[aarch64-port-dev ] 8248238: Implementation of JEP: Windows AArch64 Support

[Bernhard Urban-Forster]

On 25/08/2020 13:51, Andrew Haley wrote:
> Can you argue why this is correct?
> 
> +inline void OrderAccess::release() {
> +  _WriteBarrier();
> +  __dmb(_ARM64_BARRIER_ISHST);
> +}

Not exactly sure what your questions is. _WriteBarrier() is the compiler barrier [1] while __dmb() is the intrinsic [2] for said ARM64 instruction (note, it's not the macro assembler one).

-Bernhard

[1] https://docs.microsoft.com/en-us/cpp/intrinsics/writebarrier?view=vs-2019
[2] https://docs.microsoft.com/en-us/cpp/intrinsics/arm64-intrinsics?view=vs-2019