Add "Floating Point Special Cases" section to RadixSort docs.

cub/block/block_radix_sort.cuh

@@ -79,6 +79,13 @@ namespace cub {
  * (<tt>unsigned char</tt>, \p int, \p double, etc.) as well as CUDA's \p __half
  * half-precision floating-point type.
  *
+ * \par Floating-Point Special Cases
+ *
+ * - Positive and negative zeros are considered equivalent, and will be treated
+ *   as such in the output.
+ * - No special handling is implemented for NaN values; these are sorted
+ *   according to their bit representations after any transformations.
+ *
  * \par Bitwise Key Transformations
  * Although the direct radix sorting method can only be applied to unsigned
  * integral types, BlockRadixSort is able to sort signed and floating-point

cub/device/device_radix_sort.cuh

@@ -65,6 +65,13 @@ namespace cub {
  * (<tt>unsigned char</tt>, \p int, \p double, etc.) as well as CUDA's \p __half
  * half-precision floating-point type.
  *
+ * \par Floating-Point Special Cases
+ *
+ * - Positive and negative zeros are considered equivalent, and will be treated
+ *   as such in the output.
+ * - No special handling is implemented for NaN values; these are sorted
+ *   according to their bit representations after any transformations.
+ *
  * \par Transformations
  * Although the direct radix sorting method can only be applied to unsigned
  * integral types, DeviceRadixSort is able to sort signed and floating-point

cub/device/device_segmented_radix_sort.cuh

@@ -60,15 +60,9 @@ namespace cub {
  * of the symbolic alphabet, the radix sorting method produces a lexicographic
  * ordering of those keys.
  *
- * \par
- * DeviceSegmentedRadixSort can sort all of the built-in C++ numeric primitive types
- * (<tt>unsigned char</tt>, \p int, \p double, etc.) as well as CUDA's \p __half
- * half-precision floating-point type.  Although the direct radix sorting
- * method can only be applied to unsigned integral types, DeviceSegmentedRadixSort
- * is able to sort signed and floating-point types via simple bit-wise transformations
- * that ensure lexicographic key ordering. DeviceSegmentedRadixSort is stable. For
- * floating-point types -0.0 and +0.0 are considered equal and appear in the
- * result in the same order as they appear in the input.
+ * \par See Also
+ * DeviceSegmentedRadixSort shares its implementation with DeviceRadixSort. See
+ * that algorithm's documentation for more information.
  *
  * \par Usage Considerations
  * \cdp_class{DeviceSegmentedRadixSort}