Von: Ben Reser [mailto:ben_at_reser.org]
> On Thu, May 16, 2013 at 2:27 PM, Branko Čibej <brane_at_wandisco.com> wrote:
> > On 16.05.2013 23:12, Mattias Engdegård wrote:
> >> [[[
> >> * subversion/include/svn_types.h:
> >> Set SVN_UNALIGNED_ACCESS_IS_OK for PowerPC.
> >> ]]]
> > At first I thought, "that can't be right!" but it turns out that it is
> > ... somewhat. Only if we're sure that we use that macro for integer
> > access only. Which should be the case.
> Added documentation that this is for integer access and audited the existing
> uses of this macro, it's all integer accesses.
Hmm, when checking those places, I'm not sure whether modern compilers
with their auto-vectorizing optimizers really profit from the hand-optimized
code there, or whether that code might rather trouble the optimizer into
generating suboptimal code.
> For anyone that's interested on the PowerPC details see:
CODESYS® a trademark of 3S-Smart Software Solutions GmbH
Inspiring Automation Solutions
3S-Smart Software Solutions GmbH
Dipl.-Inf. Markus Schaber | Product Development Core Technology
Memminger Str. 151 | 87439 Kempten | Germany
Tel. +49-831-54031-979 | Fax +49-831-54031-50
E-Mail: email@example.com | Web: http://www.codesys.com | CODESYS store: http://store.codesys.com
CODESYS forum: http://forum.codesys.com
Managing Directors: Dipl.Inf. Dieter Hess, Dipl.Inf. Manfred Werner | Trade register: Kempten HRB 6186 | Tax ID No.: DE 167014915
Received on 2013-05-22 09:59:19 CEST