feat: add new C implementation for rempio2f

[dhruvilmehta]

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Resolves #6125 .

Description

What is the purpose of this pull request?

This pull request:

• [RFC]: Add C implementations to base/special/rempio2f #6125 : add new C implementation for rempio2f

Related Issues

Does this pull request have any related issues?

This pull request:

• resolves [RFC]: Add C implementations to base/special/rempio2f #6125

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No.

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• Read, understood, and followed the contributing guidelines.

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Coverage Report

Package	Statements	Branches	Functions	Lines
math/base/special/rempio2	$\color{red}893/907$ $\color{green}+98.46\%$	$\color{red}82/87$ $\color{green}+94.25\%$	$\color{green}5/5$ $\color{green}+100.00\%$	$\color{red}893/907$ $\color{green}+98.46\%$
math/base/special/rempio2f	$\color{red}639/651$ $\color{green}+98.16\%$	$\color{red}69/74$ $\color{green}+93.24\%$	$\color{green}5/5$ $\color{green}+100.00\%$	$\color{red}639/651$ $\color{green}+98.16\%$

The above coverage report was generated for the changes in this PR.

[kgryte]

@dhruvilmehta Thanks for opening this PR. Took a brief look through your implementation and noticed that it diverges from the upstream reference msun implementation. How did you come about your implementation?

[dhruvilmehta]

I went through the rempio2 code and built this. Since this is a single precision input, the output is also an array of size 1. This is what is listed in the msun implementation as well.

I have tested it thoroughly and works fine with both C and js implementation.