Quartus II Settings File Reference Manual - Altera

6–218 Chapter 6: Fitter Assignments
OPTIMIZE_POWER_DURING_FITTING
OPTIMIZE_POWER_DURING_FITTING
Type
Controls the power-driven compilation setting of the Fitter. This option determines
how aggressively the Fitter optimizes the design for power. If you set this option to
Off, the Fitter does not perform any power optimizations. If you set this option to
Normal compilation, the Fitter performs power optimizations which should not
impact design performance or increase compile time. If you set this option to Extra
effort, the Fitter performs additional power optimizations which may affect design
performance and/or increase compile time. For the best results with Extra Effort
power optimization during fitting, you should specify a Signal Activity File (.saf) that
lists the toggle rate of each signal in the design. To generate the most accurate .saf, use
a gate-level simulation, with glitch filtering, of the compiled design. Specify this .saf
as an input to the Power Analyzer in the PowerPlay Power Analysis Settings, and
recompile the design with Extra Effort PowerPlay Power Optimization during fitting.
The signal activities (toggle rates) in the .saf help guide the Fitter to reduce power.
Enumeration
■ Extra effort
■ Normal compilation
■ Off
Device Support
This setting can be used in projects targeting the following device families:
■ Arria GX
■ Arria II GX
■ Arria II GZ
■ Arria V
■ Cyclone II
■ Cyclone III
■ Cyclone III LS
■ Cyclone IV E
■ Cyclone IV GX
■ Cyclone V
■ HardCopy II
■ HardCopy III
■ HardCopy IV
■ MAX II
■ MAX V
■ Stratix II
Quartus Settings File June 2012 Altera Corporation
Reference Manual