RFA: correct size of long double on PPC Linux

[Daniel Jacobowitz]

On Thu, Mar 25, 2004 at 10:23:58PM -0700, Kevin Buettner wrote:
> On 24 Mar 2004 13:10:33 -0500
> Jim Blandy <jimb@redhat.com> wrote:
> 
> > 2004-03-24  Jim Blandy  <jimb@redhat.com>
> > 
> > 	* ppc-linux-tdep.c (ppc_linux_init_abi): Long doubles are eight
> > 	bytes long on PPC Linux.
> 
> Can you provide the ABI reference for this?
> 
> According to the documentation that I have (which is the System V ABI
> PowerPC Processor Supplement), the size of a long double is 16 bytes.

Yes - this is one of the known warts in the PPC GNU/Linux ABI.  People
have been talking for years about fixing it to match the SysV ABI.  GCC
only recently got 128-bit long double support on PPC, so it may be
changing soon; but for all existing PPC GNU/Linux systems I know of,
eight bytes is correct.

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer