From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id F4035387085D; Thu,  7 May 2020 15:46:02 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org F4035387085D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1588866363;
 bh=w3Hwev/xd90Ig+1asq0YAJ0nyTdhQE1T6thOjvzuNVk=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=PJXyWsQ3JZJY9+a86nZBj6YukqMTOcpvMKbFrJlXFHc87RWkJB5UXCyUFVAWlSiLV
 YJtY+glDTJdXqjLzBnfs8zbvsKhiSTnxJsG/BhVrR7DklToZvsRGqSpFsKox8Rv5Ug
 npDFHMfAep0f/bZE33TMAYg/DF/VjBo9i+GkncAc=
From: "tony.reix at atos dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/94981] Wrong casts on Power machines dealing with fctiwuz
 instruction
Date: Thu, 07 May 2020 15:46:02 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 9.3.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: tony.reix at atos dot net
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: INVALID
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-94981-4-PQCNXGqXZu@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-94981-4@http.gcc.gnu.org/bugzilla/>
References: <bug-94981-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 07 May 2020 15:46:03 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94981

--- Comment #7 from Tony Reix <tony.reix at atos dot net> ---
(In reply to Andreas Schwab from comment #1)
> Converting a negative float to an unsigned integer is undefined.

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf says (page 43):
If the value of the integral part cannot be represented by the integer type,
the behavior is undefined.50)
50) The remaindering operation performed when a value of integer type is
converted to unsigned type need not be performed when a value of real float=
ing
type is converted to unsigned type. Thus, the range of portable real floati=
ng
values is (=E2=88=921, Utype_MAX+1).

Hummmmmmm=