strace/SOURCES/0120-Move-ilog-functions-from-util.c-to-defs.h.patch

From c9e41cd3485fa1a65dc6206c5b210b4be4c5597c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81kos=20Uzonyi?= <uzonyi.akos@gmail.com>
Date: Sat, 13 Jun 2020 18:18:32 +0200
Subject: [PATCH 120/138] Move ilog* functions from util.c to defs.h

* util.c (ILOG2_ITER_, ilog2_klong, ilog2_64, ilog2_32): Move ...
* defs.h: ... here.
---
 defs.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 util.c | 62 --------------------------------------------------------------
 2 files changed, 60 insertions(+), 62 deletions(-)

diff --git a/defs.h b/defs.h
index 3aa07fb..d8bd513 100644
--- a/defs.h
+++ b/defs.h
@@ -1698,4 +1698,64 @@ scno_is_valid(kernel_ulong_t scno)
 
 # define SYS_FUNC(syscall_name) int SYS_FUNC_NAME(sys_ ## syscall_name)(struct tcb *tcp)
 
+#define ILOG2_ITER_(val_, ret_, bit_)					\
+	do {								\
+		typeof(ret_) shift_ =					\
+			((val_) > ((((typeof(val_)) 1)			\
+				   << (1 << (bit_))) - 1)) << (bit_);	\
+		(val_) >>= shift_;					\
+		(ret_) |= shift_;					\
+	} while (0)
+
+/**
+ * Calculate floor(log2(val)), with the exception of val == 0, for which 0
+ * is returned as well.
+ *
+ * @param val 64-bit value to calculate integer base-2 logarithm for.
+ * @return    (unsigned int) floor(log2(val)) if val > 0, 0 if val == 0.
+ */
+static inline unsigned int
+ilog2_64(uint64_t val)
+{
+	unsigned int ret = 0;
+
+	ILOG2_ITER_(val, ret, 5);
+	ILOG2_ITER_(val, ret, 4);
+	ILOG2_ITER_(val, ret, 3);
+	ILOG2_ITER_(val, ret, 2);
+	ILOG2_ITER_(val, ret, 1);
+	ILOG2_ITER_(val, ret, 0);
+
+	return ret;
+}
+
+/**
+ * Calculate floor(log2(val)), with the exception of val == 0, for which 0
+ * is returned as well.
+ *
+ * @param val 32-bit value to calculate integer base-2 logarithm for.
+ * @return    (unsigned int) floor(log2(val)) if val > 0, 0 if val == 0.
+ */
+static inline unsigned int
+ilog2_32(uint32_t val)
+{
+	unsigned int ret = 0;
+
+	ILOG2_ITER_(val, ret, 4);
+	ILOG2_ITER_(val, ret, 3);
+	ILOG2_ITER_(val, ret, 2);
+	ILOG2_ITER_(val, ret, 1);
+	ILOG2_ITER_(val, ret, 0);
+
+	return ret;
+}
+
+#if SIZEOF_KERNEL_LONG_T > 4
+# define ilog2_klong ilog2_64
+#else
+# define ilog2_klong ilog2_32
+#endif
+
+#undef ILOG2_ITER_
+
 #endif /* !STRACE_DEFS_H */
diff --git a/util.c b/util.c
index 59696b5..cde76c1 100644
--- a/util.c
+++ b/util.c
@@ -1120,68 +1120,6 @@ dumpiov_upto(struct tcb *const tcp, const int len, const kernel_ulong_t addr,
 #undef iov
 }
 
-#define ILOG2_ITER_(val_, ret_, bit_)					\
-	do {								\
-		typeof(ret_) shift_ =					\
-			((val_) > ((((typeof(val_)) 1)			\
-				   << (1 << (bit_))) - 1)) << (bit_);	\
-		(val_) >>= shift_;					\
-		(ret_) |= shift_;					\
-	} while (0)
-
-#if SIZEOF_KERNEL_LONG_T > 4
-
-# define ilog2_klong ilog2_64
-/**
- * Calculate floor(log2(val)), with the exception of val == 0, for which 0
- * is returned as well.
- *
- * @param val 64-bit value to calculate integer base-2 logarithm for.
- * @return    (unsigned int) floor(log2(val)) if val > 0, 0 if val == 0.
- */
-static inline unsigned int
-ilog2_64(uint64_t val)
-{
-	unsigned int ret = 0;
-
-	ILOG2_ITER_(val, ret, 5);
-	ILOG2_ITER_(val, ret, 4);
-	ILOG2_ITER_(val, ret, 3);
-	ILOG2_ITER_(val, ret, 2);
-	ILOG2_ITER_(val, ret, 1);
-	ILOG2_ITER_(val, ret, 0);
-
-	return ret;
-}
-
-#else /* SIZEOF_KERNEL_LONG_T == 4 */
-
-# define ilog2_klong ilog2_32
-/**
- * Calculate floor(log2(val)), with the exception of val == 0, for which 0
- * is returned as well.
- *
- * @param val 32-bit value to calculate integer base-2 logarithm for.
- * @return    (unsigned int) floor(log2(val)) if val > 0, 0 if val == 0.
- */
-static inline unsigned int
-ilog2_32(uint32_t val)
-{
-	unsigned int ret = 0;
-
-	ILOG2_ITER_(val, ret, 4);
-	ILOG2_ITER_(val, ret, 3);
-	ILOG2_ITER_(val, ret, 2);
-	ILOG2_ITER_(val, ret, 1);
-	ILOG2_ITER_(val, ret, 0);
-
-	return ret;
-}
-
-#endif /* SIZEOF_KERNEL_LONG_T */
-
-#undef ILOG2_ITER_
-
 void
 dumpstr(struct tcb *const tcp, const kernel_ulong_t addr,
 	const kernel_ulong_t len)
-- 
2.1.4