SRL_TO_REG - 2023.2 English

Vivado Design Suite Properties Reference Guide (UG912)

Document ID
Release Date
2023.2 English

An SRL primitive can be converted to a logically equivalent chain of register primitives using the SRL_TO_REG property with a value of true. This transform is typically used to increase the number of available pipeline register stages that can be spread to allow signals to traverse long distances within a device.

Architecture Support
All architectures.
Applicable Objects
Cells (get_cells) as leaf level SRL instances.
  • 1: The Vivado logic optimization will pull out a register from the specified SRL primitive(s) input.


Verilog Syntax

Not applicable

VHDL Syntax

Not applicable

XDC Syntax
set_property SRL_TO_REG <True | False> <objects>

The property is false by default. The objects should be static shift registers which can be instantiated or inferred, e.g., SRL16E, SRL32E.

XDC Example:

set_property SRL_TO_REG 1 [get_cells {cell1 cell2}]

Affected Steps

  • Opt Design