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From: wheisler@inflow.com To: gcc-gnats@gcc.gnu.org Subject: c/6607: Inconsisitency using right shift operator (signed vs. unsigned shift) Date: Wed, 08 May 2002 10:16:00 -0000 [thread overview] Message-ID: <20020508171303.18061.qmail@sources.redhat.com> (raw) >Number: 6607 >Category: c >Synopsis: Inconsisitency using right shift operator (signed vs. unsigned shift) >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Wed May 08 10:16:01 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Bill Heisler >Release: gcc 2.96 20000731 >Organization: >Environment: RH 7.1 Intel Glibc 2.2.3-16 gcc 2.96 >Description: When using a right shift operator that can be calculated at compile time, the operator performs an unsigned shift (prepends zeros). If the shift is parameterized, and is calculated at run time, a signed shift is performed (prepends high order bit). >How-To-Repeat: #include <stdio.h> int main (int argc, char ** argv) { unsigned int i = 0xffffffff >> 32; unsigned int j = 0xffffffff; j = j >> 32; printf("i -- %x\nj -- %x\n", i, j); } >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-05-08 17:16 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-05-08 10:16 wheisler [this message] 2002-05-08 10:38 neil 2002-05-09 23:04 neil
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