[vectorIntrinsics] RFR: 8264469: Add Insert float nodes implementation for Arm SVE

[Ningsheng Jian]

On Wed, 31 Mar 2021 08:50:45 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> Add Insert float nodes implementation for Arm SVE, like insertD & insertF
>
> src/hotspot/cpu/aarch64/aarch64_sve.ad line 3326:
> 
>> 3324:     __ sve_index(as_FloatRegister($tmp$$reg), __ S, 0, 1);
>> 3325:     __ sve_dup(as_FloatRegister($tmp2$$reg), __ S, (int)($idx$$constant));
>> 3326:     __ sve_cmpeq(as_PRegister($pTmp$$reg), size, ptrue,
> 
> Use `size` instead of  `__ S` all through the codes ? Or remove line 3322, and use `__ S`.

Good catch. I think this patch has separated rules for different types, so removing line 3322 is better.

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PR: https://git.openjdk.java.net/panama-vector/pull/56