Subversion Repositories ddr3_synthesizable_bfm

/*

Multibits Shift Register

2010-2011 sclai <laikos@yahoo.com>

This library is free software; you can redistribute it and/or modify it

 under the terms of the GNU Lesser General Public License as published by

 the Free Software Foundation; either version 2.1 of the License,

 or (at your option) any later version.

 This library is distributed in the hope that it will be useful, but

 WITHOUT ANY WARRANTY; without even the implied warranty of

 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public

 License along with this library; if not, write to the Free Software

 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

 USA

*/

module ddr3_sr36 #(

parameter PIPE_LEN=7

)(

input wire        clk,

input wire [35:0] shift_in,

output wire [35:0]shift_out

);

//register to hold value

reg [PIPE_LEN-1:0] d0;

reg [PIPE_LEN-1:0] d1;

reg [PIPE_LEN-1:0] d2;

reg [PIPE_LEN-1:0] d3;

reg [PIPE_LEN-1:0] d4;

reg [PIPE_LEN-1:0] d5;

reg [PIPE_LEN-1:0] d6;

reg [PIPE_LEN-1:0] d7;

reg [PIPE_LEN-1:0] d8;

reg [PIPE_LEN-1:0] d9;

reg [PIPE_LEN-1:0] d10;

reg [PIPE_LEN-1:0] d11;

reg [PIPE_LEN-1:0] d12;

reg [PIPE_LEN-1:0] d13;

reg [PIPE_LEN-1:0] d14;

reg [PIPE_LEN-1:0] d15;

reg [PIPE_LEN-1:0] d16;

reg [PIPE_LEN-1:0] d17;

reg [PIPE_LEN-1:0] d18;

reg [PIPE_LEN-1:0] d19;

reg [PIPE_LEN-1:0] d20;

reg [PIPE_LEN-1:0] d21;

reg [PIPE_LEN-1:0] d22;

reg [PIPE_LEN-1:0] d23;

reg [PIPE_LEN-1:0] d24;

reg [PIPE_LEN-1:0] d25;

reg [PIPE_LEN-1:0] d26;

reg [PIPE_LEN-1:0] d27;

reg [PIPE_LEN-1:0] d28;

reg [PIPE_LEN-1:0] d29;

reg [PIPE_LEN-1:0] d30;

reg [PIPE_LEN-1:0] d31;

reg [PIPE_LEN-1:0] d32;

reg [PIPE_LEN-1:0] d33;

reg [PIPE_LEN-1:0] d34;

reg [PIPE_LEN-1:0] d35;

always @(posedge clk)

begin

  d35 <={shift_in[35],d35[PIPE_LEN-1:1]};

  d34 <={shift_in[34],d34[PIPE_LEN-1:1]};

  d33 <={shift_in[33],d33[PIPE_LEN-1:1]};

  d32 <={shift_in[32],d32[PIPE_LEN-1:1]};

  d31 <={shift_in[31],d31[PIPE_LEN-1:1]};

  d30 <={shift_in[30],d30[PIPE_LEN-1:1]};

  d29 <={shift_in[29],d29[PIPE_LEN-1:1]};

  d28 <={shift_in[28],d28[PIPE_LEN-1:1]};

  d27 <={shift_in[27],d27[PIPE_LEN-1:1]};

  d26 <={shift_in[26],d26[PIPE_LEN-1:1]};

  d25 <={shift_in[25],d25[PIPE_LEN-1:1]};

  d24 <={shift_in[24],d24[PIPE_LEN-1:1]};

  d23 <={shift_in[23],d23[PIPE_LEN-1:1]};

  d22 <={shift_in[22],d22[PIPE_LEN-1:1]};

  d21 <={shift_in[21],d21[PIPE_LEN-1:1]};

  d20 <={shift_in[20],d20[PIPE_LEN-1:1]};

  d19 <={shift_in[19],d19[PIPE_LEN-1:1]};

  d18 <={shift_in[18],d18[PIPE_LEN-1:1]};

  d17 <={shift_in[17],d17[PIPE_LEN-1:1]};

  d16 <={shift_in[16],d16[PIPE_LEN-1:1]};

  d15 <={shift_in[15],d15[PIPE_LEN-1:1]};

  d14 <={shift_in[14],d14[PIPE_LEN-1:1]};

  d13 <={shift_in[13],d13[PIPE_LEN-1:1]};

  d12 <={shift_in[12],d12[PIPE_LEN-1:1]};

  d11 <={shift_in[11],d11[PIPE_LEN-1:1]};

  d10 <={shift_in[10],d10[PIPE_LEN-1:1]};

  d9  <={shift_in[ 9], d9[PIPE_LEN-1:1]};

  d8  <={shift_in[ 8], d8[PIPE_LEN-1:1]};

  d7  <={shift_in[ 7], d7[PIPE_LEN-1:1]};

  d6  <={shift_in[ 6], d6[PIPE_LEN-1:1]};

  d5  <={shift_in[ 5], d5[PIPE_LEN-1:1]};

  d4  <={shift_in[ 4], d4[PIPE_LEN-1:1]};

  d3  <={shift_in[ 3], d3[PIPE_LEN-1:1]};

  d2  <={shift_in[ 2], d2[PIPE_LEN-1:1]};

  d1  <={shift_in[ 1], d1[PIPE_LEN-1:1]};

  d0  <={shift_in[ 0], d0[PIPE_LEN-1:1]};

end

assign shift_out={d35[0],d34[0],d33[0],d32[0],

d31[0],d30[0],d29[0],d28[0],d27[0],d26[0],d25[0],d24[0],

d23[0],d22[0],d21[0],d20[0],d19[0],d18[0],d17[0],d16[0],

d15[0],d14[0],d13[0],d12[0],d11[0],d10[0],d9[0],d8[0],

d7[0],d6[0],d5[0],d4[0],d3[0],d2[0],d1[0],d0[0]

};

endmodule