add public API

src/conv.rs

@@ -73,6 +73,33 @@ impl F8 {
 		}
 		Self::merge(m as u8 & M_STORAGE_MAX, e as u8)
 	}
+
+	pub fn from_bits(bits: u8) -> Self {
+		Self(bits)
+	}
+
+	pub fn to_bits(self) -> u8 {
+		self.0
+	}
+
+	/// Calculate `base * 2.pow(scale)`, preserving as much precision as possible.
+	pub fn ldexp(base: u32, scale: i32) -> Self {
+		Self::merge_unbias(base, scale)
+	}
+
+	/// Split `self` into `(base, scale)` such that `self = base * 2.pow(scale)`.
+	///
+	/// ```
+	/// # use f8::F8;
+	/// # let val = F8::from_bits(42);
+	/// let (base, scale) = val.frexp();
+	/// let val2 = F8::ldexp(base, scale);
+	/// assert_eq!(val, val2);
+	/// ```
+	pub fn frexp(self) -> (u32, i32) {
+		let (base, scale) = self.split_unbias();
+		(base.into(), scale.into())
+	}
 }
 
 #[cfg(test)]