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Date: Mon, 28 Apr 2014 20:56:58 -0400
From: Rich Felker <dalias@...c.org>
To: musl@...ts.openwall.com
Subject: Re: thumb2 support
On Tue, Apr 29, 2014 at 12:52:36AM +0100, Stephen Thomas wrote:
> I remember that the old thumb didn't support the conditional
> instructions and was quite slow. I only care about thumb2 and am
> currently using gcc, so I attach a patch for the thumb that will
The code here is only used on armv6/v7. Do any such chips lack thumb2?
If there's any doubt, we could look at what gcc generates for the
__sync_* builtins in thumb mode.
> only work for gcc .
Why is it only for gcc?
> I think that gcc builds two versions of atomic
What do you mean by this?
> so the ugly #define was needed. I cannot remember what rvct/rvds or
> whatever it is branded as these days uses, but from memory old
> versions didn't support the gnu assebmly syntax.
All asm in musl is gas syntax so this is nothing new.
Rich
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