VFPU: Compute sines and cosines in double precision. #13526
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Let's see if we can do without the special checks in double precision.
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Fixes most of #12900, and should keep #2921 working.
This was originally suggested as a solution for #2921 in #6329 , but I had forgotten about that. While sin/cos might be a little slower than sinf/cosf, I don't think it'll actually matter much in reality.
The proper solution is of course to reverse engineer the PSP VFPU's functions.
Come to think of it, what breaks #12900 might be the response to inf/nan values.. But difficult to easily test.
Anyway, for future work in this area, we have to make sure to thorougly test invalid inputs in addition to the exact cardinal directions and so on.