[FFmpeg-devel] [PATCH 3/3] ac3enc: add SIMD-optimized shifting functions for use with the fixed-point AC3 encoder

[Justin Ruggles]

---
Benchmarks

ac3_lshift_int16():

Athlon64 x86-64:
   C: 12167
 MMX:  1782
SSE2:  2252

Atom 330 x86-64:
   C: 37077
 MMX:  6830
SSE2:  4299

ac3_shift_int32():

Athlon64 x86-64:
   C: 6269
 MMX: 2595
SSE2: 2890

Atom 330 x86-64:
   C: 11421
 MMX:  9088
SSE2:  5520

 libavcodec/ac3dsp.c         |   26 +++++++++++++++
 libavcodec/ac3dsp.h         |   22 +++++++++++++
 libavcodec/ac3enc_fixed.c   |   44 ++------------------------
 libavcodec/x86/ac3dsp.asm   |   74 +++++++++++++++++++++++++++++++++++++++++++
 libavcodec/x86/ac3dsp_mmx.c |   13 +++++++
 5 files changed, 138 insertions(+), 41 deletions(-)

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