add basic constants

src/lib.rs

@@ -32,6 +32,11 @@ const M_MASK: u8 = M_STORAGE_MAX;
 const E_MASK: u8 = E_STORAGE_MAX << M_BITS;
 
 /// 8-bit unsigned binary floating-point type, with [`M_BITS`] mantissa bits and [`E_BITS`] exponent bits.
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default)]
 #[repr(transparent)]
 pub struct F8(u8);
+
+impl F8 {
+	pub const ZERO: Self = Self(0);
+	pub const ONE: Self = Self::merge(0, E_BIAS);
+}