[X86] VZEROUPPER, VZEROALL missing from Sandybridge scheduler model

[topperc]

Bugzilla Link	35606
Resolution	FIXED
Resolved on	Nov 09, 2018 02:51
Version	trunk
OS	All
Blocks	#31672
CC	@legrosbuffle,@RKSimon

Extended Description

VZEROUPPER/VZEROALL has scheduling information for haswel,broadwell,skylake, but not sandybrige

[RKSimon]

Related: I've tagged these as WriteSystem at the moment, which is rather high for nearly all CPUs until they override it locally. There is also the issue that 32 and 64-bit modes have very different latencies.

[legrosbuffle]

rL343447 added VZEROALL on SNB and fixed it on HWS, BDW, SKX.

[legrosbuffle]

rL346482 fixed VZEROUPPER.