From: Mihnea Balta <dark_lkml@mymail.ro>
To: Adrian Sandor <aditsu@yahoo.com>, gcc-help@gcc.gnu.org
Subject: Re: how to make a long long
Date: Thu, 20 Feb 2003 09:05:00 -0000 [thread overview]
Message-ID: <200302201103.14663.dark_lkml@mymail.ro> (raw)
In-Reply-To: <20030220085624.11949.qmail@web40309.mail.yahoo.com>
On Thursday 20 February 2003 10:56, Adrian Sandor wrote:
> Wich is the proper way to make an unsigned long long
> from two unsigned ints (high and low dwords) without
> too many conversions and calculations?
Choose whatever you like:
int main(){
union{
struct{
unsigned long long a:32;
unsigned long long b:32;
} gigi;
unsigned long long l;
} toto;
unsigned long long l;
unsigned long long referenceval;
toto.gigi.a = 0xFFFFFFFF;
toto.gigi.b = 0xFFFFFFFF;
l = 0xFFFFFFFF;
l <<= 32;
l += 0xFFFFFFFF;
memset(&referenceval, 0xFF, sizeof(referenceval));
printf("%llu\n%llu\n%llu\n", toto.l, l, referenceval);
return 0;
}
>
> thanks
>
> Adrian
>
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next prev parent reply other threads:[~2003-02-20 9:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-20 8:56 Adrian Sandor
2003-02-20 9:05 ` Mihnea Balta [this message]
2003-02-20 9:58 ` Adrian Sandor
2003-02-20 10:24 ` Mihnea Balta
2003-02-20 11:02 ` Sebastian Huber
2003-02-20 11:40 ` Mihnea Balta
[not found] <1045823803.20501.ezmlm@gcc.gnu.org>
2003-02-22 15:44 ` Adrian Sandor
2003-02-22 16:30 Sebastian Huber
2003-02-22 21:37 ` LLeweLLyn Reese
2003-02-22 22:13 ` Sebastian Huber
2003-02-24 5:51 ` LLeweLLyn Reese
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