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

[Wang Huang]

On Wed, 31 Mar 2021 09:02:52 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,
> 
> SVE support immedicate CMP: `CMPEQ <Pd>.<T>, <Pg>/Z, <Zn>.<T>, #<imm>`. Could you please use the imm version here? We can save one `dup` instruction here.

Sure. Thank you for your wonderful advice.

-------------

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