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Date: Tue, 13 Mar 2012 11:04:21 -0000 From: "David Laight" <David.Laight@...LAB.COM> To: "Maciej Zenczykowski" <zenczykowski@...il.com>, "Maciej Zenczykowski" <maze@...gle.com> Cc: <netdev@...r.kernel.org> Subject: RE: [PATCH] net: pfifo_fast - use ffs(x)-1 instead of array lookup > + /* For i in 0..7 returns {-1, 0, 1, 0, 2, 0, 1, 0}[i] */ > + return ((26468 >> (i+i)) & 3) - 1; That expression doesn't seem quite right to me ... return (int)(0x12131210 >> (i * 4)) & 3) - 1; probably does what is wanted. David -- 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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