//@Description Sketch to isolate the rightmost 0 index using only bit-vector operations. int W = 32; bit[W] isolate0 (bit[W] x) { bit[W] ret = 0; for (int i = 0; i < W; i++) if (!x[i]) { ret[i] = 1; return ret; } } generator bit[W] gen(bit[W] x, int bnd){ assert bnd > 0; if(??) return x; if(??) return ??; if(??) return ~gen(x, bnd-1); if(??){ return {| gen(x, bnd-1) (+ | & | ^) gen(x, bnd-1) |}; } } bit[W] isolate0sk (bit[W] x) implements isolate0 { return gen(x, 3); }