[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CAPfzE3a1firnZq0mN=Psru8Csz0LGcJ+B2GuKej0QDfYJbCsJA@mail.gmail.com>
Date: Thu, 11 Jul 2013 08:34:03 +1200
From: Andre Renaud <andre@...ewatersys.com>
To: musl@...ts.openwall.com
Subject: Re: Thinking about release
>> What also might be worth testing is whether GCC can compete if you
>> just give it a naive loop (not the fancy pseudo-vectorized stuff
>> currently in musl) and good CFLAGS. I know on x86 I was able to beat
>> the fanciest asm strlen I could come up with simply by writing the
>> naive loop in C and unrolling it a lot.
>
>
> Duff's device!
That was exactly my first idea too, but interestingly it turns out not
to have really added any performance improvement. Looking at the
assembler, with -O3, gcc does a pretty good job of unrolling as it is.
Regards,
Andre
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
