On Mon, Jan 13, 2020 at 10:57 PM Fabio Niephaus <lists at fniephaus.com> wrote:
>
> Hi Eliot,
>
> If you believe plugins would benefit from these three classes, please
> go ahead. There's not too much space left in the current
> specialObjectsArray, but while we're talking about it: may I propose
> to add SmallFloat64 at index 12 ("was BlockContext"). Or how does Cog
> find/use this class in 64-bit images?

Just had a look and it looks like Cog relies on the class to be at a
fixed index in classTableFirstPage:

classSmallFloat
  <api>
  ^self fetchPointer: self smallFloatTag ofObject: classTableFirstPage

Not sure this is a clean solution?

>
> newArray at: 10 put: BoxedFloat64.
> ...
> newArray at: 12 put: SmallFloat64. "was BlockContext."
>
>
> Fabio
>
> On Mon, Jan 13, 2020 at 8:22 PM tim Rowledge <tim at rowledge.org> wrote:
> >
> > Speaking from my magnificent golden embossed throne in the Great Hall of our bigly cathedral, I say unto you "go for it my son, and may you have success"
> >
> >
> > > On 2020-01-13, at 9:47 AM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> > >
> > > Hi All,
> > >
> > >     currently the following slots in the specialObjectsArray are unused in both Squeak and Pharo (& I suspect Cuis).
> > >
> > >       newArray at: 32 put: nil. "was the prototype Float"
> > >       newArray at: 33 put: nil. "was the prototype 4-byte LargePositiveInteger"
> > >       newArray at: 34 put: nil. "was the prototype Point"
> > >
> > > The specialObjectsArray already contains ByteArray
> > >       newArray at: 27 put: ByteArray.
> > >
> > > I would like to have a full set of little-endian unsigned integer arrays.  In Spur Squeak these are ByteArray, DoubleByteArray, WordArray (Bitmap is big endian), and DoubleWordArray.  The VM's at:[put:] directly supports these four at the JIT level giving us efficient unsigned access.  There is also efficient signed access for some signed arrays but these are less useful (at least in theVM simulator).
> > >
> > > I want to make all four unsigned integer array classs available to plugins etc via the interpreterProxy.  So here's a formal request to reserve these values for use as follows:
> > >       newArray at: 27 put: ByteArray.
> > > ...
> > >       newArray at: 32 put: DoubleByteArray.
> > >       newArray at: 33 put: WordArray.
> > >       newArray at: 34 put: DoubleWordArray.
> > >
> > > _,,,^..^,,,_
> > > best, Eliot
> > >
> > >
> >
> >
> > tim
> > --
> > tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
> > Fractured Idiom:- LE ROI EST MORT. JIVE LE ROI - The King is dead.  No kidding.
> >
> >
> >