NV_NVDLA_HLS_shiftleftsu.v

// ================================================================
// NVDLA Open Source Project
//
// Copyright(c) 2016 - 2017 NVIDIA Corporation. Licensed under the
// NVDLA Open Hardware License; Check "LICENSE" which comes with
// this distribution for more information.
// ================================================================
// File Name: NV_NVDLA_HLS_shiftleftsu.v
module NV_NVDLA_HLS_shiftleftsu (
   data_in
  ,shift_num
  ,data_out
  );
parameter IN_WIDTH = 16;
parameter OUT_WIDTH = 32;
parameter SHIFT_WIDTH = 6;
parameter SHIFT_MAX = (1<<SHIFT_WIDTH)-1;
parameter HIGH_WIDTH = SHIFT_MAX+IN_WIDTH-OUT_WIDTH;
input [IN_WIDTH-1:0] data_in;
input [SHIFT_WIDTH-1:0] shift_num;
output [OUT_WIDTH-1:0] data_out;
wire [HIGH_WIDTH-1:0] data_high;
wire [OUT_WIDTH-1:0] data_shift;
wire [OUT_WIDTH-1:0] data_max;
wire data_sign;
wire left_shift_sat;
// synoff nets
// monitor nets
// debug nets
// tie high nets
// tie low nets
// no connect nets
// not all bits used nets
// todo nets
assign data_sign = data_in[IN_WIDTH-1];
assign {data_high[((HIGH_WIDTH) - 1):0],data_shift[((OUT_WIDTH) - 1):0]} = {{SHIFT_MAX{data_sign}},data_in} << shift_num[((SHIFT_WIDTH) - 1):0];
assign left_shift_sat = {data_high[((HIGH_WIDTH) - 1):0],data_shift[OUT_WIDTH-1]} != {(HIGH_WIDTH+1){data_sign}};
assign data_max = data_sign ? {1'b1, {(OUT_WIDTH-1){1'b0}}} : ~{1'b1, {(OUT_WIDTH-1){1'b0}}};
assign data_out = left_shift_sat ? data_max : data_shift;
endmodule // NV_NVDLA_HLS_shiftleftsu