Vitis HLS provides arbitrary precision integer data types that manage the value of the integer numbers within the boundaries of the specified width, as shown in the following table.
|Language||Integer Data Type||Required Header|
|C++||ap_[u]int<W> (1024 bits)
Can be extended to 4K bits wide as explained in C++ Arbitrary Precision Integer Types.
The header files define the arbitrary precision types are also provided with Vitis HLS as a standalone package with the rights to use them in your own source code. The package, xilinx_hls_lib_<release_number>.tgz, is provided in the include directory in the Vitis HLS installation area.