From: Jason Stratos Papadopoulos <jasonp AT z DOT glue DOT umd DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: what does this assembler error mean?
Date: 6 Aug 2000 17:00:24 GMT
Organization: University of Maryland College Park
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To: djgpp AT delorie DOT com
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Hello. I recently upgraded my copy of DJGPP 2.7.2.1 to 2.95.2 and was
very impressed by the improvement in code quality. However, it looks like
the assembler expects different syntax now. For this compile:

gcc -O3 -march=i586 -malign-functions=4 -malign-loops=4 -malign-jumps=3
-fomit-frame-pointer -funroll-loops -fno-inline-functions  -MMD -o
helper.o -c helper.c

what does this error:

helper.c: In function `trace_putc':
helper.c:47: Invalid `asm' statement:
helper.c:47: fixed or forbidden register 0 (ax) was spilled for class AREG

mean when applied to this code?

void trace_putc(char c)
{
   asm (
      " int $0x21 "
   : 
   : "a" (0x200),"d" (c)
   : "%eax","%ebx","%ecx","%edx","%esi","%edi"  );
}

From what I understand of DJGPP inline assembly the syntax above is fine,
yet this assembler error has cropped up in two separate packages. 

Any help appreciated,
jasonp