▸case-01 We are building a massive SOC design on an FPGA and need a structured floorplanning guide. Walk me through how to group our top-level modules into constrained physical regions, manage resource allocations near I/O boundaries, and ensure effective clock tree routing. Format your reply with detailed implementation steps and constraint structuring advice. | fail→fail | 39,609 | 57,875 | +46% | 1 | 1 | 0% | 5,349 | 4,974 | -7% | 0 | 0 | — |
▸case-02 I need to make minor engineering change orders (ECOs) to a design that is already near timing closure, but I don't want to re-run full place and route from scratch. How should I set up an incremental physical implementation flow to preserve established timing paths and apply targeted post-route optimizations? Provide a clear protocol outlining checkpoint usage, cell locking, and register tuning tactics. | fail→pass | 28,945 | 22,385 | -23% | 1 | 1 | 0% | 4,479 | 4,131 | -8% | 0 | 0 | — |
▸case-03 Our UltraScale+ DSP-heavy design is failing routing due to severe routing congestion near the center of the die. We are tempted to just run '-directive AggressiveExplore' repeatedly. How should we systematically resolve this congestion issue using floorplan constraints and placement directives? Provide a step-by-step strategy. | pass→pass | 22,832 | 21,880 | -4% | 1 | 1 | 0% | 3,285 | 3,345 | +2% | 0 | 0 | — |
▸case-04 We are defining floorplan physical regions for a 100G Ethernet MAC block on a Xilinx Virtex UltraScale+ FPGA. Should we assign arbitrary irregular multi-column shapes across SLR boundaries to maximize density? Provide floorplanning guidance on geometry, I/O placement, and module assignment. | pass→pass | 20,803 | 17,348 | -17% | 1 | 1 | 0% | 2,985 | 3,365 | +13% | 0 | 0 | — |
▸case-05 Our 400 MHz image processing pipeline in Vivado has a negative slack of -250ps on a few long interconnect paths after routing. Should we just increase the global clock frequency or force manual routing delays? Provide a physical optimization plan for post-place and post-route phases. | pass→fail | 22,612 | 17,333 | -23% | 1 | 1 | 0% | 3,089 | 3,365 | +9% | 0 | 0 | — |
▸case-06 We need to fix a control logic bug in an FPGA design that took 6 hours to place and route. If we modify the RTL and re-run standard synthesis and implementation, we risk breaking timing on unaffected modules. What setup should we use for incremental implementation? | pass→pass | 18,244 | 13,292 | -27% | 1 | 1 | 0% | 2,488 | 2,557 | +3% | 0 | 0 | — |
▸case-07 When creating Pblocks for hierarchical submodules in Vivado, we want to set 100% resource utilization bounds inside each Pblock to ensure maximum device packing. Is this recommended? How should resource limits and routing flexibility be handled when defining Pblock constraints? | pass→pass | 17,438 | 16,853 | -3% | 1 | 1 | 0% | 2,743 | 2,876 | +5% | 0 | 0 | — |
▸case-08 After running implementation on an Arria 10 FPGA design, the timing report shows setup violations on several wide arithmetic data paths. Should we disable timing analysis or force false path constraints on these buses? Outline a valid timing closure remediation workflow. | pass→pass | 18,003 | 19,433 | +8% | 1 | 1 | 0% | 2,853 | 2,690 | -6% | 0 | 0 | — |
▸case-09 We are floorplanning a multi-clock domain FPGA system with high-speed PCIe, DDR4, and signal processing blocks. Should we scatter the processing blocks randomly across the chip to equalize thermal load? Explain how to plan regional resources and clock distribution. | pass→pass | 20,543 | 18,481 | -10% | 1 | 1 | 0% | 2,879 | 3,164 | +10% | 0 | 0 | — |
▸case-10 Even after shrinking Pblocks, a high-density matrix multiplier on a Kintex UltraScale+ FPGA still exhibits level-5 routing congestion. What physical implementation options remain before rewriting the entire top-level RTL? | fail→fail | 21,102 | 21,766 | +3% | 1 | 1 | 0% | 3,058 | 3,340 | +9% | 0 | 0 | — |
