+/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
+ * is 0. */
+static inline uintmax_t
+rightmost_1bit(uintmax_t x)
+{
+ return x & -x;
+}
+
+/* Returns 'x' with its rightmost 1-bit changed to a zero (e.g. 01011000 =>
+ * 01010000), or 0 if 'x' is 0. */
+static inline uintmax_t
+zero_rightmost_1bit(uintmax_t x)
+{
+ return x & (x - 1);
+}
+
+/* Returns the index of the rightmost 1-bit in 'x' (e.g. 01011000 => 3), or 32
+ * if 'x' is 0.
+ *
+ * Unlike the other functions for rightmost 1-bits, this function only works
+ * with 32-bit integers. */
+static inline uint32_t
+rightmost_1bit_idx(uint32_t x)
+{
+ return x ? ctz(x) : 32;
+}
+
+/* Returns the index of the rightmost 1-bit in 'x' (e.g. 01011000 => 6), or 32
+ * if 'x' is 0.
+ *
+ * This function only works with 32-bit integers. */
+static inline uint32_t
+leftmost_1bit_idx(uint32_t x)
+{
+ return x ? log_2_floor(x) : 32;
+}
+\f