ASIC/FPGA Design and Verification Out Source Services

C++ Reference model for ECC main code.

1. This code is part of the following project: A reference model, in c++, that generates ECC for a 256 bytes.


2. This is a small block, which is used to generate random data with a specified distribution. The input for this block is a c++ STL map container. The purpose of the container is to map between a desired value to its distribution.


3. Only a simple class is included, via a short c++ header file:
   class c_pk_dist {
     public:
     c_pk_dist(map m_dist);
     unsigned char result, prob;
   };
   
   Like the header, the implementation is simple as well:
   
   1. #include "pk_rand.h"
   3. c_pk_dist::c_pk_dist(map<unsigned char, unsigned char> m_dist) {
   4.   map<unsigned char, unsigned char>::iterator it;
   5.   prob=rand()%100;
   6.   for ( it=m_dist.begin() ; it != m_dist.end(); it++ ) {
   7.     if(prob < (*it).second) {result=(*it).first; break;}
   8.   }
   9. }
   
   The usage is a shown below:
   
   //insert an error
   //number of errors probability %
   map_dist[0] =  80;  //80%
   map_dist[1] =  95;  //15%
   map_dist[2] =  98;  // 3%
   map_dist[6] = 100;  // 2%
   dist = new c_pk_dist(map_dist);