ? K_r11[48] : K_r11[53];
assign K13[6]  = mode ? K_r11[19] : K_r11[24];
assign K13[7]  = mode ? K_r11[5] : K_r11[10];
assign K13[8]  = mode ? K_r11[41] : K_r11[46];
assign K13[9]  = mode ? K_r11[32] : K_r11[12];
assign K13[10] = mode ? K_r11[26] : K_r11[6];
assign K13[11] = mode ? K_r11[17] : K_r11[54];
assign K13[12] = mode ? K_r11[54] : K_r11[34];
assign K13[13] = mode ? K_r11[6] : K_r11[11];
assign K13[14] = mode ? K_r11[3] : K_r11[40];
assign K13[15] = mode ? K_r11[11] : K_r11[48];
assign K13[16] = mode ? K_r11[12] : K_r11[17];
assign K13[17] = mode ? K_r11[27] : K_r11[32];
assign K13[18] = mode ? K_r11[40] : K_r11[20];
assign K13[19] = mode ? K_r11[39] : K_r11[19];
assign K13[20] = mode ? K_r11[33] : K_r11[13];
assign K13[21] = mode ? K_r11[34] : K_r11[39];
assign K13[22] = mode ? K_r11[10] : K_r11[47];
assign K13[23] = mode ? K_r11[18] : K_r11[55];
assign K13[24] = mode ? K_r11[55] : K_r11[3];
assign K13[25] = mode ? K_r11[16] : K_r11[49];
assign K13[26] = mode ? K_r11[7] : K_r11[16];
assign K13[27] = mode ? K_r11[1] : K_r11[38];
assign K13[28] = mode ? K_r11[43] : K_r11[21];
assign K13[29] = mode ? K_r11[31] : K_r11[36];
assign K13[30] = mode ? K_r11[28] : K_r11[37];
assign K13[31] = mode ? K_r11[49] : K_r11[31];
assign K13[32] = mode ? K_r11[9] : K_r11[42];
assign K13[33] = mode ? K_r11[0] : K_r11[9];
assign K13[34] = mode ? K_r11[44] : K_r11[22];
assign K13[35] = mode ? K_r11[15] : K_r11[52];
assign K13[36] = mode ? K_r11[38] : K_r11[43];
assign K13[37] = mode ? K_r11[37] : K_r11[15];
assign K13[38] = mode ? K_r11[45] : K_r11[50];
assign K13[39] = mode ? K_r11[2] : K_r11[35];
assign K13[40] = mode ? K_r11[35] : K_r11[44];
assign K13[41] = mode ? K_r11[22] : K_r11[0];
assign K13[42] = mode ? K_r11[14] : K_r11[23];
assign K13[43] = mode ? K_r11[51] : K_r11[29];
assign K13[44] = mode ? K_r11[23] : K_r11[1];
assign K13[45] = mode ? K_r11[52] : K_r11[2];
assign K13[46] = mode ? K_r11[36] : K_r11[14];
assign K13[47] = mode ? K_r11[42] : K_r11[51];
assign K13[48] = mode ? K_r11[8] : K_r11[45];

assign K12[1]  = mode ? K_r10[39] : K_r10[48];
assign K12[2]  = mode ? K_r10[3] : K_r10[12];
assign K12[3]  = mode ? K_r10[18] : K_r10[27];
assign K12[4]  = mode ? K_r10[27] : K_r10[4];
assign K12[5]  = mode ? K_r10[5] : K_r10[39];
assign K12[6]  = mode ? K_r10[33] : K_r10[10];
assign K12[7]  = mode ? K_r10[19] : K_r10[53];
assign K12[8]  = mode ? K_r10[55] : K_r10[32];
assign K12[9]  = mode ? K_r10[46] : K_r10[55];
assign K12[10] = mode ? K_r10[40] : K_r10[17];
assign K12[11] = mode ? K_r10[6] : K_r10[40];
assign K12[12] = mode ? K_r10[11] : K_r10[20];
assign K12[13] = mode ? K_r10[20] : K_r10[54];
assign K12[14] = mode ? K_r10[17] : K_r10[26];
assign K12[15] = mode ? K_r10[25] : K_r10[34];
assign K12[16] = mode ? K_r10[26] : K_r10[3];
assign K12[17] = mode ? K_r10[41] : K_r10[18];
assign K12[18] = mode ? K_r10[54] : K_r10[6];
assign K12[19] = mode ? K_r10[53] : K_r10[5];
assign K12[20] = mode ? K_r10[47] : K_r10[24];
assign K12[21] = mode ? K_r10[48] : K_r10[25];
assign K12[22] = mode ? K_r10[24] : K_r10[33];
assign K12[23] = mode ? K_r10[32] : K_r10[41];
assign K12[24] = mode ? K_r10[12] : K_r10[46];
assign K12[25] = mode ? K_r10[30] : K_r10[35];