From:	"Andrew Davidson" <andrew AT lemure DOT freeserve DOT co DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Fixed or forbidden register spilled error (bloody inline asm cocking up again)
Date:	Mon, 29 Mar 1999 11:31:33 +0100
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

I'm having a neat little problem with a teeny little bit of inline
assembler. The line goes like this:

 asm (
 "call %%esi\n"
   : "=a" (regpcaf), "=b" (regiyhl), "=c" (regixbc), "=d" (regspde)
   : "a" (regpcaf),"b" (regiyhl), "c" (regixbc), "d" (regspde), "S"
(cpuid->scratchmem), "D" (cpuid->cpumem)
   : "%eax", "%ebx", "%ecx", "%edx", "%esi", "%edi"
   );

(all the reg...s are #defines but fear not, they all work perfectly).

Now that USED to compile... however, after a bit of code tweaking I get the
following error
message:

Error: fixed or forbidden register was spilled.
This may be due to a compiler bug or to impossible asm
statements or clauses.

Which is frankly crap. If I remove ANY of the arguments on the 'inputs' line
of the asm
statements it compiles (and executes) fine. So what am I doing wrong? Is
this really a bug in
DJGPP? I'm pretty sure it's all my fault as I really haven't got the hang of
the asm() function.

Thanks for any help,
Andrew

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