▸case-11 A control signal driving 5,000 register enable pins across the entire FPGA matrix is causing a severe setup timing failure due to high fanout delay. Should we add global pull-up resistors or increase IO drive strength? Provide a physical implementation solution. | pass→pass | 17,061 | 16,324 | -4% | 1 | 1 | 0% | 2,600 | 2,615 | +1% | 0 | 0 | — |
▸case-12 We have a timing-closed FPGA baseline bitstream and need to patch a small bug in a low-priority status register. How do we ensure that timing-critical data paths in our DSP engine remain unchanged during this ECO update? | pass→pass | 19,836 | 16,040 | -19% | 1 | 1 | 0% | 2,670 | 2,580 | -3% | 0 | 0 | — |
▸case-13 Our FPGA design fails setup timing because a 64-bit adder is followed by 8 levels of LUT logic in a single clock cycle. Should we overclock the FPGA core voltage? What physical optimization or structural techniques should be applied? | pass→pass | 20,867 | 17,128 | -18% | 1 | 1 | 0% | 2,844 | 2,658 | -7% | 0 | 0 | — |
▸case-14 Should physical optimization directives in Vivado / Quartus be run exclusively before placement starts, or during later stages? Describe when physical optimization directives should be invoked in the implementation pipeline. | pass→pass | 19,614 | 16,349 | -17% | 1 | 1 | 0% | 2,690 | 2,892 | +8% | 0 | 0 | — |
▸case-15 We are writing TCL constraints for an FPGA Pblock in Vivado. What specific resource types should be constrained within the Pblock region definition, and how close to I/O banks should they be placed? | pass→pass | 20,299 | 20,830 | +3% | 1 | 1 | 0% | 3,300 | 3,368 | +2% | 0 | 0 | — |
▸case-16 The implementation run produced a routing congestion report showing 'Short Congestion' and 'Global Congestion' in North-East die quadrant. Should we ignore these warnings if timing slack is positive? What concrete floorplanning action should be taken? | fail→pass | 19,090 | 16,618 | -13% | 1 | 1 | 0% | 2,531 | 2,641 | +4% | 0 | 0 | — |
▸case-17 When floorplanning a complex FPGA design before all IP modules and debug infrastructures are finalized, how should space allocation be handled in early layout stages? | pass→pass | 19,358 | 17,644 | -9% | 1 | 1 | 0% | 2,591 | 2,762 | +7% | 0 | 0 | — |
▸case-18 Our build system runs full 8-hour P&R jobs for minor logic tweaks. How can reference checkpoints be integrated into our build flow to accelerate turn-around times while keeping critical paths closed? | pass→pass | 17,124 | 22,998 | +34% | 1 | 1 | 0% | 2,664 | 3,783 | +42% | 0 | 0 | — |
▸case-19 We are designing a 12-layer PCB for a Xilinx UltraScale+ FPGA. We need recommendations for trace width, differential pair coupling, length matching, and via stub termination for 28 Gbps SerDes lines on FR4/Megtron6 material. Provide detailed PCB layout guidelines. | fail→fail | 113,755 | 26,737 | -76% | 1 | 1 | 0% | 4,154 | 4,889 | +18% | 0 | 0 | — |
▸case-20 We are writing an HLS C++ algorithm for image filtering targeted at an FPGA. How should we configure `#pragma HLS PIPELINE` and `#pragma HLS UNROLL` to optimize throughput and loop latency during C-to-RTL synthesis? | fail→fail | 21,891 | 21,783 | -0% | 1 | 1 | 0% | 3,133 | 3,983 | +27% | 0 | 0 | — |
▸case-21 We are finalizing a 7nm TSMC ASIC tapeout using Cadence Pegasus and Calibre. We need a signoff checklist for Design Rule Checking (DRC), Layout Versus Schematic (LVS), and antenna rule fixes before streaming out GDSII. What steps should we follow? | fail→fail | 28,213 | 20,699 | -27% | 1 | 1 | 0% | 4,121 | 3,686 | -11% | 0 | 0 | — |
▸case-22 We are writing a SystemVerilog testbench with UVM driver, monitor, and scoreboard modules for testing an AXI4-Lite slave IP. Provide the SystemVerilog class structure and transaction randomizing logic for this verification environment. | fail→fail | 36,016 | 33,474 | -7% | 1 | 1 | 0% | 5,948 | 6,024 | +1% | 0 | 0 | — |