Found a bug in libm.so.6 in centos7.9.2009 image

[aqluheng]

When I run this code on a CentOS 7 image, I get an incorrect result.

#include <iostream>
#include <cmath>
#include <iomanip>

int main() {
    long double num1 = 20010999999.9999990905052982270717621L;
    std::cout << std::fixed  << std::setprecision(20) << "std::round(" << num1 << ") = " << std::round(num1) << std::endl;

    return 0;
}
// (centos7): std::round(20010999999.99999909050529822707) = 20010999999.999999090505298227

I found that this task should be associated with the roundl function in libm.so.6. After modifying this function as follows, the code runs correctly.

-cmp     w19, #0x1e
+cmp     w19, #0x2f

Could this modification be incorporated into the CentOS 7.9 image?