220model.v

FIFO（先进先出队列）通常用于数据的缓存和用于容纳异步信号的频率或相位的差异。本FIFO的实现是利用 双口RAM 和读写地址产生模块来实现的.FIFO的接口信号包括异步的写时钟（wr_clk）和读

//-------------------------------------------------------------------------
// This Verilog file was developed by Altera Corporation.  It may be
// freely copied and/or distributed at no cost.  Any persons using this
// file for any purpose do so at their own risk, and are responsible for
// the results of such use.  Altera Corporation does not guarantee that
// this file is complete, correct, or fit for any particular purpose.
// NO WARRANTY OF ANY KIND IS EXPRESSED OR IMPLIED.  This notice must
// accompany any copy of this file.
//------------------------------------------------------------------------
//
// Quartus II 4.0 Build 214 1/28/2004
//
//------------------------------------------------------------------------
// LPM Synthesizable Models (Support string type generic)
// These models are based on LPM version 220 (EIA-IS103 October 1998).
//------------------------------------------------------------------------
//
//-----------------------------------------------------------------------------
// Assumptions:
//
// 1. The default value for LPM_SVALUE, LPM_AVALUE, LPM_PVALUE, and
//    LPM_STRENGTH is string UNUSED.
//
//-----------------------------------------------------------------------------
// Verilog Language Issues:
//
// Two dimensional ports are not supported. Modules with two dimensional
// ports are implemented as one dimensional signal of (LPM_SIZE * LPM_WIDTH)
// bits wide.
//
//-----------------------------------------------------------------------------

//START_MODULE_NAME------------------------------------------------------------
//
// Module Name     :  LPM_DEVICE_FAMILIES
//
// Description     :  Common Altera device families comparison
//
// Limitation      :  
//
// Results expected:
//
//END_MODULE_NAME--------------------------------------------------------------

// BEGINNING OF MODULE
`timescale 1 ps / 1 ps

// MODULE DECLARATION
module LPM_DEVICE_FAMILIES;

// FUNCTON DECLARATION
function IS_VALID_FAMILY;
    input device;
    reg[8*20:1] device;
    reg is_valid;
begin
    if (IS_FAMILY_APEX20K(device) || IS_FAMILY_APEX20KE(device) ||
        IS_FAMILY_APEXII(device) || IS_FAMILY_ACEX2K(device) || 
        IS_FAMILY_STRATIXGX(device) || IS_FAMILY_STRATIX(device) ||
        IS_FAMILY_MERCURY(device) || IS_FAMILY_MAX(device) || 
        IS_FAMILY_FLEX6000(device) || IS_FAMILY_FLEX8000(device) ||
        IS_FAMILY_FLEX10K(device) || IS_FAMILY_FLEX10KE(device) ||
        IS_FAMILY_STRATIXII(device) || IS_FAMILY_STRATIXHC(device) ||
        IS_FAMILY_MAXII(device))
        is_valid = 1;
    else
        is_valid = 0;

    IS_VALID_FAMILY = is_valid;
end
endfunction // IS_VALID_FAMILY

function IS_FAMILY_APEX20K;
    input device;
    reg[8*20:1] device;
    reg is_20k;    
begin
    if (device == "APEX20K")
        is_20k = 1; 
    else 
        is_20k = 0;
    
    IS_FAMILY_APEX20K = is_20k;
end
endfunction // IS_FAMILY_APEX20K

function IS_FAMILY_APEX20KE;
    input device;
    reg[8*20:1] device;
    reg is_20ke;    
begin
    if ((device == "APEX20KE") || (device == "APEX20KC") || 
    (device == "EXCALIBUR_ARM") || (device == "EXCALIBUR_MIPS"))
        is_20ke = 1; 
    else 
        is_20ke = 0;
    
    IS_FAMILY_APEX20KE = is_20ke;
end
endfunction // IS_FAMILY_APEX20KE

function IS_FAMILY_APEXII;
    input device;
    reg[8*20:1] device;
    reg is_apexii;    
begin
    if ((device == "APEX II") || (device == "APEXII"))
        is_apexii = 1; 
    else 
        is_apexii = 0;
    
    IS_FAMILY_APEXII = is_apexii;
end
endfunction // IS_FAMILY_APEXII

function IS_FAMILY_ACEX2K;
    input device;
    reg[8*20:1] device;
    reg is_acex2k;    
begin
    if ((device == "CYCLONE") || (device == "Cyclone"))
        is_acex2k = 1; 
    else 
        is_acex2k = 0;
    
