[aarch64-port-dev ] RFR: [8u] JDK-8211320: AArch64: unsafe.compareAndSetByte() and unsafe.compareAndSetShort() c2 intrinsics broken with negative expected value

[Andrew Dinn]

On 27/08/2019 18:11, Andrew Haley wrote:
> On 8/27/19 6:03 PM, Aleksey Shipilev wrote:
>> I am leaning towards dropping this from 8u-aarch64 backports.
> 
> You and me both.
Ok, I'm going to drop this backport then. At first I was, as per
Aleksey, concerned that method MacroAssembler::compare_eq might be
needed for

  8217368: AArch64: C2 recursive stack locking optimisation not triggered

(that's the one I split into two parts where the first part replaces
inline compare and exchange encoding in fast_lock/unlock with a call to
MacroAssembler::cmpxchg). However, compare_eq is not needed. The
existing 32/64 bit (word/xword) cmpxchg code caters for the
fast_lock/unlock case.

regards,


Andrew Dinn
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