Messages in this thread | | | Subject | Re: [PATCH v2 10/30] Add x86-specific parity functions | From | Zeng Zhaoxiu <> | Date | Thu, 7 Apr 2016 11:55:51 +0800 |
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在 2016年04月06日 18:53, Borislav Petkov 写道: > On Wed, Apr 06, 2016 at 11:37:37AM +0100, One Thousand Gnomes wrote: >> Even that would still be wrong for the smaller parity values. The CPU >> supports 8bit parity directly going back to the 8086 so the >> implementation for 8bit and I think 16bit is still wrong. > I was objecting to the unnecessary replication of the hweight/popcnt > glue. > > And yes, one could look up the definition of the parity flag on x86 and > then base the implementation of all those smaller ones on that as the > hardware does it for one practically for free there. > > :-) >
SETcc (SETPO etc.) added since 80386, is this a problem?
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