Are you sure? My coy of PowerISA lists the numbers that I used? What makes you
think it should be shifted by one bit?

On Mon, Jan 16, 2017 at 08:45:58PM -0600, Justin Hibbits wrote:
> The patch is incorrect, the 'xo' values are off by one bit (inline  
> change):
> 
> 
> On Dec 5, 2016, at 10:19 AM, Roman Divacky wrote:
> 
> > Can you try this patch?
> >
> > Index: llvm/lib/Target/PowerPC/PPCInstrInfo.td
> > ===================================================================
> > --- llvm/lib/Target/PowerPC/PPCInstrInfo.td (revision 288675)
> > +++ llvm/lib/Target/PowerPC/PPCInstrInfo.td (working copy)
> > @@ -2373,6 +2373,12 @@
> > def MFTB : XFXForm_1<31, 371, (outs gprc:$RT), (ins i32imm:$SPR),
> >                      "mftb $RT, $SPR", IIC_SprMFTB>;
> >
> > +def MFPMR : XFXForm_1<31, 334, (outs gprc:$RT), (ins i32imm:$PMRN),
> 
> 334 should be 167
> 
> > +                     "mfpmr $RT, $PMRN", IIC_IntGeneral>;
> > +
> > +def MTPMR : XFXForm_1<31, 462, (outs), (ins i32imm:$PMRN, gprc:$RS),
> > +                     "mtpmr $PMRN, $RS", IIC_IntGeneral>;
> 
> 462 should be 231.
> 
> > +
> > // A pseudo-instruction used to implement the read of the 64-bit  
> > cycle counter
> > // on a 32-bit target.
> > let hasSideEffects = 1, usesCustomInserter = 1 in
> >
> 
> I'll have a patch ready for LLVM review within a week or so, including  
> some level of scheduling.
> 
> - Justin
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