// Copyright © 2019-2023
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

`include "VX_platform.vh"

`TRACING_OFF
module VX_bits_insert #(
    parameter N   = 1,
    parameter S   = 1,
    parameter POS = 0
) (
    input wire [N-1:0]      data_in,    
    input wire [`UP(S)-1:0] sel_in,    
    output wire [N+S-1:0]   data_out
); 
    if (S == 0) begin
        `UNUSED_VAR (sel_in)
        assign data_out = data_in;
    end else begin
        if (POS == 0) begin
            assign data_out = {data_in, sel_in};
        end else if (POS == N) begin
            assign data_out = {sel_in, data_in};
        end else begin
            assign data_out = {data_in[N-1:POS], sel_in, data_in[POS-1:0]};
        end
    end

endmodule
`TRACING_ON