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Mail Archives: djgpp/2002/04/22/13:00:20

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From: Hans-Bernhard Broeker <broeker AT physik DOT rwth-aachen DOT de>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: djgpp, nasm and floats
Date: 22 Apr 2002 16:51:49 GMT
Organization: Aachen University of Technology (RWTH)
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R. Grela <rgrela AT ciudad DOT com DOT ar> wrote:

> extern "C" float atest();
> void main() { float f = atest();  cout << f << endl; }

You had best execute a little test compilation to investigate what
the DJGPP C calling convention says about returning floats or doubles
from a function.  I.e.: write a little example in C, and 'gcc -S' it
to see what the parameter passing looks like:

The example source could be atest.c:

float atest(float a) {
    return a+5;
|

Using "gcc -S" on this will then give you (AT&T style) assembly code
in atest.s that you can inspect.
-- 
Hans-Bernhard Broeker (broeker AT physik DOT rwth-aachen DOT de)
Even if all the snow were burnt, ashes would remain.

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