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[Bug math/22227] expm1f gives inaccurate results


https://sourceware.org/bugzilla/show_bug.cgi?id=22227

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
Having a result that is not correctly rounded is not a bug (please see the 
documented accuracy goals in the glibc manual), and tests involving random 
inputs are not suitable for bug reports.

If there is a particular input for which expm1f produces a result with an 
error of more than a few ulps, please specify the exact input (as a hex 
float constant) that gives the largest error you observed, stating the 
expected result and the actual result you observe, as hex floats.

If the error is more than 1ulp from the correctly rounded result, that 
input could then be added to auto-libm-test-in so the libm-test-ulps files 
become more accurate.  It would need to be several ulp to consider there 
to possibly be a bug.

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