文件名称:barrel_shifter
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- 上传时间：2013-04-28
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A barrel shifter is a digital circuit that can shift a data word by a specified number of bits in one clock cycle. It can be implemented as a sequence of multiplexers (mux.), and in such an implementation the output of one mux is connected to the input of the next mux in a way that depends on the shift distance.
For example, take a four-bit barrel shifter, with inputs A, B, C and D. The shifter can cycle the order of the bits ABCD as DABC, CDAB, or BCDA in this case, no bits are lost. That is, it can shift all of the outputs up to three positions to the right (and thus make any cyclic combination of A, B, C and D). The barrel shifter has a variety of applications, including being a useful component in microprocessors (alongside the ALU)-A barrel shifter is a digital circuit that can shift a data word by a specified number of bits in one clock cycle. It can be implemented as a sequence of multiplexers (mux.), and in such an implementation the output of one mux is connected to the input of the next mux in a way that depends on the shift distance.
For example, take a four-bit barrel shifter, with inputs A, B, C and D. The shifter can cycle the order of the bits ABCD as DABC, CDAB, or BCDA in this case, no bits are lost. That is, it can shift all of the outputs up to three positions to the right (and thus make any cyclic combination of A, B, C and D). The barrel shifter has a variety of applications, including being a useful component in microprocessors (alongside the ALU)
For example, take a four-bit barrel shifter, with inputs A, B, C and D. The shifter can cycle the order of the bits ABCD as DABC, CDAB, or BCDA in this case, no bits are lost. That is, it can shift all of the outputs up to three positions to the right (and thus make any cyclic combination of A, B, C and D). The barrel shifter has a variety of applications, including being a useful component in microprocessors (alongside the ALU)-A barrel shifter is a digital circuit that can shift a data word by a specified number of bits in one clock cycle. It can be implemented as a sequence of multiplexers (mux.), and in such an implementation the output of one mux is connected to the input of the next mux in a way that depends on the shift distance.
For example, take a four-bit barrel shifter, with inputs A, B, C and D. The shifter can cycle the order of the bits ABCD as DABC, CDAB, or BCDA in this case, no bits are lost. That is, it can shift all of the outputs up to three positions to the right (and thus make any cyclic combination of A, B, C and D). The barrel shifter has a variety of applications, including being a useful component in microprocessors (alongside the ALU)
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下载文件列表
barrel_shifter/.lso
barrel_shifter/barrel_shifter.bld
barrel_shifter/barrel_shifter.cmd_log
barrel_shifter/barrel_shifter.gise
barrel_shifter/barrel_shifter.lso
barrel_shifter/barrel_shifter.ncd
barrel_shifter/barrel_shifter.ngc
barrel_shifter/barrel_shifter.ngd
barrel_shifter/barrel_shifter.ngr
barrel_shifter/barrel_shifter.pad
barrel_shifter/barrel_shifter.par
barrel_shifter/barrel_shifter.pcf
barrel_shifter/barrel_shifter.prj
barrel_shifter/barrel_shifter.ptwx
barrel_shifter/barrel_shifter.stx
barrel_shifter/barrel_shifter.syr
barrel_shifter/barrel_shifter.twr
barrel_shifter/barrel_shifter.twx
barrel_shifter/barrel_shifter.unroutes
barrel_shifter/barrel_shifter.vhd
barrel_shifter/barrel_shifter.xise
barrel_shifter/barrel_shifter.xpi
barrel_shifter/barrel_shifter.xst
barrel_shifter/barrel_shifter_envsettings.html
barrel_shifter/barrel_shifter_fpga_editor.log
barrel_shifter/barrel_shifter_fpga_editor.out
barrel_shifter/barrel_shifter_guide.ncd
barrel_shifter/barrel_shifter_map.map
barrel_shifter/barrel_shifter_map.mrp
barrel_shifter/barrel_shifter_map.ncd
barrel_shifter/barrel_shifter_map.ngm
barrel_shifter/barrel_shifter_map.xrpt
barrel_shifter/barrel_shifter_ngdbuild.xrpt
