Revision History - 2020.2 English

The following table shows the revision history for Getting Started with Vitis HLS.

Section	Revision Summary
03/22/2021 Version 2020.2
Entire section	No changes to this section.
12/15/2020 Version 2020.2
Introduction to Vitis HLS	Updated link and note
Setting Up the Environment	Updated note
11/23/2020 Version 2020.2
Introduction to Vitis HLS	Minor updates
Vitis HLS Process Overview	Minor updates
Overview of the Vitis HLS IDE	Updated section and subsections
Enabling the Vivado IP Flow	Added
Enabling the Vitis Kernel Flow	Minor updates
Default Settings of Vivado/Vitis Flows	Added
Setting Configuration Options	Minor updates
Verifying Code with C Simulation	Minor updates
Using the Debug Perspective	Minor updates
Synthesizing the Code	Minor updates
Synthesis Summary	Added
Analyzing the Results of Synthesis	Minor updates
Schedule Viewer	Updated section
Using #define with Pragma Directives	Minor updates
C/RTL Co-Simulation in Vitis HLS	Minor updates
Interface Synthesis Requirements	Updated note
Verification of DATAFLOW and DEPENDENCE	Minor updates
Simulating IP Cores	Updated section
Viewing Simulation Waveforms	Updated section
Configuring the Vivado IP	Updated section
06/24/2020 Version 2020.1
Enabling the Vitis Kernel Flow	Grammatical edit
General updates	Cleanup of figures and pagination
06/03/2020 Version 2020.1
Initial release.	N/A

The following table shows the revision history for Vitis HLS Methodology Guide.

Section	Revision Summary
03/22/2021 Version 2020.2
Structs	Updated.
Multi-Access Pointers on the Interface	Updated.
Managing Interface Synthesis	Restructured and updated section.
Port-Level I/O: No Protocol	Removed section on ap_stable.
Block-Level I/O Protocols	Updated.
Examples of Recommended Coding Styles	Added Pipelining Between Bursts.
12/15/2020 Version 2020.2
Pointers	Minor updates
Automatic Loop Pipelining	Fixed default to 64
Unrolling Loops to Improve Pipelining	Minor updates
Managing Pipeline Dependencies	Updated title
Exploiting Task Level Parallelism: Dataflow Optimization	Minor updates
Dataflow Optimization Limitations	Updated code in Single-producer-consumer Violations section
Array Reshaping	Minor updates
11/23/2020 Version 2020.2
Introduction to Methodology Guide	Added
Unsupported C/C++ Constructs	Updated section and subsections
Impact of Coding Style	Updated code blocks
Arrays	Minor updates
Array Interfaces	Minor updates
FIFO Interfaces	Minor updates
Arbitrary Precision (AP) Data Types	Updated first paragraph and description in subsections
Floats and Doubles	Updated first paragraph
Vector Data Types	Added
Constructors, Destructors, and Virtual Functions	Removed
Using Templates to Create Unique Instances	Minor updates
Port-Level I/O: No Protocol	Updated code block
Port-Level I/O: Memory Interface Protocol	Minor updates
Details of Interface Synthesis	Minor updates
AXI4-Stream Interfaces	Updated section and subsections
Managing Interfaces with SSI Technology Devices	Updated register_all_io
Dataflow Optimization Limitations	Fixed code block in Bypassing Tasks
Controlling Hardware Implementation	Updated BIND_OP code block
06/24/2020 Version 2020.1
General updates	Cleanup of figures and pagination
06/03/2020 Version 2020.1
Initial release.	N/A

The following table shows the revision history for Vitis HLS Command Reference.

Section	Revision Summary
03/22/2021 Version 2020.2
Entire section	No changes to this section.
12/15/2020 Version 2020.2
set_directive_dataflow	Added link
set_directive_dependence	Added link
set_directive_interface	Minor updates
set_directive_pipeline	Updated description section
set_directive_shared	Updated description section
set_directive_stable	Updated description section
pragma HLS allocation	Updated section
pragma HLS array_reshape	Updated description section
pragma HLS dataflow	Added link
pragma HLS dependence	Added link
pragma HLS interface	Updated description section
pragma HLS shared	Updated description section
pragma HLS stable	Updated description section
11/23/2020 Version 2020.2
vitis_hls Command	Updated -p and added -terse
add_files	Updated section
cosim_stall	Added
csim_design	Updated section
csynth_design	Minor updates
export_design	Updated section
get_project	Added
get_solution	Added
list_part	Updated section
open_project	Minor updates
open_solution	Minor updates
open_tcl_project	Added
set_part	Minor updates
set_top	Minor updates
config_array_partition	Minor updates
config_compile	Updated section
config_dataflow	Updated section
config_export	Updated section
config_interface	Updated section
config_op	Minor updates
config_rtl	Minor updates
config_schedule	Minor updates
config_storage	Minor updates
config_unroll	Minor updates
set_directive_aggregate	Minor updates
set_directive_bind_op	Updated section
set_directive_bind_storage	Minor updates
set_directive_dependence	Updated section
set_directive_disaggregate	Minor updates
set_directive_expression_balance	Updated section
set_directive_interface	Updated section
set_directive_loop_tripcount	Minor updates
set_directive_pipeline	Minor updates
set_directive_stream	Minor updates
pragma HLS bind_op	Updated section
pragma HLS bind_storage	Updated section
pragma HLS dependence	Updated section
pragma HLS disaggregate	Updated section
pragma HLS expression_balance	Updated section
pragma HLS interface	Minor updates
pragma HLS loop_tripcount	Minor updates
pragma HLS protocol	Minor updates
06/24/2020 Version 2020.1
General updates	Cleanup of figures and pagination
06/03/2020 Version 2020.1
Initial release.	N/A

The following table shows the revision history for Vitis HLS Libraries Reference.

Section	Revision Summary
03/22/2021 Version 2020.2
Entire section	No changes to this section.
12/15/2020 Version 2020.2
Other Class Methods, Operators, and Data Members	Added note in Range Selection section
Quantization Modes	Updated AP_RND_CONV section
11/23/2020 Version 2020.2
Using Arbitrary Precision Data Types	Minor updates
Fixed-Point Identifier Summary	Added note to table
C++ Arbitrary Precision Integer Types	Updated section
Vitis HLS Math Library	Updated section
HLS Stream Library	Minor updates
Using HLS Streams	Minor updates
FIR Struct Parameter Values	Minor updates
06/24/2020 Version 2020.1
General updates	Cleanup of figures and pagination
06/03/2020 Version 2020.1
Initial release.	N/A

The following table shows the revision history for Vitis HLS Migration Guide.

Section	Revision Summary
03/22/2021 Version 2020.2
Entire section	No changes to this section.
12/15/2020 Version 2020.2
Structs	Added important note
Pragmas	Minor updates
Deprecated and Unsupported Tcl Command Options	Minor updates
11/23/2020 Version 2020.2
Interface Bundle Rules	Updated sections
Interface Offset	Updated sections
Default User Control Settings	Updated section
Pragmas	Updated section
Top-Level Function Argument	Updated section
HLS Video Library	Updated section
C Arbitrary Precision Types	Updated section
Deprecated and Unsupported Tcl Command Options	Updated table
06/24/2020 Version 2020.1
General updates	Cleanup of figures and pagination
06/03/2020 Version 2020.1
Initial release.	N/A