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

From: "J.C. Pizarro" <jcpiza at gmail dot com>
To: "Andreas Schwab" <schwab at suse dot de>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 28 Mar 2007 02:30:59 +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> <jetzw61cov.fsf@sykes.suse.de>

2007/3/28, Andreas Schwab <schwab@suse.de>:

"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.


Very thanks, LL and %lld are the solution. The GCC compiler has not
bugs that i said.

Attachment: testing_long_GCC_march2007_3.tar.gz
Description: GNU Zip compressed data

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

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