Re: [Boost-users] How to find: best integer type for processor

Subject: Re: [Boost-users] How to find: best integer type for processor
From: Francesco Biscani (bluescarni_at_[hidden])
Date: 2008-10-30 13:56:36

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Cory Nelson wrote:
> Most things don't need 64-bit ints, so it would just be wasting memory
> to use them if 32-bit ints are as fast or faster.  This is why "int"
> stays 32-bit on most x64 ABIs.
> 
> If you want the largest native integer, though not 100% portable to
> weird archs, this should work in x86/x64 and most others:
> 
> typedef boost::int_t<sizeof(void*) * 8>::fast fastint_t;
> 

I use this approach when I need the maximum "fast" integer type. If you
are really paranoid about the pointer/fast integer size ratio not being
1, you can add a BOOST_STATIC_ASSERT somewhere to prevent compilation on
weird archs.

  Francesco.
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