Subversion Repositories async_sdm_noc

 History:

 History:

 05/05/2009  Initial version. <wsong83@gmail.com>

 05/05/2009  Initial version. <wsong83@gmail.com>

 20/05/2011  Change to general verilog description for opensource.

 20/05/2011  Change to general verilog description for opensource.

             The Nangate cell library is used. <wsong83@gmail.com>

             The Nangate cell library is used. <wsong83@gmail.com>

*/

*/

// General 2-input C-element

// General 2-input C-element

module c2 (a0, a1, q);

module c2 (a0, a1, q);

   wire [2:0] m;         // internal wires

   wire [2:0] m;         // internal wires

   nand U1 (m[0], a0, a1);

   nand U1 (m[0], a0, a1);

   nand U2 (m[1], a0, q);

   nand U2 (m[1], a0, q);

   nand U3 (m[2], a1, q);

   nand U3 (m[2], a1, q);

endmodule

endmodule

// the 2-input C-element on data paths, different name for easy synthesis scription

// the 2-input C-element on data paths, different name for easy synthesis scription

module dc2 (d, a, q);

module dc2 (d, a, q);

   wire [2:0] m;         // internal wires

   wire [2:0] m;         // internal wires

   nand U1 (m[0], a, d);

   nand U1 (m[0], a, d);

   nand U2 (m[1], d, q);

   nand U2 (m[1], d, q);

   nand U3 (m[2], a, q);

   nand U3 (m[2], a, q);

endmodule

endmodule

// 2-input C-element with a minus input

// 2-input C-element with a minus input

module c2n (a, b, q);

module c2n (a, b, q);

   wire [2:0] m;         // internal wires

   wire [2:0] m;         // internal wires

   nand U1 (m[0], a0, a1, b);

   nand U1 (m[0], a0, a1, b);

   nand U2 (m[1], a0, q);

   nand U2 (m[1], a0, q);

   nand U3 (m[2], a1, q);

   nand U3 (m[2], a1, q);

endmodule

endmodule

// the basic element of a tree arbiter

// the basic element of a tree arbiter

module tarb ( ngnt, ntgnt, req, treq );

module tarb ( ngnt, ntgnt, req, treq );