[FFmpeg-devel] Question about loop counter

Zuxy Meng zuxy.meng
Tue May 15 10:31:11 CEST 2007


When unrolling loops or do a mmx->sse2 conversion, loop counters need
to be divided by half. E.g. func_c(int n) can accept any n, while
func_mmx(int n) assumes n is even, and func_sse2(int n) requires n to
be a multiple of 4. How to determine whether it's safe?

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