Re: What is wrong with Bugzilla? [Was: Re: GCC and Floating-Point]

[Mike Stump <mrs at apple dot com>]

On May 31, 2005, at 10:25 AM, Vincent Lefevre wrote:
> Well, there is no extended precision with GCC under Linux/PPC.

Hum, I do wonder about even that; why do:

2004-02-07  Alan Modra  <amodra@bigpond.net.au>

        * config/rs6000/t-linux64 (LIB2FUNCS_EXTRA): Add darwin- 
ldouble.c.

powerpc64-*-linux*)
        tm_file="${tm_file} dbxelf.h elfos.h svr4.h freebsd-spec.h  
rs6000/sysv4.h"
        test x$with_cpu != x || cpu_is_64bit=yes
        test x$cpu_is_64bit != xyes || tm_file="${tm_file} rs6000/ 
default64.h"
        tm_file="rs6000/biarch64.h ${tm_file} rs6000/linux64.h"
        extra_options="${extra_options} rs6000/sysv4.opt rs6000/ 
linux64.opt"
        tmake_file="rs6000/t-fprules ${tmake_file} rs6000/t-ppccomm  
rs6000/t-linux64"

t-linux64:

LIB2FUNCS_EXTRA = tramp.S $(srcdir)/config/rs6000/ppc64-fp.c \
        $(srcdir)/config/rs6000/darwin-ldouble.c

darwin-ldouble.c:
/* 128-bit long double support routines for Darwin.

then?  Certainly, the intent was to push it closer to working.  I  
don't see why someone could not finish off the compiler bits fairly  
quickly, if they wanted to.

> And according to
> http://developer.apple.com/documentation/mac/PPCNumerics/ 
> PPCNumerics-14.html
> (found with Google), the PowerPC doesn't have hardware support
> for extended precision.

I don't see the relevance, not to the question of can long double be  
used under linux, nor even can long double be used under OSX, nor  
long double on ppc.