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rudi |
/////////////////////////////////////////////////////////////////////
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//// ////
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//// WISHBONE Connection Matrix Register File ////
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//// ////
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//// ////
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//// Author: Rudolf Usselmann ////
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//// rudi@asics.ws ////
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//// ////
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//// ////
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//// Downloaded from: http://www.opencores.org/cores/wb_ic/ ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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//// ////
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//// Copyright (C) 2001 Rudolf Usselmann ////
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//// rudi@asics.ws ////
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//// ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer.////
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//// ////
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//// THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY ////
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//// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED ////
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//// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS ////
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//// FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR ////
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//// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ////
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//// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ////
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//// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE ////
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//// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR ////
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//// BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF ////
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//// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ////
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//// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT ////
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//// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE ////
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//// POSSIBILITY OF SUCH DAMAGE. ////
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//// ////
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/////////////////////////////////////////////////////////////////////
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// CVS Log
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//
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// $Id: wb_conmax_rf.v,v 1.1.1.1 2001-10-19 11:01:42 rudi Exp $
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//
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// $Date: 2001-10-19 11:01:42 $
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// $Revision: 1.1.1.1 $
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// $Author: rudi $
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// $Locker: $
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// $State: Exp $
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//
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// Change History:
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// $Log: not supported by cvs2svn $
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//
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//
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//
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//
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`include "wb_conmax_defines.v"
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module wb_conmax_rf(
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clk_i, rst_i,
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// Internal Wishbone Interface
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i_wb_data_i, i_wb_data_o, i_wb_addr_i, i_wb_sel_i, i_wb_we_i, i_wb_cyc_i,
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i_wb_stb_i, i_wb_ack_o, i_wb_err_o, i_wb_rty_o,
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// External Wishbone Interface
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e_wb_data_i, e_wb_data_o, e_wb_addr_o, e_wb_sel_o, e_wb_we_o, e_wb_cyc_o,
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e_wb_stb_o, e_wb_ack_i, e_wb_err_i, e_wb_rty_i,
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// Configuration Registers
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conf0, conf1, conf2, conf3, conf4, conf5, conf6, conf7,
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conf8, conf9, conf10, conf11, conf12, conf13, conf14, conf15
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);
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////////////////////////////////////////////////////////////////////
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//
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// Module Parameters
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//
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parameter [3:0] rf_addr = 4'hf;
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parameter dw = 32; // Data bus Width
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parameter aw = 32; // Address bus Width
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parameter sw = dw / 8; // Number of Select Lines
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////////////////////////////////////////////////////////////////////
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//
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// Module IOs
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//
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input clk_i, rst_i;
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// Internal Wishbone Interface
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input [dw-1:0] i_wb_data_i;
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output [dw-1:0] i_wb_data_o;
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input [aw-1:0] i_wb_addr_i;
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input [sw-1:0] i_wb_sel_i;
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input i_wb_we_i;
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input i_wb_cyc_i;
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input i_wb_stb_i;
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output i_wb_ack_o;
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output i_wb_err_o;
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output i_wb_rty_o;
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// External Wishbone Interface
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input [dw-1:0] e_wb_data_i;
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output [dw-1:0] e_wb_data_o;
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output [aw-1:0] e_wb_addr_o;
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output [sw-1:0] e_wb_sel_o;
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output e_wb_we_o;
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output e_wb_cyc_o;
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output e_wb_stb_o;
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input e_wb_ack_i;
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input e_wb_err_i;
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input e_wb_rty_i;
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// Configuration Registers
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output [15:0] conf0;
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output [15:0] conf1;
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output [15:0] conf2;
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output [15:0] conf3;
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output [15:0] conf4;
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output [15:0] conf5;
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output [15:0] conf6;
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output [15:0] conf7;
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output [15:0] conf8;
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output [15:0] conf9;
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output [15:0] conf10;
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output [15:0] conf11;
