Rename IP using systemverilog extension

1 files changed, 0 insertions, 193 deletions

diff --git a/ip/div_signed.v b/ip/div_signed.v
deleted file mode 100644
index 7aab57c..0000000
--- a/ip/div_signed.v
+++ /dev/null
@@ -1,193 +0,0 @@
-/////////////////////////////////////////////////////////////////////
-////                                                             ////
-////  Non-restoring unsigned divider                             ////
-////                                                             ////
-////  Author: Richard Herveille                                  ////
-////          richard@asics.ws                                   ////
-////          www.asics.ws                                       ////
-////                                                             ////
-/////////////////////////////////////////////////////////////////////
-////                                                             ////
-//// Copyright (C) 2002 Richard Herveille                        ////
-////                    richard@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.                                 ////
-////                                                             ////
-/////////////////////////////////////////////////////////////////////
-
-`timescale 1 ns / 1 ns
-
-module div_signed(clock, clken, numer, denom, quotient, remain);
-
-   //
-   // parameters
-   //
-   parameter stages = 32; // controls # of pipeline stages
-   localparam width = stages;
-   parameter z_width = 2*width; // internally used width
-
-   parameter width_n = width; // width of numerator and quotient <= width
-   parameter width_d = width; // width of denominator and remainder <= width
-
-   //
-   // inputs & outputs
-   //
-   input clock;               // system clock
-   input clken;               // clock enable
-
-   input [width_n -1:0] numer; // dividend
-   input [width_d -1:0] denom; // divisor
-   output [width_n -1:0] quotient; // quotient
-   output [width_d -1:0] remain; // remainder
-   reg [width_n-1:0] 	 quotient = {(width_n){1'b0}};
-   reg [width_d-1:0] 	 remain =  {(width_d){1'b0}};
-
-   //
-   // functions
-   //
-   function [z_width:0] gen_s;
-      input [z_width:0]  si;
-      input [z_width:0]  di;
-      begin
-	 if(si[z_width])
-	   gen_s = {si[z_width-1:0], 1'b0} + di;
-	 else
-	   gen_s = {si[z_width-1:0], 1'b0} - di;
-      end
-   endfunction
-
-   function [width-1:0] gen_q;
-      input [width-1:0] qi;
-      input [z_width:0]   si;
-      begin
-	 gen_q = {qi[width-2:0], ~si[z_width]};
-      end
-   endfunction
-
-   function [width-1:0] assign_s;
-      input [z_width:0] si;
-      input [z_width:0] di;
-      reg [z_width:0] 	tmp;
-      begin
-	 if(si[z_width])
-	   tmp = si + di;
-	 else
-	   tmp = si;
-
-	 assign_s = tmp[z_width-1:z_width-width];
-      end
-   endfunction
-
-   //
-   // variables
-   //
-   reg [width-1:0] q_pipe  [width-1:0];
-   reg [z_width:0]   s_pipe  [width:0];
-   reg [z_width:0]   d_pipe  [width:0];
-
-   // added by janders; April 2015
-   // spipe1 and spipe2 keep track of whether we need to change the sign
-   // of the quotient and remainder
-   // inumer, idenom are the numerator and denominator in absolute value
-   reg [width-1:0]     spipe1;
-   reg [width-1:0] 	 spipe2;
-   reg [width-1:0] 	 inumer;
-   reg [width-1:0] 	 idenom;
-
-   integer 	     n0, n1, n2;
-
-   // This always block takes the absolute value of the numerator
-   always @(numer)
-     if (numer[width_n-1])
-       inumer = ~numer + 1'b1;
-     else
-       inumer = numer;
-
-   // Take the absolute value of the denominator
-   always @(denom)
-     if (denom[width_d-1])
-       idenom = ~denom + 1'b1;
-     else
-       idenom = denom;
-
-
-   // generate divisor (d) pipe
-   always @(idenom)
-     begin
-	d_pipe[0] 	<= {1'b0, idenom, {(z_width-width){1'b0}} };
-     end
-
-   always @(posedge clock)
-     if(clken)
-       for(n0=1; n0 <= width; n0=n0+1)
-	 d_pipe[n0] <= d_pipe[n0-1];
-
-   // generate internal remainder pipe
-   always @(inumer)
-     begin
-	s_pipe[0] <= {{(width){1'b0}}, inumer};
-     end
-
-   always @(posedge clock)
-     if(clken)
-       for(n1=1; n1 <= width; n1=n1+1)
-	 s_pipe[n1] <= gen_s(s_pipe[n1-1], d_pipe[n1-1]);
-
-   // generate quotient pipe
-   always @(posedge clock)
-     q_pipe[0] <= 0;
-
-   always @(posedge clock)
-     if(clken)
-       for(n2=1; n2 < width; n2=n2+1)
-	 q_pipe[n2] <= gen_q(q_pipe[n2-1], s_pipe[n2]);
-
-   // This is a little tricky.  The spipe1 stores whether the
-   // remainder's should be made negative.  In the LLVM srem instruction
-   // the remainder takes the sign of the numerator.
-
-   // The spipe2 stores whether the quotient is to be made negative.
-   // This follows the usual math semantics.  It should be negative
-   // if the signs of the dividend and divisor are different (XOR).
-
-   // Added by janders; April 2015
-   integer n,m;
-   always @(posedge clock)
-     if(clken)
-       begin
-	  spipe1[0] <= numer[width-1];
-
-	  for(n=1; n < width; n=n+1)
-	    spipe1[n] <= spipe1[n-1];
-
-	  spipe2[0] <= numer[width-1] ^ denom[width-1];
-	  for(m=1; m < width; m=m+1)
-	    spipe2[m] <= spipe2[m-1];
-       end
-
-   always @(posedge clock)
-     if(clken) // we may need to change the sign of the remainder
-       remain <= spipe1[width-1] ? ~assign_s(s_pipe[width], d_pipe[width]) + 1'b1 : assign_s(s_pipe[width], d_pipe[width]);
-
-   always @(posedge clock)
-     if(clken) // we may need to change the sign of the quotient
-       quotient <= spipe2[width-1] ? ~gen_q(q_pipe[width-1], s_pipe[width]) + 1'b1 : gen_q(q_pipe[width-1], s_pipe[width]);
-
-endmodule