VHDL, 7 BCD subtraction, which can be achieved with a decimal point subtraction.

BCD_subtracter
..............\.lso
..............\BCD_subtracter.gise
..............\BCD_subtracter.xise
..............\_ngo
..............\....\netlist.lst
..............\_xmsgs
..............\......\bitgen.xmsgs
..............\......\map.xmsgs
..............\......\netgen.xmsgs
..............\......\ngdbuild.xmsgs
..............\......\par.xmsgs
..............\......\pn_parser.xmsgs
..............\......\trce.xmsgs
..............\......\xst.xmsgs
..............\fuse.log
..............\fuse.xmsgs
..............\fuseRelaunch.cmd
..............\ipcore_dir
..............\iseconfig
..............\.........\BCD_subtracter.projectmgr
..............\.........\sub_small.xreport
..............\.........\subtracter.xreport
..............\isim
..............\....\isim_usage_statistics.html
..............\....\pn_info
..............\....\precompiled.exe.sim
..............\....\...................\ieee
..............\....\...................\....\p_1242562249.c
..............\....\...................\....\p_1242562249.didat
..............\....\...................\....\p_1242562249.nt.obj
..............\....\...................\....\p_2592010699.c
..............\....\...................\....\p_2592010699.didat
..............\....\...................\....\p_2592010699.nt.obj
..............\....\...................\....\p_3499444699.c
..............\....\...................\....\p_3499444699.didat
..............\....\...................\....\p_3499444699.nt.obj
..............\....\...................\....\p_3620187407.c
..............\....\...................\....\p_3620187407.didat
..............\....\...................\....\p_3620187407.nt.obj
..............\....\subtractor_test_isim_beh.exe.sim
..............\....\................................\ISimEngine-DesignHierarchy.dbg
..............\....\................................\isimcrash.log
..............\....\................................\isimkernel.log
..............\....\................................\netId.dat
..............\....\................................\subtractor_test_isim_beh.exe
..............\....\................................\tmp_save
..............\....\................................\........\_1
..............\....\................................\work
..............\....\................................\....\a_0987807246_3212880686.c
..............\....\................................\....\a_0987807246_3212880686.didat
..............\....\................................\....\a_0987807246_3212880686.nt.obj
..............\....\................................\....\a_2025765491_3212880686.c
..............\....\................................\....\a_2025765491_3212880686.didat
..............\....\................................\....\a_2025765491_3212880686.nt.obj
..............\....\................................\....\a_3379934277_2372691052.c
..............\....\................................\....\a_3379934277_2372691052.didat
..............\....\................................\....\a_3379934277_2372691052.nt.obj
..............\....\................................\....\subtractor_test_isim_beh.exe_main.c
..............\....\................................\....\subtractor_test_isim_beh.exe_main.nt.obj
..............\....\work
..............\....\....\sub_small.vdb
..............\....\....\subtracter.vdb
..............\....\....\subtractor_test.vdb
..............\isim.cmd
..............\isim.log
..............\netgen
..............\......\synthesis
..............\......\.........\subtracter_synthesis.nlf
..............\......\.........\subtracter_synthesis.vhd
..............\pepExtractor.prj
..............\sub_small.vhd
..............\sub_small_summary.html
..............\subtracter.bgn
..............\subtracter.bit
..............\subtracter.bld
..............\subtracter.cmd_log
..............\subtracter.drc
..............\subtracter.lso
..............\subtracter.ncd
..............\subtracter.ngc
..............\subtracter.ngd
..............\subtracter.ngr
..............\subtracter.pad
..............\subtracter.par
..............\subtracter.

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