RFR(S) 8075093: Enable UseFPUForSpilling support on SPARC
dean.long at oracle.com
Wed Sep 2 23:48:59 UTC 2015
On 9/2/2015 4:26 PM, Shrinivas Joshi wrote:
> Hi Dean,
> Thanks for the review.
> I only tried it on a micro-benchmark where a local variable in a tight
> loop was getting spilled to/filled from the stack. I noticed about 85%
> reduction in execution time.
> On 9/2/2015 4:18 PM, Dean Long wrote:
>> Looks fine. Was there any measurable performance improvement?
>> On 9/2/2015 12:51 PM, Vladimir Kozlov wrote:
>>> SPARC S3 core and beyond have single-cycle MOV instructions
>>> (MOVdTOx, MOVxTOd) for FP-to-GP and GP-to-FP register moves. These
>>> when used under UseFPUForSpilling can help improve performance.
>>> Contributed-by: Shrinivas Joshi
>>> I reviewed changes.
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