Computational routine
eng

##
matmul_i8s

### File content

    # include "scicos_block4.h"
    # include "../machine.h"
    # include <math.h>

    void matmul_i8s(scicos_block *block,int flag)
    {
     if ((flag==1)|(flag==6)) {
      char *u1,*u2,*y;
      double k,C,D;
      int mu1,nu1,nu2,i,j,l,ji,jl,il;
      int *ipar;

      mu1=GetInPortRows(block,1);
      nu1=GetInPortCols(block,1);
      nu2=GetInPortCols(block,2);
      u1=Getint8InPortPtrs(block,1);
      u2=Getint8InPortPtrs(block,2);
      y=Getint8OutPortPtrs(block,1);
      ipar=GetIparPtrs(block);

         k=pow(2,8);
           for (l=0;l<nu2;l++)
    	    {for(j=0;j<mu1;j++)
    	        {D=0;
    	        for(i=0;i<nu1;i++)
    		   {ji=j+i*mu1;
    		    jl=j+l*mu1;
    		    il=i+l*nu1;
    		    C=(double)(u1[ji])*(double)(u2[il]);
    		    D=D + C;}
    		    if ((D)>((k/2)-1))
    		        {y[jl]=(char)((k/2)-1);}
    		    else if ((D)<-((k/2)))
    			{y[jl]=-(char)((k/2));}
    		    else {y[jl]=(char)(D);}
    		    }
    		 }
    	     }
    }