* sysdeps/generic/bits/byteswap.h (__bswap_constant_16): New macro.

	(__bswap_16): Use it.
	(__bswap_constant_32): New macro.
	(__bswap_32): Use it.

3 files changed, 29 insertions, 16 deletions

diff --git a/ChangeLog b/ChangeLog
index eef606b..275603d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2005-10-10  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* sysdeps/generic/bits/byteswap.h (__bswap_constant_16): New macro.
+	(__bswap_16): Use it.
+	(__bswap_constant_32): New macro.
+	(__bswap_32): Use it.
+
 2005-10-10  Ulrich Drepper  <drepper@redhat.com>
 
 	* malloc/arena.c (ptmalloc_unlock_all2): Reset atfork_recursive_cntr.
diff --git a/bits/byteswap.h b/bits/byteswap.h
index 5f08fed..949ed0b 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -25,32 +25,35 @@
 #define _BITS_BYTESWAP_H 1
 
 /* Swap bytes in 16 bit value.  */
+#define __bswap_constant_16(x) \
+     ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
+
 #ifdef __GNUC__
 # define __bswap_16(x) \
     (__extension__							      \
-     ({ unsigned short int __bsx = (x);					      \
-        ((((__bsx) >> 8) & 0xffu) | (((__bsx) & 0xffu) << 8)); }))
+     ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
 #else
 static __inline unsigned short int
 __bswap_16 (unsigned short int __bsx)
 {
-  return ((((__bsx) >> 8) & 0xffu) | (((__bsx) & 0xffu) << 8));
+  return __bswap_constant_16 (__bsx);
 }
 #endif
 
 /* Swap bytes in 32 bit value.  */
+#define __bswap_constant_32(x) \
+     ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >>  8) |	      \
+      (((x) & 0x0000ff00u) <<  8) | (((x) & 0x000000ffu) << 24))
+
 #ifdef __GNUC__
 # define __bswap_32(x) \
   (__extension__							      \
-   ({ unsigned int __bsx = (x);						      \
-      ((((__bsx) & 0xff000000u) >> 24) | (((__bsx) & 0x00ff0000u) >>  8) |    \
-       (((__bsx) & 0x0000ff00u) <<  8) | (((__bsx) & 0x000000ffu) << 24)); }))
+   ({ register unsigned int __bsx = (x); __bswap_constant_32 (__bsx); }))
 #else
 static __inline unsigned int
 __bswap_32 (unsigned int __bsx)
 {
-  return ((((__bsx) & 0xff000000u) >> 24) | (((__bsx) & 0x00ff0000u) >>  8) |
-	  (((__bsx) & 0x0000ff00u) <<  8) | (((__bsx) & 0x000000ffu) << 24));
+  return __bswap_constant_32 (__bsx);
 }
 #endif
 
diff --git a/sysdeps/generic/bits/byteswap.h b/sysdeps/generic/bits/byteswap.h
index 5f08fed..949ed0b 100644
--- a/sysdeps/generic/bits/byteswap.h
+++ b/sysdeps/generic/bits/byteswap.h
@@ -25,32 +25,35 @@
 #define _BITS_BYTESWAP_H 1
 
 /* Swap bytes in 16 bit value.  */
+#define __bswap_constant_16(x) \
+     ((((x) >> 8) & 0xffu) | (((x) & 0xffu) << 8))
+
 #ifdef __GNUC__
 # define __bswap_16(x) \
     (__extension__							      \
-     ({ unsigned short int __bsx = (x);					      \
-        ((((__bsx) >> 8) & 0xffu) | (((__bsx) & 0xffu) << 8)); }))
+     ({ unsigned short int __bsx = (x); __bswap_constant_16 (__bsx); }))
 #else
 static __inline unsigned short int
 __bswap_16 (unsigned short int __bsx)
 {
-  return ((((__bsx) >> 8) & 0xffu) | (((__bsx) & 0xffu) << 8));
+  return __bswap_constant_16 (__bsx);
 }
 #endif
 
 /* Swap bytes in 32 bit value.  */
+#define __bswap_constant_32(x) \
+     ((((x) & 0xff000000u) >> 24) | (((x) & 0x00ff0000u) >>  8) |	      \
+      (((x) & 0x0000ff00u) <<  8) | (((x) & 0x000000ffu) << 24))
+
 #ifdef __GNUC__
 # define __bswap_32(x) \
   (__extension__							      \
-   ({ unsigned int __bsx = (x);						      \
-      ((((__bsx) & 0xff000000u) >> 24) | (((__bsx) & 0x00ff0000u) >>  8) |    \
-       (((__bsx) & 0x0000ff00u) <<  8) | (((__bsx) & 0x000000ffu) << 24)); }))
+   ({ register unsigned int __bsx = (x); __bswap_constant_32 (__bsx); }))
 #else
 static __inline unsigned int
 __bswap_32 (unsigned int __bsx)
 {
-  return ((((__bsx) & 0xff000000u) >> 24) | (((__bsx) & 0x00ff0000u) >>  8) |
-	  (((__bsx) & 0x0000ff00u) <<  8) | (((__bsx) & 0x000000ffu) << 24));
+  return __bswap_constant_32 (__bsx);
 }
 #endif