/////////////////////////////////////////////////////////////////////////                                                             ////////  KEY_SEL                                                    ////////  Generate 16 pipelined sub-keys                             ////////                                                             ////////  Author: Rudolf Usselmann                                   ////////          rudi@asics.ws                                      ////////                                                             /////////////////////////////////////////////////////////////////////////////                                                             //////// Copyright (C) 2001 Rudolf Usselmann                         ////////                    rudi@asics.ws                            ////////                                                             //////// This source file may be used and distributed without        //////// restriction provided that this copyright statement is not   //////// removed from the file and that any derivative work contains //////// the original copyright notice and the associated disclaimer.////////                                                             ////////     THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY     //////// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   //////// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS   //////// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR      //////// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,         //////// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    //////// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE   //////// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR        //////// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF  //////// LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT  //////// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT  //////// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE         //////// POSSIBILITY OF SUCH DAMAGE.                                 ////////                                                             /////////////////////////////////////////////////////////////////////////module  key_sel(clk, K, decrypt, K1, K2, K3, K4, K5, K6, K7, K8, K9,		K10, K11, K12, K13, K14, K15, K16);input		clk;input	[55:0]	K;input decrypt;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 clk)   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;   endassign K16[1] = decrypt ? K_r14[47] : K_r14[40];assign K16[2] = decrypt ? K_r14[11] : K_r14[4];assign K16[3] = decrypt ? K_r14[26] : K_r14[19];assign K16[4] = decrypt ? K_r14[3] : K_r14[53];assign K16[5] = decrypt ? K_r14[13] : K_r14[6];assign K16[6] = decrypt ? K_r14[41] : K_r14[34];assign K16[7] = decrypt ? K_r14[27] : K_r14[20];assign K16[8] = decrypt ? K_r14[6] : K_r14[24];assign K16[9] = decrypt ? K_r14[54] : K_r14[47];assign K16[10] = decrypt ? K_r14[48] : K_r14[41];assign K16[11] = decrypt ? K_r14[39] : K_r14[32];assign K16[12] = decrypt ? K_r14[19] : K_r14[12];assign K16[13] = decrypt ? K_r14[53] : K_r14[46];assign K16[14] = decrypt ? K_r14[25] : K_r14[18];assign K16[15] = decrypt ? K_r14[33] : K_r14[26];assign K16[16] = decrypt ? K_r14[34] : K_r14[27];assign K16[17] = decrypt ? K_r14[17] : K_r14[10];assign K16[18] = decrypt ? K_r14[5] : K_r14[55];assign K16[19] = decrypt ? K_r14[4] : K_r14[54];assign K16[20] = decrypt ? K_r14[55] : K_r14[48];assign K16[21] = decrypt ? K_r14[24] : K_r14[17];assign K16[22] = decrypt ? K_r14[32] : K_r14[25];assign K16[23] = decrypt ? K_r14[40] : K_r14[33];assign K16[24] = decrypt ? K_r14[20] : K_r14[13];assign K16[25] = decrypt ? K_r14[36] : K_r14[29];assign K16[26] = decrypt ? K_r14[31] : K_r14[51];assign K16[27] = decrypt ? K_r14[21] : K_r14[14];assign K16[28] = decrypt ? K_r14[8] : K_r14[1];assign K16[29] = decrypt ? K_r14[23] : K_r14[16];assign K16[30] = decrypt ? K_r14[52] : K_r14[45];assign K16[31] = decrypt ? K_r14[14] : K_r14[7];assign K16[32] = decrypt ? K_r14[29] : K_r14[22];assign K16[33] = decrypt ? K_r14[51] : K_r14[44];assign K16[34] = decrypt ? K_r14[9] : K_r14[2];assign K16[35] = decrypt ? K_r14[35] : K_r14[28];assign K16[36] = decrypt ? K_r14[30] : K_r14[23];assign K16[37] = decrypt ? K_r14[2] : K_r14[50];assign K16[38] = decrypt ? K_r14[37] : K_r14[30];assign K16[39] = decrypt ? K_r14[22] : K_r14[15];assign K16[40] = decrypt ? K_r14[0] : K_r14[52];assign K16[41] = decrypt ? K_r14[42] : K_r14[35];assign K16[42] = decrypt ? K_r14[38] : K_r14[31];assign K16[43] = decrypt ? K_r14[16] : K_r14[9];assign K16[44] = decrypt ? K_r14[43] : K_r14[36];assign K16[45] = decrypt ? K_r14[44] : K_r14[37];assign K16[46] = decrypt ? K_r14[1] : K_r14[49];assign K16[47] = decrypt ? K_r14[7] : K_r14[0];assign K16[48] = decrypt ? K_r14[28] : K_r14[21];assign K15[1] = decrypt ? K_r13[54] : K_r13[33];assign K15[2] = decrypt ? K_r13[18] : K_r13[54];assign K15[3] = decrypt ? K_r13[33] : K_r13[12];assign K15[4] = decrypt ? K_r13[10] : K_r13[46];assign K15[5] = decrypt ? K_r13[20] : K_r13[24];assign K15[6] = decrypt ? K_r13[48] : K_r13[27];assign K15[7] = decrypt ? K_r13[34] : K_r13[13];assign K15[8] = decrypt ? K_r13[13] : K_r13[17];assign K15[9] = decrypt ? K_r13[4] : K_r13[40];assign K15[10] = decrypt ? K_r13[55] : K_r13[34];assign K15[11] = decrypt ? K_r13[46] : K_r13[25];assign K15[12] = decrypt ? K_r13[26] : K_r13[5];assign K15[13] = decrypt ? K_r13[3] : K_r13[39];assign K15[14] = decrypt ? K_r13[32] : K_r13[11];assign K15[15] = decrypt ? K_r13[40] : K_r13[19];assign K15[16] = decrypt ? K_r13[41] : K_r13[20];assign K15[17] = decrypt ? K_r13[24] : K_r13[3];assign K15[18] = decrypt ? K_r13[12] : K_r13[48];assign K15[19] = decrypt ? K_r13[11] : K_r13[47];assign K15[20] = decrypt ? K_r13[5] : K_r13[41];assign K15[21] = decrypt ? K_r13[6] : K_r13[10];assign K15[22] = decrypt ? K_r13[39] : K_r13[18];assign K15[23] = decrypt ? K_r13[47] : K_r13[26];assign K15[24] = decrypt ? K_r13[27] : K_r13[6];assign K15[25] = decrypt ? K_r13[43] : K_r13[22];assign K15[26] = decrypt ? K_r13[38] : K_r13[44];assign K15[27] = decrypt ? K_r13[28] : K_r13[7];assign K15[28] = decrypt ? K_r13[15] : K_r13[49];assign K15[29] = decrypt ? K_r13[30] : K_r13[9];assign K15[30] = decrypt ? K_r13[0] : K_r13[38];assign K15[31] = decrypt ? K_r13[21] : K_r13[0];assign K15[32] = decrypt ? K_r13[36] : K_r13[15];assign K15[33] = decrypt ? K_r13[31] : K_r13[37];assign