Path: utzoo!utgpu!cs.utexas.edu!uwm.edu!wuarchive!m.cs.uiuc.edu!ux1.cso.uiuc.edu!cs326ag
From: cs326ag@ux1.cso.uiuc.edu (Loren J. Rittle)
Newsgroups: alt.sources.amiga
Subject: Re: OS friendly assembly source examples
Message-ID: <1991Apr30.213936.22878@ux1.cso.uiuc.edu>
Date: 30 Apr 91 21:39:36 GMT
Organization: University of Illinois at Urbana
Lines: 59

In article <mykes.2042@amiga0.SF-Bay.ORG>
Mike (compilers suck :-) Schwartz (mykes@amiga0.SF-Bay.ORG) writes:
>The second program is the ol' printf("Hello, world\n")
>program done in assembly.  I didn't comment the program
>at all (who comments such a program :) and did not try
>to squeeze it down as small as possible.  I've never
>seen a 'C' compiler even come close to 20 or 30 times
>this executable size :)

Well, you are now:

Use `lc -. -v -cus hello.c >nil:' [-O does't help ;-]
    `blink from hello.o nd quiet'
with SAS/C v5.0a (with 2.0 includes) to get an executable that is
124 bytes long...  ...which is smaller than Mike's hand coded 180. :-)
This may suprise a guy like Mike. :-)
And, boy is the source more readable... :-)
[Mike this was meant in good fun - ljr ;-]

All joking aside, I hope everyone enjoys the `good', as in system
friendly, asm code Mike posted.  But don't use Mike's `size' statements
as a good reason to code in asm instead of C!  Thanks Mike!

Sincerely,
Loren

----- cut here (hello.c) -----
// Hello world in non-portable C
// [non-portable because we call AmigaOS functions directly instead of
//  using the ANSI library and we use those snazzy C++ style comments. ;-]
//
// Programmed by Loren J. Rittle in more than 1 minute (but that is all it
// would take next time :-).
//
// compiles and links into a 124 byte executable (62 byte codesize)
// in .733 seconds (yes, Mike, I changed the time; that's all it took).
//

#include <pragmas/exec_pragmas.h>
#include <pragmas/dos_pragmas.h>

void hello (void)
{
  struct ExecBase *SysBase = *((struct ExecBase **) (4));
  struct DosLibrary *DOSBase;

  DOSBase = (struct DosLibrary *) OpenLibrary ("dos.library", 0);
  if (DOSBase)
    {
      Write (Output (), "Hello, world\n", 13);
      CloseLibrary ((struct Libaray *)DOSBase);
    }
}
----- cut line (end of hello.c) -----
-- 
``NewTek stated that the Toaster  *would*  *not*  be made to directly support
  the Mac, at this point Sculley stormed out of the booth...'' --- A scene at
  the recent MacExpo.  Gee, you wouldn't think that an Apple Exec would be so
  worried about one little Amiga device... Loren J. Rittle  l-rittle@uiuc.edu