Date: Fri, 11 Jul 1997 08:27:47 +0000
From: Bill Currie <billc AT blackmagic DOT tait DOT co DOT nz>
Subject: Re: odd or even # of 1's (was: no subject)
To: Christoph Kukulies <kuku AT gilberto DOT physik DOT rwth-aachen DOT de>
Cc: "Chirayu Krishnappa (chirayu AT poboxes DOT com)" <chirayu AT giasbga DOT vsnl DOT net DOT in>,
        djgpp AT delorie DOT com
Reply-to: billc AT blackmagic DOT tait DOT co DOT nz
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Organization: Tait Electronics NZ
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Christoph Kukulies wrote:
> You could do an inline assembly operation like or'ing the integer
> to itself and examine the PF (parity flag) of the EFLAGS CPU
> register afterwards, e.g. by a JPE (conditional jump short on parity even
> PF=1).

You'ld be better off using 'setpe' rather than 'jpe', as it't much less
expensive:

asm volatile("or %1,%1;setpe %b0":"=g"(result):"r"(value):"cc");

Bill
-- 
Leave others their otherness.