From: Denis Zaitsev <zzz@anda.ru>
To: gcc@gcc.gnu.org
Cc: linux-gcc@vger.kernel.org
Subject: x86 D flag: what's its status thru the program?
Date: Sun, 4 Jul 2004 21:37:48 +0600 [thread overview]
Message-ID: <20040704213748.A796@natasha.ward.six> (raw)
Is this Direction flag (for the movs instructions) has some assumed
value (say, as after cld)? I ask because the many program sources
show interesting behaviour: from one side, this flag is always set
before the string insns (cld or std), but from the other side, if the
programs does std then it always does cld after. So, nobody leaves it
set, but nevertheless, everybody set it clear. Why?
next reply other threads:[~2004-07-04 15:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-04 15:37 Denis Zaitsev [this message]
2004-07-05 13:23 ` x86 D flag: what's its status thru the program? Lukasz Michal Rak
2004-07-05 16:26 ` Denis Zaitsev
2004-07-05 17:19 ` Lukasz Michal Rak
2004-07-05 19:04 ` Denis Zaitsev
2004-07-06 14:05 ` Lukasz Michal Rak
2004-07-07 0:32 ` Jim Wilson
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