[paparazzi-commits] [4763] add macro to swap 32bits words if IEEE big endian

[Pascal Brisset]

Revision: 4763
          http://svn.sv.gnu.org/viewvc/?view=rev&root=paparazzi&revision=4763
Author:   hecto
Date:     2010-03-30 09:56:45 +0000 (Tue, 30 Mar 2010)
Log Message:
-----------
 add macro to swap 32bits words if IEEE big endian

Modified Paths:
--------------
    paparazzi3/trunk/sw/airborne/datalink.h

Modified: paparazzi3/trunk/sw/airborne/datalink.h
===================================================================
--- paparazzi3/trunk/sw/airborne/datalink.h     2010-03-29 17:05:48 UTC (rev 
4762)
+++ paparazzi3/trunk/sw/airborne/datalink.h     2010-03-30 09:56:45 UTC (rev 
4763)
@@ -35,6 +35,12 @@
 #define EXTERN extern
 #endif
 
+#ifdef __IEEE_BIG_ENDIAN /* From machine/ieeefp.h */
+#define Swap32IfBigEndian(_u) { _u = (_u << 32) | (_u >> 32); } 
+#else
+#define Swap32IfBigEndian(_) {}
+#endif
+ 
 #include "std.h"
 #include "dl_protocol.h"