- Underflow in gcc is handled much more slowly in gcc than icc.
- The solution is probably to take some ideas from projects like http://lipforge.ens-lyon.fr/www/crlibm/ and incorporate them into glibc.
- Currently glibc's libm is derived from IBM Ultimate Precision Math Library which preserves the precision perfectly but does so at an immense cost in certain circumstances.
- Red Hat Enterprise Linux 6
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