RFR: 8320347: Emulate vblendvp[sd] on ECore [v7]

[Volodymyr Paprotski]

On Mon, 27 Nov 2023 05:47:55 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Volodymyr Paprotski has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   whitespace again
>
> src/hotspot/cpu/x86/x86.ad line 7821:
> 
>> 7819: 
>> 7820: instruct vblendvpFD(legVec dst, legVec src1, legVec src2, legVec mask) %{
>> 7821:   predicate(UseAVX > 0 && !EnableX86ECoreOpts &&
> 
> Why do you not call newly added macro assembly routine to emulate vblendvps from instruction encoding, we already have EnableX86ECoreOpts checks within it.

I would have to change the effect to give myself a temp for the scratch register.. Seems safer not to change existing behaviour.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16716#discussion_r1406321929