[fpc-devel] [patch] ucomplex cln() bug
jimis at gmx.net
Tue Nov 7 23:46:19 CET 2006
Florian Klaempfl wrote:
> Dimitrios Apostolou schrieb:
>> On Friday 04 August 2006 07:58, Dimitrios Apostolou wrote:
>>> OK, I conclude. My symptoms are:
>> I forgot to mention here that z=0
>>> z**3-2= NanNani
>>> z*z*z-2= -2.000000000000000E+000
>>> After digging a bit I realized that this is not a problem of
>>> uComplex, but
>>> a problem of math unit. In particular exp(-Inf) returns NaN, where it
>>> should return 0.
>> Hasn't anybody else the same problem? Who wrote the initial
>> implementation for fpc_exp_real?
> Which one :)? E.g. which platform?
>>> Unfortunately I got really lost when studying the fpc_exp_real
>>> implementation, and when I saw that the actually used version
>>> is in assembly I just gave up!
yes, i386. Sorry for not mentioning it.
>>> Any ideas of how it can be fixed?
>>> Thanks in advance,
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