[jdk16] RFR: 8259044： JVM lacks data type qualifier when using -XX:+PrintAssembly with AArch64-Neon backend

[Ningsheng Jian]

On Mon, 4 Jan 2021 09:37:33 GMT, Wang Huang <whuang at openjdk.org> wrote:

> For instace: in the implentation of VectorMaskCmp & VectorStoreMask :
> 
> $jtreg -vmoptions:"-XX:+PrintAssembly" ./Int128VectorTests.java
> 
> before fixing
> -----------------
> 0dc ldrq V17,[R10, #16] # vector (128 bits)
> 0e0 cmeq V16, V16, V17 # vector cmp (4I)
> 0e4 xtn V16, V16 # 4S to 4H
>         xtn V16, V16 # 4H to 4B
>         negr V16, V16 # store mask (4S to 4B)
> -----------------
> Here， the output lacks data type qualifiers like T4S in `cmeq V16, V16, V17`.
> 
> Expect:
> -----------------
> 0dc ldrq V16,[R10, #16] # vector (128 bits)
> 0e0 cmeq V16, T4S, V16, V18 # vector cmp (4I)
> 0e4 xtn V16, T4H, V16, T4S # 4S to 4H
>            xtn V16, T8B, V16, T8H # 4H to 4B
>            negr V16, T8B, V16 # store mask (4S to 4B)
> -----------------

This looks good to me. But should this P4 enhancement go to https://github.com/openjdk/jdk instead of here?

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PR: https://git.openjdk.java.net/jdk16/pull/77