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From: "mail dot alexhaase at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/43756]  New: Bit shifitng by a constant 32 isn't the same as bitshifting by a variable 32.
Date: Thu, 15 Apr 2010 03:31:00 -0000	[thread overview]
Message-ID: <bug-43756-19035@http.gcc.gnu.org/bugzilla/> (raw)

I ran my demo code from bug id #43755 on a 32bit host for fun. All the casting
i could dream up for the value of ~0 << 32 resulted in a value of 0 when using
constants. However when using a variable to upshift by 32, I get the result ~0
(4294967295). I'm stumped.


-- 
           Summary: Bit shifitng by a constant 32 isn't the same as
                    bitshifting by a variable 32.
           Product: gcc
           Version: 4.4.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mail dot alexhaase at gmail dot com
 GCC build triplet: i486-linux-gnu
  GCC host triplet: i486-linux-gnu
GCC target triplet: i486-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43756


             reply	other threads:[~2010-04-15  3:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-15  3:31 mail dot alexhaase at gmail dot com [this message]
2010-04-15  3:32 ` [Bug c/43756] " mail dot alexhaase at gmail dot com
2010-04-15  9:27 ` rguenth at gcc dot gnu dot org

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