- To: gcc-help@xxxxxxxxxxx
- Subject: Re: GCC's -ffast-math behavior
- From: Andrew Haley <aph@xxxxxxxxxx>
- Date: Thu, 09 Feb 2012 09:21:20 +0000
- Comment: DKIM? See http://www.dkim.org
- Comment: DomainKeys? See http://antispam.yahoo.com/domainkeys
- Dkim-signature: v=1; a=rsa-sha1; c=relaxed/relaxed; d=gcc.gnu.org; s=default; x=1329384112; h=Comment: DomainKey-Signature:Received:Received:Received:Received:Received: Message-ID:Date:From:User-Agent:MIME-Version:To:Subject: References:In-Reply-To:Content-Type:Content-Transfer-Encoding: Mailing-List:Precedence:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:Sender:Delivered-To; bh=UeG8+YtaThm/f6xpWV41 Gt/jkeo=; b=a+7yZjRKfUxEcpqUiNjEeK4AQNk5mhGoyOFpyUMdyQPI0EOEsfKX 9Kjwlsa1Z9vGJZy1AXBmycwGApy9pBoumdobS5ENRp9PZqOahiG2xGzgoUkGyTyu kuDg6BUW9erktC3hCK674k7Ceg6GPsQTbKaWMQWI7hN2VSRhlYYCo1E=
- In-reply-to: <4F3384CD.7090708@gmail.com>
- User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.24) Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16
On 02/09/2012 08:33 AM, xunxun wrote:
> When using -ffast-math, gcc don't generate the math function
> symbol: U _exp
No, it doesn't. Instead gcc uses the F2XM1 instruction. Why would
you want to call a library when gcc has an instruction to do the
job?
Andrew.
[Linux C Programming]
[Linux Kernel]
[eCos]
[Fedora Development]
[Fedora Announce]
[Autoconf]
[The DWARVES Debugging Tools]
[Yosemite Campsites]
[Yosemite News]
[Linux GCC]
