On Thu, 2024-03-07 at 21:07 +0800, chenglulu wrote: > > 在 2024/3/7 下午8:52, Xi Ruoyao 写道: > > It should be better to extend the expected value before the ll/sc loop > > (like what LLVM does), instead of repeating the extending in each > > iteration. Something like: > > I wanted to do this at first, but it didn't work out. > > But then I thought about it, and there are two benefits to putting it in > the middle of ll/sc: > > 1. If there is an operation that uses the $r4 register after this atomic > operation, another > > register is required to store $r4. > > 2. ll.w requires long cycles, so putting an addi.w command after ll.w > won't make a difference. > > So based on the above, I didn't try again, but directly made a > modification like a patch.
Ah, the explanation makes sense to me. Ok with the original patch then. -- Xi Ruoyao <xry...@xry111.site> School of Aerospace Science and Technology, Xidian University
