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From: "Joel Saunders" <jbs30000 AT aol DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Ok, I understand.  The only reason I was asking about
Date: Sat, 9 Feb 2002 03:45:46 +0000 (UTC)
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

the clobber list is because the place where I got the example
http://www.delorie.com/djgpp/doc/brennan/brennan_att_inline_djgpp.html
had
#define rep_movsl(src, dest, numwords) \
__asm__ __volatile__ ( \
  "cld\n\t" \
  "rep\n\t" \
  "movsl" \
  : : "S" (src), "D" (dest), "c" (numwords) \
  : "%ecx", "%esi", "%edi" )

Helpful Hint: If you say memcpy() with a constant length parameter, GCC
will inline it to a rep movsl like above. But if you need a variable
length version that inlines and you're always moving dwords, there ya
go.


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