linux-kernel - Re: [PATCH 1/1] vsprintf: optimize decimal conversion (again)

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Message-ID: <4F7138B0.8030100@zytor.com>
Date:	Mon, 26 Mar 2012 20:49:04 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Denys Vlasenko <vda.linux@...glemail.com>
CC:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Douglas W Jones <jones@...uiowa.edu>,
	Michal Nazarewicz <mnazarewicz@...gle.com>
Subject: Re: [PATCH 1/1] vsprintf: optimize decimal conversion (again)

On 03/26/2012 04:18 PM, Denys Vlasenko wrote:
> Only 64-bit machines will perform 64-bit
> division, one per 9 decimal digits (thus, at most three divisions
> per one long_long->string conversion).

FWIW, gcc supports 128-bit integers on 64-bit platforms using the
__int128 keyword.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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