vhdl-indent-comment-like-next-code-line

vhdl-indent-comment-like-next-code-line is a variable defined in `vhdl-mode.el'.
Its value is

t

Documentation:
Non-nil means comment lines are indented like the following code line.
Otherwise, comment lines are indented like the preceding code line.
Indenting comment lines like the following code line gives nicer indentation
when comments precede the code that they refer to.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.3 of Emacs.