Arbitrary Integer Precision Types with C++ - 2021.1 English

The header file ap_int.h defines the arbitrary precision integer data type for the C++ ap_[u]int data types. To use arbitrary precision integer data types in a C++ function:

• Add header file ap_int.h to the source code.
• Change the bit types to ap_int<N> for signed types or ap_uint<N> for unsigned types, where N is a bit-size from 1 to 1024.

The following example shows how the header file is added and two variables implemented to use 9-bit integer and 10-bit unsigned integer types:

#include "ap_int.h"

void foo_top (…) {
  
 ap_int<9>  var1;           // 9-bit
 ap_uint<10>  var2;         // 10-bit unsigned