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Re: altivec: add vscr register
- From: Alex Rosenberg <alexr at spies dot com>
- To: Aldy Hernandez <aldyh at redhat dot com>, <dje at watson dot ibm dot com>, <gcc-patches at gcc dot gnu dot org>
- Date: Wed, 15 May 2002 00:21:28 -0700
- Subject: Re: altivec: add vscr register
on 5/14/02 11:41 PM, Aldy Hernandez at aldyh@redhat.com wrote:
> this patch explains to gcc all about VSCR, and adds it as a global
> register as well.
We found in MrC that modeling the VSCR paying attention to the sticky nature
of VSCR[SAT] made a huge difference in scheduling.
Also, this patch doesn't handle a change to the VSCR[NJ] bit -- many VFPU
instructions can't be moved past such a change.
+------------------------------------------------------------+
| Alexander M. Rosenberg <mailto:alexr@_spies.com> |
| Nobody cares what I say. Remove the underscore to mail me. |