Rob Landley wrote: > This doesn't _need_ bignum support. It maxes out around 72 bits and > the _result_ can't use more than about $SHIFT bits because you're > dividing by the amount you shifted, so just chop off the bottom 32 > bits, do a normal 64 bit division on the top (it has to fit), and > then do the same division on the appropriate shifted remainder, and > combine the results. This is easy because when the shift _is_ 32 > bits or more, the bottom 32 bits all have to be zeroes so you don't > even have to mask and add, just shift the remainder left 32 bits so > you can continue the divide. > > Pulling out perl isn't always a good alternative to thinking about > the problem.
Related query: Does the Perl script being replaced use 64-bit arithmetic? Because many Perl installations only do 32-bit arithmetic. If the Perl version works in 32-bit arithmetic, why does the shell version not do the same thing? -- Jamie -- To unsubscribe from this list: send the line "unsubscribe linux-embedded" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
