On Jan 24, 2009, at 8:36 PM, x yz wrote:
Just build webkit on XP using cgywin, not tested yet. I want to port to 32bit MIPS, it seems I need to touch JIT and rewrite assembler folder.
Once you have the bytecode interpreter up and running on MIPS, I'd recommend starting by just trying to port WREC (the regular expression JIT). This is a good starting point because it utilizes a smaller subset of the MacroAssembler interface, and has a much simpler interface to C code (JIT code is called with C calling conventions, and no callbacks are made into C from the JIT generated code).
Any document there on javascripcore/assembler? I also want a smart way to make sure output is correct.
A very simple way to validate you are generating the correct code is to simply force the JIT to insert a breakpoint (i.e. use MacroAssembler::breakpoint()) at the head of the function you are generating, then run jsc under a debugger, and when it hits the breakpoint simply disassemble the code in memory at the point it has stopped. Now you can visually inspect that it it has generated the code you were expecting.
Good luck! G.
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