Altera Quartus II Settings File - Manual (Page 162)

SHIFT_REGISTER_RECOGNITION_ACLR_SIGNAL
Allows the Compiler to find a group of shift registers of the same length that can be replaced with the
altshift_taps megafunction. The shift registers must all use the same aclr signals, must not have any other
secondary signals, and must have equally spaced taps that are at least three registers apart. To use this
option, you must turn on the Auto Shift Register Replacement logic option.
Type
Boolean
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 SHIFT_REGISTER_RECOGNITION_ACLR_SIGNAL <value>
set_global_assignment -name SHIFT_REGISTER_RECOGNITION_ACLR_SIGNAL -entity
<entity name> <value>
set_instance_assignment -name SHIFT_REGISTER_RECOGNITION_ACLR_SIGNAL -to
<to> -entity <entity name> <value>
Default Value
On
Example
set_global_assignment -name shift_register_recognition_aclr_signal off
set_instance_assignment -name shift_register_recognition_aclr_signal off -
to foo
162 SHIFT_REGISTER_RECOGNITION_ACLR_SIGNAL
MNL-Q21005
2015.05.04
Altera Corporation Quartus Settings File Reference Manual
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