Re: division by 7 without using division operator

The fact that compilers can perform this optimization -- and, perhaps
more important, can decide when it is and isn't necessary -- is a good
reason *not* to bother doing this yourself. Just divide by 7; that's
what the "/" operator is for.

/ operator often leads to 32 instructions of shift and add or an
instruction which takes that much time unless you have a multiplier
application to do it. This is the reason many a times it is avoided in
DSP, embedded systems applications and such hacks are needed.

.

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