Messages in this thread | | | Subject | Re: [PATCH v2 22/25] powerpc32: move xxxxx_dcache_range() functions inline | From | Christophe Leroy <> | Date | Wed, 23 Sep 2015 00:49:43 +0200 |
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Le 23/09/2015 00:34, Scott Wood a écrit : > On Tue, 2015-09-22 at 22:57 +0200, Christophe Leroy wrote: >> >Here is what I get in asm. First one is with "if (i) mb();". We see gcc >> >puts a beqlr. This is the form that is closest to what we had in the >> >former misc_32.S >> >Second one if with "mb()". Here we get a branch to sync for a useless sync > I was more concerned with keeping the code simple than the asm output. > Right, but is that so complicated to say: if we did nothing in the loop, no need to sync ?
Christophe
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