[Zlib-devel] POSTINC under m68k

[Cosmin Truta]

Ok, Gunther,
I am forwarding your observation to the zlib-devel list.

If you say that the m68k family works in postinc addressing modes, then
it's probably worthwhile to use POSTINC.

I think that POSTINC should be defined in zconf.h or zutil.h, and I'd
personally prefer zutil.h. But in order to do this, we need a macro that
informs the prepreocessor about the m68k CPU. Is there any? Otherwise,
the definition of POSTINC must be put in makefiles.

Best regards,
Cosmin


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---------- Forwarded message ----------
Date: Fri, 12 Sep 2003 06:02:09 -0400
From: Gunther Nikl <gni at gecko.de>
To: Cosmin Truta <cosmin at cs.toronto.edu>
Subject: Re: zlib 1.2.0.x (fwd)

Hello Cosmin,

> I have a question about POSTINC: does it really make a difference in size?
> If there are only few extra bytes to talk about (as I would expect), then
> I think we shouldn't bother.

  The difference with GCC 3.3 is 64/68 bytes depending on the compile flags.
  Its true that there seems to be no difference in speed on my 68060 but on
  < 68060 I expect it to be a win. The m68k family has postinc addressing
  modes and thus I thought that m68k is a candidate to enable it for them.

  Gunther