[LLVMdev] Emitting assembler code

[Vladimir Prus]

Chris Lattner wrote:

> > So the question is: how the information about format should be specified
> > in .td files? I've tried this:
> >
> > But the values of the TSFlags field for did not change.
>
> This one is definitely a tricky one.  Take a look at the InstrInfo
> tablegen class (in lib/Target/Target.td) and specifically the
> TSFlagsFields and TSFlagsShifts lists.  In the X86 backend these are
> implemented in X86.td.
>
> These specify exactly which fields of the Instruction classes should fill
> in which bits of the TSFlags field.  The only gross thing is that you
> currently have to define a parallel enum or something to access these in
> C++ code.  For the X86 backend, this enum is the one you've seen defined
> in X86InstrInfo.h

Thanks, this works perfectly!

- Volodya