Altera® Quartus® Prime Standard Edition Settings File Reference Manual

ID 683084
Date 5/08/2017
Public
Document Table of Contents

1.2.155. 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

  • HardCopy II
  • HardCopy III
  • HardCopy IV

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