CR for RFR 8142980

Berg, Michael C michael.c.berg at
Thu Nov 19 21:58:21 UTC 2015

Vladimir, since I have folks requesting more additions anyways, I will clean them up on the next round. 


-----Original Message-----
From: Vladimir Ivanov [mailto:vladimir.x.ivanov at] 
Sent: Thursday, November 19, 2015 12:38 PM
To: Berg, Michael C; 'hotspot-compiler-dev at'
Subject: Re: CR for RFR 8142980

I'm curious why some of CPU capability checks are 32-bit only, e.g.:
+  NOT_LP64(assert(VM_Version::supports_evex(), ""));

+  NOT_LP64(assert(VM_Version::supports_avx512dq(), ""));

Best regards,
Vladimir Ivanov

On 11/13/15 11:50 PM, Berg, Michael C wrote:
> Hi Folks,
> I would like to contribute bug fixes for AVX 512 which address 64-bit 
> derby on EVEX enabled targets as well as KNL support and instrinsic 
> support for AVX512.
> These changes are also needed for a follow on changeset which 
> introduces the use of these additions in the AVX512 instrinsic code.
> Bug-id:
> webrev:
> The derby metric fails to run on 64-bit SKX and KNL EVEX enabled 
> platforms. Also code support is needed for AVX512 intrinsics and 
> include KNL support.
> Thanks,
> Michael

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