[FFmpeg-devel] [PATCH] SIMD-optimized float_to_int32_fmul_scalar()

Justin Ruggles justin.ruggles
Fri Jan 7 19:15:37 CET 2011

This patch implements float_to_int32_fmul_scalar() for 3dnow, sse, and
sse2 and uses it in the AC3 encoder.

benchmarks (in dezicycles) for scale_coefficients() in ac3enc_float.c:

AMD Athlon 64 X2 6000+ (64-bit Ubuntu)
    C: 137485
3DNow:  52110
  SSE:  50257
 SSE2:  53306

Intel Atom 330 (64-bit Ubuntu)
    C: 595011
  SSE: 149121
 SSE2: 148662


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