[webkit-dev] x86-64 JIT

[Mike Hommey]

Hi,

I was taking a quick look at the JIT code and also gave a shot at
forcing a build of the x86-64 code under Linux.

The main problem right now is the following:
../JavaScriptCore/jit/JITArithmetic.cpp:664: error: cast from 'JSC::Structure*' to 'unsigned int' loses precision
../JavaScriptCore/jit/JITArithmetic.cpp:674: error: cast from 'JSC::Structure*' to 'unsigned int' loses precision
../JavaScriptCore/jit/JITArithmetic.cpp:714: error: cast from 'JSC::Structure*' to 'unsigned int' loses precision
../JavaScriptCore/jit/JITArithmetic.cpp:724: error: cast from 'JSC::Structure*' to 'unsigned int' loses precision

Looking at the code, it seems really too much x86-centric, and
depending on how the x86-64 ABI is under OSX. I don't know how things
are going to evolve with Snow-Leopard, as I hear the kernel will finally
be 64-bits, but maybe the same issue will arise.

Anyways, I'd need guidance from some people with JIT knowledge to help
me get it work on Linux.

Cheers,

Mike