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Message-ID: <CAOUYtQBkzysRAVn8K1MFm2hfYrv6DJmYQWuHGhnkprGBswf-4A@mail.gmail.com>
Date: Fri, 7 Apr 2017 18:55:33 +0100
From: Jon Chesterfield <jonathanchesterfield@...il.com>
To: musl@...ts.openwall.com
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.
Jon
On 7 Apr 2017 18:53, "fab10" <0xfab10@...il.com> 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:
__builtin_bswap16
__builtin_bswap32
__builtin_bswap64
Is there a reason to not use these gcc intrinsics?
Bye
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