Proposed changes to io.h

[Dan Malek]

Matt Porter wrote:

 > ..... Yes, it's ugly, but hardware folks keep
> configuring devices for a 64-bit bus width.

We have to ensure we don't try to execute these functions on
processors that don't have FPUs.  I think all processors with
64-bit data bus have FPUs, so that may reduce the problem
just by being lucky.

Thanks.


	-- Dan


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