From: viktor DOT lundstrom AT mailbox DOT swipnet DOT se (Viktor Lundstrom)
Newsgroups: comp.os.msdos.djgpp
Subject: ok with negative values in inline asm?
Date: Sun, 24 May 1998 16:16:03 GMT
Organization: A customer of Tele2
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I want to either subtract or add 1 to 32-bit register. 
Would this decrease whatever is in %%edi with 1? :
asm ("movb $-1, %%ah
          addl %%ah, %%edi"
	:
	:
	:"%eax", "%edi");

Or do I have to use a 32bit register (ie. replacing ah with for
example ebx)?