Hi Will,

Thanks a lot for your reply. I tried -mtune=cortex-a53, no error is reported, it works.

One further question, do you have a plan to support Cortex-A57 tuning?

Thanks.

Best Regards. ------------------------------------------------------------------ Zenon Xiu （修志龙)

-----Original Message----- From: Will Newton [mailto:will.newton@linaro.org] Sent: 09 October 2013 16:51 To: Zenon Xiu Cc: linaro-toolchain@lists.linaro.org Subject: Re: Does Linaro aarch64 gcc toolchain support Cortex-A53/A57 performance tunning. Importance: High

On 9 October 2013 09:37, Zenon Xiu Zenon.Xiu@arm.com wrote:

Hi team,

In the GCC.pdf of gcc-linaro-aarch64-none-elf-4.8-2013.08, it says that -mcpu supports cortex-a53, but when I tried to build a simple hello bare metal application with -mcpu=cortex-a53 option, gcc reports,

Error: unknown cpu `cortex-a53' Error: unrecognized option -mcpu=cortex-a53

I believe this is an assembler error, as the assembler only supports these CPU types on binutils trunk. Have you tried passing -mtune=cortex-a53 instead?

-- Will Newton Toolchain Working Group, Linaro

-- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you.

ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2548782