From: Eric Wong <normalperson@...>
Date: 2014-09-12T02:59:48+00:00
Subject: [ruby-core:64985] Re: [ruby-trunk - Bug #10232] [Open] Trivial change of IMMEDIATE VALUE bits layout

ko1@atdot.net wrote:
> (1) can be incompatibility issue so that I don't propose this fix strongly.
> Interpreter core doesn't depends on this spec, but C-exts can be affected.

I think the only thing I've seen C-exts depend on is Qfalse == 0
(which this preserves)

> Strange thing is: vm1_const

I suspect this is CPU-specific behaviors.  I cannot see the difference
on my AMD FX-8320 (on vm1_const, haven't tested others)