The other two points will serve to disclose the essential notion that the identity of ignorance is both limited and ever-expanding. , there are several steps that designers need to follow: Specify “notranslate modules” for blackboxing if the module is a macro, or the module has been LECed in block level, Set certain constraints, for example, when comparing between RTL and synthesis netlist, set case analysis to ignore scan ports, is the next step. ; Europe's 2nd and 3rd seeds will be determined at the LEC 2019 Regional Finals: . on What is Conformal LEC flow? Sorry, your blog cannot share posts by email. Compare. These 152 flip-flops reported as non-equivalent are the multibit flops. Top 4 teams in Championship Points (minus teams already qualified for Worlds 2019) participate in the Regional Finals. Note: Make sure you select Conformal LEC in the Tool name list in the Formal Verification page of the Settings dialog box. : Roughly 17 years ago, a new business book came out, "The Tipping Point", that emphasized how little things Fusion Compiler benchmark - DeepChip.com Synopsys Cadence ... GRLIB. Example 19–1. The following conditions produce mismatches (either unmapped on non-equivalent points) between the golden (Synplify-generated Verilog Quartus ® Mapping File (.vqm) and revised (Quartus II-generated VQM File) netlists when performing formal verification with the Conformal LEC and Quartus II software:. A typical session 62 SETUP Saving LEC transcript to a log file [Specifying black boxes] Reading libraries and designs Specifying design constraints [Specifying modeling directives] LEC Mapping process Resolving unmapped key points Compare process Debugging non-equivalent key points … This approach typically works really well. will be the last step. The Conformal LEC software reports the mapped, unmapped, and compared points in the Mapped Points, Unmapped Points, and Compared Points windows, respectively. How does Conformal LEC perform key point mapping? While the IP Library user’s manual is suited Teams are awarded points based on their performances in their respective Spring and Summer Split. Once mapping is clean, that means there are no unmapped key points, or unmapped key points present only in the golden, we can go for comparison. Note: In the Compared Points window, the Encounter Conformal software denotes equivalent points with a green dot, and non-equivalent points with a red dot. Not-mapped unmapped points are key points that are reachable but do not have a corresponding point in the logic fan-in cone of the corresponding … by chipressian.In ASIC Design Engineer, Broadcom, Cadence, Digital Design Engineer, IC Design Engineer, Intel, Marvell, Nvidia, Physical Design Engineer, Qualcomm, Synopsys, Xilinx.1 Comment on What is Conformal LEC flow? If the Conformal LEC software does not find the same optimization s, it can lead to unmapped points in the golden netlist. Add all ports as compare points 4. , designers will typically dump the following reports: report unmapped points (-unreachable, -notmapped, -extra), report black box (check if there’s any unexpected black boxes), report renaming rule (this guides how LEC performs key point mapping). lec unreachable Here is the Scenario of the Problem I am facing. There are 2 LEC mapping method, i.e., name-based and function-based. Unreachable means these key points do not have an observable point. Unreachable unmapped points are key points that do not have an observable point, such as a primary output. In LEC setup, there are several steps that designers need to follow: LEC key point mapping is the next step. To investigate the results of the verification, click the Mapping Managericon in the toolbar, or choose Mapping Manager. The guide complements the GRLIB IP Library User’s Manual and the GRLIB IP Core User’s Manual. Debugging typically starts from unmapped points, and possible root cause includes: Not mapped BBOX pins causes NEQs (Use renaming rule if pins names not matched), Not mapped DFF/DLATCH/CUT/PI causes NEQs (Optimize and merge DFF/DLATCH in LEC; Resolve unbalanced loop cutting; Constrain test/scan signals), Incorrect mapping causes NEQs (Remap the incorrectly mapped pairs manually), Unbalanced floating signals can cause NEQs (Tie off floating pins in RTL, or use “add tie signal” to individually tie each floating Z), Logic optimized differently b/w LEC and implementation causing NEQs, Debug phase mapping (Recommended: turn off phase inversion in synthesis; Or auto analysis & remap with phase), Balanced but opposite optimization constant, Front End Design Checklist - Chipress Academy. The two Teams which gained the lowest amount of Championship Points will compete in Match 1. ; The following four teams ranked by Championship Points will qualify for Regional Qualifier.. By default, Conformal LEC will first do name-based mapping, followed by function-based mapping. as the key points in both reference design and revised design; then pair corresponding reference and revised key points, and perform. The sample non-equivalent file below shows the 152 compare points that are failing in in LEC. LEC> add compared points —all // Command: add compared points —all // 3 compared points added to compare list LEC> compare // Command: compare Mapped points: Mapped points SYSTEM class T . In this step, Conformal LEC will first identify primary inputs and outputs, DFF, Latch, Blackboxes, etc. How does Conformal LEC perform key point mapping? In the SETUP mode, Load the Golden and Revised Designs 2. > [ 32.635807] lkdtm: No crash points registered, enable through debugfs > [ 32.645522] Phantom Linux Driver, version n0.9.8, init OK > [ 32.656342] Silicon Labs C2 port support v. 0.51.0 - (C) 2007 Rodolfo Giometti > [ 32.668401] c2port c2port0: C2 port uc added, 1. report renaming rule (this guides how LEC performs key point mapping) LEC non-equivalence debug will be the last step. This time the Revised Design has been created by changing some Constarints in … Compared Points Support Size Cancel CONFORMAL-LEC Mapping Manager Refresh Window Schematics . Then it compares these mapped points (PO, DFF, DLAT, BBOX, E, Z, CUT but NOT PI) to determine if they are equiv or not. The winner of the LEC 2019 Summer Playoffs automatically qualifies (AQ) for the Worlds 2019 Main Event as Europe's 1st seed. The Encounter Conformal software reports the mapped, unmapped, and compared points in the Mapped Points, Unmapped Points, and Compared Points windows, respectively. Unreachable unmapped points are key points that do not have an observable point, such as a primary output. unmapped points in lec, POINT? as the key points in both reference design and revised design; then pair corresponding reference and revised key points, and perform LEC comparison after that. Compared Points Support Size Cancel CONFORMAL-LEC Mapping Manager Refresh Window Schematics . In LEC report generation, designers will typically dump the following reports: LEC non-equivalence debug will be the last step. Debugging typically starts from unmapped points, and possible root cause includes: After resolving all mapping issues, designers can start debugging real mismatches, and possible root cause includes: This site uses Akismet to reduce spam. Not-mapped unmapped points are key points that are reachable but do not have a corresponding point in the logic fan-in cone of the … Post was not sent - check your email addresses!
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