Function thread_bPload

bsgsd.cpp:1963–2120

void *thread_bPload(void *vargp)	{

	char rawvalue[32];
	struct bPload *tt;
	uint64_t i_counter,j,nbStep,to;
	
	IntGroup *grp = new IntGroup(CPU_GRP_SIZE / 2 + 1);
	Point startP;
	Int dx[CPU_GRP_SIZE / 2 + 1];
	Point pts[CPU_GRP_SIZE];
	Int dy,dyn,_s,_p;
	Point pp,pn;
	
	int i,bloom_bP_index,hLength = (CPU_GRP_SIZE / 2 - 1) ,threadid;
	tt = (struct bPload *)vargp;
	Int km((uint64_t)(tt->from + 1));
	threadid = tt->threadid;

	
	i_counter = tt->from;

	nbStep = (tt->to - tt->from) / CPU_GRP_SIZE;
	
	if( ((tt->to - tt->from) % CPU_GRP_SIZE )  != 0)	{
		nbStep++;
	}
	to = tt->to;
	
	km.Add((uint64_t)(CPU_GRP_SIZE / 2));
	startP = secp->ComputePublicKey(&km);
	grp->Set(dx);
	for(uint64_t s=0;s<nbStep;s++) {
		for(i = 0; i < hLength; i++) {
			dx[i].ModSub(&Gn[i].x,&startP.x);
		}
		dx[i].ModSub(&Gn[i].x,&startP.x); // For the first point
		dx[i + 1].ModSub(&_2Gn.x,&startP.x);// For the next center point
		// Grouped ModInv
		grp->ModInv();

		// We use the fact that P + i*G and P - i*G has the same deltax, so the same inverse
		// We compute key in the positive and negative way from the center of the group
		// center point
		
		pts[CPU_GRP_SIZE / 2] = startP;	//Center point

		for(i = 0; i<hLength; i++) {
			pp = startP;
			pn = startP;

			// P = startP + i*G
			dy.ModSub(&Gn[i].y,&pp.y);

			_s.ModMulK1(&dy,&dx[i]);        // s = (p2.y-p1.y)*inverse(p2.x-p1.x);
			_p.ModSquareK1(&_s);            // _p = pow2(s)

			pp.x.ModNeg();
			pp.x.ModAdd(&_p);