I face a problem when trying to convert string to double numbers, when the
string represents a denormalized number.
I use g++ 4.2.2 on powerpc-ibm-aix5.3.0.0.
Example:
-------------
#include <vector>
#include <sstream>
#include <iostream>
int main() {
std::stringstream stream("5.6 0 0.205867 1.0809 7.22644 0.373206
-5.84675e-317 1.99995 0.00433641 1.45331e-45");
std::vector<double> vals;
double x;
while (stream >> x)
{
vals.push_back(x);
}
std::vector<double>::iterator it;
for (it=vals.begin(); it<vals.end(); it++) {
std::cout<<*it << " ";
}
return 0;
}
------------------
displays: 5.6 0 0.205867 1.0809 7.22644 0.373206
The denormalized number -5.84675e-317 is dropped and the loop ends.
Interestingly, if I use:
--------------
double x;
std::string st;
while (stream >> st) {
x = atof(st.c_str());
vals.push_back(x);
}
-------------
then that works, this displays: 5.6 0 0.205867 1.0809 7.22644 0.373206
-5.84675e-317 1.99995 0.00433641 1.45331e-45
I have seen there were some denormalized-related options for g++ on Alpha, but
they are not implemented on AIX. Moreover, I don't see this issue under
Linux/gcc 4.2.2.
--
Summary: Problem handling denormalized numbers under AIX
Product: gcc
Version: 4.2.2
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: efernandez at physiomics-plc dot com
GCC host triplet: powerpc-ibm-aix5.3.0.0
GCC target triplet: powerpc-ibm-aix5.3.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35397
