[vectorIntrinsics] RFR: 8261108: Add cast nodes from integer types to float types implementation for Arm SVE [v6]

[Ningsheng Jian]

On Thu, 25 Feb 2021 07:39:09 GMT, Wang Huang <whuang at openjdk.org> wrote:

>> Add the backend codegen for nodes like castb2f / castb2d / casts2f / casts2d / casti2f / casti2d / castl2f / castl2d.
>> 
>> * add `sve_scvtf`  ( and `sve_ucvtf`) encoding
>> * add mock for these instructions
>> * add `VECTOR_CAST_I2F_EXTEND[N]` and `VECTOR_CAST_I2F`
>> 
>> Thank you for your review.
>
> Wang Huang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix jcheck

Marked as reviewed by njian (Committer).

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PR: https://git.openjdk.java.net/panama-vector/pull/37