a 4 BIT alu implemented using vhdl as core language. Works fine on spartan 3e. tested and verified

vhdsl_4bit_alu\_xmsgs
..............\......\pn_parser.xmsgs
..............\......\xst.xmsgs
..............\alu_tb.vhd
..............\alu_tb_beh.prj
..............\alu_tb_isim_beh.exe
..............\alu_tb_isim_beh.wdb
..............\alu_tb_stx_beh.prj
..............\fuse.log
..............\fuse.xmsgs
..............\fuseRelaunch.cmd
..............\ipcore_dir
..............\iseconfig
..............\.........\vhdl_4bit_alu_module.xreport
..............\.........\vhdsl_4bit_alu.projectmgr
..............\isim.cmd
..............\isim.log
..............\isim
..............\....\alu_tb_isim_beh.exe.sim
..............\....\.......................\alu_tb_isim_beh.exe
..............\....\.......................\isimcrash.log
..............\....\.......................\ISimEngine-DesignHierarchy.dbg
..............\....\.......................\isimkernel.log
..............\....\.......................\libPortability.dll
..............\....\.......................\netId.dat
..............\....\.......................\tmp_save
..............\....\.......................\........\_1
..............\....\.......................\work
..............\....\.......................\....\a_2598182923_2372691052.c
..............\....\.......................\....\a_2598182923_2372691052.didat
..............\....\.......................\....\a_2598182923_2372691052.nt64.obj
..............\....\.......................\....\a_2888110499_3212880686.c
..............\....\.......................\....\a_2888110499_3212880686.didat
..............\....\.......................\....\a_2888110499_3212880686.nt64.obj
..............\....\.......................\....\alu_tb_isim_beh.exe_main.c
..............\....\.......................\....\alu_tb_isim_beh.exe_main.nt64.obj
..............\....\isim_usage_statistics.html
..............\....\pn_info
..............\....\precompiled.exe.sim
..............\....\...................\ieee
..............\....\...................\....\p_2592010699.c
..............\....\...................\....\p_2592010699.didat
..............\....\...................\....\p_2592010699.nt64.obj
..............\....\...................\....\p_3499444699.c
..............\....\...................\....\p_3499444699.didat
..............\....\...................\....\p_3499444699.nt64.obj
..............\....\...................\....\p_3620187407.c
..............\....\...................\....\p_3620187407.didat
..............\....\...................\....\p_3620187407.nt64.obj
..............\....\simul_isim_beh.exe.sim
..............\....\......................\isimcrash.log
..............\....\......................\ISimEngine-DesignHierarchy.dbg
..............\....\......................\isimkernel.log
..............\....\......................\libPortability.dll
..............\....\......................\netId.dat
..............\....\......................\simul_isim_beh.exe
..............\....\......................\tmp_save
..............\....\......................\........\_1
..............\....\......................\work
..............\....\......................\....\a_1728009557_2372691052.c
..............\....\......................\....\a_1728009557_2372691052.didat
..............\....\......................\....\a_1728009557_2372691052.nt64.obj
..............\....\......................\....\a_2888110499_3212880686.c
..............\....\......................\....\a_2888110499_3212880686.didat
..............\....\......................\....\a_2888110499_3212880686.nt64.obj
..............\....\......................\....\simul_isim_beh.exe_main.c
..............\....\......................\....\simul_isim_beh.exe_main.nt64.obj
..............\....\simulation_isim_beh.exe.sim
..............\....\...........................\isimcrash.log
..............\....\...........................\ISimEngine-DesignHierarchy.dbg
..............\....\...........................\isimkernel.log
..............\....\...........................\libPortability.dll
..............\....\...........................\netId.dat
..............\....\.............

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