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
Message-id:	<33C5EE83.1FD1@blackmagic.tait.co.nz>
Organization:	Tait Electronics NZ
MIME-version:	1.0
References:	<Pine DOT SV4 DOT 3 DOT 93 DOT 970710151909 DOT 18181A-100000 AT giasbga>
	<19970710152801 DOT 34479 AT gil DOT physik DOT rwth-aachen DOT de>

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.

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