[vectorIntrinsics] RFR: 8262492: Add cast nodes between float types implementation for Arm SVE [v2]

[Ningsheng Jian]

On Wed, 3 Mar 2021 06:51:21 GMT, Wang Huang <whuang at openjdk.org> wrote:

>> Add cast nodes like castf2d castd2f
>> 
>> * add `sve_fcvt`
>> * reuse macro `VECTOR_CAST_I2F_NARROW1` `VECTOR_CAST_I2F_EXTEND1` (Should we change these macro names?)
>> 
>> other issues :
>> * precision loss
>
> Wang Huang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   change macro names

Looks good to me.

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Marked as reviewed by njian (Committer).

PR: https://git.openjdk.java.net/panama-vector/pull/41