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Prettz · 4th April 2003, 21:25

I'm not sure if this question can really be answered, but about how much difference in quality should you expect using idct=5 (32bit SSE2) with MPEG2Dec3 versus, say, using the 64bit FPU mode (or the 64bit IEEE reference mode)? Would any differences be dependent on the source?

Also, wouldn't there be a way to do the algorithm with 64bit SSE2? I can understand if it's just that nobody wants to code that right now, but I'm just curious since I thought I remembered there being both 32bit and 64bit versions of all of the SSE2 instructions.

4th April 2003, 21:25	#138 \| Link
Prettz easily bamboozled user Join Date: Sep 2002 Location: Atlanta Posts: 373	I'm not sure if this question can really be answered, but about how much difference in quality should you expect using idct=5 (32bit SSE2) with MPEG2Dec3 versus, say, using the 64bit FPU mode (or the 64bit IEEE reference mode)? Would any differences be dependent on the source? Also, wouldn't there be a way to do the algorithm with 64bit SSE2? I can understand if it's just that nobody wants to code that right now, but I'm just curious since I thought I remembered there being both 32bit and 64bit versions of all of the SSE2 instructions.