Date: Mon, 25 May 2009 07:49:46 -0400 From: Michael Powell <nightrecon@verizon.net> To: freebsd-questions@freebsd.org Subject: Re: why integer size says 4 bytes on 64 bit processor Message-ID: <gve0hp$v9q$1@ger.gmane.org> References: <717ed9590905250355o3f3b836bm9e2e5abee03d50b2@mail.gmail.com>
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Shakil Khan wrote: > Hi All, > > Pardon me if I am writing this mail to the wrong group as I am too new to > BSD and programming stuff. You can redirect me to right group without > howling. By seeing some recent conversations(About the top status ;)) in > this group it made me nervous to ask for a silly question like this, but > it intrigued my mind too much so thought to delve into it keeping aside my > fear. > > I have a 64bit intel processor, Dual core machine and I have installed 64 > bit Linux as well as FreeBSD and thought of seeing the size of integer. On > both the platform my integer is showing 4 bytes which is 32 bit. I thought > integer are the most basic of the data types and governs the architecture > as 32 bit or 64 bit, so why integer shows me 4bytes instead of 8. Does > this means that even on 64 bit architecture we are limited to just 4GB of > RAM. > No, because INT is not the only variable type available for numerical operations. Long and Long Long are 64 bits, and utilizing these types allows for larger than 4GB RAM addressing. -Mike
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