[Vm-dev] Integer comparition primitive failures on Cog

[Henrik Sperre Johansen]

As per my comment on the recent Morphic performance 
graphs,(http://blog.openinworld.com/2011/03/morphic-flavour-performance/#comment-59) 
on a Cog VM these primitives fail with a Float parameter, which leads to 
a huge performance hit when comparing Ints to Floats by doing silly 
things in the fallback code.

Cog:
[1 to: 2000000 do: [:i |
     i < 2354.234.
     i <= 2354.234.
     i >= 2354.234.
      i > 2354.234.]] timeToRun 26594

Trunk:
[1 to: 2000000 do: [:i |
     i < 2354.234.
     i <= 2354.234.
     i >= 2354.234.
      i > 2354.234.]] timeToRun 229

Should this be changed in the VM, or is the difference for pure int/int 
comparition large enough that we should instead change
Float>>adaptToInteger: andCompare:
to use the corresponding comparitions with Float as receiver, which does 
work?
That's still slower than trunk in my image, but quite a bit better, 
above test takes about 1s.

Cheers,
Henry