Does logarithm megafunction do well??

Hello Sir,

I am using ALTFP_LOG megafunction in my application,

so when i verify this ip core, i get abnormal results for

particular integer values.

If i give particular inputs of few numbers to ALTFP_LOG,

i was unable to get the accurate values to the given inputs.

For example, i'm using counter as input data block to generate some values

for the inputs of ALTFP_LOG megafunction,

or say that i'm using ALTFP_CONVERT to convert Integer-to-Float from the

counter due to input format of ALTFP_LOG megafunction.

and for the input values respected output values are given below..

x - ln(x)

1 - 0

2 to 4 - 1

5 to 12 - 2

13 to 33- 3

34 to 92- 4

so on...

but if we see the value of ln(92) = 4.5217885770490403096412170747265,

but here we see 4 as output..

as we check for the value for some hundred's or thousand's number,

the IP ALTFP_LOG megafunction output will not be correct.

So i would like to know how accurate this IP core is?

what i must do to get expected or accurate result..

Please kindly do the needful..