仅对英特尔可见 — GUID: qvz1585251861190
Ixiasoft
1.1. 编译概述
1.2. 使用Compilation Dashboard
1.3. 设计网表基础设施
1.4. 使用Node Finder
1.5. Precompiled Component (PCC)生成流程
1.6. Analysis & Elaboration流程
1.7. 设计综合
1.8. 设计布局和布线
1.9. 增量式优化流程
1.10. 快进编译流程(Fast-Forward Compilation Flow)
1.11. 完整编译流程(Full Compilation Flow)
1.12. 编译监控模式
1.13. 导出编译结果
1.14. 集成其他EDA工具
1.15. Compiler优化技术
1.16. 综合语言支持
1.17. 综合设置参考
1.18. Fitter设置参考
1.19. 设计编译修订历史
仅对英特尔可见 — GUID: qvz1585251861190
Ixiasoft
1.10.3.1. 按层次Fast Forward编译
启用后,默认Fast Forward编译将在整个设计层次上运行。您也可以指定Enable Hyper-Retimer Fast Forward Hierarchy analysis during compilation约束以便在Fast Forward编译期间包含或不包含特定设计子层次和实例。此技术允许您将Fast Forward报告和优化工作效力集中在设计的特定区域。按层次结构进行Fast Forward编译生成的报告与对整个层次结构进行的Fast Forward编译生成的报告相同。
按照以下步骤以在Fast Forward编译期间包含或不包含特定设计子层次结构和实例:
- 要在完整编译过程中启用可选的Fast Forward Compilation,请在Compilation Dashboard上打开Fast Forward Timing Closure Recommendations或者将以下任务添加到工程.qsf中:
set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON
图 103. 使能Fast Forward Timing Closure Recommendations - 要从Fast Forward Compilation中排除特定层次结构或实体,请在Assignment Editor中,将Enable Hyper-Retimer Fast Forward Hierarchy analysis during compilation约束设置为Off,或者将以下约束添加到您需要排除的每个层次或实体的工程.qsf中:
set_global_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF \ <INSTANCE MODULE NAME>
- 要将特定层次或实体包含到Fast Forward Compilation中,请在Assignment Editor中,将Enable Hyper-Retimer Fast Forward Hierarchy analysis during compilation约束设置为On,或者将以下约束添加到您需要包含的每个层次结构或实体的工程.qsf中:
set_global_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY ON \ <INSTANCE MODULE NAME>
- 在Compilation Dashboard上点击Fast Forward Timing Closure Recommendations,阶段,或单击Processing > Start Compilation来运行包含Fast Forward Compile的完整编译。
您可以在单个.qsf内部对同一实例混合使用ON和OFF约束。如果您将混合的ON和OFF约束分配给同一实例,则.qsf中排在最后的约束优先运行。
如果要对设计中的层次结构子集执行Fast Forward分析,请关闭要从分析中省略的所有层次结构的Fast Forward分析。否则,请从根层次结构关闭Fast Forward分析,并打开要分析的层次结构的Fast Forward分析。以下示例显示了其中一些约束组合,请参阅设计层次结构实例。
图 104. 设计层次结构实例
# This runs Fast Forward Compile on the entire hierarchy: A,B,C,D,E,F # This produces the same result as if FAST_FORWARD_HIERARCHY was not set in the QSF set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY ON -to |
# Runs Fast Forward Compile on B and E only, ignores A,C,D,F set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to | set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY ON -to B
# Runs Fast Forward Compile on C only, ignores A,B,D,E,F set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to | set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY ON -to C set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to F
# ON instance HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY takes precedence # Fast Forward Compile runs on only C and F # If the assignments were reversed then FFC would not run set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to | set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to C set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY ON -to C
# This runs on A,B,C,F set_global_assignment -name FLOW_ENABLE_HYPER_RETIMER_FAST_FORWARD ON set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to D set_instance_assignment -name HYPER_RETIMER_FAST_FORWARD_ON_HIERARCHY OFF -to E
注: 实例约束适用于布局布线后网表。因此,您可能需要定义设计分区。否则,实例名称可能会在综合期间发生变化,从而导致意外的约束结果。请参阅创建设计分区。