From: Hans-Peter Nilsson <hans-peter.nilsson@axis.com>
To: dje@transmeta.com
Cc: hans-peter.nilsson@axis.com, cgen@sources.redhat.com
Subject: Re: [RFA:] Fix lsb? bug with insn fields beyond base insn size.
Date: Mon, 24 Jun 2002 09:05:00 -0000 [thread overview]
Message-ID: <200206241605.SAA20094@ignucius.axis.se> (raw)
In-Reply-To: <15639.14387.11726.547375@casey.transmeta.com> (message from Doug Evans on Mon, 24 Jun 2002 08:18:11 -0700 (PDT))
> From: Doug Evans <dje@transmeta.com>
> Date: Mon, 24 Jun 2002 08:18:11 -0700 (PDT)
> Hans-Peter Nilsson writes:
> > The highest bit-number minus the lowest bit-number is the
> > number of bits less one.
>
> Assuming one defines the field to be [low,high].
> Another legitimate definition, within a localized context such
> as intermediates used to produce some final result, is [low,high).
> I'm sure there are other contexts where such a definition is legitimate.
Ok, the comment above field-high and field-low needs expansion,
since "canonicalize on the low and high numbered ends of the
field; use the lsb?-adjusted numbering only when necessary" is
ambiguous, opening up to such off-by-one interpretation. Never
mind, as mentioned I'll send a new patch.
brgds, H-P
prev parent reply other threads:[~2002-06-24 16:05 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-18 18:11 Hans-Peter Nilsson
2002-06-19 11:05 ` Doug Evans
2002-06-24 8:24 ` Hans-Peter Nilsson
2002-06-21 11:59 ` Doug Evans
2002-06-24 7:59 ` Hans-Peter Nilsson
2002-06-21 12:13 ` Doug Evans
2002-06-24 8:00 ` Hans-Peter Nilsson
2002-06-21 13:54 ` Doug Evans
2002-06-24 8:11 ` Hans-Peter Nilsson
2002-06-24 8:18 ` Doug Evans
2002-06-24 9:05 ` Hans-Peter Nilsson [this message]
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