Rounds X to the nearest integer value (as real). If X is halfway between two integers, rounding is away from 0.0.
function ROUND (X : in REAL ) return REAL;
Rounds X to the nearest integer value (as real). If X is halfway between two integers, rounding is away from 0.0.
https://standards.ieee.org/downloads/1076/1076.2-1996/math_real.vhdl