Simplify float to/from_bytes and enable tests

src/ops/bytes.rs

@@ -171,45 +171,38 @@ macro_rules! float_to_from_bytes_impl {
  }
  }
 
- #[cfg(all(
- not(feature = "has_float_to_from_bytes"),
- feature = "has_int_to_from_bytes"
- ))]
+ #[cfg(not(feature = "has_float_to_from_bytes"))]
  impl ToFromBytes for $T {
  type Bytes = [u8; $L];
 
  #[inline]
  fn to_be_bytes(&self) -> Self::Bytes {
- <$I as ToFromBytes>::from_ne_bytes(&self.to_ne_bytes()).to_be_bytes()
+ <$I as ToFromBytes>::to_be_bytes(&self.to_bits())
  }
 
  #[inline]
  fn to_le_bytes(&self) -> Self::Bytes {
- <$I as ToFromBytes>::from_ne_bytes(&self.to_ne_bytes()).to_le_bytes()
+ <$I as ToFromBytes>::to_le_bytes(&self.to_bits())
  }
 
  #[inline]
  fn to_ne_bytes(&self) -> Self::Bytes {
- unsafe { transmute(*self) }
+ <$I as ToFromBytes>::to_ne_bytes(&self.to_bits())
  }
 
  #[inline]
  fn from_be_bytes(bytes: &Self::Bytes) -> Self {
- <Self as ToFromBytes>::from_ne_bytes(
- &<$I as ToFromBytes>::from_be_bytes(bytes).to_ne_bytes(),
- )
+ Self::from_bits(<$I as ToFromBytes>::from_be_bytes(&bytes))
  }
 
  #[inline]
  fn from_le_bytes(bytes: &Self::Bytes) -> Self {
- <Self as ToFromBytes>::from_ne_bytes(
- &<$I as ToFromBytes>::from_le_bytes(bytes).to_ne_bytes(),
- )
+ Self::from_bits(<$I as ToFromBytes>::from_le_bytes(&bytes))
  }
 
  #[inline]
  fn from_ne_bytes(bytes: &Self::Bytes) -> Self {
- unsafe { transmute(*bytes) }
+ Self::from_bits(<$I as ToFromBytes>::from_ne_bytes(&bytes))
  }
  }
  };
@@ -356,7 +349,6 @@ mod tests {
  check_to_from_bytes!(i128 u128);
  }
 
- #[cfg(feature = "has_float_to_from_bytes")]
  #[test]
  fn convert_between_float_and_bytes() {
  macro_rules! check_to_from_bytes {