Using the schematic Design Entry Method, design a logic circuit that has two 2-bit inputs X and Y, a 1-bit input CinOrBin, and a 1-bit control input SubAddn. When the control input SubAddn is ‘0’, the logic circuit behaves as a 2-bit adder ( X + Y + CinOrBin ) with CinOrBin as the carry-in when the control input SubAddn is ‘1’ and the logic circuit behaves as a 2-bit subtracter ( X – Y – CinOrBin ) with CinOrBin as the borrow-in. You must use Half-Adders and Half-Subtracters as building blocks to obtain a structured design.

hw1\addsub.asm.rpt
...\addsub.bdf
...\addsub.done
...\addsub.fit.rpt
...\addsub.fit.summary
...\addsub.flow.rpt
...\addsub.map.rpt
...\addsub.map.summary
...\addsub.pin
...\addsub.pof
...\addsub.qpf
...\addsub.qsf
...\addsub.qws
...\addsub.sim.rpt
...\addsub.sof
...\addsub.tan.rpt
...\addsub.tan.summary
...\addsub.vwf
...\db\addsub.asm.qmsg
...\..\addsub.asm_labs.ddb
...\..\addsub.cbx.xml
...\..\addsub.cmp.bpm
...\..\addsub.cmp.cdb
...\..\addsub.cmp.ecobp
...\..\addsub.cmp.hdb
...\..\addsub.cmp.kpt
...\..\addsub.cmp.logdb
...\..\addsub.cmp.rdb
...\..\addsub.cmp.tdb
...\..\addsub.cmp0.ddb
...\..\addsub.cmp_merge.kpt
...\..\addsub.db_info
...\..\addsub.eco.cdb
...\..\addsub.eds_overflow
...\..\addsub.fit.qmsg
...\..\addsub.fnsim.cdb
...\..\addsub.fnsim.hdb
...\..\addsub.fnsim.qmsg
...\..\addsub.hier_info
...\..\addsub.hif
...\..\addsub.map.bpm
...\..\addsub.map.cdb
...\..\addsub.map.ecobp
...\..\addsub.map.hdb
...\..\addsub.map.kpt
...\..\addsub.map.logdb
...\..\addsub.map.qmsg
...\..\addsub.map_bb.cdb
...\..\addsub.map_bb.hdb
...\..\addsub.map_bb.hdbx
...\..\addsub.map_bb.logdb
...\..\addsub.pre_map.cdb
...\..\addsub.pre_map.hdb
...\..\addsub.psp
...\..\addsub.rtlv.hdb
...\..\addsub.rtlv_sg.cdb
...\..\addsub.rtlv_sg_swap.cdb
...\..\addsub.sgdiff.cdb
...\..\addsub.sgdiff.hdb
...\..\addsub.sim.hdb
...\..\addsub.sim.qmsg
...\..\addsub.sim.rdb
...\..\addsub.simfam
...\..\addsub.sim_ori.vwf
...\..\addsub.sld_design_entry.sci
...\..\addsub.sld_design_entry_dsc.sci
...\..\addsub.syn_hier_info
...\..\addsub.tan.qmsg
...\..\addsub.tis_db_list.ddb
...\..\addsub.tmw_info
...\..\mux_lmc.tdf
...\..\prev_cmp_addsub.asm.qmsg
...\..\prev_cmp_addsub.fit.qmsg
...\..\prev_cmp_addsub.map.qmsg
...\..\prev_cmp_addsub.qmsg
...\..\prev_cmp_addsub.sim.qmsg
...\..\prev_cmp_addsub.tan.qmsg
...\..\wed.wsf
...\halfadder.bdf
...\halfadder.bsf
...\halfsub.bdf
...\halfsub.bsf
...\incremental_db\compiled_partitions\addsub.root_partition.cmp.atm
...\..............\...................\addsub.root_partition.cmp.dfp
...\..............\...................\addsub.root_partition.cmp.hdbx
...\..............\...................\addsub.root_partition.cmp.kpt
...\..............\...................\addsub.root_partition.cmp.logdb
...\..............\...................\addsub.root_partition.cmp.rcf
...\..............\...................\addsub.root_partition.map.atm
...\..............\...................\addsub.root_partition.map.dpi
...\..............\...................\addsub.root_partition.map.hdbx
...\..............\...................\addsub.root_partition.map.kpt
...\..............\README
...\printout\addsub functional waveform.pdf
...\........\addsub timing waveform.pdf
...\........\addsub.pdf
...\........\Fitter Resource Usage Summary.pdf
...\........\halfadder.pdf
...\........\halfsub.pdf
...\........\manual verification.xlsx

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