FFmpeg

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Andreas Rheinhardt cd886bf0a5 avcodec/x86/sbcdsp: Port ff_sbc_analyze_[48]_mmx to SSE2

Halfs the amount of pmaddwd and improves performance a lot:
sbc_analyze_4_c:                                        55.7 ( 1.00x)
sbc_analyze_4_mmx:                                       7.0 ( 7.94x)
sbc_analyze_4_sse2:                                      4.3 (12.93x)
sbc_analyze_8_c:                                       131.1 ( 1.00x)
sbc_analyze_8_mmx:                                      22.4 ( 5.84x)
sbc_analyze_8_sse2:                                     10.7 (12.25x)

It also saves 224B of .text and allows to remove the emms_c()
from sbcenc.c (notice that ff_sbc_calc_scalefactors_mmx()
issues emms on its own, so it already abides by the ABI).

Hint: A pshufd could be avoided per function if the constants
were reordered.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

2026-03-28 11:25:38 +01:00