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Re: RFA: patch modifying ColdFire, power4, an power5 pipeline descriptions
- From: David Edelsohn <dje dot gcc at gmail dot com>
- To: Vladimir Makarov <vmakarov at redhat dot com>
- Cc: gcc-patches <gcc-patches at gcc dot gnu dot org>, Pat Haugen <pthaugen at us dot ibm dot com>
- Date: Tue, 31 Mar 2009 16:49:26 -0400
- Subject: Re: RFA: patch modifying ColdFire, power4, an power5 pipeline descriptions
Vlad,
If I understand correctly from you and Pat, your patch fixes a consistency
check that you are adding to the scheduler, but does not affect the current,
inaccurate behavior of the POWER4/5 machine description. As you found
and we found before, if the pipeline is described accurately, the automaton
is unreasonably large.
Assuming that you patches to power4.md and power5.md do not affect
the size and build times (by retaining the inaccurate behavior) and produce
the same instruction scheduling, the patch is okay.
Thanks, David