Hi! I didn't see this until now, almost a month later, sorry about that :-)
On Thu, Feb 04, 2021 at 01:57:53PM +0530, Naveen N. Rao wrote: > On 2021/02/03 03:17PM, Segher Boessenkool wrote: > > Power8 does: > > > > Load with Update Instructions (RA = 0) > > EA is placed into R0. > > Load with Update Instructions (RA = RT) > > EA is placed into RT. The storage operand addressed by EA is > > accessed, but the data returned by the load is discarded. > > I'm actually not seeing that. This is what I am testing with: > li 8,0xaaa > mr 6,1 > std 8,64(6) > #ldu 6,64(6) > .long 0xe8c60041 > > And, r6 always ends up with 0xaea. It changes with the value I put into > r6 though. That is exactly the behaviour specified for p8. 0aaa+0040=0aea. > Granted, this is all up in the air, but it does look like there is more > going on and the value isn't the EA or the value at the address. That *is* the EA. The EA is the address the insn does the access at. Segher