llvm dev - May 2005 - [LLVMdev] x86 lock prefix

Hi,

I need the x86 backend to emit a "lock" prefix before a couple
of instructions.  I've added it as a prefix class to
X86InstrInfo.td:

class LOCK   { bits<4> Prefix = 11; }

and added it as a prefix to the relevant instructions.

I can't figure out how to get the "lock" prefix to actually
print when the asm code is printed.

Thanks,
Brent

On Mon, 9 May 2005, Brent Monroe wrote:
> I need the x86 backend to emit a "lock" prefix before a couple
> of instructions.  I've added it as a prefix class to
> X86InstrInfo.td:
>
> class LOCK   { bits<4> Prefix = 11; }
>
> and added it as a prefix to the relevant instructions.
ok.
> I can't figure out how to get the "lock" prefix to actually
> print when the asm code is printed.
Just add it to the asm string for the instruction:

   "lock; add ... "

-Chris