pub type DnW<'a, REG> = BitWriter<'a, REG, Dn>;
Field DN writer - Default value for FPSCR.DN (Default NaN mode control bit).
DN
pub struct DnW<'a, REG> { /* private fields */ }
NaN operands propagate through to the output of a floating-point operation.
Any operation involving one or more NaNs returns the Default NaN.