Bytecode executor

FredBlais

In the Propeller 2 datasheet, there is mention of 6-clock custom-bytecode executor for interpreted languages. Is there any documentation about that?

dnalor

You have to search for XBYTE.
Page 24 here: https://docs.google.com/document/d/1gn6oaT5Ib7CytvlZHacmrSbVBJsD9t_-kmvjd7nUR6o/edit?_ga=2.240644547.1936649111.1663502886-1785724881.1639682292&pli=1&tab=t.0#heading=h.n6kli7pxhgww
Page 29 here: https://docs.google.com/document/d/1BuU96MnMkI0Ha1gjmtUlZPCcbGffNyZEp_1ONjLC7Vs/edit?pli=1&tab=t.0#heading=h.1ci93xb
Here: https://p2docs.github.io/xbyte.html

ersmith

Some examples of bytecode executors using XBYTE:

The canonical example, Chip's Spin2 bytecode interpreter. Fairly complicated, but it's from the master himself:
https://github.com/parallaxinc/P2_PNut_Public/blob/master/Spin2_interpreter.spin2

A really simple example: https://github.com/totalspectrum/p2-jit-tools/blob/master/sample_xbyte.spin2

A somewhat less simple but more realistic example: https://github.com/totalspectrum/zog/blob/master/zog_p2.spin

The last two probably need flexspin to compile.

FredBlais

@dnalor said:
You have to search for XBYTE.
Page 24 here: https://docs.google.com/document/d/1gn6oaT5Ib7CytvlZHacmrSbVBJsD9t_-kmvjd7nUR6o/edit?_ga=2.240644547.1936649111.1663502886-1785724881.1639682292&pli=1&tab=t.0#heading=h.n6kli7pxhgww
Page 29 here: https://docs.google.com/document/d/1BuU96MnMkI0Ha1gjmtUlZPCcbGffNyZEp_1ONjLC7Vs/edit?pli=1&tab=t.0#heading=h.1ci93xb
Here: https://p2docs.github.io/xbyte.html

I need to get my head around all the different P2 manuals!

• P2 Spec Sheet
• P2 Datasheet
• P2 Reference Manual
• P2 Hardware Manual
• P2 Documentation
• PASM2 Manual
• PASM2 Instruction list
• Spin 2 Manual

evanh

• The Silicon Doc is the original and still the primary reference for the hardware. Some instruction details are in here too.
• The Hardware Manual is the beginnings of, but definitely incomplete, a more fleshed version of the Silicon Doc.
• The Spin2 Documentation is the original and primary reference for the Spin2 language, and some useful info for Pasm2 too.
• The Assembly Language Manual is verbose details on the instruction set. I haven't used this doc myself so I don't know how complete it is.
• The Pasm2 Instructions spreadsheet is concise for looking around all the instructions quickly. This and the Silicon Doc were the best info for a long time. This is still very handy because it's all on one page.
• Spec Sheet and data sheet are press release and purchasing info.