As the perpetrator of the aforementioned perl, we have a standard set of perl binaries across each os/arch, and as the lowest spec machine we have in service is a PII everything still gets -march=pentium2. The -ffast-math was probably a little over enthusiastic. Amusingly enough checking an alpha box shows it gets compiled with -mieee which ensure it has (slower) IEE 754 compliant behaviour, and so does not show this up. Needless to say our perl binaries are now !-ffast-math ...

In reply to Re^3: Insights sought into floating point division strangeness by abs0
in thread Insights sought into floating point division strangeness by EvdB

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