*/
#include <asm/bitops.h>
+
+static inline int generic_fls64(__u64 x)
+{
+ __u32 h = x >> 32;
+ if (h)
+ return fls(h) + 32;
+ return fls(x);
+}
+
static __inline__ int get_bitmask_order(unsigned int count)
{
int order;
return order; /* We could be slightly more clever with -1 here... */
}
+static __inline__ int get_count_order(unsigned int count)
+{
+ int order;
+
+ order = fls(count) - 1;
+ if (count & (count - 1))
+ order++;
+ return order;
+}
+
/*
* hweightN: returns the hamming weight (i.e. the number
* of bits set) of a N-bit word
return sizeof(w) == 4 ? generic_hweight32(w) : generic_hweight64(w);
}
+/*
+ * rol32 - rotate a 32-bit value left
+ *
+ * @word: value to rotate
+ * @shift: bits to roll
+ */
+static inline __u32 rol32(__u32 word, unsigned int shift)
+{
+ return (word << shift) | (word >> (32 - shift));
+}
+
+/*
+ * ror32 - rotate a 32-bit value right
+ *
+ * @word: value to rotate
+ * @shift: bits to roll
+ */
+static inline __u32 ror32(__u32 word, unsigned int shift)
+{
+ return (word >> shift) | (word << (32 - shift));
+}
+
#endif