C Arbitrary Precision Types - 2022.2 English

Vitis High-Level Synthesis User Guide (UG1399)

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2022.2 English

Vitis HLS does not support C arbitrary precision types. Xilinx recommends using C++ types with arbitrary precision.

In addition, C++ arbitrary precision types in Vitis HLS are limited to a maximum width of 4096 bits, instead of 32K bits supported by Vivado HLS.

C Constructs

  • Pointer cast are not supported.
  • Virtual functions are not supported.