On 10/20/2016 10:51 AM, Pranith Kumar wrote:
Added back
/* Load/Store exclusive instructions are implemented by remembering
the value/address loaded, and seeing if these are the same
when the store is performed. This should be sufficient to implement
the architecturally mandated semantics, and avoids having to monitor
regular stores. The compare vs the remembered value is done during
the cmpxchg operation, but we must compare the addresses manually. */
FYI, I do not see this in your v7 series.
I do. It's in patch 28:
/* Load/Store exclusive instructions are implemented by remembering
the value/address loaded, and seeing if these are the same
- when the store is performed. This should be sufficient to implement
+ when the store is performed. This should be sufficient to implement
the architecturally mandated semantics, and avoids having to monitor
- regular stores.
-
- In system emulation mode only one CPU will be running at once, so
- this sequence is effectively atomic. In user emulation mode we
- throw an exception and handle the atomic operation elsewhere. */
+ regular stores. The compare vs the remembered value is done during
+ the cmpxchg operation, but we must compare the addresses manually. */
r~
