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- Subject: Re: lua_number2integer
- From: Tony Finch <dot@...>
- Date: Thu, 25 Sep 2008 18:45:21 +0100
On Thu, 25 Sep 2008, Mike Pall wrote:
>
> Apparently the call overhead for floor() is the main factor here
> because the '%' operator also uses floor() (the inlined C library
> function).
It is usually not inlined. As far as I can tell this is because it has
caused too many optimizer bugs in the past. The implementation uses really
nasty fiddling of the FP rounding mode - it's surprisingly non-trivial.
Tony.
--
f.anthony.n.finch <dot@dotat.at> http://dotat.at/
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GOOD, OCCASIONALLY POOR IN ROCKALL AND HEBRIDES.
