---

yaml --- r: 91621 b: refs/heads/master c: 9f264be h: refs/heads/master i: 91619: 9c42986 v: v3
git-mirror · Apr 18, 2008 · 8f89ebb · 8f89ebb
1 parent 225a775
commit 8f89ebb
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Showing 2 changed files with 18 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 945feb174b14e7098cc7ecf0cf4768d35bc52f9c
+refs/heads/master: 9f264be6101c42cb9e471c58322fb83a5cde1461
diff --git a/trunk/include/asm-powerpc/bitops.h b/trunk/include/asm-powerpc/bitops.h
@@ -312,7 +312,24 @@ static __inline__ int fls(unsigned int x)
 	asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x));
 	return 32 - lz;
 }
+
+/*
+ * 64-bit can do this using one cntlzd (count leading zeroes doubleword)
+ * instruction; for 32-bit we use the generic version, which does two
+ * 32-bit fls calls.
+ */
+#ifdef __powerpc64__
+static __inline__ int fls64(__u64 x)
+{
+	int lz;
+
+	asm ("cntlzd %0,%1" : "=r" (lz) : "r" (x));
+	return 64 - lz;
+}
+#else
 #include <asm-generic/bitops/fls64.h>
+#endif /* __powerpc64__ */
+
 #include <asm-generic/bitops/hweight.h>
 #include <asm-generic/bitops/find.h>