filter: use reciprocal divide

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At compile time, we can replace the DIV_K instruction (divide by a
constant value) by a reciprocal divide.

At exec time, the expensive divide is replaced by a multiply, a less
expensive operation on most processors.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2010-11-18 22:04:46 +00:00 • committed by David S. Miller

parent 8c1592d68b

commit c26aed40f4

1 changed files with 3 additions and 1 deletions

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net/core/filter.c

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