Messages in this thread | | | Date | Tue, 25 Aug 1998 18:23:40 +0200 (METDST) | From | Gabriel Paubert <> | Subject | Re: [PATCH] 498+ days uptime |
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On Tue, 25 Aug 1998, Jamie Lokier wrote:
> Incrementing a 64-bit value on i386 is fast and simple. It's arithmetic > done in GCC, especially with temporaries that you have to worry about. > > The instruction sequence is: > > incl counter > adcl $0,counter+4
Wrong, inc[bwl] and dec[bwl] don't affect the carry flag. You have to use addl $1,counter (it's only 1 byte longer so nobody really cares).
Gabriel.
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