K15[34] = decrypt ? K_r13[16] : K_r13[50];assign K15[35] = decrypt ? K_r13[42] : K_r13[21];assign K15[36] = decrypt ? K_r13[37] : K_r13[16];assign K15[37] = decrypt ? K_r13[9] : K_r13[43];assign K15[38] = decrypt ? K_r13[44] : K_r13[23];assign K15[39] = decrypt ? K_r13[29] : K_r13[8];assign K15[40] = decrypt ? K_r13[7] : K_r13[45];assign K15[41] = decrypt ? K_r13[49] : K_r13[28];assign K15[42] = decrypt ? K_r13[45] : K_r13[51];assign K15[43] = decrypt ? K_r13[23] : K_r13[2];assign K15[44] = decrypt ? K_r13[50] : K_r13[29];assign K15[45] = decrypt ? K_r13[51] : K_r13[30];assign K15[46] = decrypt ? K_r13[8] : K_r13[42];assign K15[47] = decrypt ? K_r13[14] : K_r13[52];assign K15[48] = decrypt ? K_r13[35] : K_r13[14];assign K14[1] = decrypt ? K_r12[11] : K_r12[19];assign K14[2] = decrypt ? K_r12[32] : K_r12[40];assign K14[3] = decrypt ? K_r12[47] : K_r12[55];assign K14[4] = decrypt ? K_r12[24] : K_r12[32];assign K14[5] = decrypt ? K_r12[34] : K_r12[10];assign K14[6] = decrypt ? K_r12[5] : K_r12[13];assign K14[7] = decrypt ? K_r12[48] : K_r12[24];assign K14[8] = decrypt ? K_r12[27] : K_r12[3];assign K14[9] = decrypt ? K_r12[18] : K_r12[26];assign K14[10] = decrypt ? K_r12[12] : K_r12[20];assign K14[11] = decrypt ? K_r12[3] : K_r12[11];assign K14[12] = decrypt ? K_r12[40] : K_r12[48];assign K14[13] = decrypt ? K_r12[17] : K_r12[25];assign K14[14] = decrypt ? K_r12[46] : K_r12[54];assign K14[15] = decrypt ? K_r12[54] : K_r12[5];assign K14[16] = decrypt ? K_r12[55] : K_r12[6];assign K14[17] = decrypt ? K_r12[13] : K_r12[46];assign K14[18] = decrypt ? K_r12[26] : K_r12[34];assign K14[19] = decrypt ? K_r12[25] : K_r12[33];assign K14[20] = decrypt ? K_r12[19] : K_r12[27];assign K14[21] = decrypt ? K_r12[20] : K_r12[53];assign K14[22] = decrypt ? K_r12[53] : K_r12[4];assign K14[23] = decrypt ? K_r12[4] : K_r12[12];assign K14[24] = decrypt ? K_r12[41] : K_r12[17];assign K14[25] = decrypt ? K_r12[2] : K_r12[8];assign K14[26] = decrypt ? K_r12[52] : K_r12[30];assign K14[27] = decrypt ? K_r12[42] : K_r12[52];assign K14[28] = decrypt ? K_r12[29] : K_r12[35];assign K14[29] = decrypt ? K_r12[44] : K_r12[50];assign K14[30] = decrypt ? K_r12[14] : K_r12[51];assign K14[31] = decrypt ? K_r12[35] : K_r12[45];assign K14[32] = decrypt ? K_r12[50] : K_r12[1];assign K14[33] = decrypt ? K_r12[45] : K_r12[23];assign K14[34] = decrypt ? K_r12[30] : K_r12[36];assign K14[35] = decrypt ? K_r12[1] : K_r12[7];assign K14[36] = decrypt ? K_r12[51] : K_r12[2];assign K14[37] = decrypt ? K_r12[23] : K_r12[29];assign K14[38] = decrypt ? K_r12[31] : K_r12[9];assign K14[39] = decrypt ? K_r12[43] : K_r12[49];assign K14[40] = decrypt ? K_r12[21] : K_r12[31];assign K14[41] = decrypt ? K_r12[8] : K_r12[14];assign K14[42] = decrypt ? K_r12[0] : K_r12[37];assign K14[43] = decrypt ? K_r12[37] : K_r12[43];assign K14[44] = decrypt ? K_r12[9] : K_r12[15];assign K14[45] = decrypt ? K_r12[38] : K_r12[16];assign K14[46] = decrypt ? K_r12[22] : K_r12[28];assign K14[47] = decrypt ? K_r12[28] : K_r12[38];assign K14[48] = decrypt ? K_r12[49] : K_r12[0];assign K13[1] = decrypt ? K_r11[25] : K_r11[5];assign K13[2] = decrypt ? K_r11[46] : K_r11[26];assign K13[3] = decrypt ? K_r11[4] : K_r11[41];assign K13[4] = decrypt ? K_r11[13] : K_r11[18];assign K13[5] = decrypt ? K_r11[48] : K_r11[53];assign K13[6] = decrypt ? K_r11[19] : K_r11[24];assign K13[7] = decrypt ? K_r11[5] : K_r11[10];assign K13[8] = decrypt ? K_r11[41] : K_r11[46];assign K13[9] = decrypt ? K_r11[32] : K_r11[12];assign K13[10] = decrypt ? K_r11[26] : K_r11[6];assign K13[11] = decrypt ? K_r11[17] : K_r11[54];assign K13[12] = decrypt ? K_r11[54] : K_r11[34];assign K13[13] = decrypt ? K_r11[6] : K_r11[11];assign K13[14] = decrypt ? K_r11[3] : K_r11[40];assign K13[15] = decrypt ? K_r11[11] : K_r11[48];assign K13[16] = decrypt ? K_r11[12] : K_r11[17];assign K13[17] = decrypt ? K_r11[27] : K_r11[32];assign K13[18] = decrypt ? K_r11[40] : K_r11[20];assign K13[19] = decrypt ? K_r11[39] : K_r11[19];assign K13[20] = decrypt ? K_r11[33] : K_r11[13];assign K13[21] = decrypt ? K_r11[34] : K_r11[39];assign K13[22] = decrypt ? K_r11[10] : K_r11[47];assign K13[23] = decrypt ? K_r11[18] : K_r11[55];assign K13[24] = decrypt ? K_r11[55] : K_r11[3];assign K13[25] = decrypt ? K_r11[16] : K_r11[49];assign K13[26] = decrypt ? K_r11[7] : K_r11[16];assign K13[27] = decrypt ? K_r11[1] : K_r11[38];assign K13[28] = decrypt ? K_r11[43] : K_r11[21];assign K13[29] = decrypt ? K_r11[31] : K_r11[36];assign K13[30] = decrypt ? K_r11[28] : K_r11[37];assign K13[31] = decrypt ? K_r11[49] : K_r11[31];assign K13[32] = decrypt ? K_r11[9] : K_r11[42];assign K13[33] = decrypt ? K_r11[0] : K_r11[9];assign K13[34] = decrypt ? K_r11[44] : K_r11[22];assign K13[35] = decrypt ? K_r11[15] : K_r11[52];assign K13[36] = decrypt ? K_r11[38] : K_r11[43];assign K13[37] = decrypt ? K_r11[37] : K_r11[15];assign K13[38] = decrypt ? K_r11[45] : K_r11[50];assign K13[39] = decrypt ? K_r11[2] : K_r11[35];assign K13[40] = decrypt ? K_r11[35] : K_r11[44];assign K13[41] = decrypt ? K_r11[22] : K_r11[0];assign K13[42] = decrypt ? K_r11[14] : K_r11[23];assign K13[43] = decrypt ? K_r11[51] : K_r11[29];assign K13[44] = decrypt ? K_r11[23] : K_r11[1];assign K13[45] = decrypt ? K_r11[52] : K_r11[2];assign K13[46] = decrypt ? K_r11[36] : K_r11[14];assign K13[47] = decrypt ? K_r11[42] : K_r11[51];assign K13[48] = decrypt ? K_r11[8] : K_r11[45];assign K12[1] = decrypt ? K_r10[39] : K_r10[48];assign K12[2] = decrypt ? K_r10[3] : K_r10[12];assign K12[3] = decrypt ? K_r10[18] : K_r10[27];assign K12[4] = decrypt ? K_r10[27] : K_r10[4];assign K12[5] = decrypt ? K_r10[5] : K_r10[39];assign K12[6] = decrypt ? K_r10[33] : K_r10[10];assign K12[7] = decrypt ? K_r10[19] : K_r10[53];assign K12[8] = decrypt ? K_r10[55] : K_r10[32];assign K12[9] = decrypt ? K_r10[46] : K_r10[55];assign K12[10] = decrypt ? K_r10[40] : K_r10[17];assign K12[11] = decrypt ? K_r10[6] : K_r10[40];assign K12[12] = decrypt ? K_r10[11] : K_r10[20];assign K12[13] = decrypt ? K_r10[20] : K_r10[54];assign K12[14] = decrypt ? K_r10[17] : K_r10[26];assign K12[15] = decrypt ? K_r10[25] : K_r10[34];assign K12[16] = decrypt ? K_r10[26] : K_r10[3];assign K12[17] = decrypt ? K_r10[41] : K_r10[18];assign K12[18] = decrypt ? K_r10[54] : K_r10[6];assign K12[19] = decrypt ? K_r10[53] : K_r10[5];assign K12[20] = decrypt ? K_r10[47] : K_r10[24];assign K12[21] = decrypt ? K_r10[48] : K_r10[25];assign K12[22] = decrypt ? K_r10[24] : K_r10[33];