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Re: -32768 [message #88129 is a reply to message #88127]

Fri, 21 March 2014 12:55

Lajos Foldy
Messages: 176
Registered: December 2011

Senior Member

On Friday, March 21, 2014 7:39:45 PM UTC+1, Yngvar Larsen wrote:

>> The C standard guarantees modulo 2^N arithmetic for unsigned integers only. For signed integers, the behavior is undefined.
>
> Thanks for the info! I didn't know that. Fortunately, I haven't had to do much numerical work in C lately.
>
> Do you by any chance know the rationale behind that?

Optimization. There is an excellent blog post about undefined behavior at:

http://blog.llvm.org/2011/05/what-every-c-programmer-should- know.html

regards,
Lajos

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[Message index]

		-32768 By: greg.addr on Tue, 18 March 2014 21:43
		Re: -32768 By: skymaxwell@gmail.com on Tue, 18 March 2014 22:02
		Re: -32768 By: Craig Markwardt on Wed, 19 March 2014 12:17
		Re: -32768 By: Rob Klooster on Thu, 20 March 2014 02:24
		Re: -32768 By: Karl[1] on Thu, 20 March 2014 10:01
		Re: -32768 By: Jim Pendleton on Thu, 20 March 2014 14:11
		Re: -32768 By: Yngvar Larsen on Thu, 20 March 2014 14:30
		Re: -32768 By: chris_torrence@NOSPAM on Thu, 20 March 2014 16:44
		Re: -32768 By: Yngvar Larsen on Fri, 21 March 2014 11:02
		Re: -32768 By: Yngvar Larsen on Fri, 21 March 2014 11:04
		Re: -32768 By: Lajos Foldy on Fri, 21 March 2014 11:16
		Re: -32768 By: Yngvar Larsen on Fri, 21 March 2014 11:39
		Re: -32768 By: Lajos Foldy on Fri, 21 March 2014 12:55
		Re: -32768 By: Dick Jackson on Sat, 22 March 2014 13:20
		Re: -32768 By: Lajos Foldy on Sat, 22 March 2014 13:58
		Re: -32768 By: Dick Jackson on Sat, 22 March 2014 16:56

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