[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Stds-754] Motion: Delete 5.3.2 Scaled-product operation



July agenda item #18 is revised as follows:

<b>Agenda item #18</b>

Date: Mon Jun 26 10:17:21 PDT 2006
From: David Hough

Motion: Delete 5.3.2 Scaled-product operation; add A.3. Scaled-product 
operations

Rationale:
The current specification is too limited to be worth standardizing.
Actual applications are just as likely to need over/underflow
protection for products of sums and differences.     And the array
versions would not likely be implemented upon a primitive with the prescribed
semantics (a more probable implementation primitive would return zero sf if
no over/underflow intervenes).    Since the whole point is performance,
the user feature (acting on arrays) would be implemented upon a performant
primitive.
 
So restore the actual user feature to annex A, which is where it came from
originally, as a means of avoiding specifying counting mode.
 
Text:
Delete 5.3.2 Scaled-product operation from the 754R draft.
Add A.3. Scaled-product operations by copying 5.3.2 Scaled-product operations
from http://754r-c.ucbtest.org/motions/archive/chapter5.pdf

754 | revision | FAQ | references | list archive