RFR(S) 8075093: Enable UseFPUForSpilling support on SPARC
vladimir.kozlov at oracle.com
Wed Sep 2 23:26:24 UTC 2015
Thank you, Dean.
From bug report:
"Preliminary measurements using a micro-benchmark on SPARC T7-1 system
show 85% reduction in execution time with UseFPUForSpilling enabled."
On 9/2/15 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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