    IS_FAMILY_ACEX2K = is_acex2k;
end
endfunction // IS_FAMILY_ACEX2K

function IS_FAMILY_STRATIXGX;
    input device;
    reg[8*20:1] device;
    reg is_stratixgx;    
begin
    if ((device == "STRATIX-GX") || (device == "STRATIX GX") ||
    (device == "Stratix GX"))
        is_stratixgx = 1; 
    else 
        is_stratixgx = 0;
   
    IS_FAMILY_STRATIXGX = is_stratixgx;
end
endfunction // IS_FAMILY_STRATIXGX

function IS_FAMILY_STRATIX;
    input device;
    reg[8*20:1] device;
    reg is_stratix;    
begin
    if ((device == "STRATIX") || (device == "Stratix"))
        is_stratix = 1; 
    else 
        is_stratix = 0;
    
    IS_FAMILY_STRATIX = is_stratix;
end
endfunction // IS_FAMILY_STRATIX

function IS_FAMILY_MERCURY;
    input device;
    reg[8*20:1] device;
    reg is_mercury;
begin
    if ((device == "MERCURY") || (device == "Mercury"))
        is_mercury = 1; 
    else 
        is_mercury = 0;
    
    IS_FAMILY_MERCURY = is_mercury;
end
endfunction // IS_FAMILY_MERCURY

function IS_FAMILY_MAX;
    input device;
    reg[8*20:1] device;
    reg is_max;
begin
    if ((device == "MAX5000") || (device == "MAX3000A") || (device == "MAX7000") ||
        (device == "MAX7000A") || (device == "MAX7000AE") || (device == "MAX7000E") ||
        (device == "MAX7000S") || (device == "MAX7000B") || (device == "MAX9000"))
        is_max = 1; 
    else 
        is_max = 0;
    
    IS_FAMILY_MAX = is_max;
end
endfunction // IS_FAMILY_MAX

function IS_FAMILY_FLEX6000;
    input device;
    reg[8*20:1] device;
    reg is_flex6k;    
begin
    if (device == "FLEX6000")
        is_flex6k = 1; 
    else 
        is_flex6k = 0;
    
    IS_FAMILY_FLEX6000 = is_flex6k;
end
endfunction // IS_FAMILY_FLEX6000

function IS_FAMILY_FLEX8000;
    input device;
    reg[8*20:1] device;
    reg is_flex8k;    
begin
    if (device == "FLEX8000")
        is_flex8k = 1; 
    else 
        is_flex8k = 0;
    
    IS_FAMILY_FLEX8000 = is_flex8k;
end
endfunction // IS_FAMILY_FLEX8000

function IS_FAMILY_FLEX10K;
    input device;
    reg[8*20:1] device;
    reg is_flex10k;
begin
    if ((device == "FLEX10K") || (device == "FLEX10KA"))
        is_flex10k = 1; 
    else 
        is_flex10k = 0;
    
    IS_FAMILY_FLEX10K = is_flex10k;
end
endfunction // IS_FAMILY_FLEX10K

function IS_FAMILY_FLEX10KE;
    input device;
    reg[8*20:1] device;
    reg is_flex10ke;
begin
    if ((device == "FLEX10KE") || (device == "FLEX 10KE") ||
        (device == "ACEX1K") || (device == "ACEX 1K"))
        is_flex10ke = 1; 
    else 
        is_flex10ke = 0;
    
    IS_FAMILY_FLEX10KE = is_flex10ke;
end
endfunction // IS_FAMILY_FLEX10KE

function IS_FAMILY_STRATIXII;
    input device;
    reg[8*20:1] device;
    reg is_stratixii;
begin
    if (device == "Stratix II")
        is_stratixii = 1; 
    else 
        is_stratixii = 0;
    
    IS_FAMILY_STRATIXII = is_stratixii;
end
endfunction // IS_FAMILY_STRATIXII

function IS_FAMILY_STRATIXHC;
    input device;
    reg[8*20:1] device;
    reg is_stratixhc;
begin
    if ((device == "STRATIXHC")  || (device == "StratixHC") ||
        (device == "STRATIX HC") || (device == "Stratix HC") ||
        (device == "HardCopy Stratix") || (device == "HARDCOPY STRATIX"))
        is_stratixhc = 1;
    else
        is_stratixhc = 0;

