calyx 0.7.1

Compiler Infrastructure for Hardware Accelerator Generation
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import "primitives/core.futil";
import "primitives/memories/comb.futil";
comb component custom_lt(left: 4, right: 4) -> (out: 1) {
  cells {
    lt = std_lt(4);
  }
  wires {
    comb group g {
      lt.left = left;
      lt.right = right;
      out = lt.out;
    }
  }
}
component main(@go go: 1, @clk clk: 1, @reset reset: 1, a: 4, b: 4, c: 1) -> (@done done: 1) {
  cells {
    w1 = std_wire(4);
    w2 = std_wire(4);
    w3 = std_wire(1);
    w4 = std_wire(1);
    r = std_reg(4);
    lt = custom_lt();
  }
  wires {
    group g {
      r.write_en = 1'd1;
      r.in = w1.out;
      g[done] = r.done;
    }
    comb group cond {
      lt.left = w2.out;
      lt.right = r.out;
    }
    w1.in = a;
    w2.in = b;
    w3.in = c;
    w4.in = w3.out;
  }

  control {
    if lt.out with cond {
      if w4.out {
        g;
      }
    }
  }
}