[FFmpeg-devel] [PATCH 02/12] mips/float_dsp: replace assembly with C implementations
derek.buitenhuis at gmail.com
Thu Feb 26 14:51:10 CET 2015
On 2/26/2015 1:42 PM, James Cowgill wrote:
> The assembly versions have a few problems
> - They only work with mips32r2 enabled
> - They don't work on 64-bits
> - They're massive and complex
> So replace them with C implementations which solve these problems and let GCC
> magically optimize for different platforms. All the functions are manually
> unrolled 4 times (like the assembly code). With the addition of a few restrict
> keywords, the functions produce almost identical assembly to the original
> versions when compiled with gcc -O3.
Why have C implementations in the *MIPS* DSP code? That's silly.
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