Messages in this thread | | | Date | Tue, 14 Jan 2014 21:51:43 -0500 | From | "Austin S. Hemmelgarn" <> | Subject | Re: [PATCH RFC] reciprocal_divide: correction/update of the algorithm |
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On 01/14/2014 06:25 PM, Borislav Petkov wrote: > On Tue, Jan 14, 2014 at 02:45:37PM -0800, Eric Dumazet wrote: >> Even on a Jaguar, the proposed alternative > I don't know what Jaguar you guys are talking about but the Jaguar > I know - Fam16h - has an int hardware divider: > > http://developer.amd.com/wordpress/media/2012/10/SOG_16h_52128_PUB_Rev1_1.pdf > > So all that talk about microcode is plain wrong. The hardware divider > comes from Llano (F12h) so it must be some other Jaguar, maybe Bobcat. > > :-) > > If it is Bobcat, then it has a 1-bit per cycle ucode int divider. > Apologies, it does have a hardware divider, however it still only gets 2 bits per cycle.
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