aboutsummaryrefslogtreecommitdiff
path: root/bits/byteswap.h
diff options
context:
space:
mode:
authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /bits/byteswap.h
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
downloadglibc-a334319f6530564d22e775935d9c91663623a1b4.zip
glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.gz
glibc-a334319f6530564d22e775935d9c91663623a1b4.tar.bz2
(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'bits/byteswap.h')
-rw-r--r--bits/byteswap.h23
1 files changed, 10 insertions, 13 deletions
diff --git a/bits/byteswap.h b/bits/byteswap.h
index 949ed0b..38d8540 100644
--- a/bits/byteswap.h
+++ b/bits/byteswap.h
@@ -1,5 +1,5 @@
/* Macros to swap the order of bytes in integer values.
- Copyright (C) 1997,1998,2000,2001,2002,2005 Free Software Foundation, Inc.
+ Copyright (C) 1997, 1998, 2000, 2001, 2002 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
@@ -25,35 +25,32 @@
#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); __bswap_constant_16 (__bsx); }))
+ ({ unsigned short int __bsx = (x); \
+ ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); }))
#else
static __inline unsigned short int
__bswap_16 (unsigned short int __bsx)
{
- return __bswap_constant_16 (__bsx);
+ return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8));
}
#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__ \
- ({ register unsigned int __bsx = (x); __bswap_constant_32 (__bsx); }))
+ (__extension__ \
+ ({ unsigned int __bsx = (x); \
+ ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \
+ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); }))
#else
static __inline unsigned int
__bswap_32 (unsigned int __bsx)
{
- return __bswap_constant_32 (__bsx);
+ return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
+ (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
}
#endif