This is the mail archive of the gcc@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Bugs in operations of "long" type from GCC-3.4.6 32 bit.

From: Andreas Schwab <schwab at suse dot de>
To: "J.C. Pizarro" <jcpiza at gmail dot com>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 28 Mar 2007 01:36:32 +0200
Subject: Re: Bugs in operations of "long" type from GCC-3.4.6 32 bit.
References: <998d0e4a0703271531l1f75f170n740100b019c66af2@mail.gmail.com> <jey7li1e09.fsf@sykes.suse.de> <998d0e4a0703271629n678544fck56844b3231dc7c39@mail.gmail.com>

"J.C. Pizarro" <jcpiza@gmail.com> writes:

> The range of long should be -(2^63) ..  +((2^63)-1).

Your long has only 32 bits.

> For shifts, the range of a long type should be 0 .. 64 (65 values), not 0 .. 31.

Your long has only 32 bits.

>> %ld is not the correct format for a value of type long long, causing
>> undefined behaviour.
>
> %ld means long format for %d, is it wrong?

%ld is for long, not long long.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Follow-Ups:
- Re: Bugs in operations of "long" type from GCC-3.4.6 32 bit.
  - From: J.C. Pizarro

References:
- Bugs in operations of "long" type from GCC-3.4.6 32 bit.
  - From: J.C. Pizarro
- Re: Bugs in operations of "long" type from GCC-3.4.6 32 bit.
  - From: Andreas Schwab
- Re: Bugs in operations of "long" type from GCC-3.4.6 32 bit.
  - From: J.C. Pizarro

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]