tree b12a768b34d0461978276533b73436c4494fe71f
parent 1c07db46511f0d2335d3b32008f644164071d13e
author Nicolas Pitre <nicolas.pitre@linaro.org> 1446494105 -0500
committer Nicolas Pitre <nicolas.pitre@linaro.org> 1447701243 -0500

div64.h: optimize do_div() for power-of-two constant divisors

Let's perform the obvious mask and shift operation in this case.

On 32-bit targets, gcc is able to do the same thing with a constant
divisor that happens to be a power of two i.e. it turns the division
into an inline shift, but it doesn't hurt to be explicit.

Signed-off-by: Nicolas Pitre <nico@linaro.org>