On Tue, 2012-09-11 at 11:40 -0700, Khem Raj wrote: > On Tue, Sep 11, 2012 at 9:13 AM, Koen Kooi <k...@dominion.thruhere.net> wrote: > > From a gcc point of view both are the same ISA, but using xscale will take > > in account the absurdly long pipeline on that SoC. > > Not really, when you tune for XScale it will use ldrd/strd and pld if possible
Are you sure? As far as I remember, the only effects of -mtune=xscale are to alter some minor pipeline-related tradeoffs in code generation. In particular, LDM is especially slow on xscale so it is usually best avoided unless loading very large numbers of registers. I can't think of any reason why pld would be any more beneficial on xscale than generic v5TE, and I don't think gcc does anything special with it in that regard. p. _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-core
