#include   "mul_GF2.h"
void mul_GF2(int C[],int A[],int am,int an ,int B[],int bm,int bn)
{
//[c]=mul_GF2(A,B)
//For examples and more details, please refer to the LDPC toolkit tutorial at
//http://arun-10.tripod.com/ldpc/ldpc.htm
int i=0,j=0,l=0,u=0;
for (i=0;i<=am-1;i++)
   for (j=0;j<=bn-1;j++)
   {u=i*bn+j;
    C[u]=0;
       for (l=0; l<=an-1; l++)
          C[u]=C[u]+A[i*an+l]*B[l*bn+j];
          C[u]=C[u]%2;
   }
 // return; 

}