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The result is the value obtained by taking the mantissa of X with an exponent value of I; this is equal to SCALE(X,I−EXPONENT(X)) except for IEEE infinities and NaNs, where the result is a NaN.
(An alternative formulation would be FRACTION(X)*REAL(RADIX(X))**I.)
Like many intrinsic functions, this is elemental; the result has the same shape as X, with the operation being applied elementwise.
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