Date: Sun, 18 Jun 2017 21:09:35 +0200 From: Szabolcs Nagy <nsz@...t70.net> To: musl@...ts.openwall.com Subject: Re: [PATCH] fix arm run-time abi string functions * Alexander Monakov <amonakov@...ras.ru> [2017-06-18 22:05:59 +0300]: > On Sun, 18 Jun 2017, Szabolcs Nagy wrote: > > > here it's possible to hoist and deduplicate 'cmp r2, #0; bxeq lr' by placing it > > > prior to the direction check. > > > > > > > i dont think there is a difference > > (either way, both functions need to do this cmp once, > > the executed insns are the same you just changed the > > ordering a bit) > > I was pointing that out as a size optimization, but depending on alignment > of the following code it might be pointless indeed. > i dont think the size changes, only the order of instructions
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