RFR: 8279668: x86: AVX2 versions of vpxor should be asserted [v3]

[Aleksey Shipilev]

On Mon, 10 Jan 2022 13:31:42 GMT, Jie Fu <jiefu at openjdk.org> wrote:

>> Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Add more asserts
>
> src/hotspot/cpu/x86/macroAssembler_x86.hpp line 1493:
> 
>> 1491:   // Simple version for AVX2 256bit vectors
>> 1492:   void vpxor(XMMRegister dst, XMMRegister src) {
>> 1493:     assert(UseAVX >= 2, "Only with AVX2");
> 
> I would suggest the assert msg as "Only with AVX2 or above".
> We should also update the copyright year.

Rephrased the assert message, updated copyright date. Thanks!

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PR: https://git.openjdk.java.net/jdk/pull/7005