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. |
#include “ap_int.h” |
| C++ | ap_[u]fixed<W,I,Q,O,N> | #include “ap_fixed.h” |
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.