The following table specifies differences between this release and prior releases that impact behavior or flow when migrating.
| Area | Behavior |
|---|---|
| Vitis HLS 1 | The Git Repository used to be accessible from the left hand lower quadrant. It has moved to the Console area. |
| The Analysis perspective no longer exists. The reports and views are now accessible from the Synthesis layout. | |
Pragma HLS SHARED was previously a standalone
pragma. It is now specified in the pragma
HLS STREAM type= option.
|
|
The default setting of config_interface -m_axi_offset for
the Vivado IP flow has changed
to slave. This means that when an m_axi interface is added to a Vivado IP an s_axilite interface is also added and
the offset is managed through it. |
|
Floating point accumulators and MAC offer new
precision for greater control through the config_op command. To replicate 2020.2 results in
2021.1, use the following command:
|
|
| Vitis profile | In the xrt.ini file, profile=true has been changed to opencl_summary=true
and
opencl_device_counter=true to
capture kernel-side data. These options can be specified separately
or together. |
| Vitis timeline | All trace results (opencl_trace=true, data_transfer_trace=true, stall_trace=all, and others) are added to the are
added to the Application Timeline in Vitis analyzer. You can specify which elements are
added to the Application Timeline when viewing the report. |
timeline_trace is changed to opencl_trace. |
|
| Vitis debug | GDB kernel debug during hardware emulation is no longer supported. |
| Vitis AI Engine | The default optimization level has changed from
xlopt=0 in 2020.2 to xlopt=1 in 2021.1. |
Using the -aie-sim-options of launch_hw_emu.sh, you can profile AI Engines with AIE_PROFILE enabled through a text
file. |
|
Changes to x86simulator: packet switching construct support, GDB
debugging, and printf() macros
have been added. |
|
XRT native C++ API for controlling the graph
(xrt::graph) has been
added. |
|
| Hardware Emulation support is now provided for designs accessing GMIO. | |
| Support for PL kernels in the ADF graph is deprecated. | |
|
|