How to write a JIT library?

Question

I've browsed through many JIT libraries. But I'd like to learn how to write one.

Softwire looked like nice. Though what the emitter interface should do? Can I do something better than existing libraries? How do I support inline caching?

Answer 1

I would recommend you join an existing team instead of starting from scratch. The PyPy team's work on this area is very interesting and is currently under development, so may be a good place to start and seek more information, and then perhaps help.

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http://codespeak.net/pypy/dist/pypy/doc/jit/overview.html

http://codespeak.net/pypy/dist/pypy/doc/jit/pyjitpl5.html

http://codespeak.net/svn/pypy/extradoc/talk/icooolps2009/bolz-tracing-jit-final.pdf

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Other good readings on the PyPy blog:

http://morepypy.blogspot.com/2010/05/efficient-and-elegant-regular.html

http://morepypy.blogspot.com/2010/06/jit-for-regular-expression-matching.html

http://morepypy.blogspot.com/search/label/jit

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This may interest you also:

http://indefinitestudies.org/2010/02/08/creating-a-toy-virtual-machine-with-pypy/