Re: Use of C99 int types

[Dag Arne Osvik]

Andreas Schwab wrote:

> Dag Arne Osvik <da@xxxxxxxx> writes:
>
>  
>
> > Yes, but wouldn't it be much better to avoid code like the following, 
> > which may also be wrong (in terms of speed)?
> >
> > #ifdef CONFIG_64BIT  // or maybe CONFIG_X86_64?
> > #define fast_u32 u64
> > #else
> > #define fast_u32 u32
> > #endif
> >    
>
> How about using just unsigned long instead?
>  

unsigned long happens to coincide with uint_fast32_t for x86 and x86-64, 
but there's no guarantee that it will on other architectures.  And, at 
least in theory, long may even provide less than 32 bits.

--
 Dag Arne

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