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Diffstat (limited to 'include/asm-i386/bitops.h')
-rw-r--r--include/asm-i386/bitops.h27
1 files changed, 20 insertions, 7 deletions
diff --git a/include/asm-i386/bitops.h b/include/asm-i386/bitops.h
index ddf1739dc7fd..65679aca4b22 100644
--- a/include/asm-i386/bitops.h
+++ b/include/asm-i386/bitops.h
@@ -332,9 +332,9 @@ static inline unsigned long __ffs(unsigned long word)
* Returns the bit-number of the first set bit, not the number of the byte
* containing a bit.
*/
-static inline int find_first_bit(const unsigned long *addr, unsigned size)
+static inline unsigned find_first_bit(const unsigned long *addr, unsigned size)
{
- int x = 0;
+ unsigned x = 0;
while (x < size) {
unsigned long val = *addr++;
@@ -367,11 +367,7 @@ static inline unsigned long ffz(unsigned long word)
return word;
}
-/*
- * fls: find last bit set.
- */
-
-#define fls(x) generic_fls(x)
+#define fls64(x) generic_fls64(x)
#ifdef __KERNEL__
@@ -414,6 +410,23 @@ static inline int ffs(int x)
}
/**
+ * fls - find last bit set
+ * @x: the word to search
+ *
+ * This is defined the same way as ffs.
+ */
+static inline int fls(int x)
+{
+ int r;
+
+ __asm__("bsrl %1,%0\n\t"
+ "jnz 1f\n\t"
+ "movl $-1,%0\n"
+ "1:" : "=r" (r) : "rm" (x));
+ return r+1;
+}
+
+/**
* hweightN - returns the hamming weight of a N-bit word
* @x: the word to weigh
*