heads up new sub-port e500 v2

[Geoff Keating]

On 19/10/2004, at 3:13 PM, Aldy Hernandez wrote:

> Stage 3 is open to new ports that do not add extra functionality.  As
> such, I will be adding support for a new variant of the e500.

Although it's open for new entire chip ports, ports that affect an 
existing machine description (like, say, the rs6000 one), are not 
automatically acceptable.  It would depend on how likely the changes 
are to break the current functionality.

(For example, new patterns that require TARGET_E500V2 are fine.  Adding 
"&& ! TARGET_E500V2" to existing patterns is fine.  A complete new 
scheduling description is probably fine.  Changing the rs6000 move 
expander is not so fine.)
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