lkml.org 
[lkml]   [1997]   [Jan]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subjectjump/alignment considerations
Date
Hi,

>
> on the other hand, doing an
>
> jg over
> jmp __down_failed
> over:

Be careful. The Pentium (and, I guess Pro), branch prediction is
not clean as it should be.
I don't have the references at hand, but I remember reading about
the above jump construct. Something about consecutive jumps sharing
the same BTB entry, and causing mis-applying BTB entries.

Regards,

markhe

\
 
 \ /
  Last update: 2005-03-22 13:38    [W:0.038 / U:1.920 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site