[opus] [Opus] [Patch]01-Add ARM5E macros

Timothy B. Terriberry tterribe at xiph.org
Sun May 19 20:21:45 PDT 2013

Timothy B. Terriberry wrote:
> Aurélien Zanelli wrote:
>> Also, if you have any question or comment about it, feel free to contact
>> me.
> A lot of these macros consist of a single ARM instruction, yet specify
> an early clobber constraint for the output. Is that intentional?

Apparently it was Jean-Marc who added those constraints in the original 
file in libspeex (though he couldn't remember why). In any case, I 
committed a modified version of your patch:


Total speed up was 22.3% on test_opus_encoder on a 600 MHz Cortex A8 
using gcc 4.2.1 (there are probably more representative tests and 
certainly better compilers, but that should give an idea of the ballpark).

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