AUTOPIPELINE_INCLUDE - 2022.1 English

Vivado Design Suite Properties Reference Guide

Document ID
UG912
Release Date
2022-06-08
Version
2022.1 English
AUTOPIPELINE_INCLUDE

AUTOPIPELINE_INCLUDE

The AUTOPIPELINE_INCLUDE property specifies the name of another AUTOPIPELINE_GROUP to include when applying the AUTOPIPELINE_LIMIT. The normal usage scenario is in the forward and response shakehands protocal paths, one direction is defined as a “forward” group using AUTOPIPELINE_GROUP, and the other direction is defined as a primary “response” group using AUTOPIPELINE_GROUP, while adding reference to the forward group, so the round-trip path would share the maximum limit as defined.

Architecture Support

UltraScale, UltraScale+, Versal ACAP.

Applicable Objects

Nets (get_nets)

Cells (get_cells)

Each single net should be directly driven by a flip-flop, and the fanout load can only be 1.

Value

<group_name>: This is a unique string value that can be assigned to one or more nets. The signals with a same auto-pipeline include group name must receive an equal number of auto-inserted pipeline flip-flops.

Syntax

VHDL Example Syntax

attribute autopipeline_include : string;

attribute autopipeline_group : string;

attribute autopipeline_limit : integer;

signal mywire: std_logic_vector(2 downto 1);

signal mybus: std_logic_vector(2 downto 1);

attribute autopipeline_group of mywire: signal is "sub_group";

attribute autopipeline_group of mybus: signal is "primary_group";

attribute autopipeline_include of mybus: signal is "sub_group";

attribute autopipeline_limit of mybus: signal is "12”;

Verilog Example Syntax

(* autopipeline_group="sub_group”*) wire mywire;

(* autopipeline_group="primary_group", autopipeline_limite= 12, autopipeline_include="sub_group"*)  wire mybus;

XDC Example Syntax

set_property AUTOPIPELINE_GROUP primary_group [get_nets mywire]

set_property AUTOPIPELINE_INCLUDE sub_group [get_nets mywire]

The sub_group is included in the primary_group, and shares the maximum limit of 12 stages.

Affected Steps

Place Design

Phys Opt Design