Andreas Rheinhardt ade54335b2 avcodec/x86/simple_idct: Port to SSE2 ...

Before this commit, the (32-bit only) simple idct came in three
versions: A pure MMX IDCT and idct-put and idct-add versions
which use SSE2 at the put and add stage, but still use pure MMX
for the actual IDCT.

This commit ports said IDCT to SSE2; this was entirely trivial
for the IDCT1-5 and IDCT7 parts (where one can directly use
the full register width) and was easy for IDCT6 and IDCT8
(involving a few movhps and pshufds). Unfortunately, DC_COND_INIT
and Z_COND_INIT still use only the lower half of the registers.

This saved 4658B here; the benchmarking option of the dct test tool
showed a 15% speedup.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2025-11-08 18:48:54 +01:00

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aarch64

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arm

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ppc

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x86

avcodec/x86/simple_idct: Port to SSE2

2025-11-08 18:48:54 +01:00

.gitignore

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apv.c

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av1_levels.c

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avcodec.c

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avpacket.c

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bitstream_be.c

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bitstream_le.c

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bitstream_template.c

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cabac.c

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celp_math.c

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codec_desc.c

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dct.c

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golomb.c

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h264_levels.c

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h265_levels.c

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hashtable.c

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htmlsubtitles.c

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jpeg2000dwt.c

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mathops.c

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mjpegenc_huffman.c

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motion.c

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mpeg12framerate.c

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rangecoder.c

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snowenc.c

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