Match std's API

[huonw]

All of the interesting functions in https://doc.rust-lang.org/std/primitive.f32.html:

• Trigonometric functions #8 trig
• Inverse trigonmetric functions #9 inverse trig
• exp_m1 #10 exp_m1
• log_1p #11 log_1p
• Hyperbolic functions #12 hyperbolic
• Inverse hyperbolic functions #13 inverse hyperbolic
• Power functions #14 powers
• Logarithms with other bases #15 other logs

[novacrazy]

Has there been any progress on this? Would be great to use some of these in a path-tracer I'm working on.

You may find the trig functions in micromath useful to integrate. I'm not particularly a fan of the bitwise stuff done in that crate, though, which seems to be even slower than the normal ops on regular x86 processors.