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
Date: Thu, 19 May 2005 03:23:00 -0000 [thread overview]
Message-ID: <20050519030349.GA8255@redhat.com> (raw)
In-Reply-To: <20050519024857.GY12565@adacore.com>
On Thu, May 19, 2005 at 12:48:57PM +1000, Joel Brobecker wrote:
> In terms of computing the mask, I'm thinking of using something
> like this:
>
> sign_mask = 1 << (sizeof (rav) * TARGET_CHAR_BIT - 1);
This confuses host and target notions. You would have wanted
the *host* CHAR_BIT, since you're using the host sizeof.
> zero_mask = sign_mask ^ -1;
This fails if rav is *wider* than 64-bits.
> Are there better ways of computing these masks?
How about just
sign = (LONGEST)1 << 63
zero = sign - 1;
r~
next prev parent reply other threads:[~2005-05-19 3:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-19 2:49 Joel Brobecker
2005-05-19 3:03 ` Richard Henderson
2005-05-19 3:07 ` Joel Brobecker
2005-05-19 3:23 ` Richard Henderson [this message]
2005-05-19 3:33 ` Joel Brobecker
2005-05-19 4:52 ` Richard Henderson
2005-05-19 5:37 ` Daniel Jacobowitz
2005-05-19 3:26 ` Daniel Jacobowitz
2005-05-19 16:41 ` Andrew Cagney
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