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From: tonya@aban.ece.ubc.ca (Tony R. Ambardar)
Subject: Re: How to modify Standard types in GNAT-3.11?
Date: 1999/02/19
Message-ID: <7ainnj$6ae$1@nntp.ucs.ubc.ca>#1/1
X-Deja-AN: 445943659
References: <7afo84$fgm$1@nntp.ucs.ubc.ca> <uiuczpcyy.fsf@gsfc.nasa.gov>
 <7aijsf$j39$1@nnrp1.dejanews.com>
Organization: The University of British Columbia
Newsgroups: comp.lang.ada
Date: 1999-02-19T00:00:00+00:00
List-Id: <comp.lang.ada>

robert_dewar@my-dejanews.com wrote:
: Bad idea! Stephen, I guess you are not that familiar with
: the GNAT run-time library. Long_Long_Float is used in many
: many units, and indeed the expected thing is that it be
: equivalent to Long_Float if IEEE extended is not supported.
: Even doing this equivalence is not so easy!

I noticed this pervasive use of Long_Long_Float early on, and ended up
spending a fair bit of time looking through the RTS code for the
Right Way. I've gotten everything to work (so far) by doing the
following:

1. Modifying all the IEEEX_ attributes to be the same as the IEEEL_
attributes in Ttypef.ads.

2. Defining LONG_DOUBLE_TYPE_SIZE to be 64 in my GCC target include file,
config/i386/rtems.h

This finally allows me to use GNAT/RTEMS with software floating-point.

Does this sound right you, Robert? I suspect there's a cleaner way to
do this, or perhaps there's something I've forgotten...

Thanks for your feedback.
--
  ____________________________________________________________
 /                                                            \
| Tony R. Ambardar         |   Department of Electrical &      |
| M.Eng. Student           |   Computer Engineering            | 
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