Altera Quartus II Settings File - Manual (Page 185)

USE_HIGH_SPEED_ADDER
Tells the Compiler whether to use high speed adder circuitry to implement arithmetic functions or not.
This option is useful for improving the performance of the design when set to On and minimizing the
total number of HCells used in the design when set to Off. This option applies to HardCopy series devices
only. It can only be used as a project-wide option. This option defaults to Auto, which has the same
behavior as On when the Optimization Technique is set to Speed or Balanced, and as Off when the
Optimization Technique is set to Area.
Type
Enumeration
Values
• Auto
• Off
• On
Device Support
This setting can be used in projects targeting any Altera device family.
Notes
This assignment is included in the Analysis & Synthesis report.
This assignment supports synthesis wildcards.
Syntax
set_global_assignment -name USE_HIGH_SPEED_ADDER <value>
set_global_assignment -name USE_HIGH_SPEED_ADDER -entity <entity name>
<value>
set_instance_assignment -name USE_HIGH_SPEED_ADDER -to <to> -entity <entity
name> <value>
Default Value
Auto
Example
set_global_assignment -name use_high_speed_adder off
MNL-Q21005
2015.05.04
USE_HIGH_SPEED_ADDER 185
Quartus Settings File Reference Manual Altera Corporation
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