what are __ieee754_exp2l/__ieee754_log2l for?

[Andreas Schwab]

David Mosberger <davidm@napali.hpl.hp.com> writes:

> On a completely unrelated note, can somebody tell me what the routines
> mentioned in $SUBJECT are for?  What are they're supposed to do and
> what are they needed for?

They are the core of the C99 exp2l and log2l functions, resp.  Nobody has
yet written generic implementations of them for 80-bit extended float.
Currently only x86, m68k and x86-64 specific versions exist, and a 128-bit
extended float version of log2l.  Search for e_exp2l.* and e_log2l.* in
the sysdeps hierarchy for the existing implementations.

> I'm asking since on ia64 "make check" keeps failing with:
>
> __ieee754_exp2l not implemented
> __ieee754_log2l not implemented

It's not failing because of this.  When a math funtion is not implemented
it is just skipped by the tests.  Actually, all math tests are working
fine here.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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