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RE: 754R vs pow
In response to Mark Erle's note, Dave James wrote:
We would have to also exclude
* every rounded operation that could underflow (and round differently)
+++++++++++++++++++++
The latter is not an issue; the results (in default exception handling
mode) are identical in the two options. The only difference is whether
the Underflow flag is asserted.
* processing of sNaNs and qNans (that encode differently)
Here, the issue goes beyond encoding (which could be covered up
by explicit access functions, as Dave is about to propose): NaN
propagation would have to be standardised for multiple-operand
cases.
Michel.
Sent: 2007-06-01 20:23:22 UTC