Messages in this thread | ![/](/images/icornerl.gif) | | Date | Mon, 4 Apr 2005 02:05:59 +0200 | From | Adrian Bunk <> | Subject | Re: Use of C99 int types |
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On Mon, Apr 04, 2005 at 12:48:04AM +0200, Dag Arne Osvik wrote: > Andreas Schwab wrote: > > >Dag Arne Osvik <da@osvik.no> 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. >...
The stdint.h shipped with glibc says:
<-- snip -->
/* Unsigned. */ typedef unsigned char uint_fast8_t; #if __WORDSIZE == 64 typedef unsigned long int uint_fast16_t; typedef unsigned long int uint_fast32_t; typedef unsigned long int uint_fast64_t; #else typedef unsigned int uint_fast16_t; typedef unsigned int uint_fast32_t; __extension__ typedef unsigned long long int uint_fast64_t; #endif
<-- snip -->
> Dag Arne
cu Adrian
--
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