Re: [f-cpu] the wrong way (or not?) concerning FP

[Juergen Goeritz <goeritz@oekomm.de>]

On Mon, 27 Aug 2001, nicO wrote:

> An other trick could be used : It's to implement the full set of
> instruction but when a none present instruction is decoded a specific
> execption is raised and a specific code is runned. This code could be a
> part of the fcpu and not from a compiler. So you keep the complete
> compatibility. That's what has been proposed a long time ago.

Ain't that some kind of microcode then?
-> That means it has to be coded -> developed

It's better to just have the exception but no built-in
code. Emulation per software (e.g. it's also implemented
in LEON this way) is preferable BUT introduces additional
overhead.

JG

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