[aarch64-port-dev ] RFR: aarch64: Add Arrays.fill stub code

[Andrew Haley]

On 04/06/2016 01:51 PM, Long Chen wrote:

> Please review this patch for generating stub code for ArrayFill on aarch64
> platform.
> 
> Performance test case:
> http://people.linaro.org/~long.chen/ArrayFill/ArrayFill.java
> Testing result: http://people.linaro.org/~long.chen/ArrayFill/ArrayFill.html
> Patch: http://people.linaro.org/~long.chen/ArrayFill/ArrayFill.patch
> 
> At same time, refactoring ClearArrayNode's code generation, as it can be
> used by Array fill too.

Looks good.  Minor nit:

+  // Generate stub for disjoint fill. If "aligned" is true, the
+  // "to" address is assumed to be heapword aligned.

"disjoint" doesn't make any sense here.

> Following up I would like to propose a patch to use DC ZVA for large array
> zeroing.

OK.  I haven't seen much advantage to using DC ZVA, but I'm
prepared to listen.

Andrew.