Re: int128_t
Re: int128_t
- Subject: Re: int128_t
- From: Chris Espinosa <email@hidden>
- Date: Fri, 17 Oct 2008 12:26:59 -0700
On Oct 17, 2008, at 12:07 PM, Mark Wagner wrote: Take the US national debt, around 10 trillion dollars. Convert it to
a currency with a high exchange rate, e.g. the Zimbabwean Dollar at
around 2.5 trillion to the dollar as of July, and just for the hell of
it multiply by 100 (to allow for hyperinflation over the next month).
That's 10^28, which needs log(28) / log(2) = 93 bits. Why do you
think 128 bits will be enough?
Because 128 bits is 34,359,738,368 times larger than 93 bits. Thirty four billion times larger.
Regardless, vBigNum is the header you're looking for if you really want 128-bit integer arithmetic (or 256 or 512 or 1024 for that matter).
I think we can close this thread.
Chris |
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