summaryrefslogtreecommitdiff
path: root/bits
diff options
context:
space:
mode:
Diffstat (limited to 'bits')
-rw-r--r--bits/byteswap.h19
1 files changed, 17 insertions, 2 deletions
diff --git a/bits/byteswap.h b/bits/byteswap.h
index 9d658e4472..31e9a16716 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -1,6 +1,5 @@
/* Macros to swap the order of bytes in integer values.
- Copyright (C) 1997,1998,2000-2002,2005,2008,2011
- Free Software Foundation, Inc.
+ Copyright (C) 1997-2012 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -82,6 +81,22 @@ __bswap_32 (unsigned int __bsx)
__r.__l[1] = __bswap_32 (__w.__l[0]); \
} \
__r.__ll; }))
+#elif __GLIBC_HAVE_LONG_LONG
+# define __bswap_constant_64(x) \
+ ((((x) & 0xff00000000000000ull) >> 56) \
+ | (((x) & 0x00ff000000000000ull) >> 40) \
+ | (((x) & 0x0000ff0000000000ull) >> 24) \
+ | (((x) & 0x000000ff00000000ull) >> 8) \
+ | (((x) & 0x00000000ff000000ull) << 8) \
+ | (((x) & 0x0000000000ff0000ull) << 24) \
+ | (((x) & 0x000000000000ff00ull) << 40) \
+ | (((x) & 0x00000000000000ffull) << 56))
+
+static __inline unsigned long long int
+__bswap_64 (unsigned long long int __bsx)
+{
+ return __bswap_constant_64 (__bsx);
+}
#endif
#endif /* _BITS_BYTESWAP_H */