[Bug libfortran/30694] minval/maxval with +/-Inf

[fxcoudert at gcc dot gnu dot org]

------- Comment #25 from fxcoudert at gcc dot gnu dot org  2007-10-18 07:38 -------
(In reply to comment #24)
> So maybe approach the question differently.  Which element in an array of NaNs
> is the smallest one and what is its value?  If I pick any one element, its
> "value" is NaN.  It does not matter which one I select, its "value" always
> comes out NaN.

I understand your argument, but there are other arguments that are, I think, at
least equally valid and convincing. As I said, MINVAL basically ignores NaNs,
so an array containing only NaNs is equivalent to an empty array: its MINVAL is
+Huge. Note that having MINVAL = +Huge is, in itself, a telltale sign that
something is wrong, if there is no mask present.

Now, I have another question: what happens for mixed NaNs? For example, in your
scheme, what would be the value of MAXVAL((/sNaN, qNaN/))?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30694