Return exponent of slope of registered data type
extern int ssGetDataTypeFixedExponent (SimStruct *S, DTypeId dataTypeId)
Fixed-point numbers can be represented as
real-world value = (slope × integer) + bias,
where the slope can be expressed as
slope = fractional slope × 2exponent.
This function returns the exponent of a registered fixed-point data type:
For power-of-two scaling, the exponent is the negative of the fraction length.
If the data type has trivial scaling, including for data types single and double, the exponent is 0.
If the registered data type is ScaledDouble, the exponent returned is that of the nonoverridden data type.
This function errors out when ssGetDataTypeIsFxpFltApiCompat returns FALSE.
To use this function, you must include fixedpoint.h and fixedpoint.c. For more information, see Structure of the S-Function.