#include <iostream>
#include <cstdint>
/*
Combine two uint32_t values into one uint64_t.
The usual pattern:
uint64_t result = ( (uint64_t)high << 32 ) | low;
- The high 32 bits are shifted left by 32 positions.
- The low 32 bits are OR'ed in.
*/
// Function that combines two 32-bit integers into a 64-bit integer
uint64_t combine_two_32bit(uint32_t high, uint32_t low) {
// Cast 'high' to uint64_t to avoid overflow before shifting
uint64_t result = ( (uint64_t)high << 32 ) | low;
return result;
}
// Function that prints a uint64_t in hex with leading zeros
void print_hex64(uint64_t value) {
std::cout << "0x"
<< std::hex
<< std::uppercase
<< value
<< std::dec
<< std::endl;
}
int main() {
uint32_t high = 0x11223344; // Example high 32 bits
uint32_t low = 0x55667788; // Example low 32 bits
uint64_t combined = combine_two_32bit(high, low);
std::cout << "High 32 bits: 0x" << std::hex << high << std::endl;
std::cout << "Low 32 bits: 0x" << std::hex << low << std::endl;
std::cout << "Combined 64-bit value: ";
print_hex64(combined);
}
/*
run:
High 32 bits: 0x11223344
Low 32 bits: 0x55667788
Combined 64-bit value: 0x1122334455667788
*/
