CR for RFR 8142980
Berg, Michael C
michael.c.berg at intel.com
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.
From: Vladimir Ivanov [mailto:vladimir.x.ivanov at oracle.com]
Sent: Thursday, November 19, 2015 12:38 PM
To: Berg, Michael C; 'hotspot-compiler-dev at openjdk.java.net'
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(), ""));
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: https://bugs.openjdk.java.net/browse/JDK-8142980
> 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.
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