[Webkit-unassigned] [Bug 112239] LLint uses SSE2 instructions

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Apr 1 14:13:39 PDT 2013


--- Comment #10 from Allan Sandfeld Jensen <allan.jensen at digia.com>  2013-04-01 14:11:50 PST ---
(In reply to comment #9)
> If you want performance, then let's do it right.  There's nothing fundamentally blocking x87 support in the LLInt.

I don't really care about performance on these old machines. The problem is that on Linux many distributions have a policy of supporting architectures as far back as i686 (or even i486 in extreme cases). So if we use a solution that forces the switch on compile time (like cloop) it would force the distributions to compile all x86 with this switch and also slow down more modern x86 processors. Anything on runtime would be fine as long as it only hurts the slow machines. Though it would be good if it is at least as fast as the old interpreter which is what we should avoid regression compared to.

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