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audio: Added ARM NEON versions of audio converters.

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These are _much_ faster than the scalar equivalents on the Raspberry Pi that
I tested on. Often 3x to 4x as fast!

--HG--
extra : rebase_source : a9f90ef5bfdd309d6a3c8e9220ee235d7413cb5d
extra : histedit_source : 61c5ad731eed96f7bb46da40261ed8b14d474624
This commit is contained in:
Ryan C. Gordon 2018-05-16 02:03:06 -04:00
parent 8f939498c0
commit 72aa5ee14c
3 changed files with 555 additions and 2 deletions
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10
docs/README-raspberrypi.md
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@ -27,6 +27,16 @@ OpenGL ES 2.x, it usually comes pre-installed, but in any case:
sudo apt-get install libraspberrypi0 libraspberrypi-bin libraspberrypi-dev
================================================================================
NEON
================================================================================
If your Pi has NEON support, make sure you add -mfpu=neon to your CFLAGS so
that SDL will select some otherwise-disabled highly-optimized code. The
original Pi units don't have NEON, the Pi2 probably does, and the Pi3
definitely does.
================================================================================
Cross compiling from x86 Linux
================================================================================