I have noticed two problems with the interface and implementation of the
ieee.math_real package distributed with ghdl.
Firstly, the IEEE spec defines a function LOG2 as follows:
function LOG2 (X : in REAL ) return REAL;
-- Purpose:
-- Returns logarithm base 2 of X
The supplied body does not provide an implementation.
Secondly, the (overloaded) function LOG() is defined by IEEE as
follows:
function LOG (X: in REAL; BASE: in REAL) return REAL;
-- Purpose:
-- Returns logarithm base BASE of X
whereas the provided package has the following:
function LOG (BASE: positive; X : real) return real;
-- returns logarithm base BASE of X; X > 0
I am not sure whether the bug tracker is intended for bugs in the
library as well as the compiler/simulator itself. If it is, I will log
a bug.
If someone else has not already solved the issue, I could also
generate corrected package interface and body.
Best regards,
Ivan
