freebsd_network: Move ffs/fls routines to libkern.h and use builtins.

FreeBSD upstream did this a while back. Should fix the 32-bit build.
2024-06-24 21:56:08 -04:00
parent 86021fd407
commit 1f33dab2e6
2 changed files with 35 additions and 47 deletions
@@ -144,53 +144,6 @@ enable_intr(void)
 	__asm __volatile("sti");
 }

-#ifdef _KERNEL
-
-#define	HAVE_INLINE_FFS
-#define        ffs(x)  __builtin_ffs(x)
-
-#define	HAVE_INLINE_FFSL
-
-static __inline int
-ffsl(long mask)
-{
-	return (mask == 0 ? mask : (int)bsfq((u_long)mask) + 1);
-}
-
-#define	HAVE_INLINE_FFSLL
-
-static __inline int
-ffsll(long long mask)
-{
-	return (ffsl((long)mask));
-}
-
-#define	HAVE_INLINE_FLS
-
-static __inline int
-fls(int mask)
-{
-	return (mask == 0 ? mask : (int)bsrl((u_int)mask) + 1);
-}
-
-#define	HAVE_INLINE_FLSL
-
-static __inline int
-flsl(long mask)
-{
-	return (mask == 0 ? mask : (int)bsrq((u_long)mask) + 1);
-}
-
-#define	HAVE_INLINE_FLSLL
-
-static __inline int
-flsll(long long mask)
-{
-	return (flsl((long)mask));
-}
-
-#endif /* _KERNEL */
-
 static __inline void
 halt(void)
 {
@@ -26,6 +26,41 @@ static __inline int imin(int a, int b) { return (a < b ? a : b); }
 extern int abs(int a);


+#define        ffs(x)  __builtin_ffs(x)
+
+static __inline __pure2 int
+ffsl(long mask)
+{
+	return (__builtin_ffsl((u_long)mask));
+}
+
+static __inline __pure2 int
+ffsll(long long mask)
+{
+	return (__builtin_ffsll((unsigned long long)mask));
+}
+
+static __inline __pure2 int
+fls(int mask)
+{
+	return (mask == 0 ? 0 :
+		8 * sizeof(mask) - __builtin_clz((u_int)mask));
+}
+
+static __inline __pure2 int
+flsl(long mask)
+{
+	return (mask == 0 ? 0 :
+		8 * sizeof(mask) - __builtin_clzl((u_long)mask));
+}
+
+static __inline __pure2 int
+flsll(long long mask)
+{
+	return (mask == 0 ? 0 :
+		8 * sizeof(mask) - __builtin_clzll((unsigned long long)mask));
+}
+
 __END_DECLS

 #endif /* _FBSD_COMPAT_SYS_LIBKERN_H_ */