dynamic vs. static rounding

[Conor O'Neill]

tangaantares.mcs.anl.gov writes:
>All supports of IEEE rounding controls (on current machines) that
>I know of is dynamic. That is, the machine instructions round
>according to a control word that can be changed in runtime.

The INMOS IMS T800 transputer has _static_ control of rounding modes.
In effect, the rounding mode is part of the opcode.
It would be fairly expensive to implement dynamic rounding modes
on the T800 and its derivatives.

---
Conor O'Neill, Software Group, INMOS Ltd., UK.
UK: conorainmos.co.uk		US: conorainmos.com
"It's state-of-the-art" "But it doesn't work!" "That is the state-of-the-art".