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Date: Thu, 16 Jan 2014 18:24:06 +0100 From: Hannes Frederic Sowa <hannes@...essinduktion.org> To: Christoph Lameter <cl@...ux.com> Cc: Daniel Borkmann <dborkman@...hat.com>, davem@...emloft.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>, Austin S Hemmelgarn <ahferroin7@...il.com>, Jesse Gross <jesse@...ira.com>, Jamal Hadi Salim <jhs@...atatu.com>, Stephen Hemminger <stephen@...workplumber.org>, Matt Mackall <mpm@...enic.com>, Pekka Enberg <penberg@...nel.org>, Andy Gospodarek <andy@...yhouse.net>, Veaceslav Falico <vfalico@...hat.com>, Jay Vosburgh <fubar@...ibm.com>, Jakub Zawadzki <darkjames-ws@...kjames.pl> Subject: Re: [PATCH net-next 2/2] reciprocal_divide: correction/update of the algorithm On Thu, Jan 16, 2014 at 10:37:37AM -0600, Christoph Lameter wrote: > On Thu, 16 Jan 2014, Daniel Borkmann wrote: > > > - * or else the performance is slower than a normal divide. > > - */ > > -extern u32 reciprocal_value(u32 B); > > +struct reciprocal_value { > > + u32 m; > > + u8 sh1, sh2; > > +}; > > > > +#define RECIPROCAL_VALUE_RESULT_TO_ZERO ((struct reciprocal_value){.sh1 = 32}) > > > > -static inline u32 reciprocal_divide(u32 A, u32 R) > > +struct reciprocal_value reciprocal_value(u32 d); > > A function that returns a struct? That works? Which gcc versions support > it? Sure, that works and I actually like it. This is supported by the c standard, but please don't ask me since which one. ;) Greetings, Hannes -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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