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Re: Arithmetic Shift
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From: |
Peter Breitenlohner |
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Subject: |
Re: Arithmetic Shift |
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Date: |
Fri, 10 Dec 2010 17:20:56 +0100 (CET) |
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User-agent: |
Alpine 2.00 (LNX 1167 2008-08-23) |
On Fri, 10 Dec 2010, Paul Eggert wrote:
The usual assumption, of course, is that the compiler picks
one interpretation of >> and sticks with it. ...
Not quite true: there are at least two interpretations, one for signed and
one for unsigned variables.
.... If that is true, then "#if -1 >> 1 == -1" works, ...
Is it clear that the preprocessor must interpret -1 as signed??
Regards
Peter Breitenlohner <address@hidden>
Re: Arithmetic Shift, Ben Pfaff, 2010/12/10
Re: Arithmetic Shift, Paul Eggert, 2010/12/10
Re: Arithmetic Shift, Andrew W. Nosenko, 2010/12/11
Re: Arithmetic Shift, Paul Eggert, 2010/12/11
Re: Arithmetic Shift, Andrew W. Nosenko, 2010/12/11