[squeak-dev] Using #= for integer comparison instead of #==

Levente Uzonyi leves at elte.hu
Wed Nov 17 00:21:02 UTC 2010

On Tue, 16 Nov 2010, Eliot Miranda wrote:

> Um, on Cog it sends a message if the method containing the #= has been
> jitted.  But the issue is /not/ whether there is a send or not.  The issue

Does it mean, that #= can't be used in "atomic" code anymore?


> is what the behaviour of the primitive code is.  In the interpreter #= will
> short-circuit (avoid the send) if both the receiver and the argument are
> either a SmallInteger or a Float.  In the JIT the primitive will not fail if
> the receiver and argument are both SmallIntegers or Floats or if the
> receiver is a Float and the argument is an Integer, but will fail if the
> receiver is a SmallInteger and the argument is a Float.


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