[PATCH] Implement optimized DSPUtil.vector_fmul_copy() and use it in apply_window().

[Justin Ruggles]

This does the same thing as vector_fmul() but has 2 src and 1 dst.
Approx. 54% faster in function apply_window() for 3DNow! and SSE.
---
 libavcodec/ac3enc.c            |    4 ++--
 libavcodec/ac3enc_fixed.c      |    2 +-
 libavcodec/ac3enc_float.c      |   16 ++++++----------
 libavcodec/dsputil.c           |    7 +++++++
 libavcodec/dsputil.h           |    1 +
 libavcodec/ppc/float_altivec.c |   17 +++++++++++++++++
 libavcodec/x86/dsputil_mmx.c   |   38 ++++++++++++++++++++++++++++++++++++++
 7 files changed, 72 insertions(+), 13 deletions(-)

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