From: "Doug Kwan (關振德)" <dougkwan@google.com>
To: "Andreas Schwab" <schwab@suse.de>
Cc: gcc-patches@gcc.gnu.org, "Diego Novillo" <dnovillo@google.com>,
"Kenneth Zadeck" <zadeck@naturalbridge.com>
Subject: Re: [LTO][PATCH] Fix long double precision problem
Date: Thu, 13 Dec 2007 19:13:00 -0000 [thread overview]
Message-ID: <498552560712131109r5b19f9ecif00891a4076d80ec@mail.gmail.com> (raw)
In-Reply-To: <jeve73lz0o.fsf@sykes.suse.de>
At I have mentioned earlier. That may not be a correct thing to do. On
the x86, the 80-bit extended floating point formating is stored using
one instruction and there is no internal padding. However, there is
internal padding in complex long double. Any thing expecting a
contiguous chunk of bits may be surprised.
I have done some simple testing with gdb by compiling test and
stepping them under gdb. The long double case worked but complex long
double caused gdb to crash. That was more likely that it was a bug in
gdb as gdb crashed with debug info generated from stock gcc also.
In the long term, we need an appropriate dwarf extension.
-Doug
2007/12/13, Andreas Schwab <schwab@suse.de>:
> What if the padding is internal?
>
> Andreas.
next prev parent reply other threads:[~2007-12-13 19:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-05 7:05 Doug Kwan (關振德)
2007-12-05 10:52 ` Andrew Pinski
2007-12-05 12:55 ` Kenneth Zadeck
2007-12-05 14:56 ` Diego Novillo
2007-12-05 16:28 ` Doug Kwan (關振德)
2007-12-05 19:02 ` Andrew Pinski
2007-12-05 16:34 ` Mark Mitchell
2007-12-05 18:42 ` Doug Kwan (關振德)
2007-12-05 19:01 ` Doug Kwan (關振德)
2007-12-05 23:52 ` Mark Mitchell
2007-12-11 23:15 ` Doug Kwan (關振德)
2007-12-12 9:22 ` Mark Mitchell
2007-12-12 20:23 ` Doug Kwan (關振德)
2007-12-12 20:45 ` Mark Mitchell
2007-12-13 2:27 ` Doug Kwan (關振德)
2007-12-13 11:02 ` Andreas Schwab
2007-12-13 19:13 ` Doug Kwan (關振德) [this message]
2007-12-14 9:50 ` Andreas Schwab
2007-12-14 22:18 ` Doug Kwan (關振德)
2007-12-13 20:11 ` Jim Blandy
2007-12-13 20:40 ` Doug Kwan (關振德)
2007-12-13 22:43 ` Jim Blandy
[not found] ` <4765FBC0.8020400@codesourcery.com>
2007-12-17 21:53 ` Doug Kwan (關振德)
2007-12-18 4:29 ` Mark Mitchell
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