Intel® Quartus® Prime Pro Edition User Guide: Design Compilation

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ID 683236
Date 3/28/2022
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Document Table of Contents
Document Table of Contents x
1. Answers to Top FAQs 2. Design Compilation 3. Reducing Compilation Time 4. Intel® Quartus® Prime Pro Edition User Guide Design Compilation Archives A. Intel® Quartus® Prime Pro Edition User Guides
2. Design Compilation x
2.1. Compilation Overview 2.2. Using the Compilation Dashboard 2.3. Design Synthesis 2.4. Design Place and Route 2.5. Incremental Optimization Flow 2.6. Fast Forward Compilation Flow 2.7. Full Compilation Flow 2.8. Exporting Compilation Results 2.9. Integrating Other EDA Tools 2.10. Synthesis Language Support 2.11. Compiler Optimization Techniques 2.12. Synthesis Settings Reference 2.13. Fitter Settings Reference 2.14. Design Compilation Revision History
2.1. Compilation Overview x
2.1.1. Compilation Flows 2.1.2. Compilation Hierarchy 2.1.3. Compilation Monitoring
2.3. Design Synthesis x
2.3.1. Running Synthesis 2.3.2. Viewing Synthesis Reports
2.3.1. Running Synthesis x
2.3.1.1. Preserving Registers During Synthesis 2.3.1.2. Preserving Signals for Monitoring and Debugging
2.4. Design Place and Route x
2.4.1. Running the Fitter 2.4.2. Viewing Fitter Reports
2.4.1. Running the Fitter x
2.4.1.1. Fitter Commands 2.4.1.2. Disabling or Enabling Physical Synthesis Optimization
2.4.2. Viewing Fitter Reports x
2.4.2.1. Plan Stage Reports 2.4.2.2. Place Stage Reports 2.4.2.3. Route Stage Reports 2.4.2.4. Retime Stage Reports 2.4.2.5. Finalize Stage Reports
2.4.2.2. Place Stage Reports x
2.4.2.2.1. Global Signal Visualization Report
2.4.2.3. Route Stage Reports x
2.4.2.3.1. Global Router Congestion Hotspot Summary Report 2.4.2.3.2. Global Router Wire Utilization Map Report
2.5. Incremental Optimization Flow x
2.5.1. Concurrent Analysis During Synthesis or Fitting 2.5.2. Analyzing Compiler Snapshots 2.5.3. Validating Periphery (I/O) after the Plan Stage
2.5.2. Analyzing Compiler Snapshots x
2.5.2.1. Running Snapshot Viewer
2.5.2.1. Running Snapshot Viewer x
2.5.2.1.1. Analyzing Failing Paths with Snapshot Viewer 2.5.2.1.2. Analyzing Clocking with Snapshot Viewer 2.5.2.1.3. Analyzing High Fan-out Nets with Snapshot Viewer 2.5.2.1.4. Validating Timing Constraints with Snapshot Viewer 2.5.2.1.5. Analyzing Congestion with Snapshot Viewer
2.6. Fast Forward Compilation Flow x
2.6.1. Step 1: Run Register Retiming 2.6.2. Step 2: Review Retiming Results 2.6.3. Step 3: Run Fast Forward Compile 2.6.4. Step 4: Review Fast Forward Results 2.6.5. Step 5: Implement Fast Forward Recommendations 2.6.6. Retiming Restrictions and Workarounds
2.6.2. Step 2: Review Retiming Results x
2.6.2.1. Locate Critical Chains
2.6.3. Step 3: Run Fast Forward Compile x
2.6.3.1. Fast Forward Compile By Hierarchy 2.6.3.2. HyperFlex Settings
2.6.4. Step 4: Review Fast Forward Results x
2.6.4.1. Clock Fmax Summary Report 2.6.4.2. Fast Forward Details Report
2.7. Full Compilation Flow x
2.7.1. Full Compilation Flow with Temporary Optimization Mode
2.8. Exporting Compilation Results x
2.8.1. Exporting a Version-Compatible Compilation Database 2.8.2. Importing a Version-Compatible Compilation Database 2.8.3. Creating a Design Partition 2.8.4. Exporting a Design Partition 2.8.5. Reusing a Design Partition 2.8.6. Viewing Quartus Database File Information 2.8.7. Clearing Compilation Results
2.8.6. Viewing Quartus Database File Information x
2.8.6.1. QDB File Attribute Types
2.9. Integrating Other EDA Tools x
2.9.1. Generating a VQM Netlist for other EDA Tools
2.10. Synthesis Language Support x
2.10.1. Verilog and SystemVerilog Synthesis Support 2.10.2. VHDL Synthesis Support
2.10.1. Verilog and SystemVerilog Synthesis Support x
2.10.1.1. Verilog HDL Input Settings (Settings Dialog Box) 2.10.1.2. Design Libraries 2.10.1.3. Verilog HDL Configuration 2.10.1.4. Initial Constructs and Memory System Tasks 2.10.1.5. Verilog HDL Macros
2.10.1.3. Verilog HDL Configuration x
2.10.1.3.1. Hierarchical Design Configurations
2.10.2. VHDL Synthesis Support x
2.10.2.1. VHDL Input Settings (Settings Dialog Box) 2.10.2.2. VHDL Standard Libraries and Packages 2.10.2.3. VHDL wait Constructs 2.10.2.4. VHDL-2019 Conditional Analysis Tool Directives
2.11. Compiler Optimization Techniques x
2.11.1. Compiler Optimization Modes 2.11.2. Allow Register Retiming 2.11.3. Automatic Gated Clock Conversion 2.11.4. Enable Intermediate Fitter Snapshots 2.11.5. Fast Preserve Option 2.11.6. Fractal Synthesis Optimization
2.11.6. Fractal Synthesis Optimization x
2.11.6.1. Enabling or Disabling Fractal Synthesis
2.12. Synthesis Settings Reference x
2.12.1. Advanced Synthesis Settings
3. Reducing Compilation Time x
3.1. Factors Affecting Compilation Results 3.2. Strategies to Reduce the Overall Compilation Time 3.3. Reducing Synthesis Time and Synthesis Netlist Optimization Time 3.4. Reducing Placement Time 3.5. Reducing Routing Time 3.6. Reducing Static Timing Analysis Time 3.7. Setting Process Priority 3.8. Reducing Compilation Time Revision History
3.2. Strategies to Reduce the Overall Compilation Time x
3.2.1. Running the ECO Compilation Flow 3.2.2. Enabling Multi-Processor Compilation 3.2.3. Using Block-Based Compilation
3.3. Reducing Synthesis Time and Synthesis Netlist Optimization Time x
3.3.1. Settings to Reduce Synthesis Time and Synthesis Netlist Optimization Time 3.3.2. Use Appropriate Coding Style to Reduce Synthesis Time
3.4. Reducing Placement Time x
3.4.1. Placement Effort Multiplier Settings
3.5. Reducing Routing Time x
3.5.1. Identifying Routing Congestion with the Chip Planner
3.5.1. Identifying Routing Congestion with the Chip Planner x
3.5.1.1. Areas with Routing Congestion 3.5.1.2. Congestion due to HDL Coding style
1. Answers to Top FAQs
2. Design Compilation
3. Reducing Compilation Time
4. Intel® Quartus® Prime Pro Edition User Guide Design Compilation Archives
A. Intel® Quartus® Prime Pro Edition User Guides

