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places and routes the optimized circuit on the given FPGA architecture. There are some additional optional tools that can process the VTR output further. For example, the FASM FPGA Assembly tool can produce programming bitstreams for some commercial FPGAs (Xilinx Artix and
Lattice ice40) at the end of the VTR flow, while the OpenFPGA tool integrates with VTR to produce a standard cell layout of a novel (proposed) FPGA. It is also possible to use different tools for the first (HDL synthesis) stage of the VTR flow; for example the Titan Flow uses Quartus to perform the HDL to logic synthesis stage, and then VPR to perform placement and routing, while
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180:, on a given FPGA architecture for research and development purposes; the FPGA architecture targeted could be a novel architecture that a researcher wishes to explore, or it could be an existing commercial FPGA whose architecture has been captured in the VTR input format. The VTR project has many contributors, with lead collaborating universities being the
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Murray, Kevin E.; Petelin, Oleg; Zhong, Sheng; Wang, Jia Min; ElDafrawy, Mohamed; Legault, Jean-Philippe; Sha, Eugene; Graham, Aaron G.; Wu, Jean; Walker, Matthew J. P.; Zeng, Hanqing; Patros, Panagiotis; Luu, Jason; Kent, Kenneth B.; Betz, Vaughn (2020). "VTR 8: High
Performance CAD and Customizable
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The VTR design flow usually consists of three main component applications: ODIN II which compiles
Verilog code to a circuit in Berkeley Logic Interchange Format (BLIF), a human-readable graph representation of the circuit; ABC which optimizes the BLIF circuit produced by ODIN II; and VPR which packs,
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compiler of the VTR flow. It transforms a given
Verilog code to a BLIF circuit, performs code and circuit optimizations, visualizes circuits, and performs partial mapping of logic to available hard blocks of the given architecture. Also, it can simulate the execution of circuits both for validation
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The FPGA Assembly (genfasm) tool will produce a programming bitstream from a VTR implementation (placement and routing of a circuit) on commercial architectures for which complete VTR architecture files describing the FPGA device have been produced. Currently this includes the Xilinx Artix and
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Luu, Jason; Ahmed, Nooruddin; Kent, Kenneth B.; Anderson, Jason; Rose, Jonathan; Betz, Vaughn; Goeders, Jeffrey; Wainberg, Michael; Somerville, Andrew; Yu, Thien; Nasartschuk, Konstantin; Nasr, Miad; Wang, Sen; Liu, Tim (2014). "VTR 7.0: Next
Generation Architecture and CAD System for FPGAs".
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matching the hardware of the FPGA. During placement, these logic blocks as well as hard blocks are assigned to the available hardware resources of the FPGA. Finally, during routing the signal connections between blocks are made. VPR is primarily developed by the
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From the
Verilog to Routing website, it is noted: "Odin-II has been deprecated and will be removed in a future version. Now VTR uses Parmys as the default frontend which utilizes Yosys as elaborator with partial mapping features enabled."
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Rose, Jonathan; Luu, Jason; Yu, Chi Wai; Densmore, Opal; Goeders, Jeffrey; Somerville, Andrew; Kent, Kenneth B.; Jamieson, Peter; Anderson, Jason (2012). "The VTR project: Architecture and CAD for FPGAs from verilog to routing".
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Murray, Kevin; Whitty, Scott; Liu, Suya; Luu, Jason; Betz, Vaughn (2015). "Timing-Driven Titan: Enabling Large
Benchmarks and Exploring the Gap Between Academic and Commercial CAD".
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Jamieson, Peter; Kent, Kenneth B.; Gharibian, Farnaz; Shannon, Lesley (2010). "Odin II - an Open-Source
Verilog HDL Synthesis Tool for CAD Research".
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Nasartschuk, Konstantin; Herpers, Rainer; Kent, Kenneth B. (2012). "Visualization support for FPGA architecture exploration".
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Versatile Place and Route (VPR) is the final component of VTR. Its input is a BLIF circuit, which it packs,
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During packing, neighboring and related logic elements of the circuit are clustered together into
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Proceedings of the ACM/SIGDA international symposium on Field
Programmable Gate Arrays - FPGA '12
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as well as power, performance and heat analysis. ODIN II is maintained by the
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devices. VTR's main purpose is to map a given circuit described in
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Lattice ice40 FPGA families. This tool is primarily developed by
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ACM Transactions on Reconfigurable Technology and Systems
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ACM Transactions on Reconfigurable Technology and Systems
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synthesis tool followed by VPR placement and routing.
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619:Field-Programmable Logic and Applications
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1219:Electronic design automation software
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621:. Springer Berlin Heidelberg. 1997.
279:University of California, Berkeley
192:. Additional contributors include
190:University of California, Berkeley
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297:on an input FPGA architecture.
357:FPGA Architecture Modelling".
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178:Hardware Description Language
42:8.0.0 / 24 March 2020
125:Electronic Design Automation
277:. ABC is maintained by the
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186:University of New Brunswick
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765:Circuit underutilization
748:Reconfigurable computing
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161:(VTR) is an open source
27:The VTR Development Team
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78:/vtr-verilog-to-routing
468:Oct Tools Distribution
198:The University of Utah
775:Hardware acceleration
307:University of Toronto
182:University of Toronto
44:; 4 years ago
965:Microchip Technology
770:High-level synthesis
571:10.1109/FCCM.2010.31
565:. pp. 149–156.
524:. pp. 128–134.
202:Princeton University
1034:Intel Quartus Prime
760:Soft microprocessor
332:Intel Quartus Prime
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397:(2): 1–30.
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343:References
188:, and the
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63:Repository
49:2020-03-24
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493:(2): 10.
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233:uses the
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925:Achronix
884:C to HDL
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1013:Stratix
975:Siemens
960:Lattice
945:Cadence
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606:. 2009.
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241:ODIN II
174:Verilog
143:Website
132:License
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216:, and
206:Altera
194:Google
184:, the
72:github
955:Intel
935:Aldec
894:MyHDL
820:VITAL
585:S2CID
544:S2CID
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235:Yosys
210:Intel
1161:1200
1118:Nios
1098:LEON
899:ELLA
879:CUPL
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854:Lola
844:AHDL
810:VHDL
743:PSoC
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718:CPLD
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696:ASIC
575:ISBN
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313:FASM
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273:and
176:, a
170:FPGA
168:for
166:flow
150:.org
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74:.com
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1141:JOP
1088:ARC
1054:VTR
1008:iCE
970:NXP
940:Arm
930:AMD
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859:PSL
832:DPI
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728:PLA
701:SoC
567:doi
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285:VPR
265:ABC
247:HDL
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