*cough* 
$ perl -E " say  log(~0)/log(2) "
31.9999999996641

$ perl -E " say  int 0.999+log(~0)/log(2) "
32

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In reply to Re^3: reliably test integer size for portable bit-fiddling? (~0) by Anonymous Monk
in thread reliably test integer size for portable bit-fiddling? by wollmers

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