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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!
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Ryan C. Gordon committed 2018-05-16 02:03:06 -04:00
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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
================================================================================