Specifies the rounding mode for the compiler to use when evaluating constant floating-point expressions at compile time.
It is equivalent to the -qieee option.
.-n-. >>- -y--+-m-+-------------------------------------------------->< +-p-+ '-z-'
@PROCESS:
@PROCESS IEEE(Near | Minus | Plus | Zero)
-yn
If your program contains operations involving real(16) values, the rounding mode must be set to -yn, round-to-nearest.