RFR: 8294194: [AArch64] Create intrinsics compress and expand [v2]

[Andrew Haley]

On Tue, 1 Nov 2022 10:53:19 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> src/hotspot/cpu/aarch64/aarch64.ad line 2294:
>> 
>>> 2292:     case Op_CacheWBPostSync:
>>> 2293:       if (!VM_Version::supports_data_cache_line_flush()) {
>>> 2294:         ret_value = false;
>> 
>> Doesn't this stuff belong in aarch64_sve.ad?
>
> I'm not sure exactly what you are asking about here. However, if it is about the Op_CacheWB* checks then the answer is no. These are memory flush operations that are used by the code that syncs writes to persistent memory (NVRam) mapped buffers.

I'm talking about the SVE intrinsics.

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PR: https://git.openjdk.org/jdk/pull/10537