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// Copyright (c) 1995/2016 Xilinx, Inc.
//
// 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.
///////////////////////////////////////////////////////////////////////////////
// ____ ____
// / /\/ /
// /___/ \ / Vendor : Xilinx
// \ \ \/ Version : 2017.1
// \ \ Description : Xilinx Unified Simulation Library Component
// / / 6-Bit Look-Up Table
// /___/ /\ Filename : LUT6.v
// \ \ / \
// \___\/\___\
//
///////////////////////////////////////////////////////////////////////////////
// Revision:
// 03/23/04 - Initial version.
// 02/04/05 - Replace primitive with function; Remove buf.
// 01/07/06 - 222733 - Add LOC Parameter
// 06/04/07 - Add wire declaration to internal signal.
// 12/13/11 - 524859 - Added `celldefine and `endcelldefine
// 09/12/16 - ANSI ports, speed improvements
// End Revision:
///////////////////////////////////////////////////////////////////////////////
`timescale 1 ps/1 ps
`celldefine
module LUT6 #(
`ifdef XIL_TIMING
parameter LOC = "UNPLACED",
`endif
parameter [63:0] INIT = 64'h0000000000000000
)(
output O,
input I0,
input I1,
input I2,
input I3,
input I4,
input I5
);
// define constants
localparam MODULE_NAME = "LUT6";
reg trig_attr = 1'b0;
// include dynamic registers - XILINX test only
`ifdef XIL_DR
`include "LUT6_dr.v"
`else
reg [63:0] INIT_REG = INIT;
`endif
// begin behavioral model
reg O_out;
assign O = O_out;
function lut_mux8_f;
input [7:0] d;
input [2:0] s;
begin
if (((s[2]^s[1]^s[0]) === 1'b1) || ((s[2]^s[1]^s[0]) === 1'b0))
lut_mux8_f = d[s];
else if ( ~(|d) || &d)
lut_mux8_f = d[0];
else if ((((s[1]^s[0]) === 1'b1) || ((s[1]^s[0]) === 1'b0)) &&
(d[{1'b0,s[1:0]}] === d[{1'b1,s[1:0]}]))
lut_mux8_f = d[{1'b0,s[1:0]}];
else if ((((s[2]^s[0]) === 1'b1) || ((s[2]^s[0]) === 1'b0)) &&
(d[{s[2],1'b0,s[0]}] === d[{s[2],1'b1,s[0]}]))
lut_mux8_f = d[{s[2],1'b0,s[0]}];
else if ((((s[2]^s[1]) === 1'b1) || ((s[2]^s[1]) === 1'b0)) &&
(d[{s[2],s[1],1'b0}] === d[{s[2],s[1],1'b1}]))
lut_mux8_f = d[{s[2:1],1'b0}];
else if (((s[0] === 1'b1) || (s[0] === 1'b0)) &&
(d[{1'b0,1'b0,s[0]}] === d[{1'b0,1'b1,s[0]}]) &&
(d[{1'b0,1'b0,s[0]}] === d[{1'b1,1'b0,s[0]}]) &&
(d[{1'b0,1'b0,s[0]}] === d[{1'b1,1'b1,s[0]}]))
lut_mux8_f = d[{1'b0,1'b0,s[0]}];
else if (((s[1] === 1'b1) || (s[1] === 1'b0)) &&
(d[{1'b0,s[1],1'b0}] === d[{1'b0,s[1],1'b1}]) &&
(d[{1'b0,s[1],1'b0}] === d[{1'b1,s[1],1'b0}]) &&
(d[{1'b0,s[1],1'b0}] === d[{1'b1,s[1],1'b1}]))
lut_mux8_f = d[{1'b0,s[1],1'b0}];
else if (((s[2] === 1'b1) || (s[2] === 1'b0)) &&
(d[{s[2],1'b0,1'b0}] === d[{s[2],1'b0,1'b1}]) &&
(d[{s[2],1'b0,1'b0}] === d[{s[2],1'b1,1'b0}]) &&
(d[{s[2],1'b0,1'b0}] === d[{s[2],1'b1,1'b1}]))
lut_mux8_f = d[{s[2],1'b0,1'b0}];
else
lut_mux8_f = 1'bx;
end
endfunction
always @(I0 or I1 or I2 or I3 or I4 or I5) begin
if ( (I0 ^ I1 ^ I2 ^ I3 ^ I4 ^ I5) === 1'b0 || (I0 ^ I1 ^ I2 ^ I3 ^ I4 ^ I5) === 1'b1)
O_out = INIT_REG[{I5, I4, I3, I2, I1, I0}];
else if ( ~(|INIT_REG) || &INIT_REG )
O_out = INIT_REG[0];
else
O_out = lut_mux8_f ({lut_mux8_f (INIT_REG[63:56], {I2, I1, I0}),
lut_mux8_f (INIT_REG[55:48], {I2, I1, I0}),
lut_mux8_f (INIT_REG[47:40], {I2, I1, I0}),
lut_mux8_f (INIT_REG[39:32], {I2, I1, I0}),
lut_mux8_f (INIT_REG[31:24], {I2, I1, I0}),
lut_mux8_f (INIT_REG[23:16], {I2, I1, I0}),
lut_mux8_f ( INIT_REG[15:8], {I2, I1, I0}),
lut_mux8_f ( INIT_REG[7:0], {I2, I1, I0})}, {I5, I4, I3});
end
// end behavioral model
`ifdef XIL_TIMING
specify
(I0 => O) = (0:0:0, 0:0:0);
(I1 => O) = (0:0:0, 0:0:0);
(I2 => O) = (0:0:0, 0:0:0);
(I3 => O) = (0:0:0, 0:0:0);
(I4 => O) = (0:0:0, 0:0:0);
(I5 => O) = (0:0:0, 0:0:0);
specparam PATHPULSE$ = 0;
endspecify
`endif
endmodule
`endcelldefine |