I am having an issue while using the Altera's floating point adder....
while performing addition or subtraction between a
subnormal and a
normal number, altera's core treats all subnormal numbers as zero so it always outputs the normal operand. This is true if we add a larger normal number with a subnormal number but for a normal number which is very close to the subnormal range, we have significant amount of error
For example
if
4.778436e-39 (a subnormal) is added with
2.458775e-37(a normal)
Output from Altera's core 2.45877e-37
While the actual answer is 2.506560e-37
Anybody knows if there is any exception in IEEE754 Floating Point standard regarding subnormal and normal addition/subtraction ????
