Add a Remainder method

[ghost]

Adds a vectorized remainder method that mirrors the C# implementation (not the IEEE one).
Also adds a Truncate method which rounds towards zero unlike the current Round method which rounds towards the nearest integer.
This remainder method is an approximation and does not always equal the C# %, it is however very close.

TODO:

• Add the method
• Tests?
• Benchmarks

Consider:

• Add an IEEERemainder?

[john-h-k]

Sounds good to me. Not sure how to implement it at first glance tho. Would recommend looking at DirectXMath source code for inspiration

[ghost]

Ready for review.

Current benchmark results:

[john-h-k]

Can you modify the test to follow the format of the other ones (no output)? And add a little more test data. Some normal inputs, NaN, ±infinity etc

[ghost]

Sure, the output was mostly to make sure everything is actually working properly.
I'll also add some more cases.

[ghost]

Currently there seems to be issues related to precision which result in weird unexpected results for higher values. I'll have to trace down the actual CLR implementation of %.

[ghost]

Ready for another review.
Current benchmark results:

|    Method |      Mean |     Error |    StdDev |
|---------- |----------:|----------:|----------:|
|    Normal | 67.287 ns | 0.4462 ns | 0.4174 ns |
| MathSharp |  2.729 ns | 0.0411 ns | 0.0384 ns |

[john-h-k]

Appears good to me. Reviewing it from my CS class but I think its thorough enough