From: Andrew Haley <aph@redhat.com>
To: "Sivaprasad.pv" <sivaprasad.pv@redpinesignals.com>
Cc: gcc <gcc-help@gcc.gnu.org>
Subject: Re: regarding type promotion
Date: Tue, 19 Aug 2008 13:24:00 -0000 [thread overview]
Message-ID: <48AA8746.8010603@redhat.com> (raw)
In-Reply-To: <48AA5377.9080001@redpinesignals.com>
Sivaprasad.pv wrote:
> If we consider following sample C language code :
>
> long long int k=0x123;
> int p=1;
> k = k + p << 33;
>
> Here the value in variable 'p' is shifted by 33 and then the result
> (only 32 bit result)was promoted to 64 bit.
> Is it an expected behavior?
Yes.
> Is there any way to specify in gcc to perform implicit type promotion
> first and then perform operation on it (without explicit type casting).
I'm not sure exactly what you mean by "without explicit type casting",
but the correct way to write this is
k = k + (long long)p << 33;
The promotion rules are part of the language standard.
Andrew.
next prev parent reply other threads:[~2008-08-19 8:42 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-19 8:38 Sivaprasad.pv
2008-08-19 13:24 ` Andrew Haley [this message]
2008-08-19 15:35 ` Eljay Love-Jensen
2008-08-19 16:33 ` Bob Plantz
2008-08-19 16:34 ` Richard Harvey Chapman
2008-08-19 17:02 ` Ian Lance Taylor
2008-08-19 22:07 ` Richard Harvey Chapman
2008-08-20 2:28 ` Ian Lance Taylor
2008-08-19 22:36 ` Richard Harvey Chapman
2008-08-19 16:45 ` Richard Harvey Chapman
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