From: Chong Yidong <cyd@stupidchicken.com>
To: Juri Linkov <juri@jurta.org>
Cc: 5754@debbugs.gnu.org
Subject: bug#5754: Bytecomp Arithmetic test failed
Date: Sat, 03 Apr 2010 19:31:57 -0400 [thread overview]
Message-ID: <877hoot8nm.fsf@stupidchicken.com> (raw)
In-Reply-To: <878w949lwp.fsf@mail.jurta.org> (Juri Linkov's message of "Sun, 04 Apr 2010 01:54:50 +0300")
Juri Linkov <juri@jurta.org> writes:
> Does (let ((a (expt 2 -1074)) (b 0.125)) (* a b 8))
> return 5e-324 when you compile with CFLAGS="-g -O2"?
With CFLAGS="-g -O2",
(let ((a (expt 2 -1074)) (b 0.125)) (* a b 8))
=> 5e-24
(eval '(let ((a (expt 2 -1074)) (b 0.125)) (* a 8 b)))
=> 5e-324
(funcall (byte-compile
(list 'lambda nil
(quote (let ((a (expt 2 -1074)) (b 0.125)) (* a 8 b))))))
=> 5e-24
With CFLAGS="-g",
(let ((a (expt 2 -1074)) (b 0.125)) (* a b 8))
=> 0.0
(eval '(let ((a (expt 2 -1074)) (b 0.125)) (* a 8 b)))
=> 5e-324
(funcall (byte-compile
(list 'lambda nil
(quote (let ((a (expt 2 -1074)) (b 0.125)) (* a 8 b))))))
=> 0.0
The latter two are what cause bytecomp-testsuite to fail.
next prev parent reply other threads:[~2010-04-03 23:31 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-23 7:47 bug#5754: Bytecomp Arithmetic test failed Juri Linkov
2010-03-23 8:38 ` Lennart Borgman
2010-03-23 9:03 ` Juri Linkov
2010-03-23 13:31 ` Lennart Borgman
2010-03-24 22:15 ` Chong Yidong
2010-03-24 22:52 ` Lennart Borgman
2010-03-25 1:15 ` Stefan Monnier
2010-03-25 1:19 ` Lennart Borgman
2010-03-25 7:19 ` Juri Linkov
2010-03-30 16:08 ` Juri Linkov
2010-04-03 22:18 ` Juri Linkov
2010-04-03 22:40 ` Chong Yidong
2010-04-03 22:54 ` Juri Linkov
2010-04-03 23:31 ` Chong Yidong [this message]
2010-04-04 6:25 ` Eli Zaretskii
2010-04-04 8:05 ` Andreas Schwab
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