path: root/rtl/modexpng_sdp_36k_x18_wrapper_generic.v

//======================================================================
//
// Copyright: 2019, The Commons Conservancy Cryptech Project
// SPDX-License-Identifier: BSD-3-Clause
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// - Redistributions in binary form must reproduce the above copyright
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//======================================================================

module modexpng_sdp_36k_x18_wrapper_generic
(
    clk,
    
    ena, wea,
    addra, dina,
    
    enb, regceb,
    addrb, doutb
);


    //
    // Headers
    //
    `include "modexpng_parameters.vh"


    //
    // Ports
    //
    input                                 clk;
    
    input                                 ena;
    input                                 wea;
    input  [BANK_ADDR_W + OP_ADDR_W -1:0] addra;
    input  [             WORD_EXT_W -1:0] dina;
    
    input                                 enb;
    input                                 regceb;
    input  [BANK_ADDR_W + OP_ADDR_W -1:0] addrb;
    output [             WORD_EXT_W -1:0] doutb;

    //
    // Memory
    //
    reg [WORD_EXT_W -1:0] mem[0:2**(BANK_ADDR_W+OP_ADDR_W)-1];
   
    //
    // Write Port
    //
    always @(posedge clk)
        //
        if (ena && wea)
            mem[addra] <= dina;
            
    //
    // Read Port
    //
    reg [WORD_EXT_W -1:0] doutb_reg1;
    reg [WORD_EXT_W -1:0] doutb_reg2;
    
    assign doutb = doutb_reg2;
    
    always @(posedge clk)
        //
        if (enb)
            doutb_reg1 <= mem[addrb];
            
    always @(posedge clk)
        //
        if (regceb)
            doutb_reg2 <= doutb_reg1;
    


endmodule