    IS_FAMILY_STRATIXHC = is_stratixhc;
end
endfunction // IS_FAMILY_STRATIXHC

function IS_FAMILY_MAXII;
    input device;
    reg[8*20:1] device;
    reg is_maxii;
begin
    if ((device == "MAX II") || (device == "max ii") ||
        (device == "MAXII") || (device == "maxii"))
        is_maxii = 1;
    else
        is_maxii = 0;

    IS_FAMILY_MAXII  = is_maxii;
end
endfunction //IS_FAMILY_MAXII

endmodule // LPM_DEVICE_FAMILIES


//START_MODULE_NAME------------------------------------------------------------
//
// Module Name     :  LPM_HINT_EVALUATION
//
// Description     :  Common function to grep the value of altera specific parameters
//                    within the lpm_hint parameter.
//
// Limitation      :  No error checking to check whether the content of the lpm_hint
//                    is valid or not.
//
// Results expected:  If the target parameter found, return the value of the parameter.
//                    Otherwise, return empty string.
//
//END_MODULE_NAME--------------------------------------------------------------

// BEGINNING OF MODULE
`timescale 1 ps / 1 ps

// MODULE DECLARATION
module LPM_HINT_EVALUATION;

// FUNCTON DECLARATION

// This function will search through the string (given string) to look for a match for the
// a given parameter(compare_param_name). It will return the value for the given parameter.
function [8*200:1] GET_PARAMETER_VALUE;
    input [8*200:1] given_string;  // string to be searched
    input [8*50:1] compare_param_name; // parameter name to be looking for in the given_string.
    integer param_value_char_count; // to indicate current character count in the param_value
    integer param_name_char_count;  // to indicate current character count in the param_name
    integer white_space_count;

    reg extract_param_value; // if 1 mean extracting parameters value from given string
    reg extract_param_name;  // if 1 mean extracting parameters name from given string
    reg param_found; // to indicate whether compare_param_name have been found in the given_string
    reg include_white_space; // if 1, include white space in the parameter value

    reg [8*200:1] reg_string; // to store the value of the given string
    reg [8*50:1] param_name;  // to store parameter name
    reg [8*20:1] param_value; // to store parameter value
    reg [8:1] tmp; // to get the value of the current byte
begin
    reg_string = given_string;
    param_value_char_count = 0;
    param_name_char_count =0;
    extract_param_value = 1;
    extract_param_name = 0;
    param_found = 0;
    include_white_space = 0;
    white_space_count = 0;

    tmp = reg_string[8:1];

    // checking every bytes of the reg_string from right to left.
    while ((tmp != 0 ) && (param_found != 1))
    begin
        tmp = reg_string[8:1];

        //if tmp != ' ' or should include white space (trailing white space are ignored)
        if((tmp != 32) || (include_white_space == 1))
        begin
            if(tmp == 32)
            begin
                white_space_count = 1;
            end
            else if(tmp == 61)  // if tmp = '='
            begin
                extract_param_value = 0;
                extract_param_name =  1;  // subsequent bytes should be part of param_name
                include_white_space = 0;  // ignore the white space (if any) between param_name and '='
                white_space_count = 0;
                param_value = param_value >> (8 * (20 - param_value_char_count));
                param_value_char_count = 0;
            end
            else if (tmp == 44) // if tmp = ','
            begin
                extract_param_value = 1; // subsequent bytes should be part of param_value
                extract_param_name =  0;
                param_name = param_name >> (8 * (50 - param_name_char_count));
                param_name_char_count = 0;
                if(param_name == compare_param_name)
                    param_found = 1;  // the compare_param_name have been found in the reg_string
            end
            else
            begin
                if(extract_param_value == 1)
                begin
                    param_value_char_count = param_value_char_count + white_space_count + 1;
                    include_white_space = 1;
                    if(white_space_count > 0)
                    begin
                        param_value = {8'b100000, param_value[20*8:9]};
                        white_space_count = 0;
                    end
                    param_value = {tmp, param_value[20*8:9]};
                end
                else if(extract_param_name == 1)
                begin
                    param_name = {tmp, param_name[50*8:9]};
                    param_name_char_count = param_name_char_count + 1;
                end
            end
        end
        reg_string = reg_string >> 8;  // shift 1 byte to the right
    end

    // for the case whether param_name is the left most part of the reg_string
    if(extract_param_name == 1)
    begin
        param_name = param_name >> (8 * (50 - param_name_char_count));

        if(param_name == compare_param_name)
            param_found = 1;
    end