Re: [RFC] intdiv()
| From: | Andrea Faulds | Date: | Thu, 17 Jul 2014 13:31:42 +0000 |
| Subject: | Re: [RFC] intdiv() | ||
| References: | 1 2 3 4 5 6 7 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-75670@lists.php.net to get a copy of this message | ||
On 17 Jul 2014, at 10:24, Nikita Popov <nikita.ppv@gmail.com> wrote:
> This is already what is currently happening, see
> http://lxr.php.net/xref/PHP_TRUNK/Zend/zend_operators.c#1067.
>
> Andreas proposal is only useful in the case that the numbers don't divide
> exactly and you need round-down/truncation behavior and your numbers are in
> a range where the indirection through double arithmetic results in
> precision loss.
It’s still useful regardless as it saves you implementing it in terms of floats.
I mean, you can implement a right shift (rarely used outside bit masks) in terms of multiplication
and exponentiation, but that doesn’t mean you shouldn’t have a right shift.
--
Andrea Faulds
http://ajf.me/