RFR(S): x86: 8190494: fix for different results with UseAVX=3 when calling AVX-512 native function via JNI.
vladimir.kozlov at oracle.com
Thu Nov 30 16:55:52 UTC 2017
Thank you, Vivek
Changes looks good based on your description.
Please, explain why using mask register in scalar instructions is bad.
I will start pre-integration testing and let you know results.
On 11/30/17 7:28 AM, Deshpande, Vivek R wrote:
> I have bug fix for 8190494: Different results with UseAVX=3 when calling AVX-512 native function via JNI.
> Mask register not being reset after JNI and the scalar floating point instructions using the mask register encoding with
> AVX 512 in the assembler causing this problem.
> I have tested it with jtreg on hotspot/compiler and SPECjvm2008 on knights landing and skylake.
> I have also updated the JBS entry.
> Would you please review and sponsor it.
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