barrel_shifter/barrel_shifter_pad.csv
barrel_shifter/barrel_shifter_pad.txt
barrel_shifter/barrel_shifter_par.xrpt
barrel_shifter/barrel_shifter_summary.html
barrel_shifter/barrel_shifter_summary.xml
barrel_shifter/barrel_shifter_usage.xml
barrel_shifter/barrel_shifter_vhdl.prj
barrel_shifter/barrel_shifter_xst.xrpt
barrel_shifter/iseconfig/barrel_shifter.projectmgr
barrel_shifter/iseconfig/barrel_shifter.xreport
barrel_shifter/webtalk_pn.xml
barrel_shifter/xlnx_auto_0_xdb/cst.xbcd
barrel_shifter/xst/work/hdllib.ref
barrel_shifter/xst/work/hdpdeps.ref
barrel_shifter/xst/work/sub00/vhpl00.vho
barrel_shifter/xst/work/sub00/vhpl01.vho
barrel_shifter/xst/work/sub00/vhpl02.vho
barrel_shifter/_ngo/netlist.lst
barrel_shifter/_xmsgs/map.xmsgs
barrel_shifter/_xmsgs/ngdbuild.xmsgs
barrel_shifter/_xmsgs/par.xmsgs
barrel_shifter/_xmsgs/pn_parser.xmsgs
barrel_shifter/_xmsgs/trce.xmsgs
barrel_shifter/_xmsgs/xst.xmsgs
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx/notopt
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx/opt
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx
barrel_shifter/xst/dump.xst/barrel_shifter.prj
barrel_shifter/xst/work/sub00
barrel_shifter/xst/dump.xst
barrel_shifter/xst/projnav.tmp
barrel_shifter/xst/work
barrel_shifter/ipcore_dir
barrel_shifter/iseconfig
barrel_shifter/xlnx_auto_0_xdb
barrel_shifter/xst
barrel_shifter/_ngo
barrel_shifter/_xmsgs
barrel_shifter
barrel_shifter/barrel_shifter.bld
barrel_shifter/barrel_shifter.cmd_log
barrel_shifter/barrel_shifter.gise
barrel_shifter/barrel_shifter.lso
barrel_shifter/barrel_shifter.ncd
barrel_shifter/barrel_shifter.ngc
barrel_shifter/barrel_shifter.ngd
barrel_shifter/barrel_shifter.ngr
barrel_shifter/barrel_shifter.pad
barrel_shifter/barrel_shifter.par
barrel_shifter/barrel_shifter.pcf
barrel_shifter/barrel_shifter.prj
barrel_shifter/barrel_shifter.ptwx
barrel_shifter/barrel_shifter.stx
barrel_shifter/barrel_shifter.syr
barrel_shifter/barrel_shifter.twr
barrel_shifter/barrel_shifter.twx
barrel_shifter/barrel_shifter.unroutes
barrel_shifter/barrel_shifter.vhd
barrel_shifter/barrel_shifter.xise
barrel_shifter/barrel_shifter.xpi
barrel_shifter/barrel_shifter.xst
barrel_shifter/barrel_shifter_envsettings.html
barrel_shifter/barrel_shifter_fpga_editor.log
barrel_shifter/barrel_shifter_fpga_editor.out
barrel_shifter/barrel_shifter_guide.ncd
barrel_shifter/barrel_shifter_map.map
barrel_shifter/barrel_shifter_map.mrp
barrel_shifter/barrel_shifter_map.ncd
barrel_shifter/barrel_shifter_map.ngm
barrel_shifter/barrel_shifter_map.xrpt
barrel_shifter/barrel_shifter_ngdbuild.xrpt
barrel_shifter/barrel_shifter_pad.csv
barrel_shifter/barrel_shifter_pad.txt
barrel_shifter/barrel_shifter_par.xrpt
barrel_shifter/barrel_shifter_summary.html
barrel_shifter/barrel_shifter_summary.xml
barrel_shifter/barrel_shifter_usage.xml
barrel_shifter/barrel_shifter_vhdl.prj
barrel_shifter/barrel_shifter_xst.xrpt
barrel_shifter/iseconfig/barrel_shifter.projectmgr
barrel_shifter/iseconfig/barrel_shifter.xreport
barrel_shifter/webtalk_pn.xml
barrel_shifter/xlnx_auto_0_xdb/cst.xbcd
barrel_shifter/xst/work/hdllib.ref
barrel_shifter/xst/work/hdpdeps.ref
barrel_shifter/xst/work/sub00/vhpl00.vho
barrel_shifter/xst/work/sub00/vhpl01.vho
barrel_shifter/xst/work/sub00/vhpl02.vho
barrel_shifter/_ngo/netlist.lst
barrel_shifter/_xmsgs/map.xmsgs
barrel_shifter/_xmsgs/ngdbuild.xmsgs
barrel_shifter/_xmsgs/par.xmsgs
barrel_shifter/_xmsgs/pn_parser.xmsgs
barrel_shifter/_xmsgs/trce.xmsgs
barrel_shifter/_xmsgs/xst.xmsgs
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx/notopt
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx/opt
barrel_shifter/xst/dump.xst/barrel_shifter.prj/ngx
barrel_shifter/xst/dump.xst/barrel_shifter.prj
barrel_shifter/xst/work/sub00
barrel_shifter/xst/dump.xst
barrel_shifter/xst/projnav.tmp
barrel_shifter/xst/work
barrel_shifter/ipcore_dir
barrel_shifter/iseconfig
barrel_shifter/xlnx_auto_0_xdb
barrel_shifter/xst
barrel_shifter/_ngo
barrel_shifter/_xmsgs
barrel_shifter
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