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Date: Thu, 19 May 2005 04:52:00 -0000
From: Richard Henderson <rth@redhat.com>
To: Joel Brobecker <brobecker@adacore.com>
Cc: gdb-patches@sources.redhat.com
Subject: Re: Question: Checking register value in buffer
Message-ID: <20050519032551.GA8299@redhat.com>
References: <20050519020443.GP1462@adacore.com> <20050519022256.GA8204@redhat.com> <20050519024857.GY12565@adacore.com> <20050519030349.GA8255@redhat.com> <20050519032332.GZ12565@adacore.com>
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On Thu, May 19, 2005 at 01:23:32PM +1000, Joel Brobecker wrote:
> >   sign = (LONGEST)1 << 63
> >   zero = sign - 1;
> 
> Isn't this assument that LONGEST is exactly 64 bits?

No.  Since you're extracting a signed 8-byte int, the bits
above 63 will all be replicas of bit 63.


r~