Returns the number whose fractional part is the fractional part of the model representation of X, and whose exponent part is I.
Elemental function
Same as X.
If X = 0 the result is zero.
Otherwise, the result is:
FRACTION(X) * 2.0I
SET_EXPONENT (10.5, 1) = 0.65625 * 2.01 = 1.3125
See Real data model.