Re: new cpu's for rs6000 target

[Daniel Berlin <dan at cgsoftware dot com>]

dalej@apple.com writes:

> Rs6000 specific.  This adds scheduling info for cpu's 7400 and 7450.
> It also changes two numbers for the 750 target:  the issue-delay of
> "imul" is changed to match the ready-delay (the instruction grabs the
> execute pipeline stage until it's done, so it's better to delay later
> conflicting instructions), and the ready-delay of "store" is changed
> to 2.  Both these match the documentation at
> //www.motorola.com/SPS/RISC/smartnetworks/arch/powerpc/doclib.htm
> and give good results in practice.
Could you quantify this?
Not that I disbelieve it, i'm just wondering if you actually tried
some performance tests.


-- 
"When I have a kid, I want to buy one of those strollers for
twins.  Then put the kid in and run around, looking frantic.
When he gets older, I'd tell him he used to have a brother, but
he didn't obey.
"-Steven Wright