From: "Steven J. Hill" <sjhill@realitydiluted.com>
To: linux-mips@linux-mips.org
Subject: Re: [PATCH v99,11/13] MIPS: microMIPS: Optimise 'strncpy' core library function.
Date: Tue, 07 May 2013 22:18:53 -0500 [thread overview]
Message-ID: <5189C41D.3000005@realitydiluted.com> (raw)
In-Reply-To: <518987BD.7030900@gmail.com>
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On 05/07/2013 06:01 PM, David Daney wrote:
> On 12/06/2012 09:05 PM, Steven J. Hill wrote:
>> From: "Steven J. Hill" <sjhill@mips.com>
>>
>> Optimise 'strncpy' to use microMIPS instructions and/or optimisations for
>> binary size reduction. When the microMIPS ISA is not being used, the
>> library function compiles to the original binary code.
>
> This is an untrue statement. Why mislead us by saying the original binary
> code is obtained?
>
I you are building a classic MIPS kernel, the instructions generated will be
the same even with this patch. The changes only make a difference when
building a pure microMIPS kernel.
> You don't really explain how the change helps optimization either.
>
The exercise is left to the reader. Build a microMIPS kernel yourself and
figure it out.
- -Steve
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next prev parent reply other threads:[~2013-05-08 3:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-07 5:05 [PATCH v99,00/13] Add support for pure microMIPS kernel Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,01/13] MIPS: microMIPS: Add support for microMIPS instructions Steven J. Hill
2012-12-07 7:50 ` Kevin Cernekee
2012-12-07 15:24 ` Ralf Baechle
2012-12-15 5:15 ` Hill, Steven
2012-12-07 5:05 ` [PATCH v99,02/13] MIPS: Whitespace clean-ups after microMIPS additions Steven J. Hill
2012-12-07 7:59 ` Kevin Cernekee
2012-12-07 5:05 ` [PATCH v99,03/13] MIPS: microMIPS: Floating point support for 16-bit instructions Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,04/13] MIPS: microMIPS: Add support for exception handling Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,05/13] MIPS: microMIPS: Support handling of delay slots Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,06/13] MIPS: microMIPS: Add unaligned access support Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,07/13] MIPS: microMIPS: Add vdso support Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,08/13] MIPS: microMIPS: Add configuration option for microMIPS kernel Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,09/13] MIPS: microMIPS: Work-around for assembler bug Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,10/13] MIPS: microMIPS: Optimise 'memset' core library function Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,11/13] MIPS: microMIPS: Optimise 'strncpy' " Steven J. Hill
2013-05-07 23:01 ` David Daney
2013-05-08 3:18 ` Steven J. Hill [this message]
2013-05-08 16:28 ` David Daney
2013-05-18 23:25 ` Maciej W. Rozycki
2012-12-07 5:05 ` [PATCH v99,12/13] MIPS: microMIPS: Optimise 'strlen' " Steven J. Hill
2012-12-07 5:05 ` [PATCH v99,13/13] MIPS: microMIPS: Optimise 'strnlen' " Steven J. Hill
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