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

[Ningsheng Jian]

On Sat, 27 Feb 2021 02:34:13 GMT, Wang Huang <whuang at openjdk.org> wrote:

> * reuse macro `VECTOR_CAST_I2F_NARROW1` `VECTOR_CAST_I2F_EXTEND1` (Should we change these macro names?)

I think it would be better to change the macro name.

src/hotspot/cpu/aarch64/assembler_aarch64.hpp line 3438:

> 3436:   }
> 3437: 
> 3438: // SVE floating-point convert precision(predicated)

space between precision and '(' ?

src/hotspot/cpu/aarch64/assembler_aarch64.hpp line 3450:

> 3448:   }
> 3449: 
> 3450:   INSN(sve_fcvt);

Since there's only one use of the INSN macro, I think it's no need to define a macro here.

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