From: Jonas Maebe <jonas.maebe@elis.ugent.be>
To: gdb@sourceware.org
Subject: Re: Debugger support for __float128 type?
Date: Fri, 02 Oct 2015 09:41:00 -0000 [thread overview]
Message-ID: <20151002114142.Horde.U2k-JkisJlFWDlFWvl7hOVA@mail.elis.ugent.be> (raw)
In-Reply-To: <20151001161641.3D31813CC@oc7340732750.ibm.com>
Ulrich Weigand wrote on Thu, 01 Oct 2015:
> Right, that's the current situation on PowerPC. (On Intel, long double
> is the 80-bit IEEE extended type, padded to either 12 bytes (32-bit)
> or 16 bytes (64-bit), while __float128 is IEEE quad-precision.)
A side note here: the Free Pascal Compiler supports the 80-bit
extended type stored in memory as either 10 bytes (for Turbo Pascal
and Delphi compatibility) or using the ABI-specified size (which is 16
bytes for Darwin/i386, and otherwise as you mention above).
We always output the used bytesize in the DWARF info, and in case
there are padding bytes (i.e., the non-10-byte size cases) we also
emit the DW_AT_bit_offset.
I don't know how important it is in this context, but it may be useful
to keep in mind.
Jonas
prev parent reply other threads:[~2015-10-02 9:41 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-30 17:33 Ulrich Weigand
2015-09-30 20:12 ` Joseph Myers
2015-10-01 17:23 ` Ulrich Weigand
2015-10-01 20:40 ` Joseph Myers
2015-10-02 15:18 ` Ulrich Weigand
2015-10-02 15:41 ` Joseph Myers
2015-10-02 16:01 ` Ulrich Weigand
2015-09-30 22:42 ` Mark Kettenis
2015-10-01 9:46 ` Gabriel Paubert
2015-10-01 16:16 ` Ulrich Weigand
2015-10-02 9:41 ` Jonas Maebe [this message]
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