RFR: 8287139: aarch64 intrinsic for unsignedMultiplyHigh

[Ningsheng Jian]

On Mon, 23 May 2022 11:59:02 GMT, Raffaello Giulietti <duke at openjdk.java.net> wrote:

> Adds aarch64 intrinsic support for `Math.unsignedMultiplyHigh()`

src/hotspot/cpu/aarch64/aarch64.ad line 11146:

> 11144: %}
> 11145: 
> 11146: instruct umulHiL_rReg(iRegLNoSp dst, iRegL src1, iRegL src2, rFlagsReg cr)

`rFlagsReg cr` is not used.

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

PR: https://git.openjdk.java.net/jdk/pull/8840