Use __builtin_bswap routines for endianness swapping

Signed-off-by: Avik Sil <aviksil@linux.vnet.ibm.com>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Acked-by: Thomas Huth <thuth@de.ibm.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/include/byteorder.h b/include/byteorder.h
index 29910af..3ad4dd1 100644
--- a/include/byteorder.h
+++ b/include/byteorder.h
@@ -17,22 +17,24 @@
 #ifndef BYTEORDER_H
 #define BYTEORDER_H
 
+#include <stdint.h>
+
 static inline uint16_t
 bswap_16 (uint16_t x)
 {
-	return ((x&0xff00) >> 8) | ((x&0xff) << 8);
+	return __builtin_bswap16(x);
 }
 
 static inline uint32_t
 bswap_32 (uint32_t x)
 {
-	return bswap_16(x >> 16) | (bswap_16(x) << 16);
+	return __builtin_bswap32(x);
 }
 
 static inline uint64_t
 bswap_64 (uint64_t x)
 {
-	return (uint64_t) bswap_32(x >> 32) | (uint64_t) bswap_32(x) << 32;
+	return __builtin_bswap64(x);
 }