From: Matthew Veety <mveety@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] arm compiler bug
Date: Wed, 2 Jan 2013 13:32:05 -0500 [thread overview]
Message-ID: <391C754D-FA39-48FA-B2CF-079FAA8B0ADF@gmail.com> (raw)
In-Reply-To: <1306b366fc14378754e4d10a993cce67@rei2.9hal>
Is this related to the bug I found in python on arm?
On Jan 2, 2013, at 4:05, cinap_lenrek@gmx.de wrote:
> 0 < -0x80000000 == 1 with 5c.
>
> the problem is caused by this:
>
> if(a == ACMP && f1->op == OCONST && p->from.offset < 0) {
> p->as = ACMN;
> p->from.offset = -p->from.offset;
> }
>
> because 0x80000000 == -0x80000000
>
> adding the following check to that if expression fixes it:
>
> && p->from.offset != -p->from.offset
>
> silly python code.
>
> --
> cinap
>
next prev parent reply other threads:[~2013-01-02 18:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-02 9:05 cinap_lenrek
2013-01-02 9:26 ` Richard Miller
2013-01-02 15:07 ` erik quanstrom
2013-01-02 15:53 ` Charles Forsyth
2013-01-02 15:55 ` Charles Forsyth
2013-01-02 18:32 ` Matthew Veety [this message]
2013-01-02 18:34 ` erik quanstrom
2013-01-02 20:16 ` cinap_lenrek
2013-01-02 20:11 ` cinap_lenrek
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