Date: Sun, 26 Aug 2001 23:09:58 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Valentin Nechayev <netch@iv.nn.kiev.ua> Cc: Steve Roome <stephen_roome@yahoo.com>, freebsd-hackers@FreeBSD.ORG, "David O'Brien" <obrien@FreeBSD.ORG> Subject: Re: function calls/rets in assembly Message-ID: <XFMail.010826230958.jhb@FreeBSD.org> In-Reply-To: <20010825154427.B761@iv.nn.kiev.ua>
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On 25-Aug-01 Valentin Nechayev wrote: > Well, unnesesary stack pointer shiftings disappeared. > After calling with additional -O1: > > printasint: > pushl %ebp > movl %esp,%ebp > pushl 8(%ebp) > pushl $.LC0 > call printf > leave > ret > > You can simply see that this assembly output is fully identical > to one you requested. > > Well, now you should add wanted options to /etc/make.conf and avoid > seeing of such nightmares. Erm, the original topic of this dicussion was about attempting to use the assembly from the C compiler to see how things work when writing one's own assembly functions. Having to know magical extra parameters to pass to the compiler to make this a fruitful exercise doesn't help. If the compiler were more intelligent about the code it output by default in the first place, then that would help. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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