Date: Thu, 26 Apr 2001 22:09:32 -0400 From: Sergey Babkin <babkin@bellatlantic.net> To: "Michael C . Wu" <keichii@peorth.iteration.net> Cc: Jeremiah Gowdy <jgowdy@home.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: x86-64 Hammer and IA64 Itainium Message-ID: <3AE8D4DC.E0E35042@bellatlantic.net> References: <200104171836.LAA06378@akira.lanfear.com> <000001c0c777$f9529b30$215778d8@cx443070b> <20010426175906.B88522@peorth.iteration.net>
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"Michael C . Wu" wrote: > > With the branch prediction, cache tracing, and EPIC instructions, > you really want to use an ILP compiler. Without a compiler that > can decide on good ways to output binaries that run with all the IA-64 > innovations^Wreinvention-of-the-wheels. Anothing interesting point is that the optimisation for IA-64 seems to be highly processor-specific: the code optimized for Itanium won't be optimal for McKinley and vice versa. I've heard an estimation of about 1.5 times speed increase due to the model-specific optimisation. -SB To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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