linux-kernel - Re: [PATCH 0/1] vsprintf: optimize decimal conversion (again)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAK1hOcOJJE_iWz9w+yyrMrMSn1-kN-XErdfsxMEuyMp-o9NizA@mail.gmail.com>
Date:	Tue, 27 Mar 2012 17:32:06 +0200
From:	Denys Vlasenko <vda.linux@...glemail.com>
To:	roma1390 <roma1390@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Douglas W Jones <jones@...uiowa.edu>,
	Michal Nazarewicz <mnazarewicz@...gle.com>
Subject: Re: [PATCH 0/1] vsprintf: optimize decimal conversion (again)

On Tue, Mar 27, 2012 at 2:08 PM, roma1390 <roma1390@...il.com> wrote:
> On 2012.03.26 21:47, Denys Vlasenko wrote:
>>
>> Please find test programs attached.
>>
>> 32-bit test programs were built using gcc 4.6.2
>> 64-bit test programs were built using gcc 4.2.1
>> Command line: gcc --static [-m32] -O2 -Wall test_{org,new}.c
>
> Can't compile reference for arm:
> $ arm-linux-gnueabi-gcc -O2 -Wall test_org.c -o test_org
> test_org.c: In function ‘put_dec’:
> test_org.c:101: error: impossible constraint in ‘asm’
> test_org.c:101: error: impossible constraint in ‘asm’
> test_org.c:101: error: impossible constraint in ‘asm’

Problem is that test_header.c contains do_div() macro
copied from x86 arch.

Can you replace it with one taken from arm arch?
You can find it in arch/arm/include/asm/div64.h,
and __asmeq macro can be found in
arch/arm/include/asm/system.h.

-- 
vda


arch/arm/include/asm/div64.h
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/