From: Andrew Haley <aph@cambridge.redhat.com>
To: "Boehm, Hans" <hans_boehm@hp.com>
Cc: "'java@gcc.gnu.org'" <java@gcc.gnu.org>,
"'tromey@redhat.com'" <tromey@redhat.com>
Subject: Problem with interpreted double operations on IA64
Date: Tue, 09 Apr 2002 09:43:00 -0000 [thread overview]
Message-ID: <15539.6328.389743.798857@cuddles.cambridge.redhat.com> (raw)
In-Reply-To: <40700B4C02ABD5119F000090278766443BF19D@hplex1.hpl.hp.com>
Boehm, Hans writes:
> Could someone point me at a description of exactly how type __java_double
> should differ from double? As far as I can tell, __java_double is used
> primarily by the interpreter? On X86 this seems to work correctly. On IA64
> (and perhaps other 64-bit platforms?), it seems to get confused about the
> low order bits. This means that "double precision" results in the
> interpreter are computed at most to single precision accuracy. Here's a C++
> example to demonstrate the issue. Gij runs into the same problems, causing
> scimark to fail, etc. (This is with a very recent 3.1 tree.)
Weird. Could you please run gcc with '-save-temps -dD' and let us
have the double.ii file you get?
Andrew.
next prev parent reply other threads:[~2002-04-09 16:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-09 9:37 Boehm, Hans
2002-04-09 9:43 ` Andrew Haley [this message]
2002-04-09 10:51 ` Tom Tromey
2002-04-09 9:43 Boehm, Hans
2002-04-09 10:01 ` Andrew Haley
2002-04-09 10:30 ` Per Bothner
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