From mboxrd@z Thu Jan  1 00:00:00 1970
MIME-Version: 1.0
In-Reply-To: <10afea42a3af8daf8abd3b8e8775850e@quanstro.net>
References: <10afea42a3af8daf8abd3b8e8775850e@quanstro.net>
Date: Tue,  1 Sep 2009 11:51:29 +1000
Message-ID: <775b8d190908311851t701d860av587b7433bea29fcf@mail.gmail.com>
From: Bruce Ellis <bruce.ellis@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Subject: Re: [9fans] 8c vlong bug
Topicbox-Message-UUID: 5dbd4922-ead5-11e9-9d60-3106f5b1d025

if it's my fault i'll fix it. it did screw up mod in a subtle way but
that's been fixed.

brucee

On Tue, Sep 1, 2009 at 11:47 AM, erik quanstrom<quanstro@quanstro.net> wrot=
e:
> temporarly out of time on this one. =A0it appears
> from the assembly output that 8c multiplies by
> 0 and not 1 when computing z a second time.
> nonetheless, i haven't yet seen the problem.
>
> #include <u.h>
> #include <libc.h>
>
> void
> main(void)
> {
> =A0 =A0 =A0 =A0int three, one;
> =A0 =A0 =A0 =A0uvlong twelve, z;
>
> =A0 =A0 =A0 =A0one =3D 1;
> =A0 =A0 =A0 =A0three =3D 3;
> =A0 =A0 =A0 =A0twelve =3D 12;
>
> =A0 =A0 =A0 =A0z =3D one*(twelve - three);
> =A0 =A0 =A0 =A0print("z =3D %llud\n", z);
>
> =A0 =A0 =A0 =A0z =3D (twelve - three) * one;
> =A0 =A0 =A0 =A0print("z =3D %llud\n", z);
>
> =A0 =A0 =A0 =A0exits(0);
> }
>
> output:
>
> z =3D 9
> z =3D 0
>
> - erik
>
>