Files
ffmpeg/libavcodec
Ronald S. Bultje 235e76aeb8 vp9: initial attempt at a idct_idct_4x4 12bpp x86 simd (sse2) impl.
The trouble with this function is that intermediates overflow 31+sign
bits, so I've added some helpers (that will also be used in 10/12bpp
8x8, 16x16 and 32x32) to make that easier, basically emulating a half-
assed pmaddqd using 2xpmaddwd. It's currently sse2-only, if anyone sees
potential in adding ssse3, I'd love to hear it.
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