625     ULong *x, *xa, *xae, *xb, *xbe, *xc, *xc0;  in mult()  local
656     xb = b->x;  in mult()
657     xbe = xb + wb;  in mult()
659     for(; xb < xbe; xc0++) {  in mult()
660         if ((y = *xb++)) {  in mult()
845     ULong *xa, *xa0, *xb, *xb0;  in cmp()  local
861     xb = xb0 + j;  in cmp()
863         if (*--xa != *--xb)  in cmp()
864             return *xa < *xb ? -1 : 1;  in cmp()
880     ULong *xa, *xae, *xb, *xbe, *xc;  in diff()  local
908     xb = b->x;  in diff()
909     xbe = xb + wb;  in diff()
913         y = (ULLong)*xa++ - *xb++ - borrow;  in diff()
917     while(xb < xbe);  in diff()