8. Release Notes¶

8.1. LegUp HLS EAP 2021.1 Release Notes¶

Release date: April 23, 2021

8.1.1. Software Features and Enhancements¶

Full support for complex software testbenches.

Automatically trigger re-compilation if needed to generate the software binary or Verilog when the C++ source code, Makefile, or TCL config files changed.

Added limited SW/HW Co-Simulation support for multi-threading when all threads are joined in the function where the threads are forked.

Added support for user-specified arguments of the main() function in software testbench.

Added AP_RND_ZERO quantization mode to the ap_fixpt C++ library.

Added a range() method to ap_int and ap_fixpt C++ libraries.

Added a simulation with waves feature to LegUp IDE for custom testbench.

8.1.2. Resolved Issues¶

The following defects and enhancement requests were resolved:

HLS-59: RTL Interface: fix memory port names

HLS-174: Spaces in LegUp workspace path makes synthesis fail. Add user error message to avoid spaces.

HLS-177: Change the header files on Windows

HLS-199: Add documentation comment to LegUp Library classes like ap_int similar to ap_fixpt so the user can mouse over the type in Eclipse and get the usage information

HLS-225: create_hdl_plus.tcl does not properly import mem_init files

HLS-232: Update windows installer link to LegUp getting started guide

HLS-255: After project import LegUp IDE does not save HLS constraints changes when closing

HLS-269: Missing legup_array_depth=1 for struct pass-in-by-reference

HLS-277: Automatically add array-depth attribute to pass-in-by-value structs.

HLS-278: Hardware functions are incorrectly removed by PreprocessThreadLib pass

HLS-279: Interface Report: Struct type IORam is incorrectly considered as scalar memory

HLS-280: Interface Report: byte-enable signal is not properly recognized for non-struct yet byte-enabled RAMs

8.2. LegUp HLS EAP 9.2.1 Release Notes¶

Release date: March 3, 2021

8.2.1. Software Features and Enhancements¶

Added support for new legup::thread multi-threading API (see Multi-threading with LegUp Threads)

8.2.2. Resolved Issues¶

The following defects and enhancement requests were resolved:

HLS-42: Libero 12.6 complains about set_option -rom_map_logic.

HLS-50: Sobel tutorial part 3 to match the syntax as part 1 & 2.

HLS-59: Fix the memory port names to a more understandable convention.

HLS-60: Give a proper error when there are multiple top-level functions specified.

HLS-63: Sefault if the top-level function pragma is removed from Sobel tutorial part 1.

HLS-78: Loop pipeline support for variable loop bounds.

HLS-97: Fmax improvements for customer design.

HLS-121: Cannot access AXI4 slave without starting the accelerator (in concurrent_access mode).

HLS-129: Loop unrolling crashes some designs.

HLS-142: Running Libero synthesis, P&R from LegUp will fail with Libero 12.5 or before on Windows.

HLS-149: LLVM’s loop-unswitch performs an unwanted loop replication.

HLS-156: CoSim: wrong values for ap_uint type being fed to the DUT.

HLS-162: Verilog name conflict in generated Verilog between a RAM instance and a register.

HLS-164: Cannot expand grouped AXI4stream ports in SmartDesign for HDL+ block.

HLS-165: Some memory interfaces are not showing in the interface report.

HLS-168: Clang errors out with none type memory partition pragma.

HLS-200: Can’t set multiply latency when split mult is enabled.

HLS-201: Execute create_hdl_plus.tcl from Libero got LEGUP_ROOT_DIR not set error.

HLS-203: ScheduleViewer does not work when LegUp installation and workspace are in different drives.

HLS-206: Red-line in Eclipse complaining about legup::thread/ref.

8.3. LegUp HLS EAP 9.1 Release Notes¶

Release date: Jan 4, 2021

8.3.1. Software Features and Enhancements¶

Only support targeting Microchip PolarFire FPGAs

Support for Libero 12.6

Libero SmartDesign integration (see Instantiating LegUp IP Core in Libero SmartDesign)

Added support for pragmas (see LegUp Pragmas Manual) in the source code to specify LegUp user constraints instead of using Tcl commands.

Support for math.h functions (see C Numerics Library (math.h in C / <cmath> in C++))

Documentation of top-level RTL interfaces (see Top-Level RTL Interface)

Improvements to memory partitioning (see Memory Partitioning)

Added Microchip software end-user license agreement (EULA)

8.3.2. Resolved Issues¶

The following defects and enhancement requests were resolved:

Synthesize with Libero block flow to avoid limited number of top-level I/O pins

Fixes for RAM initialization and reset logic

Fix LegUp IDE cancel button on Windows

Fix Libero FMax parsing

Better error messages for unsupported C++ features (vector, map, etc.) and unsupported co-simulation cases