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Re: powerpc & unaligned block moves with fp registers


> Date: Sat, 10 Nov 2001 18:04:27 +0100 (CET)
> From: degger@fhm.edu
> To: dewar@gnat.com
> Cc: kenner@vlsi1.ultra.nyu.edu, gcc@gcc.gnu.org

> Pessimistic or not, we should try to avoid misaligned accesses on any
> cost since they are in a lucky case at least magnitude slower.

I reject the notion that we should at any cost.  What if it costs are
10% on the SPEC2000 performance benchmark?  What if we are using -Os,
and it makes code 6% larger?  A good change, will be backed up by size
and time numbers from a variety of benchmarks.


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