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Date: Fri, 7 Apr 2017 18:55:33 +0100
From: Jon Chesterfield <>
Subject: Re: byteswap.h

Have you tested whether the intrinsics improve codegen on a recent
compiler? There's a good chance they make the code non-portable while
generating the same asm.


On 7 Apr 2017 18:53, "fab10" <> wrote:

I had a look at byteswap.h and it seems to me that the code is not very
efficient. Every function in this header could be translated in a single
assembly instruction with the gcc intrinsics:


Is there a reason to not use these gcc intrinsics?


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