[squeak-dev] [Vm-dev] Reserving/allocating some slots in the specialObjectsArray for DoubleByteArray, WordArray and DoubleWordArray

Juan Vuletich JuanVuletich at zoho.com
Wed Jan 15 13:40:08 UTC 2020


Hi Folks,

Cuis already includes Float64Array in the base image. As usual, feel 
free to take the code to your preferred dialect. Primitives such those 
for FloatArray would be a welcome addition!

Cheers,

-- 
Juan Vuletich
www.cuis-smalltalk.org
https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev
https://github.com/jvuletich
https://www.linkedin.com/in/juan-vuletich-75611b3
@JuanVuletich


On 1/13/2020 8:24 PM, Eliot Miranda wrote:
>
> Hi Levente,
>
> On Mon, Jan 13, 2020 at 2:21 PM Levente Uzonyi <leves at caesar.elte.hu 
> <mailto:leves at caesar.elte.hu>> wrote:
>
>      Hi Eliot,
>
>     While we're extending specialObjectsArray, it may make sense adding
>     FloatArray and the currently non-existent Float64Array as well.
>
>
> Good point.  An at:[put:] primitive pair for Float64Array makes sense 
> too.
>
>     Levente
>
>     On Mon, 13 Jan 2020, Eliot Miranda 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
>     >
>     >
>     >
>
>
>
> -- 
> _,,,^..^,,,_
> best, Eliot

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20200115/14fc66e3/attachment.html>


More information about the Squeak-dev mailing list