Simplify operator-

Author: mborland

include/boost/decimal/decimal128_fast.hpp

@@ -873,17 +873,9 @@ constexpr auto operator-(decimal128_fast lhs, decimal128_fast rhs) noexcept -> d
 
     const bool abs_lhs_bigger {abs(lhs) > abs(rhs)};
 
-    auto sig_lhs {lhs.full_significand()};
-    auto exp_lhs {lhs.biased_exponent()};
-    detail::normalize<decimal128>(sig_lhs, exp_lhs);
-
-    auto sig_rhs {rhs.full_significand()};
-    auto exp_rhs {rhs.biased_exponent()};
-    detail::normalize<decimal128>(sig_rhs, exp_rhs);
-
     const auto result {detail::d128_sub_impl<detail::decimal128_fast_components>(
-            sig_lhs, exp_lhs, lhs.sign_,
-            sig_rhs, exp_rhs, rhs.sign_,
+            lhs.significand_, lhs.biased_exponent(), lhs.sign_,
+            rhs.significand_, rhs.biased_exponent(), rhs.sign_,
             abs_lhs_bigger
     )};