Changes in kernel/generic/include/bitops.h [b3f8fb7:7a0359b] in mainline

File:

• kernel/generic/include/bitops.h (modified) (4 diffs)

kernel/generic/include/bitops.h

@@ -27 +27 @@
  */
 
-/** @addtogroup generic 
+/** @addtogroup generic
  * @{
  */
@@ -36 +36 @@
 #define KERN_BITOPS_H_
 
+#include <trace.h>
 
-/** Return position of first non-zero bit from left (i.e. [log_2(arg)]).
+#ifdef __32_BITS__
+        #define fnzb(arg)  fnzb32(arg)
+#endif
+
+#ifdef __64_BITS__
+        #define fnzb(arg)  fnzb64(arg)
+#endif
+
+/** Return position of first non-zero bit from left (32b variant).
  *
- * If number is zero, it returns 0
+ * @return 0 (if the number is zero) or [log_2(arg)].
+ *
  */
-static inline int fnzb32(uint32_t arg)
+NO_TRACE static inline uint8_t fnzb32(uint32_t arg)
 {
-        int n = 0;
-
+        uint8_t n = 0;
+        
         if (arg >> 16) {
                 arg >>= 16;
@@ -65 +75 @@
         }
         
-        if (arg >> 1) {
-                arg >>= 1;
+        if (arg >> 1)
                 n += 1;
-        }
         
         return n;
 }
 
-static inline int fnzb64(uint64_t arg)
+/** Return position of first non-zero bit from left (64b variant).
+ *
+ * @return 0 (if the number is zero) or [log_2(arg)].
+ *
+ */
+NO_TRACE static inline uint8_t fnzb64(uint64_t arg)
 {
-        int n = 0;
-
+        uint8_t n = 0;
+        
         if (arg >> 32) {
                 arg >>= 32;
@@ -85 +98 @@
 }
 
-#define fnzb(x) fnzb32(x)
-
 #endif