Output of C Synthesis - 2023.2 English

Vitis High-Level Synthesis User Guide (UG1399)

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2023.2 English

In the Vitis unified IDE the hierarchy of the HLS component is structured as follows: <workspace>/<component>/<component>/hls/. You can select the HLS component in the Vitis Component Explorer and select Open In Terminal from the right-click menu to explore the contents of the component folders.

When synthesis completes, the syn folder is created inside the <component>/hls folder. This folder contains the following elements:

  • The verilog and vhdl folders contain the output RTL files.
    • The top-level file has the same name as the top-level function for synthesis.
    • There is one RTL file created for each sub-function that has not been inlined into a higher level function.
    • There could be additional RTL files to implement sub-blocks of the RTL hierarchy, such as block RAM, and pipelined multipliers.
  • The report folder contains a report file for the top-level function and one for every sub-function that has not been in-lined into a higher level function by the HLS compiler. The report for the top-level function provides details on the entire design.
Important: Do not directly use the RTL files generated in the syn/verilog or syn/vhdl folder for synthesis in the Vivado tool. Instead you must use the exported output files generated by the package process as described in Packaging the RTL Design. The HLS compiler sometimes uses IP from the Vivado IP catalog in the synthesized RTL code, such as with floating point designs, and the verilog and vhdl folders will not contain the complete design.