Daily Commit Log

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours:

http://lists.squeakfoundation.org/pipermail/packages/2014-March/006981.html

Name: Kernel-nice.843
Ancestors: Kernel-nice.842

Correct the bug I introduced for large integer sqrtFloor.

If receiver was of the form 2^2n*u
we did answer 2^n *E(sqrt(u))

But sqrt(u) = E(sqrt(u)) + residue
where 0<=residue&lt;1
And result is rather
        E(2^n*sqrt(u))
        = E( 2^n*(E(sqrt(u)) + residue))
        = 2^n*E(sqrt(u)) + E(2^n*residue)

As 2^n * residue can be big (superior to 1), we miss the correct value by default.

If we want to correct this, an approximation of residue is (u-E(sqrt(u))^2) / 2 E(sqrt(u))
This is more or less like super Newton-Raphson inner loop...
It would be possible to duplicate super work, but I feel like it's adding too much complexity for small reward, so I prefer to remove offending code for now

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http://lists.squeakfoundation.org/pipermail/packages/2014-March/006982.html

Name: KernelTests-nice.264
Ancestors: KernelTests-nice.263

A non regression test for just found sqrtFloor bug.

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