[Cfp-interest] Reduction functions, NaNs, exceptions

[Fred J. Tydeman]

On Wed, 25 Jul 2018 11:24:55 -0500 Rajan Bhakta wrote:
>
>    Fred: Look into reduction functions and NaN's for optional exceptions.

The 754 group agrees that exceptions are optional (may happen) 
if one of the operands is a NaN.
That is, exceptions are not required, nor are they prohibited.

So, sum( [+inf, -inf, NaN], 3)  is allowed to raise invalid for inf-inf,
but is not required to.  

However, our 18661 spec requires that invalid be raised.

---
Fred J. Tydeman        Tydeman Consulting
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