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output [15:0] conf12;
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output [15:0] conf13;
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output [15:0] conf14;
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output [15:0] conf15;
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////////////////////////////////////////////////////////////////////
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//
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// Local Wires
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//
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reg [15:0] conf0, conf1, conf2, conf3, conf4, conf5;
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reg [15:0] conf6, conf7, conf8, conf9, conf10, conf11;
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reg [15:0] conf12, conf13, conf14, conf15;
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//synopsys infer_multibit "conf0"
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//synopsys infer_multibit "conf1"
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//synopsys infer_multibit "conf2"
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//synopsys infer_multibit "conf3"
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//synopsys infer_multibit "conf4"
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//synopsys infer_multibit "conf5"
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//synopsys infer_multibit "conf6"
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//synopsys infer_multibit "conf7"
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//synopsys infer_multibit "conf8"
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//synopsys infer_multibit "conf9"
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//synopsys infer_multibit "conf10"
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//synopsys infer_multibit "conf11"
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//synopsys infer_multibit "conf12"
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//synopsys infer_multibit "conf13"
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//synopsys infer_multibit "conf14"
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//synopsys infer_multibit "conf15"
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wire rf_sel;
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reg [15:0] rf_dout;
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reg rf_ack;
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reg rf_we;
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////////////////////////////////////////////////////////////////////
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//
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// Register File Select Logic
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//
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assign rf_sel = i_wb_cyc_i & i_wb_stb_i & (i_wb_addr_i[aw-5:aw-8] == rf_addr);
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////////////////////////////////////////////////////////////////////
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//
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// Register File Logic
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//
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always @(posedge clk_i)
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rf_we <= #1 rf_sel & i_wb_we_i & !rf_we;
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always @(posedge clk_i)
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rf_ack <= #1 rf_sel & !rf_ack;
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// Writre Logic
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf0 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd0) ) conf0 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf1 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd1) ) conf1 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf2 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd2) ) conf2 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf3 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd3) ) conf3 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf4 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd4) ) conf4 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf5 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd5) ) conf5 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf6 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd6) ) conf6 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf7 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd7) ) conf7 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf8 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd8) ) conf8 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf9 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd9) ) conf9 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf10 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd10) ) conf10 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf11 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd11) ) conf11 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf12 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd12) ) conf12 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf13 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd13) ) conf13 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf14 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd14) ) conf14 <= #1 i_wb_data_i[15:0];
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always @(posedge clk_i or posedge rst_i)
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if(rst_i) conf15 <= #1 16'h0;
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else
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if(rf_we & (i_wb_addr_i[5:2] == 4'd15) ) conf15 <= #1 i_wb_data_i[15:0];
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// Read Logic
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always @(posedge clk_i)
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if(!rf_sel) rf_dout <= #1 16'h0;
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else
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case(i_wb_addr_i[5:2])
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4'd0: rf_dout <= #1 conf0;
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4'd1: rf_dout <= #1 conf1;
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4'd2: rf_dout <= #1 conf2;
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4'd3: rf_dout <= #1 conf3;
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4'd4: rf_dout <= #1 conf4;
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4'd5: rf_dout <= #1 conf5;
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4'd6: rf_dout <= #1 conf6;
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4'd7: rf_dout <= #1 conf7;
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4'd8: rf_dout <= #1 conf8;
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4'd9: rf_dout <= #1 conf9;
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4'd10: rf_dout <= #1 conf10;
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4'd11: rf_dout <= #1 conf11;
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4'd12: rf_dout <= #1 conf12;
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4'd13: rf_dout <= #1 conf13;
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4'd14: rf_dout <= #1 conf14;
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4'd15: rf_dout <= #1 conf15;
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endcase
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////////////////////////////////////////////////////////////////////
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//
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// Register File By-Pass Logic
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//
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assign e_wb_addr_o = i_wb_addr_i;
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assign e_wb_sel_o = i_wb_sel_i;
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assign e_wb_data_o = i_wb_data_i;
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assign e_wb_cyc_o = rf_sel ? 1'b0 : i_wb_cyc_i;
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assign e_wb_stb_o = i_wb_stb_i;
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assign e_wb_we_o = i_wb_we_i;
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assign i_wb_data_o = rf_sel ? { {aw-16{1'b0}}, rf_dout} : e_wb_data_i;
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assign i_wb_ack_o = rf_sel ? rf_ack : e_wb_ack_i;
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assign i_wb_err_o = rf_sel ? 1'b0 : e_wb_err_i;
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assign i_wb_rty_o = rf_sel ? 1'b0 : e_wb_rty_i;
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endmodule
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