[rfa/i387] Eliminate HOST_*_FORMAT from i387-tdep.c

[Andrew Cagney <ac131313@cygnus.com>]

Hello,

Very similar to my ARM tweek, this patch replaces a use of 
HOST_LONG_DOUBLE_FORMAT with more generic code.

There isn't a loss of precision since extract_floating() on i386 native 
should still do a memcopy().

	Andrew

(Disclaimers about testing apply, it does compile :-/ ).
From ac131313@cygnus.com Fri Jun 29 10:23:00 2001
From: Andrew Cagney <ac131313@cygnus.com>
To: gdb-patches@sources.redhat.com
Subject: [rfc/rfa] Almost eliminate HOST_{FLOAT,DOUBLE,...}_FORMAT
Date: Fri, 29 Jun 2001 10:23:00 -0000
Message-id: <3B3CB989.1000706@cygnus.com>
X-SW-Source: 2001-06/msg00531.html
Content-length: 788

Hello,

Attached is a revised patch to defs.h and findvar.c to reduce the 
dependency on host floating point formats.

This patch changes GDB so that, if the host configury didn't specify the 
floating point format, it will fall back immediatly to floatformat_*(). 
  Previously, GDB would assume that the HOST had IEEE FP and try to use 
that.

For hosts that don't specify a HOST_*_FORMAT, this will mean a loss of 
FP precision when using GDB :-/

As an accidental side effect, this eliminates the problem where, if the 
the host/target both forgot to specify their long-double format/size, 
the code would assume that they were identical and do really bizare things.

	Andrew

PS: If you haven't figured it out, I'm tring to eliminate xm.h and 
(gasp) nm.h for at least one platform.
From ac131313@cygnus.com Fri Jun 29 10:51:00 2001
From: Andrew Cagney <ac131313@cygnus.com>
To: gdb-patches@sources.redhat.com
Subject: [rfa] NetBSD/PowerPC doesn't need xm.h
Date: Fri, 29 Jun 2001 10:51:00 -0000
Message-id: <3B3CC000.7040700@cygnus.com>
X-SW-Source: 2001-06/msg00532.html
Content-length: 375

Hello,

Assuming that the other patches are accepted, this patch removes xm.h 
from the NetBSD/PowerPC host configuration.

This is probably a good host/target to work with since it isn't 
mainstream and consequently won't hurt anything like the more important 
GNU systems.

Ok?
	Andrew

PS: There are several follow-on's to this - HOST_BYTE_ORDER can also be 
eliminated.