Subject: single-precision "expf" super slow on x86-64??

Miles Bader
Sun Apr 29 05:39:00 GMT 2012

[...resend, because gmane is being stupid...]

Paul Pluzhnikov <>
>> Hi, I've run into the following very odd behavior:
>> On my debian x86-64 system, the single-precision "expf" function seems
>> to be about six times _slower_ than the double-precision "exp"
>> function!
> This has very likely been fixed by

Was there previously an optimized version of "exp", but not "expf"
(since "exp" is already much faster)?



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