[llvm-commits] [PATCH] JIT support for ARM

[Raul Fernandes Herbster]

Yes, Chris. I'd have to create a big switch table.

2007/8/17, Chris Lattner <clattner at apple.com>:
>
>
> On Aug 17, 2007, at 12:02 PM, Evan Cheng wrote:
>
> >  void *ARMJITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter
> > &MCE) {
> > -  unsigned addr = (intptr_t)Fn-MCE.getCurrentPCValue()-4;
> > +  unsigned addr = (intptr_t)Fn;
> >    // If this is just a call to an external function, emit a branch
> > instead of a
> >    // call.  The code is the same except for one bit of the last
> > instruction.
> >    if (Fn != (void*)(intptr_t)ARMCompilationCallback) {
> > +    // branch to the corresponding function addr
> > +    MCE.startFunctionStub(8, 4);
> > +    MCE.emitWordLE(0xE51FF004); // LDR PC, [PC,#-4]
> >
> > This is ok.... But I would rather see you refactor
> > getBinaryCodeForInstr() so you can "manufacture" the value by
> > passing it ARM::LDR, ARM::PC, etc.? Do you think that's possible?
>
> This probably isn't possible, because it would require creating a
> machineinstr to pass in.  Other JITs do similar things :(
>
> -Chris
>
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-- 
Raul Fernandes Herbster
Embedded and Pervasive Computing Laboratory - embedded.dee.ufcg.edu.br
Electrical Engineering Department - DEE - www.ee.ufcg.edu.br
Electrical Engineering and Informatics Center - CEEI
Federal University of Campina Grande - UFCG - www.ufcg.edu.br
Caixa Postal 10105
58109-970 Campina Grande - PB - Brasil
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