[FFmpeg-devel] [PATCH] yasm ff_imdct_half_sse
Sun Aug 22 16:14:20 CEST 2010
2010/8/22 M?ns Rullg?rd <mans at mansr.com>:
> Alex Converse <alex.converse at gmail.com> writes:
>> On Wed, Aug 18, 2010 at 10:46 PM, Loren Merritt <lorenm at u.washington.edu> wrote:
>>> On Wed, 18 Aug 2010, Alex Converse wrote:
>>>> The attached patch ports the ff_imdct_half_sse function to yasm. This wasn't
>>>> done out of any desire for yasm purity. The split asm sections were
>>>> problematic on platforms where xmm registers are callee saved (WIN64). It
>>>> seems worthwhile to move toward supporting out mdct audio decoders on
>>>> WIN64. It also gives fine grain control over exactly what spills when and
>>>> and reduces fft calling overhead.
> What's the holdup?
Loren said CMUL could be more cleanly ordered.
I asked him to elaborate as I shamelessly stole the macro from him unchanged.
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