From: Mateusz Marzantowicz <mateuszm@server.pl>
To: linux-assembly@vger.kernel.org
Subject: Re: GCC Optimization?
Date: Tue, 23 Nov 2004 17:43:26 +0100 [thread overview]
Message-ID: <41A368AE.8020407@server.pl> (raw)
In-Reply-To: <2462.1101169594@www25.gmx.net>
> Second question:
> What does mov $0x0,%eax? Why dont they use xor %eax and what is it good for?
>
It's because GCC was designed for more processors than only x86 based
and in some cases it won't work. With optimization enabled you will find
there xorl %eax, %eax instead of mov $0x0,%ea
Regards
next prev parent reply other threads:[~2004-11-23 16:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-23 0:26 GCC Optimization? asmfreshmeat
2004-11-23 1:06 ` Brian Raiter
2004-11-23 16:43 ` Mateusz Marzantowicz [this message]
-- strict thread matches above, loose matches on Subject: below --
2004-11-23 9:22 an0nym
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