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From: Mark H Weaver <mhw@netris.org>
To: "Göran Weinholt" <goran@weinholt.se>
Cc: 14864-done@debbugs.gnu.org
Subject: bug#14864: bitwise-arithmetic-shift-right is wrong for large shift amounts
Date: Sun, 14 Jul 2013 14:54:24 -0400	[thread overview]
Message-ID: <87hafx55wf.fsf@tines.lan> (raw)
In-Reply-To: <87a9lpdsyw.fsf@industria.weinholt.se> ("Göran Weinholt"'s message of "Sun, 14 Jul 2013 18:08:55 +0200")

Göran Weinholt <goran@weinholt.se> writes:

> bitwise-arithmetic-shift-right from (rnrs) is wrong for ridiculously
> large shift amounts:
>
> scheme@(guile-user)> (import (rnrs))
> scheme@(guile-user)> (bitwise-arithmetic-shift-right -2 (+ (greatest-fixnum) 1))
> $1 = -2
>
> The correct result is -1.

Thanks for the report.  Now fixed in stable-2.0.

http://git.savannah.gnu.org/gitweb/?p=guile.git;a=commitdiff;h=7e8166f5bdb526c021c826943aaf050134cccc83

    Mark





      reply	other threads:[~2013-07-14 18:54 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-07-14 16:08 bug#14864: bitwise-arithmetic-shift-right is wrong for large shift amounts Göran Weinholt
2013-07-14 18:54 ` Mark H Weaver [this message]

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