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* [Bug ada/29462] New: Sign ignored on fixed point multiplication
@ 2006-10-13 17:43 dewi dot daniels at silver-software dot com
2006-10-13 21:34 ` [Bug ada/29462] " laurent at guerby dot net
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: dewi dot daniels at silver-software dot com @ 2006-10-13 17:43 UTC (permalink / raw)
To: gcc-bugs
The sign seems to be ignored when multiplying a named number with a fixed point
value. Converting the named number to a fixed point type seems to work around
the problem. See the example below:
with Ada.Text_IO;
procedure Test
is
type T is delta 0.1 range -1.0 .. 1.0;
X : constant := -1.0;
Y : T;
package T_IO is new Ada.Text_IO.Fixed_IO (T);
begin
Ada.Text_IO.Put ("X = "); T_IO.Put (X); Ada.Text_IO.New_Line;
Y := -1.0;
Ada.Text_IO.Put ("Y = "); T_IO.Put (Y); Ada.Text_IO.New_Line;
Ada.Text_IO.Put ("X * Y = "); T_IO.Put (X * Y); Ada.Text_IO.New_Line;
Ada.Text_IO.Put ("T (X) * Y = "); T_IO.Put (T (X) * Y);
Ada.Text_IO.New_Line;
end Test;
--
Summary: Sign ignored on fixed point multiplication
Product: gcc
Version: 3.4.5
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: dewi dot daniels at silver-software dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29462
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug ada/29462] Sign ignored on fixed point multiplication 2006-10-13 17:43 [Bug ada/29462] New: Sign ignored on fixed point multiplication dewi dot daniels at silver-software dot com @ 2006-10-13 21:34 ` laurent at guerby dot net 2007-05-02 12:21 ` charlet at gcc dot gnu dot org 2007-05-02 14:48 ` dewi dot daniels at silver-software dot com 2 siblings, 0 replies; 4+ messages in thread From: laurent at guerby dot net @ 2006-10-13 21:34 UTC (permalink / raw) To: gcc-bugs ------- Comment #1 from laurent at guerby dot net 2006-10-13 21:34 ------- Confirmed with gcc version 4.2.0 20060922 (experimental) $ gnatmake test $ ./test X = -1.0 Y = -1.0 X * Y = -1.0 T (X) * Y = 1.0 -- laurent at guerby dot net changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever Confirmed|0 |1 Keywords| |wrong-code Last reconfirmed|0000-00-00 00:00:00 |2006-10-13 21:34:24 date| | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29462 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ada/29462] Sign ignored on fixed point multiplication 2006-10-13 17:43 [Bug ada/29462] New: Sign ignored on fixed point multiplication dewi dot daniels at silver-software dot com 2006-10-13 21:34 ` [Bug ada/29462] " laurent at guerby dot net @ 2007-05-02 12:21 ` charlet at gcc dot gnu dot org 2007-05-02 14:48 ` dewi dot daniels at silver-software dot com 2 siblings, 0 replies; 4+ messages in thread From: charlet at gcc dot gnu dot org @ 2007-05-02 12:21 UTC (permalink / raw) To: gcc-bugs ------- Comment #2 from charlet at gcc dot gnu dot org 2007-05-02 13:20 ------- I get the following on trunk, which I assume is the expected output: $ ./test X = -1.0 Y = -1.0 X * Y = 1.0 T (X) * Y = 1.0 -- charlet at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED Target Milestone|--- |4.3.0 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29462 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug ada/29462] Sign ignored on fixed point multiplication 2006-10-13 17:43 [Bug ada/29462] New: Sign ignored on fixed point multiplication dewi dot daniels at silver-software dot com 2006-10-13 21:34 ` [Bug ada/29462] " laurent at guerby dot net 2007-05-02 12:21 ` charlet at gcc dot gnu dot org @ 2007-05-02 14:48 ` dewi dot daniels at silver-software dot com 2 siblings, 0 replies; 4+ messages in thread From: dewi dot daniels at silver-software dot com @ 2007-05-02 14:48 UTC (permalink / raw) To: gcc-bugs ------- Comment #3 from dewi dot daniels at silver-software dot com 2007-05-02 15:48 ------- Subject: RE: Sign ignored on fixed point multiplication Yes, that output looks correct to me :) > -----Original Message----- > From: charlet at gcc dot gnu dot org > [mailto:gcc-bugzilla@gcc.gnu.org] > Sent: 02 May 2007 13:21 > To: dewi.daniels@silver-software.com > Subject: [Bug ada/29462] Sign ignored on fixed point multiplication > > > > > ------- Comment #2 from charlet at gcc dot gnu dot org > 2007-05-02 13:20 ------- I get the following on trunk, which > I assume is the expected output: > > $ ./test > X = -1.0 > Y = -1.0 > X * Y = 1.0 > T (X) * Y = 1.0 > > > -- > > charlet at gcc dot gnu dot org changed: > > What |Removed |Added > -------------------------------------------------------------- > -------------- > Status|NEW |RESOLVED > Resolution| |FIXED > Target Milestone|--- |4.3.0 > > > http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29462 > > ------- You are receiving this mail because: ------- > You reported the bug, or are watching the reporter. > -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29462 ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-05-02 14:48 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2006-10-13 17:43 [Bug ada/29462] New: Sign ignored on fixed point multiplication dewi dot daniels at silver-software dot com 2006-10-13 21:34 ` [Bug ada/29462] " laurent at guerby dot net 2007-05-02 12:21 ` charlet at gcc dot gnu dot org 2007-05-02 14:48 ` dewi dot daniels at silver-software dot com
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