Improve operator<=

cppalliance · Jul 16, 2024 · 9ffb696 · 9ffb696
1 parent 453114e
commit 9ffb696
Showing 1 changed file with 20 additions and 3 deletions.
diff --git a/include/boost/decimal/decimal32_fast.hpp b/include/boost/decimal/decimal32_fast.hpp
@@ -526,13 +526,30 @@ constexpr auto operator<(decimal32_fast lhs, decimal32_fast rhs) noexcept -> boo
 constexpr auto operator<=(decimal32_fast lhs, decimal32_fast rhs) noexcept -> bool
 {
  #ifndef BOOST_DECIMAL_FAST_MATH
- if (isnan(lhs) || isnan(rhs))
+ if (!isfinite(lhs) || !isfinite(rhs))
  {
- return false;
+ if (isnan(lhs) || isnan(rhs) ||
+ (!lhs.isneg() && rhs.isneg()))
+ {
+ return false;
+ }
+ else if (lhs.isneg() && !rhs.isneg())
+ {
+ return true;
+ }
+ else if (isfinite(lhs) && isinf(rhs))
+ {
+ return !signbit(rhs);
+ }
+ else if (isinf(lhs) && isfinite(rhs))
+ {
+ return signbit(rhs);
+ }
  }
  #endif
 
- return !(rhs < lhs);
+ return !fast_type_less_parts_impl(rhs.significand_, rhs.biased_exponent(), rhs.sign_,
+ lhs.significand_, lhs.biased_exponent(), lhs.sign_);
 }
 
 constexpr auto operator>(decimal32_fast lhs, decimal32_fast rhs) noexcept -> bool