module lzc_64 (
    input [63:0] a,
    output [5:0] c,
    output v
);

  logic [4:0] z0;
  logic [4:0] z1;

  logic v0;
  logic v1;

  logic s0;
  logic s1;
  logic s2;
  logic s3;
  logic s4;
  logic s5;
  logic s6;
  logic s7;
  logic s8;
  logic s9;
  logic s10;
  logic s11;
  logic s12;

  lzc_32 lzc_32_comp_0 (
      .a(a[31:0]),
      .c(z0),
      .v(v0)
  );

  lzc_32 lzc_32_comp_1 (
      .a(a[63:32]),
      .c(z1),
      .v(v1)
  );

  assign s0 = v1 | v0;
  assign s1 = (~v1) & z0[0];
  assign s2 = z1[0] | s1;
  assign s3 = (~v1) & z0[1];
  assign s4 = z1[1] | s3;
  assign s5 = (~v1) & z0[2];
  assign s6 = z1[2] | s5;
  assign s7 = (~v1) & z0[3];
  assign s8 = z1[3] | s7;
  assign s9 = (~v1) & z0[4];
  assign s10 = z1[4] | s9;

  assign v = s0;
  assign c[0] = s2;
  assign c[1] = s4;
  assign c[2] = s6;
  assign c[3] = s8;
  assign c[4] = s10;
  assign c[5] = v1;

endmodule