From: D DOT J DOT Eleveld AT anest DOT azg DOT nl
Newsgroups: comp.os.msdos.djgpp
Subject: Is there a memcpy that takes a segment/selector?
Date: Wed, 23 Sep 1998 14:20:47 GMT
Organization: Deja News - The Leader in Internet Discussion
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To: djgpp AT delorie DOT com
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Hello Everyone,

I'm playing with some blitting functions for the AllegTTF library and I've
gotten some code that i (think) can be sped up, but i'm not sure how.  The
inner loop for 8 bit blitting function looks like this.

_farsetsel(dest->seg);
... do some start and and end and address calculations ...
while(start<end)
  _farnspokeb(address++, *start++);

Since this only moves bytes, I assume that it could be faster if I moved
shorts and words.  I though that the built in functions like memcpy copy
words if I can but memcpy doesn't use far pointers like I do here.  I looked
through my info files for memcpy and copy but didn't find anything that did
what I want i.e. a memcpy function that copies bytes/shorts/words and I can
give a segment to. Does anyone know a way to do this fast?  I'd really like
to avoid assembler if I could..

Doug Eleveld


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