From: Dag Arne Osvik <da@osvik.no>
To: Andreas Schwab <schwab@suse.de>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, linux-kernel@vger.kernel.org
Subject: Re: Use of C99 int types
Date: Mon, 04 Apr 2005 00:48:04 +0200 [thread overview]
Message-ID: <425072A4.7080804@osvik.no> (raw)
In-Reply-To: <jezmwgxa5v.fsf@sykes.suse.de>
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. And, at
least in theory, long may even provide less than 32 bits.
--
Dag Arne
next prev parent reply other threads:[~2005-04-03 22:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-03 11:55 Use of C99 int types Dag Arne Osvik
2005-04-03 12:05 ` Stephen Rothwell
2005-04-03 12:30 ` Dag Arne Osvik
2005-04-03 13:27 ` Andreas Schwab
2005-04-03 22:48 ` Dag Arne Osvik [this message]
2005-04-03 23:05 ` Al Viro
2005-04-03 23:17 ` Grzegorz Kulewski
2005-04-03 23:20 ` Dag Arne Osvik
2005-04-04 0:05 ` Adrian Bunk
2005-04-03 18:13 ` Al Viro
2005-04-03 23:03 ` Dag Arne Osvik
2005-04-04 3:08 ` Herbert Xu
2005-04-04 8:42 ` Dag Arne Osvik
2005-04-03 19:23 ` Renate Meijer
2005-04-03 20:25 ` Kenneth Johansson
2005-04-03 22:08 ` Kyle Moffett
2005-04-04 10:05 ` Renate Meijer
2005-04-04 10:50 ` Dag Arne Osvik
2005-04-04 20:30 ` Renate Meijer
2005-04-04 20:57 ` Al Viro
2005-04-04 21:25 ` Richard B. Johnson
2005-04-04 21:49 ` Kyle Moffett
2005-04-05 9:23 ` Renate Meijer
2005-04-05 11:27 ` Kyle Moffett
[not found] ` <09142f748cc6ad2bf4fffab7a5519226@xs4all.nl>
2005-04-05 22:11 ` Kyle Moffett
[not found] ` <eb65bccddde63541ae4b7b2d6c4c32d3@xs4all.nl>
2005-04-06 21:11 ` Kyle Moffett
2005-04-07 11:28 ` Renate Meijer
2005-04-05 12:18 ` Richard B. Johnson
2005-04-05 21:47 ` Kyle Moffett
2005-04-05 8:49 ` Renate Meijer
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