some basic math ops are missing

[bsdz]

Some useful math operators are missing in Parrot.

round() (known by same name in C) cot() (cotangent)

A workaround for now is to use floor(x+.5) for round() and 1/tan for cot.

[jkeenan]

Replying to bsdz:

> Some useful math operators are missing in Parrot.
> 
> round() (known by same name in C)
> cot() (cotangent)

csc() (cosecant) also appears to be missing.

[Paul C. Anagnostopoulos]

May I suggest that all four float -> integer conversion functions be included:

ceiling() floor() round() truncate()

[Paul C. Anagnostopoulos]

We decided during various chats on #parrot that a round operation should not be added. We didn't want to have to decide what sort of rounding to perform. It was also decided not to add truncate, but I did update the documentation to specify that floating-point to integer conversion is done by truncation. That is now part of the specification of assignment.

I added cot and csc operations for native numbers and also for the Float PMC. These operations were already supported for the Complex PMC.

[cotto]

+1 to apply this. The patch looks sane and all tests pass. If nobody beats me to it, I'll plan on applying this later today.

[Paul C. Anagnostopoulos]

Thanks to cotto for applying this patch in r48564.