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* Re: c/693
@ 2001-05-21 10:06 Travis Moulton
0 siblings, 0 replies; 3+ messages in thread
From: Travis Moulton @ 2001-05-21 10:06 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c/693; it has been noted by GNATS.
From: Travis Moulton <travis@mail.wm.sps.mot.com>
To: jsm28@gcc.gnu.org
Cc: gcc-gnats@gcc.gnu.org, jsm28@cam.ac.uk
Subject: Re: c/693
Date: Mon, 21 May 2001 12:58:14 -0400 (EDT)
My bad, this was a binutils bug. In Version 2.9.1, opcodes/m68k-opc.c
listed the opcodes of mulsl as being:
{"mulsw", one(0140700), one(0170700), ";wDd", m68000up|mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), ";lD1", m68020up|cpu32 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "DsD1", mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "asD1", mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "+sD1", mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "-sD1", mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "dsD1", mcf5200 },
{"mulsl", two(0046000,006000), two(0177700,0107770), ";lD3D1",m68020up|cpu32 },
When they should be
{"mulsw", one(0140700), one(0170700), ";wDd", m68000up|mcf5200 },
{"mulsl", two(0046000,004000), two(0177700,0107770), ";lD1", m68020up|cpu32 },
{"mulsl", two(0046000,004000), two(0177700,0107770), "DsD1", mcf5200 },
{"mulsl", two(0046020,004000), two(0177700,0107770), "asD1", mcf5200 },
{"mulsl", two(0046030,004000), two(0177700,0107770), "+sD1", mcf5200 },
{"mulsl", two(0046040,004000), two(0177700,0107770), "-sD1", mcf5200 },
{"mulsl", two(0046050,004000), two(0177700,0107770), "dsD1", mcf5200 },
{"mulsl", two(0046000,006000), two(0177700,0107770), ";lD3D1",m68020up|cpu32 },
^^^^^^^
...Actually, I'd guess the last one is wrong too, but it doesn't effect my
platform. I leave it to see if it has been fixed, pass along a patch,
etc.
-Travis
On 20 May 2001 jsm28@gcc.gnu.org wrote:
> Synopsis: Optimizer ignores possible zero result of an unsigned multiply
>
> State-Changed-From-To: open->feedback
> State-Changed-By: jsm28
> State-Changed-When: Sun May 20 07:31:49 2001
> State-Changed-Why:
> The attachment seems to be missing from this PR; could
> you please resubmit it?
>
> Does this problem still occur with current GCC 3.0 snapshots?
>
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=693&database=gcc
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: c/693
@ 2001-05-21 10:16 jsm28
0 siblings, 0 replies; 3+ messages in thread
From: jsm28 @ 2001-05-21 10:16 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c/693; it has been noted by GNATS.
From: jsm28@gcc.gnu.org
To: gcc-gnats@gcc.gnu.org, jsm28@cam.ac.uk, nobody@gcc.gnu.org,
travis.moulton@motorola.com
Cc:
Subject: Re: c/693
Date: 21 May 2001 17:07:49 -0000
Synopsis: Optimizer ignores possible zero result of an unsigned multiply
State-Changed-From-To: feedback->closed
State-Changed-By: jsm28
State-Changed-When: Mon May 21 10:07:49 2001
State-Changed-Why:
Submitter reports bug was in binutils not GCC.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=693&database=gcc
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: c/693
@ 2001-05-20 7:36 jsm28
0 siblings, 0 replies; 3+ messages in thread
From: jsm28 @ 2001-05-20 7:36 UTC (permalink / raw)
To: nobody; +Cc: gcc-prs
The following reply was made to PR c/693; it has been noted by GNATS.
From: jsm28@gcc.gnu.org
To: gcc-gnats@gcc.gnu.org, jsm28@cam.ac.uk, nobody@gcc.gnu.org,
travis.moulton@motorola.com
Cc:
Subject: Re: c/693
Date: 20 May 2001 14:31:49 -0000
Synopsis: Optimizer ignores possible zero result of an unsigned multiply
State-Changed-From-To: open->feedback
State-Changed-By: jsm28
State-Changed-When: Sun May 20 07:31:49 2001
State-Changed-Why:
The attachment seems to be missing from this PR; could
you please resubmit it?
Does this problem still occur with current GCC 3.0 snapshots?
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=693&database=gcc
^ permalink raw reply [flat|nested] 3+ messages in thread
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