[RFC]: add implementation for `math/base/special/round2f`

[sahil20021008]

Description

This RFC proposes to add the implementation of math/base/special/round2f

Related Issues

Related issues #649.

Questions

No.

Other

No.

Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.