* Using lswi/stswi inside the kernel @ 2005-07-14 12:52 Frank van Maarseveen 2005-07-14 13:24 ` Kumar Gala 0 siblings, 1 reply; 3+ messages in thread From: Frank van Maarseveen @ 2005-07-14 12:52 UTC (permalink / raw) To: linuxppc-dev Are there any issues I should be aware of? I think most SAVE_GPR* and REST_GPR* macros could be replaced by a single lswi/stswi instruction. -- Frank ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Using lswi/stswi inside the kernel 2005-07-14 12:52 Using lswi/stswi inside the kernel Frank van Maarseveen @ 2005-07-14 13:24 ` Kumar Gala 2005-07-14 20:48 ` Segher Boessenkool 0 siblings, 1 reply; 3+ messages in thread From: Kumar Gala @ 2005-07-14 13:24 UTC (permalink / raw) To: Frank van Maarseveen; +Cc: linuxppc-dev Yes, not all PowerPC implementations actually implement this instructions. Also, on a number of them there is no performance improvement when using the instructions. - kumar On Jul 14, 2005, at 7:52 AM, Frank van Maarseveen wrote: > Are there any issues I should be aware of? > > I think most SAVE_GPR* and REST_GPR* macros could be replaced by a > single lswi/stswi instruction. > > -- > Frank > _______________________________________________ > Linuxppc-dev mailing list > Linuxppc-dev@ozlabs•org > https://ozlabs.org/mailman/listinfo/linuxppc-dev > ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Using lswi/stswi inside the kernel 2005-07-14 13:24 ` Kumar Gala @ 2005-07-14 20:48 ` Segher Boessenkool 0 siblings, 0 replies; 3+ messages in thread From: Segher Boessenkool @ 2005-07-14 20:48 UTC (permalink / raw) To: Kumar Gala; +Cc: linuxppc-dev > Yes, not all PowerPC implementations actually implement this > instructions. Also, on a number of them there is no performance > improvement when using the instructions. Read: severe performance degradation ;-) Segher ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2005-07-14 20:47 UTC | newest] Thread overview: 3+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2005-07-14 12:52 Using lswi/stswi inside the kernel Frank van Maarseveen 2005-07-14 13:24 ` Kumar Gala 2005-07-14 20:48 ` Segher Boessenkool
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox