addrmap top {
    reg {
        field f_rw {sw=rw; hw=r;};
        field f_r {sw=r; hw=w;};
        field f_w {sw=w; hw=r;};

        f_rw f1[0:0] = 0;
        f_r f2[1:1];
        f_w f3[1:1];
    } overlap_fields;

    reg r_rw {
        field {sw=rw; hw=r;} f[8];
    };
    reg r_r {
        field {sw=r; hw=w;} f[8];
    };
    reg r_w {
        field {sw=w; hw=r;} f[8];
    };
    r_rw r1 @ 0x10;
    r_r r2 @ 0x14;
    r_w r3 @ 0x14;
};