2.9.1. Generating a VQM Netlist for other EDA Tools

The EDA Netlist Writer (quartus_eda) can generate a node-level netlist in Verilog Quartus Mapping File (.vqm) format for use in other EDA tools. You can process the .vqm netlist in other EDA tools to add new modules, partition the netlist, or change connectivity. After third-party tool changes, you resynthesize and compile the .vqm in the Intel® Quartus® Prime software.

The .vqm format is standard structural Verilog RTL. The modules can be any Intel FPGA family-specific WYSIWYG type for core logic (such as, flip-flop, LUT, DSP, M20K). EDA Netlist Writer does not support .vqm for periphery modules (such as transceivers, memory interfaces, I/O, or IP including these). The RTL is a fully flattened representation of the entire design hierarchy or partition. The module names capture the original hierarchy, although some renaming can occur to legalize names. There is no truncation of the netlist module names.

To perform .vqm netlist partitioning in other EDA tools, define a design partition that includes only core logic elements. Generate the partition netlist as step 3 describes. After processing the .vqm in third-party tools, resynthesize the .vqm files either independently or as a design partition. If including a black box module instantiation in the .vqm, make connections between existing logic in the .vqm and the black box. Prior to resynthesis, specify the source file (.ip, .v, or .vqm) for the black box in the project .qsf.

VQM Netlist Generation Requirements and Limitations
Requirement or Limitation Description
Design partitions must only include core logic. Design partitions must include only flip-flops, LUTs, DSPs, and on-chip memory. The EDA Netlist Writer does not support .vqm output for periphery modules (such as transceivers, memory interfaces, I/O, or IP that includes these).
Analysis & Synthesis does not support some special characters in instance names that are legal in SystemVerilog. Analysis & Synthesis resolves these characters by placing the standard escape character ‘\’ to escape the special character present in the RTL. If any of the hierarchical constraints (for example, SDC timing constraints) explicitly reference such a special character, modify these characters manually.
Generate .vqm only for a synthesized netlist. The post-fit netlist includes atoms, such as wire-luts, that are not appropriate for resynthesis.
Avoid module or entity name collisions If you add a .vqm, generated from an RTL design file, to the same Intel® Quartus® Prime project that generated the .vqm, beware of potential entity or module name collisions. Name collisions can occur if the original RTL file from which the .vqm derives, and the .vqm file itself, both specify the same entity or module name. When the RTL and .vqm files are both present in the project Files list, the Compiler uses the last entry in the list.
Partition assignments might not align with the original design. .vqm generation flattens all logic within a partition unless you specify the –exclude_sub_partitions argument. Compiling a design that has assignments pertaining to a flattened partition causes an error.

To generate a .vqm for processing in other EDA tools, follow these steps:

  1. In the Intel® Quartus® Prime software, click Processing > Start > Start Analysis & Synthesis (or run quartus_syn) to synthesize the design netlist.
  2. Create a design partition containing only core logic elements for the .vqm, as Creating a Design Partition describes.
  3. To generate the .vqm in the resynthesis directory, run any of the following commands at the command prompt:
    • To write out the entire design netlist to .vqm:
      quartus_eda –resynthesis=on <project_name>
    • To write out only a specific design partition netlist to .vqm:
      quartus_eda –resynthesis=on -partition=<name> <project_name>
    • To write out any sub partition as a black-box netlist to .vqm:
      quartus_eda –resynthesis=on –exclude_sub_partitions <project_name>
      You can also combine –exclude_sub_partitions with -partition.
  4. View the resulting .vqm in the resynthesis directory, and specify the .vqm as input to your EDA tool.
  5. After processing the .vqm in another EDA tool, add the .vqm as an Intel® Quartus® Prime project design file by clicking Project > Add/Remove Files In Project). Avoid module or entity name collisions, as the VQM Netlist Generation Requirements and Limitations table describes.
  6. Run Analysis & Synthesis on the project, followed by the remaining Compiler stages.
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