compiler_rt: make README visually nice and improve explanations

This commit makes the text more dense with sources, noes the outstanding
audit and adds an explanation of the table before converting everything
to markdown tables.

For the status a checkmark or cross in utf8 encoding are used and the
input and output sizes of all operations are given inclusive comments for
understanding of the routines.

This should document all compiler_rt integer and float routines, but
does not include a documentation of existing ieee floating and math
routines.

0 files changed, 0 insertions, 0 deletions