From: ams AT ludd DOT luth DOT se (Martin Str|mberg) Newsgroups: comp.os.msdos.djgpp Subject: Re: Some assembly questions Date: 18 Mar 1999 17:45:44 GMT Organization: University of Lulea, Sweden Lines: 17 Message-ID: <7cre48$h9i$2@news.luth.se> References: <199903170746 DOT IAA06061 AT login-2 DOT eunet DOT no> <7cq156$q5$2 AT news DOT luth DOT se> <7cra9a$ui$1 AT murdoch DOT acc DOT Virginia DOT EDU> NNTP-Posting-Host: queeg.ludd.luth.se X-Newsreader: TIN [UNIX 1.3 950824BETA PL0] To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Clark L. Coleman (clc5q AT cobra DOT cs DOT Virginia DOT EDU) wrote: : Your were given a bad mnemonic: "setc" is actually "stc". : : asm volatile("clc"); /* clears (sets to 0) the carry flag */ : asm volatile("cmc"); /* complements (inverts) the carry flag */ : asm volatile("stc"); /* sets (to 1) the carry flag */ Ahh! Thanks! Perhaps somebody can inform me on the difference (if there is one) between "cmpl $1, %eax" and "testl $1, %eax". It sounds to me like they do the same thing, so I think I'm missing something... Shostakovich, String Quartet No. 15, MartinS