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Branch hints on P4 and EM64T
- From: "H. J. Lu" <hjl at lucon dot org>
- To: Jan Beulich <JBeulich at novell dot com>
- Cc: binutils at sources dot redhat dot com, gcc at gcc dot gnu dot org
- Date: Fri, 23 Jul 2004 07:31:51 -0700
- Subject: Branch hints on P4 and EM64T
- References: <s1012dc2.020@emea1-mh.id2.novell.com>
On Fri, Jul 23, 2004 at 04:25:24PM +0200, Jan Beulich wrote:
> It should then be gcc that gets fixed. And I can't see why it used this
I was told that branch hints might not be useful at all. Icc never used
it in production. It was thought that it might be useful before chip
was made. But it didn't turn out that way.
> odd mechanism in the first place. Also, as I saw Jakub Jelinek also
> disagreed with your reverting of my original change. Jan
Gcc should be modified. But it doesn't mean that the new assembler
should break existing gcc just because it looks odd. Please show me
how it can cause problems on x86-64.
H.J.