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// © IBM Corp. 2020
// Licensed under the Apache License, Version 2.0 (the "License"), as modified by
// the terms below; you may not use the files in this repository except in
// compliance with the License as modified.
// You may obtain a copy of the License at
// Modified Terms:
// 1) For the purpose of the patent license granted to you in Section 3 of the
// License, the "Work" hereby includes implementations of the work of authorship
// in physical form.
// 2) Notwithstanding any terms to the contrary in the License, any licenses
// necessary for implementation of the Work that are available from OpenPOWER
// via the Power ISA End User License Agreement (EULA) are explicitly excluded
// hereunder, and may be obtained from OpenPOWER under the terms and conditions
// of the EULA.
// Unless required by applicable law or agreed to in writing, the reference design
// 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.
// Additional rights, including the ability to physically implement a softcore that
// is compliant with the required sections of the Power ISA Specification, are
// available at no cost under the terms of the OpenPOWER Power ISA EULA, which can be
// obtained (along with the Power ISA) here:
`timescale 1 ns / 1 ns
`include "tri_a2o.vh"
module fu_loc8inc_lsb(
input [0:4] x; //48 to 52
output co_b;
output [0:4] s0;
output [0:4] s1;
wire [0:4] x_b;
wire [0:4] t2_b;
wire [0:4] t4;
// FOLDED layout
// i0_xb i2_xb i4_xb skip skip skip skip
// i1_xb i3_xb skip skip skip skip skip
// i0_t2 i2_t2 i4_t2 skip skip skip skip
// skip i1_t2 i3_t2 skip skip skip skip
// i0_t2 i2_t2 i4_t2 skip skip skip skip
// i0_t8 i1_t2 i3_t2 skip skip skip skip
// i0_s0 i2_s0 i4_s0 skip skip skip skip
// i1_s0 i3_s0 skip skip skip skip skip
// i0_s1 i2_s1 i4_s1 skip skip skip skip
// i1_s1 i3_s1 skip skip skip skip skip
// buffer off non critical path
assign x_b[0] = (~x[0]);
assign x_b[1] = (~x[1]);
assign x_b[2] = (~x[2]);
assign x_b[3] = (~x[3]);
assign x_b[4] = (~x[4]);
// local carry chain
assign t2_b[0] = (~(x[0]));
assign t2_b[1] = (~(x[1] & x[2]));
assign t2_b[2] = (~(x[2] & x[3]));
assign t2_b[3] = (~(x[3] & x[4]));
assign t2_b[4] = (~(x[4]));
assign t4[0] = (~(t2_b[0]));
assign t4[1] = (~(t2_b[1] | t2_b[3]));
assign t4[2] = (~(t2_b[2] | t2_b[4]));
assign t4[3] = (~(t2_b[3]));
assign t4[4] = (~(t2_b[4]));
assign co_b = (~(t4[0] & t4[1]));
// sum generation
assign s0[0] = (~(x_b[0]));
assign s0[1] = (~(x_b[1]));
assign s0[2] = (~(x_b[2]));
assign s0[3] = (~(x_b[3]));
assign s0[4] = (~(x_b[4]));
assign s1[0] = (~(x_b[0] ^ t4[1]));
assign s1[1] = (~(x_b[1] ^ t4[2]));
assign s1[2] = (~(x_b[2] ^ t4[3]));
assign s1[3] = (~(x_b[3] ^ t4[4]));
assign s1[4] = (~(t4[4]));