Re: [arm-gnu] how to compile C code to NEON instructions

[Bob Feretich <bob.feretich@xxxxxxxxxxxxxxx>]

Yes, but the automatic vectorization is poor.
Check out the Neon Intrinsics and using inline assembly in your C programs.
The three below links should help.

http://gcc.gnu.org/onlinedocs/gcc/ARM-NEON-Intrinsics.html
http://www.delmarnorth.com/microwave/requirements/neon-test-tutorial.pdf
http://hardwarebug.org/2010/07/06/arm-inline-asm-secrets/

All of the above permits the C compiler to manage the register 
assignments. Intrinsics are optimized by the compiler, inline assembler 
is not.

To understand this level of Neon programming, you need to know the Neon 
instruction set. It is defined in the Arm Architecture Reference Manual. 
You can download a copy after your register with Arm.com.

Regards,
Bob

On 7/7/2011 7:23 PM, vandung.tran@xxxxxxxxxxxxxxxx wrote:
> Hi
>
> Is it possible to compile  C/C++ source code to an executable file 
> that contains NEON instructions?
>
> Please give an example (C/C++ source code).
>
> I am using compiler: arm-none-linux-gnueabi-gcc.
>
> Thanks and Best Regards,
> =====================
> Tran Van Dung
>
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