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Intel transcendental funtions

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I've been doing an assembly refresher the last couple of days and I ran into some of the transcendental functions (fsin, fcos, and fsincos.) I haven't experimented with these, compared to the standard libary implimentations. The same goes for fsqrt. From what I've gathered these extended operations used to be slow on the Pentium, but are now quite fast. There are some drawbacks to using them though as the input value must be less than PI/4 in magnitude for accurate results (from what I can find in the Intel Software Developer's Manual.) I'm still doing some research on them, but I thought I would just ask if anybody else has experimented with them. I guess one advantage would be that, assuming these take many cycles to complete, you could do integer arithmetic in parallel.

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