Conversion to floating-point format (double precision) (Floating-point Convert Unsigned-Word to Double (Double))
This instruction arithmetically converts the unsigned 32-bit fixed-point format contents of general-purpose register reg1 to double-precision floating-point format, in accordance with the current rounding mode, and stores the result in the register pair specified by general-purpose register reg2.
This conversion operation is performed accurately, without any loss of precision.